Lighting device, display device and tv receiver

FIELD: electricity.

SUBSTANCE: lighting device includes a light source device U, units (31 - 35) of light guides, chassis (60) and a positioning part S. The chassis (60) comprises the light source device U and units (31 - 35) of light guides. The light source device U includes multiple sets of light sources P, arranged along the central line Lc. Each set of light sources P is a pair of light diodes (45), arranged so that it is equidistant from the central line Lc and facing each other. Each unit (31 - 35) of light guides is arranged between the appropriate set of light sources P. Light sources have two final surfaces E in the longitudinal direction, which face the light diodes (45). Positioning parts S are placed in the middle part of the appropriate units (31 - 35) of light guides in longitudinal direction on the central line Lc.

EFFECT: elimination of uneven brightness.

21 cl, 15 dwg

 

The technical field to which the invention relates

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

The level of technology

In display devices such as liquid crystal panel that displays a moving image, there is a phenomenon known as the stretching continued. Patent document 1 below discloses a method designed to minimize stretching of the continuation of the images using a scanning backlight, in which sections of the light sources include synchronously with the image recording on the side of the liquid crystal panel. Because the light sources forming respective channels require a light guide plate for scanning backlight, the light guide plate is divided into many blocks.

Patent document 1: Japanese unexamined patent publication No. 2001-92370.

The problem solved by the present invention

Thermal shrinkage may be caused in the respective blocks constituting the light guide plate, the heat generated by the light sources, and it requires clearances provided between the light sources and blocks. However, gaps can cause changes in the positions of the respective blocks BK. As shown in Fig, some of the blocks BK1, WC and WC may be the closer to the left side in the drawing, and other blocks BK2 and VK can be located closer to the right side in the drawing. In the parts in which the blocks BK (BK1, WC and VC) are located closer to the left side, the left side, which is closer to the light sources, N, is brighter, and the right side away from the light sources N will be darker. In contrast to the above, in the parts in which the blocks BK (BK2 and VC) are located closer to the right side, the right side, which is closer to the light sources, N, is brighter, and the left side, away from sources of light H will be darker. Thus, there will be changes in brightness between the respective blocks BK1 to VC, resulting in uneven brightness. Such uneven brightness unevenness caused by the lack of brightness on the left and right side) may also occur in configurations with undivided plate of the light guide.

The invention

The present invention was made in view of the above circumstances, and its objective is to reduce uneven brightness in lighting devices.

Means for solving the problem

The lighting device (the first lighting device) of the present technology includes a light source device, many elements of the fiber, hull element and part positioning. The device of the light source in the cancel many sets of light sources, along the Central line. Each of the sets of light sources includes a set of point light sources arranged so as to be equidistant from the Central line and facing each other. Many elements of a light guide provided between the set of light sources, and each of the fiber elements provided corresponding to each set of light sources. Each of the elements of the fiber has both end surfaces in the longitudinal direction, and the end surface facing to the respective point light sources. Corpus element places the device of the light source and the set of elements of the light guide. Part positioning configured to locate each of the elements of the light guide so that the middle part of the element of the light guide in the longitudinal direction corresponds to the Central line.

The lighting device described above is configured with the ability to have a middle part in the longitudinal direction of the fiber elements located on the Central line corresponding to the middle points of the pairs of light sources. Therefore, the distance from the point light sources to the end surfaces of the fiber are the same on the left and the right side. Thermal shrinkage is caused in the fiber elements of sredstv the e heat generated from the light sources, and thermal shrinkage is caused by the same on the left and the right side relative to the middle parts, which are fixed in position. Thus, the distance from the light sources to the end surfaces remains the same on the left and right side and is kept constant. Therefore, the corresponding elements of the fiber output light evenly on the left and the right side relative to the center line, when the light sources are included. Therefore, there will be no uneven brightness.

The following configurations are preferred as the embodiments of the lighting device (the first lighting device) of the present invention.

Part of positioning may include a protrusion provided in one of the body element and elements of the light conductor and the receiving part provided in the other one of the body element and elements of optical fibers to be aligned with the tab. Thus, the elements of the fiber can be located only by inserting the tabs into the receiving part. Therefore, the positioning can be performed easily without a lot of time and effort. As the number of components is not increased, there is also a benefit in cost.

Part positioning can be provided in the front part of the elements of the fiber so so as not to overlap the light sources in the plane along the line connecting the corresponding set of light sources. In this configuration, the part positioning is located away from the light axis. On the reflection of light significantly affected by the provision of part positioning in comparison with the case where it is not provided. If part of the positioning provided on the light axis, a significant effect can be caused by lighting efficiency, but with this configuration there is no such concern.

The lighting device (the second lighting device) of the present technology includes a light source device, one of the light guide plate, hull element and part positioning. The light source device includes sets of light sources arranged along the Central line. Each of the sets of light sources includes a set of light sources, arranged in such a way as to be equidistant from the Central line and facing each other. One of the light guide plate is located between the set of light sources and has both end surfaces in the longitudinal direction, and the end surface facing the light sources. Corpus element places the device of the light source and the light guide plate. Part positioning configured with location p is required fiber so that middle part of the light guide plate in the horizontal direction corresponds to the Central line.

The lighting device described above is configured with the ability to have the middle part in the longitudinal direction of the light guide plate, located on the Central line corresponding to the middle point of the set of light sources. Therefore, the distances from the light sources to the end surfaces of the light guide plate are the same on the left and the right side. Thermal shrinkage is caused in the light guide plate due to heat generated from the light sources. Thermal shrinkage is caused by the same on the left and the right side relative to the middle part, which are fixed in position. Thus, the distance from the light sources to the end surfaces remains the same on the left and right side and is kept constant. Therefore, the light guide plate outputs light evenly on the left and the right side relative to the center line, when the light sources are included. Therefore, there will be no uneven brightness.

The following configurations are preferred as the embodiments of the lighting device (the second lighting device) of the present invention.

Part of positioning may include a protrusion provided in one of arpusnig element and the light guide plate, and the receiving part provided in the other one of the body element and the light guide plate, in order to be interfaced with the tab. Thus, the light guide plate can be located only by inserting the protrusion into the receiving part. Therefore, the positioning can be performed easily without a lot of time and effort. As the number of components is not increased, there is also a benefit cost.

Part positioning can be located in the middle part of the light guide plate and outside the display area of the liquid crystal display panel. In this configuration, the part positioning may be located outside the display area. Therefore, it is unlikely to affect the efficiency of the display.

The following configurations are preferred as the embodiments of both lighting devices (first and second lighting devices) of the present invention.

The device of the light source may be a matrix of point light sources, with a boundary running parallel to the Central line, and point sources of light, forming a set of light sources located in a row. Thus, Assembly can be performed efficiently, as many point light sources can be assembled together with the housing element.

atrica point light sources can be attached to the vessel element. Thus, as the matrix of point light sources and the elements of the fiber (or the light guide plate) attached to the same element (vessel elements), the matrix of point light sources and the elements of the fiber (or the light guide plate) can be very precisely positioned relative to each other.

The lighting device may further include a reflective element provided on the circuit Board and the reflective light of the point light sources. Thus, the light radiated from the point light sources, can be made incident on the elements of the fiber more efficiently. Reflective element may preferably be a reflective sheet, such as a reflective sheet of foam PET or multilayer reflective sheet, or may be formed from a reflective resist.

Point lights can be white LEDs. Then there can be the advantage of a longer lifetime of point light sources and lower the power consumption.

White light may include light-emitting crystal, emitting blue light, and a fluorescent layer formed around the light emitting chip and having a maximum light emission in the yellow range. Thus, the white led can be configured as a single crystal. The white led may in luceti in itself light-emitting crystal, emitting blue light, and a fluorescent layer formed around the light emitting chip and each having the maximum light emission in bands of green and red. Alternatively, white light may include light-emitting crystal, emitting blue light, a fluorescent layer formed around the light emitting chip and having a maximum light emission in the green range, and a light-emitting crystal, emitting red light.

White light may include light-emitting crystal, emitting blue light, a light-emitting crystal, emitting green light, and a light-emitting crystal, emitting red light. With this configuration can be achieved illumination light essentially uniform hue, as the color generally aligned.

White light may include light-emitting crystal, emitting ultraviolet light and a fluorescent layer formed around the light emitting chip, and in this case, the fluorescent layer may preferably have each a maximum of light emission in the range of blue, green and red. Thus, since the colors in General are aligned, can be achieved illumination light essentially uniform color tone.

The display device of the present technology includes the em in the lighting device, described above, and the liquid crystal display panel that displays an image using light from the lighting device. In addition, the TV receiver of the present invention includes the display device. Such a display device can be applied in the display of a television or a personal computer and, in particular, is suitable for use as displays with large screens.

A positive result of the invention

In accordance with the present invention, can be provided a lighting device that does not have an uneven brightness. In addition, there may be provided a display device and television receiver using this lighting device.

Brief description of drawings

Figure 1 is a disassembled perspective view illustrating a schematic configuration of a television receiver, in accordance with the first embodiment of the present invention;

figure 2 is a disassembled perspective view illustrating a schematic configuration of a display device provided in the television receiver.

figure 3 is a view in the plane of the lighting device, illustrating the positional relation between the matrix of LEDs and fiber blocks;

4 is a view in cross section illustrating the structure of LD (led);

5 is a view in cross section illustrating the structure of the LED (led);

6 is a view in cross section illustrating the structure of the LED (led);

Fig.7 is a perspective view of a matrix LED;

Fig - view in cross-section, cut along the center line Lc 3;

Fig.9 is a view in cross-section, cut horizontally, the display device;

figure 10 is a view in cross section illustrating the structure of the parts of the positioning, in accordance with the second embodiment of the present invention;

11 is a disassembled perspective view illustrating a schematic configuration of a display device in accordance with a third embodiment of the present invention;

Fig - view in the plane of the lighting device, illustrating the positional relationship between the LED matrices and blocks the light guide;

Fig - view in cross-section, cut along the center line Lc Fig;

Fig - view in the plane, illustrating a modified example of the light source device; and

Fig - view in the plane, illustrating the structure of a traditional lighting.

The best mode of carrying out the invention

The first option exercise

The first variant of implementation of the present invention will be described with reference to figure 1 in figure 9. Televisio the hydrated TV receiver, in accordance with this embodiment, includes a device 10 of the display, the front and rear sections CA and Cb, host, so as to “sandwich”, the device 10 of the display, the power source PW, a tuner T and a stand S, as shown in figure 1.

The device 10 display has a generally horizontally elongated rectangular shape and includes a liquid crystal panel 11, which is a display panel, and the device 21 of the lighting, which is an external light source. In the following description, the width direction (longitudinal direction) of the display devices 10 will be referred to as the X direction, the height direction (in the direction of the short side) of the device 10 display will be referred to as the Y direction, and the direction of the depth of the device 10 display will be referred to as the z direction. Central line Lc refers to a straight line passing through the center in the X direction of liquid crystal panel 11 display and passing along the direction Y (Fig 3).

The liquid crystal panel 11 has a horizontally elongated rectangular shape, as shown in figure 2. The liquid crystal panel 11 is made of a pair of glass substrates separated by a certain distance and connected together, and a liquid crystal sealed between the two glass the substrates. One glass substrate includes switching components (such as TFT)connected to source lines and lines of gate orthogonal to each other, pixel electrodes connected to these switching components, and the alignment film, etc. and the Other glass substrate includes a color filter with the respective color sections such as R (red), G (green) and b (blue)arranged in a predefined location, the counter electrodes and the alignment film, etc. Both substrates have the polarizing plate on its outer edges.

The device 21 lighting includes a plate 30 of the fiber, matrix LED 40R and 40L (one example of a matrix of point sources of light present invention), forming the device of the light source U, the optical sheet 80, the chassis 60 (one example of “the body element” of the present invention)that host them, and item 90 of the latch, as shown in figure 2.

Chassis 60 is made of metal and has a horizontally elongated rectangular shape, symmetrical with respect to the center line Lc. Chassis 60 is formed through the bottom plate 61 and the side plates 65, rising from respective outer edges of the bottom plate 61, in such a way as to have a shape like a shallow box that is open toward the front side to the I is a side of the display surface (see figure 3).

Of the side plates 65 of the chassis side plates 60 65R and 65L on both sides in the X direction to form surface mounting, and matrix 40R and 40L LED mounted in the respective inner walls of the side plates 65R and 65L, and their light-emitting surfaces facing the inside.

More specifically, each of the matrices 40R and 40L LED formed using Board 41, and the LED 45 (one example of “point light source” of the present invention) mounted on the circuit Board 41. Board 41 is made of metal, such as the same aluminum material as the material of the chassis 60, and is formed with a conductive pattern (not illustrated)made of a metal film such as copper foil on its surface with an insulating layer.

Card 41 is parallel to the center line Lc, shown in figure 3, containing a number (in this example, five) LED (LEDs) 45 arranged at regular intervals in a row on its surface.

Matrix 40R and 40L LED are located at positions equidistant from the center line Lc, as shown in figure 3. The corresponding LED 45 mounted in the matrices 40R LED, therefore, to be facing each other and 40L, and each LED emits light having a light axis. Therefore, each of the two LED 45 facing each other left and right, forming a pair of light sources R. namely, in this case five the art LED 45, facing each other, form five pairs of light sources P1 to P5.

Each LED 45 is a square, as visible as in the plane, and is formed with three sets of light-emitting crystals W, 46G and 46R, emitting light of blue, green and red, are located on one line, and is sealed with a transparent polymer 49, as shown in figure 4. This LED emits white light when three sets of light-emitting crystals W, 46G and 46R are enabled simultaneously by mixing the three colors.

In the alternative, the LED 45 may be configured differently than above, using light-emitting crystal W, emitting a blue color, a layer 48 of phosphorus, is formed around the light emitting crystal V, and covering it. The layer 48 of phosphorus, for example, formed using a transparent polymer or binder and fluorescent particles dispersed therein, and has a maximum light emission in the range of yellow to blue. The layer 48 of the phosphor emits yellow light when the fluorescent particles excited with the light emitted through the light-emitting crystal W. Thus, the LED 45 emits white light by mixing blue and yellow (see figure 5).

In the alternative, the LED 45 can be configured by using the light-emitting crystal V, izluchayushchie color, and a second layer 48 of phosphorus formed around him. The layer 48 of phosphorus is formed using a transparent polymer or binder containing fluorescent particles, and each has a maximum light emission in bands of green and red. With this configuration, the LED 45 emits white light by mixing the respective colors (blue, green and red) (see figure 5).

As another alternative, the LED 45 can be configured by using the light-emitting crystal R, emitting ultraviolet light, and a layer 48 of phosphorus, is formed around the light emitting crystal R, and covering it (see Fig.6). The layer 48 of phosphorus is formed using a transparent polymer or binder containing fluorescent particles, and each has a maximum light emission in the range of blue, green and red. With this configuration, the light emitted through the light-emitting crystal R, excites the fluorescent particles, and a layer 48 of the phosphor emits light of three colors, blue, green and red. Thus, the LED emits white light by mixing these three colors.

Reflective sheet 42 (one example of a reflective element of the present invention) is located on the circuit Board surface 41, as shown in Fig.7. Reflective sheet 42 passes through the whole length Horiz is stalnom the direction of the Board and formed so to continuously cover the area, except for the positions of mounting of the LED 45, on the Board surface. This reflective sheet 442 provides the function of reflecting a light radiated from the LED 45 toward the plate 30 of the waveguide, described below.

For reflective sheet 42 can be used reflective sheet foam PET or multilayer reflective sheet. The reflecting sheet foam PET is reflective sheet made of white foam PET (polyethylene terephthalate) as part of the foundations of the polymer. Multilayer reflective sheet or ESR (enhanced specular reflector is a reflective sheet having a high reflection in the visible light range using a multilayer structure using polymer polyester.

Then, the plate 30 of the fiber is located in the Central part of the bottom plate 61 of the chassis 60, which forms a flat surface, with the front side F, which is the exit surface of the light facing up. The plate 30 of the light guide directs the light that enters it, toward the front side F, which is the surface of the light output. The plate 30 of the light guide is divided into five blocks of the fiber (one example of “fiber elements” of the present invention) 31 to 35, corresponding to the five pairs of light sources R. the Respective blocks 31 to 35 have been made is received from a very transparent polymer such as acrylic polymer). The respective blocks 31 to 35 have a square columnar shape, elongated in the direction parallel to the light the light axis, and each has a reflective sheet 37 provided on the side of the Century

Five blocks 31 to 35 of the fiber have the same shape (and overall length). Their full length is set shorter than the direct distance Lp between the LED (see figure 3). Each of the blocks 31 to 35 of the light guide is positioned horizontally between each pair of light sources R, with its axis aligned with the light axis C. the Left and right end side (the surface of light incidence) E turned to the left and right LED 45, forming a pair of light sources R, respectively.

The respective blocks 31 to 35 of the light guide is configured in such a way that their Central part in the longitudinal direction are located on the center line Lc by using parts of the positioning S, described below. More specifically, five protrusions 71 to 75 are provided in a row along the center line Lc, which corresponds to the middle points of the pairs of light sources P on the bottom plate 61 of the chassis 60. These five tabs 71 to 75 are columnar and act towards the blocks 31 to 35 of the light guide. The protrusions 71 to 75 may be either formed as a whole on the bottom plate 61 of the chassis 60, or may be separate parts.

On the other hand, the blocks 31 to 35 of the fiber which have corresponding receiving portion 31A 35A on their reverse sides In the Central portions in the longitudinal direction to mate with the protrusions 71 to 75. The receiving portion 31A at 35A is configured as a circular recess corresponding to the shape of the protrusions 71 to 75. Thus, the tabs tightly inserted into them (see Fig).

Thus, using the protrusions 71 75 inserted in the receiving portion 31A 35 And the Central part in the longitudinal direction of the blocks 31 to 35 of the light guide is disposed on the Central line. Thus, the length of the mr and ml to the left and to the right relative to the center line Lc are the same, as shown in figure 3. Thus, the distance (gap) Dr from the end sides on the right side of the blocks 31 to 35 of the fiber to the LED 45 is equal to the distance (gap) D1 from the end side on the left side of the blocks 31 to 35 of the fiber to the LED 45.

Because five blocks 31 to 35 of the fiber have the same total length, the distance Dr and the distance Dl to the LED 45 is equal with respect to all blocks 31 to 35 of the light guide. The reason why the gaps are provided between the LED 45 and the end sides of the E blocks 31 to 35 of the light guide, is to provide a thermal shrinkage of the blocks 31 to 35 of the light guide. Distances Dr and Dl between the LED 45 and end sides E is set so that between them there is a predetermined distance, when the full length of the blocks 31 to 35 of the fiber is maximum.

Next will be described the positional dependence in the Y direction between the parts of the point is the simulation of S and LED 45. Part positioning S are located on the lower edge of the blocks 31 to 35 of the light guide, as shown in figure 3 and Fig to be away from parts facing the LED 45. In other words, part of the positioning S provided to be away from the lines connecting the left and right LED 45, 45, forming respective pairs of light sources R, forming a “sandwich” with the respective blocks 31 to 35 of the light guide.

It should be noted that although the blocks 31 to 35 of the light guide is illustrated with gaps between them in figure 3 to explain that the respective blocks 31 to 35 of the fiber separated from each other, the blocks 31 to 35 of the fiber by being in close contact with each other.

Again with reference to figure 2, the optical sheet 80 is a thin sheet and has a horizontally elongated rectangular shape similar to the liquid crystal panel 11. The optical sheet 80 may be appropriately selected from applicable types, including, for example, a light diffuser sheet, a lens sheet, a sheet of reflective polarization or the like. The optical sheet 80 is placed on the front side F of the plate 30 of the light guide in such a way as to cover the entire surface of the front side F of the plate 30 of the light guide.

Then the element 90 of the retainer is formed in a frame shape along the outer circumferential edges of the plates 30 of the fiber, as shown in figure 2. E is ement 90 retainer made of a synthetic polymer (based on the black color, much blocking the light) and has a cross section in the form of L. the Element 90 of the latch attached to the lid of the chassis 60, and the side walls 95 of the element 90 of the retainer are inserted through the outer side of the side plate 65 of the chassis 60, and the front wall 91 overlapping the outer circumferential side of the blocks 31 to 35 of the fiber-forming plate 30 of the light guide. Thus, the position of the blocks 31 to 35 of the fiber can be controlled in the depth direction (Z-direction).

The liquid crystal panel 11 is located on the front side 90 of the latch, so that its outer circumferential face cover on the front wall 91. Because the beveled edge 13 in the form of a frame attached to the front side of the liquid crystal panel 11, the liquid crystal panel in General hold on the device 21 lighting.

The device 21 lighting configured to control lighting of pairs of light sources R synchronously with the recording of images (the images are recorded in pixels) on the side of the liquid crystal panel 11, a technique known as scanning backlight. When a pair of light sources R, corresponding to the position of the image recording enabled (more specifically, when simultaneously on the left and right LED 45, forming a pair of light sources), light entering end side of the corresponding block 31 to 35 of the light guide and the Russ is provided, as it extends through the block 30 of the light guide. This light is reflected through the reflecting sheet 37 on the back In block 30 of the light guide toward the front side F, which is the surface of the light output.

Front side F of one of the blocks 31 to 35 of the light guide located in the position corresponding to the position of recording the image, thus intensively displays the light and illuminates the liquid crystal panel 11 (more specifically, the position of the record image) on the rear side. On the other hand, light is not included in other sections, and a pair of light sources R remains off. Thus, stretching the continuation of the image can be reduced. Therefore, it can be improved image quality.

Next will be described the predominant result of the invention. In this device 10 display units 31 to 35 of the light guide is positioned so that their Central part in the longitudinal direction are located on the center line Lc. Therefore, the distances Dr and Dl from the LED 45 to the end sides of E on the left and right side. Thermal shrinkage may be caused in blocks 31 to 35 of the fiber due to the heat generated by the LED 45. Thermal shrinkage is caused by the same on the left and right sides relative to their Central parts, which are fixed in position. Thus, is astonia Dr and Dl from the LED 45 to the end sides E support the same on the left and right side, and they are always constant. Therefore, the blocks 31 to 35 of the fiber output light evenly on the left and the right side relative to the center line Lc, when the LED 45 is turned on. Therefore, there will be no uneven brightness.

In this device 10 showing how the matrix 40R and 40L LED, and the blocks 31 to 35 of the light guide attached to the same element (chassis 60 in the quality of the body element). Thus, the matrix 40R and 40L LED units 31 to 35 of the light guide can be positioned very accurately relative to each other. In this configuration are unlikely to be errors in the distances Dr and Dl, which makes it even more incredible that happened uneven brightness.

In this device 10, the display part positioning S provided on the bottom face of the blocks 31 to 35 of the light guide, thus, to be away from parts facing the LED 45. In this configuration, the part positioning are located away from the axis of the light. On reflection significantly affects the provision of parts positioning a S compared with the case where they are not provided. If these parts positioning S provided on the light axis, they can cause significant impact on the efficiency of lighting, but with this configuration there is no such concern.

In this device 10, the display part positioning formed with protrusions 71 to 75, and a printer is receiving portions 31A 35 And, just put each other to determine the position of the blocks 31 to 35 of the light guide. Therefore, the positioning can be performed easily without a lot of time and effort. As the number of components is not increased, there is also a benefit cost.

This device 10 display uses LED (light emitting diodes) as light sources. Thus, there are advantages of longer service life of the light sources and lower the power consumption. In this device 10, the display is provided with the reflecting sheet 42 on respective circuit boards 41, forming a matrix 40R and 40L LED. Therefore, the light emitted from the LED 45, can be done more efficiently incident on the blocks 31 to 35 of the light guide.

The second option exercise

Next will be described a second variant implementation of the present invention with reference to figure 10. Part positioning S, illustrated in the first embodiment, is formed with protrusions 71 75 secured in the chassis 60, and the receiving portions 31A 35 And secured in blocks 31 to 35 of the optical fiber to be aligned with the protrusions 71 to 75.

Part positioning S second variant implementation is configured opposite compared to the parts of the positioning of the first variant implementation. As shown in figure 10, the blocks 131 135 fiber to them who are the tabs a 135 And, and the bottom plate 61 of the chassis 60 has a receiving part (holes) 121 125 to be interfaced with the tabs A on A.

With this configuration, the Central part in the longitudinal direction of the blocks 31 to 35 of the light guide can be located on the center line Lc by inserting protrusions A on A blocks 131 135 fiber in the receiving part 121 125 chassis 60. Thus, the distances Dr and Dl from the LED 45 to the end sides E units 131 through 135 of the light guide can be made the same on the left and right side. Therefore, there may be achieved the same primary outcome (reducing uneven brightness), as in the first embodiment.

A third option exercise

Next will be described a third option of implementing the present invention with reference to 11 on Fig. In the first embodiment, the lighting device that is configured with a plate 30 of the light guide is divided into many blocks 31 to 35, was illustrated as one example of the device 21 lighting. The device 221 lighting of the third variant of implementation differs from the first variant of realization of the fact that the plate 230 of the light guide is not divided and formed with one flat plate, and the fact that part of the positioning S provided in another position, despite the fact that he is not like percivaliana implementation in other characteristics (such as the device of the light source U, the chassis 60 and so on).

As shown in figure 11 on Fig, plate 230 of the light guide made of transparent polymer, such as acrylic) and has a horizontally elongated rectangular shape, which is essentially the same as the shape of the liquid crystal panel 11. Full length L of the plate 230 of the light guide is set shorter than the direct distance Lp between the LED and the reflective sheet 235 is connected with the back of the Century

Plate 230 of the light guide is located in the center of the bottom plate 61 of the chassis 60, and the front side F is facing up. More specifically, as shown in figure 11, the plate 230 of the light guide is located between the pairs of light sources R, and its left and right end side (the surface of light incidence) E turned to the right and left LED. Plate 230 of the light guide is configured so that its Central portion in the longitudinal direction (X direction) is located on the center line Lc through the arrangement of parts positioning S, described below.

More specifically, the two tabs 171 and 172 are provided along the center line Lc, which corresponds to the middle points of the pairs of light sources P on the bottom plate 61 of the chassis 60. More specifically, the protrusions provided no upper and lower ends in the Y direction on the center line Lc. These protrusions 171 and 172 are columnar and perform at nab is the t to the plate 230 of the light guide. The protrusions may be either formed as a whole on the bottom plate 61 of the chassis 60, or may be separate parts.

On the other hand, the plate 230 of the light guide has a corresponding receiving part 231 and 232 on its reverse side In the Central portions in the longitudinal direction to be aligned with the tabs 171 and 172. The receiving part 231 and 232 are located at both ends in the Y direction in the Central part of the plate 230 of the light guide. The receiving part 231 and 232 is configured as a circular recess corresponding to the shape of the projections 171 and 172, so that the tabs 171 and 172 tightly inserted into them (see Fig).

Thus, using the protrusion 171 inserted into the receiving part 231, and the protrusion 172 in the receiving part 232 of the Central part in the longitudinal direction (X direction) of the plate 230 of the light guide is disposed on the center line Lc. Thus, the length of the mr and ml to the left and to the right relative to the center line Lc are the same, as shown in Fig. Thus, the distance (gap) Dr from the end sides of E on the right side plate 230 of the fiber to the LED 45 is equal to the distance (gap) D1 from the end sides on the left side plate 230 of the fiber to the LED 45.

Using this configuration can be achieved the same preemptive effect as in the first embodiment. Namely, the plate 230 SV is the guide undergoes thermal shrinkage using heat, generated by the LED 45, equally on the left and right direction relative to its Central portion fixed in position. Thus, the distances Dr and Dl from the LED 45 to the end sides E support the same on the left and right side, and they remain constant. Therefore, the plate 230 of the light guide emits light evenly on the left and the right side relative to the center line Lc, when the LED 45 is turned on. Therefore, there will be no uneven brightness.

Part positioning S is preferably located outside the display area (a rectangular area indicated by the chain line with two dots on Fig) N liquid crystal display panel. In this embodiment, since each portion of the positioning S is assigned to one of the ends in the Y direction, they are located outside the display area N. Thus, part of the positioning S may not affect the efficiency of the display.

Being located outside the display area H, part positioning S also remain away from the LED 45. Thus, there is no need to pay attention to the installation positions of the matrices 40R and 40L LED relative to the parts of the positioning of S. Hence, the matrix LED placed randomly.

A lighting device having a plate 230 of the light guide is formed with one flat square is tiny, cannot perform scanning backlight. Therefore, the device of the light source U does not necessarily require point light sources (LED) and instead can use a linear light sources, such as a tube with a cold cathode.

Part positioning S, illustrated in this embodiment, is formed with protrusions 171 and 172 provided on the chassis 60, and the receiving portions 231 and 232 provided in the plate 230 of the light guide.

The configuration of the parts positioning S can be inverted, i.e. the protrusions may be provided on the plate 230 of the optical fiber and the receiving part (hole) can be formed in the bottom plate 61 of the chassis 60 to mate with the tabs.

Another option exercise

The present invention is not limited to the implementation described above and illustrated in the drawings. For example, the following implementation options are also included in the technical scope of the present invention.

(1) In the first through third embodiments, the implementation of the protrusions (71 to 75, A on A, 171 and 172) and the receiving part (31A 35A on, 121 125, 231 and 232), forming part of the positioning's have a round shape. However, they may be formed in other shapes, such as square, until they (the protrusion and the receiving part can be inserted into each other.

(2) In the first and the second is the option of implementing each of the pairs of light sources of R generated by one pair of LED 45. However, a pair of light sources R can be formed using two or more pairs of LED 45, as shown in Fig (three pairs in the drawing), while they are formed with pairs of LED 45.

(3) In the first through third embodiments, the implementation of the LED 45 is used as one example of point light sources. However, it can also be used with other light sources such as incandescent bulbs with filaments.

(4) In the first through third embodiments, the implementation of the reflecting plate (reflecting sheet foam PET, a multilayer reflective sheet and so on) is used as an example (“reflecting element”). However, instead of using reflective sheet 42, a white solder resist containing a highly reflective material such as titanium oxide, barium titanite or polycarbonate, may be deposited on the surface of the Board 41. The thickness of the reflective element can be made smaller than with the use of a reflective sheet.

(5) the display Device (liquid crystal display) uses a TFT as switching components in the first through third embodiments, the implementation described above. However, the present technology is also applicable to liquid crystal display devices that use other types of switching components (for example, TFD (thin film diode)). This technologist is I is applicable not only to a color liquid crystal display devices, but also to a monochrome liquid crystal display devices.

(6) the Television receiver includes a tuner in different variants of implementation described above. The present technology is also applicable to the display device without a tuner.

(7) can Also be used LED 45, non-LED, described in the first embodiment, such as LED, described below, as they can emit white light.

LED 45 can be configured by using the light-emitting crystal W, emitting blue light, a layer 48 of phosphorus, is formed around the light emitting crystal V, and having a maximum light emission in the green range, and a light-emitting crystal 46R, emitting red light. With this configuration, the LED 45 emits white light by mixing the respective colors (blue, green and red).

Explanation of symbols

10: the device display

11: liquid crystal panel

21: the device lighting

30: the light guide plate

31 35: unit light guide (one example of “fiber elements” of the present invention)

31A 35A on: the host part of the

40R, 40L: matrix LED (one example of a matrix of point sources of light present invention)

41: fee

42: reflective sheet (one example of a reflective element of the present invention)

p> 45: LED (one example of “point sources shining” of the present invention)

60: chassis (one example of “the body element” of the present invention)

61: bottom plate

65R, 65L: side plate

71 75 ledge

TV: television receiver

P1 through P5: a pair of light sources

S: part positioning

U: the unit of the light source.

1. The lighting device, comprising:
chassis, having essentially a rectangular bottom plate having a short side and a long side;
the light source device, which includes multiple sets of light sources, each of the sets of light sources includes at least two point light source, which is provided close to the short sides, respectively, so as to be facing each other, and the sets of light sources arranged along the short sides,
elements of optical fiber, each of which is provided between each of the sets of light sources, each fiber element has end surfaces of the short sides, which are converted to the corresponding set of light sources, and
part positioning, configured to the layout of the waveguide so that a first line connecting the center point between the end surfaces of the short sides, respectively the n sets of light guide plates, was located on the second line connecting the center point between the respective sets of light sources, and the chassis accommodates a device of the light source and the fiber elements.

2. The lighting device according to claim 1, in which part of the positioning includes a protrusion provided in one of the chassis and elements of the light conductor and the receiving part provided in the other one of the chassis and elements of optical fibers to be aligned with the tab.

3. The lighting device according to one of paragraphs. 1 and 2, in which part of the positioning provided in the middle part of each of the elements of the light guide in such a way as not to overlap the light sources in the plane along the line connecting the corresponding set of light sources.

4. The lighting device, comprising:
chassis, having essentially a rectangular bottom plate having short sides and long sides,
the light source device, which includes multiple sets of light sources, each of the sets of light sources includes at least two light source that is provided close to the short sides, respectively, so as to be facing each other, and the sets of light sources arranged along the short sides,
one of the light guide plate provided between the sets of light sources and have the relevant end surface of the short side, are converted to sets of light sources, and
part positioning, configured to the layout of the fiber so that the Central line of the light guide plate along the short sides was located on the line connecting the center point between the respective sets of light sources, and the chassis accommodates a device of the light source and the light guide plate.

5. The lighting device according to claim 4, in which part of the positioning includes a protrusion provided in one of the chassis and the light guide plate, and a receiving part provided in the other one of the chassis and the light guide plate, in order to be interfaced with the tab.

6. The lighting device according to one of paragraphs. 4 and 5, in which the light sources are point light sources.

7. The lighting device according to one of paragraphs. 1, 2, 4, and 5, in which the device of the light source is a matrix of point light sources, which includes the border that runs parallel to the short side and point sources of light sets of light sources arranged on it in a row.

8. The lighting device according to claim 7, in which the matrix of point light sources attached to the chassis.

9. The lighting device according to claim 7, further containing a reflective element provided on the circuit Board and configured with capacity is through the reflection of light from point light sources.

10. The lighting device according to claim 9, in which the reflective element is a reflective sheet of foam PET.

11. The lighting device according to claim 9, in which the reflective element is a multilayer reflective sheet.

12. The lighting device according to claim 9, in which the reflective element is formed of a reflective resist.

13. The lighting device according to any one of paragraphs. 1, 2, 4, 5, 8, 9, 10, 11 and 12, in which point light sources are white LEDs.

14. The lighting device according to item 13, in which each white led includes a light-emitting crystal, emitting blue light, and a fluorescent layer formed around the light emitting chip and having a maximum light emission in the yellow range.

15. The lighting device according to item 13, in which each white led includes a light-emitting crystal, emitting blue light, and a fluorescent layer formed around the light emitting chip and each having the maximum light emission in bands of green and red.

16. The lighting device according to item 13, in which each white led includes a light-emitting crystal, emitting blue light, a fluorescent layer formed around the light emitting chip and having a maximum light emission in the green range, and a light-emitting crystal, emitting red light.

17. The lighting device according to item 13, in which each white led includes a light-emitting crystal, emitting blue light, a light-emitting crystal, emitting green light, and a light-emitting crystal, emitting red light.

18. The lighting device according to item 13, in which each white led includes a light-emitting crystal, emitting ultraviolet light and a fluorescent layer formed around the light emitting chip and each having the maximum light emission in the range of blue, green and red.

19. A display device, comprising:
the lighting device according to any one of paragraphs. 1 through 18, and
the liquid crystal display panel that displays an image using light from the lighting device.

20. A display device, comprising:
the lighting device according to any one of paragraphs. 4 through 6, and
the liquid crystal display panel that displays an image using light from the lighting device, and part positioning is located in the middle part of the light guide plate and outside the display area of the liquid crystal display panel.

21. Television receiver containing the display device according to one of paragraphs. 19 and 20.



 

Same patents:

FIELD: electricity.

SUBSTANCE: backlighting device (20) comprises a substrate (22), where multiple point sources of light are placed in the form of light diodes (21), and slots (23), which are also arranged on the substrate. Multiple point sources of light include the first point source of light (21), which is placed near the slot (23), and the second point source of light (21), which is placed in a position distant from the slot (23) compared to the first point source of light (21). The light beam in the surroundings of the slots is higher than the light beam in the area different from the surroundings of the slots.

EFFECT: reduced heterogeneity of brightness of a display panel without increase in number of process operations.

15 cl, 12 dwg

FIELD: electricity.

SUBSTANCE: in carrier pin (11) used for support of optical elements (43-45) though which part of light passes from light-emitting diode (24) a part of peak (14) contacting with light-diffusing plate (43) is formed of light-reflective material while a part of rack (12) supporting peak (14) is formed of light-transmitting material.

EFFECT: eliminating mom-uniformity of lighting.

12 cl, 13 dwg

FIELD: physics.

SUBSTANCE: backlight unit (49) of a display device (69), having a liquid crystal display panel (59), has a base (41), a diffusing plate (43) which is supported by the base, and a point light source for irradiating the diffusing plate with light. The point light source has a light-emitting diode (22) mounted on a mounting substrate (21). A plurality of light-emitting diodes covered by divergent lenses (24) are provided. Optical axes (OA) of the divergent lenses are inclined relative the diffusing plate, and the divergent lenses, having different inclinations of optical axes, are placed randomly on the base. The divergent lenses, having optical axes that are inclined in opposite directions, are paired and the pairs are arranged in a matrix.

EFFECT: reduced non-uniformity of luminance and hue.

25 cl, 12 dwg

FIELD: electricity.

SUBSTANCE: lighting device 12 comprises multiple point sources 17 of light and a base 14, where point sources of light 17 are placed, which are classified into two or more colour ranges A, B and C, in accordance with light colours. Each colour range is defined by means of a square, each side of which has length equal to 0.01 in the colour schedule of light space of the International Lighting Commission 1931.

EFFECT: reproduction of light of practically even light.

26 cl, 15 dwg

FIELD: physics.

SUBSTANCE: invention relates to organic light-emitting diode (OLED) solid-state light sources used to make colour information screens and colour display devices with high consumer properties, as well as cheap and efficient light sources. Disclosed is an OLED, having a base in form of a transparent substrate having a transparent anode layer and a metal cathode layer with a light-emitting layer in between, which is based on a dendronised polyaryl silane of general formula (I) or (II) , where n is an integer from 5 to 1000.

EFFECT: wide range of OLEDs with high operational characteristics, particularly in the radiation range of 400-700 nm, which enables use thereof as light sources.

7 cl, 3 dwg, 6 ex

FIELD: electricity.

SUBSTANCE: back light unit (49) for display device (69) equipped with LCD panel (59) contains a frame (41), dissipating plate (43) supported by the frame and point light sources supported by mounting substrates (21) provided at the frame. Point light sources contain LEDs (22) installed at mounting substrates. Mounting substrates (21) are interconnected by connectors (25) thus forming rows (26) of mounting substrates (21). Varieties of rows (26) of mounting substrates (21) are located in parallel; a row (26) of mounting substrates (21) is formed by long and short mounting substrates (21) and location of such long and short mounting substrates (21) is changed to the opposite row-by-row. Positions of connectors (25) are not levelled in a straight line in direction of rows (26) of mounting substrates (21).

EFFECT: providing uniform brightness of the dissipating plate.

23 cl, 10 dwg

FIELD: electricity.

SUBSTANCE: backlighting unit (49) for a display device (69) equipped with a liquid crystal display panel (59) comprises a base (41), a diffusing plate (43), supported by means of the base, and point sources of light, supported by means of mounting substrates (21), provided on the base. Point sources of light contain modules of light emission (MJ). Mounting substrates are arranged in the rectangular area (41a) suitable for location of mounting substrates in it and arranged on the base. Gaps at the borders between mounting substrates do not stretch in any direction along long sides and/or in direction along short sides of the rectangular area, in order to provide for the possibility to see the rectangular area from the edge to the edge.

EFFECT: achievement of homogeneity of reflection ratio.

16 cl

FIELD: electricity.

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

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

36 cl, 29 dwg

FIELD: physics.

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EFFECT: increase in surface area of the radiator without increase in linear dimensions of the lamp.

2 cl, 2 dwg

FIELD: optics.

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EFFECT: expanded functional capabilities.

10 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: backlighting device (20) comprises a substrate (22), where multiple point sources of light are placed in the form of light diodes (21), and slots (23), which are also arranged on the substrate. Multiple point sources of light include the first point source of light (21), which is placed near the slot (23), and the second point source of light (21), which is placed in a position distant from the slot (23) compared to the first point source of light (21). The light beam in the surroundings of the slots is higher than the light beam in the area different from the surroundings of the slots.

EFFECT: reduced heterogeneity of brightness of a display panel without increase in number of process operations.

15 cl, 12 dwg

FIELD: electricity.

SUBSTANCE: backlight unit (12) includes LEDs as light sources, a LED board (18) on which LEDs are mounted, a frame (14), which holds the LED board (18) and has a connection opening (14e), a housing part (24), which clamps the LED board (18) between the housing part (24) and the frame (14) and holds the LED board (18), and a board-holding element (20), having a connection part (25) which protrudes from the housing part (24) towards the frame (14), so as to enter the connection opening (14e), and the board-holding element (20) is configured to rotate along the flat surface of the frame (14) between a holding position, in which the connection part (25) overlaps with the edge of the connection opening (14e) in the plan view, and presses the edge of the connection opening (14e) between the connection part (25) and the housing part (24), and a non-holding position in which the connection part (25) does not overlap with the edge of the connection opening (14e) in the plan view, and connection and disconnection of the connection part (25) from the connection opening (14e) is allowed.

EFFECT: improved holding and freeing of the light source board.

55 cl, 87 dwg

FIELD: electricity.

SUBSTANCE: in carrier pin (11) used for support of optical elements (43-45) though which part of light passes from light-emitting diode (24) a part of peak (14) contacting with light-diffusing plate (43) is formed of light-reflective material while a part of rack (12) supporting peak (14) is formed of light-transmitting material.

EFFECT: eliminating mom-uniformity of lighting.

12 cl, 13 dwg

FIELD: physics.

SUBSTANCE: backlight unit (49) of a display device (69), having a liquid crystal display panel (59), equipped with a base (41), a diffusing plate (43) mounted on the base, and a light source which illuminates the diffusing plate with light. The light source has a plurality of light-emitting modules (MJ) which include a light-emitting diode (22) which serves as a light-emitting element, and a divergent lens (24) covering the light-emitting diode. The light-emitting modules are placed on a grid on the base supporting the diffusing plate. Carrier pins (26) for mounting the diffusing plate are located on points on the base. The carrier pins are placed on sections of lines linking neighbouring pairs of light-emitting modules.

EFFECT: eliminating non-uniformity of luminance.

10 cl, 14 dwg

FIELD: physics.

SUBSTANCE: backlight unit (49) of a display device (69), having a liquid crystal display panel (59), has a base (41), a diffusing plate (43) which is supported by the base, and a point light source for irradiating the diffusing plate with light. The point light source has a light-emitting diode (22) mounted on a mounting substrate (21). A plurality of light-emitting diodes covered by divergent lenses (24) are provided. Optical axes (OA) of the divergent lenses are inclined relative the diffusing plate, and the divergent lenses, having different inclinations of optical axes, are placed randomly on the base. The divergent lenses, having optical axes that are inclined in opposite directions, are paired and the pairs are arranged in a matrix.

EFFECT: reduced non-uniformity of luminance and hue.

25 cl, 12 dwg

FIELD: electricity.

SUBSTANCE: lighting device 12 comprises multiple point sources 17 of light and a base 14, where point sources of light 17 are placed, which are classified into two or more colour ranges A, B and C, in accordance with light colours. Each colour range is defined by means of a square, each side of which has length equal to 0.01 in the colour schedule of light space of the International Lighting Commission 1931.

EFFECT: reproduction of light of practically even light.

26 cl, 15 dwg

FIELD: electricity.

SUBSTANCE: unit 12 of backlight includes a LED (17), a circuit board (18) of LEDs, a connector (25), a reflecting sheet (22) at the side of the base and a support (26). The LED (17) is a source of light. The LED (17) is mounted on the circuit board (18) of the LEDs. The connector (25) is a mounted component mounted on the mounting surface (18a) of the circuit board (18) of LEDs, on which the LED (17) is mounted. The reflecting sheet (22) at the side of the base is a reflecting sheet (21), made as capable of reflecting light and arranged on the side, where there is the mounting surface (18a). The mounting surface (18a) is the surface, on which the LED (17) and the connector (25) are mounted. The support (26) retains the reflecting sheet (22) at the side of the base at the distance from the mounting surface (18a) of the circuit board (18) of the LEDs.

EFFECT: reduced heterogeneity of emitted light.

25 cl, 27 dwg

FIELD: electricity.

SUBSTANCE: lighting device includes multiple LED 16, circuit board 17S LED, chassis 14, connection component 60 and reflecting plate 21. LED 16 are installed on circuit board 17S LED. Both plates 17S and 17C LED are attached to chassis 14. Connection component 60 is electrically connects circuit boards 17S and 17C LED between each other. Reflecting plate 21 is put on surface 17A of light sources installation. In the lighting device, connection component 60 is located on surface 17B of attachment of connection component of circuit board 17S LED. Surface 17B of attachment of connection device is opposite to the surface, on which reflecting plate 21 is put.

EFFECT: increasing brightness of reflected light.

23 cl, 22 dwg

FIELD: electricity.

SUBSTANCE: back light unit (49) for display device (69) equipped with LCD panel (59) contains a frame (41), dissipating plate (43) supported by the frame and point light sources supported by mounting substrates (21) provided at the frame. Point light sources contain LEDs (22) installed at mounting substrates. Mounting substrates (21) are interconnected by connectors (25) thus forming rows (26) of mounting substrates (21). Varieties of rows (26) of mounting substrates (21) are located in parallel; a row (26) of mounting substrates (21) is formed by long and short mounting substrates (21) and location of such long and short mounting substrates (21) is changed to the opposite row-by-row. Positions of connectors (25) are not levelled in a straight line in direction of rows (26) of mounting substrates (21).

EFFECT: providing uniform brightness of the dissipating plate.

23 cl, 10 dwg

FIELD: electricity.

SUBSTANCE: backlighting unit (49) for a display device (69) equipped with a liquid crystal display panel (59) comprises a base (41), a diffusing plate (43), supported by means of the base, and point sources of light, supported by means of mounting substrates (21), provided on the base. Point sources of light contain modules of light emission (MJ). Mounting substrates are arranged in the rectangular area (41a) suitable for location of mounting substrates in it and arranged on the base. Gaps at the borders between mounting substrates do not stretch in any direction along long sides and/or in direction along short sides of the rectangular area, in order to provide for the possibility to see the rectangular area from the edge to the edge.

EFFECT: achievement of homogeneity of reflection ratio.

16 cl

FIELD: signaling devices, mainly beacon apparatuses and railway traffic lights.

SUBSTANCE: the device has a radiation source isolated from exposure to environment by a transparent shell connected to the body, as well as contacts and a pin with semiconductor crystals positioned on it, which serve as a radiation source. The transparent shell has a cover from above, and the body has openings for input of flexible conductors to the contacts. The pin is made in the form of a printed-circuit board, and the semiconductor crystals are grouped together in light-emitting diode modules located at nine levels. At the first and ninth levels positioned are three light-emitting diode modules at each, at the second level-six light-emitting diode modules, at the third, fourth and sixth levels-eight-emitting diode modules at each, at the fifth level-nine light-emitting diode modules, at the seventh level-seven light-emitting diode modules, at the eight level-six light-emitting diode modules. The modules are installed at proper distances from the transparent shell and at angles to the optical axis providing for production of crossing light flows formed in the preset directions. The transparent shell is made in the form of an arc providing for light transmission within the frequency range 460 to 633 lm.

EFFECT: enhanced intensity of radiation and expanded field of application of the signaling lighting unit.

1 dwg

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