Lighting device, display device and television receiver

FIELD: electricity.

SUBSTANCE: invention relates to the field of lighting equipment. A highlighting unit 12 consists of a LED 17, a chassis 14 including a base plate 14a mounted at the side opposite to the side of the light output in regard to the LED 17, at that the chassis 14 contains the LED 17 and the first reflective sheet 22 that reflects light. The first reflective sheet 22 includes a four-sided base 24 running along the base plate 14a and two elevated portions 25 and 26, each of these portions is elevated from each of two adjacent sides of the base 24 in direction of the light output. There is a junction J between two adjacent side edges 25a and 26b of the elevated portions 25 and 26. In the highlighting unit 12 the side edge 25a of the first elevated portion 25 out of the two elevated portions 25 and 26 has a face piece 28 faced to the side edge 26a of the elevated portion 26 in the same direction in which the first elevated part 25 is elevated from the base 24 outside towards axis Y, and the first elevated part 25 and the face piece 28 are extruded towards direction of the light output.

EFFECT: elimination of uneven brightness.

22 cl, 29 dwg

 

The technical FIELD

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

The LEVEL of TECHNOLOGY

For example, a liquid crystal panel for liquid crystal display device such as LCD TV, does not emit light and thus, the backlight unit is required as a separate lighting device. A backlight unit that is provided on the rear side (side opposite to the display surface) liquid crystal panel, includes: chassis, which is open on the side close to the liquid crystal panel; a light source placed in the chassis; a reflective sheet provided along the inner surface of the chassis and configured to reflect light in the direction of the opening of the chassis; and an optical element (such as a diffuser sheet)provided in the opening of the chassis and configured for efficient direction of light emitted from a light source on the liquid crystal panel.

To save power, or the like, configured above the device backlight LED (light emitting diodes) can be used as a light source. In this arrangement of the backlight using LEDs, composed of a large number of LEDs, for example, on the base plate of the chassis Planernoe layout. However, when the light emerging from the backlight unit, it is observed from the front side, the dark zone, due to the shortage of the amount of light can be observed in the four corners of the screen.

As one of the solutions for the above problems, the technology disclosed in Patent document 1 described below.

Patent document 1: Publication No. 2006-120644 unexamined Japan patent

The PROBLEM WHICH MUST BE SOLVED by the INVENTION

The above-mentioned Patent document 1 discloses that the number of LEDs arranged on the base plate of the chassis in the planar layout is large near the corners than in the middle part. With this arrangement increased the number of LEDs emits light in the vicinity of the corners, and, thus, lack the amount of light in the corners properly compensated.

However, the technology disclosed in the above Patent document 1, has the consequence of increasing the total number of LEDs used in the backlight unit, and, thus, cost of production will increase in accordance with increase in the number of LED. In addition, in order to change the number of LEDs depending on the provisions of the LEDs in the chassis, you Want the LEDs were arranged on the Board LED a disproportionate manner that requires special Board LED. the respectively, Board LED General application, which LED built runatload not suitable for use, which shall result in an additional increase in the cost of production.

The DISCLOSURE of the PRESENT INVENTION

The present invention was made in view of the foregoing circumstances, and the purpose of the present invention is to limit the uneven brightness at low cost.

A MEANS FOR SOLVING PROBLEMS

The lighting device according to the aspect of the present invention includes: a light source; a chassis comprising a base plate provided on the side opposite to the light output relative to the light source, the chassis comprises a light source; and a reflective element configured to reflect light, and includes a rectangular portion of the base and at least two raised portions. Part of the Foundation arranged along the base plate, and each of the at least two raised portions raised from at least two adjacent sides of the base toward the exit side of light, and each raised portion has a side edge, and two raised parts form a joint between adjacent two side edges of the raised parts. In the lighting device, at least two solder is taken part include one raised portion and another raised portion, and one raised portion includes a front portion at its lateral edge so as to contact the side edge of the other raised portion relative to the direction directing from the base to the one raised portion and one raised portion and the front portion protrude toward the side of the output light.

According to this configuration, by reflection of light from a light source, a reflective element comprising a base and a raised portion, the light goes efficiently. At the reflective element, a junction between adjacent lateral edges of at least two raised portions, the raised to the side of the light output from at least two adjacent sides of the rectangular base. If elevated spots of warp and deform in the opposite direction to the output side of light, may form a butt joint. The light properly can leak through the gap and, thus, may locally form a dark area. One solution to this problem, for example, is to increase the number of LEDs in the vicinity of the junction. However, increasing the number of LEDs leads to increased cost.

According to the aspect of the present invention, the lateral edge of one of the raised part of the at least two raised portions, provided with the front is the actu, facing to the side edge of the other raised portion in the direction where one raised portion rising from the base, and one raised part and the front part of the bulge to the side of the light output. Therefore, the lateral edge of the other raised portion receives mechanical stress, which shifts the other raised portion toward the side of the light output from the front part, which is designed to appeal to another elevated part. Mechanical stress applied from the front side, restricts another raised part of the deformation in the direction opposite to the direction of light output, and the other raised portion is less likely to deform. Accordingly, a gap is not formed at the junction between a lateral edge of one elevated portion and the side edge of the other raised portion. Thus, without increasing the number of light sources, to prevent light leakage through the joint, and the uneven brightness is eliminated at low cost.

In the aspect of the present invention may be applied to the following configuration(s).

(1) the Base can be elongated quadrangular, and another raised part can be lifted from the short side of the base, and one raised portion that includes a front part, can rise from the long side of the base of the Oia. In this configuration, if the longitudinal rectangular base is subjected to thermal expansion due to changes in thermal environment, the base tends to undergo thermal expansion in the direction of a long side to a greater value than in the direction of the short side. Thus, the elevated main position other elevated portion, a raised from the short side, is shifted in accordance with thermal expansion of the base in the direction of the long side, and another raised part is slightly deformed. However, according to the aspect of the present invention, even if thermal expansion occurs, the front part provided at one raised portion, the raised from the long side, restricts another raised portion on the short side from offset in the opposite direction to the output side of the world. It effectively prevents formation of a gap at the junction, and therefore, effectively prevents leakage of light through the gap.

(2) Another raised part can be lifted from each of the pair of short sides of the base, and one raised part can be lifted from each of the pair of long sides of the base, and the front portion may be provided at each of two side edges of each of the paired raised some parts. In this configuration, each and the side edges of each one of the elevated portions, raised from the long sides adjacent to the short sides, provided with a front part, and each of the side edges of each of the other pair of raised parts, raised from the short sides, applied mechanical stress from the corresponding front part. Thus, the other raised portion more reliably restricted from moving in the opposite direction to the output side of the world. Accordingly, a gap is formed in each of the four joints provided between adjacent side edges of the other pair of raised parts and one pair of raised parts, and therefore, effectively eliminated the uneven brightness.

(3) other Pair of raised portions may be rising from the base at an angle of rise, essentially equal to the angle of ascent, which rise from the base of the paired one raised portion. In this configuration, light that is reflected from each of the other pair of raised parts, tilted essentially equally. Similarly, light reflected from each of one pair of raised parts, tilted essentially equally. Accordingly, the light reflection, reflected by reflective element, will exhibit less uniformity, and thus, uneven brightness is additionally removed.

(4) the Lighting device according to the aspect of the crust is asego of the invention may further include an optical element, provided on the side close to the output side of the light relative to the light source. In this lighting device, at least one raised portion may include an elongated portion at its distal edge, and this elongated part can go out, and the chassis may include a receiving plate configured to place an elongated part between itself and the optical element. According to this configuration, for example, if the optical element is mounted on the receiving plate with an elongated part which is separated from the receiving plate, and an elongated portion is held between them, one raised portion is subjected to mechanical stress, which shifts one raised portion to the output side of light. Accordingly, one raised part and the front part of the bulge to the output side of light, and is formed by mechanical stress, which moves the side edge of the other raised portion to the output side of light.

(5) Another raised portion protrudes to the side of the light output together with one raised part and the front part. In this configuration, the other raised portion protrudes to the side of the light output mechanical stress from the front, and it reliably restricts another raised portion from moving in the direction across the lagoon to the false side of the light output. Accordingly, a gap is less likely should be formed at the interface, and thus, the light leakage is effectively prevented.

(6) the Basis and one raised portion can form the boundary of which is bent with a bend, and one raised portion and an elongated portion forming a boundary which is curved without bend. With this configuration, in which the boundary between one raised portion and an elongated curved part without the bend, one raised part will take a relatively greater mechanical tension when stretched part is placed between the optical element and the receiving plate, compared with the configuration in which the border is bent at the bend provided at the same border. Thus, stress applied from the front side to the side edge of the other raised portion also increases, and therefore, the other raised portion more reliably restricted from moving in the opposite direction to the output side of the world. Accordingly, a gap is less likely should be formed at the interface, and thus, the light leakage is effectively prevented.

(7) From the boundary between the base and one raised part and the boundaries between one raised part and the extended part, the boundary between the base and one raised part can be provided with grooves, which is contribute to the formation of the bend. In this configuration, when one raised portion rising from the base, bend easier is formed by the notch on the border, and, thus, one raised portion is easily formed in the desired configuration. On the other hand, the boundary between one raised part and the extended part is not provided with a notch, and therefore, the fold is not formed easily. Thus, if the elongated portion is placed between the optical element and the receiving plate, the mechanical stress can be securely attached to one of the raised part.

(8) Other elevated portion may include an elongated portion at its distal edge, and an elongated part can go outside, and the ground and the other raised portion form the boundary, and the other raised portion and an elongated portion forming a border, and each of the boundaries may be provided with a recess, which contributes to the formation of the bend. In this configuration, when the other raised portion rising from the base, and when the elongated portion is placed on the receiving plate, bends easily formed at the boundaries by means of grooves. Accordingly, the configuration of the other raised portion can be stabilized, and the front part of one of the raised part can be easily and reliably positioned to contact the side edge of the other raised portion. Thus, fur the technical voltage from the front of reliably applied to other elevated part.

(9) the Notch may include perforations arranged linearly at intervals. In this configuration, the recess (perforation) are formed at low cost during manufacturing of the reflective element.

(10) the Front part may be provided to cover the entire length of the side edges of one of the raised part. In this configuration, the front portion provided to cover the entire length of the side edges of one of the raised part, can put stress to other elevated portion. Therefore, the other raised portion more reliably restricted from moving in the opposite direction to the output side of light, and a gap is less likely should be formed at the interface.

(11) Raised part can be tilted with respect to the base. In this configuration, the raised parts serve to reflect light toward the output side of light at a favorable angle.

(12) Raised portions may be formed to be essentially linear. In this configuration, the raised parts serve to reflect light toward the output side of light at a more favorable angle.

(13) the Chassis may further include a side plate, which rises from the base plate, and side plate defines a space with raised parts and asana to the raised parts. According to this configuration, since a space is provided between the other of the raised part and the side plate, the other raised portion of the bit can move as if receding into space. However, the front part provided at the side edges of one of the raised part can effectively limit the above offset other elevated part, and, thus, prevents light leakage through the joint.

(14) the light Source can be LED. In this configuration, can achieve high brightness, energy saving, and the like.

(15) the LED may include multiple LEDs, and the LED can be installed on Board LED, which continues parallel to the base plate and the base. When installing multiple LED Board, LED you to link on-Board LED disproportionate manner as was done in the known techniques, in order to assemble a greater number of LEDs in the vicinity of the junction. Thus, the need to manufacture special Board LED, which leads to increased cost. However, by providing the front portion of the side edges of one of the raised part of the reflective element, the use of such known techniques can be avoided. Thus, for example, can be used for card LEDs General application, to the x LED line up intervals. Accordingly, achieves an additional reduction of the cost price.

(16) the Lighting device according to the aspect of the present invention may further include a diffusing lens, provided on the exit side of the light relative to the LED and configured for scattering light from the LED and output light from it. In this configuration, light emitted from the LED, diffused scattering lens and excreted through the diffusing lens. Accordingly, all of the light demonstrates less uneven, and the number of LEDs is reduced, and it seeks to reduce costs.

(17) the Lighting device according to the aspect of the present invention may further include an optical element, provided on the exit side of the light relative to the light source. In this lighting device, the chassis may include a portion facing to the optical element, and the part can be divided into assembled with the light source area, in which are arranged a light source, and an empty area in which no compiled a single source of light, and the optical element may include a portion that overlaps arranged with the light source area, and the portion that overlaps the empty area, and the light reflecting ability may be higher on at the ore surface part, overlapping arranged with the light source area facing the light source than at least the surface portion that overlaps the empty area. In this configuration, light emitted from the light source, first reaches the region of the optical element that exhibits a relatively large light reflecting ability, and most of the light is reflected (i.e., most of the light is not passed through the optical element). Thus, the brightness of light of the backlight is fixed in relation to the amount of light emitted from a light source. On the other hand, the light reflected, as described above, is reflected by reflective element in the chassis to be sent to an empty area. The plot of the optical element that overlaps the empty area shows the relatively smaller the light reflecting ability and transmits more light. Thus, it is a light illuminator having a predetermined brightness.

(18) the Chassis may include a portion facing to the optical element, and the part can be divided into at least a first edge area, a second boundary of land located on the edge opposite the first edge section, and the middle portion provided between the first boundary section and the second boundary section. The middle portion may correspond to the RMS of ponovno with the light source area, and the first boundary section and the second boundary area may correspond to an empty area. In this configuration, a sufficient brightness is reliably provided in the middle part of the lighting device, and thus, the display device comprising the lighting device as reliably achieves the brightness at the middle section of the display. Therefore, it appears good visibility.

(19) the light Source may be a cold cathode lamp. In this configuration, achieves a longer service life, and easy is the reduction of light intensity.

(20) the light Source may be a lamp;. Respectively, achieved increased brightness, and the like.

To solve the above problems, the display device according to another aspect of the present invention includes: the above-described lighting device; and a display panel, adapted to display using light from the lighting device.

In this configuration, the lighting device that supplies light to the display panel, suppress uneven brightness at low cost, and it achieves excellent image quality with low cost.

The liquid crystal panel may be used as the display panel. Configured above us is the display device is applicable as a liquid crystal display device for some applications, such as applications in display devices for television receivers or personal computers. More precisely, configured above, the display device preferably applicable for use in display devices with a large screen.

A USEFUL RESULT of INVENTIONS

According to aspects of the present invention, the uneven brightness is limited at low cost.

BRIEF DESCRIPTION of DRAWINGS

Fig. 1 is a perspective view with a spatial separation of the parts, schematically illustrating a television receiver according to the first exemplary variant of the implementation according to the aspect of the present invention;

Fig. 2 is a perspective view with a spatial separation of the parts, schematically illustrating the liquid crystal display device included in the television receiver;

Fig. 3 is a top view depicting the layout of the circuit Board LED, the first reflective sheet and the retaining elements in the chassis of the liquid crystal display device;

Fig. 4 depicts a cross-section of the liquid crystal display device according to Fig. 3, taken along cut iv-iv;

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

Fig. 6 is a top view depicting a detailed layout of the circuit Board LED and holding ale is now;

Fig. 7 depicts a cross-section according to Fig. 6, taken along the line segment vii-vii.

Fig. 8 depicts a cross-section according to Fig. 6, taken along the line segment viii-viii.

Fig. 9 is an enlarged top view showing the angle of the chassis, where the first curved reflective sheet is installed in the chassis, and attached plate diffuser;

Fig. 10 depicts a top cross-section in Fig. 9;

Fig. 11 depicts a cross-section according to Fig. 6, taken along the line segment xi-xi;

Fig. 12 depicts a cross-section according to Fig. 6, taken along the line segment xii-xii;

Fig. 13 is a top view depicting a detailed first reflective sheet;

Fig. 14 depicts a cross-section according to Fig. 13, taken along the line segment xiv-xiv;

Fig 15 shows the section according to Fig. 13, taken along the line segment xv-xv;

Fig. 16 is an enlarged top view showing the angle of the chassis, where the first curved reflective sheet is installed in the chassis, but before the attached plate of the diffuser;

Fig. 17 depicts a top cross-section in Fig. 16;

Fig 18 shows the section according to Fig. 13, taken along the line segment xviii-xviii;

Fig 19 shows the section according to Fig. 13, taken along the line segment xix-xix;

Fig. 20 is a top view in cross section depicting a second raised portion, when the first reflective sheet is subjected to thermal expansion;

Fig. 21 is a top view depicting the layout of the lamp; and a reflection sheet in a chassis according to the second exemplary variant of the wasp is estline according to the aspect of the present invention;

Fig 22 shows the cross-section in Fig. 21, taken along the line segment xxii-xxii;

Fig. 23 is a top view to explain the distribution of the light reflecting ability of the diffuser plate;

Fig. 24 is an enlarged top view of the principle and schematically depicting the plate surface of the lens opposite the lamp; an;

Fig. 25 depicts a graph to indicate changes light reflecting ability in the direction of the short side plate of the diffuser;

Fig. 26 is a top view depicting the layout of lamps, cold cathode and the reflective sheet in a chassis according to a third exemplary variant of the implementation according to the aspect of the present invention;

Fig. 27 is a top view in cross section depicting the mutual position between the first raised part, the second raised part and the opposite part one first exemplary variant of the implementation according to the aspect of the present invention;

Fig. 28 depicts a cross-section of the first raised portion and the extension is deployed first reflective sheet on another second exemplary variant of the implementation according to the aspect of the present invention; and

Fig. 29 depicts a cross-section of the second raised portion and the extension is deployed first reflective sheet.

The BEST OPTION of carrying out the INVENTION

<First variations is t implementation>

The first rough version of the implementation according to the aspect of the present invention will be described with reference to Fig. 1 through 20. In this exemplary embodiment, an example will be described liquid crystal device 10 of the display. Part of the attached drawings indicate the X-axis, Y-axis and Z-axis, in which each axial direction coincides with the direction indicated on the drawings. The upper side in Fig. 3 and 4 are front side along with the fact that the lower side on the rear side.

As is shown in Fig. 1, the television receiver TV according to this exemplary variant implementation includes: the liquid crystal device 10 display; front and rear compartments Ca and Cb, which are placed in the middle of the LCD device 10 of the display to accommodate the liquid crystal device 10 of the display; a source of P nutrition; T tuner; and a stand S. the Liquid crystal device 10 of the display (display device), which is generally transverse to the (extended) quadrangular (rectangular), placed vertically in a standing position. As is shown in Fig. 2, the liquid crystal device 10 display includes: a liquid crystal panel 11, which serves as the display panel; and a block 12 of the backlight (lighting device), which is used for the operation of the external light source. The frame 13 having the shape similar to the frame, and other components retain and combine the liquid crystal panel 11 and block 12 of the backlight together.

Next, there will be one after the other described liquid crystal panel 11 and block 12 of the backlight included in the liquid crystal device 10 of the display. The liquid crystal panel 11 (a display panel), which is transversely rectangular in a planar projection is configured so that a pair of glass substrates joined together with a predetermined gap left between them, and liquid crystal is enclosed between the glass substrates. The first glass substrate equipped with: switching components (for example, TFT (thin film transistors)connected to stokovoj wiring and gate wiring, orthogonal to each other; a pixel electrode connected to the switching component; and in addition, the alignment film, and the like. On the other hand, the second glass substrate equipped with: a color filter in which color sections, such as sections of R (red), G (green) and B (blue)are in a predetermined orientation; protivoelektrodom; and in addition, the alignment film and the like. A polarizing plate is provided outside of the two glass substrates.

It will then detail the written block 12 of the backlight. As is shown in Fig. 2, block 12 of the backlight includes: essentially having the shape of a box chassis 14 having an aperture 14b on the side of the output light (the side of the liquid crystal panel 11); a group of optical element 15 (plate 15a of the lens (light diffuser) and a plurality of optical sheets 15b provided between the plate 15a of the lens and the liquid crystal panel 11)provided to cover the opening 14b of the chassis 14; and a frame 16, is placed to adhere to the outer periphery of the chassis 14 and to hold the outer periphery of the group of optical element 15 through prokleivanija with the chassis 14 of the outer periphery of the optical element group 15. In addition, the inner part of the chassis 14 includes: LEDs 17 (light emitting diode)serving as a light source; charge 18 LED, mounted with LEDs 17; and diffuser lens 19, is attached to the circuit Board 18 and the LED at the position of the LED 17. The inner part of the chassis 14 additionally includes: a holding element 20 adapted to hold the chassis 14 Board 18 LEDs; and a reflective sheet 21, which reflects light in the chassis 14 on the optical element 15. In block 12 of the backlight side, near to the optical element 15 relative to the LED 17, serves as the output side of the world. In the following description will detail the components of the unit 12 p is tsvetki.

As is shown in Fig. 3 through 5, the chassis 14, which, as an example, made of metal, includes: plate 14a of the base, which is transversely quadrangular (rectangular), like the liquid crystal panel 11; the side plate 14c, which rises from the outer edges of the sides (a pair of long sides and a pair of short sides) of the plate 14a of the base toward the front side (the output side of light); and the receiving plate 14d, which extend outward from the upright edges of the side plates 14c. In its entirety, the chassis 14 has essentially the form of a shallow box (essentially a shallow dish-shaped form), which is open towards the front side. The long side of the chassis 14 continue in the same direction as the X direction (transverse direction), along with the fact that its short side is continuing in the same direction as the Y axis direction (vertical direction). Receiving plate 14d of the chassis 14 is adapted to be mounted to the frame 16 and the optical element 16 (described below) from the front side. The frame 16 is mounted on the take-charge 14d screws. Plate 14a of the chassis 14 is provided with a mounting hole 14e, adapted to seal with the holding element 20. Mounting hole 14e is configured, from the condition that the lot is rainich holes 14e were provided for the plate 14a of the base, respectively, in positions corresponding to the mounting positions of the retaining elements 20.

As is shown in Fig. 2, the optical element 15 is transversely quadrangular (rectangular) in a flat projection, like the liquid crystal panel 11 and the chassis 14. As is shown in Fig. 3, by setting the outer periphery of the optical element 15 on the receiving plate 14d, the optical member 15 covers the opening 14b of the chassis 14 along with insert between the liquid crystal panel 11 and the LED 17. The optical element 15 includes: a plate 15a of the lens located on the rear side (the side of the LED 17, that is, the opposite side of the output light; and the optical sheets 15b arranged on the front side (side of the liquid crystal panel 11, that is, the output side of light). Plate 15a of the lens, which is configured from the condition to some number of scattering particles were spread in a substantially transparent polymeric base substrate having a predetermined thickness adapted to disperse light passing through the plate 15a of the lens. The optical sheets 15b are sheets having a smaller thickness than the plate 15a of the lens. In Fig. 7 and 8 two layered optical sheet 15b. Examples of the optical sheets 15b are sheets of diffuser sheets lenses and polarizing reflective sheets is about type. In use, the optical sheets 15b can be selected from the above examples as needed.

As is shown in Fig. 2, the frame 16 is a frame, which corresponds to the outer perimeters of the liquid crystal panel 11 and the optical element 15. The frame 16 is adapted to place between themselves and the receiving plate 14d of the outer periphery of the optical element 15 (see Fig. 4 and 5). Moreover, the frame 16 is also adapted to be mounted with the outer periphery of the liquid crystal panel 11 from the rear side, of the conditions to the outer periphery of the liquid crystal panel 11 is placed between the frame 16 and frame 13 mounted on the liquid crystal panel 11 from the front side (see Fig. 4 and 5).

Next will be described the LED 17 and the card 18 LED with integrated LED 17. As is shown in Fig. 7 and 8, the LED 17 is designed, from the condition that the crystal LED, using a polymer material, was hermetically sealed to the substrate attached to the circuit Board 18 LED. Crystal LED mounted on the substrate that emits light of one fundamental wavelength radiation. More precisely, in use is crystal LED, which emits monochromatic light blue color. On the other hand, a polymeric material adapted for sealing crystal LED, smiling with a fluorescent substance, from the condition that f is uorescent substance was recordatorio polymeric material. Fluorescent substance converts blue light emitted by the crystal, LED, white light. With this arrangement, the LED 17 is configured to emit white light. The LED 17 is the so-called top emission, whose surface emission is opposite to the surface mounted on the Board 18 LED (surface emission directed toward the optical member 15).

As is shown in Fig. 3 and 4, the card 18 LED has a base substrate, transversely rectangular in a planar projection. The long side of the card 18 LEDs continue in the same direction as the direction of the axis X, along with the fact that its short side is continuing in the same direction as the direction of the axis Y. In the above orientation, the card 18 C placed in the chassis 14 so as to continue along the plate 14a of the base. Basic element Board 18 LED, like the chassis 14 is made of metal, such as one based on aluminum material. The front surface of the Board 18 LED provided with a wiring pattern made of a metal film such as copper foil, inserting the insulating layer. Alternatively, the base element Board 18 LED can be made of an insulating material such as ceramics. The front surface (surface facing the optical member 15) of the base element Board 18 LED subjected to a surface installation is ke LED 17, configured as above. The LED 17 is configured from a condition that many LED 17 were placed near linearly along the direction of the long side (X axis direction) of the card 18 LED and connected in series with each other by drawing wiring Board 18 LED. The steps in the link LED 17 is essentially constant. In other words, the LEDs 17 are arranged runatload way. In addition, both longitudinal edges of the Board 18 LED fitted with connectors 18a.

As is shown in Fig. 3, described above fee 18 LED configured from a condition that many boards 18 LED was placed next in the direction of X-axis and Y-axis within the chassis 14, with its long and short sides, built respectively in the same directions. In other words, the card 18 LEDs and the LEDs 17 mounted on them, housed in the chassis 14 so as to form a matrix (placed in a flat layout)in which the X direction (the direction along the long sides of the chassis 14 and the circuit Board 18 LED) is coincident with the direction of row of the matrix along with the fact that the Y axis direction (the direction along the short sides of the chassis 14 and the circuit Board 18 LED) is coincident with the direction of column of the matrix. More precisely, in the chassis 14, three Board 18 LED in the direction of the X axis and nine boards 18 LED in the Y axis direction are arranged in the immediate vicinity, therefore, twenty-seven boards 18 LED in the end, is arranged in the immediate vicinity of it. Board 18 LED, which is placed next in the direction of the X axis for forming line, electrically connected to each other boarding the connection of adjacent pairs of connectors 18a. In addition, the connectors 18a, located to correspond to both ends of the X-axis of the chassis 14, is electrically connected to an external control circuit (not illustrated). With the above arrangement, the LED 17 is placed in forming a single row of boards 18 LEDs, connected in series with each other, and a large number of LEDs 17 included in a single string, using a single control circuit, a controlled manner on and off with a single action. Thus, the achievable reduction in cost. In addition, the steps in PCB layout 18 LEDs which are arranged in the Y axis direction, essentially equal. Accordingly, the LED 14, placed in a flat layout along plate 14a of the base chassis 14, essentially equidistant placed side by side in the direction of the X axis and the direction of the y axis.

Diffuser lens 19 is made of essentially transparent (capable of excellent light transmission) of synthetic polymer material having a higher refractive index than air (such as polycarbonate or acrylic). As is shown in Fig. 6 through 8, the diffuser lens 19, which has a predetermined thickness, is essentially rugley in a flat projection. Diffuser lens 19 is attached to the circuit Board 18 LEDs to cover the LED 17 separately from the front side (i.e., superimposed on top of the LED in a flat projection). Diffuser lens 19 is adapted for scattering of highly directional light emitted from the LED 17, and the release of light. In other words, the light emitted from the LED 17, and reduces its orientation while passing through the diffusing lens 19. Thus, even when the distance between the adjacent LEDs 17 is increased, the area between the adjacent LEDs 17 are less probably be recognized as dark areas. With this arrangement, the number of LEDs 17 is the minuend. Diffuser lens 19 is situated essentially concentrically with the LED 17 in a flat projection.

In scattering lens 19, the surface turned back to sit in front of the Board 18 LED (LED 17), provides the surface 19a of incidence of light through which is incident light from the LED 17, along with the fact that the surface is facing forward, to be placed opposite the optical element 15 provides a surface 19b of the light output through which the light comes. As is shown in Fig. 7 and 8, the surface 19a of light incidence, in General, adhere to the plate surface of the Board 18 LED (in the directions of X-axis and Y-axis). However, the recess 19c of incidence of light provided at the surface 19a of incidence of light in the position to which e must be superimposed over the LED 17 in a flat projection, provides an inclined surface that is inclined relative to the optical axis LA of the LED 17. The recess 19c of incidence of light is essentially conical, having the form of inverted V cross-section, and is situated essentially concentrically with diffuser lens 19. The light emitted from the LED 17 and penetrating into the recess 19c of incidence of light, refracted inclined surface at a large angle to be incident on a scattering lens 19. In addition, the leg 19d mounting adapted to be attached to the circuit Board 18 LED, speaker of the surface 19a of incidence of light. Surface 19b of the light output, which is essentially flat-spherical, is adapted to break at a large angle of light produced by scattering from the lens 19, and produces light through it. Surface 19b of the light output has an essentially Cup-shaped recess 19e light output in the position that superimposes on top of the LED 17 in a flat projection. The recess 19e light output, most of the light from the LED 17 is configured to cooperate with and be produced at a large angle, or the light from the LED 17 is partially reflected at cost 18 LED.

Then will be described retaining element 20. The retaining element 20 is made from a synthetic polymer, such as polycarbonate, and its surface is white that is excellent in terms of light reflecting able to the STI. As is shown in Fig. 6 through 8, the retaining element 20 includes: a main body 20a, which adheres to the surface of the plate Board 18 LEDs; and a fixed portion 20b which projects from the main portion 20a to the rear side (i.e., to the chassis 14)to be attached to the chassis 14. The main part 20a having essentially the shape of a round plate in the flat projection, adapted for space between itself and the plate 14a of the chassis 14 Board 18 LED and described later reflective sheet 21. Fixed portion 20b must be blocked by plate 14a of the chassis 14 by threading through the opening 18b of the insert and the mounting hole 14e. A through hole 18b of the insert and the mounting hole 14e, respectively, provides the Board 18 LED and plate 14a of the base at positions corresponding to the mounting positions of the retaining element 20. As is shown in Fig. 3, the retaining element 20 is configured from a condition to a large number of retaining elements 20 have been placed within the planes of the circuit boards 18 LED to formation of the matrix. More precisely, the retaining elements 20 are located between pairs of the diffuser lenses 19 (LEDs 17), which are adjacent to each other in the direction of the x axis.

As is shown in Fig. 2 through 4, the retaining elements 20 a pair of retaining elements 20 located near means the screen provided with supports 20c, which protrude from the main parts 20a toward the front side to back plate 15a of the lens with the rear side supports 20c. With this arrangement, the LED 17 and the optical element 15 is configured to maintain constant their mutual arrangement relative to the direction of the Z axis, and thus prevents unintentional deformation of the optical element 15.

The following describes the reflective sheet 21. The reflective sheet 21 includes: a first reflective sheet 22, endowed with sizes to cover essentially the entire weight of the inner surface of the chassis 14; and the second reflective sheet 23, endowed with sizes that individually cover charge 18 LED. The reflection sheets 22 and 23 are both made of a synthetic polymer, and their surfaces are white, which is excellent in the indicators light reflecting ability. The reflection sheets 22 and 23 are both adapted to continue along the plate 14a of the base (PCB 18 LED) within chassis 14.

First will be described the second reflective sheet 23. As is shown in Fig. 6 through 8, the second reflective sheet 23, cards like 18 LED, on which is laid a second reflective sheet 23 is perpendicular rectangular in planar projection, and adapted to cover essentially all the fullness of the circuit Board 18 LEDs the front side. The second reflective sheet 23 superimposed over the front surfaces of the circuit boards 18 LED and, thus, is to be converted to scattering lens 19. In other words, the second reflection sheet 23 is inserted between the diffuser lenses 19 and cards with 18 LEDs. Accordingly, the second reflection sheet 23 is used for repeated reflection on the scattering of the lens 19 of the light returned from the diffuser lens 19 on Board, 18 LED, and the light falling outside of the diffuser lenses 19 in the space between the diffuser lenses 19 and cards with 18 LEDs in a flat projection. With this arrangement, the light utilization efficiency is improved and, thus, increases the brightness. In other words, even when the number of LEDs 17 is reduced to reduce cost, achievable sufficient brightness.

As is shown in Fig. 8, the short side of the second reflective sheet 23 is endowed with the sizes to be larger than the circuit Board 18 LED and diameters diffuser lenses 19 and holes 22a insert lenses described later, the first reflective sheet 22. Accordingly, the periphery of the holes 22a of the insert lens located on the front surface of the second reflective sheet 23 by means of layers of the first reflective sheet 22 on the front surface of the second reflective sheet 23. With this arrangement, the first reflection sheet 22 and the second otrajat the local sheet 23 without sharp transitions and continuously continue in the chassis 14 in a flat projection, and the chassis 14 or Board 18 LED almost not open on the front side of the through hole 22a of the insert lenses. Accordingly, this arrangement effectively reflects the light inside the chassis 14 on the optical element 15, which significantly increases the brightness. The second reflective sheet 23 has holes 23a insert the LED, which penetrate through the LED 17; holes 23b insert the legs through which penetrate legs 19d mounting diffuser lenses 19; and holes 23c of the insert, which penetrate through the mounting part 20b of retaining elements 20. Holes 23a insert the LED holes 23b of the insertion legs and holes 23c insert drilled in the second reflection sheet 23 in the provisions, which should be superimposed on top of the LED 17, the legs 19d mounting and fixed parts 20b in a flat projection.

Then will be described in detail first reflective sheet. As is shown in Fig. 3, a large part of the first reflective sheet 22, which continues along the plate 14a of the chassis 14, provides the base 24. The base 24 is transversely (elongated) quadrangular (rectangular), similar to the plate 14a of the chassis 14. The longest side of the base 24 continue in the same direction as the direction of the axis X, along with the fact that its short side is continuing in the same direction as the direction of the axis Y. the Base 24 has openings 22a insert Lin is, through which not only LED 17 are housed in the chassis 14, but also inserted dispersing lenses 19 covering the LED 17. Within the base 24, with a number of holes 22a insert lenses provided when placing next in the regulations should be imposed on top of the LED 17 and diffuser lenses 19 in flat projection, thereby forming a matrix.

As is shown in Fig. 6, the holes 22a insert lenses are all in a flat projection, and their diameters are endowed with sizes to be larger than the diameters of the diffuser lenses 19. With this arrangement, when the layering of the first reflection sheet 22 in the chassis 14, the scattering of the lens 19 can be reliably pass through the openings 22a of the insertion of the lenses, regardless of the error size. As is shown in Fig. 3, the first reflection sheet 22 covers areas that are inserted between adjacent pairs of the diffuser lens 19 and the outer peripheral zones of the diffuser lens 19 in the chassis 14. Thus, the first reflection sheet 22 serves to reflect light on these areas in the direction of the optical element 15. In addition, the base 24 of the first reflection sheet 22 has openings 22b of the insert, through which penetrates the fixed portion 20b of retaining elements 20. Holes 22b of the insert is drilled in the base 24 in the regulations should be imposed on top of the fixed parts 20b in a plane about the options.

As is shown in Fig. 3 through 5, the first raised part 25 (one raised part) rise from the pair of long sides of the base 24 of the first reflective sheet 22 toward the front side (i.e. the side of the light output), along with the fact that the second raised portion 26 (the other raised portion) rise from a couple of his short sides toward the front side (i.e. the side of the light output). The first raised part 25 protrude outward in the Y axis direction of the long sides of the base 24 in a flat projection. In other words, a pair of first raised portions 25 is to insert the base 24 between them with respect to the direction of the axis Y. the Second raised portion 26 protrude outwards in the direction of the axis X of the short sides of the base 24 in a flat projection. In other words, the pair of second raised portions 26 is to insert the base 24 between them with respect to the direction of the axis X. the Long side of the base 24 are interconnected with a pair of short sides, while its short sides are contiguous with a pair of long sides. Accordingly, the first raised part 25, elevated from the long sides of the base 24 are adjacent to the pair of second raised portions 26, along with the fact that the second raised portion 26, raised from the short sides of the base 24 are adjacent to the pair p is pout raised portions 25. The direction in which the first raised part 25 climb from the base 24, coincides with the direction of the axis Y. on the other hand, the direction in which the second raised portion 26 rise from the base 24, coincides with the direction of the axis X. In the first reflective sheet 22, both of the first and second raised portions 25 and 26 continue outward from the center (inner part) of the first reflective sheet 22. In addition elevated the distal edge of the raised portions 25 and 26 provided with extensions 27, which extend outward. Extension 27 are mounted on the receiving plate 14d of the chassis 14 and is placed between the receiving plate 14d and plate 15a of the lens.

The first raised portion 25 and the second raised portion 26 is essentially linearly sloping from the base 24 under a predetermined angle. Thus, the first reflection sheet 22, in its entirety, is essentially Cup-shaped. The angles of ascent, by which a pair of first raised portions 25 rises from the base 24 (i.e., the angles formed by a pair of first raised portions 25 relative to the base 24), essentially equal. Similarly, the angles of ascent, by which a pair of second raised portions 26 rises from the base 24 (i.e., the angles formed by a pair of second raised portions 26 relative to the base 24), essentially equal. When this components is VCE, corners, attached to the light reflection of the first raised portions 25, become essentially equal, along with the fact that the angles given to the light reflection by the second raised portions 26, are also essentially equal to that preferably limits the uneven brightness. The side edges 25a and the side edges 26a, respectively, the first raised portions 25 and second raised portions 26, which are adjacent to each other are adjacent to each other, to ensure that the joints J. the Joints J are formed between the side edges 25a and 26a adjacent raised portions 25 and 26, respectively, and, thus, are located in the four corners of the first reflective sheet 22 (Fig. 3). As is shown in Fig. 9, the joints J is inclined relative to both directions, the X-axis and Y-axis, in a plane of projection. In other words, the joints J adhere to the side edges 25a and 26b adjacent raised portions 25 and 26, respectively. In addition, raised portion 25 and 26, and side plate 14c and the plate 14a of the chassis 14 define essentially triangular space S in the lateral projection, oblique line which coincides with the point raised beveled portions 25 and 26 (see Fig. 4 and 5).

The first reflective sheet 22 is profiled, as above, by bending at predetermined positions of the expanded sheet, forged from krupnoformatnyh the second substrate (not shown) during the manufacturing process. As is shown in Fig. 13, while the first reflection sheet 22 remains expanded sheet, the first raised portion 25 and the second raised portion 26 are essentially trapezoidal in flat projection. Their top of the base (shorter side) are located inside, and each side of the base 24 extends from the upper base, along with the fact that the bottom (longer side)are out, and the extension 27 extending from lower bases. While in the above expanded sheet, the side edges 25a and 26a of the first raised portions 25 and second raised portions 26 respectively inclined relative to both directions, the X-axis and Y-axis, in a plane of projection. While in the above expanded sheet, a predetermined gap is provided between the side edges 25a and 26a adjacent the first raised portions 25 and second raised portions 26, respectively. The gap gradually increases from the compound base region (inner side) towards the elevated distal edge (outer side)to be essentially triangular in planar projection. In addition, the first raised portion 25 is symmetrical relative to the line segment passing through their centers in the Y axis direction, while the second raised portion 26 is symmetrical relative to the line segment being asego through their centers in the direction of the x axis.

Component block 12 of the backlight, the first reflection sheet 22 is large and highly susceptible to thermal expansion component made of a synthetic polymer. Thus, the first reflection sheet 22 has a tendency to expand or contract in a large amount due to thermal expansion or compression. Among other things, the base 24 of the first reflective sheet 22 expands or contracts in the direction along the long sides (the X direction) at a greater value than in the direction along the short sides (the Y axis direction) due to thermal expansion or compression. Accordingly, the provisions of the elevated base edges of the second raised portions 26 in which the second raised portion 26 rise from the short sides of the base 24, a relatively greater shift than the first raised portions 25, raised from its long sides. On the other hand, the raised position of the distal edge of the second raised portions 26 are basically the same, and, lengthening 27, continued from them, placed between the receiving plate 14d and plate 15a of the lens. Therefore, when the first reflection sheet 22 is subjected to thermal expansion, the provisions of the elevated base edges of the second raised portions 26 can significantly shift outwards in the direction of the X axis, h is ordinary to come to a raised distal ends, in line with this, the distance between the elevated base edges and the provisions of the elevated distal margins will be significantly reduced, thereby forming a large bend. With such a large bend, lifted the bottom edge of the second raised portions 26 can be displaced, as if pulled to the rear side (the opposite side of the light output), and the second raised portion 26 can be deformed. When the above followed by a bending deformation is generated in the second raised portions 26, the side edges 26a are to be further away from the side edges 25a of the first raised portions 25, which makes a gap in the joints J. When a gap is introduced in the joints J, light is not reflected in the position of the gap and is subjected to leak from the first reflective sheet 22. Therefore, on the surface of the light output of the block 12 of the backlight, dark areas can be formed locally in its four corners, where the joints J, thereby causing uneven brightness.

In view of the above, the first reflective sheet 22 according to this exemplary variant implementation is configured, from the condition that the side edges 25a of the long sides of the first raised portions 25 were equipped with front portions 28, as shown in Fig. 9 and 10. The front part 28 continues outward in the direction of the Y-axis Boko what's edges 26a of the second raised portions 26; in other words, the front side 28 facing to the side edges 26a, continuing in the direction where the first raised part 25 climb from the base 24. As is shown in Fig. 10 and 11, the first raised portion 25 fitted with the front portions 28 together with the facial parts that protrude to the front side (i.e. the side of the light output). In more detail, the first raised portion 25 and the front part 28, in lateral projection, gradually protrude to the front side, as raised from the base edges and the raised distal edges to the secondary side, thereby forming an arched shape. The first raised portion 25 and the front part 28 protrude to a greater extent in the middle position of the uplifted areas. Inner surfaces of the front portions 28 (the surface facing to the second raised portions 26) adjacent to the end surfaces of the side edges 26a of the adjacent second raised portions 26, thereby putting to the side edges 26a of the mechanical stress, which shifts the side edges 26a toward the front. As is shown in Fig. 12, this stress causes the second raised portion 26, like the first raised portions 25, stuff Hisself out to the front side in an arched shape and restricts the second raised portion 26 from moving, as if pulled to the rear side (shifted outward in the direction of the C-X). In other words, the side edges 26a is restricted from moving in the direction away from the joints J. With this arrangement, even when the first reflection sheet 22 is subjected to thermal expansion, prevents the formation of gaps at the joints J between the first raised portions 25 and the second raised portions 26 and, thus, near joints J prevent the local formation of dark areas (i.e., preventing uneven brightness). In Fig. 11 and 12, point-to-point dotted lines respectively indicate the first raised portion 25 and the second raised portion 26 to the protrusion.

The front part 28 is provided at both of the side edges 25a of the pair of first raised portions 25 and, thus, respectively, are located to correspond to the joints J in the four corners of the first reflective sheet 22 (Fig. 3). As is shown in Fig. 9, the front portion 28 is formed to cover the entire length of the side edges 25a of the first raised portions 25. In addition, the front part 28 are superimposed on top and remain adjacent to the side edges 26a of the second raised portions 26 in the Y axis direction to cover essentially the whole of their length. With this arrangement, the second raised portion 26, essentially throughout its length, are subjected to mechanical stress from facial parts 28, and, thus, the lateral cu is MKI 26a of the second raised portions 26 safer restricted from moving in the direction away from the joints J.

As described above, to the first raised portion 25 and the front part 28 were showing through to the first side, the first reflection sheet 22 according to this exemplary variant implementation is constructed, as described below. The first raised part 25 (including the front part 28) are linear bends 29, extending in the direction of the X axis in terms of their high base edges (i.e., the boundary positions between the base 24 and the first raised portions 25). Boundary areas BP1 between the base 24 and the first raised portions 25 are bent, as shown in Fig. 11. On the other hand, such bends are not provided for in the provisions of the elevated distal edges of the first raised portions 25 (including facial parts 28), that is, the boundary positions between the first raised portions 25 and movements 27. Boundary areas BP2 between the first raised portions 25 and extensions 27 is curved. In order to construct the first reflection sheet 22, as described above, the boundaries between the base 24 and the first raised portions 25, provided with perforations 30 which are adapted to facilitate formation of the bend 29, along with those such perforation is not provided at the boundaries between the first raised portions 25 and movements 27. Accordingly, as shown in Fig. 16 and 18, when the first OTP is rzetelny sheet 22 is deployed, as shown in Fig. 13, is bent, from the condition that the first raised part 25 was tribalise relative to the base 24 along the perforations 30, bends 29 are formed along the perforations 30. In addition, the first raised portion 25 and the extension 27, while essentially collinear with each other, tilted relative to the base 24. Then, by cuddling extensions 27 to the rear side (lower side in Fig. 18) in this state, the first raised portion 25 are subjected to mechanical stress, which shifts the first raised part 25 bulging toward the front side. Therefore, without bending at the boundary between the first raised portions 25 and the extensions 27, the first raised portion 25 bent to stuff Hisself out to the front side (see Fig. 11). At this time, since the boundary areas BP1 between the base 24 and the first raised portions 25 is configured to bend with the bend 29, the effect of mechanical stress applied to the extensions 27, almost reaches the base 24. Thus, the base 24 retains its flat shape corresponding to the plate 14a of the base.

As is shown in Fig. 14, the above set of perforations 30 is configured to penetrate the first reflection sheet 22 and placed near linearly at intervals along lines of bend granicznych positions. With this arrangement, the bends 27 easily formed by bending the first raised portions 25 without removing the first raised portions 25 of the base 24, and thus, the first raised portion 25 easy thibaudia as desired relative to the base 24.

In contrast, as shown in Fig. 12, the second raised part 26 have the bends 31, respectively, in their provisions raised base edges and the provisions of the elevated distal edges (i.e., the boundary positions between the base 24 and the second raised portions 26, and the boundary positions between the second raised portions 26 and movements, respectively). Boundary areas BP3 and BP4, respectively, between the base 24 and the second raised portions 26, and between the second raised portions 26 and the extensions 27 are bendable. In order to construct the first reflection sheet 22, as described above, the boundary between the substrate 24 and the second raised portions 26, and the boundaries between the second raised portions 26 and the extensions 27 provided with perforations 32, similar to those described in the above-described first raised portions 25 (see Fig. 15). Accordingly, by creating a bend 31 along the perforations 32 in the formation of the expanded first reflective sheet 22 in the form in use, the second raised portion 26 can be on lonely relative to the base 24 and the extensions 27, accordingly, under a stable slope angles (i.e., the configuration of the second raised parts will be stabilized, as shown in Fig. 19. With this arrangement, during the ascent of the first raised portions 25 and second raised portions 26, respectively, from the base 24 of the expanded sheet, the front side 28 of the side edges 25a of the first raised portions 25 easily positioned relative to the side edges 26a of the second raised portions 26. Thus, the front portion 28 and side edges 26a safer positioned to be facing each other.

Despite the fact that the first reflection sheet 22 that is deployed as in Fig. 13, is bent, from the condition that his part was bent along the perforations 30 and 32 (this state is hereinafter indicated by reference as "bent"state), the front part 28 continues relatively related to the front side of the inner surface (the surface on the exit side of light) of the second raised portions 26 to the outside in the direction of the X axis (i.e. the direction in which the second raised portion 26 rise from the base 24, as shown in Fig. 17. Elongated distal edge surfaces of the front portions 28 are essentially in the same plane with the rear outer surfaces (surfaces on the side opposite to the light output) of the second prirodna who's parts 26). When the first raised portion 25, and the front part 28 protrude to the front side in this state, and the second raised portion 26, in a similar way, also protrude to the front side in accordance with the protrusion of the first raised portions 25, the second raised portion 26 is displaced inward in the direction of the axis X, as shown in Fig. 10 and 12. Therefore, elongated distal edge of the front parts 28 relative to protrude from the outer surfaces of the second raised portions 26 to the outside in the direction of the x axis.

This rough version of the implementation is configured as above and hereinafter will be described in its operation. First will be described a production method of the first reflective sheet 22. By stamping the large-format substrate to provide a first reflective sheet 22 using molds are aligned with the expanded form of the first reflection sheet 22, the result of the first reflection sheet 22 that is deployed as in Fig. 13. At this time, the perforations 30 and 32 are formed in positions of the bending deployed the first reflective sheet 22. As is shown in Fig. 13 through 15, the perforations 30 and 32 respectively are provided at the boundaries between the base 24 and the first raised portions 25, the boundaries between the substrate 24 and the second raised portions 26, and the boundaries between the second raised parts and 26 and the extensions 27 (i.e., the provisions of the curves), but no perforations are not provided at the boundaries between the first raised portions 25 and the extensions 27, since these boundaries are not subjected to bending. Subsequently, part of the expanded first reflective sheet 22 are bent in the provisions of the bend along the perforations 30 and 32.

In more detail, as shown in Fig. 18 and 19, the first reflection sheet 22 is bent chute at the boundaries, respectively, between the raised portions 25 and 26 and the base 24 (provisions raised base edges), along with the fact that the first reflection sheet 22 is bent crest at the boundaries between the second raised portions 26 and the extensions 27 (provisions raised distal edges). At this time, the side edges 25a of the first raised portions 25 and the side edges 26a of the second raised portions 26 adjacent to each other, to ensure that the joints J, and the inner surfaces of the front portions 28 adjacent to the end surfaces of the side edges 26a of the second raised portions 26 (see Fig. 16 and 17). The front part 28 can easily and accurately connected end-to-end with the side edges 26a, since the configuration of the second raised portions 26 remains stable due to the bend 31 created along the perforations 32 at the boundaries, respectively, between the second raised portions 26 and the base 24, and between the second raised portions 26 and untinen the mi 27 (see Fig. 19). Therefore, achievable superior operational reliability and efficiency. In this state, the front portion 28 remain superimposed and adjacent to the second raised portions 26, covering the entire length of the second raised portions 26 relative to the Y axis direction (see Fig. 16 and 17). On the other hand, no bend is not provided between the extensions 27, continued from elevated distal edges of the first raised portions 25 and the raised portions 25, and extend essentially collinear with the first raised parts (see Fig. 18).

The first reflective sheet 22, is curved as described above are available for use in block 12 of the backlight, which is assembled in the following process. In the production of block 12 illumination, circuit Board 18 LED with pre-assembled LED 17, the scattering of the lens 19, and the second reflective sheet is placed in the chassis 14, and then, the first reflection sheet 22 is placed in the chassis 14. Subsequently, the retaining elements 20 and the optical element 15, in this order, are installed in it. When placing the first reflective sheet 22 in the chassis 14, dispersing lenses 19 are inserted into the corresponding holes 22a of the insert lens base 24, and holes 22b of the insert are connected with the holes 23c of the insertion of the second reflective sheet 23. At this time, as shown in Fig. 19, lengthening 27, prod is lunnye from the second raised portions 26, mounted on the receiving plate 14d, to continue in parallel to them, essentially without any gaps between them. In contrast, as shown in Fig. 18, since there is no bend between the extensions 27, continued from the first raised portions 25 and the first raised portions 25, lengthening 27, continued from the first raised portions 25, collinear with the first raised portions 25, to rise above the receiving plate 14d (to be referred from the receiving plates 14d), thereby being inclined relative to the receiving plate 14d. More, the distance between the extensions 27, continued from the first raised portions 25 and receiving plates 14d, growing from the elongated base edges of the extensions 27 (edges closer to the first raised portions 25) in the direction to the elongated distal edges of the extensions 27, and, in other words, the further continue the extension 27 of the first raised portions 25, the greater becomes the distance. In addition, raised portion 25 and 26, the side plate 14c and the plate 14a is determined essentially triangular space S in the lateral projection. When the retaining elements 20 are installed in the chassis 14 in the above state, the first reflection sheet 22, the second reflection sheet 23 and the circuit Board 18 LED quite restrained with respect to the chassis 14 (smotrite. 7 and 8).

Subsequently, the plate 15a of the lens and the optical sheets 15b, in this order, are mounted on the receiving plate 14d. When installing the plate 15a of the lens at the receiving plate 14d, lengthening 27 must be inserted between the plate 15a of the lens and the receiving plate 14d. However, lengthening 27, continued from the first raised portions 25, which rise above the receiving plate 14d before you installed the plate 15a of the lens (see Fig. 18), pressed to the rear side plate 15a of the lens and deformed to continue parallel to the receiving plate 14d. At this time, the extension 27 is displaced to the rear side of the stronger side of the elongated distal edge than on the side of the elongated base region, in accordance with the distance that the extension 27 is advanced from the receiving plate 14d. When deformation of the extensions 27, the first raised portion 25 are subjected to the application of extensions 27, mechanical stress, which shifts the first raised portion 25 toward the front. Thus, as shown in Fig. 11, the first raised portion 25 are deformed to stuff Hisself out to the front side, thereby forming an arched shape. During this deformation, the boundary areas BP2 between the first raised portions 25 and the extensions 27, bent without forming folds. Due to the deformation of the PE the new raised portions 25, the front portion 28 provided at their side edges 25a, are deformed in a similar way to stuff Hisself out to the front side, thereby forming an arched shape. In this case, the second raised portion 26, which is facing portions 28, are subject to application of the facial parts 28 mechanical stress, which shifts the second raised portion 26 toward the front. Depending on the mechanical strength of the voltage applied at this time, the second raised portion 26 can be deformed to stuff Hisself out to the front side and forming an arched shape, like the first raised portions 25, as shown in Fig. 10 and 12. The second raised portion 26, depending on the strength of the applied mechanical stress, can not be deformed to stuff Hisself out in an arched form. Even when not deformed, the second raised portion 26 take stress, which shifts the second raised portion 26 toward the front. As described above, since respectively subjected to mechanical stress, which shifts the first and second raised parts 25 and 26 to the front side, the first and second raised parts 25 and 26 are restricted from moving to the rear, i.e. in the direction opposite to the direction of light output.

The block 12 of the illumination produced, as is written above, mounted on a separately manufactured liquid crystal panel 11 and is combined with the frame 13, thus produced liquid crystal device 10 of the display. When using the manufactured liquid crystal display devices 10, the LEDs 17 included in block 12 of the backlight, light, and image signals are served on the liquid crystal panel 11. In this configuration, a predetermined image is displayed on the liquid crystal display panel 11. The light emitted by the illuminated LED 17, is first incident on the surface 19a of incidence of light scattering lens 19, as shown in Fig. 7 and 8. At this time, most of the light is incident on the inclined surface grooves 19c of incidence of light, provided the surfaces 19a of incidence of light. The inclined surface then refract light at a large angle according to its angles, and the light is incident on a scattering lens 19. Essentially, the incident light, after passing through the diffusing lens 19, is released from the surfaces 19b of the light output. Surface 19b of the light output, which are essentially flat-spherical, produce light along with the refraction of light at a large angle of its surfaces with a layer of outdoor air. Moreover, since the area of the surfaces 19b of the output light, where the intensity of the Saint is that of the LED 17 is maximized, have essentially Cup-shaped grooves 19e light output and essentially PLANO-spherical peripheral surface, surface 19b of the light output are used for releasing light through refraction of light at a wide angle peripheral surfaces of the grooves 19e light output or serve to reflect light on circuit Board 18 LED. Light returned on Board, 18 LED, is reflected by the second reflective sheet 23 on the scattering lens 19 and is again incident on the scattering lens 19. Because the light is efficiently used, the achievable high brightness.

As described above, the scattering lens 19 are adapted for scattering of highly directional light emitted from the LED 17 is at a large angle. Thus, the light incident on the optical element 15, may be evenly distributed in the plane of the optical element 15. In other words, using the diffuser lens 19, the area between the adjacent LEDs 17 are less visually recognized as dark areas, which gives the distances between the LEDs 17 and the opportunity to grow. With this arrangement, the number of LEDs 17 is reducing along with the restriction of uneven brightness. Because the distance between the adjacent LEDs 17 are increased by reducing the number of LEDs 17, the retaining elements 20 are installed using the saved areas. Thus, the retaining ele the 20 patients reinforce the mounting boards 18 LED.

When the LCD device 10 of the display is in use, as described above, the LED 17 in block 12 of the backlight can be enabled or disabled, that may change in the internal temperature of the environment. In accordance with such changes, the components of the liquid crystal display devices 10 may be subjected to thermal expansion or contraction. Components of the LCD device 10 of the display, the first reflection sheet 22 included in block 12 of the backlight is large highly susceptible to thermal expansion component, made from a synthetic polymer. Thus, the first reflection sheet 22 expands or contracts at a much greater value due to thermal expansion or compression. For example, when the temperature in the block 12 of the illumination rises, and the first reflection sheet 22 is subjected to thermal expansion in accordance with it, the base 24 extends in the long side direction (X-axis direction) at a greater value than in the direction of the short side (Y axis direction). With this extension, the short side of the base 24 (i.e., the position of the elevated base edges of the second raised portions 26) will be largely displaced outwards in the direction of the axis X. on the other hand, the raised position of the distal edges of the second is ripomatic parts 26 are basically the same, moreover, lengthening 27, continued from them, placed between the receiving plate 14d and plate 15a of the lens. Accordingly, the provisions of the elevated base edges of the second raised portions 25 will become closer to provisions raised their distal edges, thereby reducing the distance between them and forming the deflection of the second raised portions 26. When this deflection, the second raised portion 26 can be displaced, as if attracted to the rear side, and deformed.

However, according to this exemplary variant implementation, the second raised portion 26 is exposed to the application, from the end parts 28, mechanical stress, which shifts the second raised portion 26 toward the front. Thus, as shown in Fig. 20, even when the position of the elevated base edges are shifted as described above, the second raised portion 26 is limited from moving, as if attracted to the rear side. With this arrangement prevents the formation of gaps at the joints J between the first raised portions 25 and the second raised portions 26. In Fig. 20, point-to-point dotted lines therein indicate the second raised portion 26 before subjected to thermal expansion. Since the second raised portion 26 are deformed to stuff Hisself out in an arched form (that is, to bend about the Yves direction under consideration, followed by the deflection deformation), thereby forming the tensile stress between the raised base edges and the raised distal edges, more reliably prevents the displacement of the second raised portions 26, as if attracted to the rear side. Moreover, the front part 28, which is provided to cover the entire length of the side edges 25a of the first raised portions 25 are adjacent to the side edges 26a of the second raised portions 26 along with coating the entire length of the side edges 26a. Accordingly, the second raised portion 26 are subjected to the above application of mechanical stress along its entire length.

As described above, even when the first reflection sheet 22 is subjected to thermal expansion, prevents the formation of gaps at the joints J between the first raised portions 25 and the second raised portions 26. Therefore, prevents leakage of light through the at joints J within the inner space defined by the first reflective sheet 22 in block 12 of the backlight. Accordingly, to prevent the local formation of dark areas on the surface of the light output of the block 12 of the backlight at its four corners, where the joints J, and, thus, uniform brightness is achieved in the entire flat surface at the surface of the light output. Since light is extracted from the block 12 of the backlight, konfigurera is h, to be uniform without unevenness, the liquid crystal display device 10 of the display has good display quality.

As described above, the block 12 of the backlight according to this exemplary variant implementation includes: LED 17 serving as a light source; a chassis 14, which includes a plate 14a of the base, opposite side of the light output relative to the LED 17, the chassis accommodates LED 17; and the first reflection sheet 22, is adapted to reflect light, the first reflection sheet 22 includes a rectangular base 24, continuing along the plate 14a of the base, and at least two raised parts 25 and 26, respectively raised from at least two adjacent sides of the base 24 towards the exit side of the light, the joints J are provided between adjacent two side edges 25a and 26b raised portions 25 and 26. In block 12 of the backlight, the side edges 25a of the first raised portion 25 of the at least two raised portions 25 and 25 includes a front portion 28, which is turned to the side edge 26a of the second raised portion 26 in the direction where the first raised portion 25 rises from the base 24 (outward in the direction of the Y axis), and the first raised portion 25 and the front part 28 protrude toward the side of the light output.

P and the layout the light from the LED 17 is reflected by the first reflective sheet 22 having a base and a raised portion 25 and 26, and the light is efficiently produced. In the first reflection sheet 22, between adjacent side edges 25a and 26a of at least two raised portions 25 and 26 that respectively rise up towards the side of the light output from at least two adjacent sides of the rectangular base 24, is provided by the joints J. If the second raised part 26 must be deformed to shift to the opposite side of the light output, gaps can be introduced in the joints J. Accordingly, light can leak through the gaps, thus, can locally be formed dark areas. One solution to this problem, for example, is to increase the number of LEDs 17 in the vicinity of joints J. However, the increase in the number of LED 17 will lead to an increase in cost.

In view of the above, according to this exemplary variant implementation, the side edges 25a of the first raised portion 25 of at least two raised portions 25 and 26 provided with a front part 28, which is turned to the side edge 26a of the second raised portion 26 in the direction where the first raised portion 25 rises from the base 24 (outward in the Y axis direction), and furthermore, the first raised portion 25 and the front part 28 protrude directed by the th to the output side of light. Accordingly, the side edge 26a of the second raised portion 26 is exposed to the application, from the front part 28, opposite, mechanical stress, which shifts the second raised portion 26 to the output side of light. Mechanical stress applied from the front side 28, limits the second raised portion 26 from moving in the opposite direction to the output side of light, and the second raised portion 26 becomes more invulnerable to accompanied by a bending deformation. With this arrangement prevents the formation of gaps at the joints J between the side edges 25a of the first raised part 25 and the edge 26a of the second raised portion 26. Therefore, without increasing the number of LEDs 17, to prevent light leakage through the joints J, and uneven brightness is limited at low cost.

The base 24 is an elongated rectangle, and the second raised portion 26 rise from the short sides of the base 24 along with the fact that the first raised portion 25 having a front side 28, rise from the long sides of the base 24. In this arrangement, when the elongated rectangular base 24 is subjected to thermal expansion due to changes in thermal environment, the base 24 has a tendency to undergo thermal expansion in the direction of a long side to a greater value than voltage is the making of the short side. Thus, the provisions of the elevated base edges of the second raised portions 26, raised from the short sides are shifted in accordance with thermal expansion of the base 24 in the long side direction, and the second raised portion 26 is slightly deformed. However, according to this exemplary variant implementation, the first raised part 25, elevated from the long sides, provided with outer portions 28. Even when the base 24 is subjected to thermal expansion, the front part 28 serve to limit the second raised portions 26 on the short sides of the displacement in the opposite direction to the output side of the world. Therefore, prevents the formation of gaps at the joints J, and, thus, preferably prevents leakage of light through them.

The second raised portion 26 rise from the pair of short sides of the base 24 along with the fact that the first raised part 25 climb from the pair of long sides of the base 24. Both of the side edges 25a pair of first raised portions 25 provided with outer portions 28. According to this configuration, since the front part 28 is provided at both of the side edges 25a of the first raised portions 25, raised from the long sides adjacent to the short sides, both of the side edges 26a pair of second raised portions 26, raised from the short sides, exposed p is ulozeniu mechanical stress from facial parts 28. Thus, the second raised portion 26 is safer restricted from moving in the opposite direction to the output side of the world. With this arrangement prevents the formation of gaps at the four joints J provided between the side edges 26a and 25a, respectively, of the adjacent pair of second raised portions 26 and the pair of first raised portions 25 and, thus, uneven brightness is effectively limited.

In addition, the angles at which the pair of second raised portion 26 rise from the base 24, is essentially equal, and the angles at which the pair of the first raised part 25 climb from the base 24, is essentially equal. With this arrangement, the light will be reflected pair of second raised portions 26, each essentially at equal angle. In this way, the light will be reflected pair of first raised portions 25, each essentially at equal angle. Accordingly, the light reflection reflected from the first reflective sheet 22 may be less uneven and, therefore, the uneven brightness is further restricted.

Plate 15a of the lens is provided as the optical element 15 located on the side of the light output relative to the LED 17. Despite the fact that at least raised the distal edge of the first raised portions 25 provided with UDL what changes 27, stretching out, the chassis 14 is provided with a receiving plate 14d, adapted to be placed between itself and the plate 15a of the lens extension 27. According to the arrangement, for example, when the flange 15a of the lens is mounted on the receiving plate 14d, while lengthening 27 rise above the receiving plate 14d, the first raised portion 25 are subjected to mechanical stress, which shifts the first raised portion 25 to the output side of the light in accordance with the insertion of the extensions 27 between them. In this case, the first raised portion 25, with the front portions 28 that protrude toward the exit side of light, and the front part 28 is applied to the second raised portions 26 of the mechanical stress, which shifts the side edges 26a of the second raised portions 26 to the output side of light.

The second raised portion 26 also protrude to the side of the light output, together with the first raised portions 25 and the front portions 28. By forcing the second raised portions 26 to stuff Hisself out towards the exit side of light mechanical stress from facial parts 28, the second raised portion 26 is safer restricted from moving in the opposite direction to the output side of the world. Accordingly, the joints J are not easy to get clearances, and thus preferably prevents the I leak light.

Boundary areas BP1 between the base 24 and the first raised portions 25 are bent at the bend 29 along with the fact that the boundary areas BP2 between the first raised portions 25 and the extensions 27 are bent without bending. Layout, where the boundary areas BP2 between the first raised portions 25 and the extensions 27 are bent without bending, will relatively increase the mechanical stress applied to the first raised portions 25 when the extension 27 is inserted between the plate 15a of the lens and the receiving plate 14d, compared with the arrangement where the boundary areas BP2 bent at the bend. Thus, stress applied from the front portions 28 to the side edges 26a of the second raised portions 26 increases, and therefore, the second raised portion more reliably restricted from moving in the opposite direction to the output side of the world. Accordingly, the joints J are not easy to get clearances, and thus, it is preferable to prevent light leakage.

Of the boundaries between the base 24 and the first raised portions 25 and boundaries between the first raised portions 25 and the extensions 27, the boundaries between the base 24 and the first raised portions 25 provided with perforations 30, which serve as recesses for facilitating the formation of a bend 29. According to this arrangement, when the second when adnate part 25 climb from the base 24, perforation 30 contribute to the formation of bends 29 and on the borders. Thus, the first raised portion 25 are easily formed in the desired configuration. On the other hand, the boundaries between the first raised portions 25 and extensions 27 is not provided with perforations, and thus bends almost not made. Therefore, stress can be more reliably applied to the first raised portions 25 when the extension 27 is inserted between the plate 15a of the lens and the receiving plate 14d.

Elevated distal edge of the second raised portions 26 provided with extensions 27, stretching out. The boundaries between the substrate 24 and the second raised portions 26 and the boundaries between the second raised portions 26 and the extensions 27 provided with perforations 32, which serve as cut-outs to facilitate the formation of folds 31. According to this arrangement, when the second raised portion 26 rise from the base 24, and also when the extension 27 is installed at the receiving plate 14d, perforation 32 contribute to the formation of the bend 31 at the borders. With this arrangement, the configuration of the second raised portions 26 is stabilized. Thus, the front portion 28 of the first raised portions 25 easily and securely placed to turn to the side edges 26a of the second raised portions 26, thereby more reliably applying mechanical stress ulicevic parts 28 to the second raised portions 26.

The notches include many perforations 30 and 32, linearly placed next to the intervals. With this arrangement, the notches (perforations 30 and 32) are formed at low cost during production of the first reflective sheet 22.

The front part 28 is provided at the side edges 25a of the first raised portions 25, to cover the whole of their length. According to this arrangement, the front portion 28 provided at the side edges 25a of the first raised portions 25, to cover the whole of their length, can apply mechanical stress to the second raised portions 26 and, thus, it is safer to limit the second raised portion 26 from moving in the opposite direction to the output side of the world. Therefore, more continuously prevents the formation of gaps at the joints J.

Elevated parts 25 and 26 are inclined relative to the base 24. Accordingly, the raised portion 25 and 26 serve to reflect light toward the output side of light at a favorable angle.

Elevated parts 25 and 26 are essentially linear. Thus, the raised portion 25 and 26 serve to reflect light toward the output side of light at a more favorable angle.

The chassis 14 includes a side plate 14c, which rises from the plate 14a of the base and defines with raised portions 25 and 26 of the space S. As space, Breakfast is STV S is maintained between the second raised portions 26 and the side plate 14c, the second raised portion 26 bit can be deformed to retreat into the space S. However, the front portion 28 provided at the side edges 25a of the first raised portions 25, preferably restrict the above displacement of the second raised portions 26 and thus prevents the light leakage through the joints J.

The light source can be LED 17. Thus, the achievable high brightness, energy saving, and the like.

Many LED installed on boards 18 LED, which extend parallel to the plate 14a of the base and the base 24. When installing multiple LEDs 17 on the boards 18 LED, in order to gather a greater number of LEDs, for example, in the vicinity of the joints J, as was done in the known technology, the LED 17 must be configured on the boards 18 LED disproportionate way. Thus, it will require the production of special boards LED, which leads to increased cost. However, the front portion 28 is provided at the side edges 25a of the first raised portions 25 of the first reflective sheet 22, as described above, which serve to dispense with the known method. Thus, for example, can be used boards 18 LED General application, on which the LEDs 17 are arranged at regular intervals. Accordingly, additional achievable reduction sebestoimost is I.

Diffusing lens 19 which are adapted to disperse light from the LED 17 and releasing light, located on the exit side of the light relative to the LED 17. With this arrangement, light emitted from the LED 17, scatters diffuser lenses 19 and is produced through dispersing lenses 19. Accordingly, since the output light shows less inequality, the number of LEDs 17 is reducing and, thus, the achievable reduction in cost.

<the Second is an implementation option>

The second exemplary variant of the implementation according to the aspect of the present invention will be described with reference to Fig. from 21 to 25. In this second exemplary embodiment, the light source in the above first exemplary embodiment is replaced by a lamp 40; plate 115a of the lens has a different configuration. The configuration, operation, and results similar to those in the above first embodiment implementation, re-described will not.

As is shown in Fig. 21 and 22, block 112 of the backlight according to this exemplary variant implementation uses the lamp 40 with; as its light source. Lamp 40 with; which in its entirety is tubular (linear), includes a hollow glass tube and a pair of electrodes provided on both tor the Oh of the glass tube. The glass tube is sealed with mercury and inert gas, and on the inner wall of the applied fluorescent material. Lamp 40 with; which has its surface emission on the outer periphery of the glass tube, is adapted to emit light radially from its axial center. Both ends of the lamp 40 with; inserted in a socket (not illustrated). By nests, electrodes attached to the power supply Board that is attached to the outer surface (rear surface) of the plate 114a of the base chassis 114, and exposed to the power supply with it.

Lamp 40 with; configured as above, in the singular placed in the chassis 114 with its long side direction (axial direction), which coincides with the long side direction of the chassis 114. Lamp 40 with; is located essentially in the middle of the chassis 114 in the direction of the short side of the chassis 114. More, if the area of the chassis 114, opposite the plate 115a of the lens, should be divided in the direction of the short side (Y axis direction) on the first boundary section 114A, the second edge section 114B located on the edge of the chassis 114, opposite the first edge section, 114A, and the Central section 114C, inserted between the first and second edge sections 114A and 114B, the lamp 40 with; is located on C is stralem section 114C, thus, providing integrated with the light source area LA. On the other hand, the first boundary section 114A and the second edge section 114B of the chassis 114, none of which is a lamp 40 with; provide built without light source area LN. In other words, the lamp 40; compiled locally on the Central section 114C (i.e., the middle position of the plate 114a of the base chassis 114 in the direction of the short side)to provide integrated with the light source area LA. The area is linked to the light source area LA (longitudinal size in the Y axis direction) is smaller than the area of the assembled without the light source zones LN (longitudinal direction in the Y axis direction). In addition, the ratio of the area arranged with the light source area LA (longitudinal size in the Y axis direction) to the area of the entire screen (vertical size (size of short side) of the screen), as an example, set to have a value of approximately 4%. Square pair linked without the light source zones LN essentially equal. In this exemplary embodiment, the second reflection sheet 23 that is used in the above-described first exemplary embodiment, liberated, and only the first reflection sheet 22 used in the first exemplary embodiment, the use as a reflective sheet 121. The reflective sheet 121 is configured like the first reflective sheet 22 described in the first exemplary embodiment, and also has a front part 28 (see Fig. 21).

Then, will be described plate 115a of the lens. As is shown in Fig. 22, the fee 115a diffuser includes a base substrate, the fullness of which the light transmittance and the light reflecting ability of essentially uniform, with scattering particles mixed therein recordationis way. More precisely, the base substrate plate 115a of the lens is preferably configured so that, for example, to show the light transmittance of approximately 70% and the light reflecting ability of approximately 30%. Plate 115a of the lens has a rear surface opposite the lamp 40 with; (hereinafter indicated by reference as the first surface 115a1) and a front surface opposite the first surface 115a1 and opposite to the liquid crystal panel 11 (hereinafter indicated by reference as the second surface 115a2). The first surface 15a1 serves as a surface of incidence of light through which is incident light from the lamp 40 with; and the second surface 115a2 serves as the surface of the light output through which light (light illumination) is available on recommittal the systematic panel 11.

As is shown in Fig. 23 and 24, the light reflector 41 with bitmap white color is provided on the first surface 115a1 plate 115a of the lens (i.e., the surface of light incidence). The light reflector 41 is configured from the condition that the set of points 41a, all in flat projection, were placed zigzag (staggered or alternating manner). The bitmap of the light reflector 41 is formed by printing, for example, a paste containing a metal oxide on the surface of the plate 115a of the lens. The seal is preferably screen printing, inkjet printing, or the like. The light reflector 41 is configured to independently show, the light reflecting ability, for example, approximately 75%. Compared with plate 115a of the lens, whose own reflectivity in the plane has a value of approximately 30%, the light reflector has a large light reflecting ability. According to this exemplary variant implementation, the light reflecting ability of each material is a medium light reflecting ability, demonstrated within diameter section, as measured by the CM-3700d LAV (diameter measuring 25.4 mm) produced by the Corporation Konica Minolta Optics. The light reflecting ability of the light of otragatel the 41 is measured, so: the light reflector is formed to cover the entire surface of the glass substrate; and a surface on which is formed a light reflector 41, is measured by the above measuring method.

Plate 115a of the lens, which continues in the long side direction (X-axis direction) and the direction of the short side (Y axis direction), modifies the light reflecting ability of the first surface 115a1 (i.e., the surface of the plate 115a of the lens opposite the lamp 40 with;) in the direction along the short sides, as shown in Fig. 25, by changing the bitmap of the first reflector 41 (see Fig. 23). In other words, as shown in Fig. 23, plate 115a diffuser configured from the condition that, in the fullness of the first surface 115a1, section, superimposed over the lamp 40 with; (hereinafter indicated by reference as section DA superimposed on the light source), which shows great light reflecting capacity than sections superimposed over the lamp 40 with; (hereinafter indicated by reference as section DN without overlapping the light source). The light reflecting ability, demonstrated the first surface 115a1 plate 115a of the lens, essentially constant in the direction of the long side with a few changes (see Fig. 23).

Will be described in detail the distribution of light reflecting ability in the plate 115a of the lens. As is shown in Fig. 23 to 25, the light reflecting ability of the plate 115a of the lens is gradually reduced, while far from the lamp 40 with; in the direction of the short side (Y axis direction), and sequentially increases, while next to the lamp 40 with; in the direction of the short side (Y axis direction). The distribution of the light reflecting ability is adapted to be normally distributed (distribution describes a bell-shaped curve line). More precisely, the light reflecting ability of the plate 115a of the lens is maximized in the middle position of the plate 115a of the lens in the direction of the short side (position coincident with the center of the lamp 40 with;) and minimized at both edges of the plate 115a of the lens in the direction of the short side. The maximum light reflecting ability, as an example, set at about 65%, along with the fact that a minimum of light reflecting ability, as an example, set at approximately 30% (i.e., equal light reflecting ability of the plate 115a of the lens). Accordingly, on both sides of the plate 115a of the lens in the direction of the short side, the light reflector 41 is placed only in a small amount, or a light reflector 41 is almost not posted./p>

In order to obtain the above-described distribution of the light reflecting ability, the light reflector 41 is configured as described below. Point 41a included in the light reflector 41, point 41a located in the middle position on the plate 115a of the lens in the direction of the short side (i.e., point 41a located to correspond to the position of the center of the lamp 40 with;) have a maximum area. Square points 41a gradually decrease as the point 41a are located further from the middle position of the plate 115a of the lens in the direction of the short sides, and the points 41a located at positions closest to the edges of the plates 115a of the lens in the direction of the short side and have a minimum area. In other words, the greater becomes the distance from the center of the lamp 40 with; the less be square pixels 41a. Configured above the plate 115a of the lens, in its entirety, are used for holding the brightness distribution of the light illumination within certain limits, which results in a moderate brightness distribution of the backlight unit 112 of the backlight as a whole. Alternatively, the light reflecting ability can be adjusted by changing the distances between the points 41a of the light reflector 41 along with the adjustment of the squares of the points 41a.

As described above, through clusters of lamps 40 with; in the Central part 114C in the chassis 114 and the supply plate 115a diffuser light reflector 41, as an example, achievable following advantages. When the lamp 17 with; is enabled, as shown in Fig. 23, the luminous efficiency of the incident light is properly regulated for each zone plate 115 of the lens, because the first surface 115a1 plate 115 of the lens through which incident light is emitted from it, provided with a light reflector 41, which shows the light reflecting different ability depending on its area in the plane. In more detail, section DA superimposed on the light source of the first surface 115a1, superimposed over 40 with; exposed to direct light from the lamp 40 with; in relatively larger quantities than section DN without overlapping the light source of the first surface 115a1. Accordingly, through a relative increase of light reflecting ability (square points 41a) of the light reflector 41 in section DA superimposed on the light source (see Fig. 23 and 25), the light incident on the first surface 115a1, is eliminated (limited), and a large amount of light is reflected to return to the chassis 114. On the other hand, section DN without overlapping the light source of the first surface the displacement 115a1, not superimposed over the lamp 40 with; are exposed to direct light from the lamp 40 with; in a relatively smaller amount than the section DA superimposed on the light source of the first surface 115a1. Therefore, by relatively decreasing the light reflecting ability (space points 41a) of the light reflector 41 in sections DN without overlapping the light source (see Fig. 23 and 25), the light is subjected to the assistance to be incident on the first surface 115a1. At this time, sections of DN without overlapping the light source is compensated by the light through the section DN without overlapping the light source, using the reflective sheet, the light reflected in the chassis 114 by a light reflector 41 section DA superimposed on the light source, and thus, a sufficient amount of light is reliably incident on the partition DN without overlapping the light source. Accordingly, the light emitted by the lamp 40 cold cathode, is subjected to the above-described optical effects along with passing through the plate 115a of the lens and is converted within the plane of the plate 115a of the lens in a substantially uniform plane light without unevenness. Then, the light is subjected to additional optical effects due to the optical sheets 15b and illuminates the liquid crystal panel 11.

The agreement is but this approximate version of the implementation, described as above, the block 112 of the backlight includes a plate 115a of the lens (that is, the optical element 115)located on the exit side of the light relative to the lamp 40 with; (i.e., light source). In block 112 of the backlight part of the chassis 114 opposite the plate 115a of the lens divided by linking to the source of light in the LA area, linked with the lamp 40 with; and linked without any light source area LN, not linked with the lamp 40 with;. On the other hand, at least the first surface 115a1 (i.e., the surface opposite the lamp 40 with;) plate 115a of the lens, superimposed over the assembled light source area LA (section DA superimposed on the light source), has a high light reflecting ability, than at least the first surface 115a1 (i.e., the surface opposite the lamp 40 with;) plate 115a of the lens, superimposed over the assembled without the light source zones LN (sections DN without overlapping the light source). With this arrangement, the light emitted by the lamp 40 with; in the beginning is incident on the area of the plates 115a of the lens having a relatively large light reflecting ability (section DA superimposed on the light source), and most of the light is reflected (in other words, is not passed through the layer is at 115a of the lens). Thus, the brightness of light illumination is limited regardless of the amount of light emitted by the lamp 40 with;. On the other hand, the light reflected by the section DA superimposed on the light source, adapted to re-reflected by reflective sheet 121 in the chassis 114 to be sent in assembled without the light source area LN. From plates 115a of the lens, plot, superimposed over the assembled without the light source zones LN (sections DN without overlapping the light source), shows a relatively small light reflecting ability, and a large part of light passed through it. Thus, light of the backlight is adjusted to achieve a predetermined brightness.

In addition, at least part of the chassis 114 opposite the plate 115a of the lens divided by the first boundary section 114A, the second edge section 114B located on the edge of the chassis 114, opposite the first edge section 114A, and the Central section 114C, placed between the first edge section 114A and the second edge section 114B, and the Central section 114C serves as arranged with the light source area LA along with the fact that the first and second edge sections 114A and 114B serve as compiled without light source areas LN. According to this arrangement, a sufficient brightness reliably achieved in the center of the block 112 of the backlight and that is they way the LCD device 110 display, which includes a block 112 of the backlight, as reliably achieves brightness in the centre of the display. Therefore, it can be achievable good visibility.

The light source is provided by the lamp 40 with;. Accordingly, there is the improvement in brightness, and the like.

<a Third option exercise>

The third approximate variant of the implementation according to the aspect of the present invention will be described with reference to Fig. 26. In this third exemplary embodiment, the light source in the above second exemplary embodiment, replaced lamp 50 cold cathode. The configuration, operation, and results similar to those in the above first embodiment implementation, re-described will not.

As is shown in Fig. 26, the lamp 50 cold cathode, which serves as a light source according to this exemplary variant implementation, shaped like an elongated tube (linear profile). Lamp 50 cold cathode includes an elongated hollow glass tube with both sealed its ends, and a pair of electrodes, encapsulated in both ends of the glass tube. The glass tube is sealed with mercury and inert gas, and on the inner wall of the applied fluorescent material. Both ends l is of 50 MPa cold cathode is supplied with the relay connectors (not illustrated), and contact pin protruding from the electrodes to the outside of a glass tube attached to the relay connectors. Through relay connectors, lamp 50 cold cathode is attached to the circuit Board of the inverter (not illustrated)attached to the outer surface of the plate 214a base chassis 214 and excited with the possibility of control. Lamp 50 cold cathode has a smaller outer diameter than the lamp 40 with; in the above second exemplary variant of implementation (who, as an example, has an outer diameter of approximately 15.5 mm), and the outer diameter of the lamp 50 cold cathode, as an example, has approximately 4 mm.

Configured above the lamp 50 cold cathode arranged in the chassis 214 disproportionate way, so that six lamps 50 cold cathode placed parallel to each other with predetermined intervals (steps alignment) with its longitudinal direction (axial direction), which coincides with the long side direction of the chassis 124. More precisely, if the plate 214a base chassis 214 (section opposite the plate 30 of the lens) must be divided equally in the direction of the short side on the first boundary section 214A, a second edge section 214B, located on the edge of the plate 214a of the base, opposite the first edge section 214A, and purpose of the Central section 214C, placed between the first and second edge sections 214A and 214B, the lamp 50 cold cathode is located at the Central section 214C plate 214a of the base, thereby providing integrated with the light source area LA. Arranged with the light source area LA according to this exemplary variant of implementation is greater than composed with the light source area LA according to the second exemplary variant implementation. On the other hand, the first boundary section 214A and the second edge section 214B plate 214a reasons, none of which is light 50 cold cathode, provide built without light source area LN. The reflective sheet 221 that is configured like the reflective sheet 121 in the above second exemplary variant implementation, includes a front portion 28.

According to this exemplary variant implementation, as described above, the light source is provided by the lamp 50 cold cathode. With this arrangement, achievable over a long service life, and facilitates the setting of the light.

<Other embodiments of>

The present invention is not limited to the above exemplary embodiments of the implementation are explained in the above description. For example, the following exemplary embodiments of the implementation can be included in the technical is the second volume of the present invention.

(1) According to the above exemplary variant(s) of implementation, the front part mounted on the side edges of the first raised parts, put to the side edges of the second elevated parts of the mechanical stress, which shifts the raised portion to the front side (i.e. the side of the light output). However, when there is a concern that the first raised part can be deformed by thermal expansion, the front portion 26a' may be installed on the side edge 26a' of the second raised portion 26'of the conditions to the front part 28' could be applied to the side edge 25a' of the first raised portion 25' of the mechanical stress, which shifts the first raised portion 25' to the output side of light, as shown in Fig. 27.

(2) Despite the fact that the first reflective sheet (reflective sheet is provided with perforations in the provisions of the bend, in order to promote the formation of bends in accordance with the above exemplary variant(s) of implementation, the notches that do not penetrate the first reflective sheet may be provided for in the provisions of the curve instead of perforations. More specifically, as shown in Fig. 28 and 29, the boundaries between the first raised portions 25 and the base 24, the boundaries between the second raised portions 26 and the base 24, and the boundaries between the second raised portions 26 and UD is inanami 27, which comply with the provisions of the bend, respectively, can be provided with grooves 33 and 34, which does not pass through the first reflective sheet 22' in the direction of thickness of the sheet. Grooves 33 and 34 to boundaries between the first raised portions 25 and the base 24 and the border between the second raised portions 26 and substrate 24 (i.e., boundaries that must be bent with a groove) is formed on the front surface of the first reflective sheet 22. On the other hand, the grooves 34 for boundaries between the second raised portions 26 and the extensions 27 (i.e., boundaries that must be bent crest) are formed on the rear surface of the first reflective sheet 22.

(3) Despite the fact that the end surface of the front parts being located in a plane with the rear surface of the second raised parts, when the curved portion of the first reflective sheet (reflective sheet) are bent along the perforations (see Fig. 17) according to the above exemplary variants of implementation, the front part can go outside (in the direction in which the first raised portion rising from the base) relative to the rear surface of the second raised portions, when the first reflective sheet is bent. With this arrangement, the front part of the safer adjacent to the side edges of the second raised parts.

(4) Bore is otra, the first raised portion and the second raised portion are deformed to form the arched profile in accordance with the above exemplary implementation options, the first raised portion and the second raised portion can form a profile other than the arched profile, through deformation in the invention.

(5) Despite the fact that the boundaries between the first raised parts and movements do not have any folds or grooves (perforations or grooves) in accordance with the above exemplary variants of implementation, the boundaries can be provided with folds or grooves in the invention. When the folds or grooves are provided at the borders, elongation, continued from the first raised parts, preferably curved to such an extent that the elongation and the receiving plates have a gap between them.

(6) Although the front end is provided to cover the full length of the side edges of the first raised parts (or second raised parts), according to an exemplary implementation options, the front part may be provided to partially cover the side edges of the first raised parts (or second raised parts in the invention.

(7) Despite the fact that the front part is provided at both side edges of the first raised parts (or second raised parts) and, thus, coupled with the according to the above exemplary implementation options, the front part can be installed on any one of the lateral edges of the first raised parts (or second raised parts). In addition, both of the paired first raised parts (or both of the paired second raised parts) can be equipped with facial parts or, alternatively, any one of the first pair of raised parts (or any one of the second pair of raised parts) can be provided with only the front part(s) without installing the front part(s) to the other one of the pair of first raised portions (or the other one of the pair of second raised parts).

(8) Despite the fact that the first reflective sheet (reflective sheet) has a transverse rectangular base according to an exemplary implementation options, the basis, for example, may be square in the invention.

(9) Despite the fact that the LED (light source) is provided recordationis to essentially everywhere to cover the base plate of the chassis (the bottom of the first reflective sheet) according to the first exemplary variant implementation, LED, for example, can be collected around the middle area of the base plate of the chassis, as in the above described second and third exemplary embodiments of implementation. When the LED is assembled around the middle area of the base plate, through the use of plate receiveth the La, having a light reflector, as in the second and third exemplary embodiments of implementation, the light output from the backlight unit, can exhibit uniform brightness without unevenness.

(10) Although the LED, that is, one type of a point source of light is used as light source according to the first exemplary variant implementation, the light source may be another point light source in the invention. Other than the point light source, the light source, in the alternative, may be a surface light source, such as an organic EL.

(11) Despite the fact that the solitary lamp; used as a light source according to the above-described second exemplary variant implementation, the light source may be two or more lamps with; in the invention. (11) similarly, despite the fact that the six lamps cold cathode is used as the light source according to the third exemplary variant implementation, the light source may be five or less lamps, cold cathode or seven or more lamps cold cathode in the invention.

(12) Despite the fact that the lamp(s); or lamp(s) with cold cathode (i.e., one type of fluorescent tube (linear light source)is used as the light source with the under the second and third exemplary implementation options, the light source may be another fluorescent tube in the invention. Other than fluorescently tube, the light source may be an electric discharge tube, such as a mercury lamp, in the invention.

(13) Despite the fact that the only type of light source is applied according to an exemplary implementation options, many types of light sources can be used in the invention. More precisely, a lamp; and the cold cathode lamp can be used together, LED and lamp with; or cold cathode can be used together, or the LED lamp; and a cold cathode can be used.

(14) Despite the fact that the Central section of the chassis provides integrated with the light source area and its first and second peripheries provide built without a light source area, according to the second and third exemplary variants of implementation, at least any one of the first and second edge sections of the chassis can provide integrated with the light source area, with other areas of the chassis, providing built without light source area in the invention. When employing the above configuration, the first boundary section and the Central section of both may provide, arranged the light source area, or, in the alternative, the second edge section and the Central section of both can provide integrated with the light source area. When the position of the light source is changed, as in the above, the bitmap of the light reflector plate of the lens can also be changed accordingly.

(15) Although the liquid crystal panel and the chassis are used in a vertically standing position, with their directions of the short sides coinciding with the vertical direction, according to an exemplary implementation options, the liquid crystal panel and the chassis can be used in a vertically standing position with his direction of the long side that coincides with a vertical direction in the invention.

(16) Although the TFT used as a switching component for liquid crystal display device according to the above exemplary variants of implementation, the switching component for liquid crystal display device may be a switching component, other than the TFT, such as thin-film diode (TFD). In addition, the liquid crystal display device may be a color display device or, alternatively, a black-and-white display device.

(17) Despite the fact that idcok istoricheskoe the display device, using the liquid crystal panel as the display panel illustrated in the above embodiments, the implementation, the present invention is applicable to display devices using the display panel of another type.

(18) Despite the fact that the television receiver includes a tuner, illustrated in the above exemplary embodiments, the implementation, the present invention is applicable to display devices, not including tuners.

LEGEND

10, 110: Liquid crystal display device (display device)

11: Liquid crystal panel (display panel)

12, 112: backlight Unit (lighting device)

14, 114: Chassis

14a, 114, 214: Plate base

14c: Side plate

14d: Reception plate

15, 115: Optical

15a, 115a: Plate of the lens (optical element)

17: LED (light source)

18: Charge LED

19: diffuser lens

21: Reflection sheet (reflection element)

22: the First reflection sheet (reflection element)

24: Base

25: the First raised portion (one raised part)

25a: the Lateral edge

26: the Second raised portion (the other raised portion)

26a: Side edge

27: Elongation

28: the Front part of the

29, 31: Fold

30, 32: Perforation (new the ka)

33, 34: Groove (notch)

40: Lamp; (light source)

41: the Light reflector

50: cold cathode Lamp (light source)

114A, 214A: the First boundary area

114B, 214B: Second regional area

114C, 214C: Central plot

115a1: First surface (the surface opposite to the light source)

121, 221: Reflective sheet

BP1: Border

BP2: Border

DA: Section superimposed on the light source section, superimposed over the assembled light source area)

DN: Section without overlapping the light source section, superimposed over the assembled without the light source zones)

J: Junction

LA: Arranged with the light source area

LN: Compiled without light source area

S: Space

TV: Television receiver

1. Lighting device, comprising:
the light source;
the chassis includes a base plate provided on the side opposite to the light output relative to the light source and the chassis accommodates the light source; and
the reflective element configured to reflect light, and includes a rectangular portion of the base and at least two raised parts, with part of the base link along the base plate, and each of the at least two raised portions raised from men is our least two adjacent sides of the base, respectively, to the output side of light, and each raised portion has a side edge, and two raised parts form a joint between adjacent two side edges of the raised parts, thus:
at least two raised parts include one raised portion and another raised part, and one raised portion includes a front portion at its lateral edge, so as to contact the side edge of the other raised portion relative to the direction directing from the base to the one raised portion and one raised portion and the front portion protrude toward the side of the output light,
optical element, provided on the side close to the output side of the light relative to the light source, while
at least one raised portion includes an elongated portion at its distal edge, and an elongated portion extends outside; and
the chassis includes a receiving plate configured to place an elongated part between itself and the optical element,
the base and one raised portion form the boundary of which is bent with a bend, and one raised portion and an elongated portion forming a boundary which is curved without bend.

2. The lighting device according to claim 1, in which:
the base is elongated quadrilateral; and
another raise is ATA part rises from the short side of the base, and one raised portion having a front side, rises from the long side of the base.

3. The lighting device according to claim 2, in which:
another raised portion raised from each of the pair of short sides of the base, and one raised portion raised from each of the pair of long sides of the base; and
the front part is provided for each of the two side edges of each of the paired raised some parts.

4. The lighting device according to claim 3, in which the other pair of raised portion rising from the base at an angle of rise, essentially equal to the angle of ascent, which paired one raised portion rising from the base.

5. The lighting device according to claim 1, in which the other raised portion protrudes toward the side of the light output together with one raised part and the front part.

6. The lighting device according to claim 1, in which the boundaries between the base and one raised part and the boundaries between one raised part and the extended part, the boundary between the base and one raised part provided with a recess, which contributes to the formation of the bend.

7. The lighting device according to claim 6, in which:
another raised portion includes an elongated portion at its distal edge, and an elongated portion extends outside; and
the base and another elevated the art form the boundary, and another raised portion and an elongated portion forming a border, and each of the borders provided with a recess, which contributes to the formation of the bend.

8. The lighting device according to one of p and 7, in which the recess includes perforations arranged linearly at intervals.

9. The lighting device according to any one of claims 1 to 7, in which the front part is provided to cover the full length of the side edges of one of the raised part.

10. The lighting device according to any one of claims 1 to 7, in which the raised portion is inclined relative to the base.

11. The lighting device of claim 10, in which the raised part formed to be essentially linear.

12. The lighting device according to any one of claims 1 to 7 and 11, in which the chassis is also includes a side plate, which rises from the base plate, and side plate defines a space with raised portions and facing the raised parts.

13. The lighting device according to any one of claims 1 to 7 and 11, in which the light source is an LED (led).

14. The lighting device according to item 13, in which:
The LED includes multiple LEDs; and
LED installed on Board LED, which continues parallel to the base plate and the base.

15. The lighting device according to item 13, the additive is about containing the scattering lens provided on the exit side of the light relative to the LED and configured for scattering light from the LED and output light from it.

16. The lighting device according to any one of claims 1 to 7, 11, 14 and 15, additionally containing an optical element, provided on the exit side of the light relative to the light source, in this case:
the chassis includes a portion facing the optical element, and the part is divided into assembled with the light source area, in which are arranged a light source, and a blank area in which the light source is not arranged; and
the optical element includes a portion that overlaps arranged with the light source area, and the portion that overlaps the empty area, and the light reflecting ability of higher on at least the surface of the part, arranged overlapping with the light source area facing the light source than at least the surface portion that overlaps the empty area.

17. The lighting device according to clause 16, in which:
the chassis includes a portion facing the optical element, and the portion is divided into at least a first edge area, a second boundary of land located on the edge opposite the first edge section, and the middle portion provided between the first edge portion and second edge area; and
average teaching the current matches are arranged with the light source area, and the first boundary section and the second edge of the plot correspond to the empty zone.

18. The lighting device according to clause 16, in which the light source is a cold cathode lamp.

19. The lighting device according to clause 16, in which the light source is a lamp;.

20. A display device, comprising:
the lighting device according to any one of claims 1 to 19; and
panel display, adapted to display using light from the lighting device.

21. The display device according to claim 20, in which the display panel is a liquid crystal panel configured from the condition that the liquid crystal was enclosed between a pair of substrates.

22. Television receiver containing the display device according to one of p and 21.



 

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