WO2012017765A1 - Illuminating device, display device and television receiver - Google Patents

Abstract

An illuminating device for which the cost of conductive members can be reduced is provided. This illuminating device is characterized by including: an LED substrate (30A) having LEDs (17A) mounted thereon; an LED substrate (30B) having LEDs (17B) mounted thereon and arranged in parallel with the LED substrate (30A); a first conducting path (32A) formed on the LED substrate (30A) and electrically connected to the LEDs (17A); a second conducting path (32B) formed on the LED substrate (30B) and electrically connected to the LEDs (17B); and a power supply unit (40) capable of supplying power for driving the LEDs (17A, 17B). The illuminating device is characterized in that the power supply unit (40) is electrically connected to ends of the first conducting path (32A) and the second conducting path (32B) on the same side in the direction intersecting the parallel direction of the LED substrates (30A, 30B), and that a connecting member (35) electrically couples ends of the first conducting path (32A) and the second conducting path (32B) opposite to the ends on the same side.

Description

Lighting device, display device, and television receiver

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

For example, since a liquid crystal panel used in a liquid crystal display device such as a liquid crystal television does not emit light, a backlight device is separately required as a lighting device. As such a backlight device, one installed on the back side of the liquid crystal panel (opposite to the display surface) is well known, and a chassis having an open surface on the liquid crystal panel side, accommodated in the chassis, A light source board on which the light source is mounted; and a power supply unit that supplies driving power to each light source. In addition, a plurality of such light source substrates are arranged in the chassis, and the light source is arranged in a planar shape so that light can be emitted over the entire surface of the liquid crystal panel.

By the way, in the liquid crystal display device including the light source substrate as described above, both ends of the conductive path formed on the light source substrate and the power supply unit are electrically connected to each other via the light source substrate (conductive path). Thus, power is supplied to the light source. For this reason, what is provided with the terminal (connector etc.) for connecting with an electric power supply part in the both ends of a light source board | substrate is known (for example, refer patent document 1). Each terminal and the power supply unit are electrically connected through a conductive member such as a lead wire, for example.

JP 2006-301209 A

(Problems to be solved by the invention)
By the way, with the recent increase in size of liquid crystal display devices, the number of installed light source substrates tends to increase. In the thing of the said patent document 1, as the number of light source boards increases, the number of the electrically-conductive members mentioned above also becomes a huge number. Thereby, there is a concern that the cost related to the conductive member increases.

The present invention has been made based on the above-described circumstances, and an object thereof is to provide an illuminating device capable of reducing the cost associated with a conductive member. Moreover, an object of this invention is to provide the display apparatus provided with such an illuminating device, and also the television receiver provided with such a display apparatus.

(Means for solving problems)
In order to solve the above-described problems, an illumination apparatus according to the present invention includes a first light source board on which a plurality of first light sources are mounted, and a plurality of second light sources, which are arranged in parallel with the first light source board. The second light source substrate, the first conductive path formed on the first light source substrate and electrically connected to each of the first light sources, the second light source substrate, and the second light source substrate. Electrically connecting a second conductive path electrically connected to each other, a power supply unit capable of supplying drive power to the first light source and the second light source, and the first conductive path and the second conductive path A connector member connected to the power source, wherein the power supply unit is provided on the same side of the first conductive path and the second conductive path in a direction crossing a parallel direction of the first light source board and the second light source board. Each of the connector members is electrically connected at the end, and the connector member is connected to the first conductive member. And wherein the said second conductive path and the same end is configured to electrically connect the ends of the opposite side.

According to the present invention, the power supply unit is connected to the end (one end) on the same side of the first conductive path and the second conductive path, and is connected to the same side of the first conductive path and the second conductive path by the connector member. End portions (other end portions) opposite to the end portions are connected to each other. Thus, a circuit is formed by the power supply unit, the first conductive path (a plurality of first light sources), the connector member, and the second conductive path (a plurality of second light sources), and the first power is supplied from the power supply unit by the driving power. The light source and the second light source can be driven.

In other words, the other end portion of the first conductive path and the power supply unit are electrically connected via the second conductive path. Further, the other end of the second conductive path and the power supply unit are electrically connected via the first conductive path. For this reason, it is not necessary to provide a conductive member (such as a conductive path) for electrically connecting the other end of the first conductive path (or the other end of the second conductive path) and the power supply unit. The cost concerning can be reduced.

And the electric power supply part is electrically connected with each conductive path in the edge part of the same side in a 1st conductive path and a 2nd conductive path. If it does in this way, compared with the structure which electrically connects an electric power supply part with the one end part of a 1st conductive path and the other end part of a 2nd conductive path, for example, the length of the electrically-conductive member required for a connection Can be reduced. Further, the connector member is connected to the same side end of the first conductive path and the second conductive path (the end opposite to the end to which the power supply unit is connected). If it does in this way, compared with the structure which connects the other end part of a 1st conductive path and the one end part of a 2nd conductive path with a connector member, for example, a connector member can be made smaller.

The said structure WHEREIN: The said 1st light source board | substrate and the said 2nd light source board | substrate are provided, The said light source board is equipped with the some light source board | substrate arrange | positioned along the said parallel direction, The 1st light source among these light source boards | substrates The substrate and the second light source substrate may be arranged adjacent to each other in the parallel direction.

With such a configuration, the first conductive path and the second conductive path can be arranged closer to each other in the parallel direction. As a result, the length of the connector member that connects the first conductive path and the second conductive path in the same direction can be further reduced, and the cost associated with the connector member can be reduced.

In addition, the first light source substrate and the second light source substrate, including a plurality of light source substrates arranged in parallel along the parallel direction, each of the plurality of light source substrates includes a light source, Among the plurality of light source boards, the luminance of the light source provided in the end side light source board arranged on the end side in the parallel direction is the central part arranged on the central side in the parallel direction among the plurality of light source boards. It can be set at a lower luminance than the luminance of the light source provided in the side light source substrate.

In the illumination device of the present invention, the luminance of the light source of the light source substrate disposed on the end side among the plurality of light source substrates is configured to be lower than the luminance of the light source of the light source substrate disposed on the center side. For this reason, when this illuminating device is used for a display apparatus, the brightness | luminance of the peripheral part of a display surface can be made lower than the brightness | luminance of a center part. Thereby, in the display device, the luminance at the peripheral edge portion of the display surface can be made lower than the luminance at the center portion as a gazing point, and it is possible to display an image that is not uncomfortable for humans and less fatigued. Become.

Further, in the first light source substrate, a first one end side terminal is provided at an end portion on the same side of the first conductive path, and a first other end side terminal is provided at an end portion on the opposite side. In the light source substrate, a second one end side terminal is provided at an end portion on the same side of the second conductive path, and a second other end side terminal is provided at the opposite end portion. 2 one end side terminal is electrically connected with the power supply unit,
The first other end side terminal and the second other end side terminal may be electrically connected to the connector member.

Since the first conductive path and the second conductive path can be electrically connected by connecting the first other end side terminal and the second other end side terminal to the connector member, the connection work can be performed relatively easily. Can do.

Also, the first other end side terminal and the second other end side terminal may be arranged at positions adjacent to each other in the parallel direction.

Thus, by arranging the first other end side terminal and the second other end side terminal at positions adjacent to each other, both terminals can be brought as close as possible. Thereby, the length of the connector member which connects both terminals can be made smaller, and the cost concerning the connector member can be reduced.

The first light source substrate and the second light source substrate have a longitudinal shape, and a long side direction of the first light source substrate and the second light source substrate intersects a parallel direction of the first light source substrate and the second light source substrate. It can be arranged in a form along the direction.

In addition, the first conductive path extends along the long side direction of the first light source substrate, and a plurality of the first light sources are arranged along the extending direction of the first conductive path, The second conductive path is extended along the long side direction of the second light source substrate, and a plurality of the second light sources are arranged along the extending direction of the second conductive path. be able to.

Also, light emitting diodes can be exemplified as the first light source and the second light source. In this way, the life of the light source can be extended and the power consumption can be reduced.

The light emitting diode can be a light emitting diode that emits white light by including a blue light emitting chip and a phosphor having a light emission peak in a yellow region.

The light emitting diode can be a light emitting diode that emits white light by including a blue light emitting chip, a phosphor having a light emission peak in a green region, and a phosphor having a light emission peak in a red region.

Also, the light emitting diode can be a light emitting diode that emits white light by including a blue light emitting chip, a red light emitting chip, and a phosphor having a light emission peak in a green region.

The light emitting diode may be a light emitting diode that emits white light by including a blue light emitting chip, a red light emitting chip, and a green light emitting chip. When a light emitting diode that emits white light is used, variation in color tone is likely to occur due to, for example, bluishness in white. Therefore, by applying the configuration of the present invention, the color tone is averaged as a whole, and illumination light having a substantially uniform color tone can be obtained.

The light emitting diode may be a light emitting diode that emits white light by including an ultraviolet light emitting chip and a phosphor.
In particular, the light emitting diode includes an ultraviolet light emitting chip, a phosphor having a light emission peak in a blue region, a phosphor having a light emission peak in a green region, and a phosphor having a light emission peak in a red region. By providing, it can be set as the light emitting diode which light-emits white. Even in such a light source, although the color tone is likely to vary, by applying the configuration of the present invention, the color tone is averaged as a whole, and illumination light having a substantially uniform color tone can be obtained.

Next, in order to solve the above-described problem, the illumination apparatus and a display panel that performs display using light from the illumination apparatus are provided. According to such a display device, since the cost can be reduced in the lighting device, the cost can also be reduced in the display device.

Also, a liquid crystal panel can be exemplified as the display panel. Such a display device can be applied as a liquid crystal display device to various uses such as a display of a television or a personal computer, and is particularly suitable for a large screen.

Next, in order to solve the above-described problem, a television receiver according to the present invention includes the display device. According to such a television receiver, since the cost can be reduced in the display device, the cost can be reduced also in the television receiver, and as a result, a low-cost television receiver can be provided.

(The invention's effect)
ADVANTAGE OF THE INVENTION According to this invention, the illuminating device which can reduce the cost which concerns on an electrically-conductive member can be provided. Moreover, it aims at providing the display apparatus provided with such an illuminating device, and a television receiver.

The disassembled perspective view which shows schematic structure of the television receiver which concerns on Embodiment 1 of this invention. The disassembled perspective view which shows schematic structure of the liquid crystal display device with which a television receiver is provided. The top view which shows the arrangement | positioning aspect of the LED board in a chassis. Sectional drawing which shows the cross-sectional structure along the short side direction of a liquid crystal display device. Sectional drawing which shows the cross-sectional structure along the long side direction of a liquid crystal display device. The expanded sectional view which expands and shows the LED periphery in FIG. The top view which shows typically the structure which concerns on the connection of each LED and an electric power supply part. The top view which shows typically the wiring structure of each LED and an electric power supply part. The top view which shows a comparative example in the wiring structure of each LED and an electric power supply part. The top view which shows typically the structure which concerns on the connection of each LED which concerns on Embodiment 2 of this invention, and an electric power supply part. The top view which shows typically the structure which concerns on the connection of each LED which concerns on Embodiment 3 of this invention, and an electric power supply part. The top view which shows typically the structure which concerns on the connection of each LED which concerns on Embodiment 4 of this invention, and an electric power supply part. The top view which shows typically the structure which concerns on the connection of each LED which concerns on Embodiment 5 of this invention, and an electric power supply part. The top view which shows typically the structure which concerns on the connection of each LED and power supply part which concern on Embodiment 6 of this invention. The top view which shows typically the structure which concerns on the connection of each LED which concerns on Embodiment 7 of this invention, and an electric power supply part. The top view which shows typically the structure which concerns on the connection of each LED which concerns on Embodiment 8 of this invention, and an electric power supply part. The top view which shows typically the structure which concerns on the connection of each LED and power supply part which concern on Embodiment 9 of this invention. The top view which shows typically the structure which concerns on the connection of each LED which concerns on Embodiment 10 of this invention, and an electric power supply part.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a configuration of a television receiver TV including the liquid crystal display device 10 will be described. A part of each drawing shows an X axis, a Y axis, and a Z axis. The long side direction of the liquid crystal display device 10 (and the chassis 14) is the X-axis direction, and the short side direction is the Y-axis direction. 4 and 5 is the Z-axis direction (front and back direction), the upper side in FIGS. 4 and 5 is the front side, and the lower side is the back side.

As shown in FIG. 1, the television receiver TV according to the present embodiment includes a liquid crystal display device 10, front and back cabinets Ca and Cb that are accommodated so as to sandwich the liquid crystal display device 10, a power source P, a tuner T, And a stand S.

The liquid crystal display device 10 (display device) has a horizontally long rectangular shape (rectangular shape, rectangular shape) as a whole, and is accommodated in a vertically placed state. As shown in FIG. 2, the liquid crystal display device 10 includes a liquid crystal panel 11 that is a display panel and a backlight device 12 (illumination device) that is an external light source, which are integrated by a frame-like bezel 13 or the like. Is supposed to be retained.

Next, the liquid crystal panel 11 constituting the liquid crystal display device 10 will be described. Among these, the liquid crystal panel 11 (display panel) has a horizontally long rectangular shape when seen in a plane, and a pair of glass substrates are bonded together with a predetermined gap therebetween, and liquid crystal is interposed between the glass substrates. It is set as the enclosed structure. One glass substrate is provided with a switching element (for example, TFT) connected to a source wiring and a gate wiring orthogonal to each other, a pixel electrode connected to the switching element, an alignment film, and the like. The substrate is provided with a color filter and counter electrodes in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement, and an alignment film. A polarizing plate (not shown) is disposed outside both substrates.

Next, the backlight device 12 will be described in detail. As shown in FIG. 2, the backlight device 12 covers the chassis 14 having a substantially box shape having an opening 14 b on the light emitting surface side (the liquid crystal panel 11 side), and the opening 14 b of the chassis 14. An optical member 15 (diffusing plate 15a, a plurality of optical sheets 15b arranged between the diffusing plate 15a and the liquid crystal panel 11), and an outer edge portion of the chassis 14; And a frame 16 that holds the outer edge portion between the chassis 14 and the frame 16.

Further, in the chassis 14, an LED 17 (Light Emitting Diode) as a light source, an LED board 30 (light source board) on which the LED 17 is mounted, and a diffusion lens attached to a position corresponding to the LED 17 on the LED board 30. 19 is provided. In addition, the chassis 14 includes a holding member 20 that can hold the LED substrate 30 between the chassis 14 and a light reflecting sheet 21 that reflects the light in the chassis 14 toward the optical member 15. It is done. In the backlight device 12, the optical member 15 side is the light emission side from the LED 17. Below, each component of the backlight apparatus 12 is demonstrated in detail.

The chassis 14 is made of metal, and as shown in FIGS. 2 and 3, a bottom plate 14a having a horizontally long rectangular shape (rectangular shape, rectangular shape) like the liquid crystal panel 11, and each side (a pair of bottom plates 14a) It consists of a side plate 14c rising from the outer end of the long side and a pair of short sides toward the front side (light emitting side), and a receiving plate 14d projecting outward from the rising end of each side plate 14c. It has a shallow box shape (substantially a shallow dish) that opens toward the top.

The long side direction of the chassis 14 coincides with the X-axis direction (horizontal direction), and the short side direction thereof coincides with the Y-axis direction (vertical direction). A frame 16 and an optical member 15 can be placed on each receiving plate 14d in the chassis 14 from the front side. A frame 16 is screwed to each receiving plate 14d. An attachment hole 14e for attaching the holding member 20 is provided in the bottom plate 14a of the chassis 14 (see FIG. 6). The mounting hole 14e is formed corresponding to the mounting position of the holding member 20 in the bottom plate 14a.

As shown in FIG. 2, the optical member 15 has a horizontally long rectangular shape (rectangular shape) in a plan view, like the liquid crystal panel 11 and the chassis 14. As shown in FIG. 4, the optical member 15 has its outer edge portion placed on the receiving plate 14 d so as to cover the opening portion 14 b of the chassis 14 and is interposed between the liquid crystal panel 11 and the LED 17. .

The optical member 15 includes a diffusion plate 15a disposed on the back side (the side opposite to the LED 17 side and the light emitting side) and an optical sheet 15b disposed on the front side (the liquid crystal panel 11 side and the light emitting side). . The diffusing plate 15a has a structure in which a large number of diffusing particles are dispersed in a substantially transparent resin base material having a predetermined thickness, and has a function of diffusing transmitted light. The optical sheet 15b has a sheet shape that is thinner than the diffusion plate 15a. For example, two optical sheets 15b are stacked. Specific types of the optical sheet 15b include, for example, a diffusion sheet, a lens sheet, a reflective polarizing sheet, and the like, which can be appropriately selected and used.

As shown in FIG. 2, the frame 16 has a frame shape along the outer peripheral edge portions of the liquid crystal panel 11 and the optical member 15. An outer edge portion of the optical member 15 can be sandwiched between the frame 16 and each receiving plate 14d (FIGS. 4 and 5). The frame 16 can receive the outer edge portion of the liquid crystal panel 11 from the back side, and can sandwich the outer edge portion of the liquid crystal panel 11 with the bezel 13 disposed on the front side (FIGS. 4 and 5). ).

Next, the LED substrate 30 on which the LEDs 17 are mounted will be described. As shown in FIG. 6, the LED 17 has a configuration in which an LED chip is sealed with a resin material on a substrate portion fixed to the LED substrate 30. The LED chip mounted on the substrate unit has one kind of main emission wavelength, and specifically, a blue light emitting chip that emits blue light in a single color is used. On the other hand, the resin material that seals the LED chip is dispersed and blended with a phosphor that emits a predetermined color when excited by the blue light emitted from the LED chip. The LED 17 generally emits white light. It is supposed to be.

As the phosphor blended in the resin material, for example, a yellow phosphor having a light emission peak in a yellow region (that is, a phosphor that emits yellow component light when excited by light from a blue light emitting chip) is used. be able to. Instead of the yellow phosphor, a combination of a phosphor having an emission peak in the green region and a phosphor having an emission peak in the red region may be used. The LED 17 is a so-called top type in which a surface opposite to the mounting surface with respect to the LED substrate 30 (a surface facing the optical member 15) is a light emitting surface.

As shown in FIGS. 3 and 4, the LED substrate 30 has a long shape (horizontal square shape) in plan view, the long side direction matches the X axis direction, and the short side direction is the Y axis direction. In the chassis 14 while extending along the bottom plate 14a. The base material of the LED substrate 30 is made of a metal such as the same aluminum material as the chassis 14, for example. In addition, as a material used for the base material of the LED substrate 30, an insulating material such as ceramic can be used.

The LED 17 having the above-described configuration is surface-mounted on the surface facing the front side (the surface facing the optical member 15 side) of the plate surface of the LED substrate 30. A plurality of LEDs 17 are linearly arranged in parallel along the long side direction (X-axis direction) of the LED substrate 30. The arrangement pitch of the LEDs 17 is substantially constant, and the LEDs 17 are arranged at equal intervals in the X-axis direction.

As shown in FIG. 3, a plurality of LED substrates 30 having the above-described configuration are arranged in parallel in the chassis 14 in a state where the long side direction and the short side direction are aligned with each other in the Y-axis direction. That is, the LEDs 17 mounted on each LED substrate 30 are arranged in a matrix (planar arrangement) in the chassis 14.

Further, the arrangement pitch of the LED substrates 30 arranged along the Y-axis direction is substantially equal. Accordingly, the LEDs 17 arranged in a plane along the bottom plate 14a in the chassis 14 are arranged at substantially equal intervals in the X-axis direction and the Y-axis direction. That is, the distribution density of the LEDs 17 arranged in the plane of the bottom plate 14a is substantially uniform.

The diffusing lens 19 is made of a synthetic resin material (for example, polycarbonate or acrylic) that is almost transparent (having high translucency) and has a higher refractive index than air. As shown in FIGS. 3 and 6, the diffusing lens 19 has a predetermined thickness and is formed in a substantially circular shape when seen in a plan view. The diffusing lens 19 is attached to the LED substrate 30 and individually covers the LEDs 17 from the front side, that is, a shape overlapping with the LEDs 17 when viewed in a plane, more specifically, substantially concentric with the LEDs 17 when viewed in a plane. Arranged in position.

In the diffusing lens 19, the surface facing the back side and facing the LED substrate 30 (LED 17) is a light incident surface 19 a on which light from the LED 17 is incident. On the other hand, in the diffusing lens 19, the surface facing the front side and facing the optical member 15 is a light emitting surface 19b that emits light.

As shown in FIG. 6, the light incident surface 19 a is formed in parallel with the plate surface (X-axis direction and Y-axis direction) of the LED substrate 30 as a whole, but overlaps the LED 17 in plan view. By forming the light incident side concave portion 19c in the region, it has an inclined surface inclined with respect to the optical axis LA of the LED 17.

The light incident side recess 19c has a substantially conical shape with an inverted V-shaped cross section, and is disposed at a position that is concentric with the LED 17 in plan view. The light emitted from the LED 17 and entering the light incident side concave portion 19c enters the diffuser lens 19 while being refracted at a wide angle by the inclined surface of the light incident side concave portion 19c. Further, a plurality of mounting legs 19 d are projected from the light incident surface 19 a, and the mounting legs 19 d are configured to be attached to the LED substrate 30.

The light exit surface 19b is formed in a flat and substantially spherical shape, and thereby allows the light exiting from the diffusion lens 19 to exit while being refracted at a wide angle. A light exit side recess 19e having a substantially conical shape (substantially mortar shape) is formed in a region of the light exit surface 19b that overlaps the LED 17 when seen in a plan view. By this light emitting side recess 19e, most of the light from the LED 17 can be emitted while being refracted at a wide angle, or a part of the light from the LED 17 can be reflected to the LED substrate 30 side.

The diffusion lens 19 can emit the light emitted from the LED 17 while diffusing it. The light emitted from the LED 17 has a relatively high directivity, but the directivity is reduced by passing through the diffusion lens 19. Thereby, even if it arrange | positions the arrangement space | interval of each LED17, it becomes difficult to visually recognize the area | region between each LED17 as a dark part. For this reason, it is possible to reduce the number of installed LEDs 17.

Subsequently, the holding member 20 will be described. The holding member 20 is made of a synthetic resin such as polycarbonate, and has a white surface with excellent light reflectivity. As shown in FIG. 6, the holding member 20 includes a main body portion 20 a along the plate surface of the LED substrate 30, and a fixing portion 20 b that protrudes from the main body portion 20 a toward the back side, that is, the chassis 14 side and is fixed to the chassis 14. Is provided.

As shown in FIG. 3, the main body 20 a has a substantially circular plate shape in plan view, and can sandwich both the LED board 30 and the light reflecting sheet 21 described below with the bottom plate 14 a of the chassis 14. (See FIG. 6). The fixing portion 20b is inserted into the insertion hole 31 and the attachment hole 14e respectively formed corresponding to the mounting positions of the holding member 20 on the LED board 30 and the bottom plate 14a of the chassis 14, and then the tip of the fixing portion 20b is the bottom plate. It is set as the structure which can be latched from the back side with respect to 14a. As shown in FIG. 3, a large number of the holding members 20 are arranged in parallel in the plane of the LED substrate 30, and specifically, between adjacent diffusion lenses 19 (LEDs 17) in the X-axis direction. It is arranged at each position.

Of the holding members 20, the two holding members 20 arranged near the center of the screen are provided with support portions 20c that protrude from the main body portion 20a to the front side, as shown in FIGS. The support portion 20c has a substantially conical shape formed such that its diameter decreases toward the projecting end, and the projecting end is formed in a curved surface shape.

The diffusing plate 15a can be supported from the back side by the protruding end of the support portion 20c, and thereby, inadvertent deformation of the optical member 15 (for example, partial bending of the optical member 15) can be suppressed. As a result, the positional relationship between the LED 17 and the optical member 15 in the Z-axis direction can be maintained constant.

Next, the light reflecting sheet 21 will be described. The light reflecting sheet 21 includes a first light reflecting sheet 22 having a size covering the entire inner surface of the chassis 14 and a second light reflecting sheet 23 having a size covering each LED substrate 30 individually. Both the reflection sheets 22 and 23 are made of a synthetic resin, and the surfaces thereof are white with excellent light reflectivity. Both reflection sheets 22 and 23 are assumed to extend along the bottom plate 14 a (LED substrate 30) in the chassis 14.

As shown in FIG. 6, the first light reflecting sheet 22 is formed with lens insertion holes 22b through which the diffusion lenses 19 arranged in the chassis 14 can be inserted. A plurality of lens insertion holes 22b are arranged in parallel at positions overlapping each LED 17 and each diffusion lens 19 in plan view. The lens insertion hole 22 b has a circular shape in plan view corresponding to the shape of the diffusing lens 19, and the diameter dimension thereof is set to be larger than that of the diffusing lens 19. Thus, when the first light reflecting sheet 22 is laid in the chassis 14, each diffusion lens 19 can be surely inserted into each lens insertion hole 22 b regardless of the dimensional error. The situation where the first light reflection sheet 22 interferes can be suppressed.

As shown in FIG. 3, the first light reflecting sheet 22 covers the area between the adjacent diffusing lenses 19 and the outer peripheral area in the chassis 14, so that light directed to these areas is directed to the optical member 15 side. It can be reflected toward. Further, as shown in FIGS. 4 and 5, the outer peripheral portion of the first light reflecting sheet 22 is inclined with respect to the portion covering the LED substrate 30 and covers the side plate 14 c of the chassis 14. It is arranged with. Then, the outer peripheral end (the outer peripheral side of the inclined portion) of the first light reflecting sheet 22 is placed on the receiving plate 14 d and is sandwiched between the chassis 14 and the optical member 15.

On the other hand, the second light reflection sheet 23 has substantially the same outer shape as the LED substrate 30, that is, a rectangular shape when viewed in a plane. As shown in FIG. 6, the second light reflecting sheet 23 is disposed so as to overlap the front side surface of the LED substrate 30 and is opposed to the diffusing lens 19. That is, the second light reflecting sheet 23 is interposed between the diffusion lens 19 and the LED substrate 30.

Therefore, about the light returned from the diffusion lens 19 side to the LED substrate 30 side and the light entering the space between the diffusion lens 19 and the LED substrate 30 from a space outside the diffusion lens 19 in a plan view, The second light reflecting sheet 23 can reflect the light again to the diffusing lens 19 side. As a result, the light utilization efficiency can be increased, and the luminance can be improved. In other words, sufficient brightness can be obtained even when the number of LEDs 17 is reduced to reduce the cost.

The second light reflecting sheet 23 has a long side dimension substantially the same as that of the LED substrate 30, while a short side dimension is larger than that of the LED substrate 30. Furthermore, the short side dimension of the second light reflecting sheet 23 is larger than the diameter dimension of the lens insertion hole 22b of the diffusing lens 19 and the first light reflecting sheet 22. Thereby, the 2nd light reflection sheet 23 is arranged in the form where it overlaps with lens penetration hole 22b in plane view. In other words, the first light reflecting sheet 22 and the second light reflecting sheet 23 are continuously arranged in the chassis 14 without being interrupted in plan view, and the chassis 14 or the LED substrate 30 is front side from the lens insertion hole 22b. Is hardly exposed. For this reason, the light in the chassis 14 can be efficiently reflected toward the optical member 15, which is extremely suitable for improving the luminance.

Further, as shown in FIG. 6, the second light reflecting sheet 23 includes an LED insertion hole 23 a through which each LED 17 can be inserted, and a leg insertion hole 23 b through which each attachment leg 19 d of each diffusion lens 19 can be inserted. These are formed so as to penetrate each of the positions overlapping with them in a plan view. Furthermore, in the 1st light reflection sheet 22 and the 2nd light reflection sheet 23, the insertion hole 22c and insertion which can insert the support part 20c in the position which overlaps with the support part 20c of the holding member 20 mentioned above by planar view. Each hole 23c is formed.

Next, a configuration for supplying driving power to the LED substrate 30 in the present embodiment will be described. In the present embodiment, each LED 17 is electrically connected to the power supply unit 40 so that driving power can be supplied. More specifically, the power supply unit 40 is electrically connected to the power source P, for example, and has a function of applying a driving voltage to each LED 17. In addition, when using LED as a light source like this embodiment, although the DC / DC (direct current / direct current) converter etc. can be illustrated as the power supply part 40, for example, it is not limited to this, LED17 Any configuration can be used as long as it is capable of supplying driving power.

As shown in FIG. 7, in the present embodiment, as described above, the plurality of LED boards 30 are arranged in parallel along the short side direction (Y-axis direction) of the chassis 14. And among the plurality of LED boards 30 arranged in parallel in the Y-axis direction (parallel direction), in the Y-axis direction, two LED boards 30 arranged adjacent to each other are taken as one set, A drive circuit for the LED 17 is formed for each pair of LED substrates 30 (hereinafter also referred to as an LED substrate group) (details will be described later). In this embodiment, since eight LED boards 30 are arranged in parallel in the Y-axis direction, a total of four sets of LED 17 drive circuits are formed.

In the following description, one of the pair of LED substrates 30 may be referred to as an LED substrate 30A (first light source substrate) and the other as an LED substrate 30B (second light source substrate). Further, the plurality of LEDs 17 mounted on the LED substrate 30A may be referred to as LED 17A (first light source), and the plurality of LEDs 17 mounted on the LED substrate 30B may be referred to as LED 17B (second light source).

As shown in FIG. 7, a conductive path 32 (wiring pattern) made of a metal film such as a copper foil is formed on the surface of each LED substrate 30 via an insulating layer. The conductive path 32 extends along the long side direction (X-axis direction) of the LED substrate 30. The LEDs 17 are arranged along the extending direction of the conductive paths 32, and the anode and cathode terminals of the LEDs 17 and the conductive paths 32 are electrically connected to each other by soldering. Thereby, in LED board 30, each LED17 becomes a structure connected in series, for example (refer FIG. 8). In addition, an insulating layer (not shown) is formed between the conductive path 32 and the LED substrate 30, and the conductive path 32 is electrically insulated from the LED substrate 30. In the following description, the conductive path 32 in the LED substrate 30A is referred to as a first conductive path 32A (first conductive path), and the conductive path 32 in the LED substrate 30B is referred to as a second conductive path 32B (second conductive path). There is.

In the LED boards 30A and 30B, the first conductive path 32A in the X-axis direction (the direction intersecting the parallel direction of the first light source board and the second light source board, the extending direction of the conductive path 32) One end side terminal 33A is provided, and a second end side terminal 33B is provided at one end of the second conductive path 32B. That is, the first one end side terminal 33A and the second one end side terminal 33B are respectively provided at the end portions on the same side in the first conductive paths 32A and 32B in the X-axis direction. Further, the first one end side terminal 33A and the second one end side terminal 33B are arranged at positions adjacent to each other in the Y-axis direction.

The first one end side terminal 33A and the second one end side terminal 33B are electrically connected to each other via the power supply unit 40 and lead wires 36A and 36B (or a flexible board or the like). That is, the power supply unit 40 is electrically connected at one end of the first conductive path 32A and one end of the second conductive path 32B (the end on the same side, the right end in FIG. 7).

In addition, in this embodiment, the electric power supply part 40 is provided separately for every pair of LED board 30A, 30B, and drive control of each LED17 is possible for every pair of LED board 30A, 30B. The plurality of power supply units 40 are mounted on, for example, a power supply board 41 as shown in FIG. As shown in FIG. 4, the power supply board 41 is attached to the back surface of the chassis 14, for example. However, the attachment location of the power supply board 41 is not limited to the back face of the chassis 14 and can be changed as appropriate.

In LED board 30A, 30B, the other end part (end part of the same side) of the 1st conductive path 32A and the 2nd conductive path 32B in a X-axis direction (direction which cross | intersects the parallel direction of a 1st light source board | substrate and a 2nd light source board | substrate) A first other end side terminal 34A and a second other end side terminal 34B are provided at the end opposite to the end of FIG. 7, and the left end in FIG. That is, the first other end side terminal 34A and the second other end side terminal 34B are provided at the end portions on the same side in the first conductive paths 32A and 32B, respectively. The first other end side terminal 34A and the second other end side terminal 34B are arranged at positions adjacent to each other in the Y-axis direction.

As shown in FIG. 7, a connector member 35 having a longitudinal shape in plan view is connected to the first other end side terminal 34A and the second other end side terminal 34B (the connector member 35 is omitted in FIG. 3). ). Thereby, the other end portions of the first conductive path 32 </ b> A and the second conductive path 32 </ b> B are electrically connected via the connector member 35. In addition, as each terminal 33 and 34 mentioned above, a connector is used, for example, and the 1st other end side terminal 34A and the 2nd other end side terminal 34B are set as the structure which can be fitted with the connector member 35, respectively.

As shown in FIG. 8, the power supply unit 40 is connected to, for example, the cathode side of the LED 17A and connected to the anode side of the LED 17B. The connector member 35 is connected to, for example, the anode side of the LED 17A and connected to the cathode side of the LED 17A. A forward current can be supplied from the power supply unit 40 to each of the LEDs 17A and 17B.

With the above configuration, in the pair of LED substrates 30A and 30B, the power supply unit 40, the first conductive path 32A (the plurality of LEDs 17A), the connector member 35, and the second conductive path 32B (the plurality of LEDs 17B) provide a drive circuit for the LED 17. By controlling the driving power from the power supply unit 40 formed, it is possible to collectively control driving such as turning on / off of the LED 17A and LED 17B.

In the present embodiment, a total of four pairs of LED boards 30A and 30B (LED board group) are arranged, and the power supply unit 40 is provided at the end on the same side of each conductive path 32 of the LED board group. The connector member 35 is connected to the end portion on the opposite side to the side to which the power supply unit 40 is electrically connected.

As described above, in the present embodiment, the LED substrate 30A on which a plurality of LEDs 17A are mounted, the LED substrate 30B on which a plurality of LEDs 17B are mounted and arranged in parallel with the LED substrate 30A, and the LED substrate A first conductive path 32A formed on 30A and electrically connected to each of the LEDs 17A; a second conductive path 32B formed on the LED substrate 30B and electrically connected to each of the LEDs 17B; and the LEDs 17A and 17B. A power supply unit 40 capable of supplying drive power; and a connector member 35 that electrically connects the first conductive path 32A and the second conductive path 32B. The power supply unit 40 is arranged in the X-axis direction (LED substrate). 30A and the one end part (end part of the same side) of the 1st conductive path 32A and the 2nd conductive path 32B in the direction which cross | intersects the parallel direction of LED board 30B) The connector member 35 is configured to electrically connect the other end portions of the first conductive path 32A and the second conductive path 32B (the end portion on the opposite side to the end portion on the same side). It is characterized by being.

According to the present embodiment, the power supply unit 40 is connected to one end (the right end in FIG. 7) of the first conductive path 32A and the second conductive path 32B, and the first conductive path 32A and the second conductive path 32B are connected by the connector member 35. The other end portions (the left end portion in FIG. 7) of the second conductive path 32B are connected to each other. Thus, a circuit is formed by the power supply unit 40, the first conductive path 32A (the plurality of LEDs 17A), the connector member 35, and the second conductive path 32B (the plurality of LEDs 17B), and the LED 17A is driven by the driving power from the power supply unit 40. And the LED 17B can be driven.

In other words, the other end portion (first other end side terminal 34A) of the first conductive path 32A and the power supply unit 40 are electrically connected via the second conductive path 32B. Further, the other end portion (second other end side terminal 34B) of the second conductive path 32B and the power supply unit 40 are electrically connected through the first conductive path 32A. For this reason, there is no need to provide a conductive member (such as a conductive path) for electrically connecting the other end of the first conductive path 32A (or the other end of the second conductive path 32B) and the power supply unit 40. The cost related to the conductive member can be reduced.

Conventionally, in the case of a configuration in which one LED driving circuit is formed on one LED substrate 30 as in the backlight device 2 shown in FIG. 9, the other end portion (first other end side terminal) of the conductive path 32. In order to electrically connect 34A) to the power supply unit 40, for example, it is necessary to form another conductive path 32D. The connector member 5 (so-called return connector) is configured to connect the other end portion (terminal 4A) of the conductive path 32D and the first other end side terminal 34A.

In this regard, as in this embodiment, if the drive circuit of the LED 17 is formed with a pair of two LED boards 30A and 30B arranged in parallel, the conductive path 32D can be compared with the configuration of FIG. It is not necessary to provide a member, which is preferable. Moreover, since it is not necessary to provide a conductive member like the conductive path 32D, the size (width) of the LED substrate 30 can be reduced.

In the present embodiment, the power supply unit 40 is connected to each conductive path 32 at one end of the first conductive path 32A and the second conductive path 32B (that is, the end on the same side of both the conductive paths 32A and 32B). Electrically connected. In this way, for example, compared to a configuration in which the power supply unit 40 is electrically connected to one end portion of the first conductive path 32A and the other end portion of the second conductive path 32B, the conductive member necessary for the connection. (In this embodiment, the length of the lead wires 36A and 36B) can be reduced.

The connector member 35 is connected to one end of the first conductive path 32A and the second conductive path 32B (that is, the end on the same side of both the conductive paths 32A and 32B). In this way, for example, the connector member 35 can be made smaller than the configuration in which the connector member 35 connects the other end of the first conductive path 32A and the one end of the second conductive path 32B. .

In the above configuration, the LED board 30A and the LED board 30B are included, and the LED board 30 includes a plurality of LED boards 30 arranged in parallel along the Y-axis direction (parallel direction of the LED boards 30). The LED board 30A and the LED board 30B are arranged adjacent to each other in the Y-axis direction.

With such a configuration, the first conductive path 32A and the second conductive path 32B can be arranged closer to each other in the Y-axis direction. As a result, the length in the Y-axis direction of the connector member 35 that connects the first conductive path 32A and the second conductive path 32B can be further reduced, and the cost associated with the connector member 35 can be reduced.

In addition, in the LED board 30A, a first end terminal 33A is provided at one end of the first conductive path 32A, and a first other end terminal 34A is provided at the other end, and the second conductive path 32B is provided in the LED board 30B. A second end-side terminal 33B is provided at one end of the second end, and a second end-side terminal 34B is provided at the other end. The first end-side terminal 33A and the second end-side terminal 33B are electrically connected to the power supply unit 40. The first other end side terminal 34 </ b> A and the second other end side terminal 34 </ b> B are electrically connected to the connector member 35.

By connecting the first other end side terminal 34A and the second other end side terminal 34B to the connector member 35, the first conductive path 32A and the second conductive path 32B can be electrically connected. It can be done easily.

Also, the first other end side terminal 34A and the second other end side terminal 34B can be arranged at positions adjacent to each other in the Y-axis direction.

Thus, by arranging the first other end side terminal 34A and the second other end side terminal 34B at adjacent positions, the both terminals 34A, 34B can be brought as close as possible. Thereby, the length of the connector member 35 which connects both terminals can be made smaller, and the cost concerning the connector member 35 can be reduced.

The LED substrate 30A and the LED substrate 30B have a longitudinal shape, and the long side directions of the LED substrate 30A and the LED substrate 30B are arranged along a direction intersecting the parallel direction of the LED substrate 30A and the LED substrate 30B. Can be.

The first conductive path 32A extends along the long side direction of the LED substrate 30A, and a plurality of LEDs 17A are arranged along the long side direction of the LED substrate 30A (the extending direction of the LED substrate 30A). The second conductive path 32B extends along the long side direction of the LED substrate 30B, and a plurality of LEDs 17B are arranged along the long side direction of the LED substrate 30B (extending direction of the LED substrate 30B). Can be.

Also, the LED 17 is used as the first light source and the second light source. In this way, the life of the light source can be extended and the power consumption can be reduced.

<Embodiment 2>
Next, Embodiment 2 of the present invention will be described with reference to FIG. The same parts as those in the above embodiment are denoted by the same reference numerals, and redundant description is omitted. As shown in FIG. 10, in the backlight device 112 of the present embodiment, for example, in the uppermost LED board group in FIG. 10, the power supply unit 40 is connected to one end side (right side in FIG. 10) of the conductive path 32. ing. On the other hand, in the second LED board group from the top, the side of the conductive path 32 where the power supply unit 40 and the connector member 35 are connected is replaced with the uppermost LED board group. That is, in the second LED board group from the top, the power supply unit 40 is connected on the left side of the conductive path 32 in FIG. As in the present embodiment, for each LED board group (a pair of LED boards 30A and 30B), the side to which the power supply unit 40 (or connector member 35) of the conductive path 32 is connected may be different.

<Embodiment 3>
Next, Embodiment 3 of the present invention will be described with reference to FIG. The same parts as those in the above embodiment are denoted by the same reference numerals, and redundant description is omitted. In the above embodiment, each of the first light source substrate and the second light source substrate is composed of only one LED substrate 30. On the other hand, as shown in FIG. 11, the backlight device 212 of the present embodiment includes a plurality of LED substrates 230 in which a first light source substrate and a second light source substrate are arranged in the X-axis direction. . In FIG. 11, the LED substrate 230 that constitutes the first light source substrate is referred to as an LED substrate 230A, and the LED substrate 230 that constitutes the second light source substrate is referred to as an LED substrate 230B.

In addition, a connector member 235 is provided between the LED substrates 230 adjacent in the X-axis direction, and each conductive path 232 adjacent in the X-axis direction is electrically connected by the connector member 235. Yes. If the configuration is such that a plurality of LED substrates 230 are arranged in the X-axis direction as in the present embodiment, each LED 17 corresponds to the chassis 14 of various sizes by changing the number of LED substrates 230. Can be arranged two-dimensionally.

<Embodiment 4>
Next, a fourth embodiment of the present invention will be described with reference to FIG. The same parts as those in the above embodiment are denoted by the same reference numerals, and redundant description is omitted. In the backlight device 312 of this embodiment, as shown in FIG. 12, an LED board group mainly composed of an LED board 330A (first light source board), an LED board 330B (second light source board), and a connector member 35. Are arranged in the X-axis direction and the Y-axis direction in the chassis 314, respectively. In both LED board groups arranged in the X-axis direction, the connector members 35 are arranged adjacent to each other on the center side of the chassis 314 in the X-axis direction.

<Embodiment 5>
Next, Embodiment 5 of the present invention will be described with reference to FIG. The same parts as those in the above embodiment are denoted by the same reference numerals, and redundant description is omitted. In the backlight device 412 of the present embodiment, as shown in FIG. 13, for example, a plurality (four in this embodiment) of LED substrates 430 are arranged on the chassis 414 in the Y-axis direction.

Of the plurality of LED substrates 430, the LED substrate 430A, 430D (first light source substrate) on the end side in the Y-axis direction (parallel direction) is one end side on the one end side (right side in FIG. 13) in the X-axis direction. The terminal 33 is connected to the power supply unit 40.

The LED substrate 430A is connected to the other end side of the adjacent LED substrate 430B (second light source substrate) via the connector member 35 at the other end side terminal 34 on the other end side (left side in FIG. 13) in the X-axis direction. The terminal 34 is electrically connected. Further, the LED substrate 430D has the other end side of the adjacent LED substrate 430C (second light source substrate) via the connector member 35 at the other end side terminal 34 on the other end side (left side in FIG. 13) in the X-axis direction. The terminal 34 is electrically connected.

Furthermore, the LED substrate 430B and the LED substrate 430C are electrically connected to each other on one end side in the X-axis direction via each one end side terminal 33 and the connector member 35. Note that the LED substrates are electrically connected here means that the conductive paths 32 and the LEDs 17 provided on the LED substrates are electrically connected.

With such a configuration, driving power can be supplied from the power supply unit 40 to each LED 17 mounted on each LED substrate 430, and the power supply unit 40 and each LED substrate 430 are individually connected. Compared with the structure to perform, the electrically-conductive member which concerns on the connection of the electric power supply part 40 and each LED board 430 can be reduced.

And in this embodiment, LED board 430A, 430D (end part side light source board) distribute | arranged to the edge part side in a Y-axis direction (parallel direction) among several LED board 430 (several light source board | substrates). The brightness of the mounted LEDs 17A and 17D (light source) is set to be lower than the brightness of the LEDs 17B and 17C mounted on the LED boards 430B and 430C (center side light source board) disposed on the center side. .

With such a configuration, when the backlight device 412 is used for a display device, the luminance of the peripheral edge portion of the display surface can be made lower than the luminance of the central portion, and there is no sense of incongruity for humans. It is possible to display images that are less fatigued.

In order to set the luminance of the LEDs 17A and 17D to be lower than that of the LEDs 17B and 17C, for example, the LEDs 17B and 17C may be LEDs having a lower luminance rank than the LEDs used for the LEDs 17A and 17D. Good.

Further, if the luminance of the LEDs 17A and 17D is lower than that of the LEDs 17B and 17C, for example, it is easy to reduce power consumption as compared with a configuration using only the LEDs 17B and 17C. is there.

<Embodiment 6>
Next, Embodiment 6 of the present invention will be described with reference to FIG. The same parts as those in the above embodiment are denoted by the same reference numerals, and redundant description is omitted. In the backlight device 512 of the present embodiment, as shown in FIG. 14, for example, a plurality (four in this embodiment) of LED substrates 430 are arranged on the chassis 514 in the Y-axis direction.

Among the plurality of LED substrates 430, the LED substrates 430B and 430C (first light source substrate) on the center side in the Y-axis direction supply power at one end side terminal 33 on one end side (right side in FIG. 14) in the X-axis direction. Are connected to each other. The LED board 430B is connected to the other end side of the adjacent LED board 430A (second light source board) via the connector member 35 at the other end side terminal 34 on the other end side (left side in FIG. 14) in the X-axis direction. The terminal 34 is electrically connected. Further, the LED substrate 430C is connected to the other end side of the adjacent LED substrate 430D (second light source substrate) via the connector member 35 at the other end side terminal 34 on the other end side (left side in FIG. 13) in the X-axis direction. The terminal 34 is electrically connected.

Furthermore, the LED board 430A and the LED board 430D are electrically connected via one end side terminals 533 and a connector member 535 on one end side in the X-axis direction. With such a configuration, it is possible to supply driving power from the power supply unit 40 to the LEDs 17 mounted on each LED board 430, and connect the power supply unit 40 and each LED board 430 individually. Compared with the configuration, the number of conductive members related to the connection between the power supply unit 40 and each LED substrate 430 can be reduced.

<Embodiment 7>
Next, Embodiment 7 of the present invention will be described with reference to FIG. The same parts as those in the above embodiment are denoted by the same reference numerals, and redundant description is omitted. In the backlight device 612 of the present embodiment, as shown in FIG. 15, a plurality of LED boards 30A and 30B (LED board group) connected by the connector member 35 are provided on the chassis 614 along the Y-axis direction. It is arranged.

Further, the LED board groups 30A and 30B connected to the power supply unit 40 on one end side (right side in FIG. 15) in the one side direction of the chassis 614 and the connector member 35 on the other end side (left side in FIG. 15); The power supply unit 40 is arranged on the other end side in the one side direction (left side in FIG. 15), and the LED board groups 30A and 30B connected to the connector member 35 on the one end side (right side in FIG. 15) are alternately arranged in the Y-axis direction. It becomes the composition which is done.

<Eighth embodiment>
Next, an eighth embodiment of the present invention will be described with reference to FIG. The same parts as those in the above embodiment are denoted by the same reference numerals, and redundant description is omitted. In the backlight device 712 of the present embodiment, as shown in FIG. 16, odd-numbered (three in FIG. 16) LED substrates 730 </ b> A, 730 </ b> B, and 730 </ b> C are arranged on the chassis 714.

The LED boards 730A, 730B, and 730C are connected to the power supply unit 40 via one end side terminals 33 on one end side in the X-axis direction. On the other hand, on the other end side in the X-axis direction of each LED board 730A, 730B, 730C, the conductive path 32 (and consequently, each LED board 730A, 730B, 730C via the other end side terminal 34 and the connector member 735). Each of the LEDs 17) is electrically connected.

As described above, when the plurality of LED boards 730 are collectively connected by the connector member 735, the number of times the connector member 735 is attached can be reduced, and workability can be improved. In the configuration of the present embodiment, for example, the LED substrates 730A and 730B correspond to the first light source substrate and the LED substrate 730C corresponds to the second light source substrate.

<Ninth Embodiment>
Next, Embodiment 9 of the present invention will be described with reference to FIG. The same parts as those in the above embodiment are denoted by the same reference numerals, and redundant description is omitted. In the backlight device 812 of this embodiment, as shown in FIG. 17, an even number (four in FIG. 17) of LED boards 830 A, 830 B, 830 C, and 830 D are arranged on the chassis 814 in the Y-axis direction. .

The LED boards 830A, 830B, 830C, and 830D are connected to the power supply unit 40 via one end side terminals 33 on one end side in the X-axis direction. On the other hand, on the other end side in the X-axis direction of each of the LED boards 830A to 830D, the conductive path 32 (and thus the LED 17) of each of the LED boards 830A to 830D is electrically connected via the connector member 835. It has become. Thus, if it is set as the structure which connects the some LED board 830 by the connector member 835 collectively, the frequency | count of attaching the connector member 835 can be reduced, and workability | operativity can be improved. In the present embodiment, for example, the LED substrates 830A and 830D correspond to the first light source substrate, and the LED substrates 830B and 830C correspond to the second light source substrate.

<Embodiment 10>
Next, Embodiment 10 of the present invention will be described with reference to FIG. The same parts as those in the above embodiment are denoted by the same reference numerals, and redundant description is omitted. In the backlight device 912 of the present embodiment, as shown in FIG. 18, in addition to the configuration in which the drive circuit of the LED 17 is formed by the power supply unit 40 and the LED substrates 30A and 30B, the power supply unit 40, A drive circuit for the LED 17 is formed by a single LED substrate 930.

More specifically, in the LED board 930 disposed in the chassis 914, a plurality of LEDs 17 are connected to each other by the conductive path 32, and one end portion of the conductive path 32 is supplied with power via the one end side terminal 933. The unit 40 is connected. On the other hand, the other end of the conductive path 32 is connected to the conductive path 932 via a connector member 935 (so-called return connector). The conductive path 932 is connected to the power supply unit 40 through the one end side terminal 933. That is, the LED board 930 that does not include the connector member 35 may be arranged in the chassis as in the present embodiment.

<Other embodiments>
As mentioned above, although embodiment of this invention was shown, this invention is not limited to embodiment described with the said description and drawing, For example, the following embodiment is also contained in the technical scope of this invention.

(1) In the above embodiment, the configuration in which each LED 17 is connected in series via the conductive path 32 is exemplified, but the present invention is not limited to this. In short, any configuration may be used as long as driving power can be supplied from the power supply unit 40 to each LED 17 via the conductive path 32.

(2) The shape of the LED substrate 30 is not limited to the longitudinal shape exemplified in the above embodiment, and can be changed as appropriate.

(3) In the above-described embodiment, the configuration includes the diffusion lens 19, but the configuration may not include the diffusion lens 19. When the diffusion lens 19 is not provided, the size of the reflection sheet can be set smaller than the outer shape of the diffusion lens 19.

(4) The shape, material, and the like of the diffusion lens 19 are not limited to those of the above embodiment, and may have a function of diffusing light.

(5) In the above embodiment, the LED 17 including the blue light emitting LED chip and the phosphor is exemplified, but the present invention is not limited to this. For example, the LED 17 may be configured to emit white light by including an ultraviolet light emitting chip that emits ultraviolet light and a phosphor that emits light when excited by the ultraviolet light. Examples of such phosphors include those having a phosphor having an emission peak in a blue region, a phosphor having an emission peak in a green region, and a phosphor having an emission peak in a red region. be able to. Further, the LED 17 may be configured to include three types of LED chips that emit R (red), G (green), and B (blue) in a single color. Further, the LED 17 may be configured by combining three types of LEDs that emit R (red), G (green), and B (blue) in a single color. The LED 17 may emit white light by combining a blue light emitting chip, a red light emitting chip, and a phosphor having a light emission peak in a green region.

(6) The configurations of the diffusion plate and the optical sheet may be configurations other than the above-described embodiment, and can be changed as appropriate. Specifically, the number of diffusion plates 15a and the number and type of optical sheets 15b can be changed as appropriate. It is also possible to use a plurality of optical sheets 15b of the same type.

(7) The number of LEDs 17 mounted on the LED substrate 30 is not limited to the number of mountings exemplified in the above embodiment, and can be changed as appropriate.

(8) In the first and second embodiments described above, the configuration in which a plurality of LED substrates 30 are arranged in the short side direction in the chassis 14 is exemplified, but a plurality of LED substrates 30 are arranged in the long side direction. Also good.

(9) In the above-described eighth to ninth embodiments, the configuration is such that three or four LED boards are collectively connected by one connector member 735, 835, but is not limited thereto. The number of LED substrates to be connected by one connector member can be changed as appropriate, and five or more LED substrates may be connected together.

(10) In each of the above-described embodiments, the configuration using the LED 17 as the light source is exemplified, but a configuration using a light source other than the LED may be used.

(11) In each of the above-described embodiments, the configuration in which the chassis 14 is arranged with the short side direction aligned with the vertical direction is exemplified, but the chassis 14 is arranged with the long side direction aligned with the vertical direction. It may be a configuration.

(12) In each of the embodiments described above, a TFT is used as a switching element of a liquid crystal display device. However, the present invention can also be applied to a liquid crystal display device using a switching element other than TFT (for example, a thin film diode (TFD)). In addition to the liquid crystal display device for display, the present invention can also be applied to a liquid crystal display device for monochrome display.

(13) In each of the embodiments described above, the liquid crystal display device using the liquid crystal panel as the display element has been exemplified, but the present invention is also applicable to a display device using another type of display element.

(14) In each of the above-described embodiments, the television receiver provided with the tuner is exemplified. However, the present invention can be applied to a display device that does not include the tuner.

DESCRIPTION OF SYMBOLS 10 ... Liquid crystal display device (display device), 11 ... Liquid crystal panel (display panel), 12, 112, 212, 312, 412, 512, 612, 712, 812, 912 ... Backlight device (illumination device), 17A ... LED (First light source, light emitting diode), 17B ... LED (second light source, light emitting diode), 30A, 230A, 330A, 730A, 730B, 830A, 830D ... LED substrate (first light source substrate), 30B, 230B, 330B, 730C, 830B, 830C ... LED substrate (second light source substrate), 32A ... first conductive path, 32B ... second conductive path, 33A ... first end side terminal, 33B ... second end side terminal, 34A ... first other End side terminal, 34B ... second other end side terminal, 35 ... connector member, 40 ... power supply unit, 430A, 430D ... LED substrate (end side light source substrate), 30B, 430C ... LED substrate (center side light source substrate), TV ... television receiver apparatus

Claims (17)

1. A first light source substrate on which a plurality of first light sources are mounted;
   A plurality of second light sources, and a second light source substrate arranged in parallel with the first light source substrate;
   A first conductive path formed on the first light source substrate and electrically connected to each of the first light sources;
   A second conductive path formed on the second light source substrate and electrically connected to each of the second light sources;
   A power supply unit capable of supplying driving power to the first light source and the second light source;
   A connector member for electrically connecting the first conductive path and the second conductive path;
   The power supply unit is electrically connected to each other at an end portion on the same side of the first conductive path and the second conductive path in a direction crossing a parallel direction of the first light source board and the second light source board. ,
   The said connector member is the structure which electrically connects the edge parts on the opposite side to the edge part of the said same side of the said 1st conductive path and the said 2nd conductive path.
2. A plurality of light source substrates including the first light source substrate and the second light source substrate and arranged in parallel along the parallel direction;
   2. The lighting device according to claim 1, wherein among the plurality of light source substrates, the first light source substrate and the second light source substrate are arranged adjacent to each other in the parallel direction.
3. A plurality of light source substrates including the first light source substrate and the second light source substrate and arranged in parallel along the parallel direction;
   Each of the plurality of light source substrates includes a light source,
   Among the plurality of light source substrates, the luminance of the light source provided in the end side light source substrate disposed on the end side in the parallel direction is:
   2. The illumination according to claim 1, wherein among the plurality of light source substrates, the illumination is set at a luminance lower than a luminance of a light source provided in a central portion side light source substrate arranged on a central portion side in the parallel direction. apparatus.
4. In the first light source substrate, a first one end side terminal is provided at the end on the same side of the first conductive path, and a first other end side terminal is provided at the opposite end.
   In the second light source substrate, a second one end side terminal is provided at the end of the second conductive path on the same side, and a second other end side terminal is provided at the opposite end.
   The first one end side terminal and the second one end side terminal are electrically connected to the power supply unit,
   4. The lighting device according to claim 1, wherein the first other end side terminal and the second other end side terminal are electrically connected to the connector member. 5.
5. The lighting device according to claim 4, wherein the first other end side terminal and the second other end side terminal are arranged at positions adjacent to each other in the parallel direction.
6. The first light source substrate and the second light source substrate have a longitudinal shape,
   6. The long side direction of the first light source substrate and the second light source substrate is arranged along a direction intersecting the parallel direction. 6. Lighting equipment.
7. The first conductive path extends along a long side direction of the first light source substrate,
   A plurality of the first light sources are arranged along the extending direction of the first conductive path,
   The second conductive path extends along the long side direction of the second light source substrate,
   The lighting device according to claim 6, wherein a plurality of the second light sources are arranged along an extending direction of the second conductive path.
8. The lighting device according to any one of claims 1 to 7, wherein the first light source and the second light source are light emitting diodes.
9. The illumination device according to claim 8, wherein the light emitting diode is a light emitting diode that emits white light by including a blue light emitting chip and a phosphor having a light emission peak in a yellow region.
10. The light-emitting diode is a light-emitting diode that emits white light by including a blue light-emitting chip, a phosphor having a light emission peak in a green region, and a phosphor having a light emission peak in a red region. Item 9. The lighting device according to Item 8.
11. The illumination device according to claim 8, wherein the light emitting diode is a light emitting diode that emits white light by including a blue light emitting chip, a red light emitting chip, and a phosphor having a light emission peak in a green region. .
12. The lighting device according to claim 8, wherein the light emitting diode is a light emitting diode that emits white light by including a blue light emitting chip, a red light emitting chip, and a green light emitting chip.
13. The lighting device according to claim 8, wherein the light-emitting diode is a light-emitting diode that emits white light by including an ultraviolet light-emitting chip and a phosphor.
14. The light emitting diode includes an ultraviolet light emitting chip, a phosphor having a light emission peak in a blue region, a phosphor having a light emission peak in a green region, and a phosphor having a light emission peak in a red region. The illumination device according to claim 8, wherein the illumination device emits white light.
15. The lighting device according to any one of claims 1 to 14,
    And a display panel that performs display using light from the lighting device.
16. The display device according to claim 15, wherein the display panel is a liquid crystal panel using liquid crystal.
17. A television receiver comprising the display device according to claim 15 or 16.

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