JP2017203930A - Liquid crystal display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a holding structure of a liquid crystal display module that reduces the thickness of an exterior frame as much as possible and prevents the occurrence of display unevenness.SOLUTION: There is provided a liquid crystal display comprising a front-side holding member and a back-side holding member holding a liquid crystal display module, wherein the front-side holding member includes an opening from which an image display portion of the liquid crystal display module is exposed; the back-side holding member is provided with a convex plane in contact with the back face of the liquid crystal display module at substantially the center thereof, and the convex plane is not in contact with a peripheral part of the liquid crystal display module.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a liquid crystal display device having a holding structure for holding a liquid crystal display module.

  Liquid crystal display devices are used for applications such as televisions, computer terminals, advertising media, medical equipment, and video production. In recent years, the demand for thinning has been increasing, and the liquid crystal display module in the liquid crystal display device has also been made thin and light, and there are various methods for holding and fixing it so as to minimize the influence on the image quality. Has been taken. One of the effects on image quality is display unevenness, which is caused by deformation and warping of the display panel depending on the use environment and use method of the display panel constituting the display surface of the liquid crystal display device.

  Due to these external factors, such as when the temperature of the display panel rises due to heat generation of the liquid crystal display device, and warps due to thermal deformation, environmental conditions such as use in a high temperature environment, and impact The display panel may be deformed or warped. Due to the occurrence of the warp, stress is generated in the display panel, and display unevenness occurs. In particular, when the panel has a high definition, a large size, and outdoor use, the influence of the image quality due to the warp of the display panel becomes remarkable and becomes a problem.

  For this reason, in the technique disclosed in Patent Document 1 as a conventional technique, the frame that holds the liquid crystal display module is integrated with the back side exterior and is fixed to the front side exterior, thereby having a strong rigidity against deformation. it can.

JP 2002-221706 A

  However, in Patent Document 1, since the entire area other than the display surface of the liquid crystal display module is fixed, a deformation stroke is not secured, and display unevenness is likely to occur when an external force is applied to the display panel. In particular, a thin liquid crystal display module has a weak strength against deformation, and thus has a problem that display unevenness is likely to occur when an image is displayed.

  The present invention has been made in view of the above, and an object thereof is to provide a liquid crystal display device capable of reducing display unevenness caused by deformation of a thin liquid crystal display module.

In order to achieve the above object, a liquid crystal display device according to the present invention includes:
A liquid crystal display module for displaying an image, and a front side holding member and a back side holding member for sandwiching the liquid crystal display module,
The front-side holding member has an opening that exposes an image display portion of the liquid crystal display module,
The back-side holding member is provided with a convex plane in contact with the back surface of the liquid crystal display module at a substantially center, and the convex plane does not contact the peripheral portion of the liquid crystal display module.

  ADVANTAGE OF THE INVENTION According to this invention, the liquid crystal display device which can improve the display nonuniformity accompanying a curvature generation | occurrence | production by giving a liquid crystal display module periphery a freedom degree can be provided.

It is a front view of the liquid crystal display device of this invention. 1 is an exploded perspective view according to a first embodiment of a liquid crystal display device of the present invention. FIG. 3 is a perspective view of a back side holding member according to the first embodiment. FIG. 2 is a cross-sectional view taken along the line AA in FIG. FIG. 6 is a schematic diagram of a periphery of a back side holding member and a liquid crystal display module according to a second embodiment. FIG. 6 is a schematic diagram of a periphery of a back side holding member and a liquid crystal display module according to a second embodiment. FIG. 10 is a perspective view of a back side holding member according to a third embodiment.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

Example 1
Embodiments of the present invention are described in detail below.

  1 and 2 are a front view and an exploded perspective view of the liquid crystal display device of the present invention, and FIG. 3 is a perspective view of a back side holding member according to the first embodiment of the liquid crystal display device of the present invention.

  The liquid crystal display device of the present invention includes a liquid crystal display module 1 that displays an image, a front side holding member 4 and a back side holding member 3 that sandwich the liquid crystal display module. A round hole 33 is formed in the back side holding member 3 and is configured to be coupled to the front side holding member 4. In the liquid crystal display module 1, terminals extending from the back surface are connected to the power supply board 6 through an opening hole 32 formed in the back side holding member 3, and the power supply board 6 is held by the board holder 5 and the board holder 5 is held by the back side. The power supply substrate 6 is covered with a substrate cover 7 fixed to the member 3 and fixed to the back side holding member 3.

  The liquid crystal display module 1 includes a liquid crystal panel that displays an image, a drain substrate that drives the liquid crystal panel, a light guide plate that uniformly emits light, an edge light that makes light incident from the side surface of the light guide plate, and an optical that improves brightness It is comprised by the sheet | seat (not shown). The materials of the rear side holding member 3, the front side holding member 4, the substrate holder 5, and the substrate cover 7 that are exterior parts may be metal, resin, or other materials.

  The back side holding member 3 shown in FIG. 3 is arranged on the back side of the liquid crystal display module 1. The back side holding member 3 is provided with ribs 31 around the edges, whereby the position in the in-plane direction of the liquid crystal display module 1 can be determined, and movement within the housing can be limited. A rectangular convex plane 34 is arranged at the approximate center of the back side holding member 3, and the liquid crystal display module 1 is held between the convex plane 34 and the front side holding member 4 to determine the position in the thickness direction. , Can limit the movement in the housing.

  The front-side holding member 4 is disposed in front of the liquid crystal display module 1 and has an opening that exposes an image display portion of the liquid crystal display module 1. An elastic member 2 may be disposed between the front side holding member 4 and the liquid crystal display module 1 for the purpose of reducing the pressure on the liquid crystal panel surface of the liquid crystal display module 1.

  The convex flat surface 34 is disposed substantially at the center of the back-side holding member, has a rectangular shape, is in contact with the back surface of the liquid crystal display module, but is not in contact with the peripheral portion of the liquid crystal display module 1. Since the convex plane 34 does not contact the peripheral portion of the liquid crystal display module 1, a space is created in the peripheral portion of the liquid crystal display module. When warpage occurs in the liquid crystal display module 1 due to this space, it is possible to allow deformation, reduce pressure on the liquid crystal panel, and suppress display unevenness.

  Moreover, since the convex flat surface 34 is in contact with the back surface of the liquid crystal display module 1 by using a metal material having high heat dissipation performance as the material of the back side holding member 3, the heat dissipation performance of the liquid crystal display device can be enhanced.

  In the present invention, the method of holding the liquid crystal display module in the in-plane direction and the thickness direction is sandwiched between the ribs, the convex plane, and the front-side holding member, so that the cost can be reduced by reducing the number of screws used.

(Example 2)
FIG. 5 is a schematic view of the periphery of the back side holding member and the liquid crystal display module according to the second embodiment of the liquid crystal display device of the present invention.

  The convex flat surface 34 located substantially at the center of the back side holding member 3 and disposed on the back side of the liquid crystal display module 1 is not in contact with the peripheral portion of the liquid crystal display module 1.

  As shown in FIG. 5, the convex plane 34 substantially at the center of the back side holding member 3 may be configured such that a buffer member 8 such as a heat conducting member is disposed between the liquid crystal display module and the convex plane.

  When the liquid crystal display module 1 is in contact with only the convex plane 34 of the back side holding member 3, it is difficult for the entire area of the convex plane to contact the liquid crystal display module without a gap, and the heat dissipation performance may be reduced.

  However, by disposing a cushioning material such as heat radiation rubber that combines elastic force and heat dissipation performance between the liquid crystal display module and the convex plane, the gap between the liquid crystal display module and the convex plane is reduced as much as possible, and the liquid crystal with improved heat dissipation performance A display device can be provided.

  Further, as shown in FIG. 6, the convex plane 44 may be constituted by a member different from the back side holding member 40. Only the convex plane 44 may be composed of a material having high heat dissipation performance such as copper or another member such as heat dissipation rubber. Furthermore, the same function may be given and used by processing a sheet metal and producing a convex plane.

(Example 3)
FIG. 7 is a front view of a back-side holding member according to the third embodiment of the liquid crystal display device of the present invention.

  The convex plane located at the approximate center of the back side holding member and arranged on the back side of the liquid crystal display module is not in contact with the peripheral portion of the liquid crystal display module, but the shape of the convex plane is not rectangular. Also good.

  As shown in FIG. 7, it does not contact the periphery of the liquid crystal display module, but the shape of the convex plane is a rib shape as shown in FIG. 7 (a), a pin shape as shown in FIG. 7 (b), or A hollow shape as shown in FIG. Moreover, the shape of these convex planes may be comprised as another member. The shape is not limited to the above as long as there is a space in the periphery of the liquid crystal display module and the shape can allow deformation when deformed.

1 LCD module, 2 elastic member, 3 back side holding member, 4 front side holding member,
5 Board holder, 6 Power board, 7 Board cover, 34 Convex plane

Claims (4)

It has a front side holding member and a back side holding member for holding the liquid crystal display module,
The front-side holding member has an opening that exposes an image display portion of the liquid crystal display module,
The liquid crystal display device according to claim 1, wherein the back side holding member is provided with a convex plane in contact with the back surface of the liquid crystal display module at the center, and the convex plane does not contact the peripheral portion of the liquid crystal display module. The liquid crystal display device according to claim 1, wherein another member is disposed between the convex plane and the liquid crystal display module. The liquid crystal display device according to claim 1, wherein the convex plane is constituted by another member. The liquid crystal display device according to claim 1, wherein the shape of the convex plane is not limited to a rib shape, a pin shape, a hollow shape, or a rectangular shape.