JPS6238429A - Liquid crystal display element - Google Patents

Abstract

PURPOSE:To make the gap of a large scale liquid crystal cell uniform, and to prevent a tendency for generating an air bubble by allowing to stand the titled element at a low temperature by interposing two kinds of spacers having different diameters respectively into a gap lying between the substrates. CONSTITUTION:The fibrous rigid body spacer composed of a glass fiber spacer 4 (length 20-200mu, diameter 7mu+ or -0.5mu) and the granula plastic rigid body spacer composed of a granula plastic beads spacer 5 (8mu+ or -0.5mu diameter) are mixed in a ratio of about 1:1 to form the spacer. The obtd. spacer is provided on one side substrate of a pair of the substrates attached the transparent electrode thereon. The epoxy type sealing material 3 is coated on an another substrate 2 by a screen printing process. Both substrates are laminated each other followed by heating the sealing material 3 at the prescribed temp. of about 120-150 deg.C under a pressure of 1kg/cm<2>. The liquid crystal 6 is poured into the space lying between the liquid crystal display substrates from the pouring hole 3a which is formed on the substrate 2 by cutting a part of the sealing material 2 and then is sealed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a liquid crystal display device, and in particular, the present invention relates to a liquid crystal display device, in which the gap between substrates is made uniform over the entire surface of the substrate.

It also prevents the formation of bubbles when left at low temperatures. The present invention relates to a liquid crystal display element suitable for increasing size.

[Conventional technology]

Are liquid crystal display elements generally electrodes? The pair of substrates thus formed are made to face each other with their electrode surfaces facing each other, a spacer is provided between the substrates to create a predetermined gap, the periphery is held with a heat seal, and a liquid crystal is sealed in the gap. For binding at °C, a fibrous rigid spacer or a particulate elastic spacer is used.

[Problem that the invention seeks to solve]

However, the thickness of the liquid crystal layer is usually about 5 to 15μ, but if this gap is not maintained uniformly, color unevenness will occur on the display surface, and if the liquid crystal display element is left at a low temperature below iQ℃, Air bubbles occur, resulting in poor display. Especially in liquid crystal display elements with a large display area, it is difficult to maintain uniform gaps, and air bubbles are significantly generated when left at low temperatures.

That is, when a large substrate with a display area of 10 7 or more is used and a fibrous rigid spacer is inserted into the liquid crystal.

Although the gaps between the substrates were almost uniform, bubbles were generated when left at low temperatures. In addition, when a particulate elastic spacer was used, no air bubbles were generated when left at low temperatures, but the gap between the substrates was inferior to the gap with the rigid spacer, as it had larger irregularities.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks and provide a large-sized liquid crystal display element with uniform gaps and no bubbles.

[Means for solving problems]

The structure of the present invention for achieving the above object is as follows.

In a liquid crystal display element in which a pair of substrate surfaces on which electrodes are formed are faced to each other, a spacer is provided between the substrates to form a predetermined gap, and the substrates are held by a peripheral sealing material, and a liquid crystal is sealed in the gap. , the spacer is a mixture of a finely cut fibrous rigid spacer and a particulate elastic spacer.

〔Example〕

The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a plan view of a liquid crystal display element according to the present invention in which two types of spacers of different diameters are introduced into the liquid crystal, and FIG. 2 is a sectional view of FIG. 1. A glass fiber spacer 4 (diameter 7μ±0.5μ, length 20 to 20
0μ) and particulate plastic bead spacer 5 (diameter 8μ±05μ) as a particulate elastic spacer]
: Sprayed at a ratio of 1:1. An epoxy sealant 6 is screen-printed on the other substrate 2, the two substrates are overlapped, and the sealant 3 is heated and baked at a moderate temperature of about 120 to 150°C, and heated to about 1K9/d. Apply pressure. In the liquid crystal display element produced by injecting liquid crystal 6 into the gap between the liquid crystal display substrates obtained in this way and sealing the liquid crystal 6 through the injection hole 6a formed by cutting out a part of the sealing material in the substrate 2. , the substrate gap becomes almost uniform,
When it was left at a low temperature of -30°C for about 48 hours, no bubbles were generated.

That is, in the liquid crystal display element according to the present invention, the gap between the substrates is regulated by a rigid spacer, and the generation of air bubbles is prevented by an elastic spacer having a diameter larger than that of the rigid spacer.

〔Effect of the invention〕

As explained above, the present invention introduces a completely new technical idea of inserting two types of spacers with different diameters into the gap between the substrates of a liquid crystal display element, thereby increasing the display area by 400 mm.
The gap between the large liquid crystal cells, which is larger than 1.5 mm, is uniform, and it is possible to prevent the formation of bubbles when left at low temperatures.

[Brief explanation of drawings]

FIG. 1 is a plan view of a liquid crystal display element of the present invention in which two types of spacers with different diameters are inserted into the substrate gap, and FIG. 2 is a sectional view of FIG. 1. 1.2...Glass substrate on which electrodes are formed, 6...
...Sealing material, 4...Glass fiber spacer, 5...
...Plastic bead spacer, Figure 1 Figure 2

Claims (2)

[Claims] (1) A liquid crystal display made by arranging a pair of substrate surfaces on which electrodes are formed to face each other, arranging a spacer between the substrates to form a predetermined gap, holding the substrate with a peripheral sealing material, and sealing the liquid crystal in the gap. 1. A liquid crystal display element, wherein the spacer is a mixture of a finely cut fibrous rigid spacer and a particulate elastic spacer. (2) The liquid crystal display element according to claim 1, wherein the center diameter of the fibrous rigid spacer in the liquid crystal is smaller than the center diameter of the particulate elastic spacer.