JPH05165013A - Liquid crystal display - Google Patents

Abstract

PURPOSE:To provide an exterior structure which prevents a liquid crystal panel from being deformed and improves shock resistance. CONSTITUTION:A liquid crystal panel comprises a pair of glass substrates 2 and 3 containing transparent electrodes in their inner surfaces, a liquid crystal panel 1 containing a liquid crystal layer pinched between the substrates, and an exterior case 10 fixed on one surface side of the liquid crystal panel via an adhesive 15 made of an elastic material. The stress applied to the exterior case 10 is absorbed by the adhesive 15 so that it is not transmitted to the liquid crystal panel 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device used for image display in a personal computer, a word processor, a TV, a viewfinder of a video camera or the like. More specifically, the present invention relates to a mounting structure of a liquid crystal panel and an outer case that form a liquid crystal display device.

[0002]

2. Description of the Related Art First, a general structure of a liquid crystal panel will be briefly described with reference to FIG. The liquid crystal panel 1 is composed of a pair of glass substrates 2 and 3 arranged to face each other with a predetermined gap, and a liquid crystal layer 4 sealed and filled in the gap. A transparent electrode 5 made of ITO or the like is patterned on the inner surface of each substrate. By applying a driving voltage between the transparent electrodes facing each other, the transmittance of the liquid crystal layer 4 is changed and an image is displayed. A pair of glass substrates 2
And 3 are bonded to each other via a sealer 6, the gap between both substrates is uniformly controlled by the spacer particles 7, and the liquid crystal layer 4 has a uniform thickness. When an external force is applied to the liquid crystal panel 1, the gap size is changed, and the electro-optical characteristics of the liquid crystal layer 6 are locally changed to cause display unevenness, thus deteriorating the image quality. Further, the glass substrate itself constituting the liquid crystal panel 1 may be damaged when an excessive external force is applied.

In order to prevent deformation of the liquid crystal panel and protect it from external force, the liquid crystal panel is incorporated into an outer case to form a liquid crystal display device. FIG. 4 shows the structure of a conventional liquid crystal display device. Generally, a structure is adopted in which the liquid crystal panel 1 is sandwiched by a pair of exterior cases 8 and 9 from both upper and lower sides and screwed. The liquid crystal panel 1 is housed in the recess provided in the lower outer case 8, and the upper outer case 9 closes the lid. That is, the liquid crystal panel 1 is mechanically sandwiched and fixed by applying pressure with screws or the like. Further, in order to protect the liquid crystal panel 1 housed inside, it is usual to use a material having a high rigidity and a thick and heavy outer case 8 and 9.

[0004]

Although the exterior structure shown in FIG. 4 seems to be practical at first glance, it actually contains various problems or problems. First, since the liquid crystal panel 1 is sandwiched from the upper and lower surfaces, the outer case itself is distorted or deformed by pressure. Since this distortion or deformation also affects the liquid crystal panel 1, the display quality is degraded. Further, even when the finishing accuracy of the outer case is not high, distortion and deformation occur due to the mismatch with the liquid crystal panel, which causes display unevenness. Furthermore, since the conventional exterior case structure is a rigid structure that wraps the liquid crystal panel 1,
When a shock or the like is applied to the case, the external force is not absorbed, so that the case is directly applied to the liquid crystal panel and the glass substrate is damaged.

[0005]

In view of the above-mentioned problems or problems of the conventional technology, the present invention can prevent the distortion and deformation of the liquid crystal panel, and can protect the liquid crystal from impact force from the outside. The purpose is to provide an exterior structure that can effectively protect the panel. In order to achieve such an object, a liquid crystal display device has a liquid crystal panel having a pair of glass substrates having a transparent electrode on the inner surface and a liquid crystal layer sandwiched between the substrates, and an elastic material on one side of the liquid crystal panel. It is configured with an exterior case that is bonded via. The liquid crystal panel is supported by the elastic material in a floating state in the outer case and can directly absorb the impact force from the outside. The liquid crystal panel is supported only on one side and the other side is open. Unlike the conventional structure in which it is sandwiched from above and below, excessive stress is not applied to the liquid crystal panel.

[0006]

According to the exterior structure of the present invention, the liquid crystal panel can be attached to the exterior case without any distortion or deformation. Further, when the outer case is attached to the body of a device such as a personal computer or a word processor, even if the outer case itself is distorted or deformed, the elastic material serves as a damper, so that the liquid crystal panel is not adversely affected. Further, even if a mechanical force such as an impact force is applied to the outer case, the elastic material absorbs it, so that the liquid crystal panel can be prevented from being damaged.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic sectional view showing an embodiment of a liquid crystal display device according to the present invention. As shown,
The liquid crystal display device includes a liquid crystal panel 1 and an outer case 10. The liquid crystal panel 1 has a general structure as shown in FIG. That is, the liquid crystal panel 1 is composed of a pair of glass substrates 2 and 3 having transparent electrodes on the inner surface and a liquid crystal layer sandwiched between the substrates.

On the other hand, the outer case 10 has a recess 11 for accommodating the liquid crystal panel 1 and a flange 12.
A screw hole 13 is cut in the flange 12, and the flange 12 is attached to the housing of the device body using a screw. Recess 11
An opening 14 is provided in the bottom of the liquid crystal panel 1 to expose the image surface of the liquid crystal panel 1. The outer case 10 can be manufactured accurately and in large quantities at low cost by injection molding using resin or the like. Alternatively, the outer case 10 may be manufactured by pressing, punching, or drawing a metal plate material.

The liquid crystal panel 1 is fixed to the outer case 10 with an adhesive 15 made of an elastic material. As the adhesive 15, for example, room temperature curable silicone rubber can be used. Since this silicone rubber has a predetermined adhesive strength and has outstanding flexibility and elasticity, it can absorb external force applied to the liquid crystal panel 1, strain deformation, and the like. Further, since it is a room temperature curable type, no heat treatment is required and no thermal stress is applied to the liquid crystal panel 1. As a material of the adhesive 15, various materials having a predetermined elasticity can be used instead of the room temperature curable silicone rubber. For example, an ultraviolet curable elastic acrylic resin can be used. Since it is an ultraviolet curing type, it does not require heat treatment and does not give thermal stress to the liquid crystal panel.

When the liquid crystal panel 1 is bonded to the outer case 10, first, a predetermined amount of the adhesive 1 is applied along the inner wall of the recess 11.
Apply 5. Then, the liquid crystal panel 1 is inserted into the recess 11. An adhesive 15 is filled between the outer peripheral surface of the liquid crystal panel 1 and the inner wall of the outer case 10. In order to insert the liquid crystal panel 1, a predetermined margin is provided in advance in the plane dimension of the recess 11. The liquid crystal panel 1 is an adhesive 1 having elasticity.
It is supported by 5 in a floating state. As a result, most of the stress applied to the outer case 10 is absorbed by the adhesive 15, so that the liquid crystal panel 1 is not substantially stressed. Further, unlike the conventional case, the liquid crystal panel 1 is supported and fixed only from the direction of the lower glass substrate 2, and the upper glass substrate 3 is in an open state. Unlike the conventional method of sandwiching the liquid crystal panel from above and below, no stress is applied in the thickness direction of the liquid crystal panel 1. Further, since the number of parts of the outer case 10 itself is smaller than that of the conventional case, it is possible to reduce the size and weight of the liquid crystal display device.

FIG. 2 shows another embodiment of the liquid crystal display device according to the present invention. Since the basic structure is similar to that of the embodiment shown in FIG. 1, the same components are designated by the same reference numerals to facilitate understanding. Since the recess 11 provided in the outer case 10 has a depth substantially equal to the total thickness of the liquid crystal panel 1, the liquid crystal panel 1 can be accommodated substantially completely from one side. Further, the thickness of the bottom portion 16 of the outer case 10 is thin, and the outer case 10 has springiness or flexibility. Therefore, the stress applied to the liquid crystal panel 1 can be effectively absorbed together with the adhesive 15 made of an elastic material. The tip 17 of the bottom portion 16 receives the lower glass substrate 2. At the same time, the tip 17 serves as a stopper,
The adhesive 15 having fluidity is prevented from flowing out.

[0012]

As described above, according to the present invention, only one side of the liquid crystal panel is supported by the outer case, and an adhesive made of an elastic material is interposed between the liquid crystal panel and the outer case. is doing. Therefore, the stress applied to the outer case is absorbed by the adhesive and does not affect the liquid crystal panel itself, so that display unevenness due to panel deformation can be prevented and the image quality can be improved.
Further, since it is not necessary to give rigidity to the outer case itself as in the conventional case, there is an effect that the liquid crystal display device can be downsized and lightened. Furthermore, the impact force applied from the outside can be absorbed by the adhesive made of the elastic material, so that the impact resistance of the liquid crystal display device is improved. In addition, since the number of parts of the outer case is smaller than that of the conventional case, the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of a liquid crystal display device according to the present invention.

FIG. 2 is a schematic cross-sectional view showing another embodiment of the liquid crystal display device according to the present invention.

FIG. 3 is a cross-sectional view showing a general structure of a liquid crystal panel.

FIG. 4 is a cross-sectional view showing an example of a conventional liquid crystal display device.

[Explanation of symbols]

 1 Liquid Crystal Panel 2 Glass Substrate 3 Glass Substrate 10 Exterior Case 11 Recess 15 Adhesive

Claims (1)

[Claims] 1. A liquid crystal panel having a pair of substrates each having a transparent electrode on its inner surface and a liquid crystal layer sandwiched between the substrates,
A liquid crystal display device comprising an outer case bonded to one side of the liquid crystal panel via an elastic material.