Unit of light sources, illumination device, display device and television receiver

FIELD: electricity.

SUBSTANCE: light-source unit includes a light-emitting diode 17 serving as a light source, diffuser lens 19, reflective sheet 23 of the board and a limiter 27. The diffuser lens 19 is faced towards emitting surface 17a of light emitted by the light-emitting diode 17. The reflective sheet 23 of the board is placed so that it is faced towards surface of the diffuser lens 19 which is located closer to the light-emitting diode 17 and configured for the purpose of light reflection. The limiter 27 protrudes from the diffuser lens 19 in direction of reflective sheet 23 of the board and it limits mutual alignment between the diffuser lens 19 and reflective sheet 23 of the board.

EFFECT: removing irregularity of the light emitted from the diffuser lens.

32 cl, 29 dwg

 

The technical FIELD

The present invention relates to a light source unit, lighting device, display device and television receiver.

The LEVEL of TECHNOLOGY

For example, a liquid crystal panel used for a liquid crystal display device such as LCD TV, does not emit light and thus, the backlight unit is required as a separate lighting device. Known backlight unit, which is arranged behind the liquid crystal panel (on the side opposite to the surface of the display). The backlight unit includes a chassis having an aperture on the side of its surface, which is directed to the liquid crystal panel, the color source, housed in a chassis, and an optical element (such as a diffuser sheet)provided in the opening of the chassis for effective output light emitted from a light source on the side of the liquid crystals. Light sources (such as LEDs).

LED can be used for light source and, in this case, the charge LED, which has LED placed in the chassis. The light emitted from the LED tends to have a high directivity. Therefore, the objective lens may be provided for each LED in order to reduce bias. The lenses of the lens is provided on p is at the LED. It was known illumination device including LEDs and lenses of the lens, disclosed in Patent document 1.

Patent document 1: Unexamined publication No. 2008-304839 Japan patent

The PROBLEM WHICH MUST BE SOLVED by the INVENTION

In the case of lenses of the lens, all of the rays of light emitted from the LED, not necessarily penetrate into the lens of the lens out, and at least part of the light rays can be reflected by the lenses of the lens and directed to the card LED. To deal with this case, the inventor of the present invention uses the configuration of the reflective element between the lenses of the lens and the adapter LED. Accordingly, light that is reflected by the lens of the lens on the side of the Board LED, again reflected by the reflective element on the lens of the lens in order to effectively use light emitted from a light source.

The reflective element may be provided on-Board LED with double sided adhesive tape. However, in this case, if the reflective element may thermally expand or contract, the deformation or distortion may actively occur in areas of the reflective element that is not attached double-sided adhesive tape, or who have low fastening force, and this may cause places the second deformation. This may cause unevenness of the light reflected by the reflective element and to cause unevenness of light emitted from the lenses of the lens.

To prevent the above problems, it may be suggested that the reflective element is attached to the card LED. However, if so, the mutual position between the lenses of the lens and the reflective element becomes unstable. For example, if the reflective element is tilted, the light reflected by reflective element, and may be somewhat at an angle. This can cause uneven distribution of light reflected by reflective element and penetrates into the lens of the lens, as this may cause unevenness of the light emitted from the lenses of the lens. Accordingly, the required optical power may fail.

The DISCLOSURE of the PRESENT INVENTION

The present invention was made in view of the above circumstances. The purpose of the present invention is to stably achieve the desired optical power.

A MEANS FOR SOLVING PROBLEMS

To solve the above problems, the light source unit according to the present invention includes a light source having the surface of the light emission, the optical component is provided to be drawn to the surface of emission of the Saint is the one the reflective element provided to be drawn to the surface of the optical component, which is close to the light source and configured to reflect light, and restrictive element extending from one of the optical component and the reflective element toward the other one of the optical and reflective element, and configured to restrict relative position between the optical component and the reflective element.

Accordingly, light emitted from the light source passes through the optical component, which is directed to the surface of the light emission and it uses optical effects to the light, and the light received optical effects, emerges from the optical component. Some part of the light emitted from the light source can be reflected by the optical component and to return toward the light source. Such light is reflected by reflective element and is back on the side of the optical component to be used effectively. The distribution of light reflected from the reflective element and penetrating into the optical component may vary according to the relative positioning between the optical component and the reflective element. In the present invention, the guide element extending from one of the protected areas the economic component and the reflective element toward the other one of the optical component and the reflective element, restricts the mutual position between the optical component and the reflective element. Therefore, the distribution of light reflected from the reflective element and penetrating into the optical component should change less likely, and this stabilizes the distribution of light emitted from the optical component.

May be preferred following configuration.

(1) Restrictive element can be formed to have a gap between the limiting element and the other one of the optical component and the reflective element.

In this configuration, the guide element and the other one of the optical component and the reflective element are not in contact with each other. Therefore, the reflective element easily expands or contracts due to thermal expansion or thermal contraction, and deformation such as deflection or buckling less likely to occur in the reflective element. Accordingly, the unevenness is less likely to be invoked in the light reflected by reflective element.

(2) Restrictive element can be formed to be in contact with another one of the optical component and the reflective element, with no gap between the limiting element and the optical component.

In this configuration, bounding the element is brought into contact with the optical component, with no gap between them. The reflective element is not deformed, in order to become closer to the optical component, and it maintains a constant mutual arrangement between the reflective element and the optical component. This stabilizes the distribution of light reflected by reflective element and enters the optical component.

The restrictive element may include many of the restrictive elements, and restrictive elements may be provided scattered over the surface are facing each other of the surfaces of the optical component and the reflective element. In this configuration, the guide element is provided for scattered within the surface area which are facing each other of the surfaces of the optical component and the reflective element, effectively restricts the mutual position between the optical component and the reflective element.

(4) Restrictive elements may be provided at equal intervals. In this configuration, the relative positions between the optical component and the reflective element may be limited, however, to be balanced on the surface of which facing each other of the surfaces of the optical component and reflectors for safe d is inogo element. This stabilizes the distribution of light reflected from the reflective element and penetrating into the optical component.

(5) the light Source may be a point light source, which is formed in a dot shape in the top view. Even if the light emitted from the point light source has a high directivity, the light passes through the optical component, from the condition that the optical effects of reduced orientation was used to the light, and out of the optical component.

(6) Restrictive element may be provided so as to be farther from a point light source in the top view. In this configuration, the light quantity of the reflected optical component, tends to have a distribution, so that it is inversely proportional to the distance from the light source. The restrictive element is provided so as to be farther from the light source and to have a relatively small amount of light reflected by the optical component. This reduces optical effects caused by the restrictive element in the light reflected by the optical component, and the light reflected by reflective element. Accordingly, the light now penetrates into the optical component.

(7) Restrictive element may include many of the restrictive elements, and restrictive elements may be the provided, to be equal to the distance from a point light source. Accordingly, the distance between each of the bounding element and the light source is equal, and therefore, the optical effect is called uniformly each of restrictive elements in the light reflected by the optical component, and the light reflected by reflective element. Therefore, unevenness is less likely to be invoked in the light, penetrating into the optical component.

(8) Restrictive elements may be provided with equal angular intervals. Accordingly, the unevenness is less likely to be invoked in the light, penetrating into the optical component.

(9) the light source Unit may further include a charge of the light source, having an installation surface on which the point light source, and having a reflective element which is overlapped on the installation surface. The reflective element may include a mounting hole of the light source, through which is mounted a point light source. Accordingly, a point light source mounted on the circuit Board of the light source, is mounted through the mounting hole of the light source of the reflective element, from the condition that the surface of the light emission was directed to the optical component and the light efficiently into the optical the cue component.

(10) the Restrictive element may be provided to cover the outer edge of the circuit Board of the light source in the top view. In this configuration, the reflective element is inserted between the limiting element and the printed circuit Board of the light source, so as to effectively limit the mutual position between the optical component and the reflective element. The restrictive element is provided so as to overlap a part of the outer edge of the circuit Board of the light source in the top view, and in order to be furthest from the light source. The restrictive element is less likely to have optical effect on the light reflected by the optical component, and the light reflected by reflective element. Therefore, light can efficiently penetrate into the optical component.

(11) the Reflective element may be larger in size than the charge of the light source, in the top view. Charge of the light source is relatively smaller than the reflective element in the top view. This reduces the cost of materials circuit Board of the light source. Charge of the light source is reduced in size, and uses reflective element that is larger than the charge of the light source. Accordingly, the light from the optical component is effectively reflected by the reflective element of the optical component.

(12) the Optical component is connected in yourself installation part, which acts in the direction of the Board of the light source, and can be configured to be mounted on the charge of the light source, and the installation part can be provided, to be farther from a point light source in the top view. In this configuration, the optical component is mounted on the charge of the light source through the installation part. The installation part is intended to be remote from a point light source in the top view. Therefore, the installation part is less likely to have optical effect on the light reflected by the optical component, and the light reflected by reflective element. Accordingly, the light now penetrates into the optical component.

(13) the Reflective element may include a hole installation installation part, through which is mounted the installation part. Accordingly, the installation part is mounted through a hole installation installation part, in order to determine the relative position of the reflective element and the optical component in a direction along which are facing each other surfaces.

(10) the Gap can be formed between the mounting hole mounting part and the mounting part. In this configuration, thermal expansion or thermal contraction of the reflective element provided prob is a possibility within the range of the gap.

(15) the Restrictive element can be provided as a part of the optical component and is intended to be further from the installation part on the optical component. In this configuration, the relative positions between the optical component and the reflective element is limited to a position further away from the installation part. If the bounding element provided closest to the installation part on the optical component, the guide element can be mounted in the hole of the mounting installation section. However, this problem is not caused in the present invention, and the limiting function of the restrictive element is reliably performed.

(16) Installation part may include a set of installation parts, and restrictive element may include many of the restrictive elements, and the installation part and restrictive elements may be provided alternately in the circumferential direction of the optical component. In this configuration, installation, parts and restrictive elements are provided, and preferably dispersed on the surface of which facing each other of the surfaces of the optical component and the reflective element. Therefore, balanced optical component supported by the installation of the hour is s, and restrictive elements balanced restrict the mutual position between the optical component and the reflective element.

(17) the Installation part and restrictive elements may be provided at equal intervals. In this configuration, installation, parts and restrictive elements provided balanced on the surface of which facing each other of the surfaces of the optical component and the reflective element. Therefore, the limiting function of the restrictive elements and the supporting function of the installation parts supporting the optical component, effectively executed.

(18) the Installation part and restrictive elements may be provided to be equal to the distance from a point light source. In this configuration, each mounting portion and each of the bounding element has optical effects evenly in the light reflected by the optical component, and the light reflected by reflective element. Therefore, unevenness is less likely to occur in the light, penetrating into the optical component.

(19) the Restrictive element can be provided as a part of the optical component and formed continuously from the installation part. This improves the durability of the installation part.

(20) the Bounding e is ement can be formed, to surround the installation part. This further improves the strength of the installation part.

(21) the Restrictive element can be provided as a part of the optical component and adjacent to the installation part on the optical component. This limits the mutual position between the optical component and the reflective element at a position close to the installation part. Accordingly, the installation part and the bounding element arranged in one position on the optical component, and this simplifies the design of the optical component.

(22) a Point light source may be arranged essentially in the center of the optical component. Accordingly, the optical design of the optical component is inexpensive, and the cost of production of the optical component can be reduced.

(23) a Point light source can be LED. This achieves improved brightness and low energy consumption.

(24) the Optical component can be a component of svetorasseivateley configured for scattering light. Accordingly, light emitted from a point light source, the scattered component of svetorasseivateley and is derived from component svetorasseivateley. If the light emitted from the point light source has a high directivity, the directivity can eff the objective to decline.

(25) the Restrictive element can be provided as a part of the optical component. In comparison with a case in which the restrictive element is provided as a part of the plate with the reflective element, the production cost can be reduced.

(26) the Reflective element may be provided, to be paid to the bounding element and includes a contact portion configured for entering into contact with the bounding element. Accordingly, the contact portion of the restraining element is in contact with the bounding element, from the condition that the mutual position between the optical component and the reflective element is securely confined.

(27) the Reflective element may have a contact hole through which is mounted a restrictive element, and a contact hole may have a peripheral surface configured to enter into contact with the bounding element. Accordingly, the peripheral surface of the contact hole is in contact with the bounding element, which is mounted through a pin hole, and the friction force is produced between them. This friction limits the mutual position between the optical component and the reflective element.

(28) Restrictive El the element can be formed, to be slanted towards the outer end, and has a beveled surface which is facing to the peripheral surface of the contact hole. In this configuration, the guide element is in steady contact with the peripheral surface of the contact hole, and it reliably achieves limiting function.

(29) the Restrictive element can be provided as a part of the reflective element. If the restrictive element is provided as a part of the optical component, the optical design requires taking into account that the light penetrating the optical component extends in a restrictive element. Compared with such a case, the optical design of the optical component is simple.

(30) the Restrictive element may be provided separately from the reflective element, and may be attached to the reflective element to be provided as an integral part of him. This simplifies the manufacturing process for the preparation of the restrictive element as a part of the reflective element.

(31) a Restrictive element may have a curved surface, which is addressed to another one of the optical component and the reflective element. Accordingly, if the bounding element comes in contact with another one of the optical the CSO component and the reflective element, another one of the optical component and the reflective element is easy to smoothly move relative to the bounding element. This provides a reflective element, the ability to thermally expand or contract to a greater degree.

(32) a Restrictive element may have a spherical surface, which is addressed to another one of the optical component and the reflective element. If the restrictive element is in contact with another one of the optical component and the reflective element, the other one of the optical component and the reflective element easy to smoothly move relative to the bounding element, and it provides a reflective element, the ability to thermally expand or contract to a greater degree.

(33) the Reflective element may be larger in size than the optical component, in the top view. With this configuration, light reflected by the optical component may be reflected by reflective element to the area over a wide range. This further improves the light utilization efficiency.

(34) the Optical component may be an optical lens configured for scattering or gathering light. Accordingly, light emitted from the light source, scattered from or going to pricheskoj lens and is available from the lenses of the lens.

(35) Optical lens may be a lens of the lens, configured for scattering light. Accordingly, light emitted from the light source is dissipated through and is output from the optical lens, and the unevenness is less likely to be called in the coming light.

(36) Then, for solving the above problem, a lighting device according to the present invention includes the light source unit described above, the chassis configured to accommodate the light source unit therein, and a reflective element chassis provided along the inner surface of the chassis and having a mounting hole of the optical component through which is mounted the optical component.

In this lighting device, the light source unit limits the unevenness caused in the light emerging from the optical component, and therefore, unevenness is less likely to be invoked in the output light of the lighting device.

In the above lighting device, it is preferable that the reflective element was provided in the space within the holes of the mounting of the optical component in the top view, and so as to overlap the edge portion of the hole of the mounting of the optical component in the top view. Accordingly, light propagating in the space before the lah holes mounting the optical component of the reflective element of the chassis, effectively reflected by the reflective element of the optical component, and this improves the light utilization efficiency.

Then, to solve the above problems, the display device of the present invention may include the above lighting device, and a display panel configured for issuing a display using light from the lighting device.

In this display device, lighting device that supplies the light to the display panel, it is less likely should cause unevenness of the outgoing light. It achieves display having excellent display quality.

The display panel may be a liquid crystal panel. The display device as a liquid crystal display device has a variety of applications, such as a television or a display of a personal computer. More precisely, it is suitable for a display device with a large screen.

A USEFUL RESULT of INVENTIONS

According to the present invention can stably produce the required optical power.

BRIEF DESCRIPTION of DRAWINGS

Fig. 1 - exploded view in perspective illustrating the overall configuration of a television receiver according to the first variant implementation of the present invention;

Fig. 2 - exploded view in perspective illustrating the overall configuration of the liquid crystal display device included in the television receiver;

Fig. 3 is a top view illustrating the configuration of the PCB layout LED and fixation in the chassis included in the liquid crystal display device;

Fig. 4 is a view in cross section of a liquid crystal display device, taken along the line iv-iv in Fig. 3;

Fig. 5 is a view in cross section of a liquid crystal display device, taken along the line v-v in Fig. 3;

Fig. 6 is a top view illustrating a detailed configuration of the PCB layout LED and fixation;

Fig. 7 is a view in cross section of the LED unit, taken along the direction of axis X;

Fig. 8 is a view in cross section of the LED unit, taken along the Y axis direction;

Fig. 9 is a view in cross section of the LED unit, taken along the line ix-ix in Fig. 6;

Fig. 10 is a top view illustrating the charge LED;

Fig. 11 is a top view illustrating the LED array;

Fig. 12 is a top view illustrating the fixation element type with single function;

Fig. 13 is a bottom view illustrating the fixation element type with single function;

Fig. 14 is a top view illustrating the fixation element multi-type;

Fig. 15 is a bottom view illustrating the fixation element multi is tsionaljnogo type;

Fig. 16 is a top view illustrating the charge LED on which the reflective sheet Board provided before installation of the lenses of the lens;

Fig. 17 is a view in transverse section illustrating the LED unit, taken along the line xvii-xvii in Fig. 7 and 8;

Fig. 18 is a view in transverse section illustrating the LED array according to the first modification of the first variant implementation, taken along the Y axis direction;

Fig. 19 is a view in transverse section illustrating the LED array according to the second variant of implementation of the present invention, taken along the Y axis direction;

Fig. 20 is a view in transverse section illustrating the LED unit, taken along the line xx-xx in Fig. 19;

Fig. 21 is a view in transverse section illustrating the LED array according to the first modification of the second variant implementation, taken along the Y axis direction;

Fig. 22 is a view in transverse section illustrating the LED unit, taken along the line xxii-xxii in Fig. 21;

Fig. 23 is a view in transverse section illustrating the LED array according to the second modification of the second variant implementation, taken along the Y axis direction;

Fig. 24 is a view in transverse section illustrating the LED unit, taken along the line xxiv-xxiv in Fig. 21;

Fig. 25 is a view in transverse section illustrating the LED array according to the third variant of implementation of the present invention, taken along the Y axis direction;

Phi is. 26 is a view in transverse section illustrating the illumination device according to the fourth variant of implementation of the present invention, taken along the Y axis direction;

Fig. 27 is a view in transverse section illustrating the LED array according to the fifth variant of implementation of the present invention, taken along the Y axis direction;

Fig. 28 is a view in transverse section illustrating the LED array according to the first modification of the fifth variant of the implement taken along the Y axis direction; and

Fig. 29 is a view in transverse section illustrating the LED array before installing the lenses of the lens at him, taken along the Y axis direction;

The BEST OPTION of carrying out the INVENTION

<First an implementation option>

The first variant of implementation of the present invention will be described with reference to Fig. 1-17. In the present embodiment, will be explained liquid crystal device 10 of the display. The X-axis, Y-axis and Z-axis are described on part drawings, and the direction of each axis direction corresponds to the direction described in each drawing. The upper side in Fig. 4 and 5 corresponds to the front surface, and the lower side in Fig. 4 and 5 corresponds to the back surface.

As is illustrated in Fig. 1, the television receiver TV according to this variant implementation includes idcore allicance device 10 display front and rear compartments Ca and Cb, which accommodate the liquid crystal device 10 display between them, the source of P supply, a tuner T and a stand S. Taken as a whole form the liquid crystal device 10 of the display (display device) is a landscape rectangular. The liquid crystal device 10 of the display mounted in the housing in a vertical position. As is illustrated in Fig. 2, the liquid crystal device 10 display includes a liquid crystal panel 11 as a panel 11 and display unit 12 of the backlight (lighting device) as an external light source. The liquid crystal panel 11 and the device 12 of the backlight as a part of the held-shaped frame bezel 13 and the like. In the present embodiment, the size of the field display is set to 42 inches and the aspect ratio is set to 16:9.

Then will be described liquid crystal panel 11 and the device 12 of the backlight included in the liquid crystal device 10 of the display. The liquid crystal panel 11 (a display panel) is formed in a rectangular shape in the top view and is configured from a condition to a pair of transparent glass substrates were bonded together with a predetermined gap between them, and liquid crystal was sealed between the glass substrates. On one of the glass substrates, is provided for switching components (for example, TFT (thin film transistors)connected to istokov lines and gate lines that are perpendicular to each other, pixel electrodes connected to the switching components, and the alignment film, and the like. On the other substrate, are provided color filters having color sections such as the color sections R (red), G (green) and B (blue)arranged in a predefined pattern, protivoelektrodom and the alignment film, and the like. Polarizing plates attached to outer surfaces of the substrates.

The device 12 of the backlight will be explained in detail. As is illustrated in Fig. 2, the device 12 of the backlight includes a chassis 14, a set of 15 optical sheets (diffuser 15a (light diffusing member) and a plurality of optical sheets 15b, which is located between the diffuser 15a and the liquid crystal panel 11), the frame 16 and the reflective sheet 21. The chassis 14 has an essentially box-like shape and has an opening 14b on the side of the output light (the side of the liquid crystal panel 11). Set of 15 optical sheet is provided so as to cover the opening 14b of the chassis 14. Frame 16 provided along the outer edges of the chassis 14 that fixes the outer edge of the dial 15 of the optical sheets, the C condition to the outer edge was inserted between the frame 16 and the chassis 14. The reflective sheet 21 reflects light in the chassis 14 side 15 of the optical element. Moreover, the block U LED (light source unit), which includes the LEDs 17 (light emitting diodes), which are a source of light arranged in the chassis 14. The elements 20 provided for fixing the fixing unit U LED to the chassis 14. In the device 12 of the backlight, side light output device 12 of the backlight is the side closer to the diffuser 15a than the block U LED (front side surface). In the following, will be explained each component of the device 12 of the backlight.

The chassis 14 is made of metal. As is illustrated in Fig. 3 through 5, the chassis 14 includes a rectangular bottom plate 14a, similar to the liquid crystal panel 11, side plates 14c, each of which rises from the outer edge of the corresponding side of the bottom plate 14a, and the receiving plate 14d, stretching out from the rising edge of each of the side plates 14c. Taken as a whole form the chassis 14 is essentially a hollow box shape of a hollow plate)that is open toward the front surface. The longest side of the chassis 14 corresponds to the direction of the X axis (horizontal direction), and its short side corresponds to the Y axis direction (vertical direction). The frame 16 and the optical element 15, which will be described later, can be placed on primn the th plate 14c of the chassis 14 from the front surface. The frame 16 is attached to each receiving plate 14c screws. Mounting holes 14c, which are through-holes formed in the bottom plate 14a of the chassis 14, to accept the fixation. Many of the mounting holes 14e formed scattered on the bottom plate 14a corresponding to the installation positions of the elements 20 of the commit.

As is illustrated in Fig. 2, the optical element 15 is formed rectangular landscape, with a top that is similar to the liquid crystal panel 11 and the chassis 14. As is illustrated in Fig. 4 and 5, the outer edge of the optical element 15 is placed on the receiving plate 14d so as to cover the opening 14b of the chassis 14, and is provided between the liquid crystal panel 11 and the block U LED. The optical element 15 includes a diffuser 15a and the optical sheet 15b. The diffuser 15a is provided on the back surface (the side of the unit U LED, the side opposite from the side of light output), and the optical sheet 15b is provided on the front surface side of the liquid crystal panel 11, the output side of light). The diffuser 15a includes an element substrate, having a thickness and is made of essentially transparent synthetic resin and light-diffusing particles dispersed in the base. The diffuser 15a has a function for light scattering is a, which extends through it. The optical sheet 15b is formed by a sheet having a thickness smaller than the diffuser 15a, and includes two laminated layers (Fig. 9). Specific optical sheet 15b may include a diffuser sheet, a lens sheet, a polarizing sheet of the reflective type, and any one of them can be selected for use.

As is illustrated in Fig. 2, the frame 16 is formed in the shape of a frame along the outer peripheral parts of the liquid crystal panel 11 and the optical element 15. The frame 16 and each receiving plate 14d hold the outer peripheral part of the optical element 15 between them (Fig. 4 and 5). Frame 16 receives the rear surface of the outer peripheral part of the liquid crystal panel 11 and the frame 16 and the frame 13, which is provided on the front surface of liquid crystal panel 11 is fixed outer peripheral part of the liquid crystal panel 11 between them (Fig. 4 and 5).

The reflective sheet 21 includes a reflective sheet 22 of the chassis (the reflective element of the chassis) and the reflective sheet 23 Board (the reflective element). The reflective sheet 22 covers almost the entire inner surface of the chassis 14. The reflective sheet 23 independent Board covers each charge 18 LED. The reflective sheet 23 Board is a component unit U LED that will be is explained in detail later. The reflective sheet 22 of the chassis will be explained in detail.

The reflective sheet 22 of the chassis is made from a synthetic polymer and has a surface having white color that provides excellent light reflectivity. As is illustrated in Fig. 3, the reflective sheet 22 of the chassis extends along the inner surface of the chassis 14. Almost the whole area of the middle part, extending along the bottom plate 14a of the chassis 14, is the main body 22a. Holes 22b of the mounting of the lenses, which are through-holes formed in the main body 22a of the conditions to the lens 19 of the lens mount through them. The lens 19 of the diffuser is provided in the block U LED in the chassis 14. Holes 22b of the mounting of lenses formed in a matrix so as to correspond to the layout of the unit U, the LED and the lens 19 of the diffuser. As is illustrated in Fig. 6, each hole 22b of the mounting of the lens is formed in a circular shape as viewed from above, and has a diameter greater than the lens 19 of the diffuser. Accordingly, when the layout of the reflective sheet 22 of the chassis in the chassis 14, each lens 19 of the diffuser can reliably be mounted through each hole 22b of the mounting of the lens, even if there are errors in size. As is illustrated in Fig. 3, the reflective sheet 22 of the chassis covers areas between adjacent lens 19 of the diffuser and the outer peripher inye of the chassis 14. Therefore, the reflective sheet 22 chassis reflects light, aiming at areas on the side of the optical element 15. As is illustrated in Fig. 4 and 5, the outer peripheral portion of the reflective sheet 22 of the chassis is raised so as to cover the side plates 14c and the receiving plate 14d of the chassis 14, portions of the reflective sheet 22 chassis, placed on the receiving plates 14d inserted between the chassis 14 and the optical element 15. The area of the reflective sheet 22 of the chassis, connecting the main body 22a and each of the parts placed on the receiving plates 14d, is italicized.

Then, will be explained in detail block U LED. Block U LED includes LED 17 payment 18 LED (charge of the light source), on which the LEDs 17, the lens 19 of the lens (optical component), mounted on the Board 18, the LED corresponding to each LED, and the reflective sheet 23 Board (the reflective element). Each component unit U LED will be explained in detail.

The LED 17 is a point light source (light source)formed in a dot shape in the top view. As is illustrated in Fig. 7, 8 and 10, the LED is configured by sealing crystal LED polymeric material cost base, which is attached to the circuit Board 18 LED. Crystal LED, which is installed on Board of the Foundation, has one main wave of the light emission, and more exactly, use the : crystal LED, which emits a single color of blue. On the other hand, the fluorescent material dispersed in the polymeric material, which seals the crystal LED in it. Fluorescently material converts blue light emitted from a crystal LED, white light. This gives the LED 17 can emit white light. The LED 17 is the top LED type, which has a surface 17a of the light emission surface opposite from the mounting surface, which must be installed on the card 18 LED (surface, which is facing the side of the front surface). Light axis LA of the light emitted from the LED 17 is essentially coincides with the Z axis direction (the direction perpendicular to the surface of the main plate of the liquid crystal panel 11 and the optical member 15). The light emitted from the LED 17 is distributed three-dimensional image around the light axis LA within a specified angular range, and its direction is higher than the lamps are cold cathode. Namely, the angular distribution of the LED 17 show a tendency that the intensity of radiation of the LED 17 is considerably high along the light axis LA and sharply decreases as we increase the angle relative to the light axis LA.

As is illustrated in Fig. 10, the card 18 LEDs formed on the base plate, having pryamougolnogo, as for the top view, and fee 18 LED housed in the chassis 14 extending along the bottom plate 14a of the conditions to the direction of the long side of the card LED in the direction of X-axis and the direction of its short side coincides with the direction of the Y axis (Fig. 3). Plate base Board 18 LED made of metal, such as aluminum material, like the chassis 14, and the pattern wiring made of a metal film such as copper foil formed on the surface of the base plate through an insulating layer. Insulating material such as ceramics, can be used to plate the base Board 18 LED. Constructed above the LEDs 17 are mounted on the surface plate base Board 18 LED, which is drawn to the side of the front surface (which is converted to the optical element 15, as illustrated in Fig. 7, 8 and 10. The LEDs 17 are arranged linearly along the direction of the long side (X axis direction) of the card 18 LED, and the LED 17 is attached sequentially to each other by pattern wiring formed on the circuit Board 18 LED. Intervals composition between the adjacent LEDs 17 is essentially constant, and the LEDs 17 are arranged at equal intervals. Fee 18 LED configured sites link LED on each of them, the LEDs 17 are arranged separately, and part of the connection phase is in the layout, which connects the parts of the layout, which connect adjacent sections of the layout of the LED. Part 18a of the connector is provided on each edge of the Board 18 LED in the long side direction, and the portion 18a of the connector corresponds to the part of the Assembly of the connector.

The lens 19 of the diffuser is made from a synthetic polymer (such as polycarbonate or acrylate), which is essentially transparent (has a high transmittance) and has a refractive index higher than air. As is illustrated in Fig. 7, 8 and 11, the lens 19 of the lens has a predetermined thickness and has a body 19a lenses formed essentially in a circular shape as viewed from above, and the lens 19 of the diffuser is installed on the circuit Board 18 LED, so as to cover each LED 17 separately from the front surface, and covers the LED 17 in the top view. The lens 19 of the lens is directed to the surface 17a of the light emission of the LED 17 and diffuses the light emitted from the surface 17a of the light emission and having a high orientation, and outputs the diffused light from it. The lens 19 of the lens is a kind of light-diffusing component. Namely, light emitted from the LED 17 reduces its focus, spreading through the lens 19 of the lens, and therefore, even if the distance between the adjacent LEDs 17 is large, the area between the adjacent LEDs 17 less is likely to be recognized as dark areas. Accordingly, the number of LEDs 17 that are to be compiled, may be reduced.

The lens 19 of the lens and the LEDs 17 are arranged essentially concentrically on the Board 18, the LED in the top view. The lens 19 of the diffuser has a diameter sufficiently greater than the LED 17, and the diameter of the lens 19 of the diffuser is greater than the size of the short side (the size of the Y axis direction) of the card 18 LED, and less than the size of the long side (size X-direction) of the card 18 LED. Therefore, each edge side of the lens 19 of the diffuser in the direction of the Y-axis extends out to a certain size from the Board 18 LED in the direction of the y axis. namely, the lens 19 of the lens overlaps each regional site Board 18 LED in the direction of the long sides (outer edges located on each edge in the Y axis direction) in the top view. The size of the short side of the card 18 LEDs is smaller than the diameter of the lens 19 of the diffuser. Fee 18 LED formed to have a minimum size in order to have the lens 19 of the diffuser on it (more accurately, which gives the possibility of installing each mounting part 19a). This reduces the cost of materials for Board 18 LED.

The lens 19 of the lens includes a surface 19b of the input light and the surface 19c of the light output. The surface 19 of the input light is converted to the side of the rear surface and is also clicks the seal to the LED Board 17 and 18 LED, and the light from the LED 17 penetrates into the surface 19b of the input light. Surface 19c of the light output is drawn to the side of the front surface and is directed to the optical element 15. As is illustrated in Fig. 7 and 8, the surface 19b of the input light is formed to be parallel to the plate surface of the Board 18 LEDs in General (the direction of the X axis and the Y axis direction). The recess 19d side of the entrance of the light generated in part (middle part)that overlaps the LED 17 to form a slanted surface. The recess 19 of the input light has an essentially conical shape, and the recess 19 of the input light and the LED 17 is installed concentrically. The recess 19 on the input side of light opened on the surface 19b of the input light, which is facing toward the back surface and the LED 17. The recess 19 on the input side of light has a diameter that is the largest in the front-end part of the opening and larger than the diameter of the LED 17. The diameter of the recess 19d of the input light decreases in a continuous and gradual manner as is closer to the side of the front surface and is the smallest at the end on the side of the front surface. The recess 19d side of the light entrance has a cross section essentially in the shape of an inverted V and has an inclined peripheral surface which is inclined relative to the direction of the z axis Nocloneevent so inclined, that edge portion of the recess 19d side of the entrance of light intersects the light axis LA of the light emitted from the LED 17. Therefore, light emitted from the LED 17 in the recess 19d input light enters the lens 19 of the lens of the inclined surface. Light emitted from the LED 17, enters the lens 19 of the diffuser, as we break the inclined surface at an angle of inclination of the inclined surface relative to the light axis LA, that is, wide angle, and goes to sit far from the center.

The installation portion 19e is provided on the surface 19b of the light entering the housing 19a of the lens so as to be farther outward from the recess 19d side of the entrance of light in the radial direction, i.e. away from the LED 17, as viewed from above. As is illustrated in Fig. 7 and 8, the mounting portion 19e protrude toward the side of the Board 18 LED, so as to maintain the lens 19 of the lens, which must be installed on the card 18 LED. Each mounting portion 19e is formed essentially in columnar form (having a round cross-section)having essentially a constant diameter throughout the length. As is illustrated in Fig. 17, each mounting portion 19e is formed in a dot shape, and spread over the surface at a surface 19b of the input light. More precisely, the three set frequent 19e are provided on the sites is poverhnosti 19b of the input light, each of which is closer to the outer peripheral edge surface 19b of the input light from the recess 19d input light (LED 17). Three mounting portion 19e laid out, from the condition that the line connecting the three mounting portion 19e, forming essentially a right angle in the top view. Namely, three mounting portion 19e is arranged to have an angular spacing of 120 degrees, and to have equal angular intervals on the surface area at the surface 19b of the light entering the housing 19a lenses. Installation parts 19e are arranged with equal intervals to be equal to the distance between adjacent mounting portions 19e, and the distance between each installation part 19e and LED 17 (the center of the lens 19 of the lens) is equal. Mounting portion 19e, which is located on the lower side in Fig. 17, adapted to overlap the outer edge of the long side of the card 18 and the LED in the top view. The other two mounting portion 19e is arranged to be on the inner side from the outer edge of the long side of the card 18 LED. Namely, each of the mounting portions 19e, which are arranged with equal angular intervals, arranged to have the maximum distance from the LED 17. The outer end of each mounting portion 19e is attached to the Board LED by glue or the like. As is illustrated in Fig. 7 and 8, the body 19a of the lens attached to the circuit Board is 18 LED through the mounting portion 19e, in order to support remote (raised) from the Board 18 LED towards the side of the front surface to the amount of protrusion of the installation parts 19e. This provides a clearance (a clearance space between the surface 19b of the input light and the printed circuit Board 18 LED (reflective sheet 23 Board). The light from the external space from the lens 19 of the diffuser in the top view given the opportunity to penetrate into the gap. In the state in which the lens 19 of the diffuser is installed on the card 18 LED, the outer end portion of the LED 17, which is exposed from the Board 18 LED enters into the recess 19d side of the entrance of light.

Surface 19c of the light output housing 19a lenses formed on a flat spherical surface. Accordingly, the light emerges from the lens 19 of the lens, being refracted at a large angle to the wider surface of the outer layer of air, in order to go to be away from the centre. The recess 19f output side of the light generated in part (middle part) of the surface 19c of the light output that overlaps the LED 17 in the top view. The recess 19f side of the output light formed in a substantially conical shape, from the condition that the peripheral surface is formed flat spherical surface, decreasing toward the center. The angle formed between the light axis LA of the light emitted from the LED 17, and the tangent to periphery the th surface of the recess 19f side of the light output, is relatively larger than the angle formed between the light axis LA and the inclined surface of the recess 19d side of the entrance light. On the surface 19c of the light output, which covers the LED 17 in the top view, the amount of light from the LED 17 is extremely high, and the brightness is locally high. The recess 19f side of the output light formed on the surface 19c of the light output and most of the rays of light emitted from the LED 17, is refracted at a large angle to be produced from it, or a part of the rays of light emitted from the LED 17 is reflected to the side of the Board 18 LED. Accordingly, suppressed, so that the brightness of the surface 19c of the light output, which covers the LED 17, was locally high, and the unevenness of brightness should be less likely.

The reflective sheet 23 Board made of synthetic resin and has a surface having white color that provides excellent light reflectivity. As is illustrated in Fig. 11, the reflective sheet 23 of the card along the card 18 LED and has essentially the same external shape as the card 18 LED, to be formed in a rectangular shape in the top view. As is illustrated in Fig. 7 and 8, the reflective sheet 23 Board arranged to cover the surface of the front side of the card 18 LED, that is, the installation surface, where us is the Plac CE LED 17, in order to cover almost its entire surface. As is illustrated in Fig. 7 and 8, the reflective sheet 23 Board provided between the lens 19 of the lens and the adapter 18 LED and is facing surface 19b of the input light (surface on the side of the LED 17) of the lens 19 of the diffuser. Therefore, the reflective sheet 23 Board provided in the space holes 22b of the mounting of the lens in the reflective sheet 22 of the chassis, which is blocked by the reflective sheet 23 Board on the side of its front surface in the top view. Accordingly, light that penetrates into the hole 22b of the mounting of the lens, is reflected by the reflective sheet 23 Board on the lens 19 of the diffuser. A gap is provided between the reflective sheet 23 Board and surface 19b of the light entering the lens 19 of the diffuser, which raised mounting portions 19e. The light emitted from the LED 17 and directed to the lens 19 of the diffuser surface 19b of the input light), the light reflected by the lens 19 of the lens and returned to the side of the Board 18 LED, and the light that is reflected from the reflective sheet 23 Board and re-directed towards the lens 19 of the lens crosses the gap. The number of such light tends to increase as is closer to the LEDs 17 (light source) in the top view, and wane as is farther away from the LED 17.

As is illustrated in Fig. 11, the light reflecting sheet 23 PLA is s is the size of a long side, essentially the same as the card 18 LED, and has a size of short side greater than the fee of 18 LEDs. Namely, the reflective sheet 23 of the card is greater than the fee 18 LED in the direction of the Y-axis, as viewed from above, and each edge of the long side of the reflective sheet 23 card stands out in the Y axis direction from each edge of the long side of the card 18 LEDs (each of the long edges of the long side of the card 18 LEDs, which are provided on opposite sides). More precisely, the size of the short side of the reflective sheet 23 of the card is greater than the diameter of the lens 19 of the lens and the diameter of the hole 22b of the mounting of the lens reflective sheet 22 of the chassis, as illustrated in Fig. 6 and 8. Namely, the reflective sheet 23 Board provided on essentially the entire area of the card 18 LED, which is turned towards the lens 19 of the lens, and the reflective sheet 23 Board provided on essentially the entire area of the card 18 LED, which is located within the holes 22b of the mounting of the lens, as for the top view (including land Board 18 LED between the lens 19 of the lens and the opening 22b of the mounting of the lens), and the reflective sheet 23 of the card is provided to overlap the edge portion of the hole 22b of the mounting of the lens. Therefore, a large part of the light reflected by the lens 19 of the lens and returned on Board 18 LED, and the light directed the th on the hole 22b of the mounting of the lens from the external space of the lens 19 of the diffuser in the top view, is directed to the lens 19 of the lens reflective sheet 23 Board without any leakage. This improves the light utilization efficiency and improves the brightness. In other words, sufficient brightness is obtained by reducing the number of LEDs 17 and the reduction of cost. Edge portion of the hole 22b of the mounting of the lens reflective sheet 22 chassis overlaps the reflective sheet 23 Board on the side of the front surface. Therefore, the reflective sheet 22 of the chassis and the reflective sheet 23 Board continuously arranged on a flat surface without any gap within the chassis 14 and the chassis 14 or the Board, may 18 LED not open on the side of the front surface of the hole 22b of the mounting of the lens. Therefore, the light in the chassis 14 is effectively reflected to the optical element 15, and the brightness is effectively improved.

As is illustrated in Fig. 16, the hole 23a of the mounting of the LED is formed on the area of the reflective sheet 23 Board that overlaps each LED 17 on the circuit Board 18 and the LED in the top view. Each LED 17 is mounted through the hole 23a of the mounting of the LED. Holes 23a of the mounting of the LED arranged on the reflective sheet 23 Board with spacing layout, the same as the LED 17. The diameter of each hole 23a of the mounting of the LED is greater than the LED 17, and smaller than the holes 22b of the mounting of the lens reflective sheet 22 of the chassis and the lens 19 of the diffuser. Resp is rste 23b installation installation part formed in the reflective sheet 23 Board corresponding mounting portions 19e. Holes 23b installation installation parts are through-hole, and the mounting portion 19e is mounted through each hole 23b of the mounting installation section. Each hole 23b installation installation part formed in a substantially round shape in the top view, so as to approach the outer profile mounting holes 19e. The diameter of each hole 23b installation installation part is slightly larger than the mounting portion 19e. Therefore, the clearance C1 is provided between the periphery of the hole 23b installation installation part and the periphery of the mounting portion 19e (Fig. 7, 8 and 17). Set of three holes 23b installation part formed in the reflective sheet 23 Board to surround each hole 23a of the mounting of the LED. Each of the three holes 23b installation installation part formed to have an equal distance from the hole 23a of the mounting of the LED in the middle part, and three holes 23a installation installation part formed with equal angular intervals of approximately 120 degrees. The layout of the holes 23b installation installation part is similar to that of the mounting portions 19e lens 19 of the diffuser and the details will not be explained. The reflective sheet 23 boards can be configured with many others LED reflective areas (surrounding the lens of the lens reflecting areas)that surround each LED 17, and m is Oresta connecting parts, each of which connects adjacent surrounding the LED reflecting areas.

As is illustrated in Fig. 3, many blocks U LED, comprising the above components are arranged to be parallel to each other in the X direction and in the Y axis direction within the chassis 14, the condition that they are aligned in the direction of the long side direction and short side. Namely, the blocks U LED Board 18 LEDs and the LEDs 17 mounted on them) are arranged by rows and columns (matrix) within chassis 14. The X direction (the long side direction of the chassis 14 and the circuit Board 18 LED) corresponds to the line direction, and the Y axis direction (the direction of the short side of the chassis 14 and the circuit Board 18 LED) corresponds to the direction of the column. More precisely, three blocks U LED are arranged parallel to each other in the X direction within the chassis 14 and nine blocks of LEDs arranged in parallel to each other in the Y axis direction, and only twenty-seven blocks U LED are arranged parallel to each other in the chassis 14. In the present embodiment, two types of circuit boards 18 LEDs having different size of the long side and a different number of LEDs 17 mounted on them, are used to block U LED. More precisely, the card 18 LED includes type with six mounted LED type with five mounted LED. Fee 18 LED type with six installed LED is what has LED, installed on it and has a relatively large size of the long side. Fee 18 LED type with five installed LED has five LEDs installed on it and has a relatively small size of the long side. Fee 18 LED type with six set of LEDs arranged on each end section of the chassis 14 in the X direction, and the card 18 LED type with five set of LEDs arranged in the middle part of the chassis in the direction of the axis X. Board 18 LEDs, which are arranged in the X direction to form a line, electrically connected to each other by connection of adjacent parts 18a of the connector through the installation. Part 18a of the connector located on the ends of the chassis 14 in the X direction, is electrically connected to an external control circuit (not illustrated). Accordingly, the LEDs 17 arranged on each of the circuit boards 18 LEDs, which are arranged to form a row, are connected in series, and switching on and off the LEDs 17 included in a single line cards 18 LED can be controlled together by a single control circuit. This achieves a low cost. Board 18 LEDs having different size of the long side and a different number of LEDs 17 mounted on them, have the same size of the short side and the same intervals composition LED 17.

Thus, many types of circuit boards 18 LEDs having different dimensions length article the Rhone and different number of LEDs 17, installed on them, ready to be used by combining properly the different kinds of cards 18 LED. Accordingly, there can be obtained the following useful results. In the case of production of many types of liquid crystal devices 10 display having different screen sizes, is effective to determine whether or not each type of circuit Board 18 LED, and change the number of cards 18 LEDs for each species according to each screen size. In comparison with a case in which the card LED, with the size of the long side, same as chassis 14, which is designed exclusively for each screen size, are prepared for each screen size, type boards 18 LEDs, which are necessary for the production of many types of liquid crystal devices 10 display having different screen sizes, reduced, and this reduces the cost of production. In addition to the two types of circuit boards 18 LED Board 18 LED type with five installed the LED Board 18 LED type with six installed LED), can be used fee 18 LED type with eight mounted LED with eight LEDs 17 that are installed on it. Three types of circuit boards 18 LED can properly be combined to be used for light manufacturing liquid crystal device 10 display with different the s size 26-inch, 32 inch, 37 inch, 40 inch, 42 inch, 46-inch, 52-inch and 65-inch, low cost.

Then, there will be explained the elements 20 of the commit that fixed block U LED in the established state. The fixing element 20 includes an element 20B fixing multi type and element 20A latching type with a single function. Element 20B fixing multi-type has a locking function for locking boards 18 LED and support function to support the optical element 15. Element 20A latching type with single function does not have the support element, but has a fixation element In the following description, item 20A latching type with single function differs from element 20B fixing multi-type by adding "A" to the symbols representing the components relating to the element 20A latching type with a single function, and adding "B" to the symbols representing the components relating to the element 20B commit multifunction type. Nothing is added to the characters, if you do not want to distinguish one from the other.

Will explain the layout of the elements 20 of the fixing chassis 14. As is illustrated in Fig. 3, the set of elements 20 commit arranged parallel to each other on the surface area of the bottom plate 14a of the chassis 14. More precisely, the elements 20 commit arranged on the lower PLA is Tina 14a in rows and columns (in a matrix). The X direction (the long side direction of the chassis 14 and the circuit Board 18 LED) corresponds to the line direction, and the Y axis direction (the direction of the short side of the chassis 14 and the circuit Board 18 LED) corresponds to the direction of the column. Each fixation element 20 is arranged between adjacent lens diffuser 19 (LEDs 17)in order to cover cost 18 LED on the top view. Therefore, the elements 20 commit arranged in a similar way as the lens 19 of the lens and the LED 17. Each fixation element 20 is arranged between adjacent lens diffuser 19 (LEDs 17) on the Board 18 LED. Therefore, the lens 19 of the lens (LED 17) and the fixing element 20 are alternately arranged in the direction of the axis X. More precisely, four fixing element 20 arranged on each Board 18 LED.

Among the elements 20 of the fixing, which are arranged in the chassis 14, the two fixation element 20 are elements 20B fixing multi-type, and other elements 20 of fixation are elements 20A latching type with a single function, as illustrated in Fig. 3. Each of the two elements 20B fixing multi-type arranged in the middle part in the direction of the short side of the chassis 14 and closer to the middle part in the long side direction from the outer edge. Elements 20B commit multifunctional type arranged to be placed in the middle of the middle of the three boards 18 LED to the that are arranged in the X direction, and to be arranged symmetrically on each side of the middle Board 18 LED.

As discussed specific design element 20 engages. Two types of elements 20 commits are for the most part, the General design, and General design will be explained first. The fixing element 20 made of a synthetic polymer, such as polycarbonate, and has a surface having white color that provides excellent light reflectivity. The fixing element 20 as a whole is formed in a substantially circular shape as viewed from above. As is illustrated in Fig. 9, the fixing element 20 includes a main body 24 and the mounting portion 25. The main body 24 is formed along the bottom plate 14a of the chassis 14 and the surface of the plate Board 18 LED. The mounting portion 25 protrudes from the main body 24 toward the rear surface or toward the side of the chassis 14 to be attached to the chassis 14. Each fixation element 20 is formed to be almost symmetrically with respect to the Central axis, which corresponds to the direction of the z axis.

As is illustrated in Fig. 12-15, the main body 24 is formed in a substantially round shape in the top view and is formed essentially of a flat plate along the X axis direction and y axis direction As illustrated in Fig. 6, the main building is 24 has a diameter, essentially equal to the size of the short side (size Y-axis) circuit 18 LED. The main body 24 is set to a position overlying the charge 18 LEDs in the top view in order to capture cost 18 LED from the bottom plate 14a of the chassis 14 between them. The main body 24 is set to capture cost 18 LED to the chassis 14 after reflection sheets 22, 23 are mounted on the side of the front surface of the Board 18 LED. Therefore, the reflection sheets 22, 23 are held together with the card 18 LED between the main body 24 and the bottom plate 14a (Fig. 9). The diameter of the main body 24 is smaller than the distance (interval link) between adjacent lens diffuser 19 (LEDs 17) in the direction of the axis X. Accordingly, the main body 24 is provided on the plot Board 18 LED between adjacent lens diffuser 19 (LEDs 17) in the direction of the axis X, that is, in the light of the card 18 LED. Therefore, the main body 24 does not overlap the LED 17 in the top view. The main body 24 does not interfere with the light emitted from the LED 17. In the present embodiment, a sufficient distance is provided between the LED 17 due to the lens 19 of the diffuser. Each fixation element 20 is provided in the space formed by the distance between the LED 17, and the fixing element 20 secures the card 18 LED.

As is illustrated in Fig. 9, the mounting part 25 is mounted across the installation hole 14c, which is formed in the bottom plate 14a of the chassis 14, corresponding to the installation position of the fixing element 20, and move the bottom plate 14a. In the following, will be explained in the detailed design of the mounting part 25. As is illustrated in Fig. 13 and 15, the mounting portion 25 is provided in the middle part of the main body 24. The mounting portion 25 and the main body 24 is installed concentrically. As is illustrated in Fig. 9, the fixing portion 25 protrudes from the rear surface side of the main body 24 (the surface which faces the chassis 14) toward the back surface, and has a recess 25c on the outer end portion to receive the elastic stoppers 25b. In other words, the fixing portion 25 includes a portion 25a of the base and the elastic stoppers 25b. Part 24a of the base supports of the main body 24 toward the rear surface, and the elastic stoppers 25b are farther from the speaker of the outer end part 25a of the base toward the back surface. Part 25a of the base is formed in a substantially columnar shape and has a diameter smaller than the mounting hole 14e formed in the chassis 14 so as to allow insertion through the mounting hole 14e.

As is illustrated in Fig. 13 and 15, four elastic stopper 25b formed pocrescophobia deepening 25c essentially in the shape of a cross in the top view. As is illustrated in Fig. 9, each elastic stopper 25b formed by the bracket so as to be compressed within the recess 25c his underlying end portion of the protrusion, protruding from a portion 25a of the base, as a reference point, and elastically deformed. Namely, the recess 25c forms a space that provides each elastic stopper 25b able to deform. Each elastic stopper 25b has a retaining portion 25d on its outer surface. The retaining portion 25d is outward, i.e. in the direction opposite from the recess 25c. The retaining portion 25d is further outward from the outer peripheral surface portion 25a of the base. The mounting portion 25 has a diameter at its protruding end (maximum diameter)that is larger than the mounting hole 14e. In other words, the protruding end of the locking portion 25d is located on the outer side from the inner peripheral surface of the mounting hole 14e. Therefore, the retaining portion 25d is now edge part of the mounting hole 14e of the chassis 14, that is, a part of the chassis 14 adjacent to the mounting part 25 from the rear surface. Therefore, if the fixing portion 25 is inserted through the mounting hole 14e of the chassis 14, each elastic stopper 25b is inserted through the mounting hole 14e and elastically zastoporivalis the I edge part of the mounting holes 14e from the rear surface. Accordingly, the fixing element 20 is attached to the chassis 14 in the established state. Mounting holes 14e are formed on the bottom plate 14a of the chassis 14 corresponding mounting portions of the elements 20 commit in order to be in a matrix along the X axis direction and y axis direction.

As is illustrated in Fig. 6, the entire area of the main body 24 having a mounting part 25 covers cost 18 LEDs in the top view, and therefore, the fixing part 25 also covers the cost of 18 LED on the top view. Through hole 18b formed in the circuit Board 18 LED, from the condition to the mounting part 25 mounted through them. As is illustrated in Fig. 10, the through hole 18b formed in the circuit Board 18 LED between the adjacent LEDs 17 (lens 19 of the lens), so as not to overlap the LED 17 (lens 19 of the lens) in the top view. Each of the through holes 18b are formed in a thin elongated shape along the X axis direction in the top view and has an arcuate end portion at each end of the short side. Each through hole 18b is the size of the short side, which simply provides the mounting part 25 is able to be inserted through it, and has the size of the long side, which provides the mounting part 25 is inserted through it with some tolerance. As is illustrated in Fig. 9, each through hole 18b formed what about the over charge 18 LED in the direction of the axis Z, from the condition that the fixing part 25 mounted through cost 18 LED. Therefore, the card 18 and the LED is positioned in the direction of the X axis and the Y axis direction of the fixing part 25, is mounted through the through hole 18b. As is illustrated in Fig. 9 and 11, each of the reflective sheet 22, 23 held between the main body 24 and the printed circuit Board 18 LED, in areas that overlap the through holes 18b in the top view, formed holes 22c, 23c messages in order to communicate with a through hole 18b, and from the condition that the fixing part 25 mounted through them.

Then, as discussed different design between the two kinds of element 20 engages. As is illustrated in Fig. 9, the inclined surface 24a formed on the outer peripheral end surface of the main body 24 of the element 20A latching type with a single function. Each inclined surface 24a decreases from the middle part toward the outer end side of the main body 24. This negates or reduces the step, which may be formed between the main body 24 and the reflective sheet 22 of the chassis. Accordingly, the outer peripheral edge portion of the main body 24 (the boundary area between the main body 24 and the reflective sheet 21 is less likely to be recognized as uneven brightness across optionselect 15. How not illustrated, the inclined surface 24a may be formed on the element 20B commit multifunction type.

As is illustrated in Fig. 9, the element 20B commit multifunctional type includes a base portion 26 which projects from the main body 24 in the direction of the front surface to support the optical member 15 from the rear surface. The abutment portion 26 is formed in a generally conical shape. The support portion 26 has a circular cross-section, taken along the surface of the plate main body 24, and is formed with the beveled form of the conditions to its diameter decreased from the underlying end of the protrusion toward the outer end of the ledge. The abutment portion 26 comes in contact with the diffuser 15a, which is provided on the back surface to be closest to the LED 17 and, accordingly, the diffuser 15a is supported in a predetermined position. The supporting part 26 determines the mutual position between the optical element 15 and the LED 17 in the Z axis direction (in the direction perpendicular to the surface of the optical element 15) in the same condition.

The underlying portion of the protrusion supporting part 26 has an outer diameter that is smaller than the size of the short side of the main body 24 and the size of the short side of the card 18 LED. Namely, supports the flanged portion 26 is formed in a dot shape in the top view, and the supporting part 24 is formed in the shape of a plate which extends in a range wider than the supporting part 26, in the top view. The amount of protrusion of the support part 26 is essentially equal to the distance from the front surface of the main body 24 to the rear surface of the diffuser 15a, which is located in a flat condition along the X axis direction and y axis direction So that the abutment portion 26 comes in contact with the diffuser 15a, which is essentially flat condition. The outer end portion of the protrusion supporting part 26, which is in contact with the diffuser 15a, formed to be round. The abutment portion 26 is only part of the element 20B fixing multi-type, which protrudes from the main body 24 toward the side of the front surface. When installing the element 20B commit multifunctional type in the chassis 14, the worker uses the abutment portion 26 as a working part. This improves the working property of removing and installing the fixing element 20 multi-function type.

As is illustrated in Fig. 14 and 15, the abutment portion 26 is provided essentially in the center of the main body 24. The abutment portion 26 is provided so as to cover the mounting portion 25 provided on the back surface in the top view. More precisely, the support portion 26 and the mounting portion 25 fitted which are concentrically in the top view. With this arrangement, when the setting element 20B commit multifunctional type in the chassis 14, the worker uses the abutment portion 26 as a working part. Accordingly, the worker sees the abutment portion 26, which is open on the side of the front surface, and easily recognize the position of the mounting part 25, which is provided on the back surface and is not visible to the worker. This improves the efficiency of insertion of the fixing part 25 through the openings 22c, 23c messages through hole 18b and mounting hole 14e.

In block U LED, reflective sheet 23 Board provided on the circuit Board 18 LED without the use of fastening means, such as a layer of glue, and is not fastened to the circuit Board 18 LED. If the reflective sheet 23 Board attached to the circuit Board 18 LED, and the reflective sheet 23 Board thermally expands or contracts, buckling or wrinkles may be heavily invoked in areas that are not attached to the circuit Board 18 LED (sections, which protrude from the outer edge of the Board 18 LED) or parts that are attached with a low fastening force, and this may cause local deformation. However, the reflective sheet 23 card that is not attached to the card LED like this variant implementation, does not cause such problems. However, if the reflective sheet 23 Board is not attached to the circuit Board 18 LED, reflective sheet 23 Board may deformer Atisa in the Z axis direction, in order to be close to or detached from the lens 19 of the lens, and therefore, the relative mutual position between the reflective sheet 23 Board and the lens 19 of the diffuser in the direction of the Z axis may not be constant and may be unstable. To deal with this problem, in the present embodiment, is provided by the bounding elements 27, which limit the relative mutual position between the lens 19 of the lens and the reflective sheet 23 Board in the direction of the axis Z. In the following, the restrictive element 27 will be explained in detail.

As is illustrated in Fig. 7 and 8, the guide elements 27 are formed as one piece with the lens 19 of the diffuser. Each of restrictive elements 27 are formed to protrude from the surface 19b of the light entering the main body 19a of the lens (the lens surface 19 of the lens, which is facing the reflective sheet 23) toward the reflective sheet 23 Board so as to be parallel to the mounting portion 19e. The restrictive element 27 has an amount of protrusion from the surface 19b of the input light, which is less than the amount of protrusion of the adjusting portion 19e and less than the distance between the surface 19b of the input light and the reflective sheet 23 of the Board. Therefore, the prescribed gap C2 is provided between the outer end in the stupa restrictive element 27 and the reflective sheet 23 Board and they are not in contact with each other. The reflective sheet 23 card is not pressed restrictive elements 27 in a state in which the reflective sheet 23 Board is flat along the Board 18 LED. Therefore, the reflective sheet 23 Board does not accept a manual voltage limiting elements 27 and has sufficient tolerance for thermal expansion and thermal contraction. The difference between the amount of protrusion of the restrictive element 27 and the distance between the surface 19b of the input light and the reflective sheet 23 of the card is less than the thickness of the reflective sheet 22 of the chassis. Therefore, the outer edge of the ledge bounding element 27 penetrates into the hole 22b of the mounting of the lens in the z direction.

Restrictive elements 27 are provided to have a gap C2 from the reflective sheet 23 of the Board. If the reflective sheet 23 Board moves so as to rise from the Board 18 LED to the side of the front surface, the guide elements 27 are in contact with the reflective sheet 23 Board from the front surface, in order to limit further deformation of the reflective sheet 23 of the Board. In other words, if the reflective sheet 23 Board is deformed so as to be closer to the lens 19 of the lens, the reflective sheet 23 of the card is pressed restrictive elements 27, in order to limit led the rite offset, that was within the range of the clearance C2. This limits the reflective sheet 23 Board from closer to the lens 19 of the diffuser. This keeps the distance between the surface 19b of the light entering the lens 19 of the lens and the reflective sheet 23 Board in the Z axis direction (i.e., the distance in the direction in which the reflective sheet 23 Board regarding approaches and moves away from the lens 19 of the lens)that was prescribed distance or more (the amount of protrusion of the restrictive element 27 or greater). Part of the reflective sheet 23 Board that overlaps the bounding element 27 in the top view, is the contact part 28, which may be in contact with the bounding element 27. Each bounding element 27 is formed on the whole essentially in a spherical shape (round shape in the top view) and has a spherical (curved peripheral surface (the surface which is facing the reflective sheet 23 Board). Therefore, the restrictive element 27 is in point contact with the contact part 28 of the reflective sheet 23 of the Board. This reduces the contact area of the bounding element 27, which is in contact with the reflective sheet 23 Board order was the lowest.

Then, will be explained in detail in the schematic layout of the restrictive elements 27. As is illustrated in Fig. 17, is the very restrictive element 27 is formed essentially in the point form, as for the top view, and many of the restrictive elements 27 are arranged distributed over the surface at a surface 19b of the input light. More precisely, three bounding element 27 provided for in the provisions on the surface 19b of the input light, which are closer to the outer peripheral edge of the recess 19d side of the entrance light (LED 17) like mounting portions 19e. There are three limiting element 27, of the conditions to the line connecting the restrictive elements 27, to form essentially a right angle in the top view. Three restrictive element 27 is provided with equal angular intervals from the condition that they were linked to the surface area at the surface 19b of the light entering the housing 19a lenses with angular intervals of approximately 120 degrees. Restrictive elements 27 are arranged at equal intervals, from the condition that each distance between adjacent bounding elements 27 was equal, and there is an equal distance between each of the bounding element 27 and the LED 17 (the center of the lens 19 of the lens). One of the restrictive elements 27 provided on the upper side in Fig. 17, overlaps the outer edge of the long side of the card 18 LED. Other restrictive elements 27 are provided at positions slightly more than the inner side from the outer long edges is part of the Board 18 LED. Namely, each of the restraining elements 27, which are arranged with equal angular intervals, are arranged so as to have the greatest distance from the LED 17.

Each bounding element 27 is provided to be separated from each mounting portion 19e in the top view on the surface 19b of the input light. Each bounding element 27 and each mounting portion 19e are arranged alternately in the circumferential direction of the lens 19 of the diffuser. More precisely, each bounding element 27 is arranged with an angular interval of approximately 60 degrees with respect to each mounting portion 19e, and the line connecting the restrictive elements 27 and the mounting portion 19e is formed essentially regular octagon in the top view. Each bounding element 27 and each mounting portion 19e is arranged to be facing each other with proslaivaem LED 17 between them. Mounting portion 19e is arranged with an angular interval of 180 degrees with respect to the bounding element 27. The restrictive element 27 is arranged with an angular interval of 180 degrees relative to the mounting portion 19e. The distance between each of the bounding element 27 and each installation part 19e, which are adjacent to each other in the circumferential direction of the lens 19 of the diffuser, is sushestvovanii. Therefore, the guide elements 27 and the mounting portion 19e are arranged at equal intervals. The distance from each of the bounding element 27 to the LED 17 (the center of the lens 19 of the lens) and the distance from each mounting portion 19e to the LED 17 is essentially equal. Therefore, each of the bounding element 27 and each mounting portion 19e are arranged symmetrically in relation to the LED 17. The restrictive element 27 has a diameter essentially the same as the mounting portion 19e. The contact part 28 of the reflective sheet 23 Board provided similar restrictive elements 27 in the top view, and layout of the contact parts 28 will not be explained.

Construction on the present version has been explained above, and explained her work. The liquid crystal panel 11 and the device 12 lights are manufactured separately, and they are going with each other using a frame 13, and the like. Accordingly, the LCD device 10 of the display is made, as illustrated in Fig. 4 and 5. The operation of Assembly during manufacture of the device 12, the backlight will be explained in detail.

In the present embodiment, before Assembly of the parts of the chassis 14, manufactured blocks U LED. In the production of blocks U, LED 17, the reflective sheet 23 Board and the lens 19 of the lens mounted on the blocks U LED. On the Le, as LEDs 17 mounted in predetermined positions on the circuit Board 18 LED, as illustrated in Fig. 10, the reflective sheet 23 of the card is covered on the side of the front surface of the Board 18 LED. At this time, as illustrated in Fig. 16, each LED 17 is mounted through each hole 23a of the mounting LED reflective sheet 23 Board, and each hole 23c of the message it communicates with each through hole 18b. After that, as illustrated in Fig. 11, the lens 19 of the diffuser is mounted on the Board 18 LED, so as to cover each LED 17. At this time, each mounting portion 19e of the lens 19 of the diffuser is mounted through each hole 23b installation installation part of the reflective sheet 23 of the Board and is attached to the circuit Board 18 LED adhesive through the adhesive layer), superimposed on the outer end portion of the mounting portion 19e. Each mounting portion 19e is able to come into contact with each hole 23b installation installation part with them which are facing each other of the peripheral surfaces. Therefore, when installing the lens 19 of the diffuser on the card 18 LED, the position of the lens 19 of the diffuser is defined in two dimensions in the X-axis direction and Y axis direction with respect to the circuit Board 18, the LED and the reflective sheet 23 of the Board. In the installed state of the lens 19 of the lens, the predetermined clearance C1 is provided between which converts the each other of the peripheral surfaces of each mounting portion 19e and every hole 23b of the installation part, as is illustrated in Fig. 17. Accordingly, the block U LED is made with the installation as a part of the LEDs 17, the reflective sheet 23 Board and the lens 19 of the diffuser on the card 18 LED.

In block U LED, as illustrated in Fig. 8, each of the bounding element 27 of the lens 19 of the lens and each of the contact part 28 of the reflective sheet 23 boards provide the clearance C2 between them and are drawn to each other, so as not to be in contact with each other. Therefore, if vibration or shock applied to the blocks U LED during their transportation, and the reflective sheet 23 Board may be deformed to approach the lens 19 of the lens, the guide elements 27 are in contact with the contact parts 28 of the conditions to the reflective sheet 23 Board is not deformed further to get closer to the lens 19 of the diffuser. In addition, the restrictive elements 27 are arranged on the surface of which facing each other of the surfaces of the lens 19 of the lens and the reflective sheet 23 Board distributed with equal angular intervals. Therefore, deformation of the reflective sheet 23 Board effectively limited trim surfaces. This keeps the distance between the surface 19b of the light entering the lens 19 of the lens and the reflective sheet 23 of fees to be prescribed the drug or greater. The above-described operations and results are obtained if the blocks U LED going into the device 12 of the backlight, and if the device 12 of the backlight is collected in the liquid crystal device 10 display.

Then, will be explained the operation of assembling the parts of the chassis 14. Block U LED fits in the chassis 14 through the opening 14b of the front surface and must be arranged in a predetermined position on the bottom plate 14a. At this time, each through hole 18b Board 18 LEDs in each block U LED is arranged to correspond to each mounting hole 14e of the chassis 14, which must communicate with one another. Connecting part 18a of the connector are assembled and joined to each other to create mutual electrical connection between the plates 18 LEDs, which are arranged adjacent to each other in the direction of the axis X. Board 18 LEDs, which are arranged in the X direction is not necessarily connected to the chassis 14, but can be connected outside of the chassis 14. Once assembled all the blocks U LED, reflective sheet 22 of the chassis will be provided in the chassis 14. At this time, each hole 22b of the mounting of the lens reflective sheet 22 of the chassis is located to correspond to each lens of the lens unit U LED for mounting each lens 19 of the lens through the opening 22b of the mounting of the lens (Fig. 3). PEFC is the installation of the reflective sheet 22 of the chassis, the reflective sheet 22 of the chassis covers from the front surface of almost all part of the reflective sheet 23 Board except for the portion that overlaps the lens of the lens, as viewed from above (Fig. 6-8). The whole plot edge of the opening 22b of the mounting of the lens reflective sheet 22 chassis overlaps the front surface of the reflective sheet 23 of the Board. Each hole 22c messages reflective sheet 22 of the chassis corresponds to each hole 23c of the message of the reflective sheet 23 Board, each through-hole 28b Board 18 LED, and each mounting hole 14e of the chassis 14, which must communicate with each other (Fig. 9). After this, you will have to gather the elements 20 of the commit.

To install each of the fixing element 20 in the chassis 14, each fixation element 20 is placed within the chassis 14 from the front surface through the opening 14b, and the fixing portion 25 is inserted through each of the holes 14e, 18b, 22c, 23c. In the process of insertion of the fixing part 25, each elastic stopper 25b is pressed edges of each of the holes 14e, 18b, 22c, 23c, to elastically deform and temporarily compressed into the recess 25c. The mounting portion 25 is inserted into the mounting hole 14e, from the condition that each elastic stopper 25 is passed through the mounting hole 14e, and reached the side of the rear surface of the chassis 14. Then, as support is owano in Fig. 9, each elastic stopper 25b elastically restores its original shape and the retaining portion 25d is now edging part mounting holes 14e from the rear surface. Accordingly, the fixing element 20 is protected from upadyaya with the chassis 14 and is mounted to be mounted on the chassis 14. In this installed state, the card 18 LED and the reflection sheets 22, 23 together inserted between the main body 24 of the fixing element 20 and the bottom plate 14a of the chassis 14.

When installing the fixing element 20 in the chassis 14, the abutment portion 26 of element 20B fixing multi-type is used as the working part. Therefore, when installing the element 20B fixing multi-type chassis 14, a worker holds the supporting portion 26 to operate element 20B commit multifunction type. In this state, the supporting portion 26 and the mounting portion 25 concentrically overlap with each other in the top view. Therefore, the worker can easily recognize the position of the mounting part 25 and seamlessly inserts the fastening part 25 in the mounting hole 14e.

The mounting portion 25 passes through each of the reflection sheets 22, 23 and charge 18 LED, and this prevents the reflection sheets 22, 23 and charge 18 LED from inattentive move in the direction of the X axis and the Y axis direction, and the position of the reflection sheets 22, 23 and PLA is s 18 LEDs can be defined in the same direction. In addition, the fixing portion 25 passes through the mounting hole 14e formed in the chassis 14 so as to mechanically separatist and attached to the chassis 14. Therefore, in comparison with a case in which the fixing portion 25 is attached adhesive mounts easily and inexpensively performed and the fixing element 20 can be easily removed from the chassis 14 in the case of maintenance or disposal.

After that, the optical element 15 is installed in the chassis 14 so as to cover the opening 14b. When installing the optical element 15, the first provides the diffuser 15a, and thereafter, the optical sheet 15b is installed on it. As is illustrated in Fig. 4 and 5, the outer peripheral edge part of the optical element is placed on the receiving plate 14d, and the middle part of the optical element 15 is supported by the supporting part 26 of the element 20B commit multifunction type. After that, the frame 16 is installed in the chassis 14, and the outer peripheral edge part of the optical element 15 is inserted between the frame 16 and the receiving plate 14d, and completes the fabrication of the device 12 of the backlight. When assembling device 12 of the backlight and the liquid crystal panel 11, the liquid crystal panel 11 is placed on the frame 16, and thereafter, the frame 13 is placed on the side of the front surface of zhidkokristal the coy panel and attached with screws. Accordingly, the liquid crystal panel 11 is inserted between the frame 16 and frame 13, and the liquid crystal panel 11 is provided as an integral part of the device 12 of the backlight, and manufacture of liquid crystal display devices 10 is completed.

When using liquid crystal display devices 10 manufactured in this way, each LED 17 provided in the device 12, the backlight flashes for supplying image signals to the liquid crystal panel 11. Accordingly, images are displayed on the surface of the liquid crystal display panel 11. As is illustrated in Fig. 7 and 8, the light emitted from the LEDs 17 that are exposed, first penetrates into the surface 19b of incidence of light of the lens 19 of the diffuser. At this time, most of the rays of light emitted from the LED 17, enters the inclined surface of the recess 19d side of the entrance of light and refracted with a large angle according to the angle of the inclined surface and penetrates into the lens 19 of the diffuser. The light that penetrates the lens 19 of the lens extends through the lens 19 of the lens, and then, out of the surface 19c of the light output. Surface 19c of the output light formed in a substantially flat spherical shape. Therefore, advanced light is refracted with a large angle at the boundary between the surface 19c in the course of light and a layer of outdoor air in and out of the surface 19c of the light output. The recess 19f side of the light output is essentially conical shape formed on the surface 19c of the light output, in which the amount of light from the LED 17 is greatest, and the peripheral surface of the recess 19f side of the output light formed essentially flat spherical surface. Therefore, light can be deflected within a large angle on the peripheral surface of the recess 19f light output and goes out or is reflected on the side of the Board 18 LED. Light returned to the side of the Board 18 LED, is reflected by the reflective sheet 23 Board on the side of the lens 19 of the lens (on the surface 19b of the input light) and re-enters the lens 19 of the lens to be used effectively. Consequently, superior brightness.

The distribution of the light reflected by reflective sheet 23 Board and penetrates into the surface 19b of the light entering the lens 19 of the lens may vary according to the mutual alignment in the Z axis direction between the lens 19 of the lens and the reflective sheet 23 of the Board. More precisely, for example, the reflective sheet 23 of the card can be provided to be inclined with respect to the circuit Board 18, the LED and the lens 19 of the lens, and the distance between the reflective sheet 23 Board and the lens 19 of the lens can be changed within the surface area at the surface 19b of the input light. In this case the e, the efficiency of light entering the light reflected on the reflective sheet 23 Board and penetrating into the surface 19b of the input light can be non-uniform within the surface area at the surface 19b of the input light. Normally, the lens 19 of the optical diffuser is designed, from the condition that the light went out, so as to have a predetermined distribution according penetrating light having a predetermined distribution. Therefore, if the distribution of the penetrating light is changed, the distribution of the outgoing light is also changed, and it may undergo failure in achieving stable optical power. In the present embodiment, the guide elements 27 are provided on the lens 19 of the lens to limit relative position in the Z axis direction between the lens 19 of the lens and the reflective sheet 23 of the Board. Therefore, the distribution of light reflected from the reflective sheet 23 Board and penetrating into the lens 19 of the lens, should change less likely. This stabilizes the distribution of light coming into the lens 19 of the diffuser, and the distribution of light emitted from the lenses of the lens, and consistently achieved the initial optical power. In the present embodiment, the clearance C2 is provided between the limiting elements 27 and the reflective sheet 23 of the Board. This provided yet the possibility of deformation of the reflective sheet 23 Board within the range of the clearance C2. However, tolerance to deformation is quite small and it almost does not cause optical effects in the distribution of light coming into the lens 19 of the lens.

The light emitted from the LED 17, which should be directed at the lens 19 of the diffuser surface 19b of the input light), the light reflected by the lens 19 of the lens and returned to the side of the Board 18 LED light that is reflected from the reflective sheet 23 Board and re-directed towards the lens 19 of the lens, and the like, is circulated in the space of the gap between which is converted to each other by the lens surface 19 of the lens and the reflective sheet 23 of the Board. The number of such rays of light increases as it is closer to the LEDs 17 (light source) in the top view, and decreases as is farther away from the LED 17. Each of the restraining elements 28 and mounting portions 19e, which protrude from the surface 19b of the light entering the lens 19 of the diffuser toward the reflective sheet 23 Board can function as optical barriers for light propagating in the gap. If light hits the bounding element 27 or the installation portion 19e, the light can be deflected to go in the wrong direction and may not be used effectively. In the present embodiment, each of the restraining elements 27 and ustanovocnyj parts 19e is provided, in order to be furthest from the LED 17. Accordingly, each of the restraining elements 27 and mounting portions 19e are located on the parcel on which the amount of the above-described light very little. Accordingly, the guide elements 27 and the mounting portion 19e is less likely to affect the above light. As is illustrated in Fig. 17, each of the restraining elements 27 and mounting portions 19e are provided so as to have an equal distance from the LED 19 and from the condition that one of the limiting elements 27 and one of the mounting portions 19e overlaps the outer edge of the Board 18 LED on the top view. Accordingly, the guide elements 27 and the mounting portion 19e evenly cause optical effects in light of the above, and have a maximum distance from the LED 17. Accordingly, optical effects in light of the above, caused each of the restraining elements 27 and mounting portions 19e are limited to be the least. In addition, the guide elements 27 and the mounting portion 19e are arranged alternately along the direction of the circumference of the lens 19 of the diffuser with equal angular intervals. Therefore, optical effects in light of the above called each of restrictive elements 27 and mounting portions 19e evenly on the surface area at the top of the spine 19b of the input light, and the unevenness of the light must be called less likely. Accordingly, the amount of light penetrating into the surface of the light entering the lens 19 of the diffuser is secured sufficiently, and the light distribution for the most part is uniform. This improves the brightness of light emitted from the lens 19 of the lens and the brightness distribution is uniform.

The light emitted from the LED 17 and having a high directivity, can be dispersed by the lens 19 of the lens at a large angle, and therefore, the distribution of light reaching the optical element 15 within the surface area of the optical element 15 becomes uniform. In other words, due to the layout of the lens 19 of the lens, the area between the adjacent LEDs 17 is less likely to be recognized as a dark area, and therefore, the distance between the LEDs 17 can be increased. This suppresses the unevenness of brightness and reduces the number of assembled LED 17. Reducing the number of LEDs 17 increases the distance between the adjacent LEDs 17. The adjusting element 20 can be arranged in the space formed by the increased distance, and the adjusting element 20 secures the card 18 LED.

When using liquid crystal display devices 10, each of the LEDs 17 included in the device 12 lights, flashes and extinguished, and this mod is no change with the ambient temperature at the device 12 of the backlight. Accordingly, each of the components in the liquid crystal device 10, the display may thermally expand or contract. Each of the reflective sheet 23 Board reflects the light to the surface 19b of the light entering the lens 19 of the lens at the position closest to the LED 18 and the lens 19 of the diffuser. The reflective sheet 23 Board has an important function in the optical design of the device 12 of the backlight. Therefore, if the reflective sheet 23 Board thermally expands or contracts, is the local deformation such as warping or bending, and this can have a significant impact on the optical output device 12 of the backlight. In the present embodiment, as illustrated in Fig. 8, the clearance C2 is provided between the limiting elements 27 of the lens 19 of the lens and the reflective sheet 23 of the card, and they are not in contact with each other. Mechanical stress is not applied with restrictive elements 27 to the reflective sheet 23 of the Board. The clearance C1 is provided between the installation part 19e and hole 23b installation installation part, and no mechanical stress is not caused between them. Therefore, the reflective sheet 23 Board the opportunity to thermally expand and contract to some extent, and accordingly, the local deformation such as warping or bending, IU is it likely to occur in the reflective sheet 23 of the Board. In other words, the reflective sheet 23 Board the opportunity to expand or contract over its entire area, and the entire area of the reflective sheet 23 Board can absorb deflection or distortion that may be caused by expansion or contraction. Therefore, it is guaranteed that the reflective sheet 23 Board should be flat throughout its area, and the local occurrence of deflection or distortion should be called less likely.

As explained above, the block U LED under this option implementation includes LED 17, which is the light source, the lens 19 of the lens, provided to be drawn to the surface 17a of the light emission of the LED 17, and the reflective sheet 23 Board stipulated to be paid to the lens surface 19 of the lens, being drawn to the LED 17 and reflecting the light. Block U LED additionally includes a restrictive element 27, which projects from the lens 19 of the diffuser toward the reflective sheet 23 Board and limits the mutual position between the lens 19 of the lens and the reflective sheet 23 of the Board.

Accordingly, light emitted from the LED 17, passes through the lens 19 of the diffuser, which is drawn to the surface 17a of the light emission and it uses optical effects to light, and light that has passed the optical effects comes from whether the SHL 19 of the diffuser. Some part of the light emitted from the LED 17 can be reflected by the lens 19 of the diffuser and return to the side of the LED 17. Such light is reflected by reflective sheet 23 Board and is back on the side of the lens 19 of the lens to be used effectively. The distribution of light reflected from the reflective sheet 23 Board and penetrating into the lens 19 of the lens may vary according to the relative positioning between the lens of the lens and the reflective sheet 23 of the Board. In the present embodiment, the guide elements 27 protruding from the lens 19 of the diffuser toward the reflective sheet 23 Board, limit the mutual position between the lens 19 of the lens and the reflective sheet 23 of the Board. Therefore, the distribution of light reflected from the reflective sheet Board and penetrating into the lens 19 of the lens, should change less likely, and this stabilizes the distribution of light emitted from the lens 19 of the lens.

Restrictive elements 27 are formed to provide clearance C2 from the reflective sheet 23 of the Board. Accordingly, the guide elements 27 and the reflective sheet 23 Board are not in contact with each other. Therefore, the reflective sheet 23 Board easily expands or contracts due to thermal expansion or thermal contraction, and deformation such as deflection or robienie, less likely to occur in the reflective sheet 23 of the Board. Accordingly, the unevenness is less likely to be invoked in the light reflected by reflective sheet 23 of the Board.

Restrictive elements 27 are arranged dispersed within the surface area which is facing to each other of the surfaces of the lens 19 of the lens and the reflective sheet 23 Board (surface 19b of the input light). Accordingly, the guide elements 27, provided dispersed within the surface area which is facing to each other of the surfaces of the lens 19 of the lens and the reflective sheet 23 Board, effectively reduce the mutual position between the lens 19 of the lens and the reflective sheet 23 of the Board.

Restrictive elements 27 are arranged at equal intervals. Accordingly, the relative positions between the lens 19 of the lens and the reflective sheet 23 Board may be limited to balanced on the surface of which facing each other with the lens surface 19 of the lens and the reflective sheet 23 of the Board. This stabilizes the distribution of light reflected from the reflective sheet 23 Board and penetrating into the lens 19 of the lens.

The LED 17 is a point light source in the top view. Even if the light emitted from the LED 17, has a high directivity, the response passes through the lens 19 of the diffuser, from the condition that the optical effects of reduced orientation was used to the light, and the light coming from the lens 19 of the lens.

Restrictive elements 27 are arranged to be farther from the LED 17 in the top view. Accordingly, the amount of light reflected by the lens 19 of the lens tends to have a distribution so as to be inversely proportional to the distance from the LED 17. Restrictive elements 27 are provided at positions that are further away from the LED 17 and with a relatively small amount of light reflected by the lens 19 of the diffuser. This reduces optical effects caused by the restrictive elements 27, the light reflected by the lens 19 of the diffuser, and the light reflected by reflective sheet 23 of the Board. Accordingly, the light now penetrates into the lens 19 of the lens.

Each of restrictive elements 27 are arranged so as to have an equal distance from the LED 17. Accordingly, the distance between each of the bounding element 27 and the LED 17 is equal, and therefore, the optical effect is called uniformly each of restrictive elements in the light reflected by the lens 19 of the diffuser, and the light reflected by reflective sheet 23 of the Board. Therefore, unevenness is less likely to be invoked in the light penetrating the lens 19 of the lens.

Restrictive elements 27 are provided is as equal angular intervals. Accordingly, the unevenness is less likely to be invoked in the light penetrating the lens 19 of the lens.

The LEDs 17 mounted on the Board 18 LED, and the reflective sheet 23 Board is overlying the surface of the Board 18 LED, which has LED 17. Fee 18 LED has openings 23a of the mounting LED, through which are mounted the LED 17. Accordingly, each of the LEDs 17 mounted on the Board 18 LED, is mounted through the hole 23a of the mounting LED reflective sheet 23 of the card, from the condition that the surface 17a of the light emission was drawn to the lens 19 of the diffuser, and the light effectively penetrated into the lens 19 of the lens.

The restrictive element 27 is provided to cover the outer edge of the Board 18 LED on the top view. Accordingly, the reflective sheet 23 Board inserted between the bounding element 27 and the printed circuit Board 18 LED, in order to effectively limit the mutual position between the lens 19 of the lens and the reflective sheet 23 of the Board. The restrictive element 27 is provided so as to overlap the outer edge of the Board 18 LEDs in the top view, and in order to be furthest from the LED 17. Restrictive elements 27 are less likely to have optical to influence the light reflected by the lens 19 of the diffuser, and the light that is reflected from the reflective sheet 23 of the Board. Therefore, light can efficiently penetrate into the lens 19 Rasse the user.

The reflective sheet 23 Board is larger than the fee 18 LED, in the top view. Fee 18 LED is relatively smaller than the reflective sheet 23 of the card, in the top view. This reduces the cost of materials Board 18 LED. Fee 18 LED reduced in size, and uses reflective sheet 23 Board, larger than fee 18 LED. Accordingly, the light from the lens 19 of the diffuser effectively reflected by the reflective sheet 23 Board on the lens 19 of the lens.

The installation portion 19e is provided on the lens 19 of the diffuser so as to protrude toward the circuit Board 18 LED, and are mounted on PCB 18 LED. The installation portion 19e is provided to be farther from the LED 17 in the top view. Accordingly, the lens 19 of the diffuser is mounted on the Board 18 LED through the installation parts 19e. The installation portion 19e is provided to be distant from the LED 17 in the top view. Therefore, the mounting portion 19e less likely to have optical to influence the light reflected by the lens 19 of the diffuser, and the light that is reflected from the reflective sheet 23 of the Board. Accordingly, the light now penetrates into the lens 19 of the lens.

Holes 23b installation installation part, through which are mounted installation portion 19e is formed in the reflective sheet 23 of the Board. Accordingly, each installation is t, 19e, mounted through the opening 23b installation installation part, in order to determine the relative position of the reflective sheet Board and the lens 19 of the lens in the direction along which are facing each other surfaces.

The clearance C1 is provided between the hole 23b mounting mounting part and the mounting part 19e. Accordingly, thermal expansion or thermal contraction of the reflective sheet 23 Board the opportunity within the range of the clearance C1.

Restrictive elements 27 are formed as an integral part with the lens 19 of the lens and provided to be distant from the mounting portions 19e on the lens 19 of the diffuser. Accordingly, the relative positions between the lens 19 of the lens and the reflective sheet 23 of the card is limited to within a position remote from the mounting portions 19e. If the bounding elements are provided close to the mounting portions 19e on the lens 19 of the lens, the guide elements can be inserted into the holes 23b of the mounting installation section. However, this problem is not caused in the present embodiment, and the limiting function of the restrictive elements 27 are securely performed.

Each bounding element 27 and each mounting portion 19e are arranged alternately in the circumferential direction of the lens 19 receivethe who I am. Accordingly, the mounting portion 19e and restrictive elements 27 are provided preferably dispersed on the surface of which facing each other of the surfaces of the lens 19 of the lens and the reflective sheet 23 of the Board. Therefore, the lens 19 of the lens balanced supported mounting portions 19e and restrictive elements 27 balanced restrict the mutual position between the lens 19 of the lens and the reflective sheet 23 of the Board.

The installation elements 19e and restrictive elements 27 are provided with equal angular intervals. Accordingly, the mounting portion 19e and restrictive elements 27 are provided distributed over the surface which is facing each other of the surfaces of the lens 19 of the lens and the reflective sheet 23 of the Board. Therefore, the limiting function of the restrictive elements 27 and supports the function of the installation parts 19e supporting the lens 19 of the lens, effectively executed.

Each of the mounting portions 19e and each of restrictive elements 27 are provided to be equal to the distance from the LED 17. Accordingly, each mounting portion 19e and every restrictive element 27 has optical effects equally in the light reflected by the lens 19 of the diffuser, and the light reflected otrajatelem the m sheet 23 of the Board. Therefore, unevenness is less likely to occur in the light penetrating the lens 19 of the lens.

The LEDs 17 are arranged at the center of the lens 19 of the diffuser. Accordingly, the optical design of the lens 19 of the lens is inexpensive, and the cost of production of the lens 19 of the lens may be reduced.

The LED 17 is used as a point source of light. This achieves improved brightness and low energy consumption.

The lens 19 of the diffuser, i.e. component of svetorasseivateley, light-scattering, is used as the optical component. Accordingly, light emitted from the LED 17, diffused lens 19 of the lens, i.e., a component of svetorasseivateley, and is discharged from the lens 19 of the diffuser. If the light emitted from the LED 17, has a high directivity, the directivity can be effectively reduced.

Restrictive elements 27 are provided as one unit with the lens 19 of the diffuser. In comparison with a case in which the bounding elements are provided as a part of the plate with reflective sheet 23 fees, production costs may be reduced.

The reflective sheet 23 Board has a contact portion 28, each of which is converted to the bounding element 27 and is in contact with the bounding element 27. Accordingly, contact cha the tee 28, which is converted to the bounding elements 27 are in contact with the bounding elements 27, respectively, of the conditions to the mutual position between the lens 19 of the lens and the reflective sheet 23 Board securely confined.

The restrictive element 27 is formed to have a curved surface, which is facing opposite the component. Accordingly, if the bounding element 27 is in contact with the opposite component, opposite the component easily moves smoothly with respect to the bounding element 27. This provides a reflective sheet 23 Board the ability to thermally expand or contract to a greater degree.

The restrictive element 27 has a spherical surface which is facing the opposite component. If the bounding element 27 is in contact with the opposite component, opposite the component easily moves smoothly with respect to the bounding element 27, and it provides a reflective sheet 23 Board the ability to thermally expand or contract to a greater degree.

The reflective sheet 23 Board is larger than the lens 19 of the diffuser, in the top view. Accordingly, light reflected by the lens 19 raseev the body, can be reflected by reflective sheet 23 Board area larger range. This further improves the light utilization efficiency.

The lens 19 of the diffuser that diffuses the light, is used as an optical lens. Accordingly, light emitted from the LED 17, scatters through and outputted from the lens 19 of the diffuser, and the unevenness is less likely to be called in the coming light.

The device 12 of the backlight according to the present variant implementation includes configured above the block U LED, chassis 14, which accommodates the unit U LED in it, and the reflective sheet 22 of the chassis, which is provided along the inner surface of the chassis 14 and has a hole 22b of the mounting of the lenses through which is mounted the lens 19 of the diffuser. In such a device 12 of the backlight unit U LED limits the unevenness caused in the light emerging from the lens 19 of the lens, and therefore, unevenness is less likely to be invoked in the output light of the device 12 of the backlight. In the device 12 of the backlight, a reflective sheet 23 Board provided on the circuit Board 18 LED, includes the area within the holes 22b of the mounting of the lens in the top view so as to overlap the edge portion of the hole 22b of the mounting of the lens in the top view. Accordingly, light propagating in the space within the hole 22b of the mounting lizzytraining sheet 22 of the chassis, effectively reflected by the reflective sheet 23 Board on the lens 19 of the lens, and this improves the light utilization efficiency.

The liquid crystal device 10, the display includes a device 12 of the backlight and the liquid crystal panel 11, which performs display using light from the device 12 of the backlight. In this liquid crystal device 10 of the display device 12 of the backlight that supplies light to the liquid crystal panel, it is less likely should cause unevenness of the outgoing light. It achieves display having excellent display quality.

As described above, was illustrated by the first variant of implementation of the present invention. However, the present invention is not limited to the above embodiment and, for example, can use the following various modifications. In the following modifications, the same parts and components as in the above variant of implementation, are indicated by the same symbols and will not be explained.

[First modification of the first variant implementation]

The first modification of the first variant of implementation will be explained with reference to Fig. 18. Changed the serving size of the bounding element 27-1.

As is illustrated in Fig. 18, restrictive ale is NT 27-1 has an amount of protrusion from the surface 19b of the light entering the lens 19 of the diffuser, which is essentially equal to the distance between the surface 19b of the input light and the reflective sheet 23 of the Board. The amount of protrusion of the bounding element 27-1 is less than the amount of protrusion of the adjusting portion 19e. The difference between the size of the projection of the bounding element 27-1 and mounting portion 19e is essentially equal to the thickness of the reflective sheet 23 of the Board. Therefore, in the state in which the lens 19 of the diffuser is installed on the card 18 LED, the outer end of the ledge bounding element 27-1 is in contact with the reflective sheet 23 of the card, with no gap between them. That is, the reflective sheet 23 Board inserted between the plate 18 LED and restrictive element 27-1, so as not to move in the direction of the z axis of the Reflective sheet 23 Board becomes close to the lens 19 of the diffuser. It keeps a constant mutual arrangement between the reflective sheet 23 Board and surface 19b of the light entering the lens 19 of the lens in the z direction.

As explained above, according to this modification, the guide elements 27-1 formed to be in contact with the reflective sheet 23 of the card, with no gap between them. Because of the restrictive elements 27-1 is formed with no gap between the limiting elements 27-1 and the lens 19 of the lens, the reflective sheet 23 Board not modified, with those who want to be close to the lens 19 of the diffuser, and the mutual position between the lens 19 of the lens and the reflective sheet 23 Board is kept constant. Accordingly, the distribution of light reflected from the reflective sheet 23 Board and penetrating into the lens 19 of the diffuser, is stabilized.

<the Second is an implementation option>

The second variant implementation of the present invention will be explained with reference to Fig. 19 and 20. In the second embodiment, the modified layout restrictive elements 127 and shape of the bounding element 127. Design, operation and results are the same as in the first embodiment, will not be explained.

As is illustrated in Fig. 19 and 20, the restrictive element 127 is provided adjacent to the installation part 19e on the surface 19b of the light entering the lens 19 of the lens and formed continuously from the mounting portion 19e. More precisely, the restrictive element 127 is formed to have an essentially round cross-section so as to surround the underlying portion of the protrusion of the mounting portion 19e on the surface 19b of the input light. The restrictive element 127 is attached to the full outer peripheral surface of the mounting portion 19e. In other words, the mounting portion 19e is the underlying part of the ledge with a step to have a larger diameter than the outer end portion of the protrusion, and a larger diameter to what appears restrictive element 127. The restrictive element 127 is formed continuously from the mounting portion 19e and also formed continuously from the surface 19b of the input light. This strengthens the mounting portion 19e. The surface bounding element 127, which faces the rear side surface facing to the edge of the opening 23b of the mounting pilot side of the reflective sheet 23 Board having a clearance C2 between them. Namely, the edge part of the hole 23b installation installation part of the reflective sheet 23 Board configures the contact portion 128, which is in contact with the bounding element 127.

As explained earlier, in the present embodiment, the guide element 127 is provided as a part of a lens 19 of the lens and formed continuously from the mounting portion 19e. This improves the strength of the mounting portion 19e. The restrictive element 127 is formed to surround the mounting portion 19e. This further improves the strength of the mounting portion 19e.

The restrictive element 127 is provided as a part of a lens 19 of the lens and adjacent to the installation part 19e on the lens 19 of the diffuser. This limits the mutual position between the lens 19 of the lens and the reflective sheet 23 Board in a position close to the mounting portion 19e. Accordingly, the mounting portion 19e and restrictive element 27 arranged in the same position on the lens 19 of the diffuser, and this simplifies the design of the lens 19 of the lens.

As described above, was illustrated by the second variant of implementation of the present invention. However, the present invention is not limited to the above embodiment and, for example, can use the following various modifications. In the following modifications, the same parts and components as in the above variant of implementation, are indicated by the same symbols and will not be explained.

[First modification of the second variant of realization]

The first modification of the second variant of implementation will be explained with reference to Fig. 21 and 22. Modified form of the restrictive element 127-1.

As is illustrated in Fig. 21 and 22, the guide element 127-1 formed to be partially continuous from the outer peripheral surface of the mounting portion 19e. More precisely, the restrictive element 127-1 formed continuously from a portion of the outer peripheral surface of the underlying portion of the protrusion of the mounting portion 19e, that is, on the opposite side from the LED 17. In other words, the restrictive element 127-1 formed to protrude outward from the underlying end portion of the protrusion of the mounting portion 19e in the direction opposite from the LED 17 (so as to be remote from the LED 17). The restrictive element 127-1 con is identified, in order to put in the middle of the mounting portion 19e with the LED 17 in the top view. This increases the distance between the LEDs 17 and the bounding element 127-1, and protects the restrictive element 127-1 from the opening on the side of the LED 17. The restrictive element 127-1 formed to be continuous from the underlying portion of the protrusion of the mounting portion 19e and surface 19b of the input light, and to be able to come into contact with the contact part 128-1, which is configured edge part of the hole 23b of the mounting installation section.

[Second modification of the second variant of realization]

The second modification of the second variant of implementation will be explained with reference to Fig. 23 and 24. Modified form of the restrictive element 127-2.

As is illustrated in Fig. 23 and 24, the restrictive element 127-2 stretches along the direction of the circumference of the lens 19 of the lens and formed in a continuous loop (in the form of a toroid) in the top view. More precisely, the restrictive element 127-2 formed in a ring shape in the top view in order to have a constant distance from the LED 17. The radius of the ring with a restrictive element 127-2 essentially equal to the distance between the LED and the installation part 19e. The restrictive element 127-2 stretches along the direction of the circumference of the lens 19 of the lens over the entire area between the adjacent mounting portions 19e and form the Rowan continuously from each mounting portion 19e. The restrictive element 127-2 surrounds the LED 17 throughout the peripheral area of the LED 17. Accordingly, the restrictive element 127-2 limits the deformation of the reflective sheet 23 Board over a larger area. The contact part 128-2 on the reflective sheet 23 of the card, which comes in contact with the restrictive part 127-2, formed in the shape of a circular ring so as to overlap the bounding element 127-2 in the top view.

<a Third option exercise>

Third alternative implementation of the present invention will be explained with reference to Fig. 25. In the third embodiment, the guide elements 227 are provided on the reflective sheet 223 of the Board. Design, operation and results, which are the same as in the first embodiment, will not be explained.

As is illustrated in Fig. 25, the restrictive element 227 is provided as a part with a reflective sheet 223 of the Board. More precisely, the restrictive element 227 is a separate component from the reflective sheet 223 of the Board. The restrictive element 227 as a part attached to the reflective sheet 223 Board mounting means, such as glue. The restrictive element 227 is formed essentially in the shape of a block and has a surface which is facing the surface 19b of the light entering the lens 19 of the diffuser, is flat and is parallel to the surface 19b of the input light. The clearance C2 is provided between the bounding element 227 and the surface 19b of the input light, and the reflective sheet 223 Board the opportunity to be deformed toward the lens 19 of the lens within the range of the clearance C2. However, the restrictive element 227 is in contact with the surface 19b of the input light, to limit further deformation. Therefore, the surface 19b of the light entering the lens 19 of the lens that overlap the bounding part 227 are contact portions 228. Flat layout restrictive elements 227 on the reflective sheet 223 Board is the same as the flat arrangement of reflective elements 27 on the lens 19 of the lens in the first embodiment (see Fig. 17), and will not be explained.

As explained earlier, in the present embodiment, the guide elements 227 are provided as a part with a reflective sheet 223 of the Board. If the bounding elements 27 are provided as a part of a lens 19 of the diffuser, as happens in the first embodiment, the optical design requires taking into account that the light penetrating the lens 19 of the diffuser extends in a restrictive elements 27. Compared with such a case, the optical design of the lens 19 of the diffuser is simple in the present embodiment.

Og is anchialine elements 227 are provided separately from the reflective sheet 223 of the Board and is attached to and provided as a part of the reflective sheet 223 of the Board. This simplifies the manufacturing process for the preparation of restrictive elements 227 as a part of the reflective sheet 223 of the Board.

<Fourth an implementation option>

The fourth variant of implementation of the present invention will be explained with reference to Fig. 26. In the fourth embodiment, the reflective sheet 23 fees are excluded from the structures according to the first variant implementation. Design, operation and results, which are the same as in the first embodiment, will not be explained.

In the present embodiment, the reflective sheet 23 Board according to the first variant implementation is not included in the composition, and changed the shape and the Assembly process of the reflective sheet 322 of the chassis. As is illustrated in Fig. 26, the reflective sheet 322 chassis under this option implementation includes a hole 322d mounting the LED and holes 322e installation installation part corresponding to the LED 17 and the lens 19 of the diffuser. Each LED 17 is mounted through each of the holes 322d mounting LED, and each mounting portion 19e of the lens 19 is mounted through each of the holes 322e installation installation part. The reflective sheet 322 chassis includes components that are included in the reflective sheet 23 Board according to the first variant implementation. During Assembly, after the LEDs 17 mounted on the Board 18 LEDs, each card 18 LED asmeeta in the chassis 14, and the reflective sheet 3232 chassis is prepared on the side of the front surface of the circuit Board 18 LED. At this time, each LED 17 is mounted through a hole 322d mounting LED. After that, the lens 19 of the diffuser is prepared for each LED 17, and each mounting portion 19e is mounted through a hole 322e installation installation part. Accordingly, the portion of the reflective sheet 322 chassis is provided between the adapter 18 and the LED and the lens 19 of the lens, and therefore, the light that is reflected by the lens 19 of the lens and directed to charge 18 LED, again reflected by the reflective sheet 322 chassis on the lens 19 of the diffuser. The mutual position between the reflective sheet 322 of the chassis and each lens 19 of the diffuser in the direction of the Z axis is limited by the bounding elements 27 provided on each lens 19 of the diffuser. It achieves good optical power.

<Fifth an implementation option>

The fifth implementation of the present invention will be explained with reference to Fig. 27. In the fifth embodiment, modified profiles restrictive elements 427 and the reflective sheet 423 Board. Design, operation and results are the same as in the first embodiment, will not be explained.

As is illustrated in Fig. 27, restrictive element 427 is the amount of protrusion from the surface 19b of the light entering the lens 19 receiveth the La, which is essentially equal to the distance between the surface 19b of the input light and the printed circuit Board 18 LED, that is essentially equal to the amount of protrusion of the adjusting portion 19e. The restrictive element 427 is formed essentially in columnar form (having a round cross-section)having essentially a constant diameter along the entire length, like mounting portion 19e. The restrictive element 427 is the size of the projection and the diameter essentially equal to those of the mounting portion 19e. The reflective sheet 423 Board has contact holes so as to overlap each bounding element 427 in the top view. The restrictive element 427 is mounted through each of the contact holes 29 and the peripheral surface of the contact hole 29 is in contact with the bounding element 427. The contact hole 29 has a diameter essentially equal to the diameter of the bounding element 427. Therefore, the restrictive element 427 is mounted through a contact hole 29 and, in this state, which are facing each other, the peripheral surfaces are in contact with each other at full peripheral surfaces. The restrictive element 427 firmly mounted in the contact hole 29, and this causes the resistive force of friction between the bounding element 427, and the contact hole 29. Therefore, even if the butts is W power which makes the reflective sheet 423 Board closer to the lens 19 of the diffuser, the force of friction generated by contact between the bounding element 427, and the contact hole 29, restricts the deformation of the reflective sheet 423 Board toward the side of the lens 19 of the lens.

As explained earlier, in the present embodiment, the contact holes 29 are provided on the reflective sheet 423 fees, and restrictive element 427 is mounted through each contact hole 29 and the peripheral surface of the contact hole 29 is in contact with the bounding element 427. Accordingly, the peripheral surface of the contact hole 29 is in contact with the bounding element 427, which is mounted through a contact hole 29, and the frictional force is generated between them. This friction limits the mutual position between the lens 19 of the lens and the reflective sheet 429 Board.

As described above, was illustrated to the fifth implementation of the present invention. However, the present invention is not limited to the above embodiment and, for example, can use the following various modifications. In the following modifications, the same parts and components as in the above variant implementation, ukazyvayutsya same symbols, and will not be explained.

[First modification of the fifth variant of the implementation]

The first modification of the fifth variant of the implementation will be explained with reference to Fig. 28 and 29. The shape of the bounding element 427-1 changed.

As is illustrated in Fig. 28 and 29, the restrictive element 427-1 formed a truncated cone, which is oblique to the outer end. The restrictive element 427-1 formed, of the conditions to the underlying portion of the ledge had a constant diameter, and the diameter continuously and gradually changed and decreased toward the outer end of the lip. The restrictive element 427-1 beveled surface 4271 on its outer peripheral surface. Pin hole 29-1 has a diameter that is smaller than the diameter of the underlying part of the projection of the bounding element 427-1, and greater than the diameter of the outer end of the lip bounding element 427-1. Therefore, the outer end portion of the projection of the bounding element 427-1 can be mounted in the contact hole 29-1 and, in assembled condition, the beveled surface 427a restrictive element 427-1 and the inner peripheral surface of the contact hole 29-1 meet each other. If the applied external force, which makes the reflective sheet 423 closer to the lens 19 of the lens, the edge part to the stroke holes 29-1 comes in contact with a beveled surface 427a restrictive element 427-1, this limits the deformation of the reflective sheet 423 in the direction of the lens 19 of the lens.

As explained earlier, in this modification, the guide element 427-1 formed to decrease in size towards the outer end, and has a beveled surface which is facing to the peripheral surface of the contact hole 29-1. Accordingly, the restrictive element 427-1 is in steady contact with the peripheral surface of the contact hole 29-1 and reliably performs a limiting function.

<Other embodiments of>

As describe above described one or more embodiments of the present invention. However, the present invention is not limited to the above implementation options described in the above description and the drawings. For example, the following implementation options are also included in the technical scope of the present invention.

(1) the Layout and number of restrictive elements can be changed, if necessary. For example, it may be a different distance between each of the bounding element and the LED. Restrictive elements can be linked to different angular intervals. Each of the restraining elements may be arranged so as to overlap the outer edge of the PLA is s LED on the top view. Each restraining element may be provided adjacent to the LED. The number of restrictive elements may be two or less for each lens of the lens or may be four or more for each lens of the lens.

(2) the Layout and the number of mounting parts can be changed as described in (1). Installation part supports the lens of the lens that was mounted on the card LED, therefore, preferably has three or more mounting parts. However, one installation piece or two mounting portions may be provided, if sustained support function support changing the form of the installation part.

(3) the relative layout of the installation part and the bounding element can be changed if necessary. For example, the distance between each of the bounding element and the LED may be larger or smaller than the distance between each mounting part and the LED. Restrictive elements or the installation part can be arranged following each other in the circumferential direction of the lenses of the lens. Each bounding element and each installation part can be linked to different angular intervals. The distance between each of the bounding element and each installation part, which are adjacent on the ug with each other, may be different.

(4) the Shape of the bounding element can be changed if necessary. For example, the guide element can be formed in a columnar shape, a prismatic shape, a conical shape or a pyramidal shape. Restrictive element can be formed to have a cross-section angular shape (triangular shape), square shape, a spherical shape or an elliptical shape. The restrictive element can be formed in a linear shape, an elliptical shape or a corrugated shape in the top view. The restrictive element is not necessarily in point contact with the reflective sheet Board (reflective sheet of the chassis). Restrictive element can be formed to be in line contact or surface contact with the reflective sheet.

(5) In the above embodiments, implementation (not in the third embodiment), the restrictive element protrudes from the surface of the light entering the lens of the lens. However, the restrictive element may protrude from the outer surface of the lenses of the lens.

(6) In the above embodiments, the implementation of restrictive elements provided on one of the lenses of the lens and the reflective sheet Board. However, the guide elements can be provided on the lens of the lens and reflectors for safe d is enom sheet Board. In this case, the guide elements provided on the lens of the lens and provided on the reflective sheet Board, do not overlap with each other in the top view, and each of restrictive elements provided on one of the lenses of the lens and the reflective sheet of the card, you may get in touch with another one of the lenses of the lens and the reflective sheet Board. Restrictive elements provided on the lens of the lens and provided on the reflective sheet Board, overlap with each other in the top view, and restrictive elements provided on the lens of the lens and provided on the reflective sheet Board can enter into contact with each other.

(7) In the second embodiment and its modifications, the restrictive element is formed continuously from the installation part and the surface of the input light. The restriction may be formed continuously only from the installation side or only on the surface of the input light. The direction of projection of the bounding element from the installation part can be changed, if necessary. For example, the guide element may be in the direction of the LED.

(8) In the third embodiment, the guide elements are provided as a part of the reflective sheet of the Board. Restrictive elements is s can be formed separately from the lens of the lens, and certain restrictive elements may be attached to the lens of the lens mounting means, to be provided as a part of a lens of the lens.

(9) In the third embodiment, the guide elements, which are provided separately from the reflective sheet Board, provided as a part with a reflective sheet Board by the mounting means. Restrictive elements may be formed as an integral part with a reflective sheet Board. For example, the reflective sheet of the card can be partially folded to form a curved portion that protrudes toward the lens of the lens, as the bounding element. Part of the reflective sheet Board can be formed to be thick, and the thick portion functions as a restrictive element.

(10) In the above embodiments, the implementation gap is provided between the installation part of the lenses of the lens and aperture Assembly installation parts. (10) Almost no gap may be formed between the mounting part and the mounting hole installation part.

(11) the Specific size of the reflective sheet (card relative to the card LED or lens of the lens) can be changed, if necessary. For example, the reflective sheet of the card can be cor the rigid side, essentially the same as or less than the diameter of the lens. The reflective sheet of the card can have the size of the short side, is essentially the same as or smaller than the size of the short side of the card LED. If the reflective sheet Board is sized so as to be provided within an internal region of the installation parts mounting holes mounting portions may not be formed.

(12) In the above embodiments, the implementation, the reflective sheet Board overlaps the edge portion of the mounting holes lens reflective sheet of the chassis. However, the inner peripheral surface of the hole of the mounting of the lens can be located in the same plane as the outer peripheral surface of the reflective sheet Board, and in this case, the reflective sheet card does not cover the edge part of the mounting holes of the lens. In addition, the reflective sheet Board may not be necessarily provided over the entire area in the mounting hole of the lens, but may be provided on the portion of the area in the mounting hole of the lens. That is, the area of the front surface of the card LED can be opened in the space in the hole of the mounting of the lenses.

(13) In the above embodiments, implementation, card LED is the size of the short side, smaller than the diameter of the lens of the lens. However, the size of the short article is Rhone-Board LEDs can be equal to or greater than the diameter of the lenses of the lens.

(14) In the above embodiments, implementation, LED installed on Board LED. However, if you use LEDs, which are not installed on the Board LED charge LED may not be included in the composition.

(15) the installation Position of fixation on each Board LED and the number of fixation elements can be changed, if necessary. The installation position of the fixation on the chassis and the number of fixation elements can be changed, if necessary.

(16) In the above embodiments, the implementation, the fixing part insertion type is used as a mechanism to setup the fixation element on the chassis. However, this may be a mechanism for installing movable type. The installation mechanism movable type includes a fixing part having the form of a hook profile. In this installation mechanism, the main body is pressed against the bottom plate of the chassis and moves along the bottom plate of the conditions that shaped hook portion of the fastening part has a stop edge part of the mounting holes.

(17) In the above embodiments, the implementation, the mounting portion of the fixation element is mounted through the mounting hole and now through the chassis. However, the specific method of attachment for attaching the mounting portion to the chassis, may be treason is, if you want to. For example, mounting holes and elastic stoppers may not be included in the composition, and the underlying part, which passes through the through hole of the card LED, may be attached to the surface of the inner wall of the chassis sticky substance. In this case, the method of fastening may be by deposition or by welding.

(18) In the above embodiments, the implementation that uses the elements of the latching type with one function and fixation multifunction type. However, can only be used by fixation type with one function, or can be used only fixation multifunction type. The ratio of the number of elements fixing type with one function and fixation multifunctional type can be changed, if necessary.

(19) In the above embodiments, the implementation, the chassis is made of metal but may be made of other materials, such as synthetic polymer.

(20) In the above embodiments, the implementation, the surface of the fixation element is white. However, the surface of the fixation element may be milky white or silver. Paint desired color can be superimposed on the surface of the fixation element to change the color of the surface.

(21) In the above embodiments, implementation, card LED type with pattycakeonline LED, charge LED type with six mounted LED Board LED type with eight mounted LED can be combined to be used. Can be used charges LED with the LED quantity, otherwise than five, six and eight.

(22) In the above embodiments, implementation, LED includes crystal LED, emitting light of a single color in blue, and the LED emits white light by the fluorescent material. The LED may include crystal LED emitting ultraviolet rays, and emits white light by the fluorescent material.

(23) In the above embodiments, implementation, LED includes crystal LED, emitting light of a single color in blue, and emits white light by the fluorescent material. However, the LED may include different types of crystals, LEDs, each of which emits a single color light of red (R), green (G) or blue (B). The LED may include different types of crystals, LEDs, each of which emits a single color of light C (blue), M (Magenta) or Y (yellow).

(24) In the above embodiments, the implementation uses LEDs, which emit white light. LEDs that emit red light, LEDs that emit blue light, and LEDs that emit green light, can combine the I properly to be used.

(25) In the above embodiments, implementation, LEDs are used as point light sources. Can be used a point light source other than LED.

(26) In the above embodiments, the implementation of LED, which is a point light source is used as light source. A point light source is not necessarily used as a light source, but a linear light source such as cold cathode lamp or lamp with a hot cathode or plate-like light sources such as an organic EL may be used as light source.

(27) In the above embodiments, implementation, lens diffuser that diffuses light from the LED is used as optical lenses. However, you can use any optical lens, other than the lens of the lens (for example, collecting lens having a light-harvesting function).

(28) In the above embodiments, implementation, lens diffuser is used as the optical component, but can be used for optical components (light-diffusing component), other than lenses.

(29) the screen Size and the ratio of the horizontal to the vertical liquid crystal display device can be changed, if necessary.

(30) In the above embodiments, the implementation, inconsistency panel and the chassis are arranged in a vertical position, from the condition that the direction of the short side corresponded to the vertical direction. However, the liquid crystal panel and the chassis are arranged in a vertical position, of the conditions to the long side direction corresponded to the vertical direction.

(31) In the above embodiments, implementation, TFT used as a switching components of the liquid crystal display device. However, the technology described above can be applied to liquid crystal display devices, including switching components other than TFT (for example, thin-film diodes (TFD)). Moreover, the technology can be applied not only to a color liquid crystal display devices, but also to the black and white liquid crystal display devices.

(32) In the above embodiments, the implementation, the liquid crystal display device includes a liquid crystal panel as the display panel. The technology can be applied to display devices, including other types of display components.

(32) In the above embodiments, the implementation uses a television receiver comprising a tuner. However, the technology can be applied to a display device without a tuner.

LEGEND

10 Liquid crystal display device (display device), 11: Liquid crystal panel (the panel display device), 12: Device backlight (lighting device), 14: Chassis, 17: LED (light source, a point light source), 17a: the Surface of the light emission, 18, 318:Charge LED (charge of the light source), 19: Lens of the lens (optical component, an optical lens), 19b: the entrance Surface of the light (the surface closest to the light source) 19e: Installation part 22: the Reflective sheet of the chassis (the reflective element chassis), 22b: the mounting Hole of the lens (the aperture mounting the optical component), 23, 223, 423: Reflective sheet, card (the reflective element), 23a: Hole mounting LED (hole mounting of the light source), 23b: Hole installation installation part, 27, 127, 227, 427: Restrictive element, 28, 128, 228: Contact part 29, 129, 229: contact hole 322: Reflective sheet of the chassis (the reflective element), 322d: Hole mounting LED (hole mounting of the light source), 322e: Hole installation installation part C1: Clearance, C2: Clearance, TV: Television receiver, U: Block LED block (light source)

1. The light source unit, comprising:
the light source having the surface of the light emission;
the optical component is provided to be drawn to the surface of the light emission;
the reflective element is provided to be adjacent to the surface of the optical component is enta, which is close to the light source and configured to reflect light; and
the restrictive element extending from one of the optical component and the reflective element toward the other one of the optical component and the reflective element and configured to restrict relative position between the optical component and the reflective element.

2. The light source unit according to claim 1, in which the restrictive element is formed to have a gap between the limiting element and the other one of the optical component and the reflective element.

3. The light source unit according to claim 1, in which the restrictive element is formed to be in contact with another one of the optical component and the reflective element, with no gap between the limiting element and the optical component.

4. The light source unit according to any one of claims 1 to 3, in which the restraining element includes many of the restrictive elements, and restrictive elements provided by scattered over the surface are facing each other of the surfaces of the optical component and the reflective element.

5. The light source unit according to claim 4, in which the bounding elements are provided with equal intervals.

6. The light source unit according to any one of the claim 1 to 3 and 5, in which the light source is a point light source, which is formed in a dot shape in the top view.

7. The light source unit according to claim 6, in which the restrictive element is provided to be located farther from the point light source in the top view.

8. The light source unit according to claim 7, in which the restraining element includes many of the restrictive elements, and restrictive elements are provided to be equal to the distance from a point light source.

9. The light source unit of claim 8, in which the bounding elements are provided with equal angular intervals.

10. The light source unit according to any one of claims 7 to 9, further containing a charge of the light source, having an installation surface on which the point light source, and having a reflective element which is overlapped on the installation surface, with the reflective element includes a mounting hole of the light source, through which is mounted a point light source.

11. The light source unit of claim 10, in which the restrictive element is provided to cover the outer edge of the circuit Board of the light source in the top view.

12. The light source unit of claim 10, in which the reflective element is larger than the charge of the light source, in the top view.

13. Block IP is the light source of claim 10, in which the optical component includes an installation portion, which protrudes toward the circuit Board of the light source and configured to be mounted on the charge of the light source, and the installation part is intended to be further from a point source of light in the top view.

14. The light source unit according to item 13, in which the restraining element includes a hole installation installation part, through which is mounted the installation part.

15. The light source unit according to 14, in which a gap is formed between the mounting hole mounting part and the mounting part.

16. The light source unit according to any one of p-15, in which the restrictive element is provided as a part of the optical component and is intended to be further from the installation part on the optical component.

17. The light source unit according to clause 16, in which the installation part includes a set of installation parts and restrictive element includes many of the restrictive elements, and the installation part and the bounding elements are provided alternately in the circumferential direction of the optical component.

18. The light source unit according to claim 11, in which the installation part and the bounding elements are provided with equal intervals.

19. The light source unit according to any who demo of PP and 18, in which the installation part and the bounding elements are provided to be equal to the distance from a point light source.

20. The light source unit according to any one of p-15, 17 and 18, in which the restrictive element is provided as a part of the optical component and formed continuously from the installation part.

21. The light source unit according to claim 20, in which the restrictive element is formed to surround the installation part.

22. The light source unit according to any one of p-15, 17, 18 and 21, in which the restrictive element is provided as a part of the optical component and adjacent to the installation part on the optical component.

23. The light source unit according to claim 6, in which a point light source is arranged essentially in the center of the optical component.

24. The light source unit according to claim 6, point source of light is LED.

25. The light source unit according to claim 6, in which the optical component is a component of svetorasseivateley configured for scattering light.

26. The light source unit according to any one of claims 1 to 3, 5, 7-9, 11-15, 17, 18, 21, 23, 24 and 25, in which the restrictive element is provided as a part of the optical component.

27. The light source unit according p, in which the reflective element is provided to be adjacent to the bounding element, and includes himself in the contact part, configured for entering into contact with the bounding element.

28. The light source unit according p, in which the reflective element has a contact hole through which is mounted a restrictive element, and the contact hole has a peripheral surface configured to enter into contact with the bounding element.

29. The light source unit according p, in which the restrictive element is formed to be oblique to the outer end, and has a beveled surface which is facing the peripheral surface of the contact hole.

30. The light source unit according to any one of claims 1 to 3, 5, 7-9, 11-14, and 15, in which the restrictive element is provided as a part of the reflective element.

31. The light source unit according to item 30, in which the restrictive element is provided separately from the reflective element and attached to the reflective element to be provided as an integral part of him.

32. The light source unit according to any one of claims 1 to, 2, 3, 5, 7, 8, 9, 11-15, 17, 18, 21-25, 27-29 and 31, in which the restraining element has a curved surface, which faces the other one of the optical component and the reflective element.

33. The light source unit according p, in which the restrictive element has a spherical surface, which faces the other is Oh one of the optical component and the reflective element.

34. The light source unit according to any one of claims 1 to 3, 5, 7-9, 11-15, 17, 18, 21-25, 27-29, 31, and 33, in which the reflective element is larger in size than the optical component, in the top view.

35. The light source unit according to any one of claims 1 to 3, 5, 7-9, 11-15, 17, 18, 21-25, 27-29, 31, and 33, in which the optical component is an optical lens configured for scattering or gathering light.

36. The light source unit according p, in which the optical lens is a lens of the lens, configured for scattering light.

37. Lighting device, comprising:
the light source unit according to any one of claims 1 to 36;
chassis configured to accommodate the light source unit therein; and
the reflective element of the chassis, provided along the inner surface of the chassis and having a mounting hole of the optical component through which is mounted the optical component.

38. The lighting device according to clause 37, in which the reflective element is provided in the space within the holes of the mounting of the optical component in the top view, and in order to overlap the edge portion of the hole of the mounting of the optical component in the top view.

39. A display device, comprising:
the lighting device according to any one of p and 38; and
a display panel configured for issuing a display using the light of the lighting device.

40. The display device according to 39, in which the display panel is a liquid crystal panel using liquid crystals filled between the base boards.

41. Television receiver containing the display device according to one of PP and 40.



 

Same patents:

FIELD: electricity.

SUBSTANCE: illumination device 12 contains a great number of point sources 80 of light, base 14 comprising point sources 80 of light and window 14b through which light passes from point sources 80, optical element 15 (15a) faced towards point sources 80 of light and capable to cover the window 14b. Point sources 80 of light are located so that they ensure LH zone with high density of light sources in which the interval of the above sources is relatively small and LL zone with low density of light sources in which the interval of the above sources is relatively big. Reflective sections 50 which reflect light emitted by point sources 80 are formed at least in the area brought in coincidence with LL zone with low density of light sources in the optical element 15 (15a).

EFFECT: reducing costs and energy consumption and increasing brightness of illuminated surface.

19 cl, 12 dwg

FIELD: electricity.

SUBSTANCE: highlighting device 12 consists of a board 18 with installed light-emitting diodes 17 serving as a light source, chassis 14 with the installed board 18 with light-emitting diodes 17 and an opening 4b for passage of light emitted by the light-emitting diodes 17 and holder 20 that passes in at least one direction along surface of the board plate 18 and fixed to chassis 14 in order to hold the board 18 together with chassis between the holder 20 and chassis 14.

EFFECT: ensuring stable fixture for light sources without use of screws.

36 cl, 29 dwg

FIELD: physics.

SUBSTANCE: in the method of assembling microelectronic components, once a position fixing polymer (4), in order to maintain alignment of microelectronic components (2) that are assembled on a substrate (1) using an anisotropic electroconductive film (7), is applied onto the substrate and hardened, the microelectronic components (2) are heated to a predetermined temperature and compressed at a predetermined pressure using a flexible sheet (5) provided on the microelectronic components and then subjected to single-step compressive fixation on the substrate (1).

EFFECT: providing a method of assembling microelectronic components which, when using an anisotropic electroconductive film to assemble a plurality of microelectronic components of different height on a base plate, allows assembling at precise positions on the base plate, thereby preventing position shift which results from compressive fixation.

5 cl, 16 dwg

FIELD: electricity.

SUBSTANCE: illumination device has a backlight unit (12), a panel (18) having light-emitting diodes (17) as a light source, a mounting frame (14) in which the panel (18) with light-emitting diodes (17) is mounted and which has an opening (14b) for outputting light from the light-emitting diodes (17), a reflecting sheet (22) for the mounting frame (14), placed along its inner surface for reflecting light, and a reflecting sheet (23), which, when viewed from the top, overlaps the panel (18) with light-emitting diodes on the side the opening (14b) more than the panel (18), and reflects light. The mounting frame (14) has a first supporting segment (27) which supports the panel (18) with the light-emitting diodes, and a second supporting segment (28) which is placed nearer to the opening (14b) than the first supporting segment (27) and which supports the reflecting sheet of the panel (23).

EFFECT: improved device.

36 cl, 33 dwg

FIELD: electrical engineering.

SUBSTANCE: 12-colour illuminator includes lamp 17 with hot cathode, mounting panel 14, diffuser 30 and supporting member 20. The mounting panel 14 contains lamp 17 with hot cathode and has hole 14b for light passage from lamp 17 with hot cathode. Diffuser 30 is placed before the lamp 17 with hot cathode and closes hole 14b. Supporting member 20 supports diffuser 30 at the side close to lamp 17 with hot cathode. Mounting panel 14 includes the area facing diffuser 30 and is set in LA area of light source with installed lamp 17 with hot cathode and empty LN area without lamp 17 with hot cathode. Diffuser 30 has a higher coefficient of luminous reflectivity at DA area covering light source in comparison with DN area covering the empty area. Diffuser 30 has maximum luminous reflectivity Rmax and minimum luminous reflectivity Rmin, and supportive element 20 is envisaged at the area covering the area of diffuser 30 that has luminous reflectivity R that meets the following equation (1).

EFFECT: prevention of irregular brightness.

19 cl, 24 dwg

FIELD: electrical engineering.

SUBSTANCE: lighting device 12 consists of a body 14 with a light source 17 and optical component 15a oriented to the light source 17. The optical component 15a has DA part overlapped with the light source, overlapped with LA area of the light source layout in the body 14 and DN part non-overlapped with the light source, overlapped with LN area of the light source non-layout where the light source 17 is not configured. The DA part overlapped with the light source has surface oriented to the light source 17, at that this surface has light reflectance bigger than light reflectance of the DN part non-overlapped with the light source. The DA part overlapped with the light source includes LR area with low light reflectance; this area is oriented to the light source 17, at that this surface has light reflectance less than the same coefficient for the area adjoining the DA part overlapped with the light source.

EFFECT: improvement of light intensity in the central area of the emitting surface.

18 cl, 22 dwg

FIELD: electrical engineering.

SUBSTANCE: light sources (2) and areas (6) with a gap are installed at substrate (4) so that optical layer (5) and light-emitting surface consisting of outputting surfaces (1 c) are located at the preset distance from each other. At that areas (6) with a gap are located so that they pass from respective gaps and each gap is formed by adjoining optical conductors (1) which are located without overlapping each other.

EFFECT: reduction of the device thickness and improvement of luminescent uniformity without deterioration.

7 cl, 10 dwg

FIELD: information technologies.

SUBSTANCE: liquid-crystal display device (100) comprises: a liquid-crystal panel (200), comprising a face transparent substrate (210), a rear transparent substrate (220) and a liquid-crystal layer (230), provided between the face transparent substrate (210) and the rear transparent substrate (220); a unit (300) of side lighting, installed on the liquid-crystal panel (200), the unit (300) of side lighting comprises a source of light (320), provided at the side of the liquid-crystal panel (200), and a light-guide plate (330), provided between the liquid-crystal panel and the source of light; and a frame (310), where the source of light (320) and the light guide plate (330) are installed.

EFFECT: improvement of a device.

31 cl, 7 dwg

FIELD: electrical engineering.

SUBSTANCE: each fist reflector plate (3) is designed so that to cover the corresponding light guide conduit (5) surface that is the surface opposite to the output light emitting surface (5c) of the corresponding light guide conduit (5). Each second reflector plate (4) is arranged on the surface of the corresponding first reflector plate (3) that is opposed to the surface turned towards the corresponding light guide conduit (5) over the corresponding first gap (1), each first gap (1) formed by two overlapping neighbouring light guide conduits. Each second reflector plate (4) covers the area where the first reflector plate (3) is not in place in the corresponding first gap (1) and passes over two neighbouring light guide conduits (5).

EFFECT: small thickness and improved uniformity of the light emitting surface luminescence brightness; creation of a surface illumination light source including such illumination device; creation of a LED display including the surface illumination light source as a backlighting source, ensuring high image quality and having small thickness.

17 cl, 8 dwg

FIELD: physics.

SUBSTANCE: backlight has a solid transparent light guide (42) with a plurality of openings in the bottom surface of the light guide, each opening containing a side-emitting LED (10). Prisms or other optical elements (44, 48) are formed in the top wall of each opening to reflect light in the light guide towards a light output surface of the light guide so that the side-emitting LEDs do not appear as dark spots at the output of the backlight. To avoid any direct emission from the sides of the LED towards the output surface of the light guide appearing as bright areas, optical elements (80, 88, 94, 97) are formed at the edges of the openings or in the output surface of the light guide so that direct emission light is not output from the light guide. Substantially identical cells may be formed in the light guide using cellular walls (61, 72) around one or more LEDs.

EFFECT: high uniformity of brightness.

7 cl, 20 dwg

FIELD: physics.

SUBSTANCE: optical system includes a cylindrical side emitter lens, a reflector and a cylindrical Fresnel lens. The cylindrical side emitter lens redirects light from a light source, such as multiple light-emitting diodes arranged in a row, into side emitted light along an optical axis which is parallel with the exit plane. The reflector may be a stepped multi-focal length reflector which includes multiple reflector surfaces with different focal lengths based on the distance from the surfaces to the light source and height to redirect light from the cylindrical side emitter lens to illuminate the exit plane and collimate the light along one axis in the forward direction. The cylindrical Fresnel lens is used to collimate the light along an orthogonal axis in the forward direction.

EFFECT: formation of a uniformly illuminated exit plane with well collimated light in the forward direction.

15 cl, 5 dwg

FIELD: physics.

SUBSTANCE: input/output lens is meant for input/output of a first light, having a first wavelength, from a first light source together with a second light, having a second wavelength, from a second light source lying next to the first light source. The lens has a first surface facing the first and second light sources. The first surface has a first and a second region, the first region having a first region curvature and the second region having a second region curvature. The second surface lies on the opposite side of the first surface and a second surface curvature. The position of the centre of curvature of the first region is different from that of the centre of curvature of the second region. The centre of curvature of the second surface and the centre of curvature of the first region lie on the optical axis of the first or second light source.

EFFECT: high efficiency of utilising light and high quality of wave front of the light flux.

20 cl, 26 dwg

Lighting device // 2470221

FIELD: electricity.

SUBSTANCE: invention relates to the field of lighting equipment. A lighting device (1) comprises an extended flat base (2), large number of semiconductor sources (3) of light, arranged on a flat base in a longitudinal direction of the flat base, and a lens plate (4), arranged in front of semiconductor sources of light. The lens plate comprises a lens surface of light falling facing semiconductor sources of light and a lens surface of light radiation, the first lens section (5), formed on one of lens surfaces of light falling or light radiation and distributing light, radiated by semiconductor sources of light in a longitudinal direction, the second lens section (9), formed on the other one of lens surfaces of light falling or light reflection for distributing light radiated with semiconductor sources of light, in direction of width. The first lens section has a unit with a curvilinear surface comprising two or more curvilinear surfaces of a convex section, having different radii of curvature and formed adjacently with each other in a longitudinal direction. Each curvilinear surface of the convex section is arranged inside an area, which corresponds to width of each semiconductor source of light in longitudinal direction.

EFFECT: increased evenness of lighting and simplified design.

6 cl, 15 dwg

Light beam former // 2456503

FIELD: physics.

SUBSTANCE: device has a lens, having an axis, an input dioptre and an output dioptre. The output dioptre has a first collecting section, a second collecting section and a scattering section which connects said first and second collecting sections. The output dioptre has an axially symmetric continuous surface around the axis of rotation which is perpendicular to said axis.

EFFECT: high uniformity of illumination.

19 cl, 10 dwg

FIELD: physics.

SUBSTANCE: optical device has at least a first separate part (10) in form of a solid waveguide and an additional separate part (10") for connecting with the light-emitting diode (LED) light source. The first separate optical part (10) narrows in the direction z in a Cartesian coordinate system from the x-y plane, has longitudinal length in the direction y which is less than or equal to its longitudinal length in the directions z and x, and has first and second flat outer surfaces (14), lying oppositely in the x-z plane, third and fourth outer surfaces (16, 20) essentially lying opposite in the x-y plane, and fifth and sixth oppositely lying outer surfaces (7), arched and rounded relative the y-z plane. The third outer surface (16) has a rectangular shape. The fifth and sixth outer surfaces (7) are arched such that the fourth outer surface has size in the direction x less than the size of the third outer surface. The third (16), fifth and sixth (7) outer surfaces are primary surfaces for light output, and the light source (6) is entirely placed in the optical device opposite the light output surface (3, 23).

EFFECT: emission of focused light, having a given intensity distribution curve.

9 cl, 4 dwg

Searchlight // 2302585

FIELD: lighting engineering.

SUBSTANCE: searchlight comprises Fresnel lens, reflector, lamp, and at least one additional Fresnel lens. The additional Fresnel lens is made of a lens with negative focus distance and, hence, is a dispersing lens having virtual focus point. The distance (a) between the Fresnel lens and reflector can be changed in correlation with the distance (b) between the lamp and reflector on the basis of the aperture angle determined for the light beam. The virtual focusing point of the dispersing lens is positioned out of the unit of the Fresnel lens, and it can be in coincidence with the focusing point of the reflector that is located far from the reflector. The Fresnel lens is made of a double-concave dispersing lens and has double lens with chromatically corrected characteristics of imaginary. The searchlight has Fresnel lens with integrated diffusion round window that is positioned at the Fresnel lens center and defines the system for mixing light which changes the ratio of the scattered light to the reflected light. The distance (b) can be controlled by moving the lamp with respect to the top of the reflector. The reflector is made of metallic or transparent dielectric material, preferably glass or/and plastic, and represents an ellipsoidal reflector. The Fresnel lens is coated with the dielectric interference layers that change the light spectrum passing through them. The auxiliary reflector is interposed between the Fresnel lens and reflector.

EFFECT: reduced sizes and efficiency.

20 cl, 8 dwg

FIELD: optics.

SUBSTANCE: proposed Fresnel-lens searchlight whose light beam is radiated at adjustable aperture angle has reflector, lamp, and at least one Fresnel lens. The latter is essentially negative focal length lens and, hence, it is negative lens with virtual focal point. Searchlight is designed for superposing focal point distant from reflector onto virtual focal point of Fresnel lens. Mentioned point of reflector is superposed on virtual focal point of Fresnel lens in searchlight position forming quasi-parallel path of beam. It is concave-concave negative lens incorporating duplex lens with chromatically corrected display characteristics. Searchlight Fresnel lens has circular integrated dissipating glass disposed at center of Fresnel lens thereby forming light mixing system that varies some fraction of dissipated light relative to fraction of diametrically and optically reflected light, that is, light mixing is function of Fresnel-lens searchlight position. Searchlight ellipsoidal reflector is made of metal or transparent, preferably dielectric, material in the form of glass and/or plastic. Fresnel lens is covered with a number of dielectric interference layers which function to vary spectrum of light passed through lens. Auxiliary reflector is disposed between Fresnel lens and main reflector.

EFFECT: reduced space requirement and mass compared with prior-art searchlights of this type.

19 cl, 6 dwg

FIELD: the invention refers to searchlights.

SUBSTANCE: the searchlight with Frenel's lens with a regulated angle of aperture of coming out beam of light has preferably an elliptical reflector, a lamp and at least one Frenel's lens. The Frenel's lens has a diffuser, at that the diffuser is fulfilled of round form and is located only in the center of the Frenel's lens or the diffuser is fulfilled with changing degree of dispersion in such a way, that more powerfully dispersed fields are located in the middle of the diffuser and fields dispersed in a less degree are located along its edge. The Frenel's lens with the diffuser form a system of light displacement which changes the share of dispersed light in relation to the share of geometrically and optically projected light and thus changes correlation of light displacement as a function of installing a searchlight with Frenel's lens and also has a real point of focusing of a reflector removed from the reflector. The Frenel's lens is a flat-convex lens with chromatic corrected properties of projection. The covering of the Frenel's lens has a system of dielectric interference layers that changes the spectrum of light passing through it. An auxiliary reflector is installed between the Frenel's lens and the reflector.

EFFECT: provides high degree of effectiveness of obtaining of even coming out of light.

17 cl, 5 dwg

FIELD: light engineering.

SUBSTANCE: searchlight comprises Fresnel lens with controlled aperture of output beam, elliptical reflector, lamp, and at least one Fresnel lens. The distance between the Fresnel lens and reflector can be changed depending on the distance between the lamp and reflector according to the controlled angle of the aperture of the searchlight beam. The Fresnel lens has circular diffusion screen mounted at the center of the lens. The Fresnel lens and the screen define a system for shifting light, which allows the fraction of the diffused light to be changed, and the Fresnel lens has real point of focusing that can be set in coincidence with the focusing point of the reflector. The reflector focusing point is located far from the reflector. The Fresnel lens represents a flat-convex collecting lens and has double lens with chromatic-corrected projection properties. The coating of the Fresnel lens has a system of dielectric interference layer that changes the spectrum of the light passing through it. The auxiliary reflector is interposed between the Fresnel lens and reflector.

EFFECT: enhanced efficiency.

19 cl, 6 dwg

The invention relates to a light-diffusing means, intended for use in traffic lights, which is projected (almost parallel) light beam on unpainted or painted (red, yellow, green) surface with elementary light diffusing elements to scatter light within the boundaries of certain specified limits

FIELD: transport.

SUBSTANCE: invention relates to vehicle lighting equipment mounted outside and composed of multicellular head or tail lights. Proposed light source comprises case, diffuser and optical system. The latter comprises, at least, one unified optical module and optional built-in cell with appropriate cat's eye. Unified optical module allows the functions of single or combined light and is built around one-piece high-power LED with reflecting secondary optics composed of aspheric lens. Outer light-emitting surface of aspheric lens is composed of a set of 2nd-order surfaces with linear sizes commensurable with linear sizes of optical module.

EFFECT: expanded operating performances.

8 cl, 2 dwg

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