JP2014066924A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device that can realize weight saving and manufacturing cost reduction as well as both improvement of an ability to hold a display panel and improvement of a degree of freedom upon designing.SOLUTION: Since a chassis body 31 of a backlight chassis 3 has an opening 310 and notch-shape parts 311 to 316 provided, the chassis body is lightweight and material costs are reduced. A display panel 21 is held between a front cabinet on a front face side and the chassis body 31 on a rear face side. The chassis body 31 presses a part of a peripheral edge of the display panel 21 and a part of a central part in a face direction onto a front cabinet side. Thereby, the ability to hold the display panel 21 is improved. Further, since the chassis body 31 has many available portions on which circuit substrates 11 to 13 can be mounted, the degree of freedom upon designing as to the mounting of the circuit substrates 11 to 13 is improved.

Description

  The present invention relates to a display device configured to hold a display panel between a front cabinet and a holding body.

The liquid crystal display device includes a liquid crystal display panel, a backlight, a backlight chassis, and a circuit board. The backlight illuminates the liquid crystal display panel from the back side of the liquid crystal display panel.
The edge-light type backlight has a light guide plate disposed on the back side of the liquid crystal display panel via an optical sheet group, a reflective sheet is disposed on the back side of the light guide plate, and faces the lower end surface of the light guide plate. The LED mounted on one surface of the LED substrate is arranged.
Light emitted from the LED is guided to the back side of the liquid crystal display panel by the light guide plate and the reflection sheet, and enters the liquid crystal display panel through diffusion and condensing by the optical sheet group. As a result, the display surface of the liquid crystal display panel becomes uniformly bright.

The circuit board is a control board and a power supply board for displaying an image on the liquid crystal display panel.
The liquid crystal display panel, the backlight, the backlight chassis, and the circuit board are accommodated in a housing that uses a front cabinet and a rear cabinet. At this time, the liquid crystal display panel, the optical sheet group, the light guide plate, and the reflection sheet are held between the front cabinet and the backlight chassis. The circuit board is attached to the back surface of the backlight chassis.

For this purpose, the backlight chassis integrally includes a flat plate-like portion and a diaphragm-shaped portion that protrudes toward the back side. Then, the reflection sheet, the light guide plate, the optical sheet group, and the liquid crystal display panel are pressed toward the front cabinet at the flat portion, and the circuit board is attached to the aperture-shaped portion.
Conventionally, a liquid crystal display device having a frame surrounding at least a part of a light guide plate instead of a backlight chassis has been proposed (see Patent Document 1). In the case of the liquid crystal display device described in Patent Document 1, the liquid crystal display panel, the optical sheet group, the light guide plate, and the reflection sheet are held between the front cabinet and the frame.

  The frame has a loop shape surrounding the entire circumference of the light guide plate, a C shape, or the like. For this reason, the frame is lighter than the backlight chassis. Moreover, since the material for forming the frame is small compared with the backlight chassis, the material cost is reduced. As a result, the weight of the display device can be reduced and the manufacturing cost can be reduced.

JP 11-337937 A

However, the frame included in the liquid crystal display device described in Patent Document 1 presses the peripheral edge of the display panel toward the front cabinet, and does not include a portion pressing the center in the surface direction of the display panel toward the front cabinet. Therefore, the frame included in the liquid crystal display device described in Patent Document 1 is inferior in ability to hold the display panel than the conventional backlight chassis.
Further, the frame included in the liquid crystal display device described in Patent Document 1 does not include a portion that presses the center in the surface direction of the display panel to the front cabinet side. It will be limited. In other words, the degree of design freedom is impaired.

  The present invention has been made in view of such circumstances, and its main purpose is to achieve both weight reduction and reduction in manufacturing cost, improvement in ability to hold a display panel, and improvement in design freedom. It is to provide a display device.

  The display device according to the present invention includes a display panel having a display surface on the front side, a front cabinet that surrounds a peripheral portion of the display surface, and a holder that holds the display panel between the front cabinet. In the display device, the holding body has a plate shape in which a plurality of openings and / or cutout portions are provided, and a part of the front surface of the holding body is a back surface of at least a part of the peripheral edge of the display panel. The other part of the front surface of the holding body is located on the back side of at least a part of the center portion in the surface direction of the display panel.

  In the display device according to the present invention, the holding body has a shape in which a plurality of X-shaped plates are integrally juxtaposed in the surface direction of the display panel.

  The display device according to the present invention includes a light source, a reflective sheet that is disposed on the back side of the display panel and on the front side of the holding body, and reflects light emitted from the light source toward the display panel. A rear cabinet covering the back side of the holding body, and the rear cabinet is provided with a holding protrusion for holding the reflective sheet protruding from the display panel through the opening or the cutout portion. It is characterized by being.

  The display device according to the present invention is provided integrally with a circuit board for displaying an image on the display panel and the holding body so as to protrude from the holding body to the back side, and the circuit board is attached to the display board. And a plate-like mounting protrusion.

  In the display device according to the present invention, a hooking portion is provided on one side of the holding body, and a hooking portion on which the hooking portion is hooked is provided on one side of the front cabinet. Features.

  A television receiver according to the present invention includes the display device according to the present invention and a receiving unit that receives a television broadcast, and an image is displayed on the display device based on the television broadcast received by the receiving unit. It is characterized by being displayed.

In the present invention, the display device includes a display panel, a front cabinet, and a holding body.
The holding body has a plate shape. The plate-like holding body is provided with a plurality of openings, a plurality of cutout portions, or one or a plurality of openings and one or a plurality of cutout portions. It has been. The holding body provided with a plurality of openings and / or cut-out portions is lighter than a holding body provided with neither openings nor cut-out portions. In addition, since the amount of material for forming the holding body is small, the material cost is reduced.

The front cabinet surrounds the periphery of the display surface of the display panel.
The display panel is held between the front cabinet on the front side and the holding body on the back side. At this time, the holding body presses at least a part of the peripheral part of the display panel and at least a part of the center part in the surface direction of the display panel to the front cabinet side. For this reason, compared with the frame provided in the liquid crystal display device described in Patent Document 1, the ability to hold the display panel is improved. Furthermore, compared to the frame included in the liquid crystal display device described in Patent Document 1, for example, the degree of freedom in design regarding the mounting position of the circuit board is improved.

In the present invention, the holding body has, for example, an XX plate shape. Here, the XX-shaped plate shape is a shape in which two X-shaped plates are integrally juxtaposed in the surface direction of the display panel.
It has been empirically known that both the X-shaped plate-shaped holding body and the XX-shaped plate-shaped holding body have high strength against bending of the display panel or torsion applied to the display device. However, it is difficult for the X-shaped plate-shaped holding body to stably arrange each circuit board, particularly when there are a plurality of circuit boards.

  The XX-shaped plate-shaped holding body can achieve both stable arrangement and strength of a plurality of circuit boards. The same applies to a holder having a shape in which three or more X-shaped plates are integrally juxtaposed in the surface direction of the display panel.

In the present invention, the display device further includes a light source, a reflective sheet, and a rear cabinet.
The display panel and the reflection sheet are held between the front cabinet on the front side and the holding body on the back side. Further, the reflection sheet is held between the display panel and a holding projection protruding from the rear cabinet. For this purpose, the holding projection is inserted into the opening or the notch-like portion of the holding body.

Due to the presence of the holding projections, it is possible to stably hold the portion of the reflective sheet that is located on the front side of the opening or the notch-like portion of the holding body. That is, it is possible to suppress inconvenience that the reflecting sheet is bent or displaced due to the opening and / or the notch-like portion provided in the holding body.
The light emitted from the light source is incident on the inside of the display panel from the back side of the display panel by being reflected by the reflection sheet.

In the present invention, the display device further includes a circuit board and a mounting protrusion.
The attachment protrusion is integrally provided on the holding body.
The circuit board is attached to the attachment protrusion. The attachment protrusion protrudes from the holding body to the back side. Therefore, a circuit board can be separated from the member which exists in a front side rather than a holding body and a holding body.

  In this invention, the latching | locking part provided in the one side of the holding body is latched by the latched part provided in the one side of the front cabinet. In this case, since the holding body can be hooked to the front cabinet, the holding body can be easily assembled to the front cabinet.

In the present invention, the television receiver includes the display device and the receiving unit according to the present invention.
In the display device according to the present invention, the display panel can be securely held by a lightweight and inexpensive holder. For this reason, generation | occurrence | production of the distortion of a display panel, position shift, or a failure | damage etc. can be suppressed. Therefore, the video based on the television broadcast received by the receiving unit can be stably displayed.

  According to the display device of the present invention, the holding body provided in the display device is lightweight, and the material cost for forming the holding body is reduced. For this reason, weight reduction of a display apparatus and reduction of manufacturing cost can be aimed at.

It is a perspective view which shows the external appearance of a television receiver provided with the display apparatus which concerns on embodiment of this invention. It is a longitudinal cross-sectional view which shows the structure of a display apparatus typically. It is a perspective view which shows the structure of the backlight chassis with which a display apparatus is provided. It is a front view which shows the structure of a backlight chassis. It is a rear view which shows the structure of a backlight chassis. It is a longitudinal cross-sectional view explaining the attachment with respect to the front cabinet of a backlight chassis. It is a longitudinal cross-sectional view explaining the attachment with respect to the backlight chassis of a circuit board.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. In the following description, up and down, front and rear, and left and right indicated by arrows in the figure are used.

FIG. 1 is a perspective view showing an appearance of a television receiver 1 including a display device 10 according to an embodiment of the present invention.
The television receiver 1 includes a display device 10, a reception board (reception unit) 11, a signal processing board 12, a power supply board 13, and a stand 14.
The display device 10 includes a rectangular display panel 21 and a housing 100. The front part of the housing 100 is formed by using a rectangular frame-shaped front cabinet 15. The rear part of the housing 100 is formed by using a rear cabinet 16 having a rectangular tray shape.

The receiving board 11, the signal processing board 12, and the power supply board 13 (hereinafter collectively referred to as circuit boards 11 to 13) are all built in the housing 100. The receiving board 11 is a circuit board on which a receiving circuit that receives a television broadcast from the outside via an antenna (not shown) is mounted. The signal processing board 12 is a circuit board on which a signal processing circuit that outputs video data by performing predetermined signal processing on the television signal received by the receiving board 11 is mounted. The power supply board 13 is a circuit board on which a power supply circuit that distributes power from a commercial power supply to each part of the apparatus is mounted.
In the four corners of each of the circuit boards 11 to 13, insertion holes 1a, 1a,... (Only one is shown in FIG. 7) through which bolts are inserted are formed.

The display panel 21 has a display surface 21a on the front side. The display panel 21 displays an image based on the image data output from the signal processing circuit of the signal processing board 12 on the display surface 21a.
The stand 14 is provided in the lower part of the display device 10 and supports the display device 10 in a vertical posture.
The front cabinet 15 is formed by extrusion using, for example, aluminum, and has a rectangular opening 151 at the center thereof.
The rear cabinet 16 is made of, for example, an electrogalvanized steel sheet.

The front cabinet 15 and the rear cabinet 16 have substantially the same vertical and horizontal dimensions, and their peripheral portions face each other.
The display panel 21 is accommodated in the casing 100 in a vertical posture so that an effective display area located at the center of the display surface 21 a is exposed from the opening 151. The vertical and horizontal dimensions (that is, the vertical and horizontal directions) of the display panel 21 are slightly larger than the vertical and horizontal dimensions of the opening 151. Therefore, the front cabinet 15 surrounds the periphery of the display surface 21 a of the display panel 21.

Next, the configuration of the display device 10 will be described in detail.
FIG. 2 is a longitudinal sectional view schematically showing the configuration of the display device 10. FIG. 2 shows the configuration in the vicinity of the lower side of the peripheral edge of the front cabinet 15. In FIG. 2, the circuit boards 11 to 13 are not shown.
FIG. 3 is a perspective view illustrating a configuration of the backlight chassis 3 included in the display device 10.

4 and 5 are a front view and a rear view showing the configuration of the backlight chassis 3. FIG. 4 shows the backlight chassis 3, the circuit boards 11 to 13, and the rear cabinet 16. FIG. 5 shows the backlight chassis 3 and a reflection sheet 24 described later.
FIG. 6 is a longitudinal sectional view for explaining the attachment of the backlight chassis 3 to the front cabinet 15. FIG. 6 shows a configuration near the upper side of the front cabinet 15.

FIG. 7 is a longitudinal sectional view for explaining the attachment of the circuit boards 11 to 13 to the backlight chassis 3. FIG. 7 illustrates the case of the reception board 11, but the same applies to the case of the signal processing board 12 or the power supply board 13.
First, the front cabinet 15 will be described.
The front cabinet 15 has a rectangular plate shape with an opening 151 formed in the center, and the front surface of the front cabinet 15 is exposed to the outside.

  An elastic member 153 for suppressing damage to the display panel 21 is continuously provided along the peripheral direction of the front cabinet 15 at the opening edge of the opening 151 on the rear surface of the front cabinet 15 (that is, the inner edge portion of the front cabinet 15). Or it arranges intermittently.

On the upper side of the rear surface of the front cabinet 15 (that is, the top side of the front cabinet 15), a plurality of quadrangular prism-shaped hooking portions 17 arranged in a lateral posture are respectively projected rearward (one piece). Only shown). The hooked portions 17, 17,... Are juxtaposed in the left-right direction. A screw hole 171 is provided in the rear end surface of each hooked portion 17.
A plurality of square pillar-shaped screw receivers 154 arranged in a horizontal posture are provided on the lower side of the rear surface of the front cabinet 15 so as to protrude rearward (only one is shown). The screw receivers 154, 154,... Are juxtaposed in the left-right direction. Screw holes 155 are juxtaposed in the left-right direction on the rear end face of each screw receiver 154.

Next, the display panel 21 will be described.
The display panel 21 is a liquid crystal display panel. The display panel 21 is illuminated from the back surface 21b side of the display panel 21 by an edge light type backlight described later. The display panel 21 has a glass plate on the display surface 21a side and a glass plate on the back surface 21b side. Liquid crystal is disposed between the two glass plates, and the transmittance of the display panel 21 changes according to the voltage applied to the liquid crystal. Therefore, the light from the backlight is transmitted through the display panel 21 or blocked from passing through the display panel 21. As a result, an image is displayed on the display surface 21a.

The backlight is configured by using an optical sheet group 22, a light guide plate 23, a reflection sheet 24, LEDs (light sources) 25, 25,. The optical sheet group 22 will be described next, and the others will be described later.
The optical sheet group 22 is formed by laminating a plurality of optical sheets such as an optical sheet having a light diffusion function and an optical sheet having a light collecting function. The optical sheet group 22 is disposed in close contact with the back surface 21 b of the display panel 21.
The display panel 21 in which the optical sheet group 22 is disposed in close contact with the back surface 21b is attached to the front cabinet 15 from the rear so that the peripheral edge of the display surface 21a is in contact with the elastic member 153.

Next, the configuration of the LED unit will be described. Here, a group of the LEDs 25, 25,..., The LED substrate 26, and the heat sink 27 is referred to as an LED unit.
The LED board 26 is in the shape of a horizontally long rectangular plate arranged in a horizontal posture. A plurality of LEDs 25, 25,... Juxtaposed in the longitudinal direction of the LED substrate 26 are mounted on the upper surface of the LED substrate 26.

The heat sink 27 has a horizontally long bar shape and an inverted L-shaped vertical cross-sectional shape. The heat sink 27 is a rectangular plate-shaped substrate mounting portion 271 arranged on one side in a horizontal posture, and a rectangular plate-shaped housing mounting portion 272 arranged on the other side in a vertical posture. The LED substrate 26 is attached to the upper surface of the substrate attachment portion 271. At this time, the longitudinal directions of the board mounting portion 271 and the LED board 26 are aligned with each other.
The LED unit is attached to the front cabinet 15 from the rear with the front end portion of the board attachment portion 271 facing the front side and the base end portion facing the rear side.

At this time, the heat sink 27 is screwed to the front cabinet 15 as will be described later. For this purpose, the housing mounting portion 272 is formed with a fool hole corresponding to the screw holes 155, 155,... Of the front cabinet 15.
At this time, the LEDs 25, 25,... Are opposed to the lower end surface of the light guide plate 23.

Next, the configuration of the backlight will be described.
The light guide plate 23 has a rectangular plate shape. The light guide plate 23 is disposed in close contact with the back surface of the optical sheet group 22.
The reflection sheet 24 is disposed in close contact with the back surface of the light guide plate 23.

  The light emitted from the LEDs 25, 25,... Enters the light guide plate 23 from the lower end surface of the light guide plate 23. The light incident on the inside of the light guide plate 23 is emitted from the front surface or the back surface of the light guide plate 23 (that is, the light guide plate 23 emits surface light). The light emitted from the back surface of the light guide plate 23 is reflected by the reflection sheet 24 and enters the light guide plate 23 again. The light emitted from the front surface of the light guide plate 23 enters the display panel 21 from the back surface 21 b of the display panel 21 after being diffused and condensed by the optical sheet group 22. As a result, the display surface 21a of the display panel 21 is uniformly brightened.

  The backlight chassis 3 holds the display panel 21, the optical sheet group 22, the light guide plate 23, and the reflection sheet 24 with the front cabinet 15. The backlight chassis 3 supports the circuit boards 11 to 13. For this purpose, the backlight chassis 3 has a metal plate shape. In addition, the backlight chassis 3 integrally includes a chassis main body (holding body) 31, a plurality of mounting protrusions 32, 32,..., And latching portions 33, 33,.

  The backlight chassis 3 is generally made of iron. However, as long as the backlight chassis 3 has sufficient strength, there is no particular problem even if it is lighter than that made of iron, for example, aluminum.

The chassis main body 31 has a shape in which an opening 310 and cutout portions 311 to 316 are formed on a rectangular plate.
The opening 310 has a rhombus shape and is provided at the center of the chassis main body 31 in the vertical and horizontal directions.
Each of the cutout portions 311 and 314 has an inverted isosceles triangle shape. The cutout portions 311 and 314 are arranged in parallel in the left-right direction at the upper side portion of the chassis main body 31.

The notch-shaped portion 312 has an isosceles triangle shape that has fallen to the right. The notch-shaped portion 312 is provided at the center in the vertical direction of the left side portion of the chassis main body 31.
Each of the cutout portions 313 and 316 has an isosceles triangle shape. The notch portions 313 and 316 are arranged in the left-right direction at the lower side portion of the chassis main body 31.
The notch-shaped portion 315 has an isosceles triangle shape that has fallen to the left. The cutout portion 315 is provided at the center in the vertical direction of the right side portion of the chassis main body 31.

  More specifically, the chassis main body 31 has a shape in which two X-shaped plates are integrally arranged side by side in the plane direction in the left-right direction. Accordingly, the chassis main body 31 is radially arranged on the left side portion of the chassis main body 31 in a radial manner on the first to fourth plate portions 31 a to 31 d and on the right side portion of the chassis main body 31. It has 5th-8th board part 31e-31h integrally.

The first plate portion 31a (and the second plate portion 31b) is the upper left portion (and the upper right portion) of the left X-shaped plate, and the third plate portion 31c (and the fourth plate portion 31d) is The lower left part (and the lower right part) of the left X-shaped plate.
Similarly, the fifth plate portion 31e (and the sixth plate portion 31f) is the upper left portion (and the upper right portion) of the right X-shaped plate, and the seventh plate portion 31g (and the eighth plate portion). 31h) is a lower left portion (and a lower right portion) of the right X-shaped plate.

Between the first plate portion 31a and the second plate portion 31b, between the first plate portion 31a and the third plate portion 31c, and between the third plate portion 31c and the fourth plate portion 31d. Between these are the notch-shaped portions 311, 312, and 313 of the chassis main body 31.
Similarly, between the fifth plate portion 31e and the sixth plate portion 31f, between the sixth plate portion 31f and the eighth plate portion 31h, and between the seventh plate portion 31g and the eighth plate portion. The space between 31h is the notched portions 314, 315 and 316 of the chassis main body 31.

  The tip of the second plate 31b and the tip of the fifth plate 31e are connected, and the tip of the fourth plate 31d and the tip of the seventh plate 31g are connected. Yes. A portion surrounded by the second plate portion 31b, the fourth plate portion 31d, the seventh plate portion 31g, and the eighth plate portion 31h is the opening 310 of the chassis main body 31.

The screw holes 171, 171 of the hooked portions 17, 17,... Are provided at the distal ends of the first plate portion 31a, the second plate portion 31b, the fifth plate portion 31e, and the sixth plate portion 31f. ,... (See FIG. 6) are formed.
Further, the first plate portion 31a, the second plate portion 31b, the fifth plate portion 31e, and the sixth plate portion 31f are laterally directed forward from the front end portions (that is, the top side of the chassis main body 31). Plate-shaped latching portions 33, 33,.
The tip of each of the third plate portion 31c, the fourth plate portion 31d, the seventh plate portion 31g, and the eighth plate portion 31h has a fool corresponding to the screw holes 155, 155,. Holes 318, 318,... (See FIG. 2) are formed.

  Each mounting protrusion 32 forms an L-shaped angle projecting from the chassis main body 31 to the back side. One side of the L-shaped angle of each mounting projection 32 has a flat plate shape that is perpendicular to the display panel 21 (that is, a vertical posture along the vertical and front-rear directions), and is raised rearward from an appropriate location on the chassis body 31. It has been. The other side of the L-shaped angle of each mounting projection 32 has a flat plate shape parallel to the display panel 21 (that is, a vertical posture along the vertical and horizontal directions), and an insertion hole 32a through which a bolt is inserted (see FIG. 7). ) Is formed.

  When attaching the backlight chassis 3 as described above, first, the latching portions 33, 33,... Of the backlight chassis 3 are latched on the upper surfaces of the latched portions 17, 17,. At this time, the front surface of the chassis main body 31 is disposed in close contact with the back surface of the reflection sheet 24.

  Next, the chassis body 31 is screwed into the screw holes 171, 171,... Of the hooked parts 17, 317,. Further, the chassis body 31 and the heat sink 27 are screwed into the screw holes 155, 155,... Of the front cabinet 15 through the hole holes 318, 318,. Is done.

  At this time, each of the first to eighth plate portions 31a to 31h of the chassis main body 31 extending from the radial center portion to the tip side is the display panel 21, the optical sheet group 22, the light guide plate 23, and the reflection sheet 24, respectively. Are located on the back side of the four corners in the peripheral part and the back side of the center part in the left-right direction of the upper side part and the lower side part. As a result, the four corners of each of the display panel 21, the optical sheet group 22, the light guide plate 23, and the reflection sheet 24 and the center in the left-right direction of each of the upper and lower sides are pressed toward the front cabinet 15.

  Moreover, the part from the radial direction center part of each 1st-8th board part 31a-31h of the chassis main body 31 to a base end side is the display panel 21, the optical sheet group 22, the light-guide plate 23, and the reflection sheet 24, respectively. It is located on the back side of a part of the central part in the vertical and horizontal directions. As a result, the display panel 21, the optical sheet group 22, the light guide plate 23, and the reflection sheet 24 are partially pressed toward the front cabinet 15 side in the vertical and horizontal central portions. For example, the display panel 21, the optical sheet group 22, the light guide plate 23, and the reflection sheet 24 are part of the central portion in the vertical and horizontal directions, for example, the display panel 21, the optical sheet group 22, the light guide plate 23, and the reflection sheet 24, respectively. Is the center of the left half (or right half) in the vertical and horizontal directions.

After the backlight chassis 3 is attached, the circuit boards 11 to 13 are attached to the backlight chassis 3 respectively.
The four corners of the receiving board 11 are bolted to mounting protrusions 32 protruding from the first to fourth plate portions 31a to 31d through the insertion holes 1a, 1a,... And the insertion holes 32a, 32a.
Similarly, the four corners of the signal processing board 12 are bolted to mounting protrusions 32 protruding from the fourth and seventh plate portions 31d and 31g, respectively.
Similarly, the four corners of the power supply board 13 are bolted to attachment protrusions 32 protruding from the fifth to eighth plate portions 31e to 31h.

  The circuit boards 11 to 13 attached to the backlight chassis 3 as described above are all separated from the chassis body 31 by the amount of protrusion of the attachment protrusion 32 from the chassis body 31.

Next, the rear cabinet 16 will be described.
On the inner surface of the rear cabinet 16, a plurality (23 in FIG. 4) of cylindrical holding protrusions 18 arranged in a horizontal posture are provided. The projecting positions of the holding projections 18, 18,... Correspond to the positions where the openings 310 and the cutout portions 311 to 316 are formed, and are positions that do not interfere with the circuit boards 11 to 13.

  The rear cabinet 16 covers the back side of the backlight chassis 3. At this time, the front end surfaces of the holding projections 18, 18,... Contact the back surface of the reflection sheet 24 through any of the openings 310 and the cutout portions 311 to 316, and the optical sheet group 22, the light guide plate 23, and the reflection The sheet 24 is pressed against the display panel 21 side. As a result, the optical sheet group 22, the light guide plate 23, and the reflection sheet 24 are held between the holding protrusions 18, 18,... And the display panel 21.

  Since the display device 10 as described above is provided with the opening 310 and the notched portions 311 to 316 in the backlight chassis 3, it can be lighter than when these are not provided. Further, since the amount of material for forming the backlight chassis 3 is small, the material cost can be reduced.

  The display panel 21, the optical sheet group 22, the light guide plate 23, and the reflection sheet 24 are held between the front cabinet 15 and the chassis main body 31 of the backlight chassis 3, and the optical sheet group 22, the light guide plate 23, and the reflection sheet. 24 is held between the display panel 21 and the holding projections 18, 18,... Of the rear cabinet 16. Therefore, the display panel 21, the optical sheet group 22, the light guide plate 23, and the reflection sheet 24 can be reliably held inside the housing 100.

  The arrangement positions of the mounting projections 32, 32,... Of the backlight chassis 3 are provided when the liquid crystal display device described in Patent Document 1 includes a frame provided in place of the backlight chassis 3, and the chassis main body 31 is an X-shaped plate. The degree of freedom of design is high compared to any of the cases where the shape is formed. In other words, the mounting positions of the circuit boards 11 to 13 have a high degree of design freedom. Therefore, each of the circuit boards 11 to 13 can be stably attached to the backlight chassis 3 at an appropriate location.

By the way, a circuit board included in a conventional liquid crystal display device is attached to a diaphragm-shaped portion that protrudes to the back side of a conventional backlight chassis.
On the other hand, in the case of the display device 10, it is difficult to perform drawing processing on the chassis main body 31. On the other hand, the chassis main body 31, the mounting projections 32, 32,... And the latching portions 33, 33,... Are formed on the metal plate to be the backlight chassis 3 by, for example, pressing and bending. It is easy.
Since the chassis main body 31 has an XX plate shape, the strength against bending and twisting is high. As a result, unnecessary deformation of the display device 10 can be suppressed.

  The frame included in the liquid crystal display device described in Patent Document 1 has, for example, a rectangular frame shape or a U-shaped frame shape. On the other hand, the chassis body 31 of the backlight chassis 3 included in the display device 10 is not limited to an XX plate shape, and may be a rice plate shape, a circular plate shape, or the like. Also, the shape is not limited to two left and right XX plates, but two upper and lower XX plates, three left and right XXX plates, or four upper and lower four left and right X plates Etc. Furthermore, if the circuit boards 11 to 13 can be arranged without any particular problem, the chassis main body 31 may have an X-shaped plate shape.

  The shape of the backlight chassis 3 may be designed according to the weight of the backlight chassis 3 and the strength against load, impact, deflection, and the like, and further, the arrangement positions of the circuit boards 11 to 13. For example, it is possible to further reduce the weight by forming a through hole at an appropriate location of the chassis main body 31 or thinning only an appropriate location of the chassis main body 31 to such an extent that the strength is not insufficient. .

The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is not intended to include the above-described meanings, but is intended to include meanings equivalent to the claims and all modifications within the scope of the claims.
In addition, as long as the effect of the present invention is obtained, the display device 10 may include components that are not disclosed in the embodiment.
The constituent elements (technical features) disclosed in each embodiment can be combined with each other, and a new technical feature can be formed by the combination.

10 Display device 11 Reception board (circuit board)
12 Signal processing board (circuit board)
13 Power supply board (circuit board)
DESCRIPTION OF SYMBOLS 15 Front cabinet 16 Rear cabinet 17 Covering part 18 Holding protrusion 21 Display panel 21a Display surface 24 Reflective sheet 25 LED (light source)
31 Chassis body (holder)
310 Openings 311 to 316 Notch-shaped portion 32 Mounting projection 33 Hook

Claims (5)

A display panel having a display surface on the front side;
A front cabinet surrounding the periphery of the display surface;
In a display device comprising: a holding body that holds the display panel between the front cabinet;
The holding body has a plate shape in which a plurality of openings and / or cutout portions are provided,
A part of the front surface of the holding body is located on the back side of at least a part of the peripheral edge of the display panel, and the other part of the front surface of the holding body is at least a part of the center in the surface direction of the display panel. A display device which is located on the back side.   The display device according to claim 1, wherein the holding body has a shape in which a plurality of X-shaped plates are integrally juxtaposed in the surface direction of the display panel. A light source;
A reflective sheet that is disposed on the back side of the display panel and on the front side of the holding body, and reflects light emitted from the light source toward the display panel;
A rear cabinet covering the back side of the holding body,
3. The rear cabinet is provided with a holding projection for holding the reflective sheet between the rear panel and the display panel through the opening or the cutout portion. Display device. A circuit board for displaying an image on the display panel;
The plate-like attachment protrusion which is projected integrally with the said holding body so that it may protrude from the said holding body to the back side, and to which the said circuit board is attached is further equipped with these. The display device according to any one of the above. A latching portion is provided on one side of the holding body,
The display device according to any one of claims 1 to 4, wherein a hooking portion to which the hooking portion is hooked is provided on one side of the front cabinet.

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