WO2015016212A1

WO2015016212A1 - Display device, television reception device, and cabinet

Info

Publication number: WO2015016212A1
Application number: PCT/JP2014/069924
Authority: WO
Inventors: 秀之近澤; 幸輝江尻; 畔柳　均; 稔之藤田
Original assignee: シャープ株式会社
Priority date: 2013-07-30
Filing date: 2014-07-29
Publication date: 2015-02-05
Also published as: JP2015028557A

Abstract

This liquid crystal display device (10) is provided with: a plate-shaped liquid crystal panel (11) having a display surface (DS) that displays an image; and a resin second cabinet (14) that is disposed in a manner so as to cover the liquid crystal panel (11) from the reverse side from the display surface (DS), and that comprises at least a first bottom plate (22), which has a plate surface along the plate surface of the liquid crystal panel (11), a second bottom plate (23), which has a plate surface along the plate surface of the liquid crystal panel (11) and is disposed in a manner so as to not be superposed on the first bottom plate (22) and is disposed further from the liquid crystal panel (11) than the first bottom plate (22), and a connection section (24) that connects the first bottom plate section (22) and the second bottom plate section (23).

Description

Display device, television receiver, and cabinet

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

The housing of a display such as a liquid crystal television is usually made of a resin molded product. In particular, the back panel arranged on the back side of a large liquid crystal television is the heaviest of the resin molded products that make up the housing. Therefore, weight reduction is required. If the thickness of the back panel is reduced in order to reduce the weight of such a back panel, the strength may be insufficient. Accordingly, a technique described in Patent Document 1 below is known as a technique for improving the rigidity while reducing the weight of a resin molded product such as the back panel described above.

JP 2010-36494 A

(Problems to be solved by the invention)
In Patent Document 1 described above, a panel that is a resin molded product is configured by a flat substrate and a grid-like rib that rises from the surface of the substrate, and the grid-like rib improves rigidity. Is described.
However, when the panel having the configuration described in Patent Document 1 described above is resin-molded, when the molten resin material flows from the substrate side toward the tip end of the rib in the molding die, The melted resin material could not reach, and there was a risk of forming defects. In particular, if the rib protruding dimension from the substrate is increased in order to further improve the rigidity of the panel, the above-described molding defects are more likely to occur. Therefore, there is a limit to increasing the rib protruding dimension. There was a limit to improving the rigidity of the panel.

The present invention has been completed based on the above circumstances, and an object thereof is to improve rigidity while suppressing the occurrence of molding defects.

(Means for solving the problem)
The display device of the present invention is a plate-shaped display component having a display surface for displaying an image, and a resin cabinet arranged to cover the display component from the side opposite to the display surface side, A first bottom plate portion having a plate surface along the plate surface of the display component; a plate surface extending along the plate surface of the display component; and the first bottom plate portion disposed on a side farther from the display component than the first bottom plate portion and the first And a cabinet having at least a second bottom plate portion arranged so as not to overlap with the bottom plate portion, and a connecting portion connecting the first bottom plate portion and the second bottom plate portion.

As described above, the cabinet arranged in such a manner as to cover the display component from the side opposite to the display surface side includes the first bottom plate portion that is relatively close to the display component and the second bottom plate portion that is relatively far from the display component. Are arranged so as to be non-overlapping with each other and are connected to each other by a connecting portion, so that sufficient rigidity is ensured even if they are made of resin. Thereby, since it is not necessary to arrange | position the metal components for ensuring rigidity between a display component and a cabinet, weight reduction and cost reduction can be achieved. In addition, since the cabinet is configured such that the first bottom plate portion and the second bottom plate portion are connected by the connecting portion, when the cabinet is resin-molded, the resin material melted in the molding die is the first bottom plate portion. And the second bottom plate part are easy to flow through the connecting part. Thereby, it is hard to generate | occur | produce a shaping | molding defect and the improvement of the yield rate is aimed at.

The following configuration is preferable as an embodiment of the present invention.
(1) The cabinet includes a reflective component that is disposed on a side opposite to the display surface with respect to the display component and reflects light toward the display component, and the first bottom plate portion Are arranged so as to support the reflective component from the side opposite to the display component side. Although the cabinet is made of resin, sufficient rigidity is ensured as described above. Therefore, the reflective component for reflecting the light toward the display component is opposite to the display component side by the first bottom plate portion. Can be stably supported. Thereby, since it is not necessary to use components, such as a metal chassis, in order to support a reflective component, weight reduction and cost reduction can be achieved. In addition, since the reflective component is supported by the first bottom plate portion of the cabinet, a resin molded product composed of a flat substrate as in the prior art and grid-like ribs rising from the surface of the substrate was used. In this case, burr is likely to occur on the edge of the rib, so that the reflective component is less likely to be scratched than the rib may cause the reflective component to be damaged, and the optical performance of the reflective component is exhibited well. Can do.

(2) The cabinet accommodates the light source and a light guide plate that is disposed between the display component and the reflective component and guides light from the light source, The first bottom plate portion is disposed in such a manner as to support the light guide plate from the side opposite to the display component side via the reflective component. If it does in this way, the light emitted from the light source will be light-guided by a light-guide plate, and it will be reflected toward a display component side by a reflective component, and is supplied to a display component. In such a configuration, for example, the display is not provided with a light guide plate, and the light source is disposed so as to face the plate surface of the display component and the light of the light source is directly irradiated on the plate surface of the display component. While the thickness of the device is reduced, the cabinet tends to have insufficient rigidity. On the other hand, since the cabinet has sufficient rigidity as described above, the light guide plate can be stably supported by the first bottom plate portion from the side opposite to the display component side through the reflective component. it can.

(3) The first bottom plate portion and the second bottom plate portion have side portions parallel to each other and are arranged adjacent to each other with the side portions interposed therebetween, and the connecting portion is the first bottom plate portion. A first side wall portion rising from the side portion toward the side opposite to the display component side, and a rising tip portion rising from the side portion of the second bottom plate portion toward the display component side. It consists of the 2nd side wall part connected with the standing | starting front-end | tip part of a side wall part. In this way, the leading end portions of the first side wall portion and the second side wall portion rising from the respective side portions of the first bottom plate portion and the second bottom plate portion that are adjacent to each other across the side portions parallel to each other are connected to each other. Since the connection part is comprised by, the rigidity of a cabinet can be improved suitably. In addition, when the cabinet is resin-molded, the resin material melted in the molding die is connected between the first bottom plate portion and the second bottom plate portion via a connecting portion composed of the first side wall portion and the second side wall portion. Therefore, the occurrence of molding defects is suitably suppressed.

(4) The first bottom plate portion and the second bottom plate portion are arranged side by side so as to be adjacent to each other so as to surround each outer peripheral portion, and the connecting portion is the first bottom plate portion of the first bottom plate portion. In the plurality of first side wall portions respectively rising from the plurality of side portions included in the outer peripheral portion, and the plurality of second bottom plate portions adjacent to the first bottom plate portion so as to surround the outer peripheral portion. A plurality of second side wall portions respectively rising from the plurality of side portions parallel to the plurality of side portions included in the outer peripheral portion of the first bottom plate portion, and the outside of the second bottom plate portion. In the plurality of second side wall portions respectively rising from the plurality of side portions included in the peripheral portion, and in the plurality of first bottom plate portions adjacent to the second bottom plate portion so as to surround the outer peripheral portion, In front of the second bottom plate A plurality of said first side wall portions raised from a plurality of said side portions parallel to the plurality of side portions included in the outer peripheral portion is configured as continuous. If it does in this way, the 1st side wall part which stands up from a plurality of sides contained in the peripheral part of the 1st bottom plate part from each side part of a plurality of 2nd bottom plate parts adjacent in the form which surrounds the peripheral part A plurality of first bottom plate portions that are continuous with the rising second side wall portion and that are adjacent to each other so that the second side wall portion rising from a plurality of sides included in the outer peripheral portion of the second bottom plate portion surrounds the outer peripheral portion. Since the connection part is comprised by continuing with respect to the 1st side wall part which stands up from each side part of this, the rigidity of a cabinet can be improved more. In addition, when the cabinet is resin-molded, the resin material melted in the molding die is a plurality of pieces connected to each other between the first bottom plate portion and the plurality of second bottom plate portions surrounding the outer peripheral portion. A plurality of first and second side walls that are connected to each other between the second bottom plate portion and the plurality of first bottom plate portions that surround the outer peripheral portion and flow through the first side wall portion and the second side wall portion. By flowing through the side wall portion, the fluidity is higher, and the occurrence of molding defects is more preferably suppressed.

(5) Whereas the first corner portion is formed between the first side wall portions rising from the adjacent side portions of the outer peripheral portion of the first bottom plate portion, the second bottom plate portion A second corner portion is formed between the second side wall portions rising from the side portions adjacent to each other in the outer peripheral portion, and surrounds the outer peripheral portion with respect to the second bottom plate portion. A plurality of second bottoms that are provided in a plurality of adjacent first bottom plate portions and that are adjacent to each other and that are adjacent to each other so as to surround the outer peripheral portion with respect to the first bottom plate portion. The second corner portions that are respectively provided in the bottom plate portion and are adjacent to each other are connected to each other. If it does in this way, while the 1st corner | angular part with which each of the some 1st bottom plate part adjacent to the shape which surrounds the outer periphery part with respect to a 2nd bottom plate part is respectively connected will be mutually adjacent, 1st bottom plate Since the second corners provided in each of the plurality of second bottom plate portions adjacent to each other so as to surround the outer peripheral portion thereof are connected to each other, the rigidity of the cabinet can be further improved. . In addition, when the cabinet is resin-molded, the resin material melted in the molding die is between the plurality of first bottom plate portions adjacent to each other in the form of surrounding the outer peripheral portion with respect to the second bottom plate portion. The fluid flows through the first corners that are connected to each other, and flows between the plurality of second bottom plates that are adjacent to the first bottom plate so as to surround the outer peripheral portion thereof, through the second corners that are connected to each other. By doing so, the fluidity becomes higher and the occurrence of molding defects is more preferably suppressed.

(6) The cross-sectional shape of the connecting portion is inclined with respect to the plate surfaces of the first bottom plate portion and the second bottom plate portion. In this way, when the cabinet is resin-molded, the cabinet, which is a molded product, is easily detached from the molding die when the molding die is opened, so that productivity is high.

(7) The first bottom plate portion and the second bottom plate portion have the same planar shape. In this way, compared to the case where the first bottom plate portion and the second bottom plate portion have different planar shapes, when an external force is applied to the cabinet, either the first bottom plate portion or the second bottom plate portion Since the occurrence of stress concentration is avoided, the rigidity of the cabinet can be improved more suitably. Moreover, the design property regarding the external appearance of a cabinet becomes a favorable thing.

(8) The first bottom plate portion and the second bottom plate portion have a square shape in plan view. If it does in this way, since the external appearance of a cabinet will exhibit a checkered pattern as a whole, it is excellent in design nature.

(9) The cabinet has a rectangular planar shape, and the first bottom plate portion and the second bottom plate portion have a rectangular planar shape and have long sides parallel to the long sides of the cabinet. It is arranged. Although the cabinet having a rectangular planar shape tends to be easily deformed such as bending or warping along its short side, the planar shape of the first bottom plate portion and the second bottom plate portion is rectangular and its By arranging the long side in parallel with the long side of the cabinet, it is difficult for the cabinet to be deformed such as bending or warping along the short side. Thereby, the rigidity of a cabinet can be improved more suitably.

(10) The cabinet constitutes the appearance of the display device. If it does in this way, the design property which concerns on the external appearance of the said display apparatus can be made favorable by the planar shape and arrangement | positioning of a 1st bottom plate part and a 2nd bottom plate part.

The television receiver of the present invention includes the display device described above. According to such a television receiver, in addition to being less likely to cause molding defects in the cabinet provided in the display device and having improved rigidity, the weight and cost of the display device are reduced. Improvement of productivity, improvement of rigidity, weight reduction and cost reduction are realized.

(The invention's effect)
According to the present invention, it is possible to improve the rigidity while suppressing the occurrence of molding defects.

1 is a partially cutaway perspective view showing a schematic configuration of a front side of a television receiver and a liquid crystal display device according to Embodiment 1 of the present invention. Partially cutaway perspective view showing schematic configuration of back side of television receiver and liquid crystal display device The partially cutaway perspective view which expanded the edge part by the side of the LED unit in FIG. The partially cutaway perspective view which expanded the edge part on the opposite side to the LED unit side in FIG. Sectional drawing which shows the cross-sectional structure which cut | disconnected the liquid crystal display device along the long side direction Sectional drawing which expanded the edge part by the side of the LED unit in FIG. Sectional drawing which shows the support structure of the heat radiating member etc. which change the cutting position about a Y-axis direction with FIG. 5, and are contained in an LED unit Sectional drawing which expanded the edge part on the opposite side to the LED unit side in FIG. The perspective view which shows schematic structure of the front side of a 2nd cabinet The perspective view which expanded the heat radiating member non-overlapping part in FIG. The perspective view which shows schematic structure of the back side of a 2nd cabinet. The perspective view which expanded the heat radiating member non-overlapping part in FIG. Xiii-xiii sectional view of FIG. Xiv-xiv sectional view of FIG. Xv-xv sectional view of FIG. Xvi-xvi sectional view of FIG. The perspective view which shows schematic structure of the front side of the 2nd cabinet which concerns on Embodiment 2 of this invention. The perspective view which expanded the heat radiating member non-overlapping part in FIG. The perspective view which shows schematic structure of the back side of a 2nd cabinet. The perspective view which expanded the heat radiating member non-overlapping part in FIG. Xxi-xxi sectional view of FIG. Xxii-xxii cross-sectional view of FIG. Xxiii-xxiii sectional view of FIG. Xxiv-xxiv sectional view of FIG. The top view of the 2nd cabinet concerning Embodiment 3 of the present invention. Bottom view of the second cabinet Xxvii-xxvii line cross-sectional view of FIG. Xxviii-xxviii line cross-sectional view of FIG. Xxix-xxix cross-sectional view of Fig. 25 Xxx-xxx sectional view of FIG. Sectional drawing which shows the cross-sectional structure which cut | disconnected the heat radiation non-overlapping 1st bottom board part contained in the heat radiating member non-overlapping part of the 2nd cabinet which concerns on Embodiment 4 of this invention along the diagonal which connects the corner | angular parts of each bottom board part. Sectional drawing which shows the cross-sectional structure which cut | disconnected the heat radiation non-overlapping 2nd bottom plate part contained in the heat radiating member non-overlapping part of a 2nd cabinet along the diagonal which connects the corner | angular parts of each bottom plate part. The bottom view of the 2nd cabinet concerning Embodiment 5 of the present invention. The bottom view of the heat radiating member non-overlapping part of the 2nd cabinet which concerns on Embodiment 6 of this invention. The bottom view of the heat dissipation member non-overlapping part of the 2nd cabinet concerning Embodiment 7 of the present invention. The bottom view of the heat radiating member non-overlapping part of the 2nd cabinet which concerns on Embodiment 8 of this invention. The bottom view of the heat dissipation member non-overlapping part of the 2nd cabinet concerning Embodiment 9 of the present invention. The bottom view of the heat radiating member non-overlapping part of the 2nd cabinet which concerns on Embodiment 10 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. In addition, a part of each drawing shows an X axis, a Y axis, and a Z axis, and each axis direction is drawn to be a direction shown in each drawing. Moreover, let the upper side shown in FIGS. 5-8 be a front side, and let the lower side of the figure be a back side.

As shown in FIGS. 1 and 2, the television receiver TV according to this embodiment includes a liquid crystal display device 10 having a display surface DS for displaying an image on the front side (front side), and a back side (rear side) of the liquid crystal display device 10. And a tuner that is arranged on the back side of the liquid crystal display device 10 and receives a television broadcast and outputs a television image signal or the like to the liquid crystal display device 10. And a cover member CV attached to the back side of the liquid crystal display device 10 so as to cover the power supply substrate and the tuner substrate.

As shown in FIGS. 1 and 2, the liquid crystal display device (display device) 10 has a horizontally long rectangular shape as a whole, and a liquid crystal panel 11 that is a display component and an illumination device that supplies illumination light to the liquid crystal panel 11. And a first cabinet (display surface side cabinet) 13 that supports the liquid crystal panel 11 from the front side and holds the liquid crystal panel 11 between the backlight device 12 and the backlight device (illumination device) 12. At least. Among these, the liquid crystal panel 11 is assembled to the liquid crystal display device 10 in a posture in which the display surface DS for displaying an image faces the front side. The first cabinet 13 is made of synthetic resin, and is formed in a frame shape (frame shape) extending along the outer peripheral end of the liquid crystal panel 11 as a whole. In the television receiver TV and the liquid crystal display device 10, A front-side appearance member is configured. As shown in FIGS. 3 and 4, the first cabinet 13 extends in a shape that follows the outer peripheral end of the liquid crystal panel 11 and has a first frame main body (frame-shaped portion) that has a rectangular frame shape when viewed from above. 13 a and a first cabinet outer wall portion (tubular portion) 13 b that is continuous with the outer peripheral end portion of the first cabinet body 13 a and surrounds the backlight device 12 from the outer peripheral side. A panel support portion 13a1 that protrudes toward the back side, that is, the liquid crystal panel 11 side and supports the display surface DS of the liquid crystal panel 11 from the front side is provided around the entire circumference at the inner peripheral side end of the first frame body 13a. ing.

First, the liquid crystal panel 11 will be described. As shown in FIGS. 1, 3 and 4, the liquid crystal panel 11 has a horizontally long rectangular shape in plan view, and a pair of glass substrates excellent in translucency are separated from each other by a predetermined gap. And the liquid crystal is sealed between both substrates. One substrate (array 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 other substrate (CF substrate) is provided with a color filter or counter electrode in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement, and an alignment film. ing. Note that a pair of front and back polarizing plates are respectively attached to the outer surface sides of the pair of substrates.

Next, the backlight device 12 will be described. As shown in FIGS. 3 and 4, the backlight device 12 includes an LED unit (light source unit) LU including an LED (Light Emitting Diode) 16 as a light source, and light from the LED unit LU. A light guide plate (optical member) 19 that guides light, a reflective sheet (reflective component, optical member) 20 that is disposed on the back side of the light guide plate 19 and reflects light to the front side, that is, the liquid crystal panel 11 side, and the front side of the light guide plate 19 An optical sheet (optical member) 15 arranged on the back, a second cabinet (cabinet) 14 arranged to support the light guide plate 19 from the back side through the reflection sheet 20 and cover the liquid crystal panel 11 from the back side, The optical plate 19 is supported from the front side, and the light guide plate 19 and the reflection sheet 20 are sandwiched between the second cabinet 14 and held. And arm 21 is provided with at least. The LED unit LU includes an LED 16, an LED substrate (light source substrate) 17 on which a plurality of LEDs 16 are mounted, and a heat dissipation member 18 to which the LED substrate 17 is attached. The backlight device 12 has an LED unit LU (including a plurality of LEDs 16) at one end (the right side shown in FIG. 1, the left side shown in FIGS. 2 and 3) of the both ends on the short side. It is arranged in an unevenly distributed manner, and is a one-side incident type edge light type (side light type) that enters the light guide plate 19 only from one side. Below, each component of the backlight apparatus 12 is demonstrated in detail.

First, the configuration of the LED 16, the LED substrate 17, and the heat dissipating member 18 constituting the LED unit LU will be sequentially described. As shown in FIGS. 5 and 6, the LED 16 has a configuration in which an LED chip is sealed with a resin material on a substrate portion fixed to the LED substrate 17. The LED chip has a single 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. It is supposed to emit. The LED 16 is a so-called top surface light emitting type in which a surface opposite to the mounting surface with respect to the LED substrate 17 is a main light emitting surface.

As shown in FIGS. 5 and 6, the LED substrate 17 has an elongated plate shape extending along the short side direction of the backlight device 12 (Y-axis direction, the longitudinal direction of the light incident surface 19 b of the light guide plate 19). At the same time, it is attached to the heat radiating member 18 in a posture in which the plate surface is parallel to the Y-axis direction and the Z-axis direction, that is, in a posture orthogonal to the plate surfaces of the liquid crystal panel 11 and the light guide plate 19 (optical sheet 15). It is accommodated in the light device 12. The LED substrate 17 is attached such that the plate surface opposite to the mounting surface on which the LED 16 is mounted is in contact with the heat radiating member 18, and is on the short side end surface (light incident surface 19 b) of the light guide plate 19. They are arranged opposite to each other with a predetermined interval. Accordingly, the alignment direction of the LEDs 16 and the LED substrate 17 and the light guide plate 19 is substantially coincident with the X-axis direction, and the optical axis in each LED 16, that is, the traveling direction of light having the highest light emission intensity is the X-axis direction (liquid crystal panel). 11 in the direction parallel to the plate surface).

Among the plate surfaces of the LED substrate 17, a plurality of LEDs 16 are arranged on the plate surface facing the light guide plate 19 (the plate surface facing inward), as shown in FIGS. 5 and 6. They are arranged intermittently at substantially equal intervals along the direction (the short side direction of the liquid crystal panel 11 and the light guide plate 19 and the Y-axis direction). Each LED 16 is mounted on the surface of the LED substrate 17 facing the light guide plate 19 (the surface facing the light guide plate 19), and this is the mounting surface. A wiring pattern (not shown) is formed on the mounting surface of the LED substrate 17 to connect the adjacent LEDs 16 in series across the LED 16 group.

The heat dissipating member 18 is made of a metal having excellent thermal conductivity such as aluminum, for example, and extends along the short side direction of the light guide plate 19 as a whole, as shown in FIGS. The length dimension is substantially the same as the length dimension of the LED substrate 17 and is approximately the same as or slightly larger than the short side dimension of the light guide plate 19. The heat radiating member 18 includes a substrate housing portion 18a that houses the LED substrate 17 and a main heat radiating portion 18b that extends from the substrate housing portion 18a toward the center of a light guide plate 19 described later. Moreover, this heat radiating member 18 is attached with respect to the attachment wall part 14c of the 2nd cabinet 14 mentioned later.

As shown in FIG. 6, the substrate housing portion 18 a constituting the heat radiating member 18 has a plate-like shape having a plate surface parallel to the plate surface of the LED substrate 17 and has a substrate attachment portion 18 a 1 to which the LED substrate 17 is attached. ing. A bottom wall portion 18a2 that is bent substantially at a right angle to the substrate mounting portion 18a1 and protrudes toward the light guide plate 19 along the X-axis direction is provided from the rear side end portion of the substrate mounting portion 18a1. . From the protruding end portion of the bottom wall portion 18a2 from the substrate mounting portion 18a1, it rises toward the front side, is bent to have an obtuse angle with respect to the bottom wall portion 18a2, and is predetermined between the substrate mounting portion 18a1. The side wall part 18a3 which makes the opposing shape at intervals is provided. The width dimension of the side wall part 18a3 (the rising dimension in the Z-axis direction from the bottom wall part 18a2) is set to be smaller than the same width dimension of the board mounting part 18a1. The LED substrate 17 is accommodated in a space provided between the substrate attachment portion 18a1 and the side wall portion 18a3 constituting the substrate accommodation portion 18a, and is attached to the substrate attachment portion 18a1.

As shown in FIG. 6, the main heat radiating portion 18 b extends in a cantilever manner along the X-axis direction from the side wall portion 18 a 3 toward the center of the light guide plate 19, and the reflection sheet 20, the second cabinet 14, It is arranged in the form of being sandwiched between. The main heat radiating portion 18b has a plate shape in which the plate surface is parallel to the plate surfaces of the light guide plate 19 and the bottom wall portion 18a2, the length direction is the Y-axis direction, the width direction is the X-axis direction, and the plate The thickness direction coincides with the Z-axis direction. The main heat radiating part 18b has a width dimension (extension dimension in the X-axis direction from the side wall part 18a3) larger than the short side dimension of the light guide plate 19 and the second cabinet 14, but the light guide plate 19 and the second cabinet 14 The long side dimension is smaller than the long side dimension, specifically, about 1/4 of the long side dimension. Thereby, since the main heat radiating part 18b has a sufficiently large surface area, it efficiently dissipates the heat transmitted from the LED 16 through the LED board 17 and the board housing part 18a with lighting. Is possible. Of the main heat radiating portion 18b, two protruding portions 18b1 projecting partially toward the back side and having a trapezoidal cross section at two locations on the way from the extending base end portion to the extending distal end portion from the side wall portion 18a3. Is formed. The main heat radiating portion 18b supports the light guide plate 19 from the back side through the reflection sheet 20 with the front side surface in contact with the back side surface of the reflection sheet 20 with respect to the portions excluding the formation portions of the protrusions 18b1. ing. In other words, the reflective sheet 20 is sandwiched and held between the main heat radiating portion 18 b and the light guide plate 19. On the other hand, the protruding portion 18b1 is not in contact with the reflection sheet 20 and is arranged in an opposing manner with a predetermined interval on the back side with respect to the reflection sheet 20, but the second cabinet arranged on the back side. 14 and is supported from the back side (see FIG. 7). That is, the second cabinet 14 supports the reflection sheet 20 and the light guide plate 19 via the heat dissipation member 18. The protrusion dimension (dimension about the Z-axis direction) from the main heat radiating part 18b in the protrusion part 18b1 is smaller than the protrusion dimension from the bottom wall part 18a2 in the side wall part 18a3. Further, the protruding portion 18b1 includes a portion disposed relatively near the extended base end portion (side wall portion 18a3) and a portion disposed relatively close to the extended distal end portion.

The light guide plate 19 is made of a synthetic resin material (for example, acrylic resin such as PMMA or polycarbonate) having a refractive index sufficiently higher than air and substantially transparent (excellent translucency). As shown in FIGS. 5 and 6, the light guide plate 19 has a horizontally long rectangular shape when viewed in a plane like the liquid crystal panel 11 and the optical sheet 15, and the long side direction on the plate surface is the X-axis direction. The short side direction coincides with the Y-axis direction, and the plate thickness direction perpendicular to the plate surface coincides with the Z-axis direction. The light guide plate 19 is arranged on the back side of the optical sheet 15 so as to be opposed to each other with a predetermined interval. The light guide plate 19 is disposed immediately below the liquid crystal panel 11 and the optical sheet 15, and one end surface on the short side of the outer peripheral end surfaces thereof is opposed to the LEDs 16 included in the LED unit LU. . Accordingly, the alignment direction of the LED 16 (LED substrate 17) and the light guide plate 19 coincides with the X-axis direction, while the alignment direction of the optical sheet 15 (liquid crystal panel 11) and the light guide plate 19 matches the Z-axis direction. It is assumed that both directions are orthogonal to each other. Then, the light guide plate 19 introduces the light emitted from the LED 16 from the end surface on the short side, and rises toward the optical sheet 15 side (front side, light emission side) while propagating the light inside. It has a function of emitting light from the surface.

Of the pair of front and back plate surfaces of the light guide plate 19, the plate surface facing the front side (the surface facing the optical sheet 15) directs the internal light toward the optical sheet 15 and the liquid crystal panel 11 as shown in FIG. 6. It becomes the light emission surface 19a to emit. Of the outer peripheral end surfaces adjacent to the plate surface of the light guide plate 19, one of the end surfaces on the pair of short sides that are long along the Y-axis direction (LED 16 alignment direction, LED substrate 17 long side direction) ( The end surface on the left side in FIG. 5 is opposed to the LED 16 (LED substrate 17) with a predetermined space therebetween, and this is a light incident surface 19b on which light emitted from the LED 16 is incident. As described above, the space between the light incident surface 19b and the LED 16 allows the light incident surface 19b to interfere with the LED 16 when the light guide plate 19 is thermally expanded by heat from the LED 16 or the like. Can do. Moreover, the distance between each light-incident surface 19b and each LED16 which opposes is made substantially the same. The light incident surface 19b is a surface parallel to the plate surface of the LED substrate 17, and is a surface substantially orthogonal to the light emitting surface 19a.

As shown in FIGS. 5 and 6, the reflection sheet 20 has a back side of the light guide plate 19, that is, an opposite plate surface opposite to the light emitting surface 19 a (a surface facing the main heat radiating portion 18 b of the heat radiating member 18) 19 c. It is arranged so as to cover, and it is possible to reflect the light emitted from the opposite plate surface 19c to the outside on the back side and to rise to the front side. In other words, the reflection sheet 20 is disposed between the main heat radiating portion 18 b of the heat radiating member 18 and the light guide plate 19. The reflection sheet 20 is slightly larger in size in plan view than the light guide plate 19, and can cover the opposite plate surface 19 c of the light guide plate 19 over almost the entire region. The reflection sheet 20 is larger in size (long side dimension and short side dimension) than the light guide plate 19 in a plan view. Further, on the opposite plate surface 19c of the light guide plate 19, a light reflection pattern (see FIG. 5) is formed by a light reflecting portion for reflecting the light in the light guide plate 19 toward the light emission surface 19a. (Not shown) is formed.

As shown in FIG. 5, the optical sheet 15 has a horizontally long rectangular shape when viewed in a plane, like the liquid crystal panel 11, and the size (short side dimension and long side dimension) viewed in the plane is the liquid crystal panel 11. It is supposed to be a little smaller than that. The optical sheet 15 is disposed so as to be interposed between the liquid crystal panel 11 and the light guide plate 19, thereby transmitting the light emitted from the light guide plate 19 and providing a predetermined optical action to the transmitted light. The light is emitted toward the panel 11. The optical sheet 15 has a sheet shape that is thinner than the light guide plate 19 and a plurality of sheets (three sheets in the present embodiment) are stacked with almost no gap between them to constitute a group of optical sheets 15. The optical sheet 15 group is interposed with a predetermined gap between at least the front surface of the light guide plate 19 on the back side (light emitting surface 19a).

The frame 21 is made of synthetic resin, and as shown in FIGS. 2 and 5, extends in a shape that follows the outer peripheral ends of the liquid crystal panel 11 and the light guide plate 19 and has a rectangular frame shape (see FIG. 2). It has a frame main body (frame-shaped portion) 21a forming a frame shape. The frame main body 21a is arranged to face the outer peripheral end of the light guide plate 19 on the front side, and can support the outer peripheral end of the light guide plate 19 from the front side over substantially the entire periphery. The frame main body 21 a is arranged in a form sandwiched between the first cabinet main body 13 a of the first cabinet 13 and the mounting wall portion 14 c of the second cabinet 14. One short side portion of the frame main body 21a that is opposed to the LED unit LU is arranged so as to cover the space between the LED unit LU and the light guide plate 19 from the front side over almost the entire area. Since the space is optically independent from the optical sheet 15 and the liquid crystal panel 11, it is possible to block light emitted from the LED 16 toward the front side, and the light does not pass through the light guide plate 19 and the optical sheet 15 or the liquid crystal panel. It is possible to prevent light leakage directly incident on the light source 11. As shown in FIG. 5, the frame main body 21 a has a substantially stepped shape with a three-stage cross section, and the highest first step portion 21 a 1 supports the first cabinet main body 13 a of the first cabinet 13 from the back side, The second step portion 21a2 having an intermediate height supports the outer peripheral end portion of the liquid crystal panel 11 from the back side, and the lowest third step portion 21a3 supports the outer peripheral end portion of the optical sheet 15 from the back side. Further, as shown in FIGS. 3 and 4, the frame 21 can be held attached to the second cabinet 14 at the outer end of the frame body 21 a (the end opposite to the light guide plate 19 side). A cantilevered mounting piece 21b is provided so as to extend toward the back side.

Subsequently, the second cabinet 14 will be described in detail. The second cabinet 14 is made of synthetic resin, and as shown in FIGS. 1 and 2, as a whole, has a substantially box shape that opens toward the front side, and the back side of the television receiver TV and the liquid crystal display device 10. The external appearance member is comprised. When the second cabinet 14 is manufactured, for example, an injection molding method is used. Specifically, a molten resin material is filled in the molding die, and when the resin material is solidified, the molding die is molded. By opening the mold, the second cabinet 14 which is a molded product is taken out. As shown in FIG. 5, the second cabinet 14 has a second cabinet body (main bottom plate portion) 14 a having a substantially plate shape so as to cover the light guide plate 19 (reflective sheet 20) and the heat radiating member 18 from the back side, and a second cabinet 14. A second cabinet outer wall portion (tubular portion) 14b that rises from the outer peripheral end of the cabinet body 14a toward the front side, and a second cabinet outer wall portion 14a that rises toward the front side at a position inside the second cabinet outer wall portion 14b. It includes at least an attachment wall portion 14c to which the LED unit LU and the frame 21 are attached.

As shown in FIGS. 5, 9 and 11, the second cabinet body 14a is formed in a horizontally long rectangular shape like the light guide plate 19 and the reflection sheet 20, and has a size (long side dimension) viewed in the plane. And the short side dimension) are larger than the same size of the light guide plate 19 and the reflection sheet 20. The second cabinet body 14a has a posture in which the long side direction coincides with the X-axis direction, the short side direction coincides with the Y-axis direction, and the plate thickness direction coincides with the Z-axis direction. The second cabinet body 14 a constitutes an outer wall on the back side of the television receiver TV and the liquid crystal display device 10. The second cabinet body 14a includes a heat dissipation member non-overlapping portion (light source unit non-overlapping portion) 14a1 that does not overlap with the heat dissipation member 18 of the LED unit LU in plan view, and a heat dissipation member overlap that overlaps with the heat dissipation member 18 in plan view. Part (light source unit overlapping part) 14a2. The heat radiating member non-overlapping portion 14a1 has a larger area ratio in the second cabinet body 14a than the heat radiating member overlapping portion 14a2, and specifically occupies about 3/4 of the area of the second cabinet main body 14a. ing. The heat radiating member overlapping portion 14a2 is disposed near the end of one side (the right side shown in FIG. 9 and the left side shown in FIG. 11) in the long side direction (X-axis direction) of the second cabinet body 14a. Furthermore, the heat dissipating member non-overlapping portion 14a1 includes a metal fitting attaching portion 14a3 to which a metal fitting (not shown) for increasing the degree of freedom of the installation mode of the liquid crystal display device 10 is attached from the back side. The bracket mounting portion 14a3 is arranged in the center of the second cabinet main body 14a in the long side direction and closer to the lower end shown in FIGS. 9 and 11, and directly with the heat dissipating member overlapping portion 14a2. The arrangement is not adjacent. The metal fittings attached to the metal fitting attaching portion 14a3 are, for example, a monitor arm in which the liquid crystal display device 10 is installed on the wall surface of the room in a wall-mounted state, suspended from the ceiling, or fixed to a desk. It is for attaching to (arm stand). In addition, the heat radiating member overlapping portion 14a2 is formed so that a heat radiating hole (vent hole) HR for allowing the inside and outside air to pass therethrough penetrates the heat radiating member overlapping portion 14a2. It can be discharged to the outside (see FIGS. 3 and 7). In addition, in FIG. 9 to FIG. 12, illustration of the heat radiation hole HR is omitted.

As shown in FIGS. 5 and 9, the second cabinet outer wall portion 14 b is provided over the entire circumference of the outer peripheral end portion of the second cabinet body 14 a and is formed in a substantially cylindrical shape that is a horizontally long rectangle when viewed in plan. Has been. The second cabinet outer wall portion 14b has a rising tip portion that is unevenly fitted to the rising tip portion of the first cabinet outer wall portion 13b of the first cabinet 13, so that the television receiving device TV and the first cabinet outer wall portion 13b are connected to the second cabinet outer wall portion 14b. The outer peripheral wall of the liquid crystal display device 10 is configured. The mounting wall portion 14c is formed in a substantially cylindrical shape, which is a horizontally long rectangle as a whole, following the second cabinet outer wall portion 14b. The mounting wall portion 14c has a rising dimension from the second cabinet body 14a (dimension in the Z-axis direction) larger than the same dimension of the second cabinet outer wall portion 14b, and the rising tip portion and the first cabinet The frame 21 can be held between the main body 13a and the main body 13a. As shown in FIGS. 3 and 4, a mounting hole portion 14 c 1 is formed in a part of the mounting wall portion 14 c, and a claw portion of the mounting piece portion 21 b provided in the frame 21 is engaged therewith. Thus, it is possible to hold the attached frame 21 in a retaining state. Of the mounting wall portion 14c having a substantially cylindrical shape, a substrate mounting portion 18a1 of the substrate housing portion 18a of the heat radiating member 18 forming the LED unit LU is formed on the inner side (light guide plate 19 side) of the short side portion. It is attached.

Now, in the liquid crystal display device 10 according to the present embodiment, as shown in FIG. 5, the second cabinet 14 made of synthetic resin constitutes a part of the backlight device 12, and the second cabinet body 14 a is a reflection sheet. It is possible to support the light guide plate 19 via 20, and since parts such as a metal chassis conventionally used to support the light guide plate 19 are not provided, it is lighter by that amount. And cost reduction. However, since the second cabinet 14 is a resin molded product, it is usually difficult to ensure high rigidity as compared with a metal chassis or other components, and the light guide plate 19 and the reflection sheet 20 can be stably supported. There is concern about disappearing. Here, in the past, in order to improve the rigidity of the resin molded product, a configuration in which grid-like ribs were formed on the flat substrate forming the resin molded product was adopted, but when performing resin molding, The molten resin material flowing in the molding die did not reach the tip side of the rib from the substrate side, and molding defects were likely to occur. In particular, if the rib protrusion dimension from the substrate is increased in order to further improve the rigidity of the resin molded product, the above-mentioned molding defects are more likely to occur, so there is a limit to increasing the rib protrusion dimension. Also, there was a limit to improving the rigidity of the resin molded product by the rib. As described above, in the conventional technique, it has been difficult to achieve both improvement of the rigidity of the resin molded product and suppression of occurrence of molding defects.

Therefore, in the present embodiment, as shown in FIGS. 5, 9, and 11, the second cabinet body 14 a of the second cabinet 14 is disposed relatively close to the liquid crystal panel 11 (the light guide plate 19 and the reflection sheet 20). The first bottom plate portion 22 and the back side of the first bottom plate portion 22, that is, the side away from the liquid crystal panel 11, and the first bottom plate portion 22 are viewed in a plane (normal to the plate surface of the liquid crystal panel 11 It is configured to include at least a second bottom plate portion 23 that is arranged so as to be non-overlapping (viewed from the direction) and a connecting portion 24 that connects the first bottom plate portion 22 and the second bottom plate portion 23. If it does in this way, sufficient rigidity can be ensured compared with the case where the 2nd cabinet body is formed in a flat plate shape. Moreover, even when the second cabinet 14 is resin-molded, the resin material melted in the molding die easily flows between the first bottom plate portion 22 and the second bottom plate portion 23 via the connecting portion 24. ing. Thereby, it is hard to generate | occur | produce a shaping | molding defect and it can aim at the improvement of a good quality rate. Thus, in this embodiment, by making the structure of the 2nd cabinet 14 as mentioned above, improvement in rigidity and suppression of generation | occurrence | production of a molding defect can be made compatible.

As shown in FIGS. 5, 9, and 11, the first bottom plate portion 22 and the second bottom plate portion 23 have plate surfaces parallel to the plate surface of the liquid crystal panel 11 and along the X-axis direction and the Y-axis direction, respectively. It is flat. And the 1st bottom plate part 22 and the 2nd bottom plate part 23 are distribute | arranged to what is distribute | arranged to the thermal radiation member non-overlapping part 14a1 except the metal fitting attachment part 14a3 among the 2nd cabinet main bodies 14a, and the thermal radiation member superimposition part 14a2. The structure is different from the above, the former being a heat radiation non-overlapping first bottom plate part 22A and a heat radiation non-superimposing second bottom plate part 23A, and the latter being a heat radiation superimposing first bottom plate part 22B and a heat radiation superimposing second base plate part 23B. Is done. Moreover, what is distribute | arranged to the metal fitting attachment part 14a3 among the heat radiating member non-overlapping parts 14a1 is the metal fitting superimposition 1st baseplate part 22C and the metal fitting superimposition 2nd baseplate part 23C. In the following description, when the first bottom plate portion 22 and the second bottom plate portion 23 are distinguished from each other, they are disposed on the heat radiation member non-overlapping portion 14a1 excluding the metal fitting mounting portion 14a3 (the heat radiation non-superimposition first bottom plate portion and the heat radiation non-heat radiation portion). The subscript A is added to the reference numeral of the superimposed second bottom plate portion), and the subscript B is added to the reference numerals of the heat radiating member overlapping portion 14a2 (the heat radiating superimposed first bottom plate portion and the heat radiating superimposed second bottom plate portion). 14a3 (the bracket superimposing first bottom plate portion and the bracket superimposing second bottom plate portion) are suffixed with the suffix C, and are collectively referred to without distinction, the suffix is not appended And

First, the heat radiation non-overlapping first bottom plate portion (first bottom plate portion) 22A and the heat radiation non-overlapping second bottom plate portion (second bottom plate portion) 23A arranged in the heat radiation member non-overlapping portion 14a1 will be described. The heat radiation non-overlapping first bottom plate portion 22A and the heat radiation non-overlapping second bottom plate portion 23A have a rectangular shape when viewed in plan so that the planar shape is substantially the same as shown in FIGS. Specifically, the four sides have substantially the same square shape. The heat radiation non-overlapping first bottom plate portion 22A and the heat radiation non-superimposing second bottom plate portion 23A are alternately and repeatedly arranged in the X-axis direction and the Y-axis direction in the plane of the second cabinet body 14a (heat radiation member non-overlapping portion 14a1). They are arranged in a staggered pattern (zigzag) when viewed in plan. Specifically, the heat radiation non-overlapping first bottom plate portion 22A and the heat radiation non-overlapping second bottom plate portion 23A have side portions that are parallel to each other when seen in a plan view, and are adjacent to each other with respect to the X-axis direction and the Y-axis direction across the side portions. It is arranged in a form. More specifically, the first non-overlapping first bottom plate portion 22A is adjacent to the outer peripheral portion of one non-radiating non-overlapping second bottom plate portion 23A (with the four sides forming the outer peripheral portion sandwiched). The four non-overlapping second bottom plate portions 23A are arranged side by side so as to surround the outer peripheral portion of one non-radiating non-overlapping first bottom plate portion 22A. Has been. In other words, the four heat dissipating non-overlapping first bottom plate portions 22A are arranged obliquely adjacent to each other at the four corners with respect to the heat dissipating non-superimposing first bottom plate portion 22A, whereas the heat dissipating non-superimposing operation is not superimposed. Four heat dissipating non-overlapping second bottom plate portions 23A are arranged at positions obliquely adjacent to the second bottom plate portion 23A across the four corners. That is, in the heat radiating member non-overlapping portion 14a1 excluding the bracket mounting portion 14a3, the direction along the diagonal line connecting the corners in the heat radiating non-overlapping first bottom plate portion 22A having a square shape (X-axis direction and Y-axis). A plurality of first non-overlapping first bottom plate portions 22A are arranged along the diagonal direction), and non-radiating non-overlapping is performed along the diagonal line connecting the corners of the non-overlapping second bottom plate portion 23A. A plurality of second bottom plate portions 23A are arranged side by side. Thereby, the external appearance of the 2nd cabinet 14 will exhibit a checkered pattern as a whole.

As shown in FIG. 8, the heat radiation non-overlapping first bottom plate portion 22 A configured as described above has a plate surface facing the front side substantially in contact with the back surface of the reflection sheet 20. It is possible to support the light guide plate 19 from the back side through the gap. On the other hand, the heat radiation non-overlapping second bottom plate portion 23 A is disposed opposite to the reflection sheet 20 at a predetermined interval in the Z-axis direction. Accordingly, in the light guide plate 19 and the reflection sheet 20, a portion that overlaps the heat radiation member non-overlapping portion 14 a 1 excluding the metal fitting mounting portion 14 a 3 in a plane is a plurality of heat radiation non-overlapping firsts arranged in a staggered plane. High flatness is maintained by being supported by the bottom plate portion 22A without deviation in the plane. Further, as shown in FIGS. 5, 9 and 11, the heat radiation non-overlapping first bottom plate portion 22 A is substantially the same as the metal fitting superimposed first bottom plate portion 22 C provided on the metal fitting mounting portion 14 a 3 described later. Although it is flush, it is arranged on the front side (near the liquid crystal panel 11) than the heat radiation superimposed first bottom plate part 22B provided in the heat radiation member overlapping part 14a2. Further, the heat dissipating non-overlapping first bottom plate part 23A has a heat dissipating superimposed second bottom plate part 23B and a metal fitting overlapping second bottom plate part 23C provided on the back surface of the heat dissipating member overlapping part 14a2 and the metal fitting attaching part 14a3, which will be described later. It is almost flat.

Subsequently, the heat radiation non-overlapping connecting portion 24A that connects the heat radiation non-superimposing first bottom plate portion 22A and the heat radiation non-superimposing second bottom plate portion 23A having the above-described configuration will be described. In the following description, when distinguishing the connecting portions 24, the subscript A is added to the reference numerals of the heat dissipating non-overlapping connecting portions disposed in the heat dissipating member non-overlapping portions 14a1 excluding the bracket mounting portion 14a3, and the heat dissipating member overlapping portions 14a2. In the case where the subscript B is added to the reference numeral of the heat radiation superimposing joint portion, the subscript C is attached to the reference numeral of the metal fitting superimposing joint portion arranged in the metal fitting mounting portion 14a3, It shall not be attached. As shown in FIGS. 13 and 14, the heat radiation non-overlapping connecting portion 24A includes a first side wall portion 25 that rises from the side of the heat radiation non-superimposition first bottom plate portion 22A toward the back side, and a heat radiation non-superimposition second bottom plate portion 23A. And a second side wall portion 26 that rises from the side portion toward the front side and has a rising tip portion that is continuous with the rising tip portion of the first side wall portion 25. The heat dissipation non-overlapping connecting portion 24A has a cross-sectional shape that is inclined with respect to the X-axis direction or the Y-axis direction (the plate surfaces of the

bottom plate portions

22A and 23A). The inclination angle with respect to the Y-axis direction is substantially the same as the inclination angle in the second side wall portion 26. Thus, the heat radiation non-overlapping connecting portion 24A extends substantially straight from the side of the heat non-superimposed first bottom plate 22A to the side of the heat non-superimposed second bottom plate 23A without being bent halfway. It is said that. According to such a configuration, when the second cabinet 14 is resin-molded, when the molten resin material is filled in the molding die, the resin material is not dissipated from the heat dissipating non-overlapping first bottom plate portion 22A. Since the fluid flows more smoothly between the two bottom plate portions 23A through the heat radiation non-overlapping joint portion 24A composed of the first side wall portion 25 and the second side wall portion 26 that are inclined together, it becomes more difficult to form defects. . In addition, when the mold is opened after the resin material is solidified, the second cabinet 14 that is a molded product is easily detached from the mold because the heat radiation non-overlapping connecting portion 24A is inclined. It is excellent in productivity. In FIGS. 13 and 14, only the cross-sectional shape of the heat radiation member non-overlapping portion 14a1 cut along the X-axis direction is shown as a representative, but the heat radiation member non-overlapping portion 14a1 is shown along the Y-axis direction. The cut cross-sectional shape is the same as described in FIGS.

As shown in FIGS. 10 and 12, the heat radiation non-overlapping connecting portion 24 A is formed over the entire periphery in each outer peripheral portion of the heat radiation non-superimposing first bottom plate portion 22 A and the heat radiation non-superimposing second bottom plate portion 23 A. That is, the first side wall portion 25 rises from the four side portions forming the outer peripheral portion of each heat dissipating non-overlapping first bottom plate portion 22A, and the adjacent ones are connected to each other, so that the first side wall portion 25 is square in plan view as a whole. It has a short cylindrical shape. A first corner portion 27 is formed between each of the four first side wall portions 25 that are arranged on the four side portions forming the outer peripheral portion of the heat radiation non-overlapping first bottom plate portion 22A and are adjacent to each other. Each first corner 27 has a rounded shape when seen in a plane. The four first side wall portions 25 that are connected to each other via the first corner portions 27 are adjacent to each other so as to surround the outer peripheral portion of the heat radiation non-overlapping first bottom plate portion 22A that the four first side wall portions 25 are connected. It is connected with each of the four second side wall portions 26 that rise from the side portion of the heat radiating non-superimposing second bottom plate portion 23A toward the heat radiating non-superimposing first bottom plate portion 22A. On the other hand, the second side wall portion 26 rises from the four side portions forming the outer peripheral portion of each heat dissipating non-overlapping second bottom plate portion 23 A, and the adjacent ones are connected to each other, so that the second side wall portion 26 is square in a plan view as a whole. It has a short cylindrical shape. A second corner portion 28 is formed between each of the four second side wall portions 26 that are arranged on the four side portions forming the outer peripheral portion of the heat radiating non-overlapping second bottom plate portion 23A and are adjacent to each other. Each second corner portion 28 has a rounded shape when seen in a plan view. The four second side wall portions 26 that are connected to each other via the second corner portions 28 are adjacent to each other so as to surround the outer peripheral portion of the heat radiation non-overlapping second bottom plate portion 23A to which the four second side wall portions 26 are connected. The four first side wall portions 25 rising from the side portions of the heat radiation non-overlapping first bottom plate portion 22A toward the heat radiation non-superimposition second bottom plate portion 23A are connected to each other.

With such a configuration, since the

side wall portions

25 and 26 rising from the outer peripheral portions of the

bottom plate portions

22A and 23B are connected to each other, the rigidity of the second cabinet 14 can be made higher. it can. In addition, when the second cabinet 14 is resin-molded, the molten resin material is, for example, from the first non-overlapping first bottom plate portion 22A to the four first side wall portions 25 formed on the outer peripheral portion thereof. And, through the four second side wall portions 26 connected thereto, it flows radially to the four adjacent heat dissipating non-overlapping second bottom plate portions 23A so as to surround the outer peripheral portion of the heat dissipating non-superimposing first bottom plate portion 22A. become. Similarly, in the molding die, the melted resin material passes from the heat radiation non-overlapping second bottom plate portion 23A through the four second side wall portions 26 formed on the outer peripheral portion thereof and the first side wall portion 25 connected thereto. Thus, it flows radially to the four adjacent heat dissipating non-overlapping first bottom plate portions 22A so as to surround the outer peripheral portion of the heat dissipating non-superimposing second bottom plate portion 23A. Moreover, the four first side wall portions 25 connected to the respective side portions forming the outer peripheral portion of the first non-overlapping first bottom plate portion 22A are connected to each other via the four first corner portions 27, thereby forming an endless annular shape. Therefore, when the second cabinet 14 is resin-molded, the molten resin material flows between the adjacent first side wall portions 25 via the first corner portions 27. Similarly, the four second side wall portions 26 connected to the side portions forming the outer peripheral portion of the heat radiating non-overlapping second bottom plate portion 23A are connected to each other via the four second corner portions 28 to form an endless ring. Therefore, when the second cabinet 14 is resin-molded, the molten resin material flows between the adjacent second side wall portions 26 via the second corner portions 28. As described above, when the second cabinet 14 is resin-molded, the molten resin material flows more smoothly in the molding die, so that it fills every corner of the molding die, resulting in further molding defects. It is considered difficult.

Furthermore, as shown in FIGS. 10, 12, 15, and 16, the heat radiation non-overlapping that is adjacent to each other in the direction along the diagonal line connecting the corners of the

bottom plate portions

22A and 23A having a square shape when seen in a plan view. In the first bottom plate portion 22A, the first corner portions 27 adjacent to each other are formed in a continuous manner. In other words, the first rising from the outer peripheral portion of the two adjacent non-superimposed first bottom plate portions 22A sandwiching the side portions adjacent to each other among the outer peripheral portions of the second non-superimposed second bottom plate portion 23A. Among the side wall portions 25, the first side wall portion 25 that is continuous with each second side wall portion 26 that rises from the outer peripheral portion of the heat radiation non-overlapping second bottom plate portion 23A and the first side wall portion 25 that is adjacent to the first side wall portion 25 are arranged. In addition, the first corner portions 27 adjacent to each other are formed to be continuous with each other. In other words, among the first side wall portions 25 rising from the outer peripheral portions of the four adjacent heat dissipating non-overlapping first bottom plate portions 22A so as to surround the outer peripheral portion of the heat dissipating non-superimposing second bottom plate portion 23A, First corner portions that are arranged between the first side wall portion 25 that continues to each second side wall portion 26 that rises from the outer peripheral portion of the non-overlapping second bottom plate portion 23A and the first side wall portions 25 that are adjacent to each other and that are adjacent to each other. 27 are formed to be continuous. Similarly, the second corner portions 28 adjacent to each other are formed in the second non-overlapping second bottom plate portion 23A adjacent to each other in the direction along the diagonal line in each of the

bottom plate portions

22A and 23A having a square shape when viewed in a plan view. Has been. In other words, the second rising from the outer peripheral portions of the two adjacent non-superimposed second bottom plate portions 23A sandwiching the side portions adjacent to each other among the outer peripheral portions of the first non-superimposed first bottom plate portion 22A. Among the side wall portions 26, the second side wall portions 26 that are connected to the first side wall portions 25 that rise from the outer peripheral portion of the heat radiation non-overlapping first bottom plate portion 22 A and the second side wall portions 26 that are adjacent thereto are arranged. Further, the second corner portions 28 adjacent to each other are formed to be continuous with each other. In other words, among the second side wall portions 26 that stand up from the outer peripheral portions of the four adjacent non-superimposed second bottom plate portions 23A so as to surround the outer peripheral portion of the first non-superimposed first bottom plate portion 22A, the heat dissipation Second corner portions that are arranged between the second side wall portion 26 that continues to each first side wall portion 25 that rises from the outer peripheral portion of the non-overlapping first bottom plate portion 22A and the second side wall portion 26 that is adjacent thereto, and are adjacent to each other. 28 are formed to be continuous. Further, two first corner portions that are respectively provided adjacent to each other in the X-axis direction and the Y-axis direction and that are adjacent to each other in the two non-overlapping first bottom plate portions 22A and the non-overlapping second bottom plate portion 23A. 27 and the second corner portion 28 are connected to each other.

With such a configuration, since the

corner portions

27 and 28 arranged between the

side wall portions

25 and 26 rising from the outer peripheral portions of the

bottom plate portions

22A and 23B, the adjacent ones are connected to each other. The rigidity of the second cabinet 14 can be further increased. Moreover, in the molding die when the second cabinet 14 is resin-molded, the melted resin material passes between the heat-dissipating non-overlapping first bottom plate portions 22A adjacent to each other in the direction along the diagonal line in each of the

bottom plate portions

22A and 23A. The fluid flows through the first corners 27 that are continuous with each other. Similarly, in the molding die, the molten resin material has second corner portions 28 that are continuous with each other between the heat radiation non-overlapping second bottom plate portions 23A adjacent to each other in the direction along the diagonal line in each of the

bottom plate portions

22A and 23A. Will flow through. As a result, when the second cabinet 14 is resin-molded, the molten resin material flows more smoothly in the molding die so that it fills every corner of the molding die, thereby reducing molding defects. It is more difficult to generate.

Next, the heat radiation superimposed first bottom plate portion (first bottom plate portion) 22B and the heat radiation superimposed second bottom plate portion (second bottom plate portion) 23B arranged in the heat radiation member overlapping portion 14a2 will be described. As shown in FIGS. 9 and 11, the heat radiation superimposed first bottom plate portion 22B has a flat plate shape that extends over substantially the entire area of the heat radiation member superimposed portion 14a2 excluding the formation position of the heat radiation superimposed second bottom plate portion 23B. The heat radiation superimposed second bottom plate portion 23B has a square shape in plan view when viewed from above, and specifically has a square shape with substantially the same dimensions on four sides. That is, the heat radiation superimposed second bottom plate portion 23B has substantially the same planar shape as the heat radiation non-superimposed first bottom plate portion 22A and the heat radiation non-superimposed second bottom plate portion 23A. A plurality of the heat radiation superimposed second bottom plate portions 23B are arranged in a staggered pattern in the plane of the heat radiation superimposed first bottom plate portion 22B having a flat plate shape. The planar arrangement is substantially the same as the superimposed second bottom plate portion 23A. That is, a plurality of the heat radiation superimposed second bottom plate portions 23B are arranged side by side along a direction along a diagonal line connecting the corner portions of the heat radiation superimposed second bottom plate portion 23B (an oblique direction with respect to the X axis direction and the Y axis direction). A part of the heat radiation superimposed first bottom plate part 22B is interposed between the heat radiation superimposed second bottom plate parts 23B adjacent to each other in the direction along the diagonal line, and the adjacent heat radiation superimposed second bottom plate parts 23B are directly connected to each other. There are no independent structures. The heat radiation superimposed connecting portion 24B that connects the heat radiation superimposed first bottom plate portion 22B and the heat radiation superimposed second bottom plate portion 23B rises from the four sides forming the outer peripheral portion of the heat radiation superimposed second bottom plate portion 23B toward the front side. Among the two side walls and the heat radiation superimposed first bottom plate part 22B, the four side parts surrounding each heat radiation superimposed second bottom plate part 23B rise from the side toward the back side, and the rising tip is connected to the rising tip of the second side wall. It is comprised from a 1st side wall part. In addition, in the 2nd side wall part connected to each side part of the heat dissipation superimposed 2nd baseplate part 23B which faces the heat dissipation member nonoverlapping part 14a1, the heat dissipation non-overlapping 1st baseplate part adjacent to the said heat dissipation superimposed 2nd baseplate part 23B What is connected to the first side wall portion 25 rising from the side portion of 22A is included. Moreover, the 1st side wall part is also provided in the edge part adjacent to the heat dissipation non-superimposition 2nd bottom plate part 23A among the heat dissipation superimposition 1st baseplate part 22B, The said 1st side wall part is adjacent to the heat dissipation non-superimposition. It is connected with respect to the 2nd side wall part 26 which stands up from the 2nd bottom plate part 23A. In addition, heat radiation holes HR are formed through a part of the plurality of heat radiation superimposed second bottom plate portions 23B arranged in a staggered pattern (see FIGS. 3 and 7).

Subsequently, the metal fitting superimposed first bottom plate portion (first bottom plate portion) 22C and the metal fitting superimposed second bottom plate portion (second bottom plate portion) 23C arranged in the metal fitting mounting portion 14a3 will be described. As shown in FIGS. 9 and 11, the bracket overlapping second bottom plate portion 23 C has a flat plate shape that extends over almost the entire region of the bracket mounting portion 14 a 3 excluding the portion where the bracket overlapping first bottom plate portion 22 C is formed. The bracket overlapping first bottom plate portion 22C has a square shape when viewed in plan, specifically, a square shape having substantially the same dimensions on the four sides and a pair of opposite sides. And a rectangular shape having different dimensions. Among these, the metal fitting superimposing first bottom plate portion 22C having a rectangular shape is intermittently arranged along the three side portions adjacent to the heat radiation member non-superimposing portion 14a1 in the metal fitting superposing second bottom plate portion 23C. Yes. Further, only one square-shaped bracket overlapping first bottom plate portion 22C is disposed at a substantially central position in a side portion of the bracket overlapping second bottom plate portion 23C that is not adjacent to the heat radiating member non-overlapping portion 14a1. The bracket superimposing joint portion 24C that connects the bracket superimposing first bottom plate portion 22C and the bracket superimposing second bottom plate portion 23C rises from the four sides forming the outer periphery of the bracket superimposing second bottom plate portion 23C toward the front side. Among the two side wall portions and the metal fitting superimposed first bottom plate portion 22C, the rising edge portion is raised from each side surrounding the metal fitting overlapping second bottom plate portion 23C toward the back side, and the rising tip portion is continuous with the rising tip portion of the second side wall portion. 1 side wall part. It should be noted that the first side wall portion connected to each side portion of the rectangular metal fitting superimposed first bottom plate portion 22C is adjacent to the rectangular metal fitting superimposed first bottom plate portion 22C and is adjacent to the heat radiation non-overlapping second bottom plate portion 23A. Continuing with respect to the second side wall portion 26 rising from the side portion. In addition, in the bracket overlapping second bottom plate portion 23C, the second side wall portion connected to the side portion facing the heat radiating non-overlapping second bottom plate portion 23A rises from the side portion of the adjacent heat radiating non-superimposing first bottom plate portion 22A. What continues to the side wall part 25 is included.

As described above, the liquid crystal display device (display device) 10 of the present embodiment has a plate-like liquid crystal panel (display component) 11 having a display surface DS for displaying an image and the liquid crystal panel 11 on the display surface DS side. A resin-made second cabinet (cabinet) 14 arranged so as to cover from the opposite side, the first bottom plate portion 22 having a plate surface along the plate surface of the liquid crystal panel 11, and the plate surface of the liquid crystal panel 11. A second bottom plate portion 23 that has a plate surface and is disposed on the side farther from the liquid crystal panel 11 than the first bottom plate portion 22 and is disposed so as not to overlap the first bottom plate portion 22; And a second cabinet 14 having at least a connecting portion 24 connecting the second bottom plate portion 23.

As described above, the second cabinet 14 arranged so as to cover the liquid crystal panel 11 from the side opposite to the display surface DS side includes the first bottom plate portion 22 relatively close to the liquid crystal panel 11 and the liquid crystal panel 11. Since the relatively far second bottom plate portion 23 is arranged so as not to overlap each other and is connected to each other by the connecting portion 24, sufficient rigidity is ensured even if it is made of resin. Yes. Thereby, since it is not necessary to arrange metal parts for ensuring rigidity between the liquid crystal panel 11 and the second cabinet 14, it is possible to achieve weight reduction and cost reduction. And since the 2nd cabinet 14 is set as the structure which connected the 1st bottom plate part 22 and the 2nd bottom plate part 23 with the connection part 24, when resin-molding the 2nd cabinet 14, in a molding die The molten resin material is easy to flow between the first bottom plate portion 22 and the second bottom plate portion 23 via the connecting portion 24. Thereby, it is hard to generate | occur | produce a shaping | molding defect and the improvement of the yield rate is aimed at.

The second cabinet 14 houses a reflection sheet (reflective component) 20 that is disposed on the opposite side of the display surface DS from the liquid crystal panel 11 and reflects light toward the liquid crystal panel 11. The heat radiation non-overlapping first bottom plate portion 22A, which is the first bottom plate portion 22, is arranged in such a manner as to support the reflection sheet 20 from the side opposite to the liquid crystal panel 11 side. Although the second cabinet 14 is made of resin and has sufficient rigidity as described above, the reflection sheet 20 for reflecting the light toward the liquid crystal panel 11 is the first bottom plate portion 22. The heat radiation non-overlapping first bottom plate portion 22A can be stably supported from the side opposite to the liquid crystal panel 11 side. Thereby, since it is not necessary to use components, such as metal chassis, in order to support the reflective sheet 20, weight reduction and cost reduction can be achieved. Moreover, since the reflection sheet 20 is supported by the heat radiating non-overlapping first bottom plate portion 22A, which is the first bottom plate portion 22 of the second cabinet 14, it temporarily rises from the flat plate-like substrate and the surface of the substrate. When a resin molded product composed of lattice-shaped ribs is used, the reflection sheet 20 is scratched compared to the case where the reflection sheet 20 may be damaged by the ribs because burrs are likely to occur at the rib edges. The optical performance of the reflective sheet 20 can be exhibited satisfactorily.

In addition, the second cabinet 14 accommodates an LED (light source) 16 and a light guide plate 19 that is disposed between the liquid crystal panel 11 and the reflection sheet 20 and guides light from the LED 16. The heat radiation non-overlapping first bottom plate portion 22A, which is the first bottom plate portion 22, is arranged in such a manner as to support the light guide plate 19 from the opposite side of the liquid crystal panel 11 via the reflection sheet 20. In this way, the light emitted from the LED 16 is guided by the light guide plate 19 and reflected toward the liquid crystal panel 11 by the reflection sheet 20 to be supplied to the liquid crystal panel 11. In such a configuration, for example, the light guide plate 19 is not provided, and the LED 16 is disposed so as to face the plate surface of the liquid crystal panel 11 and the light of the LED 16 is directly irradiated on the plate surface of the liquid crystal panel 11. Although the liquid crystal display device 10 is being thinned, the rigidity of the second cabinet 14 tends to be insufficient. On the other hand, since the second cabinet 14 has sufficient rigidity as described above, the light guide plate 19 is connected to the first bottom plate portion 22 which is the first bottom plate portion 22 through the reflection sheet 20. Thus, the liquid crystal panel 11 can be stably supported from the opposite side.

The first bottom plate portion 22 and the second bottom plate portion 23 have side portions that are parallel to each other and are arranged adjacent to each other with the side portions interposed therebetween, and the connecting portion 24 is connected to the first bottom plate portion 22. A first side wall portion 25 that rises from the side toward the side opposite to the liquid crystal panel 11 side, and a side wall of the second bottom plate portion 23 that rises from the side portion toward the liquid crystal panel 11 and has a rising tip at the first side wall portion 25. The second side wall portion 26 is connected to the leading end portion of the second side wall portion 26. If it does in this way, the standup tip part of the 1st side wall part 25 and the 2nd side wall part 26 which stand up from each side part in the 1st bottom plate part 22 and the 2nd bottom plate part 23 which will adjoin each other across the mutually parallel side part respectively Since the connection part 24 is comprised by connecting mutually, the rigidity of the 2nd cabinet 14 can be improved suitably. In addition, when the second cabinet 14 is resin-molded, the resin material melted in the molding die is interposed between the first bottom plate portion 22 and the second bottom plate portion 23, and the first side wall portion 25 and the second side wall portion. Since it becomes easy to flow through the connection part 24 which consists of 26, generation | occurrence | production of a molding defect is suppressed suitably.

Also, a plurality of first non-overlapping first bottom plate part 22A, which is the first bottom plate part 22, and a second non-overlapping second bottom plate part 23A, which is the second bottom plate part 23, are adjacent to each other so as to surround each outer peripheral part. The plurality of first side wall portions that are arranged side by side and that stand up from a plurality of sides included in the outer peripheral portion of the first non-overlapping first bottom plate portion 22A that is the first bottom plate portion 22, respectively. 25, and a heat dissipation non-overlapping second bottom plate part 23A, which is a plurality of second bottom plate parts 23 adjacent to the outer peripheral part of the heat dissipation non-overlapping first bottom plate part 22A that is the first bottom plate part 22, A plurality of second side wall portions 26 respectively rising from a plurality of side portions parallel to the plurality of side portions included in the outer peripheral portion of the first heat sink non-overlapping first bottom plate portion 22A that is the first bottom plate portion 22 are connected to the second bottom plate portion 22A. Heat dissipation that is the bottom plate part 23 A plurality of second side wall portions 26 respectively rising from a plurality of sides included in the outer peripheral portion of the superimposed second bottom plate portion 23A, and an outer periphery of the heat radiating non-superimposed second bottom plate portion 23A that is the second bottom plate portion 23 In the first non-overlapping first bottom plate 22A, which is a plurality of first bottom plates 22 that are adjacent to each other so as to surround the portion, a plurality of included in the outer peripheral portion of the second non-overlapping second bottom plate 23A that is the second bottom plate 23 A plurality of first side wall portions 25 rising from a plurality of side portions parallel to the side portions are connected to each other. In this way, the first side wall portion 25 rising from a plurality of side portions included in the outer peripheral portion of the heat radiating non-overlapping first bottom plate portion 22A that is the first bottom plate portion 22 is adjacent so as to surround the outer peripheral portion. The second bottom plate portion 23 A is connected to the second side wall portion 26 rising from each side portion of the heat radiating non-overlapping second bottom plate portion 23 A, which is a plurality of matching second bottom plate portions 23, and is also the second bottom plate portion 23. Each side of the heat radiation non-overlapping first bottom plate portion 22A, which is a plurality of first bottom plate portions 22 adjacent to each other so that the second side wall portion 26 rising from the plurality of side portions included in the outer peripheral portion surrounds the outer peripheral portion. Since the heat radiation non-overlapping joint portion 24A is configured by being connected to the first side wall portion 25 rising from the portion, the rigidity of the second cabinet 14 can be further improved. In addition, when the second cabinet 14 is resin-molded, the resin material melted in the molding die is a plurality of first bottom plate portions 22A that are the first bottom plate portions 22 and a plurality of surrounding portions that surround the outer peripheral portion. The second bottom plate portion 23 flows between the second bottom plate portion 23 A and the heat radiation non-overlapping second bottom plate portion 23 A through a plurality of first side wall portions 25 and second side wall portions 26 that are continuous with each other. A plurality of first side wall portions 25 and a plurality of second side wall portions 25 A connected to each other between the heat radiation non-overlapping second bottom plate portion 23 A and the heat radiation non-overlapping first bottom plate portion 22 A that is a plurality of first bottom plate portions 22 surrounding the outer peripheral portion. By flowing through the side wall portion 26, the fluidity becomes higher, and the occurrence of molding defects is more preferably suppressed.

Further, the first corner portion 27 is formed between the first side wall portions 25 rising from the side portions adjacent to each other in the outer peripheral portion of the heat radiating non-overlapping first bottom plate portion 22A which is the first bottom plate portion 22. On the other hand, the second corner portion 28 is formed between the second side wall portions 26 rising from the adjacent side portions of the outer peripheral portion of the heat radiation non-overlapping second bottom plate portion 23A that is the second bottom plate portion 23, A plurality of first bottom plate portions 22 adjacent to each other in a form surrounding the outer peripheral portion of the second bottom plate portion 23A, which is a non-radiating non-overlapping second bottom plate portion 23A, are provided in each of the first non-overlapping first bottom plate portions 22A. The adjacent first corner portions 27 are connected to each other, and the heat dissipation is a plurality of second bottom plate portions 23 adjacent to each other in the form of surrounding the outer peripheral portion with respect to the heat dissipation non-overlapping first bottom plate portion 22A that is the first bottom plate portion 22. Non-overlapping second bottom plate 23A Between second corner 28 is configured as continuous for Re adjacent Re features and each other, respectively. If it does in this way, the heat radiation non-overlapping first bottom plate part which is the plurality of first bottom plate parts 22 adjacent to the outer peripheral part with respect to the heat radiation non-superimposition second base plate part 23A which is the second bottom plate part 23. The first corner portions 27 provided in each of the 22A are connected to each other adjacent to each other, and adjacent to each other so as to surround the outer peripheral portion of the first bottom plate portion 22A that is the first bottom plate portion 22 with respect to the heat radiation non-overlapping first bottom plate portion 22A. Since the second corner portions 28 respectively provided in the heat radiation non-overlapping second bottom plate portion 23A, which is the second bottom plate portion 23, are adjacent to each other, the rigidity of the second cabinet 14 can be further improved. In addition, when the second cabinet 14 is resin-molded, the resin material melted in the molding die surrounds the outer peripheral portion of the second bottom plate portion 23, which is the heat radiation non-overlapping second bottom plate portion 23 A. The first bottom plate portion 22A, which is a plurality of first bottom plate portions 22 adjacent to each other in a shape, flows between the first bottom plate portions 22A that are continuous with each other, and the first bottom plate portion 22 is a non-heat dissipation non-overlapping second base plate portion 22A. The first bottom plate portion 22A flows between the second non-overlapping second bottom plate portions 23A, which are a plurality of second bottom plate portions 23 adjacent to each other so as to surround the outer peripheral portion thereof, via the second corner portions 28 connected to each other. As a result, the fluidity becomes higher, and the occurrence of molding defects is more preferably suppressed.

The cross-sectional shape of the connecting portion 24 is inclined with respect to the plate surfaces of the first bottom plate portion 22 and the second bottom plate portion 23. In this case, when the second cabinet 14 is resin-molded, the second cabinet 14 that is a molded product is easily detached from the molding die when the molding die is opened, so that the productivity is high. Become.

Further, the heat radiation non-overlapping first bottom plate part 22A as the first bottom plate part 22 and the heat radiation non-overlapping second bottom plate part 23A as the second bottom plate part 23 have the same planar shape. If it does in this way, compared with the case where the planar shape of heat dissipation non-overlapping 1st bottom plate part 22A which is the 1st bottom plate part 22 and heat dissipation non-overlapping 2nd bottom plate part 23A which is the 2nd bottom plate part 23 is made different. When an external force is applied to the second cabinet 14, stress is applied to either the first non-overlapping first bottom plate part 22 A that is the first bottom plate part 22 or the second non-overlapping second bottom plate part 23 A that is the second bottom plate part 23. Since concentration can be avoided, the rigidity of the second cabinet 14 can be improved more suitably. Moreover, the design which concerns on the external appearance of the 2nd cabinet 14 becomes a favorable thing.

Further, the heat radiation non-overlapping first bottom plate part 22A, which is the first bottom plate part 22, and the heat radiation non-superimposing second bottom plate part 23A, which is the second bottom plate part 23, have a square shape in plan view. If it does in this way, since the external appearance of the 2nd cabinet 14 will exhibit a checkered pattern as a whole, it is excellent in design property.

Further, the second cabinet 14 constitutes the appearance of the liquid crystal display device 10. If it does in this way, the design property which concerns on the external appearance of the said liquid crystal display device 10 can be made favorable by the planar shape and arrangement | positioning of the 1st bottom plate part 22 and the 2nd bottom plate part 23. FIG.

Further, the television receiver TV according to this embodiment includes the liquid crystal display device 10 described above. According to such a television receiver TV, the second cabinet 14 provided in the liquid crystal display device 10 is less prone to molding defects and has improved rigidity. In addition, the liquid crystal display device 10 is reduced in weight and cost. Therefore, improvement in productivity, improvement in rigidity, weight reduction, and cost reduction are realized.

<Embodiment 2>
A second embodiment of the present invention will be described with reference to FIGS. In this Embodiment 2, the thing which changed the structure of the thermal radiation member non-overlapping part 114a1 and the thermal radiation member superimposition part 114a2 of the 2nd cabinet 114 is shown. In addition, the overlapping description about the same structure, operation | movement, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

The heat radiation member non-overlapping portion 114a1 of the second cabinet 114 according to the present embodiment has a plurality of heat radiation non-overlapping portions arranged in a staggered manner in the plane of the heat radiation member non-overlapping portion 114a1, as shown in FIGS. The first bottom plate portion 122A, and a heat radiation non-overlapping second bottom plate portion 123A having a flat plate shape extending over almost the whole area of the heat radiation member non-overlapping portion 114a1 excluding the formation position of the heat radiation non-overlapping first bottom plate portion 122A, Yes. Among these, the heat radiation non-overlapping second bottom plate part 123A is arranged on the back side of the heat radiation non-superimposing first bottom plate part 122A, and the heat radiation member superimposing part 114a2 and the bracket mounting part adjacent to the heat radiation member non-superimposing part 114a1. The heat radiation superimposed second bottom plate portion 123B and the metal fitting superimposed second bottom plate portion 123C respectively provided in 114a3 are substantially flush with each other and are connected to each other without a step. The heat radiation member overlapping portion 114a2 includes a plurality of heat radiation superimposed first bottom plate portions 122B arranged in a staggered manner in the plane, and a heat radiation member overlapping portion 114a2 excluding the formation positions of the heat radiation superimposed first bottom plate portions 122B. A heat radiation superimposed second bottom plate portion 123B having a flat plate shape extending over almost the entire area, and the heat radiation superimposed first bottom plate portion 122B and the heat radiation superimposed second bottom plate portion 123B are the same as those described in the first embodiment. The arrangement of is reversed.

As shown in FIGS. 18 and 20, the heat radiation non-overlapping first bottom plate portion 122 A has a square shape when viewed in plan, and specifically has a square shape with substantially the same dimensions on four sides. ing. A plurality of the heat radiation non-overlapping first bottom plate portions 122A are arranged in a staggered pattern in the plane of the heat radiation non-superimposed second bottom plate portion 123A, and the heat radiation superimposing portion 114a2 is provided with a heat radiation superimposition. The planar arrangement is substantially the same as that of the first bottom plate portion 122B. That is, the plurality of first non-overlapping first bottom plate portions 122A are arranged side by side along a direction (diagonal direction with respect to the X-axis direction and the Y-axis direction) along a diagonal line connecting the corner portions of the first bottom plate portion 122A. A part of the second non-overlapping second bottom plate part 123A is interposed between the non-radiating non-overlapping first bottom plate parts 122A adjacent to each other in the direction along the diagonal line, and the adjacent non-radiating non-overlapping first bottom plate parts 122A are mutually connected. They are not directly connected, but are independent structures. The heat radiation non-overlapping first bottom plate part 122A adjacent to the heat radiation member superimposing part 114a2 in the heat radiation member non-superimposing part 114a1 is, as shown in FIGS. 17 and 19, the heat radiation superimposing first bottom plate part provided in the heat radiation member superimposing part 114a2. Planar arrangement is also made in a staggered manner with respect to 122B. Thereby, the external appearance of the 2nd cabinet 114 exhibits the checkered pattern as a whole.

As shown in FIGS. 17 and 19, the heat dissipating non-overlapping second bottom plate part 123 A is provided with the heat dissipating superimposed second bottom plate part provided on the heat dissipating member overlapping part 114 a 2 and the metal fitting attaching part 114 a 3 as described above. 123B and the metal fitting superimposed second bottom plate portion 123C are substantially flush with each other, whereas the heat dissipating non-superimposed first bottom plate portion 122A has a metal fitting superimposed second bottom plate provided on the metal fitting mounting portion 114a3 on the front side. Although substantially flush with the portion 123C, it is arranged on the front side of the heat radiation superimposed first bottom plate portion 122B provided in the heat radiation member overlapping portion 114a2. As shown in FIGS. 21 and 22, the non-heat dissipating non-overlapping first bottom plate part 122A connecting the heat dissipating non-superimposing second bottom plate part 123A and the heat dissipating non-superimposing first bottom plate part 122A, as shown in FIGS. From the four side portions surrounding each heat radiation non-overlapping first bottom plate portion 122A out of the second side wall portion 126 rising from the four side portions forming the front side toward the front side and the heat radiation non-superimposition second bottom plate portion 123A, toward the back side. The first side wall portion 125 that rises and the rising tip portion thereof is connected to the rising tip portion of the second side wall portion 126. As shown in FIGS. 18 and 20, the second side wall 126 connected to each of the four sides forming the outer peripheral portion of the first non-overlapping first bottom plate 122A is connected to the second side wall 126 as shown in FIGS. Corner portions 128 are arranged. The second corners 128 adjacent to each other in the first non-overlapping first bottom plate portion 122A adjacent to each other along the diagonal line connecting the corners of the first non-overlapping first bottom plate portion 122A having a square shape when viewed in a plane are 23, the heat radiation non-overlapping second bottom plate portion 123A and the first corner portion 127 that rises from the side portion and is disposed between the first side wall portions 125 adjacent to each other are connected. In addition, as shown in FIGS. 18, 20 and 24, the heat radiation non-overlapping first bottom plate portion 122A has a portion surrounded by a heat radiation non-superimposition second bottom plate portion 123A arranged in a staggered manner in a non-heat radiation non-overlapping manner. It has a square shape with the same dimensions as the second bottom plate portion 123A, and these square portions are arranged between the non-radiating non-overlapping second bottom plate portions 123A arranged in an oblique direction (a direction along the diagonal line). It is connected without a step by part.

As described above, the heat dissipating member non-overlapping portion 114a1 is configured by connecting the heat dissipating non-superimposing first bottom plate portion 122A and the heat dissipating non-superimposing second bottom plate portion 123A by the heat dissipating non-superimposing connecting portion 124A. The heat dissipation non-overlapping connecting portion 124A can be formed between the first non-superimposed first bottom plate portion 122A and the non-superimposed second bottom plate portion 123A in the molding die even during resin molding. Therefore, it is difficult for molding defects to occur due to the resin material flowing appropriately.

<Embodiment 3>
A third embodiment of the present invention will be described with reference to FIGS. This Embodiment 3 shows what changed the magnitude | size etc. of heat dissipation non-overlapping 1st baseplate part 222A and heat dissipation non-superimposition 2nd baseplate part 223A from Embodiment 1 mentioned above. In addition, the overlapping description about the same structure, operation | movement, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

The heat radiation non-overlapping first bottom plate 222A and the heat radiation non-superimposing second bottom plate 223A provided in the heat radiation member non-overlapping part 214a1 of the second cabinet 214 according to the present embodiment are arranged on the front side as shown in FIGS. Although the areas of the facing plate surfaces are different, the areas of the plate surfaces facing the back side are equal. Specifically, the heat radiation non-overlapping first bottom plate part 222A has a plate surface area facing the front side larger than the same area of the heat radiation non-superimposition second bottom plate part 223A, but the plate surface area facing the back side is larger. The same area as that of the heat radiating non-overlapping second bottom plate portion 223A is assumed to be substantially the same.

More specifically, for example, from the side along the Y-axis direction of the first non-overlapping first bottom plate 222A of the non-overlapping first bottom plate 222A and the non-overlapping second bottom plate 223A arranged along the Y-axis direction. As shown in FIGS. 27 to 30, the first side wall portion 225 that rises has a rising base end portion that rises from a side portion along the Y-axis direction of the second non-overlapping second bottom plate portion 223 A adjacent in the Y-axis direction. The second side wall portion 226 is disposed at a position (outside position) farther from the center of the heat dissipating non-overlapping first bottom plate portion 222A than the rising base end portion. This relationship is the same for the

side wall portions

225 and 226 that rise from the side portions along the X-axis direction in the heat dissipation non-overlapping first bottom plate portion 222A and the heat dissipation non-overlap second bottom plate portion 223A arranged along the X-axis direction. . Thereby, the edge part which faces the front side of the rising base end part of the first side wall part 225 has the heat radiation non-overlapping first bottom plate more than the edge part which faces the front side of the rising base end part of the second side wall part 226. Since it is arranged at a position far from the center of the portion 222A, the dimension O1 of each side of the heat dissipation non-overlapping first bottom plate portion 222A viewed from the front side is equal to each of the heat dissipation non-overlapping second bottom plate portions 223A viewed from the front side. While being larger than the side dimension O2, the area of the plate surface facing the front side in the heat dissipation non-overlapping first bottom plate part 222A is larger than the same area of the heat dissipation non-overlapping second bottom plate part 223A. Accordingly, the light guide plate and the reflection sheet (not shown) placed on the surface facing the front side in the heat radiating non-overlapping first bottom plate portion 222A are supported by the heat radiating non-superimposing first bottom plate portion 222A (support range). Therefore, stable support is achieved, and higher flatness is maintained. On the other hand, the edge that faces the back side of the rising base end portion of the first side wall portion 225 includes the edge portion that faces the back side of the rising base end portion of the second side wall portion 226 and the heat radiation non-overlapping first bottom plate portion. Since the distance from the center of 222A is almost equal, the dimension R1 of each side of the heat radiation non-overlapping first bottom plate part 222A viewed from the back side and the heat radiation non-overlapping second bottom plate part viewed from the back side The dimension R2 of each side of 223A is substantially the same, and the area of the plate surface facing the back side in the heat radiation non-overlapping first bottom plate part 222A and the same area of the heat radiation non-superimposition second bottom plate part 223A are substantially the same. It has become. And since the 2nd cabinet 214 concerning this embodiment comprises the appearance of the back side of a liquid crystal display device and a television receiver, as mentioned above, heat dissipation non-overlapping 1st baseplate part 222A and heat dissipation non-overlaying 2nd bottom plate By making the area of the plate surface on the back side of the portion 223A the same, the appearance design of the liquid crystal display device and the television receiver can be further enhanced.

<Embodiment 4>
A fourth embodiment of the present invention will be described with reference to FIG. 31 or FIG. In this Embodiment 4, what changed the cross-sectional shape in the location where each corner |

angular part

327 and 328 continued from Embodiment 1 mentioned above is shown. In addition, the overlapping description about the same structure, operation | movement, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

As shown in FIG. 31, the first corner portion 327 according to the present embodiment is continuous with the adjacent first corner portion 327 and has a substantially arcuate cross-sectional shape. Similarly, as shown in FIG. 32, the second corner portion 328 is continuous with the adjacent second corner portion 328 and has a substantially arc shape in cross section. Even if it is such a structure, when resin-molding the 2nd cabinet, the mold opening of a shaping die can be performed easily.

<Embodiment 5>
A fifth embodiment of the present invention will be described with reference to FIG. In the fifth embodiment, the planar shape of the heat radiation non-overlapping first bottom plate portion 422A and the heat radiation non-superimposition second bottom plate portion 423A is changed from the above-described first embodiment. In addition, the overlapping description about the same structure, operation | movement, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

The heat radiation non-overlapping first bottom plate portion 422A and the heat radiation non-superimposing second bottom plate portion 423A according to the present embodiment have a horizontally long rectangular shape as shown in FIG. The heat radiation non-overlapping first bottom plate part 422A and the heat radiation non-superimposing second bottom plate part 423A are formed such that the long side direction thereof coincides with the X-axis direction and the short side direction thereof coincides with the Y-axis direction. That is, the heat radiation non-overlapping first bottom plate part 422A and the heat radiation non-superimposition second bottom plate part 423A have the long side parallel to the long side of the second cabinet 414 and the short side parallel to the short side of the second cabinet 414. Yes. Although the second cabinet 414 having a horizontally long rectangular shape tends to be easily deformed such as bending or warping along the short side thereof, the heat radiation non-overlapping first bottom plate portion 422A and the heat radiation non-superimposing second bottom plate portion 423A are the same. Therefore, the second cabinet 414 is less likely to be deformed such as bending or warping along its short side. Accordingly, the rigidity of the second cabinet 414 can be further increased.

As described above, according to the present embodiment, the second cabinet 414 has a rectangular planar shape, and the first bottom plate portion is a heat radiation non-overlapping first bottom plate portion 422A and the second bottom plate portion is a heat radiation. The non-overlapping second bottom plate portion 423 A is arranged such that the planar shape is rectangular and the long side thereof is parallel to the long side of the second cabinet 414. Although the second cabinet 414 having a rectangular planar shape tends to be easily deformed such as bending and warping along its short side, the first bottom plate portion 422A and the first bottom plate portion 422A, which are the first bottom plate portions, and the second bottom plate portion 414A. The planar shape of the heat radiation non-overlapping second bottom plate portion 423A that is the two bottom plate portions is rectangular and the long side thereof is arranged in parallel with the long side of the second cabinet 414, so that the second cabinet 414 Deformation such as bending and warping along the short side is difficult to occur. Thereby, the rigidity of the 2nd cabinet 414 can be improved more suitably.

<Embodiment 6>
A sixth embodiment of the present invention will be described with reference to FIG. In the sixth embodiment, the planar shape of the heat radiation non-overlapping first bottom plate portion 522A and the heat radiation non-superimposition second bottom plate portion 523A is changed from the above-described first embodiment. In addition, the overlapping description about the same structure, operation | movement, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

34. As shown in FIG. 34, the heat radiation non-overlapping first bottom plate portion 522A and the heat radiation non-superimposing second bottom plate portion 523A according to the present embodiment have a rhombus shape as shown in FIG. Specifically, in the heat dissipation non-overlapping first bottom plate part 522A and the heat dissipation non-overlapping second bottom plate part 523A, the respective side portions forming the respective outer peripheral portions are inclined with respect to the X-axis direction and the Y-axis direction. Therefore, the heat radiation non-superimposing first bottom plate portion 522A and the heat radiation non-superimposing second bottom plate portion 523A are alternately arranged along the oblique direction along each side portion. On the other hand, the plurality of heat dissipating non-overlapping first bottom plate portions 522A adjacent to each other are arranged side by side in a row along the X-axis direction and the Y-axis direction, and a plurality of heat dissipating non-overlapping second bases adjacent to each other. The bottom plate portions 523A are arranged side by side in a row along the X-axis direction and the Y-axis direction. The heat dissipating non-overlapping first bottom plate part 522A and the heat dissipating non-superimposing second bottom plate part 523A form a horizontally long rhombus when viewed in a plane, and the lengths of the diagonal lines connecting the vertices facing each other in the X-axis direction face each other in the Y-axis direction. It is longer than the length of the diagonal line connecting the vertices.

<Embodiment 7>
A seventh embodiment of the present invention will be described with reference to FIG. This Embodiment 7 shows what changed the planar shape of the heat radiation non-overlapping first bottom plate part 622A and the heat radiation non-overlapping second bottom plate part 623A from the above-described Embodiment 1. In addition, the overlapping description about the same structure, operation | movement, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

As shown in FIG. 35, the heat radiation non-overlapping first bottom plate portion 622A and the heat radiation non-superimposing second bottom plate portion 623A according to the present embodiment are both trapezoidal, specifically, isosceles trapezoidal as shown in FIG. . Specifically, in the heat radiation non-overlapping first bottom plate portion 622A and the heat radiation non-overlapping second bottom plate portion 623A, the pair of side portions serving as the bottom side are parallel to the X-axis direction, whereas the pair of side portions forming the legs are the X-axis. It is arranged to be inclined with respect to the direction and the Y-axis direction. The heat radiation non-overlapping first bottom plate portion 622A and the heat radiation non-superimposing second bottom plate portion 623A are alternately arranged along the X-axis direction and the Y-axis direction. Are arranged along the X-axis direction, but are arranged so as to be adjacent to each other along the legs. The heat radiation non-overlapping first bottom plate portion 622A and the heat radiation non-overlapping second bottom plate portion 623A arranged along the Y-axis direction have a symmetrical shape with a side portion interposed therebetween as a symmetry axis.

<Embodiment 8>
An eighth embodiment of the present invention will be described with reference to FIG. In the eighth embodiment, the planar shape of the heat radiation non-overlapping first bottom plate portion 722A and the heat radiation non-superimposition second bottom plate portion 723A is changed from the above-described first embodiment. In addition, the overlapping description about the same structure, operation | movement, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

36. As shown in FIG. 36, the heat radiation non-overlapping first bottom plate portion 722A and the heat radiation non-superimposing second bottom plate portion 723A according to the present embodiment have a parallelogram shape as shown in FIG. Specifically, in the heat radiation non-overlapping first bottom plate part 722A and the heat radiation non-superimposition second bottom plate part 723A, the sides forming the opposite side of one set are parallel to the X-axis direction, whereas the sides forming the opposite side of the other set The portions are arranged so as to be inclined with respect to the X-axis direction and the Y-axis direction. The heat dissipating non-overlapping first bottom plate part 722A and the heat dissipating non-overlapping second bottom plate part 723A are arranged side by side along the opposite side of one set, that is, along the X-axis direction, and the other set They are arranged alternately along the opposite side, that is, along the direction inclined with respect to the X-axis direction and the Y-axis direction.

<Ninth Embodiment>
A ninth embodiment of the present invention will be described with reference to FIG. In the ninth embodiment, the planar shape of the first non-overlapping first bottom plate 822A and the second non-superimposed second bottom plate 823A is changed from the first embodiment. In addition, the overlapping description about the same structure, operation | movement, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

37. As shown in FIG. 37, the heat radiation non-overlapping first bottom plate portion 822A and the heat radiation non-superimposing second bottom plate portion 823A according to the present embodiment have a triangular shape, specifically an equilateral triangle shape, as shown in FIG. Specifically, in the heat radiation non-superimposing first bottom plate portion 822A and the heat radiation non-superimposition second bottom plate portion 823A, one side portion is parallel to the X-axis direction, while the remaining two side portions are the X-axis direction and the Y-axis. It is arranged so as to be inclined with respect to the direction. The heat dissipating non-overlapping first bottom plate portion 822A and the heat dissipating non-superimposing second bottom plate portion 823A are arranged alternately along the X-axis direction and the Y-axis direction, respectively, in addition to the X-axis direction and the Y-axis. They are alternately arranged along two sides that are inclined with respect to the direction. The heat radiation non-overlapping first bottom plate portion 822A and the heat radiation non-overlapping second bottom plate portion 823A arranged along the X-axis direction are adjacent to each other with side portions that are inclined with respect to the X-axis direction and the Y-axis direction. . The heat radiation non-overlapping first bottom plate portion 822A and the heat radiation non-overlapping second bottom plate portion 823A arranged along the Y-axis direction are adjacent to each other across the apex formed by the side portion parallel to the X-axis direction or the remaining two side portions. ing. That is, the first non-superimposed first bottom plate portion 822A and the second non-superimposed second bottom plate portion 823A that are arranged along the Y-axis direction and are parallel to the X-axis direction are interposed between the X-axis and the X-axis. It arrange | positions so that the symmetrical part which makes the side part parallel to a direction a symmetry axis may be made. Further, the heat radiation non-overlapping first bottom plate portion 822A and the heat radiation non-overlapping second bottom plate portion 823A arranged along the side portions inclined with respect to the X-axis direction and the Y-axis direction are in the X-axis direction and the Y-axis direction. On the other hand, they are adjacent to each other across an inclined side portion.

<Embodiment 10>
A tenth embodiment of the present invention will be described with reference to FIG. This Embodiment 10 shows what changed the planar shape of heat dissipation non-superimposition 1st baseplate part 922A and heat dissipation non-superimposition 2nd baseplate part 923A from above-mentioned Embodiment 1. FIG. In addition, the overlapping description about the same structure, operation | movement, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

As shown in FIG. 38, the heat radiation non-overlapping first bottom plate portion 922A and the heat radiation non-superimposition second bottom plate portion 923A according to the present embodiment are triangular in shape, as shown in FIG. Is an equilateral triangle, but its planar arrangement is different from that of the ninth embodiment. That is, the heat radiation non-overlapping first bottom plate portion 922A and the heat radiation non-overlapping second bottom plate portion 923A are arranged in a plurality of rows in a row along the Y-axis direction, and a plurality of the heat radiation non-superimposition second bottom plate portions 923A are arranged along the Y-axis direction. The heat radiation non-overlapping first bottom plate portions 922A and the plurality of heat radiation non-superimposition second bottom plate portions 923A arranged along the Y-axis direction are arranged alternately in the X-axis direction. The plurality of heat dissipating non-overlapping first bottom plate portions 922A that are arranged in a line along the Y-axis direction are adjacent to each other with a side portion parallel to the X-axis direction and a vertex formed by the remaining two side portions. . Similarly, the plurality of heat dissipating non-overlapping second bottom plate portions 923A arranged in a row along the Y-axis direction are adjacent to each other with a side portion parallel to the X-axis direction and a vertex formed by the remaining two side portions. Matching. The heat dissipating non-overlapping first bottom plate portion 922A included in the row aligned along the Y-axis direction and the heat dissipating non-superimposing second bottom plate portion 923A included in the row adjacent to the row in the X-axis direction are mutually X-axis They are arranged adjacent to each other in the Y-axis direction across a part of the side portions along the direction. Further, the heat radiation non-overlapping first bottom plate portion 922A and the heat radiation non-superimposition second bottom plate portion 923A are alternately arranged along the X-axis direction, and the heat radiation non-superimposition first bottom plate portion 922A and the heat radiation non-superimposition first bottom plate portion 922A are adjacent to each other. Between the non-overlapping second bottom plate portion 923A, side portions that are inclined with respect to the X-axis direction and the Y-axis direction are interposed.

<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 embodiments described above, the liquid crystal display device provided with the edge light type backlight device has been exemplified. However, the present invention can also be applied to a liquid crystal display device provided with a direct type backlight device. In this case, the direct type backlight device covers the second cabinet, the LED substrate (light source substrate) having a plate surface parallel to the plate surface of the cabinet body of the second cabinet, and the front plate surface of the LED substrate. And at least a reflection sheet (reflection component) laid inside the second cabinet. Preferably, a plurality of LED substrates are arranged side by side in the plane of the cabinet body, and are directly supported from the back side by a first bottom plate portion (a first non-overlapping first bottom plate portion) provided in the cabinet body. Note that the LED mounted on the LED substrate has a light emitting surface facing the optical sheet and the liquid crystal panel.

(2) In addition to the above-described embodiments, the specific planar shapes of the heat radiation non-overlapping first bottom plate part and the heat radiation non-superimposing second bottom plate part can be appropriately changed. For example, the planar shape of the heat radiation non-overlapping first bottom plate part and the heat radiation non-superimposition second bottom plate part is a vertically long rectangular shape (a rectangle whose side dimension along the X-axis direction is shorter than the side dimension along the Y-axis direction). Shape), non-isosceles trapezoid, vertically long rhombus (diamond whose length of the diagonal line connecting the opposite vertices in the X-axis direction is shorter than the length of the diagonal line connecting the opposite vertices in the Y-axis direction), diagonal line connecting the opposite vertices It is possible to use a rhombus having the same length, a quadrilateral with different dimensions on all sides, an isosceles triangle, a triangle with different dimensions on all sides, or the like. The point is that the planar shape of the heat radiation non-superimposing first bottom plate part and the heat radiation non-superimposing second bottom plate part can be appropriately changed as long as so-called plane filling is possible, and may be a pentagon or more polygon. . Further, the planar shape of the heat radiating member non-overlapping portion can be changed as appropriate, such as a square or a vertically long rectangle.

(3) In each of the above-described embodiments, the case where the planar shapes of the heat radiation non-overlapping first bottom plate part and the heat radiation non-superimposition second bottom plate part are the same is shown. It is also possible to make the planar shape different between the two bottom plate portions. Even in that case, the planar shapes of the heat radiation non-overlapping first bottom plate part and the heat radiation non-superimposing second bottom plate part can be appropriately changed as long as so-called plane filling is possible.

(4) In each of the above-described embodiments, the planar shape of all the non-heat dissipating non-overlapping first bottom plate portions is the same, and the planar shape of all the heat dissipating non-superimposing second bottom plate portions is the same. However, it is also possible to have a configuration in which a plurality of types of heat radiation non-overlapping first bottom plate portions having different planar shapes are mixed, or a configuration in which a plurality of types of heat radiation non-overlapping second bottom plate portions having different planar shapes are mixed. Even in that case, the planar shapes of the heat radiation non-overlapping first bottom plate part and the heat radiation non-superimposing second bottom plate part can be appropriately changed as long as so-called plane filling is possible.

(5) In each of the above embodiments, the LED unit provided with the heat radiating member is illustrated, but the LED unit may not be provided with the heat radiating member, and may be configured only by the LED and the LED substrate. In that case, since the cabinet main body of the second cabinet becomes the heat radiating member non-overlapping portion over the entire region, the heat radiating non-superimposing first bottom plate portion is distributed over almost the entire region of the cabinet main body, and the heat radiating non-superimposing first bottom plate. The reflective sheet can be supported directly from the back side over almost the entire area by the portion.

(6) In the above-described embodiments, the cover member is attached so as to cover a part of the second cabinet. However, the cover member may be attached so as to cover the entire area of the second cabinet. The present invention is also applicable. In that case, the second cabinet does not constitute an appearance member of the liquid crystal display device.

(7) In each of the above-described embodiments, the cover member is shown attached to the back side of the second cabinet, but the cover member may be omitted. In addition, it is possible to adopt a configuration in which a metal fitting for increasing the degree of freedom of the installation mode of the liquid crystal display device is not attached to the back side of the second cabinet (a configuration in which the metal fitting is omitted). The heat dissipating member non-overlapping portion provided in the cabinet main body of the cabinet is not provided with the metal fitting attaching portion.

(8) In each of the above-described embodiments, in the bracket mounting portion provided in the cabinet body of the second cabinet, the first bracket overlapping first base plate that is square when viewed in plan and the first bracket that is rectangular when viewed from the plane. The bottom plate portion is illustrated as an example. However, for example, the bracket mounting portion has a configuration in which only the square-shaped bracket overlapping first bottom plate portion is provided, or conversely only the rectangular bracket overlapping first bottom plate portion is provided. It is also possible to adopt a configuration provided with. Further, in each of the above-described embodiments, the bracket mounting portion is illustrated as a rectangle when viewed in plan as a whole. For example, if the planar shape of the bracket to be mounted is square, the bracket mounting portion is viewed in plane. Of course, a square shape is also possible. In addition to the above, the planar shape of the bracket mounting portion and the bracket overlapping first bottom plate portion can be appropriately changed. Similarly, the planar shapes of the heat radiation member overlapping portion, the heat radiation superimposed first bottom plate portion, and the heat radiation superimposed second bottom plate portion can be appropriately changed.

(9) Besides the above-described embodiments, the cross-sectional shape and the arrangement of the rising base end portion of the first side wall portion connected to the heat radiation non-overlapping first bottom plate portion and the second side wall portion continuous to the heat radiation non-overlapping second bottom plate portion These can be changed as appropriate.

(10) With respect to the first non-overlapping first bottom plate portion described in the second embodiment, the specific planar shape can be changed as appropriate, for example, a circular shape, an elliptical shape, or the like. In short, in the configuration described in the second embodiment, the planar shape of the first non-overlapping first bottom plate portion can be made so as to be capable of plane filling alone, but cannot be filled alone. It is also possible.

(11) The configurations described in Embodiments 5 to 10 can be appropriately combined with the configurations described in Embodiments 2 to 4.

(12) The configuration described in the fourth embodiment may be combined with the configuration described in the third embodiment.

(13) In each of the above-described embodiments, the second cabinet is made of synthetic resin, but the second cabinet is made of natural resin. As the natural resin material, a plant-derived material, an animal-derived material, a mineral-derived material, or the like can be used.

(14) In each of the above-described embodiments, the one in which one end surface on the short side of the outer peripheral end surface of the light guide plate is a light incident surface facing the LED is shown. A device in which the LED unit is arranged so that the end surface is a light incident surface is also included in the present invention. In addition to this, the LED unit may be arranged such that both end surfaces on the short side or both end surfaces on the long side of the light guide plate are respectively light incident surfaces. Furthermore, you may arrange | position an LED unit so that arbitrary three end surfaces or all four end surfaces in a light-guide plate may become a light-incidence surface.

(15) In each of the above-described embodiments, a transmissive liquid crystal display device including a backlight device that is an external light source has been illustrated. It is also applicable to a transflective (reflection / transmission type) liquid crystal display device having both functions of reflection display that performs display using external light.

(16) In each of the embodiments described above, the color part of the color filter included in the liquid crystal panel is exemplified as three colors of R, G, and B. However, the color part may be four or more colors.

(17) In each of the above-described embodiments, the TFT is used as a switching element of the liquid crystal display device. 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.

(18) In each of the above-described embodiments, the case where the liquid crystal display device and the second cabinet have a horizontally long rectangular shape is shown, but a vertically long rectangular shape or a square shape is also included in the present invention.

(19) In each of the above-described embodiments, the liquid crystal display device including the liquid crystal panel and the backlight device has been exemplified. However, the present invention can also be applied to a display device having no backlight device. Specifically, the present invention can be applied to an organic EL display device including an organic EL panel as a self-luminous display panel, a plasma display device including a plasma display panel as a self-luminous display panel, and the like. In this case, the organic EL panel or the plasma display panel is supported from the back side directly or via another member by the second cabinet.

(20) 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. Specifically, the present invention can also be applied to a liquid crystal display device used as an electronic signboard (digital signage) or an electronic blackboard.

DESCRIPTION OF SYMBOLS 10 ... Liquid crystal display device (display device), 11 ... Liquid crystal panel (display component), 14, 114, 214, 414 ... 2nd cabinet (cabinet), 16 ... LED (light source), 19 ... Light guide plate, 20 ... Reflection sheet (Reflective parts), 22 ... 1st bottom plate part, 22A, 122A, 222A, 322A, 422A, 522A, 622A, 722A, 822A, 922A ... 1st bottom plate part (first bottom plate part), 22B, 122B ... Heat radiation superimposed first bottom plate portion (first bottom plate portion), 22C, 122C ... metal fitting superimposed first bottom plate portion (first bottom plate portion), 23 ... second bottom plate portion, 23A, 123A, 223A, 323A, 423A, 523A, 623A , 723A, 823A, 923A ... heat radiation non-overlapping second bottom plate part (second bottom plate part), 23B, 123B ... heat radiation superimposed second bottom plate part (second bottom plate part), 23C, 12 C ... metal fitting overlapping second bottom plate portion (second bottom plate portion), 24 ... connecting portion, 24A, 124A ... heat dissipation non-overlapping connecting portion (connecting portion), 24B ... heat dissipation superimposing connecting portion (connecting portion), 24C ... metal fitting overlapping connecting Part (joint part), 25, 125, 225 ... first side wall part, 26, 126, 226 ... second side wall part, 27, 127, 327 ... first corner part, 28, 128, 328 ... second corner part, DS ... Display surface, TV ... TV receiver

Claims

A plate-like display component having a display surface for displaying an image;
A resin-made cabinet arranged so as to cover the display component from the side opposite to the display surface side, a first bottom plate portion having a plate surface along a plate surface of the display component, and a plate of the display component A second bottom plate that has a plate surface along the surface and is disposed on a side farther from the display component than the first bottom plate portion and is adjacent to the first bottom plate portion in a direction along the plate surface. And a cabinet having at least a connecting portion that connects the first bottom plate portion and the second bottom plate portion.
The cabinet contains a reflective component that is disposed on the opposite side of the display surface with respect to the display component and reflects light toward the display component,
2. The display device according to claim 1, wherein the first bottom plate portion is disposed in such a manner as to support the reflective component from a side opposite to the display component side.
The cabinet contains the light source and a light guide plate that is arranged in a form interposed between the display component and the reflective component and guides light from the light source,
3. The display device according to claim 2, wherein the first bottom plate portion is arranged so as to support the light guide plate from the side opposite to the display component side through the reflective component.
The first bottom plate portion and the second bottom plate portion have side portions parallel to each other and are arranged adjacent to each other with the side portions interposed therebetween,
The connecting portion includes a first side wall portion that rises from the side portion of the first bottom plate portion toward the side opposite to the display component side, and a direction from the side portion of the second bottom plate portion toward the display component side. 4. The display device according to claim 1, wherein the display device includes a second side wall portion that rises and a rising tip portion that is continuous with a rising tip portion of the first side wall portion. 5.
The first bottom plate portion and the second bottom plate portion are arranged side by side so as to be adjacent to each other so as to surround each outer peripheral portion,
The connecting portion surrounds the plurality of first side wall portions rising from the plurality of side portions included in the outer peripheral portion of the first bottom plate portion and the outer peripheral portion with respect to the first bottom plate portion. A plurality of second side wall portions respectively rising from a plurality of the side portions parallel to the plurality of side portions included in the outer peripheral portion of the first bottom plate portion, in the plurality of second bottom plate portions adjacent in form. And a plurality of the second side wall portions respectively rising from the plurality of side portions included in the outer peripheral portion of the second bottom plate portion and surrounding the outer peripheral portion with respect to the second bottom plate portion. And a plurality of first side wall portions respectively rising from a plurality of side portions parallel to the plurality of side portions included in the outer peripheral portion of the second bottom plate portion. It is a series of configurations Display device according to claim 4.
A first corner is formed between the first side walls rising from the adjacent side portions of the outer peripheral portion of the first bottom plate portion, whereas the outer periphery of the second bottom plate portion. A second corner portion is formed between the second side wall portions rising from the side portions adjacent to each other among the portions,
The plurality of first bottom plate portions adjacent to each other so as to surround the outer peripheral portion with respect to the second bottom plate portion, and the first corner portions adjacent to each other are connected to each other, and with respect to the first bottom plate portion The display device according to claim 5, wherein the second corner portions adjacent to each other are provided in a plurality of adjacent second bottom plate portions so as to surround the outer peripheral portion, and the second corner portions are adjacent to each other.
The display device according to any one of claims 1 to 6, wherein a cross-sectional shape of the connecting portion is inclined with respect to the plate surfaces of the first bottom plate portion and the second bottom plate portion.
The display device according to any one of claims 1 to 7, wherein the first bottom plate portion and the second bottom plate portion have the same planar shape.
The display device according to claim 8, wherein the first bottom plate portion and the second bottom plate portion have a square shape in plan view.
The cabinet has a rectangular planar shape,
The display device according to claim 8, wherein the first bottom plate portion and the second bottom plate portion are arranged such that a planar shape is a rectangle and a long side thereof is parallel to a long side of the cabinet.
The display device according to any one of claims 1 to 10, wherein the cabinet constitutes an appearance of the display device.
A television receiver comprising the display device according to any one of claims 1 to 11.
A first bottom plate portion, a plate surface along the plate surface of the first bottom plate portion, and spaced from the first bottom plate portion in the plate thickness direction, and with respect to the first bottom plate portion; A cabinet comprising at least a second bottom plate portion that is arranged adjacent to each other in a direction along the plate surface, and a connecting portion that connects the first bottom plate portion and the second bottom plate portion.