JP2534741B2 - Method for manufacturing LCD cell - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for manufacturing an LCD cell, and more particularly, when the upper and lower glass substrate base materials are bonded together by heating and pressing through a sealing material. In addition, it is characterized in that the seal pattern can be prevented from bursting, and the yield of multiple production is good.

[Conventional technology]

3 to 5 are explanatory views of a conventional example, FIG. 3 is a sectional view of a cell, FIG. 4 is a plan view of a glass substrate base material on which a seal pattern is formed, before heating and pressurizing, and FIG. Similarly, it is a plan view after heating and pressurization.

In FIG. 3, 1 is an upper glass substrate, 2 is a lower glass substrate, and both glass substrates 1 and 2 are bonded together via a sealing material 3 made of a thermosetting resin such as epoxy resin to form a cell 4. Liquid crystal 5 is filled in.

By the way, in the conventional cell manufacturing method, as shown in FIG. 4, for example, a seal pattern 6 is continuously formed on one surface of the upper glass substrate base material 1A, and a large number of one base material 1A can be formed. Since individual picking is possible, the distance between the opening 6a _{1 of the} portion corresponding to the inlet of the right seal pattern 6a and the right side 7 of the left seal pattern 6b is as close as possible to the print formation. Such a glass substrate base material 1A was overlaid with a glass substrate base material on the lower surface (not shown), heated and pressed to form a large number of cell groups 4 ... And then cut into individual cells 4.

[Problems to be solved by the invention]

However, in the conventional cell manufacturing method, as shown in FIG. 5, the opening 6a ₁ forming the inlet of the right seal pattern 6a is close to the side 7 of the left seal pattern 6b. Therefore, when the lower glass substrate base material is overlaid on the upper glass substrate base material 1A and heated and pressed, the opening portion 6a ₁ forming the injection port is crushed and comes into contact with the side portion 7 of the left seal pattern 6b, Therefore, the seal pattern 6a
The inside of the cell 4 surrounded by is sealed, the air in the cell 4 thermally expands, and the seal pattern 6a bursts.
It has a drawback that it is no longer useful as a D cell and the yield of multiple cells is poor. The above problem does not occur if a sufficient distance is maintained so that the gaps between the seal patterns 6 that are continuously formed do not come into contact with each other when they are crushed by heat and pressure. The number of seal patterns 6 that can be formed on the cell 4 decreases, and the productivity of the cells 4 decreases.

The present invention is intended to solve the above-mentioned conventional drawbacks, and an object of the present invention is to bond two upper and lower glass substrate base materials by heating and pressurizing them through a sealing material. It is an object of the present invention to provide a method for manufacturing an LCD cell, in which the seal pattern does not burst and the yield of a large number of cells and the productivity are high.

[Means for solving problems]

The present invention, in order to achieve the above object, at least one of a pair of upper and lower glass substrate base material is continuously formed with a sealing material made of a thermosetting resin, separated from each other,
The shape of a large number of seal patterns having an opening that becomes a liquid crystal injection port by projecting a substantially rectangular pattern outward from one side is applied to the outer edge of one side of the seal pattern that faces the opening of another adjacent seal pattern. Each has a shape having a recess.

[Action]

When a pair of upper and lower glass substrate base materials are heated under pressure through the seal material, the seal pattern is slightly crushed and the tip of the opening portion slightly extends outward, but faces the opening portion of another adjacent seal pattern. Since the concave portion is formed at the outer edge of one side, the sealing material at the tip of the opening portion penetrates into the concave portion but is not adjacent to the other seal pattern adjacent thereto, and the opening portion is not blocked. Even if the air inside the seal pattern is thermally expanded, it is released into the outside air from the opening, and the seal pattern is not ruptured by the air inside.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a plan view of the glass substrate preform before heating and pressing, and FIG. 2 is a plan view showing the same after heating and pressing. Incidentally, the same parts as those of the conventional example shown in FIGS. 3 to 5 are designated by the same reference numerals, and the duplicated description will be omitted.

The difference between the present invention and the conventional example is that, as shown in FIG. 1, when the seal patterns 6a and 6b are continuously formed on the glass substrate mother body 1A, the opening portion forming the injection port of the right seal pattern 6a is formed. the recesses 8 provided on the right side portion 7 of the left next to the seal pattern 6b facing 6a _1, lies in that partially Katsuhito.

According to the above-described embodiment of the present invention, as described above, the recessed portion 8 is provided on the right side of the seal pattern 6b on the left side so that the upper glass substrate base material 1A and the lower glass substrate base material are superposed and heated. Seal pattern 6a on the right side when pressurized
Although the opening portion 6a ₁ which constitutes the injection hole of ‘ _1’ is crushed, it does not contact the right side portion 7 of the adjacent seal pattern 6b, and the gap 9 exists, so that the cell 4 embedded in the right seal pattern 6a is filled. Since the heated air escapes from the gap 9, the seal pattern 6a will not be accidentally ruptured. Therefore, the yield of multi-cavity production is improved.

〔The invention's effect〕

According to the present invention, as described above, when the glass substrate base material is pressurized and heated through the seal material, the seal pattern is slightly crushed and the opening tip slightly extended outward is provided with the other seal pattern. The inside of the seal pattern that thermally expands due to heating because it enters the recess of the outer edge of one side facing the outer opening but does not contact the other adjacent seal pattern and does not close the opening. Since this air is released into the outside air from the opening, it is possible to prevent the seal pattern from bursting from the thermally expanded air inside.

[Brief description of drawings]

1 and 2 are explanatory views of an embodiment of the present invention. FIG. 1 shows heating of a glass substrate base material on which a seal pattern is formed,
FIG. 3 is a plan view showing a state before heating and pressing, FIG. 3 to FIG. 5 are explanatory views of a conventional example, FIG. 3 is a sectional view of a cell, and FIG. FIG. 4 is a plan view of the glass substrate preform on which the seal pattern is formed, before heating and pressurization, and FIG. 5 is a plan view of the same after heating and pressurization. 1 ... upper glass substrate, 1A ... glass substrate base material, 2 ...
Lower glass substrate, 3 ... Sealing material, 4 ... Cell, 5 ...
Liquid crystal, 6a, 6b …… Seal pattern, 6a ₁ …… Aperture, 7 ...
… Side part, 8 …… Concave part, 9 …… Gap.

Claims (1)

(57) [Claims] 1. A plurality of seal patterns, which are separated from each other and have an opening projecting outward from one side of a substantially rectangular pattern and serving as a liquid crystal injection port, are formed on at least one of a pair of upper and lower glass substrate base materials by thermosetting. LCD cells that are continuously formed with a sealing material made of resin, and the pair of glass substrate base materials are pressed and heated through the sealing material to bond them together, and then divided into individual cells by cutting. In the manufacturing method of (1), the shape of the plurality of seal patterns is a shape having a recess at each outer edge of one side of the seal pattern facing the opening of the other adjacent seal pattern. LCD cell manufacturing method.