WO2013065539A1 - Illumination device, display device, and television receiving device - Google Patents

Abstract

This backlight device (12) is provided: with an LED (24); a chassis (22) having a side plate (22b), and a bottom plate (22a) with the LED (24) arranged on the plate surface; a reflective sheet (29) which reflects light from the LED (24) and which has a bridge section (29b) arranged spanning at least from the bottom plate (22a) to the side plate (22b) of the chassis (22); wires (31, 32) connected to the LED (24) which are routed in a space (S) enclosed by the bottom plate (22a), the side plate (22b) and the bridge section (29b); and a ring-form harness holder (50) which holds the wires (31, 32) and which has a bottom plate contact section (51) contacting the bottom plate (22a), a side plate contact section (52) contacting the side plate (22b), and a cover section (53) connected to the bottom plate contact section (51) and the side plate contact section (52), covering the wires (31, 32), and shaped to follow the bridge section (29b).

Description

Lighting device, display device, and television receiver

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

In recent years, image display devices such as television receivers are shifting from conventional cathode ray tubes to thin display devices to which thin display elements such as liquid crystal panels and plasma display panels are applied. When a liquid crystal panel is used as the display element, the liquid crystal panel does not emit light, and thus a backlight device is separately required as a lighting device.

Patent Document 1 discloses a wiring board (LED board), a number of light emitting diodes (LEDs) mounted on the wiring board, and the vicinity of one side edge in the width direction on both sides in the longitudinal direction of the wiring board. There is disclosed a backlight device including a light emitting block body that has a first connector and a second connector that are mounted at a position and is attached to a back panel (chassis). In the backlight device, lead wires (wirings) are drawn out from the first connector and the second connector, and are routed between two adjacent wiring boards in the center of the back panel. A clamper (harness holder) is provided as a guide means for the lead wire, and the lead wire is held on the back panel by the clamper. In addition, a reflection sheet is laid on the light emission side of the wiring board on the back panel.

JP 2005-353498 A

(Problems to be solved by the invention)
However, as in the invention disclosed in Patent Document 1, when the wiring is routed in the central portion of the chassis, a space for routing the wiring is provided between the chassis and the reflection sheet in the central portion of the chassis. It is necessary to secure the wiring, and it is difficult to route the wiring. In particular, as the backlight device becomes thinner in recent years, the distance between the chassis and the reflection sheet tends to be smaller, and it is increasingly difficult to secure a wiring routing space in the center of the chassis.

In order to avoid the above problem, it is conceivable to route the wiring to the end of the chassis instead of the center of the chassis. Here, as a configuration of the backlight device, a side plate rising from the bottom plate of the chassis is provided at the end portion of the chassis, and light from the light source toward the end portion is reflected on the light emission side to the bottom plate and the side plate. A configuration in which a reflective sheet is arranged across the board is conceivable. In the backlight device having such a configuration, a space for wiring can be secured in a space surrounded by the bottom plate, the side plate, and the reflection sheet of the chassis.

By the way, in the configuration in which the reflection sheet is arranged across the bottom plate and the side plate, the reflection sheet may be bent toward the chassis, and there is a possibility that luminance unevenness may occur in the backlight device due to the bending.

The present invention has been completed based on the above-described circumstances, and an object thereof is to provide an illumination device that is less likely to cause display unevenness.

(Means for solving the problem)
The illumination device of the present invention includes a light source, a chassis having a bottom plate on which the light source is disposed, a side plate rising from the bottom plate to the light source side, and a reflection sheet that reflects light from the light source. A wiring sheet connected to the light source and a reflection sheet having at least a bridge portion extending from the bottom plate to the side plate of the chassis, and surrounded by the bottom plate, the side plate, and the bridge portion. A wiring that is routed in the space, a ring-shaped harness holder that holds the wiring, a bottom plate contact portion that contacts the bottom plate, a side plate contact portion that contacts the side plate, and the bottom plate contact And a harness holder that is connected to the side plate abutting portion, covers the wiring, and has a cover portion that has a shape that follows the bridge portion.

According to the above lighting device, since the harness holder having the cover portion that is connected to the bottom plate contact portion and the side plate contact portion and has a shape that follows the bridge portion is provided, the bridge portion of the reflection sheet is attached from the chassis side to the harness holder. Can be supported. For this reason, it can suppress that a bridge part deform | transforms and can suppress the display nonuniformity resulting from a deformation | transformation of a reflective sheet.

The cover portion has a support surface extending along the bridge portion from the bottom plate side end portion of the bridge portion to the side plate side end portion, and the support surface hits the bridge portion. It may be said.

According to the above configuration, since the support surface supports the bridge portion in a state where the support surface touches the bridge portion from the bottom plate side end portion of the bridge portion to the side plate side end portion, the bridge portion is more deformed. It can suppress more suitably.

The harness holder may be such that the bottom plate contact portion, the side plate contact portion, and the cover portion form a triangular shape in sectional view.

According to the above configuration, it is possible to secure a sufficient space for wiring in a space surrounded by a bottom plate, a side plate, and a bridge portion that are generally triangular in sectional view, and bind a plurality of wires. Can do.

The wiring may be routed along the side plate, and the plurality of harness holders may be disposed at a plurality of locations along the side plate.

According to the above configuration, since the harness holder having the cover portion is arranged at a plurality of locations along the side plate, the bridge portion can be supported at the plurality of locations, and the bridge portion is more deformed. It can suppress more suitably.

One end of the cover portion is swingably coupled to either the bottom plate contact portion or the side plate contact portion, and the other end portion swings in the ring-shaped closing direction, The wiring may be covered.

According to the above configuration, when routing the wiring, the wiring is stored in the harness holder with the cover portion opened, and the wiring is held with the cover portion closed after routing the wiring. The workability of wiring can be excellent.

The cover portion is configured such that the other end portion is detachably engaged with the other bottom plate contact portion or the side plate contact portion to which the one end portion is not connected, and is closed in the ring shape. It may be said.

According to the above configuration, the cover portion can be easily opened and closed, and it is excellent in workability of wiring accommodation work, and the holding state of the wiring is released without removing the harness holder in repair or the like. After that, it is easy to set the wiring again in the holding state.

A light source board on which the light source is mounted; and a plurality of the light source boards are arranged on the bottom plate of the chassis, and a plurality of the wirings are connected to each of the plurality of light source boards. The harness holder may bind the plurality of the wires.

According to the above configuration, even in a configuration in which a plurality of light source substrates are arranged, a plurality of wires can be wired while being bundled, and the wiring is easily arranged and held.

The light source substrate may be connected to the wiring at a portion disposed in a space surrounded by the bottom plate, the side plate, and the bridge portion.

According to the above configuration, the wiring and the light source board are connected in the space surrounded by the bottom plate, the side plate, and the bridge portion, and the wiring is directly routed in the space surrounded by the bottom plate, the side plate, and the bridge portion. it can. For this reason, it is not necessary to route the wiring to other positions, and the wiring routing route can be shortened.

The wiring includes an anode side wiring electrically connected to the anode side of the light source, and a cathode side wiring electrically connected to the cathode side of the light source, and the light source substrate includes the anode side wiring. The wiring and the cathode side wiring may be connected to each other.

According to the above configuration, the number of wirings is smaller than a configuration in which a plurality of light source substrates are connected to each other through a connector or the like, and only one of the anode side wiring and the cathode side wiring is connected to one light source substrate. Although it increases, the configuration related to the connector or the like can be abolished. Even if the number of wires increases, the harness holder having the cover portion is provided, so that there is no possibility that the plurality of wires press the bridge portion and the bridge portion is deformed.

The reflection sheet may be disposed along the bottom plate and may have a bottom portion that covers the light source substrate, and an opening that exposes the light source may be provided in the bottom portion.

According to the above configuration, the light source board and the bottom plate of the chassis can be covered with the bottom of the reflection sheet, and the light directed to the light source board and the chassis can be reflected at the light output side at the bottom to increase the luminance of the lighting device. .

The reflection sheet may be formed by integrally forming the bridge portion with the bottom portion.

According to the above configuration, there is no gap between the bottom portion and the bridge portion, a situation where the gap light enters can be avoided, and the luminance of the lighting device can be increased.

Next, in order to solve the above problem, a display device of the present invention includes the above-described illumination device and a display panel that performs display using light from the illumination device.

According to such a display device, the illumination device that supplies light to the display panel is less likely to cause display unevenness, and high display quality can be obtained.

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.

(The invention's effect)
ADVANTAGE OF THE INVENTION According to this invention, the illuminating device which does not produce display nonuniformity easily can be provided.

1 is an exploded perspective view showing a schematic configuration of a television receiver according to Embodiment 1 of the present invention. Exploded perspective view showing schematic configuration of liquid crystal display device The top view which shows arrangement | positioning structure, such as a diffuser lens, LED board, a holding member, and a reflective sheet, in the chassis which comprises a backlight apparatus. Sectional drawing which shows the cross-sectional structure along the short side direction (iv-iv line of FIG. 3) of a liquid crystal display device Sectional drawing which shows the cross-sectional structure along the long side direction (vv line of FIG. 3) of a liquid crystal display device The top view which shows arrangement | positioning structure, such as an LED board in a chassis which comprises a backlight apparatus, each wiring, and a harness holder Enlarged sectional view of the end of the liquid crystal display device The perspective view which shows the state which the harness holder opened Block diagram showing the electrical configuration of the power supply circuit of the LED substrate The expanded sectional view of the edge part in the liquid crystal display device which concerns on Embodiment 2 of this invention The top view which shows arrangement structure, such as a LED board in the chassis which concerns on Embodiment 3 of this invention, each wiring, and a harness holder. The expanded sectional view of the edge part in the liquid crystal display device which concerns on Embodiment 4 of this invention The expanded sectional view of the edge part in the liquid crystal display device which concerns on Embodiment 5 of this invention

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, the liquid crystal display device 10 is illustrated. A part of each drawing shows an X-axis, a Y-axis, and a Z-axis, and the directions of the axes are drawn in common directions in the drawings. Moreover, let the upper side shown in FIG.4 and FIG.5 be a front side, and let the lower side of the figure be a back side.

(TV receiver)
As shown in FIG. 1, the television receiver TV according to the present embodiment includes a liquid crystal display device 10 that is a display device, front and back cabinets Ca and Cb that are accommodated so as to sandwich the liquid crystal display device 10, and power supply. Power supply circuit board P, a tuner (receiving unit) T capable of receiving a TV image signal, an image conversion circuit board VC for converting the TV image signal output from the tuner T into an image signal for the liquid crystal display device 10 And a stand S. The liquid crystal display device 10 has a horizontally long (longitudinal) rectangular shape (rectangular shape) as a whole, the long side direction is the horizontal direction (X-axis direction), and the short side direction is the vertical direction (Y-axis direction, vertical direction). They are housed in a state of almost matching each other. 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 (illumination device) 12 that is an external light source, which are integrated by a frame-like bezel 13 or the like. Is supposed to be retained.

(LCD panel)
As shown in FIG. 2, the liquid crystal panel 11 has a horizontally long rectangular shape (rectangular shape, longitudinal shape) as a whole, and a pair of glass substrates excellent in translucency are separated from each other by a predetermined gap. In addition, the liquid crystal is sealed between both substrates. One 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. Are provided with a color filter in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement, a counter electrode, and an alignment film.

(Backlight device)
Next, the configuration of the backlight device 12 in the liquid crystal display device 10 will be described. As shown in FIG. 2, the backlight device 12 is arranged so as to cover the chassis 22 having a substantially box shape having an opening on the light emitting surface side (the liquid crystal panel 11 side), and the opening of the chassis 22. And a frame 26 that is disposed along the outer edge of the chassis 22 and holds the outer edge of the group of optical members 23 between the chassis 22 and the chassis 22. Further, in the chassis 22, the LED 24 arranged opposite to the position directly below the optical member 23 (the liquid crystal panel 11), the LED board 25 on which the LED 24 is mounted, and a position corresponding to the LED 24 on the LED board 25. And a diffusing lens 27 attached to the lens. Thus, the backlight device 12 according to the present embodiment is a so-called direct type. In addition, in the chassis 22, a holding member 28 that can hold the LED substrate 25 between the chassis 22 and a reflection sheet 29 that reflects the light in the chassis 22 toward the optical member 23 are provided. . Next, each component of the backlight device 12 will be described.

(Chassis)
The chassis 22 is made of metal, and as shown in FIGS. 3 to 5, as in the liquid crystal panel 11, a bottom plate 22 a having a horizontally long rectangular shape (rectangular shape, rectangular shape) and each side of the bottom plate 22 a (a pair of sides) A side plate 22b that rises from the outer ends of the long side and a pair of short sides toward the front side (light emitting side, the side where the LED 24 described later) is disposed, and a receiving plate that projects outward from the rising end of each side plate 22b 22c, and as a whole, has a shallow substantially box shape (substantially shallow dish shape) opened toward the front side. The long side direction of the chassis 22 coincides with the X-axis direction (horizontal direction), and the short side direction coincides with the Y-axis direction (vertical direction). A frame 26 and an optical member 23 to be described below can be placed on each receiving plate 22c in the chassis 22 from the front side. A frame 26 is screwed to each receiving plate 22c. An attachment hole for attaching the holding member 28 is provided in the bottom plate 22 a of the chassis 22. A plurality of mounting holes are arranged in a distributed manner corresponding to the mounting position of the holding member 28 on the bottom plate 22a.

(Optical member)
As shown in FIG. 2, the optical member 23 has a horizontally long rectangular shape in a plan view, like the liquid crystal panel 11 and the chassis 22. As shown in FIGS. 4 and 5, the optical member 23 is placed on the receiving plate 22c so that the outer edge covers the opening of the chassis 22, and between the liquid crystal panel 11 and the LED 24 (LED substrate 25). It is arranged in the middle. The optical member 23 includes a diffusion plate 23a disposed on the back side (the LED 24 side, opposite to the light emitting side) and an optical sheet 23b disposed on the front side (the liquid crystal panel 11 side, the light emitting side). . The diffusing plate 23a has a structure in which a large number of diffusing particles are dispersed in a substrate made of a substantially transparent resin having a predetermined thickness and has a function of diffusing transmitted light. The optical sheet 23b has a sheet shape that is thinner than the diffusion plate 23a, and two optical sheets 23b are laminated. Specific types of the optical sheet 23b include, for example, a diffusion sheet, a lens sheet, a reflective polarizing sheet, and the like, which can be appropriately selected and used.

(flame)
As shown in FIG. 2, the frame 26 has a frame shape along the outer peripheral edge portions of the liquid crystal panel 11 and the optical member 23. An outer edge portion of the optical member 23 can be sandwiched between the frame 26 and each receiving plate 22c (FIGS. 4 and 5). The frame 26 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 arranged on the front side (FIGS. 4 and 5). ).

(LED)
As shown in FIG. 5, the LED 24 has a configuration in which an LED chip is sealed with a resin material on a substrate portion fixed to the LED substrate 25. The LED chip mounted on the substrate unit has one main emission wavelength, and specifically, one 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, and generally emits white light as a whole. It is said. In addition, as the phosphor, for example, a yellow phosphor that emits yellow light, a green phosphor that emits green light, and a red phosphor that emits red light are used in appropriate combination, or any one of them is used. It can be used alone. The LED 24 is a so-called top surface light emitting type in which a top surface opposite to the mounting surface with respect to the LED substrate 25 is a light emitting surface.

(LED board)
As shown in FIG. 6, the LED substrate 25 has a base material that is horizontally long when viewed in a plane. The long side direction coincides with the X axis direction, and the short side direction coincides with the Y axis direction. In this state, the chassis 22 is accommodated while extending along the bottom plate 22a. Among the plate surfaces of the base material of the LED substrate 25, the LED 24 is surface-mounted on the plate surface facing the front side (the surface facing the optical member 23 side). The mounted LED 24 has a light emitting surface facing the optical member 23 (the liquid crystal panel 11) and an optical axis that coincides with the Z-axis direction, that is, the direction orthogonal to the display surface of the liquid crystal panel 11. A plurality of (for example, 15 in FIG. 3) LEDs 24 are arranged in a straight line along the long side direction (X-axis direction) on the LED substrate 25 and are connected to the LEDs 24 arranged in parallel. A pattern 25c (see FIG. 9) is formed. The arrangement pitch of the LEDs 24 is substantially constant, that is, it can be said that the LEDs 24 are arranged at substantially equal intervals in the X-axis direction.

As shown in FIG. 6, the LED substrate 25 having the above-described configuration is arranged in parallel in the chassis 22 in a state where the long side direction and the short side direction are aligned with each other in the X-axis direction and the Y-axis direction. ing. That is, the LED substrate 25 and the LED 24 mounted thereon are both set in the X-axis direction (the long side direction of the chassis 22 and the LED substrate 25) in the chassis 22 and in the Y-axis direction (the chassis 22 and the LED substrate 25). The short side direction is arranged in a matrix with the column direction (arranged in a matrix, planar arrangement). Specifically, two LED boards 25 are arranged in parallel in a matrix in the chassis 22, two in the X-axis direction (row direction) and nine in the Y-axis direction (column direction). ing. The LED substrates 25 are arranged at an equal pitch in the Y-axis direction and are arranged at substantially equal intervals. Further, an insertion hole 25b through which the holding member 28 is passed is formed at a position corresponding to the mounting position of the holding member 28 in the LED substrate 25 (FIGS. 4 and 5).

The base material of the LED substrate 25 is made of the same metal as the chassis 22 such as an aluminum material, and a wiring pattern 25c made of a metal film such as a copper foil is formed on the surface of the substrate via an insulating layer. On the outer surface, a reflection layer (not shown) exhibiting a white color having excellent light reflectivity is formed. In addition, as a material used for the base material of LED board 25, it is also possible to use insulating materials, such as a ceramic.

(Diffusion lens)
The diffusing lens 27 is made of a synthetic resin material (for example, polycarbonate, acrylic, etc.) that is substantially transparent (having high translucency) and has a refractive index higher than that of air. As shown in FIGS. 4 and 5, the diffusing lens 27 has a predetermined thickness and is formed in a substantially circular shape when viewed from above, and covers each LED 24 individually from the front side with respect to the LED substrate 25. That is, each LED 24 is attached so as to overlap with each other when seen in a plane. The diffusing lens 27 can emit light having strong directivity emitted from the LED 24 while diffusing. That is, since the directivity of the light emitted from the LED 24 is relaxed through the diffusion lens 27, the area between the adjacent LEDs 24 is difficult to be visually recognized as a dark part even if the interval between the adjacent LEDs 24 is wide. Thereby, it is possible to reduce the number of installed LEDs 24. The diffusing lens 27 is disposed at a position that is substantially concentric with the LED 24 in a plan view. In FIG. 7, since the cross-sectional configuration of the harness holder 50 is illustrated, the side surface of the diffusing lens 27 disposed on the back side of the drawing is illustrated.

(Holding member)
The holding member 28 will be described. The holding member 28 is made of a synthetic resin such as polycarbonate, and has a white surface with excellent light reflectivity. As shown in FIGS. 4 and 5, the holding member 28 is fixed to the chassis 22 by protruding from the main body 28 a toward the back side, that is, the chassis 22, along the main body 28 a along the plate surface of the LED substrate 25. Part 28b. The main body 28 a has a substantially circular plate shape when seen in a plan view, and can hold at least the LED substrate 25 with the bottom plate 22 a of the chassis 22. The fixing portion 28b can be locked to the bottom plate 22a while penetrating the insertion holes 25b and the attachment holes respectively formed corresponding to the mounting positions of the holding member 28 on the LED board 25 and the bottom plate 22a of the chassis 22. . As shown in FIG. 6, a plurality of holding members 28 are appropriately distributed in the plane of the LED substrate 25, and are arranged at positions adjacent to the diffusion lens 27 (LED 24) in the X-axis direction. Yes.

The holding member 28 sandwiches the LED substrate 25 between the main body 25a and the bottom plate 22a of the chassis 22 without the bottom 29a of the reflection sheet 29 (first holding member), and the main body 25a. Two types are included, one that holds the bottom 29a of the reflection sheet 29 together with the LED substrate 25 between the bottom plate 22a of the chassis 22 (second holding member). Of these, the holding member 28 (second holding member) that holds the bottom 29a of the reflection sheet 29 together with the LED substrate 25 is provided with a support portion 28c that protrudes from the main body portion 28a to the front side, and the support portion 28c. Two types are included. The support portion 28c can support the optical member 23 (directly the diffusion plate 23a) from the back side, thereby maintaining a constant positional relationship between the LED 24 and the optical member 23 in the Z-axis direction. And inadvertent deformation of the optical member 23 can be restricted.

(Reflective sheet)
The reflection sheet 29 is made of a synthetic resin, and the surface thereof is white with excellent light reflectivity. As shown in FIGS. 3 to 5, the reflection sheet 29 has a size that is laid over almost the entire inner surface of the chassis 22, so that all the LED boards 25 arranged in parallel in the chassis 22 are arranged. Covering from the front side is possible. The reflection sheet 29 can efficiently raise the light in the chassis 22 toward the optical member 23 side. The reflection sheet 29 extends along the bottom plate 22a of the chassis 22 and covers a large portion of the bottom plate 22a. The reflection sheet 29 extends from the bottom plate 22a of the chassis 22 to the side plate 22b. Four bridge portions 29b that are integrally formed at the end and inclined with respect to the bottom portion 29a, and an extension portion that extends outward from the outer end of each bridge portion 29b and is placed on the receiving plate 22c of the chassis 22 29c. The bottom portion 29 a of the reflection sheet 29 is arranged so as to overlap the front side surface of each LED substrate 25, that is, the mounting surface of the LED 24. Further, the bottom 29a of the reflection sheet 29 is provided with a lens insertion hole (opening) 29d through which each diffusion lens 27 is inserted at a position overlapping with each diffusion lens 27 (each LED 24) in plan view.

Further, the bottom portion 29a is provided with a holding member insertion hole for passing the fixing portion 28b at a position overlapping with each holding member 28 in plan view, and particularly holds the LED substrate 25 without passing through the bottom portion 29a. The holding member insertion hole corresponding to the holding member 28 (first holding member) is set to a size that allows the main body portion 28a to pass therethrough. Thereby, the LED board 25 accommodated in the chassis 22 can be held in advance on the bottom plate 22a of the chassis 22 by the holding member 28 (first holding member), and then when the reflective sheet 29 is laid in the chassis 22 The bottom 29a is prevented from riding on the main body 28a of the holding member 28 (first holding member). The bottom 29a is held on the chassis 22 together with the LED board 25 by a holding member 28 (second holding member) attached after being laid in the chassis 22, and is unlikely to float or bend.

(Description of the configuration according to the main part of the present embodiment)
Now, as shown in FIG. 9, the LED board 25 according to this embodiment is supplied with electric power from the LED drive circuit board 30 via the wirings 31 and 32, so that each of the LED boards 25 mounted on the LED board 25 is mounted. It is possible to control the driving of the LED 24. Hereinafter, the configuration of the power feeding circuit and the wirings 31 and 32 in the LED board 25 and the harness holder 50 that holds the wirings 31 and 32 will be described. The LED drive circuit board 30 is connected to a power supply circuit board P (see FIG. 1) that is a power supply source of the liquid crystal display device 10 and is supplied with power.

First, the power supply circuit in the LED board 25 will be described. As shown in FIG. 2, the LED drive circuit board 30 is attached to the back side of the bottom plate 22a of the chassis 22, that is, the face opposite to the face on which the LED board 25 is disposed. The LED drive circuit board 30 is provided with a power board connector 30a to which a power board wiring connector 39 for wirings 31 and 32 described later is fitted and connected. As shown in FIG. 9, the power supply board connector 30a includes a positive power supply terminal portion 30b and a negative power supply terminal portion 30c. The positive-side power terminal portion 30b and the negative-side power terminal portion 30c are provided in the same number as the anode-side wiring 31 and the cathode-side wiring 32, which will be described later, and the number of the positive-side power-supply terminal portions 30b and the negative-side power terminal portions 30c are the same as the number of feeder circuits described later. . Furthermore, a predetermined voltage is applied to the LED drive circuit board 30 between the positive power terminal part 30b and the negative power terminal part 30c described above, whereby a direct current is applied to the LEDs 24 included in each LED board 25. An LED driving unit 30e that supplies and drives them is provided. The LED drive unit 30e can apply a different voltage for each set of positive electrode side power supply terminal unit 30b and negative electrode side power supply terminal unit 30c (system of power feeding circuit).

Of the both ends of the LED substrate 25 in the long side direction, the end on the outer edge side in the long side direction of the chassis 22 (the end on the side opposite to the LED substrate 25 adjacent in the X-axis direction) is shown in FIG. As shown in FIG. 9, a light source board connector 25a is provided. The light source board connector 25a is fitted and connected to a light source board wiring connector 41 provided on wirings 31 and 32, which will be described later. As shown in FIG. 9, the light source board connector 25a has both ends of a wiring pattern 25c formed on the LED board 25 and an anode side terminal portion 25d connected to one end side of the wiring pattern 25c. A cathode side terminal portion 25e connected to the other end side of the wiring pattern 25c is incorporated. The wiring pattern 25c extends along the long side direction on the LED substrate 25 and has a folded shape. Specifically, a portion extending from the anode side terminal portion 25d as a starting point crosses the adjacent LEDs 24. By connecting to the anode side terminal and the cathode side terminal (both not shown) of each LED 24, these LED 24 groups are connected in series and reach the end of the LED board 25 opposite to the light source board connector 25a. By the way, it is set as the form extended linearly toward the cathode side terminal part 25e of the light source board | substrate connector 25a after folding.

Since the LED drive circuit board 30 and the LED board 25 described above are arranged on opposite sides of the bottom plate 22a of the chassis 22, the bottom plate 22a of the chassis 22 is connected to the bottom plate 22a as shown in FIG. A wiring insertion hole 36 through which the anode side wiring 31 and the cathode side wiring 32 to be passed is formed. A pair of wiring insertion holes 36 are arranged on the outer edge portion of the bottom plate 22a of the chassis 22, and more specifically, are arranged near both corners on the upper side in the vertical direction of the bottom plate 22a. Furthermore, a wiring protection member 37 that surrounds the hole edge of the wiring insertion hole 36 is attached to the bottom plate 22a. The wiring protection member 37 is made of synthetic resin, and covers the hole edge of the wiring insertion hole 36 over the entire circumference and is held attached to the chassis 22 by sandwiching the hole edge from the front and back. The wiring protection member 37 has an opening that overlaps the wiring insertion hole 36 in a plan view and is slightly smaller than the wiring insertion hole 36, and the wirings 31 and 32 are passed through the opening. Thus, it is possible to go back and forth inside the chassis 22.

Next, the wirings 31 and 32 will be described. Each of the wirings 31 and 32 is made of a covered electric wire, and includes an anode side wiring 31 connected to the anode side of the LED 24 and a cathode side wiring 32 connected to the cathode side of the LED 24. Wiring connectors 39 and 41 are provided at both ends of the wirings 31 and 32, respectively. The power supply board connector 30a of the LED drive circuit board 30 or the light sources of the LED boards 25 corresponding to the wiring connectors 39 and 41, respectively. The board connector 25a can be fitted and connected.

The power supply board wiring connector 39 is fitted and connected to the power supply board connector 30a in the LED drive circuit board 30 as shown in FIG. The power supply board wiring connector 39 incorporates a positive electrode side wiring terminal portion 39 a connected to one end side of the anode side wiring 31 and a negative electrode side wiring terminal portion 39 b connected to one end side of the cathode side wiring 32. The positive electrode side wiring terminal portion 39a can be brought into conductive contact with the positive electrode side power supply terminal portion 30b in the power supply board connector 30a, and the negative electrode side wiring terminal portion 39b is connected to the negative electrode side power supply terminal portion 30c in the power supply substrate connector 30a. Conductive contact is possible.

The light source board wiring connector 41 is fitted and connected to the light source board connector 25a in the LED board 25 as shown in FIG. The light source board wiring connector 41 includes a positive-side wiring terminal portion 41 a connected to the other end side of the anode-side wiring 31 and a negative-side wiring terminal portion 41 b connected to the other end side of the cathode-side wiring 32. Has been. The positive electrode side wiring terminal portion 41a can be in conductive contact with the anode side terminal portion 25d in the light source substrate connector 25a, and the negative electrode side wiring terminal portion 41b is in conductive contact with the cathode side terminal portion 25e in the light source substrate connector 25a. It is possible.

As shown in FIG. 7, the light source board wiring connector 41 is provided with a connection portion 41c to the light source board connector 25a on the extending end side of the wirings 31 and 32. The wirings 31 and 32 are routed between the side plate 22b and the LED board 25, and the extension end side portion provided with the light source board wiring connector 41 is bent toward the LED board 25 side. The connection part 41c of the light source board wiring connector 41 is arranged to face the LED board 25 side. In the light source board connector 25a, as shown in FIG. 7, the part facing the side plate 22b is a connection part 25f to the light source board wiring connector 41, and at least the connection part 25f is connected to the bottom plate 22a of the chassis 22. It is arranged in a space S surrounded by the side plate 22 b and the bridge portion 29 b of the reflection sheet 29. With such a configuration, the light source board wiring connector 41 and the light source board connector 25a are connected in the space S.

The wirings 31 and 32 are led out to the outside of the back side of the bottom plate 22a through a wiring insertion hole 36 penetrating the bottom plate 22a of the chassis 22 at one end side, and a power board wiring connector 39 provided at one end side thereof is connected to the LED drive circuit board. The power supply board connector 30a on the 30th side is fitted and connected. Further, as shown in FIG. 6, the wirings 31 and 32 are arranged so as to be positioned substantially at the outer edge of the chassis 22 and correspond to the light source board wiring connector 41 provided on the other end side. The light source board connector 25a is fitted and connected.

As shown in FIG. 7, the wirings 31 and 32 are disposed between the wiring insertion hole 36 and the light source board connector 25 a in a space S surrounded by the bottom plate 22 a of the chassis 22, the side plate 22 b, and the bridge portion 29 b of the reflection sheet 29. It has been routed. In other words, each of the wirings 31 and 32 is arranged in the chassis 22 by using a gap held between the side plate 22b and the LED substrate 25, and is also a bridge portion having an inclined shape in the reflection sheet 29. 29b covers the entire area from the front side.

Specifically, the wirings 31 and 32 arranged on the left side in FIG. 6 are bent to substantially the right angle from the wiring insertion hole 36 arranged on the left side toward the left side along the X-axis direction (Y-axis direction ( It extends downward along the vertical direction) and is routed along the side plate 22 b of the chassis 22. When the position in the Y-axis direction extends to the same position as the LED board 25 to be connected, the LED board is bent substantially at a right angle and directed in the X-axis direction (rightward direction) via the light source board wiring connector 41. 25 to be connected. The wirings 31 and 32 are provided in the same number (9 in this embodiment) as the number of LED substrates 25 arranged in parallel along the Y-axis direction, and the Y between the LED substrate 25 to be connected and the wiring insertion hole 36 is provided. The wiring lengths are different depending on the positional relationship in the axial direction. Specifically, the wirings 31 and 32 connected to the LED board 25 located on the uppermost side in the vertical direction (closest to the wiring insertion hole 36) are the shortest, whereas the wirings 31 and 32 are located on the lowermost side in the vertical direction. The wirings 31 and 32 connected to the LED substrate 25 (farthest from the wiring insertion hole 36) are the longest. In addition, the wirings 31 and 32 arranged on the right side in FIG. 6 are configured so as to have a substantially symmetrical shape in which the left and right are reversed with respect to the wirings 31 and 32 arranged on the left side in the chassis 22. The description is omitted. A harness holder 50 is provided on the bottom plate 22a of the chassis 22 so as to be positioned on the wiring path (space S) of the wirings 31 and 32 and to hold the wirings 31 and 32 existing there in a bundled state. ing.

Next, the configuration of the harness holder 50 will be described. As shown in FIG. 8, the harness holder 50 is made of a synthetic resin and has a band shape that can be opened and closed. The harness holder 50 has a ring shape in which both ends are closed, thereby holding the wires 31 and 32 in the ring. It is supposed to be. The harness holder 50 is attached to the chassis 22 and positions the wires 31 and 32 with respect to the chassis 22. As shown in FIG. 7, the harness holder 50 is connected to the bottom plate contact portion 51 that contacts the bottom plate 22a, the side plate contact portion 52 that contacts the side plate 22b, the bottom plate contact portion 51, and the side plate contact portion 52. And a cover portion 53 that covers the wirings 31 and 32.

As shown in FIG. 7, the bottom plate contact portion 51 has a rectangular flat plate shape extending along the bottom plate 22a, and the bottom plate contact portion 51 of the harness holder 50 having a band shape at the right end in the longitudinal direction. A bottom plate contact portion side end surface 51 a that is a side end surface is provided, and a left end portion is connected to the side plate contact portion 52. The bottom plate abutting portion side end surface 51a is an inclined surface that is inclined with respect to the plate surface of the bottom plate abutting portion 51 having a plate shape, and has an indented recess that opens in the bottom plate abutting portion side end surface 51a. 51b is provided. The engaging recess 51b is to be engaged with an engaging protrusion 53c provided on a cover-side end surface 53b described later. An adhesive layer (not shown) is provided on the plate surface of the bottom plate contact portion 51 on the bottom plate 22 a side, and the harness holder 50 is fixed to the chassis 22.

As shown in FIG. 7, the side plate contact portion 52 has a rectangular flat plate shape extending along the side plate 22 b, and the lower end portion in the longitudinal direction is connected to the bottom plate contact portion 51 and the upper end portion is connected to the upper end portion. The cover part 53 is connected. An adhesive layer (not shown) is provided on the plate surface of the side plate contact portion 52 on the side plate 22 b side, and the harness holder 50 is fixed to the chassis 22 together with the bottom plate contact portion 51.

As shown in FIG. 7, the cover portion 53 has a rectangular flat plate shape, and a support surface 53 a having a shape following the bridge portion 29 b is provided on the outer circumferential surface of the ring-shaped harness holder 50. It has been. The support surface 53a extends along the bridge portion 29b from the bottom plate side end portion of the bridge portion 29b to the side plate side end portion, and is brought into contact with the bridge portion 29b. Specifically, the support surface 53a is an inclined surface having an inclination angle that is the same as the inclination angle of the bridge portion 29b with respect to the bottom plate 22a of the chassis 22 with the harness holder 50 attached, and the bridge portion 29b. It arrange | positions in the position contact | abutted to the surface at the side of the chassis 22. FIG. Note that the support surface 53a is in contact (contact) with the bridge portion 29b when the backlight device 12 is assembled, the support surface 53a and the bridge portion 29b may be in contact (contact) with each other. When the light device 12 is assembled, although the support surface 53a and the bridge portion 29b are separated from each other, the support surface 53a and the bridge portion are formed when the reflection sheet 29 is thermally expanded or when the reflection sheet 29 is bent due to its own weight. 29b may contact | abut (contact | abut) a surface.

As shown in FIG. 8, one end portion 53e located above the cover portion 53 is swingably connected to the upper end portion of the side plate contact portion 52, and the other end portion 53d is connected to the entire harness holder 50 as a ring. The wirings 31 and 32 are covered by swinging in the direction of closing in the direction (the direction of arrow D in FIG. 8). Specifically, the connection portion between the cover portion 53 and the side plate contact portion 52 is a thin portion 55 extending in the width direction of the band shape, and the entire cover portion 53 rotates around the thin portion 55 as an axis. It is said that.

As shown in FIG. 8, the other end 53d positioned below the cover 53 is provided with a cover-side end surface 53b positioned on the cover 53 side of the harness holder 50 having a band shape. And in the state where the harness holder 50 is closed, the cover part side end surface 53b is supposed to come into contact with the bottom plate contact part side end surface 51a, and the outer shape of the ring shaped harness holder 50 has both end faces ( The cover part side end surface 53b and the bottom plate contact part side end surface 51a) do not appear. The cover portion side end surface 53b is provided with an engaging convex portion 53c that is slightly larger in size than the concave shape of the engaging concave portion 51b of the bottom plate abutting portion 51 and is detachably engaged with the engaging concave portion 51b. It has been. The engaging convex portion 53c engages with the engaging concave portion 51b so as to push and expand the concave portion of the engaging concave portion 51b, and holds the harness holder 50 in a ring-shaped closed state.

The bottom plate contact portion 51, the side plate contact portion 52, and the cover portion 53 of the harness holder 50 are connected to each other to form a triangular shape in cross section. Specifically, in a state where the harness holder 50 is opened, the bottom plate contact portion side end surface 51a and the cover portion side end surface 53b form a U-shaped cross-sectional view, while the harness holder 50 is closed, The bottom plate contact part side end face 51a and the cover part side end face 53b are connected to form a triangular shape in cross section.

As shown in FIG. 6, the harness holder 50 is configured to hold wirings 31 and 32 that are routed along the side plate 22 b, and the plurality of harness holders 50 are arranged at a plurality of locations along the side plate 22 b. It is arranged. Specifically, in the harness holder 50, eight harness holders 50 are arranged between two adjacent LED substrates 25 and LED substrates 25 corresponding to nine LED substrates 25 arranged in parallel in the Y-axis direction. In addition, one harness holder 50 is disposed above the LED substrate 25 disposed on the uppermost side and between the LED substrate 25 and the wiring insertion hole 36. The harness holder 50 is configured to hold a different number of wires 31 and 32 depending on the position where the harness holder 50 is disposed. Specifically, the lowermost harness holder 50 in FIG. 6 holds a total of two wires 31 and 32 connected to the lowermost LED substrate 25, whereas it goes upward. Accordingly, the number of wirings 31 and 32 to be held increases by two, and the uppermost harness holder 50 is supposed to hold a total of 18 wirings 31 and 32.

The plurality of harness holders 50 are arranged so that the bottom plate contact portion 51 and the side plate contact portion 52 are along the outer edge portion of the chassis 22, respectively, and the extending direction of the support surface 53 a of the cover portion 53 is the same. It is arranged to be located in the plane. That is, each of the plurality of support surfaces 53a has a shape that follows the bridge portion 29b of the reflection sheet 29, and the extending direction of each support surface 53a coincides with the extension direction of the bridge portion 29b of the reflection sheet 29. The bridge portion 29b is configured to be supported at a plurality of locations from the chassis 22 side.

The procedure for arranging the harness holder 50 is as follows.
First, the harness holder 50 is attached to a predetermined portion of the chassis 22. Specifically, the bottom plate contact portion 51 and the side plate contact portion 52 are fixed to the end portion of the bottom plate 22a of the chassis 22 and the side plate 22b via an adhesive layer (not shown).

Subsequently, the harness holder 50 is opened and the wires 31 and 32 are accommodated. Specifically, the cover 53 is swung to the side opposite to the bottom plate contact portion 51 to separate the bottom plate contact portion side end surface 51a and the cover portion side end surface 53b, and through the gap, the predetermined wiring 31 is provided. 32 are accommodated inside the harness holder 50. That is, when the harness holder 50 is opened, the bottom plate contact portion 51 and the side plate contact portion 52 are L-shaped in cross section and function as a wiring housing portion that houses the wirings 31 and 32.

Subsequently, the harness holder 50 is closed and the wires 31 and 32 are held. Specifically, the cover 53 is swung in the bottom plate contact portion 51 side, that is, in the direction in which the harness holder 50 is closed like a ring (the direction of the arrow in FIG. 8), and the bottom plate contact portion side end surface 51a and the cover are covered. The part-side end surface 53b is brought into contact with it. At this time, the engagement convex part 53c provided in the cover part side end surface 53b is fitted in the engagement concave part 51b provided in the bottom plate contact part side end face 51a, and the harness holder 50 is maintained in a closed state. Then, a part of the wirings 31 and 32 are accommodated in the ring-shaped harness holder 50, and are bound to each other and positioned with respect to the chassis 22.

The above-described operation is repeated to arrange the plurality of harness holders 50 at predetermined locations. Finally, the reflection sheet 29 is laid from above the harness holder 50, and the arrangement of the harness holder 50 in the space S is completed. At this time, the support surface 53a of the harness holder 50 is disposed in contact with or close to the surface of the bridge portion 29b of the reflection sheet 29 on the chassis 22 side, so that the support of the bridge portion 22b by the harness holder 50 is realized. The

(Description of functions and effects according to the main part of the present embodiment)
As described above, the backlight device 12 of the present embodiment includes the LED 24, the chassis 22 having the bottom plate 22a on which the LED 24 is disposed, the side plate 22b rising from the bottom plate 22a toward the LED 24, and the LED 24. A reflection sheet 29 that reflects light from the chassis 22, and includes a reflection sheet 29 having at least a bridge portion 29 b that extends from the bottom plate 22 a to the side plate 22 b of the chassis 22, and wirings 31 and 32 connected to the LED 24. The wirings 31 and 32 routed in the space S surrounded by the bottom plate 22a, the side plate 22b, and the bridge portion 29b, and the ring-shaped harness holder 50 that holds the wirings 31 and 32, are in contact with the bottom plate 22a. The bottom plate contact portion 51, the side plate contact portion 52 that contacts the side plate 22b, and the bottom plate contact portion 51 and the side plate contact portion 52 are connected to the wiring 31. 32 with covering comprises a harness holder 50 and a cover portion 53 in the shape that follows the bridges 29 b, a.

According to the backlight device 12 of the present embodiment, the reflective sheet 29 includes the harness holder 50 having the cover portion 53 that is connected to the bottom plate contact portion 51 and the side plate contact portion 52 and has a shape that follows the bridge portion 29b. Can be supported by the harness holder 50 from the chassis 22 side. For this reason, it is possible to suppress the bridge portion 29b from being deformed, and to suppress display unevenness due to the deformation of the reflection sheet 29.

Specifically, the bridge portion 29b of the reflection sheet 29 reflects the light from the LED 24 toward the end of the chassis 22 to the light emitting portion side of the backlight device 12 to increase the luminance of the backlight device 12. Has been. Here, the bridge portion 29b of the reflection sheet 29 is more easily bent and bent than the chassis 22 which is a structural member having rigidity, and the optical path of the reflected light changes due to the deformation, resulting in display unevenness. It may cause. However, in the present embodiment, the bottom plate contact portion 51 and the side plate contact portion 52 that are in contact with the chassis 22 support the cover portion 53 connected thereto, and are provided on the cover portion 53. The bridge surface 29b is supported by the support surface 53a. For this reason, it is possible to stably support the bridge portion 29b of the reflection sheet 29 and to suppress bending deformation due to thermal expansion or its own weight, and to suppress a change in the optical path of light reflected by the bridge portion 29b. Can do.

Furthermore, in this embodiment, since the cover part 53 covers the wirings 31 and 32, the wirings 31 and 32 move outside the space S surrounded by the bottom plate 22 a and the side plate 22 b of the chassis 22 and the bridge part 29 b of the reflection sheet 29. Can be regulated. For this reason, it is possible to suppress the wirings 31 and 32 from pressing and deforming the reflection sheet 29, and to suppress display unevenness due to the deformation of the reflection sheet 29.

In the present embodiment, since the support surface 53a supports the bridge portion 29b in a state where the support surface 53a contacts the bridge portion 29b from the bottom plate side end portion to the side plate side end portion of the bridge portion 29b, the bridge portion 29b It is possible to more suitably suppress the deformation.

In the present embodiment, the harness holder 50 has a bottom plate contact portion 51, a side plate contact portion 52, and a cover portion 53 that form a triangular shape in cross section. In the space surrounded by 22a, the side plate 22b, and the bridge portion 29b, a sufficient space for accommodating the wires 31 and 32 can be secured, and the plurality of wires 31 and 32 can be bound.

Moreover, in this embodiment, since the harness holder 50 which has the cover part 53 is distribute | arranged in multiple places along the side plate 22b, the bridge part 29b can be supported in several places, and the bridge part 29b is It is possible to more suitably suppress the deformation.

In the present embodiment, the cover portion 53 has one end portion 53e pivotably connected to the side plate contact portion 52, and the other end portion 53d swings in a direction in which the harness holder 50 closes in a ring shape. Thus, the wirings 31 and 32 are covered. For this reason, when wiring the wirings 31 and 32, the wirings 31 and 32 are accommodated in the harness holder 50 with the cover 53 opened, and after the wirings 31 and 32 are wired, the cover unit The wirings 31 and 32 can be held with the state 53 closed, and the workability of routing the wirings 31 and 32 is excellent.

In the present embodiment, the cover portion 53 is configured such that the other end portion 53d is detachably engaged with the bottom plate contact portion 51 and the harness holder 50 is closed in a ring shape. . For this reason, the cover part 53 can be easily opened and closed, and it is excellent in the workability of the accommodation work of the wirings 31 and 32, and the wirings 31 and 32 without removing the harness holder 50 in repair or the like. After releasing the holding state, it is easy to set the wirings 31 and 32 again to the holding state.

In this embodiment, the plurality of wirings 31 and 32 are respectively connected to the plurality of LED substrates 25, and the harness holder 50 binds the plurality of wirings 31 and 32 together. Even in such a configuration, the wirings 31 and 32 can be wired while being bound by the harness holder 50, and the wirings 31 and 32 can be easily wired and held.

In the present embodiment, the LED board 25 is provided on the wirings 31 and 32 in the connection part 25f of the light source board connector 25a disposed in the space S surrounded by the bottom plate 22a, the side plate 22b, and the bridge part 29b. It is connected to the light source substrate wiring connector 41. For this reason, while connecting the wirings 31 and 32 and the LED board 25 in the space S surrounded by the bottom plate 22a, the side plate 22b, and the bridge portion 29b, the wirings 31 and 32 can be routed in the space S as they are. It is not necessary to route the wirings 31 and 32 to other positions, and the routing route of the wirings 31 and 32 can be shortened.

In the present embodiment, the wirings 31 and 32 include an anode side wiring 31 that is electrically connected to the anode side of the LED 24 and a cathode side wiring 32 that is electrically connected to the cathode side of the LED 24. An anode side wiring 31 and a cathode side wiring 32 are respectively connected to the LED substrate 25. For this reason, although the number of wirings is larger than a configuration in which a plurality of LED boards are connected to each other via a connector or the like, and only one of the anode side wiring and the cathode side wiring is connected to one LED board. The configuration related to the connector and the like can be abolished. Further, as such a configuration, even when the number of the wirings 31 and 32 is increased, since the harness holder 50 having the cover portion 53 is provided, the plurality of wirings 31 and 32 press the bridge portion 29b, There is no possibility that the bridge portion 29b is deformed.

In the present embodiment, the reflection sheet 29 is disposed along the bottom plate 22 a and has a bottom portion 29 a disposed so as to cover the LED substrate 25, and the bottom portion 29 a has a lens insertion hole for exposing the LED 24. Is provided. Therefore, the LED board 25 and the bottom plate 22a of the chassis 22 can be covered with the bottom part 29a of the reflection sheet 29, and the light toward the LED board 25 and the chassis 22 is reflected to the light emitting side by the bottom part 29a. Can increase the brightness.

In the present embodiment, since the reflection sheet 29 is formed by integrally forming the bridge portion 29b with the bottom portion 29a, there is no gap between the bottom portion 29a and the bridge portion 29b. The situation where the gap light enters can be avoided, and the luminance of the backlight device 12 can be increased.

<Embodiment 2>
A second embodiment of the present invention will be described with reference to FIG. In the second embodiment, a harness holder 150 in which a cover portion 153 is swingably connected to a bottom plate contact portion 151 is shown. In addition, the overlapping description about the same structure, an effect | action, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

The bottom plate abutting portion 151 has a longitudinal plate shape extending along the bottom plate 22a. The right end in the longitudinal direction is connected to the cover portion 153, and the side plate abutting portion 152 is connected to the left end. . An adhesive layer (not shown) is provided on the plate surface of the bottom plate contact portion 151 on the bottom plate 22 a side, and the harness holder 150 is fixed to the chassis 22.

The side plate contact portion 152 has a longitudinal plate shape extending along the side plate 22b, and a side plate contact portion that is an end surface on the side plate contact portion 152 side of the harness holder 150 having a band shape at the upper end portion in the longitudinal direction. A part-side end surface is provided, and a lower end part is connected to the bottom plate contact part 151. The end surface on the bottom plate contact portion side is an inclined surface that is inclined with respect to the plate surface of the plate-shaped side plate contact portion 152, and an engagement recess 151 b that has a concave shape opening on the side plate contact portion side end surface. Is provided. The engagement concave portion 151b is to be engaged with an engagement convex portion 153a provided on the cover portion side end surface described later. An adhesive layer (not shown) is provided on the plate surface of the side plate contact portion 152 on the side plate 22 b side, and the harness holder 150 is fixed to the chassis 22 together with the bottom plate contact portion 151.

One end portion located below the cover portion 153 is swingably connected to the right end portion of the bottom plate contact portion 151, and the other end portion swings in a direction in which the entire harness holder 150 is closed in a ring shape. Thus, the wiring 31 and 32 are covered. Specifically, the connecting portion between the cover portion 153 and the bottom plate abutting portion 151 is a thin portion 55 extending in the band-shaped width direction, and the entire cover portion 153 rotates around the thin portion 55 as an axis. It is said that.

The other end portion located above the cover portion 153 is provided with a cover portion side end surface located on the cover portion 153 side of the harness holder 150 having a band shape. When the harness holder 150 is closed, the end surface on the cover side faces the end surface on the side plate contact portion side, and both end surfaces appear on the outer shape of the ring-shaped harness holder 150. There is no. The cover portion side end surface is provided with an engaging convex portion 153a that is slightly larger in size than the concave shape of the engaging concave portion 151b of the side plate abutting portion 152 and is detachably engaged with the engaging concave portion 151b. ing. The engaging convex portion 153a is engaged with the engaging concave portion 151b so as to push and expand the concave portion of the engaging concave portion 151b, and holds the harness holder 150 in a ring-shaped closed state.

In the present embodiment, the cover portion 153 has one end portion connected to the bottom plate contact portion 151 so as to be swingable, and the other end portion swings in a direction in which the harness holder 150 is closed in a ring shape. , 32 are covered. For this reason, when wiring the wirings 31 and 32, the wirings 31 and 32 are accommodated in the harness holder 150 with the cover portion 153 opened, and after the wirings 31 and 32 are routed, The wirings 31 and 32 can be held with the 153 closed, and the workability of routing the wirings 31 and 32 is excellent.

Further, in the present embodiment, the cover portion 153 is configured such that the other end portion is detachably engaged with the side plate contact portion 152 and the harness holder 150 is closed in a ring shape. For this reason, the cover part 153 can be easily opened and closed, and is excellent in the workability of the accommodation work of the wirings 31 and 32, and the wirings 31 and 32 without removing the harness holder 150 in repair or the like. After releasing the holding state, it is easy to set the wirings 31 and 32 again to the holding state.

<Embodiment 3>
A third embodiment of the present invention will be described with reference to FIG. In this Embodiment 3, the harness holder 250 which changed the external shape of the harness holder 50 is shown. In addition, the description which overlaps about the structure, an effect | action, and effect similar to above-described embodiment is abbreviate | omitted.

The harness holder 250 includes a parallelogram flat plate cover portion 253, a rectangular flat plate side wall contact portion, and a parallelogram flat plate bottom plate contact portion. In a state where the shape is formed, a triangular shape in cross section is formed. According to the present embodiment, the bridge portion 29b can be supported in a state where the longitudinal direction of the support surface 253a of the cover portion 253 is inclined obliquely with respect to the short direction of the bridge portion 29b of the reflection sheet 29. For this reason, the support length with which the cover part 253 supports the bridge part 29b can be made longer than the width dimension of the bridge part 29b, and it can suppress that the bridge part 29b deform | transforms still more suitably.

<Embodiment 4>
A fourth embodiment of the present invention will be described with reference to FIG. In the fourth embodiment, a cover portion 353 in which the shape of the cover portion 53 is changed is shown. In addition, the description which overlaps about the structure, an effect | action, and effect similar to above-described embodiment is abbreviate | omitted.

The cover portion 353 has a rectangular plate shape that is curved so as to bend in the plate thickness direction, and a support surface 353a having a shape that follows the bridge portion 29b is formed on the outer circumferential surface of the ring-shaped harness holder 350. Is provided. The support surface 353a extends from the bottom plate side end portion of the bridge portion 29b to the side plate side end portion along the bridge portion 29b, and comes into contact with the bridge portion 29b. Specifically, the support surface 53a is a curved surface having the same shape as the curved shape of the bridge portion 29b that is recessed toward the chassis 22 with the harness holder 350 attached, and the chassis 22 of the bridge portion 29b. It arrange | positions in the position contact | abutted to the surface of the side.

In the present embodiment, the light traveling toward the end of the chassis 22 of the backlight device 12 is reflected to the light emitting side by the curved surface of the bridge portion 29b, and the curved shape is supported by the cover portion 53 of the harness holder 50. Display unevenness due to deformation of the reflective sheet 29 can be suppressed.

<Embodiment 5>
Embodiment 5 of the present invention will be described with reference to FIG. In the fifth embodiment, a harness holder 450 in which the attachment configuration of the harness holder 450 to the chassis 22 is changed is shown. In addition, the description which overlaps about the structure, an effect | action, and effect similar to above-described embodiment is abbreviate | omitted.

The bottom plate abutting portion 451 is provided with a locking claw portion 451c that is inserted into a harness holder mounting hole provided in the bottom plate 22a of the chassis 22 and locked to a hole edge. According to the present embodiment, the locking claw portion 451c can be attached to the harness holder attachment hole provided in the chassis 22 in advance, and the positioning and attachment of the harness holder 450 is easy.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In each of the above-described embodiments, the wirings 31 and 32 are routed along the short side direction of the chassis 22, and the harness holder 50 is illustrated along the short side direction of the chassis 22. The wirings 31 and 32 and the harness holder 50 may be arranged along the long side direction of the chassis 22.

(2) In each of the above-described embodiments, the configuration in which the harness holder 50 is arranged along the wiring path of the wirings 31 and 32 is exemplified. It is good also as a structure which distributes 50 and supports the bridge part 29b of a reflective sheet over the whole region of the peripheral edge part of a chassis.

(3) In each of the above-described embodiments, the configuration in which the plurality of wirings 31 and 32 and the plurality of harness holders 50 are arranged is exemplified, but a single wiring or harness holder may be provided.

(4) In addition to the above-described embodiments, the number, arrangement, and installation interval of the harness holders 50 can be appropriately changed.

(5) In each of the above-described embodiments, the harness holder 50 is exemplified as a ring shape by closing both ends of the band-shaped member. However, the harness holder is a member formed in a ring shape. In this case, the wiring can be held by inserting the wiring through the ring.

(6) In each of the above-described embodiments, the both end portions of the harness holder 50 are engaged with the engaging concave portion 51b and the engaging convex portion 53c. It is not limited to this. For example, other detachable engagement configurations may be used, and the non-detachable engagement may be performed with an adhesive or the like. In this case, it is preferable that the configuration related to the engagement does not appear in the outer shape of the harness holder 50 and does not interfere with the bridge portion.

(7) In the first and second embodiments described above, both ends of the harness holder 50 are the bottom plate contact portion side end surface 51a and the cover portion side end surface 53b, or the side plate contact portion side end surface and the cover portion side end surface. However, the position and shape of both end faces are not limited to this.

(8) In each of the embodiments described above, the bottom plate contact portion 51 and the side plate contact portion 52 are fixed to the chassis 22, but either the bottom plate contact portion 51 or the side plate contact portion 52 is used. May be fixed.

(9) In each of the above embodiments, the configuration in which the anode-side wiring 31 and the cathode-side wiring 32 are connected to the LED substrate 25 is exemplified. However, the present invention is not limited to this, and the anode-side wiring 31 and the cathode-side wiring 32 Only one of them may be connected.

(10) In each of the above-described embodiments, the anode side wiring 31 and the cathode side wiring 32 are exemplified as the wiring. However, the present invention is not limited to this, and any wiring connected to the light source may be used.

(11) In each embodiment described above, the LED 24 is exemplified as the light source, but the light source may be a cold cathode tube or a light bulb other than the LED.

(12) In addition to the above-described embodiments, the number, arrangement, and installation interval of LED substrates in the chassis can be changed as appropriate. In particular, it is also possible to arrange the LED substrates at unequal pitches in the column direction. In this case, the arrangement pitch is set to be narrower toward the center side in the column direction and wider toward both ends in the column direction. Is preferred. In addition, the number of LEDs mounted on each LED board, the arrangement, the installation interval, etc. can be changed as appropriate, and the number, the arrangement, the installation interval, etc. of the holding members for holding the LED boards can also be changed appropriately. .

(13) In addition to the above-described embodiments, in the LED substrate in which a plurality of LEDs are arranged in parallel in a matrix, only one wiring pattern is provided, and all the LEDs on the LED substrate are connected in series by the wiring pattern. It is also possible to do. In that case, one light source board connector and one wiring connector are provided for each LED board.

(14) In each of the embodiments described above, the LED substrate is shown in which the diffusion lens is installed so as to cover the LED, but the configuration in which the diffusion lens is removed is also included in the present invention.

(15) In each of the above-described embodiments, the liquid crystal panel and the chassis are vertically placed with the short side direction aligned with the vertical direction. However, the liquid crystal panel and the chassis have the long side direction in the vertical direction. Those that are in a vertically placed state matched with are also included in the present invention.

(16) 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.

(17) In each of the above-described embodiments, the liquid crystal display device using the liquid crystal panel as the display panel has been exemplified. However, the present invention can also be applied to display devices using other types of display panels.

(18) In each of the above-described embodiments, the television receiver provided with the tuner is exemplified, but the present invention is also applicable 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 ... Backlight device (illumination device), 22 ... Chassis, 22a ... Bottom plate, 24 ... LED (light source), 25,425 ... LED substrate (light source substrate), 25a ... light source substrate connector, 25c ... wiring pattern, 29 ... reflection sheet, 29a ... bottom, 29b ... Bridge part, 29d ... Lens insertion hole (opening), 30 ... LED drive circuit board, 30a ... Power supply board connector, 31 ... Anode side wiring, 32 ... Cathode side wiring, 36 ... Wiring insertion hole, 37 ... Wiring protection member, 39 ... Power supply board wiring connector, 41 ... Light source board wiring connector, 50, 150, 250, 350, 450 ... Harness holder, 51, 151, 451 ... bottom plate contact portion, 52, 152 ... side plate contact portion, 53, 153, 253, 353 ... cover portion 53a, 253a, 353a ... support surface, 53d ... bottom plate side end (other end), 53e ... side plate side end (one end), 55 ... thin portion, 451c ... Joint claw, S ... Space surrounded by bottom plate, side plate and bridge, TV ... TV receiver

Claims (14)

1. A light source;
   A chassis having a bottom plate on which the light source is arranged, and a side plate rising from the bottom plate to the light source side;
   A reflection sheet that reflects light from the light source, and at least a reflection sheet having a bridge portion that is disposed across the side plate from the bottom plate of the chassis;
   Wiring connected to the light source, and wiring arranged in a space surrounded by the bottom plate, the side plate, and the bridge portion;
   A ring-shaped harness holder that holds the wiring, and is connected to a bottom plate contact portion that contacts the bottom plate, a side plate contact portion that contacts the side plate, the bottom plate contact portion, and the side plate contact portion. A harness holder that covers the wiring and has a cover portion that follows the bridge portion;
   A lighting device comprising:
2. The cover portion has a support surface extending along the bridge portion from a bottom plate side end portion of the bridge portion to a side plate side end portion, and the support surface hits the bridge portion. Item 2. The lighting device according to Item 1.
3. The lighting device according to claim 1, wherein the harness holder includes a bottom plate contact portion, a side plate contact portion, and the cover portion that form a triangular shape in a sectional view.
4. The wiring is routed along the side plate,
   The lighting device according to claim 1, wherein the plurality of harness holders are arranged at a plurality of locations along the side plate.
5. One end of the cover portion is swingably coupled to either the bottom plate contact portion or the side plate contact portion, and the other end portion swings in the ring-shaped closing direction, The lighting device according to any one of claims 1 to 4, wherein the wiring is covered.
6. The cover portion is configured such that the other end portion is detachably engaged with the other bottom plate contact portion or the side plate contact portion to which the one end portion is not connected, and is closed in the ring shape. Item 6. The lighting device according to Item 5.
7. A light source board on which the light source is mounted;
   A plurality of the light source boards are arranged on the bottom plate of the chassis;
   A plurality of the wirings are connected to each of the plurality of light source substrates,
   The lighting device according to claim 1, wherein the harness holder binds the plurality of wires.
8. The lighting device according to claim 7, wherein the light source substrate is connected to the wiring at a portion disposed in a space surrounded by the bottom plate, the side plate, and the bridge portion.
9. The wiring has an anode side wiring electrically connected to the anode side of the light source, and a cathode side wiring electrically connected to the cathode side of the light source,
   The lighting device according to claim 7 or 8, wherein the anode-side wiring and the cathode-side wiring are connected to the light source substrate, respectively.
10. The reflective sheet is disposed along the bottom plate, and has a bottom portion disposed to cover the light source substrate,
    The lighting device according to any one of claims 7 to 9, wherein an opening for exposing the light source is provided at the bottom.
11. The lighting device according to claim 10, wherein the reflection sheet is formed by integrally forming the bridge portion with the bottom portion.
12. A display device comprising: the illumination device according to any one of claims 1 to 11; and a display panel that performs display using light from the illumination device.
13. 13. The display device according to claim 12, wherein the display panel is a liquid crystal panel in which liquid crystal is sealed between a pair of substrates.
14. A television receiver comprising the display device according to claim 12 or claim 13.

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