JP6699678B2 - Display device - Google Patents

Description

  The present invention relates to a display device for displaying an image.

  As a display device for displaying an image, for example, a liquid crystal television receiver is known. A liquid crystal television receiver includes a backlight unit that irradiates light toward the back surface of a liquid crystal cell (see, for example, Patent Document 1). The backlight unit includes, for example, a direct-type backlight unit in which a light source is arranged directly below a liquid crystal cell. The direct type backlight unit includes a wiring board, a plurality of LEDs (Light Emitting Diodes) mounted on the surface of the wiring board, and a light for reflecting light from each of the plurality of LEDs toward the back surface of the liquid crystal cell. And a reflection sheet.

  In the conventional direct type backlight unit, the wiring board is fixed to the rear frame by a double-sided adhesive tape. The double-sided adhesive tape is attached to the entire back surface of the wiring board. The reflection sheet is attached to the rear frame so as to cover the wiring board. At this time, the plurality of LEDs mounted on the wiring board are exposed through the plurality of holes provided in the reflection sheet.

  Further, in the conventional direct type backlight unit, a holder for suppressing the bending of the reflection sheet is used. This holder has a holding portion and a sandwiching portion. The holding section holds the reflection sheet from the liquid crystal cell side, and the sandwiching section penetrates the reflection sheet to sandwich the wiring board from the lateral direction, whereby the reflection sheet and the wiring board are fixed to each other. This suppresses the reflection sheet from bending toward the liquid crystal cell side.

JP, 2010-210891, A

  However, the conventional display device described above has the following problems. The holding portion of the holder described above largely projects from the surface of the reflection sheet to the liquid crystal cell side. Therefore, it is necessary to dispose the LED sufficiently away from the holder so that the holder does not block part of the light from the LED. As a result, there arises a problem that the degree of freedom of the optical layout when arranging a plurality of LEDs is reduced. Further, the use of the above-mentioned holder causes a problem that the manufacturing cost of the display device increases by the amount of the holder.

  The present invention is intended to solve the above-described problems, and an object thereof is to provide a display device capable of increasing the degree of freedom of an optical layout when arranging a light source and reducing the manufacturing cost. It is to be.

  In order to achieve the above object, a display device according to one embodiment of the present invention is a display device for displaying an image, and is a display panel for displaying the image, and a display panel arranged on the back side of the display panel. A rear case, a light source section arranged between the display panel and the rear case, and a portion sandwiched between the light source section and the rear case, and the location where the light source section is arranged. And a fixing member that is disposed on the surface of the rear housing facing the display panel and that fixes the light source unit to the rear housing.

  For example, in the display device according to the aspect of the present invention, the light source unit may be arranged so as to be in contact with at least the peripheral portion of the opening of the reflection sheet.

  For example, in the display device according to one aspect of the present invention, the light source unit is mounted on the substrate and a substrate disposed between the display panel and the rear housing, and on the rear surface of the display panel. And a light source that emits light toward the reflection sheet, the reflection sheet is superposed on the substrate, and has the opening portion at a portion corresponding to an arrangement position of the substrate, and the fixing member is the substrate. May be fixed to the rear housing.

  Further, a display device according to an aspect of the present invention is a display device for displaying an image, the display panel displaying the image, a rear housing disposed on the back side of the display panel, A substrate disposed between the display panel and the rear housing, a light source mounted on the substrate and emitting light toward the rear surface of the display panel, and between the substrate and the rear housing. A reflection sheet having a portion sandwiched between the substrate and an opening at a portion corresponding to the location of the substrate, and a fixing member for fixing the substrate to the rear case through the opening.

  According to this aspect, the fixing member fixes the substrate to the rear housing through the opening of the reflection sheet. As a result, a part of the reflection sheet is sandwiched between the substrate and the rear case, and the substrate and the reflection sheet are fixed to each other. As a result, since the substrate and the reflection sheet are fixed to each other without using the holder described in the section of the background art, it is possible to prevent light from the light source from being blocked regardless of the arrangement of the light source, The degree of freedom of the optical layout when arranging the light source can be increased. Further, since the holder described in the background art section can be omitted, the manufacturing cost of the display device can be reduced by the amount of the holder.

  For example, in the display device according to one aspect of the present invention, a white resist layer may be formed on the surface of the substrate on which the light source is mounted.

  According to this aspect, since the white resist layer is formed on the surface of the substrate on which the light source is mounted, part of the light from the light source is reflected by the substrate. Thereby, the light from the light source can be efficiently guided to the display panel.

  For example, in the display device according to the aspect of the present invention, the fixing member may be configured by a double-sided adhesive tape.

  According to this aspect, since the fixing member is composed of the double-sided adhesive tape, the double-sided adhesive tape is interposed between the substrate and the rear housing through the opening of the reflection sheet, so that the substrate can be easily mounted on the rear housing. Can be fixed to.

  For example, in the display device according to one aspect of the present invention, the double-sided adhesive tape may be configured to have thermal conductivity.

  According to this aspect, since the double-sided adhesive tape has thermal conductivity, the heat from the light source is transferred to the rear case via the double-sided adhesive tape. Thereby, the heat from the light source can be radiated from the rear case, and the heat radiation effect can be enhanced.

  For example, in the display device according to the aspect of the present invention, the fixing member may be configured by a screw.

  According to this aspect, since the fixing member is composed of the screw, the substrate can be easily fixed to the rear case by screwing the substrate to the rear case.

  For example, in the display device according to one aspect of the present invention, the opening is covered with the substrate, and extends from the main opening, which is a location where the fixing member is disposed, and The tip portion has a slit portion that is exposed without being covered by the substrate, and the substrate is provided with a marking portion that is a mark applied to a portion corresponding to the slit portion. The substrate may be positioned with respect to the reflection sheet when the position of the marking portion and the position of the slit portion match.

  According to this aspect, since the opening has the slit portion and the marking portion is provided on the substrate, the position of the marking portion and the position of the slit portion match when fixing the substrate to the rear case. By doing so, the substrate can be easily positioned with respect to the reflection sheet.

  For example, in the display device according to one aspect of the present invention, the light sources are arranged in a plurality in the longitudinal direction of the substrate at intervals, and the opening is longer than the central portion in the longitudinal direction of the substrate in the longitudinal direction. You may comprise so that it may be arrange|positioned corresponding to the edge part side in.

  According to this aspect, since the opening is arranged so as to correspond to the end side in the longitudinal direction rather than the central portion in the longitudinal direction of the substrate, heat from the central portion in the longitudinal direction of the substrate, which is relatively hot, is generated. Is transmitted to the rear case by a route that bypasses the reflection sheet and the like immediately below it and passes through the opening. As a result, the efficiency of heat transfer from the central portion of the substrate in the longitudinal direction to the rear case is relatively low, and the temperature rise of the rear case can be suppressed.

  For example, in the display device according to one aspect of the present invention, the plurality of light sources are arranged at intervals in the longitudinal direction of the substrate, and the opening is provided in a pair of adjacent light sources of the plurality of light sources. You may comprise so that it may be arrange|positioned correspondingly.

  According to this aspect, since the openings are arranged between the pair of light sources adjacent to each other among the plurality of light sources, the heat from each of the plurality of light sources bypasses the reflection sheet and the like immediately below. Then, it is transmitted to the rear case through the path passing through the opening. As a result, the efficiency of heat transfer from each of the plurality of light sources to the rear case becomes relatively low, so that the temperature rise of the rear case can be suppressed.

  According to the display device of one embodiment of the present invention, the degree of freedom in the optical layout when the light source is arranged can be increased, and the manufacturing cost of the display device can be reduced.

FIG. 3 is a perspective view showing the front side of the display device according to the first embodiment. FIG. 3 is a perspective view showing the back side of the display device according to the first embodiment. FIG. 3 is an exploded perspective view showing a disassembled state of the display device according to the first embodiment. FIG. 3 is a diagram showing an internal structure of the display device according to the first embodiment. FIG. 5 is a cross-sectional view of the display device taken along the line AA in FIG. 4. It is sectional drawing which expands and shows a part of backlight unit of the display apparatus of FIG. It is a disassembled sectional perspective view which shows the state which disassembled a part of backlight unit. FIG. 6 is a diagram showing a part of a backlight unit of the display device according to the second embodiment. It is a figure which shows a part of reflection sheet of FIG. FIG. 9 is a diagram showing an internal structure of a display device according to a third embodiment. It is sectional drawing which shows some backlight units of a display apparatus by the BB line in FIG. FIG. 9 is a cross-sectional view showing a part of a backlight unit of the display device according to the fourth embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that each of the embodiments described below shows a preferred specific example of the present invention. Numerical values, shapes, materials, constituent elements, arrangement positions of constituent elements, connection forms, and the like shown in the following embodiments are examples, and are not intended to limit the present invention. The invention is defined by the claims. Therefore, among the constituent elements in the following embodiments, the constituent elements not described in independent claims are not necessarily required to achieve the object of the present invention, but will be described as constituting a more preferable embodiment. To be done.

(Embodiment 1)
[External structure of display device]
First, the external structure of the display device according to the first embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing the front side of the display device according to the first embodiment. FIG. 2 is a perspective view showing the back side of the display device according to the first embodiment.

  As shown in FIGS. 1 and 2, the display device 2 of the present embodiment is a liquid crystal television receiver. The display device 2 includes a housing 4. The housing 4 is configured by combining a front cabinet 6 and a rear frame 8 (which constitutes a rear housing) with each other.

  The front cabinet 6 is formed in a frame shape and covers an outer peripheral portion of a liquid crystal cell 24 (which constitutes a display panel) described later. The front cabinet 6 is made of resin, for example.

  The rear frame 8 is arranged so as to cover the rear surface side of the liquid crystal cell 24. A flange portion 8a (see FIG. 4, which will be described later) is provided on the outer peripheral portion of the rear frame 8. The rear frame 8 is made of sheet metal such as SECC (Steel Electrically Chromated Coated).

  A rear cover 10 is attached to the outer surface of the rear frame 8. The rear cover 10 is made of resin, for example. Inside the rear cover 10, a power supply board or the like (not shown) for supplying electric power to the liquid crystal cell 24 is housed. A stand 12 for supporting the housing 4 from below is attached to the lower end of the rear cover 10.

[Internal structure of display device]
Next, the internal structure of the display device 2 will be described with reference to FIGS. FIG. 3 is an exploded perspective view showing a disassembled state of the display device according to the first embodiment. FIG. 4 is a diagram showing an internal structure of the display device according to the first embodiment. FIG. 5 is a sectional view of the display device taken along the line AA in FIG.

  As shown in FIG. 3, a backlight unit 14, a diffusion plate 16, a pair of optical sheets 18 and 20, four cell guides 22 a to 22 d, a liquid crystal cell 24, and a liquid crystal cell 24 are provided between the front cabinet 6 and the rear frame 8. Four bezels 26a to 26d are arranged.

  As shown in FIGS. 3 to 5, the backlight unit 14 is a direct-type backlight unit, and is for irradiating light toward the back surface of the liquid crystal cell 24. The backlight unit 14 has a reflection sheet 28 and a plurality of LED bars 30 (each of the plurality of LED bars 30 constitutes a light source section).

  The reflection sheet 28 is arranged so as to cover the inner surface of the rear frame 8. The reflection sheet 28 is for reflecting the light from each of the plurality of LED bars 30 toward the back surface of the liquid crystal cell 24. The reflection sheet 28 is made of, for example, acrylic resin.

  The plurality of LED bars 30 are arranged at intervals and substantially parallel to each other. Each of the plurality of LED bars 30 includes a wiring board 32 (constituting a board) and a plurality of LEDs 34 mounted on the surface of the wiring board 32 (each of the plurality of LEDs 34 forming a light source). There is.

  The wiring board 32 is configured in a long plate shape. The wiring board 32 is formed of a metal having high thermal conductivity, such as aluminum. On the surface of the wiring board 32 (that is, the surface on which the plurality of LEDs 34 are mounted), for example, a white resist layer having a reflectance equal to that of the reflection sheet 28 is formed. The wiring board 32 is arranged on the reflection sheet 28. The wiring board 32 and the reflection sheet 28 are fixed to each other in order to prevent the reflection sheet 28 from bending toward the liquid crystal cell 24. The display device 2 of the present embodiment is characterized by a fixing structure for fixing the wiring board 32 and the reflection sheet 28 to each other. This fixing structure will be described later.

  The plurality of LEDs 34 are arranged in a line along the longitudinal direction of the wiring board 32 and at intervals. Each of the plurality of LEDs 34 is, for example, a power LED.

  As shown in FIGS. 3 and 5, the diffuser plate 16 is formed in a rectangular thin plate shape, and is arranged between the backlight unit 14 and the liquid crystal cell 24. The diffusion plate 16 is for diffusing the light from the backlight unit 14 toward the back surface of the liquid crystal cell 24. A plurality of support members 36 are arranged on the reflection sheet 28. Each of the plurality of support members 36 is for suppressing the diffusion plate 16 from bending toward the backlight unit 14, and supports the back surface of the diffusion plate 16. Each of the plurality of support members 36 also has a function of fixing the reflection sheet 28 and the rear frame 8 to each other.

  The pair of optical sheets 18 and 20 are arranged so as to cover the surface of the diffusion plate 16 in a state where they are overlapped with each other. Each of the pair of optical sheets 18 and 20 is for guiding the light diffused by the diffusion plate 16 to the back surface of the liquid crystal cell 24, for example.

  As shown in FIG. 5, the outer peripheral portion of each of the reflection sheet 28, the diffusion plate 16 and the pair of optical sheets 18 and 20 described above is supported by the flange portion 8 a of the rear frame 8.

  Each of the four cell guides 22a to 22d has a long shape. The four cell guides 22a to 22d are combined with each other to form a rectangular frame shape as a whole. The four cell guides 22 a to 22 d combined in a frame shape are attached to the flange portion 8 a of the rear frame 8.

  The liquid crystal cell 24 has a rectangular panel shape. The outer peripheral portion of the liquid crystal cell 24 on the back side is supported by four cell guides 22a to 22d combined in a frame shape. An image is displayed on the liquid crystal cell 24 by irradiating the back surface of the liquid crystal cell 24 with the light from the backlight unit 14.

  Each of the four bezels 26a to 26d has a long shape. The four bezels 26a to 26d are combined with each other to form a rectangular frame shape as a whole. The four bezels 26 a to 26 d combined in a frame shape cover the outer peripheral portion on the front surface side of the liquid crystal cell 24.

  The front cabinet 6 is attached to the rear frame 8 so as to cover the four bezels 26a to 26d combined in a frame shape.

[Fixed structure]
Next, a fixing structure for fixing the wiring board 32 and the reflection sheet 28 to each other will be described with reference to FIGS. 4, 6 and 7. FIG. 6 is an enlarged cross-sectional view showing a part of the backlight of the display device of FIG. FIG. 7 is an exploded cross-sectional perspective view showing a state in which a part of the backlight unit is disassembled.

  As shown in FIGS. 4, 6 and 7, a pair of openings 38 is provided in the portion of the reflection sheet 28 corresponding to the location of the wiring board 32 (that is, the portion covered by the wiring board 32). Has been. Each of the pair of openings 38 is formed in a horizontally long rectangular shape extending in the longitudinal direction of the wiring board 32, and is arranged at intervals in the longitudinal direction of the wiring board 32. That is, the pair of openings 38 are arranged so as to correspond to the ends 32b and 32c in the longitudinal direction of the wiring board 32 with respect to the central portion 32a in the longitudinal direction.

  A double-sided adhesive tape 40 having thermal conductivity (constituting a fixing member) is arranged in each of the pair of openings 38 described above. The double-sided adhesive tape 40 has a shape corresponding to the shape of the opening 38, and is made of, for example, an acrylic material. The first adhesive surface 40 a of the double-sided adhesive tape 40 is attached to the inner surface of the rear frame 8 exposed through the opening 38. The second adhesive surface 40b opposite to the first adhesive surface 40a of the double-sided adhesive tape 40 is attached to the back surface of the wiring board 32 (that is, the surface opposite to the surface on which the plurality of LEDs 34 are mounted). Has been.

  As a result, each of the pair of double-sided adhesive tapes 40 fixes the wiring board 32 to the rear frame 8 through the corresponding openings 38. By fixing the wiring board 32 to the rear frame 8 in this manner, a part of the reflection sheet 28 (that is, a portion which is covered by the wiring board 32 and in which the opening 38 is not provided) is formed. It is sandwiched between the wiring board 32 and the rear frame 8. As a result, the wiring board 32 and the reflection sheet 28 are fixed to each other, and the reflection sheet 28 is prevented from bending toward the liquid crystal cell 24.

  Here, a procedure for fixing the wiring board 32 to the rear frame 8 will be briefly described. First, the reflection sheet 28 is attached to the inner surface of the rear frame 8. Next, the first adhesive surface 40a of the double-sided adhesive tape 40 is attached to the inner surface of the rear frame 8 exposed through the opening 38. Then, the second adhesive surface 40b of the double-sided adhesive tape 40 is attached to the back surface of the wiring board 32 by placing the wiring board 32 on the reflection sheet 28. As a result, the wiring board 32 is fixed to the rear frame 8 by the pair of double-sided adhesive tapes 40.

  Instead of the procedure described above, the wiring board 32 may be fixed to the rear frame 8 by the following procedure, for example. First, the reflection sheet 28 is attached to the inner surface of the rear frame 8. Next, the second adhesive surface 40b of the double-sided adhesive tape 40 is attached to the back surface of the wiring board 32 in advance. After that, the wiring board 32 to which the double-sided adhesive tape 40 is attached is placed on the reflection sheet 28 so that the first adhesive surface 40a of the double-sided adhesive tape 40 is exposed to the inner surface of the rear frame 8 through the opening 38. Paste it on.

[effect]
Next, the effects obtained by the display device 2 of the present embodiment will be described. As described above, each of the pair of double-sided adhesive tapes 40 fixes the wiring board 32 to the rear frame 8 through the corresponding opening 38. As a result, a part of the reflection sheet 28 is sandwiched between the wiring board 32 and the rear frame 8, and the wiring board 32 and the reflection sheet 28 are fixed to each other. As a result, since the wiring board 32 and the reflection sheet 28 are fixed to each other without using the holder described in the background art section, the light from each of the plurality of LEDs 34 is shielded regardless of the arrangement of the plurality of LEDs 34. This can be suppressed, and the degree of freedom in the optical layout when arranging the plurality of LEDs 34 can be increased. Furthermore, since the holder described in the background art section can be omitted, the manufacturing cost of the display device 2 can be reduced.

  Although a part of the reflection sheet 28 is covered by the wiring board 32, as described above, since the white resist film is formed on the surface of the wiring board 32, one of the light from each of the plurality of LEDs 34 is not formed. The parts are reflected on the surface of the wiring board 32. Thereby, the light from each of the plurality of LEDs 34 can be efficiently guided to the back surface of the liquid crystal cell 24.

  Furthermore, the display device 2 of the present embodiment can also obtain the following effects. As each of the plurality of LEDs 34 lights up, heat from each of the plurality of LEDs 34 is transferred to the rear frame 8 via the wiring board 32 and the pair of double-sided adhesive tapes 40, and is radiated from the rear frame 8. Generally, in the LED bar 30 in which the plurality of LEDs 34 are arranged side by side in the longitudinal direction of the wiring board 32, heat from each of the plurality of LEDs 34 tends to concentrate on the central portion 32 a of the wiring board 32. In the display device 2 of the present embodiment, since the pair of double-sided adhesive tapes 40 are arranged corresponding to the end portions 32b, 32c side in the longitudinal direction of the wiring substrate 32, the central portion 32a in the longitudinal direction thereof is arranged. The heat from the central portion 32a of the wiring board 32 is transferred to the rear frame 8 by a route that bypasses the reflection sheet 28 immediately thereunder and passes through the double-sided adhesive tape 40. As a result, the efficiency of heat transfer from the central portion 32a of the wiring board 32 to the rear frame 8 becomes relatively low, so that the temperature rise of the rear frame 8 can be suppressed. As a result, the temperature of the rear frame 8 exposed to the outside of the display device 2 can be maintained below a reference temperature (for example, 30° C.) defined by the UL (Underwriters Laboratories Inc) standard.

  In order to transfer the heat from the central portion 32a of the wiring board 32 to the rear frame 8 by bypassing the reflection sheet 28 immediately thereunder, the air may be provided directly below the central portion 32a of the wiring board 32 instead of the reflection sheet 28. You may form a layer.

(Embodiment 2)
Next, the configuration of the display device according to the second embodiment will be described with reference to FIGS. 8 and 9. FIG. 8 is a diagram showing a part of the backlight unit of the display device according to the second embodiment. FIG. 9 is a diagram showing a part of the reflection sheet of FIG. In addition, in each of the following embodiments, the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

  As shown in FIGS. 8 and 9, in the backlight unit 14A of the display device 2A of the present embodiment, the opening 38A of the reflection sheet 28A has a main opening 42a and a slit 42b. The main opening 42a is a portion covered by the wiring board 32A, and is configured in a horizontally long rectangular shape extending in the longitudinal direction of the wiring board 32A. The double-sided adhesive tape 40 is arranged in the main opening 42a. The slit portions 42b are portions extending from the both ends in the longitudinal direction of the main opening 42a substantially perpendicular to the longitudinal direction of the wiring board 32A. As shown in FIG. 8, when the wiring board 32A is placed on the reflection sheet 28A, the leading end of the slit portion 42b is exposed without being covered by the wiring board 32A.

  Furthermore, in the backlight unit 14A of the display device 2A of the present embodiment, the marking portion 44 formed by, for example, silk printing is provided on the surface of the wiring board 32A of the LED bar 30A. The marking portion 44 is, for example, a linear mark extending substantially perpendicular to the longitudinal direction of the wiring board 32A. The marking portion 44 is provided at a location corresponding to the slit portion 42b.

  The display device 2A according to the present embodiment can obtain the following effects in addition to the effects described in the first embodiment. When the wiring board 32A is fixed to the rear frame 8, the wiring board 32A can be easily positioned with respect to the reflection sheet 28A by matching the position of the marking portion 44 with the position of the slit portion 42b.

(Embodiment 3)
Next, the configuration of the display device according to the third embodiment will be described with reference to FIGS. 10 and 11. FIG. 10 is a diagram showing the internal structure of the display device according to the third embodiment. 11 is a cross-sectional view showing a part of the backlight of the display device, taken along the line BB in FIG.

  As shown in FIGS. 10 and 11, in the backlight unit 14B of the display device 2B of the present embodiment, the reflective sheet 28B is provided with a plurality of openings 38B. Each of the plurality of openings 38B is arranged corresponding to a pair of adjacent LEDs 34 among the plurality of LEDs 34. A double-sided adhesive sheet 40B is arranged in each of the plurality of openings 38B. As a result, each of the plurality of double-sided adhesive sheets 40B is arranged correspondingly between the pair of adjacent LEDs 34 among the plurality of LEDs 34.

  With the display device 2B of the present embodiment, the following effects can be obtained. The heat from each of the plurality of LEDs 34 is transferred to the rear frame 8 by a route that bypasses the reflection sheet 28B immediately thereunder and passes through the double-sided adhesive sheet 40B. As a result, the efficiency of heat transfer from each of the plurality of LEDs 34 to the rear frame 8 becomes relatively low, so that the temperature rise of the rear frame 8 can be suppressed. As a result, the temperature of the rear frame 8 exposed to the outside of the display device 2B can be maintained below the reference temperature (for example, 30° C.) defined by the UL standard.

  In order to transfer the heat from each of the plurality of LEDs 34 to the rear frame 8 by bypassing the reflection sheet 28B immediately thereunder, an air layer is formed directly below each of the plurality of LEDs 34 instead of the reflection sheet 28B. May be.

(Embodiment 4)
Next, the configuration of the display device according to the fourth embodiment will be described with reference to FIG. FIG. 12 is a cross-sectional view showing a part of the backlight unit of the display device according to the fourth embodiment.

  As shown in FIG. 12, in the backlight unit 14C of the display device 2C according to the present embodiment, the screws 46 (constituting a fixing member) are used in place of the double-sided adhesive tapes 40 and 40B described above, so that the wiring board 32C can be obtained. Is fixed to the rear frame 8C.

  The wiring board 32C of the LED bar 30C is provided with a pair of through holes 48 into which the screws 46 are inserted. The reflective sheet 28C is provided with a pair of openings 38C corresponding to the pair of through holes 48. Each of the pair of openings 38C is formed, for example, in a circular shape, and its diameter is slightly larger (for example, about several mm) than the diameter of the screw 46. Further, the rear frame 8C is provided with a pair of screw holes 50 corresponding to the pair of through holes 48 for screwing the screws 46.

  The wiring board 32C is fixed to the rear frame 8C by screwing the screw 46 into the screw hole 50 through the through hole 48 and the opening 38C. Even with such a configuration, the same effect as that of the first embodiment can be obtained. By matching the through hole 48 and the opening 38C, the wiring board 32C can be easily positioned with respect to the reflection sheet 28C.

  The display devices according to the first to fourth embodiments of the present invention have been described above, but the present invention is not limited to these embodiments. For example, the above embodiments may be combined.

  In each of the above embodiments, the case where the display device is a liquid crystal television receiver has been described, but the present invention is not limited to this. The display device may be, for example, a liquid crystal monitor for a personal computer.

  In each of the above embodiments, the wiring board is made of aluminum, but the wiring board is not limited to this and may be made of glass epoxy resin or the like.

  Although the double-sided adhesive tape having heat conductivity is used as the fixing member in the first to third embodiments, the invention is not limited to this, and a double-sided adhesive tape having no heat conductivity may be used as the fixing member.

  The display device of the present invention can be applied, for example, as a liquid crystal television receiver.

2, 2A, 2B, 2C display device 4 housing 6 front cabinet 8, 8C rear frame 8a flange portion 10 rear cover 12 stand 14, 14A, 14B, 14C backlight unit 16 diffuser plate 18, 20 optical sheet 22a, 22b, 22c , 22d Cell guide 24 Liquid crystal cell 26a, 26b, 26c, 26d Bezel 28, 28A, 28B, 28C Reflective sheet 30, 30A, 30C LED bar 32, 32A, 32C Wiring board 32a Central part 32b, 32c End part 34 LED
36 Supporting members 38, 38A, 38B, 38C Openings 40, 40B Double-sided adhesive tape 40a First adhesive surface 40b Second adhesive surface 42a Main opening 42b Slit portion 44 Marking portion 46 Screw 48 Through hole 50 Screw hole

Claims (6)

A display device for displaying an image,
A display panel for displaying the image,
A rear housing arranged on the rear side of the display panel,
A light source unit disposed between the display panel and the rear housing,
A reflection sheet, a part of which is sandwiched between the light source section and the rear housing, and which has a plurality of openings in a portion corresponding to the location of the light source section,
A fixing member arranged on the surface of the rear housing on the display panel side, for fixing the light source unit to the rear housing,
The light source unit,
A substrate disposed between the display panel and the rear housing,
A plurality of light sources that are mounted at intervals in the longitudinal direction of the substrate and that emit light toward the back surface of the display panel;
The reflection sheets are superposed so as to contact the substrate, and are arranged at intervals in the longitudinal direction of the substrate at portions corresponding to the arrangement positions of the substrate , each of which is adjacent to the plurality of light sources. Having a plurality of openings arranged correspondingly between a pair of light sources ,
A display device in which the fixing member fixes the substrate to the rear housing. The display device according to claim 1, wherein the light source unit is disposed so as to contact at least a peripheral portion of the opening of the reflection sheet. The display device according to claim 1, wherein a white resist layer is formed on a surface of the substrate on which the plurality of light sources are mounted. The display device according to claim 1, wherein the fixing member is made of a double-sided adhesive tape. The display device according to claim 1, wherein the fixing member includes a screw. The opening is
A main opening that is a portion covered with the substrate and in which the fixing member is arranged;
A slit portion that extends from the main opening and is a portion where the tip portion is exposed without being covered by the substrate,
The substrate is provided with a marking portion, which is a mark provided at a location corresponding to the slit portion,
The substrate, by the position of the marking portion and the position of the slit portion are matched, the display device according to any one of claims 1 to 5, which is positioned relative to the reflecting sheet.

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