JP2010002616A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device which is equipped with a diffusion plate for diffusing the light cast toward a display panel for displaying a video, and can support the diffusion plate even when the diffusion plate shrinks. <P>SOLUTION: The display device is configured such that a supporting surface 9c for supporting the edge of the diffusion plate 10 is formed at a lamp holder 9 for holding a fluorescent tube 8, and a plurality of ribs 90 are made contiguous with the supporting surface 9c to support the inner side of the edge of the diffusion plate 10 with the ribs 90. Consequently, when the diffusion plate 10 shrinks and the edge of the diffusion plate 10 disengages from the supporting surface 9c, the edge of the diffusion plate 10 is supported by the ribs 90. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display device that includes a diffusion plate that diffuses light emitted toward a display panel that displays an image, and that can support the diffusion plate even when the diffusion plate contracts.

  In general, a liquid crystal display device displays light by irradiating light from a light source onto a display panel that displays an image, and the light irradiation to the display panel is performed through a diffusion plate that diffuses light. The diffusion plate has a property of expanding and contracting by heating and cooling, and needs to be supported corresponding to the expansion and contraction.

The liquid crystal display device described in Patent Document 1 includes a frame-shaped support portion provided along the edge of the diffusion plate, and the support portion supports the edge portion of the diffusion plate over the entire circumference. A support surface is provided. The support surface has a predetermined width and can support the diffusion plate even when the diffusion plate contracts. In addition, a space is provided outside the outer periphery of the diffusion plate, and when the diffusion plate is extended, the diffusion plate is prevented from coming into contact with the support portion and generating wrinkles on the diffusion plate. For this reason, it is possible to prevent the quality of video displayed on the display panel from deteriorating due to insufficient light diffusion due to the generation of wrinkles.
JP 2007-193238 A

  In recent years, a liquid crystal display device with a narrow frame has been developed in order to increase the size of the display screen while avoiding an increase in the size of the entire liquid crystal display device. In the liquid crystal display device described in Patent Document 1, in order to narrow the frame, it is necessary to narrow the width of the support surface. However, if the width of the support surface is narrowed, the diffusion plate may come off the support surface and fall off when the diffusion plate contracts.

  The present invention has been made in view of such circumstances, and provides a display device capable of preventing the diffusion plate from falling off even if the edge of the diffusion plate is detached from the support surface that supports the edge of the diffusion plate. For the purpose.

  The display device according to the present invention includes a display panel that displays an image, and a diffusion plate that faces the display panel and diffuses light emitted from a light source toward the display panel. And a plurality of ribs arranged side by side in the longitudinal direction, and the ribs support the inside of the edges of the diffusion plate. It is characterized by that.

  In the present invention, a plurality of casings are provided along the edges of the diffusion plate, and a plurality of ribs are arranged in the longitudinal direction on the casing, and the inner sides of the edges of the diffusion plates are supported by the ribs. . For this reason, even if the diffusion plate contracts, the edge of the diffusion plate is not detached from the rib provided on the housing, and the diffusion plate is supported by the rib.

  In the display device according to the present invention, the casing includes a belt-like support surface along the longitudinal direction for supporting the edge of the diffusion plate, and the ribs are arranged in parallel in the longitudinal direction adjacent to the support surface. It is characterized by being.

  In the present invention, the casing is provided with a belt-like support surface along the longitudinal direction for supporting the edge of the diffusion plate, and the rib is adjacent to the support surface, whereby the support surface and the rib are interposed. Prevents the occurrence of steps. Further, when the diffusion plate contracts and the edge of the diffusion plate is detached from the housing, the diffusion plate is supported by the rib.

  The display device according to the present invention is characterized in that the rib and the support surface are connected.

  In the present invention, by connecting the rib and the support surface, the expansion and contraction of the diffusion plate is smoothly performed on the support surface and the rib, thereby preventing the diffusion plate from being wrinkled.

  In the display device according to the present invention, the rib includes a curved surface that swells toward the diffusion plate, and the curved surface supports an inner side of an edge of the diffusion plate.

  In the present invention, the diffuser plate bulges toward the diffuser plate, and the curved surface formed on the rib supports the inside of the edge of the diffuser plate. When the diffuser plate expands and contracts, the diffuser plate is scratched. Is prevented from occurring.

  In the display device according to the present invention, the diffusion plate has a rectangular shape, and the casing is disposed along edges of the diffusion plate facing each other.

  In the present invention, the casing is disposed along the edges of the diffusion plate facing each other to stably support the diffusion plate.

  In the display device according to the present invention, the light source is a plurality of fluorescent tubes, and a plurality of insertion ports for inserting the fluorescent tubes are arranged in parallel in a longitudinal direction on a side surface of the housing, and the insertion ports and the ribs Are adjacent to each other.

  In the present invention, the rib is adjacent to the insertion opening for inserting the fluorescent tube, and light from the fluorescent tube is sufficiently projected to a portion of the display panel that is close to the rib, Avoid shadows appearing on the display panel.

  In the display device according to the present invention, a plurality of housings are arranged along the edge of the diffusion plate, and a plurality of ribs are arranged in the longitudinal direction on the housing so that the inside of the edge of the diffusion plate is located inside. And supported by the rib. Thereby, even if the said diffuser plate shrink | contracts and the edge of the said diffuser plate remove | deviates from the said housing, the said diffuser plate can be supported by the said rib and the fall of the said diffuser plate can be prevented.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. 1 is a schematic external view showing a vertically arranged display device according to the embodiment, FIG. 2 is a schematic side sectional view taken along line II-II in FIG. 1, and FIG. 3 is a schematic view taken along line III-III in FIG. FIG. 4 is a schematic perspective view of a lamp holder, a first panel holding rod and a backlight chassis, and FIG. 5 is a schematic enlarged view of a rib.

  The illustrated display device includes a rectangular frame-shaped front cabinet 1, and the front cabinet 1 includes a rectangular opening 1b for visually recognizing a display panel 7 described later. A rectangular box-shaped rear cabinet 2 is provided on the rear side of the front cabinet 1, and two engaging recesses 2 a are provided on the upper and lower edges of the rear cabinet 2. An engaging claw portion 1a that engages with the engaging recess 2a is provided at the upper and lower edges of the front cabinet 1, and the front cabinet 1 is engaged with the engaging claw portion 1a and the engaging recess 2a. And the rear cabinet 2 are connected.

  A rectangular box-like backlight chassis 3 is provided on the front side of the rear cabinet 2. Two first panel holding rods 4 and 4 for holding the display panel 7 are provided along the front upper and lower edges of the backlight chassis 3. On the front surface of the first panel holding bar 4, the upper and lower edges of the back surface of the rectangular display panel 7 that displays an image are supported via the elastic member 5. A bezel 6 is provided over the entire front surface of the display panel 7 via an elastic member 5, and the upper and lower edges of the display panel 7 are sandwiched between the bezel 6 and the first panel holding rod 4. Has been.

  Further, as shown in FIG. 3, two bowl-shaped lamp holders 9, 9 for holding the fluorescent tube 8 are provided along the front left and right edges of the backlight chassis 3. The lamp holder 9 includes a plurality of socket portions 9 a, 9 a,..., 9 a that are arranged in parallel in the vertical direction along the front left and right edges of the backlight chassis 3. A plurality of fluorescent tubes 8, 8,..., 8 are held between the portions 9a, 9a,. Further, a diffusion plate 10 for diffusing light is arranged on the front side of the fluorescent tubes 8, 8,.

  The lamp holder 9 covers a front surface of the socket portions 9a, 9a,..., 9a and includes a front plate portion 9b having a vertical dimension longer than a horizontal dimension. The front plate portion 9b is disposed along the entire left edge portion or the entire right edge portion of the diffuser plate 10, and the front surface plate portion 9b has a front surface (hereinafter referred to as a support surface) 9c. Supports the entire left and right edges. Outside the left and right edge portions of the diffusion plate 10, a space is provided to prevent the diffusion plate 10 from wrinkling when the diffusion plate 10 expands and contracts.

  The lamp holder 9 includes a side plate portion 9d that is connected to the front plate portion 9b and covers the side surfaces of the socket portions 9a, 9a,. The vertical dimension of the side plate part 9d is longer than the depth dimension, and a plurality of insertion ports 9e, 9e,..., 9e are arranged in parallel in the vertical direction on the side plate part 9d. The fluorescent tubes 8, 8,..., 8 are inserted into the insertion ports 9e, 9e,..., 9e and are held by the socket portions 9a, 9a,.

  A plurality of plate-like ribs 90, 90,..., 90 whose left and right dimensions are longer than the depth dimension are equally arranged in the vertical direction in the lamp holder 9. The ribs 90, 90, ..., 90 are located between the insertion ports 9e, 9e, ..., 9e and the support surface 9c, and the insertion ports 9e, 9e, ..., Adjacent to 9e. A front surface 90a of the rib 90 (hereinafter referred to as a rib front surface) is continuous with the support surface 9c. The rib front surface 90a has a curved surface that swells toward the front side, and the top surface portion of the rib front surface 90a is substantially flush with the support surface 9c. Further, the corner portion of the rib 90 connected to the rib front surface 90a is chamfered. The rib front surface 90 a supports the inner sides of the left and right edges of the diffusion plate 10.

  The lamp holder 9 includes an extension plate portion 9f extending from the front plate portion 9b toward the opposite side of the socket portions 9a, 9a,..., 9a and parallel to the backlight chassis 3. . For holding the left and right edges of the display panel 7 on the front surface of the extension plate portion 9f of the lamp holder 9 arranged on the right side and on the front surface of the extension plate portion 9f of the lamp holder 9 arranged on the left side. Two second panel holding rods 11 are provided along the left and right edges of the display panel 7, respectively.

  The display panel 7 is arranged in front of the second panel holding rods 11, 11, and left and right edge portions of the display panel 7 are connected to the second panel holding rods 11, 11 via elastic members 5. It is supported. Further, the bezel 6 is provided through the elastic member 5 over the entire front surface of the display panel 7, and the left and right edges of the display panel 7 are formed by the bezel 6 and the second panel holding rods 11 and 11. The part is pinched.

Next, the function of the rib will be described. FIG. 6 is a schematic partial plan view showing the diffusion plate 10 before coming off the support surface and the diffusion plate 10 after coming off.
As shown in FIG. 6A, when the diffusion plate 10 is not detached from the support surface 9c, the left and right edges of the diffusion plate 10 are supported by the support surface 9c and the rib front surface 90a. Yes. When the diffusion plate 10 is contracted by cooling and the right and left edge portions of the diffusion plate 10 are disengaged from the support surface 9c, the left and right edge portions of the diffusion plate 10 are as shown in FIG. Supported by the rib front surface 90a, the diffusion plate 10 does not fall off the lamp holders 9, 9.

  In the display device according to the embodiment, even if the edge of the diffusion plate 10 is detached from the support surface 9c due to the contraction of the diffusion plate 10, the diffusion plate 10 is formed on the rib front surface 90a connected to the support surface 9c. The diffusion plate 10 can be prevented from falling off.

  The rib front surface 90a is located on the back side of the support surface 9c, and there is a step between the support surface 9c and the rib front surface 90a, and the edge portion of the diffusion plate 10 is located on the rib front surface 90a. Sometimes, the edge portion of the diffusing plate 10 cannot move from the rib front surface 90a to the support surface 9c unless the level difference is overcome. In the display device according to the embodiment, the diffusion plate 10 extends without causing a step between the support surface 9c and the rib front surface 90a by making the support surface 9c and the rib front surface 90a adjacent to each other. In this case, the edge portion of the diffusion plate 10 can be easily moved from the rib front surface 90a to the support surface 9c.

  Further, by connecting the support surface 9c and the rib front surface 90a, the diffusion plate 10 is smoothly expanded and contracted on the support surface 9c and the rib front surface 90a, and the diffusion plate 10 is wrinkled. It is possible to prevent this from happening and to prevent the video quality from deteriorating.

  Further, by making the rib front surface 90a a curved surface and chamfering the corners of the rib 90 connected to the rib front surface 90a, the diffusion plate 10 can be prevented from being damaged when the diffusion plate 10 expands and contracts. It can be avoided that the service life of the diffusion plate 10 is shortened.

  In addition, by providing the lamp holders 9 and 9 along the left and right edges of the diffusion plate 10, the diffusion plate 10 can be stably supported by the support surfaces 9c and 9c.

  The rib 90 is adjacent to the insertion port 9 e and is provided in the immediate vicinity of the fluorescent tube 8. Therefore, the portion of the display panel 7 where the rib 90 is approaching is sufficiently projected by the fluorescent tube 8, and the shadow of the rib 90 does not appear on the display panel 7. Even if it appears, the shadow of the exposed rib 90 is thin, and it is difficult for the user to perceive the shadow of the rib 90. Therefore, the presence of the rib 90 does not affect the quality of the video displayed on the display panel 7.

  Needless to say, the left and right edges of the diffusion plate 10 are supported by the support surface 9c and the rib front surface 90a even when the diffusion plate 10 is arranged in a state of being biased to the right side or the left side. Further, a support member that supports the upper and lower edge portions of the diffusion plate 10 may be provided, and ribs may be provided on the support member so that the upper and lower edge portions of the diffusion plate 10 are supported by the ribs. Further, the supporting member and the lamp holders 9 and 9 may be connected or integrated to form a frame, and the entire edge of the diffusion plate 10 may be supported by the frame. Further, a white diode may be used in place of the fluorescent tube 8.

  The display device includes a drive circuit (not shown) for driving the display panel 7. Power is supplied from an inverter circuit (not shown) to the drive circuit, and the display panel 7 is driven by power supply to the drive circuit. A video is displayed.

1 is a schematic external view showing a vertically arranged display device according to an embodiment. FIG. 2 is a schematic side sectional view taken along line II-II in FIG. 1. FIG. 3 is a schematic plan sectional view taken along line III-III in FIG. 1. It is a schematic perspective view of a lamp holder, a first panel holding rod and a backlight chassis of the display device according to the embodiment. FIG. 4 is a schematic enlarged view of a rib of the display device according to the embodiment. It is a typical partial plane sectional view showing the diffusion plate before removing from the support surface, and the diffusion plate after removing from the display device concerning an embodiment.

Explanation of symbols

1 Front cabinet 2 Rear cabinet 7 Display panel 8 Fluorescent tube (light source)
9 Lamp holder (frame)
9c Support surface 10 Diffusion plate 90 Rib 90a Rib front

Claims (6)

In a display device comprising a display panel for displaying an image, and a diffusion plate facing the display panel and diffusing light emitted from a light source toward the display panel,
Comprising a plurality of housings arranged along an edge of the diffusion plate;
A plurality of ribs are juxtaposed in the longitudinal direction on the housing,
The display device according to claim 1, wherein the rib supports an inner side of an edge of the diffusion plate. The housing includes a belt-like support surface along a longitudinal direction for supporting an edge of the diffusion plate,
The display device according to claim 1, wherein the rib is juxtaposed in the longitudinal direction adjacent to the support surface.   The display device according to claim 2, wherein the rib and the support surface are connected to each other. The rib includes a curved surface that swells toward the diffusion plate,
The display device according to any one of claims 1 to 3, wherein the curved surface supports an inner side of an edge of the diffusion plate. The diffusion plate has a rectangular shape,
The display device according to claim 1, wherein the casing is disposed along edges of the diffusion plate facing each other. The light source is a plurality of fluorescent tubes;
A plurality of insertion ports for inserting the fluorescent tubes are juxtaposed in the longitudinal direction on the side surface of the housing,
The display device according to claim 1, wherein the insertion port and the rib are adjacent to each other.

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