JPH05100231A - Production of liquid crystal display device - Google Patents

Abstract

PURPOSE:To prevent the generation of unequal display and light drop-out at the margin of an effective display range. CONSTITUTION:A material which is softer than the hardness of gap control materials 6 to be sprayed off the effective display range C is used for the gap control materials 5 to be sprayed within the effective display range C of the liquid crystal display element.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a liquid crystal display device.

[0002]

2. Description of the Related Art A conventional method for manufacturing a liquid crystal display device of this type is, as shown in FIG.
In order to hold the gaps at a predetermined interval, gap control materials 5a and 5b of the same diameter and the same material are sprayed on the entire surface of the cell by a wet or dry method.

In a normal liquid crystal cell, the transparent conductive film 2
Are arranged on the upper and lower transparent substrates 1 and 1 in the effective display range A, and are arranged on either one of the upper and lower sides in the terminal routing portion B. In addition, 3 is an alignment film, 4 is upper and lower transparent substrates 1, 1
Represents an adhesive for fixing.

[0004]

However, in the conventional technique, the gap control material of the same diameter and the same material is dispersed over the entire surface of the cell, and the effective display area A and the terminal routing portion B are arranged at the same interval. However, since the thickness of the transparent conductive film 2 is about 0.2 to 0.25 μm, it is near the boundary between the effective display range A and the terminal routing portion B, that is, at the edge of the effective display range A, as shown in FIG. Thus, the transparent substrates 1 and 1 have a structure in which they are bent.

Therefore, a larger load is applied to the gap control material 5b at the edge of the effective display range A, the gap control material 5b bites into the alignment film 3 and the transparent conductive film 2, and the gap control material 5b is removed. Due to the deformation, there is a problem that the interval between the upper and lower transparent substrates in the deformed portion becomes narrow.

Further, in a liquid crystal cell having such a deformed portion, when displaying, a display color unevenness and light missing occur at the edge of the effective display range A, and a good display cannot be obtained. There is a problem.

Further, the liquid crystal cell having such a deformed portion has a problem that the threshold voltage varies.

Therefore, the present invention has been devised in view of the above-mentioned problems of the prior art. A liquid crystal display element for preventing the occurrence of display color unevenness and light dropout at the edge of the effective display range is provided. The purpose is to provide a manufacturing method.

[0009]

In order to achieve the above object, in the method of manufacturing a liquid crystal display device according to the present invention, in the liquid crystal display device, the gap control material dispersed within the effective display range is an effective display range. It is characterized by using materials that are softer than the hardness of the gap control material scattered outside and have different deformation rates.

Further, in manufacturing, when spraying gap control materials of different materials (hardness) inside and outside the effective display range, the gap control is performed by using a mask having a window having the same shape as the outside of the effective display range. It is characterized by spraying wood.

Further, in manufacturing, when a gap control material of different material (hardness) is sprayed inside and outside the effective display range, a mask having a window having the same shape as the outside of the effective display range and the effective display range portion are applied. The feature is that the gap control material is sprayed using a mask with only a window.

[0012]

[Function] Since the gap control material scattered inside and outside the effective display range has a higher deformation rate than the gap control material outside the effective display range, the cell gap on the edge of the effective display range is higher. Finished at the same interval as within the effective display range.

Therefore, the display color unevenness, the color tone unevenness at the time of off, the light dropout at the boundary portion inside and outside the effective display range do not occur, and the threshold voltage does not fluctuate in the liquid crystal cell.

[0014]

EXAMPLE An example will be described with reference to FIG.
Transparent conductive films 2 and 21 are disposed on the inner surfaces of the upper and lower transparent substrates 1 and 11 facing each other, an alignment film 3 is applied on the transparent conductive films 2 and 21, and the transparent conductive film is disposed on the terminal routing portion B. Either one of the membranes 2 and 21 is arranged.

Both ends of the upper and lower transparent substrates 1 and 11 are sealed with an adhesive (sealing material) 4 and a liquid crystal 7 is injected.

By the way, when a liquid crystal cell is manufactured, the liquid crystal cell is pressed at an appropriate pressure after the liquid crystal 7 is injected, depending on the time of curing the seal and the manufacturing conditions. There is a difference depending on the hardness, but it deforms (crushes). Therefore, the present invention positively utilizes this property.

That is, as shown in FIG. 1, in the effective display range C, the gap control material 5 which is softer than the gap control material 6 scattered in the terminal routing portion D and which is made of a material having substantially the same diameter but different deformation rates is dispersed. The gap control material 5 is deformed more than the gap control material 6 to form a uniform gap within the effective display range of the liquid crystal cell.

In this case, the gap control material 6
Are arranged only in the routing portion D outside the effective display range C.

The following may be considered as specific examples of the gap control materials 5 and 6 of the present invention. Example 1 Gap control material 5 ··· Styrene balls (eg Sekisui Fine Chemical Micropearl) Gap control material 6 ··· Silica spheres (eg Catalyst Kasei Co., Ltd. true sphere) Example 2 Gap control material 5 ··· Same as example 1 Gap control Material 6 ... Glass fiber (for example, glass fiber made by Nippon Electric Glass)

In the manufacturing process, a mask having a window having the same shape as the outside of the effective display range C is formed outside the effective display range C (terminal routing portion D) during the gap control material spraying process for manufacturing the liquid crystal cell. The gap control material 6 is sprayed by a wet or dry method.

Next, the previous mask is removed, and the gap control material 5 is similarly sprinkled in a state where only the effective display range C is covered with a window or no mask.

Further, the mask is formed by using a mask having a window having the same shape as that outside the effective display range C and a mask having only the effective display range C opened.

[0023]

Since the present invention is constructed as described above, it has the following effects. Since the deformation rates of the gap control materials scattered inside and outside the effective display range are different, the cell gap at the edge of the effective display range can be finished at the same interval as that in the effective display range.

Further, since the display color unevenness at the edge of the effective display range, the color tone unevenness at the time of off, and the light drop do not occur, and the liquid crystal cell does not change in the threshold voltage, the cell quality is improved. Can be improved.

[Brief description of drawings]

FIG. 1 is a structural diagram of a method for manufacturing a liquid crystal display device of the present invention.

FIG. 2 is a structural diagram of a conventional method for manufacturing a liquid crystal display device.

[Explanation of symbols]

 1 Transparent Substrate 11 Transparent Substrate 2 Transparent Conductive Film 21 Transparent Conductive Film 3 Alignment Film 4 Adhesive 5 Gap Control Material 6 Gap Control Material C Effective Display Range D Terminal Routing Area

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadashi Kumagai 1602-3-202 Gao-cho, Midori-ku, Yokohama-shi, Kanagawa Prefecture (72) Inventor Motoyoshi Ito 2-16-1-711 Bessho, Hachioji, Tokyo

Claims (1)

[Claims] 1. A liquid crystal display device, wherein the gap control material dispersed within the effective display range is made of a material having a different deformation rate, which is softer than the hardness of the gap control material dispersed outside the effective display range. A method for manufacturing a liquid crystal display element, comprising: