JPH02130520A - Manufacture of liquid crystal display element - Google Patents

Abstract

PURPOSE:To eliminate a waste of liquid crystal and to prevent liquid crystal contamination by charging liquid crystal in a space on one side which is sectioned by one continuous seal pattern composed of a wall seal pattern and cell seal patterns through an injection part of a large cell. CONSTITUTION:A large cell 5 is formed by joining a couple of large-sized electrode substrates 5 and 7 where transparent electrodes corresponding to several cells are formed by using a sealing agent, and the one continuous pattern consisting of cell seal patterns 8 and arranged laterally in array and the wall seal pattern 9 which extends to the corner parts of the electrode substrates 6 and 7 by connecting the respective cell seal patterns 8 is interposed between both electrode substrates 6 and 7. The injection part 10 communicates with the inside parts of all the cell seal patterns 8 interposed between both electrode substrates 6 and 7 through liquid crystal injection openings 11 as the opening ends of the respective cell seal patterns 8 and the liquid crystal can be charged. Consequently, a waste of liquid crystal is eliminated and contaminated liquid crystal need not be cleaned.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a liquid crystal display element (hereinafter referred to as LCD), and particularly to an improvement in a method for injecting liquid crystal.

[Conventional technology]

The conventional method for injecting liquid crystal in the LCD manufacturing process is to fill each empty cell with liquid crystal using a vacuum injection method or the like through a liquid crystal injection port without a seal pattern. It was a target.

However, such a liquid crystal injection method requires changing the injection jig depending on the external shape of each cell, and the production efficiency is also low because the injection is performed individually.

On the other hand, the liquid crystal injection method disclosed in Japanese Patent Application Laid-Open No. 58-21231, as shown in FIG. On the top, there is a plurality of cell seal patterns 2 arranged in a matrix at a distance from each other, and a large seal that surrounds these plural cell seal patterns 2 and has an opening 4 exposed at one side end of the electrode substrate 1. After coating and forming the pattern 3, another electrode substrate (not shown) forming a pair is superimposed and bonded on the electrode substrate 1, and liquid crystal is injected from the opening 4 side of the large seal pattern 3. Seal pattern 2 for each cell
The interior of the device is filled with liquid crystal. Therefore, by cutting the electrode substrate and dividing each cell seal pattern 2 after liquid crystal injection, it is possible to obtain a large number of cells filled with liquid crystal, which improves production efficiency compared to the individual injection described above. This has the advantage that injection jigs can be standardized.

[Problem to be solved by the invention]

However, in the above-mentioned conventional proposal of interspersing a plurality of cell seal patterns 2 inside a large seal pattern 3, the liquid crystal is also filled outside the cell seal pattern 2, so expensive liquid crystal is wasted. Moreover, a new process had to be added to clean the liquid crystal contamination on the outside of the cell.

The present invention was made in view of the above circumstances, and its purpose is to provide an LCD in which liquid crystal can be injected into multiple cell seal patterns at once, and there is no need to worry about liquid crystal wastage or liquid crystal contamination. The purpose of this invention is to provide a method for manufacturing the same.

[Means to solve the problem]

In order to achieve the above object, the present invention connects a plurality of cell seal patterns corresponding to individual cells and each cell seal pattern between opposing electrode substrates, and connects each cell seal pattern to a corner of the electrode substrate. After forming a large cell with a series of seal patterns interposed therein, the large cell is surrounded by the wall seal pattern and is surrounded by the wall seal pattern, and a plurality of cell seals are formed on one side of the large cell. Filling the inside of each cell seal pattern with liquid crystal through the injection part, which is a space communicating with each liquid crystal injection port of the pattern,
This large cell was then cut to obtain individual cells with the wall seal pattern removed.

[Effect]

According to the above means, in a space on one side divided by a series of seal patterns, that is, in a space surrounded by a wall seal pattern and a plurality of cell seal patterns and extending to one side end of a large cell, Since the liquid crystal can be filled through the injection part, it is no longer necessary to fill the area around each cell seal pattern, and waste of liquid crystal can be avoided.
Further, there is no need to add an additional process for cleaning liquid crystal contamination.

〔Example〕

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

1 to 3 relate to one embodiment of the present invention, in which FIG. 1 is a plan view of a large cell before liquid crystal injection, and FIG.
A sectional view taken along the line A and FIG. 3 are explanatory diagrams showing the step of injecting liquid crystal into this large cell.

In FIGS. 1 and 2, the large cell 5 is formed by bonding a pair of large electrode substrates 6 and 7 on which transparent electrodes for a plurality of cells are formed with a sealant, and between the picture electrode substrates 6 and 7. , there is a continuous seal pattern consisting of a plurality of cell seal patterns 8 arranged in a horizontal row and a wall seal pattern 9 that connects each cell seal pattern 8 to the corner of the electrode substrate 6.7. is without intervention. Here, the wall seal pattern 9 has a narrow portion 9a connecting each cell seal pattern 8, and a wide portion 9b located at the corner of the electrode substrates 6 and 7.
A space surrounded by this wall seal pattern 9 and exposed at one side end of the large cell 5 is an injection part 10. In other words, this injection part 10 communicates with the inside of all the cell seal patterns 8 interposed between the picture electrode substrates 6 and 7 through the liquid crystal injection port 11 which is the open end of each cell seal pattern 8. There is.

When injecting liquid crystal into the large cell 5 configured as described above, as shown in FIG.
3, and the liquid crystal 13 is injected into the injection part 10 by a vacuum injection method or the like, thereby filling the inside of each cell seal pattern 8 and the injection part 10 with the liquid crystal 13. After the liquid crystal is injected, the large cell 5 is cut along the cutting line 14 shown by the chain line in FIG.
Individual cells are obtained by cutting out the wall seal pattern 9. The liquid crystal cell obtained in this manner is not contaminated with liquid crystal on the outside, and thus becomes a completed product by sealing the liquid crystal injection port 11.

In this way, in the above embodiment, the injection part 10 is placed in the space on one side separated by the continuous seal pattern consisting of the cell seal pattern 8 and the wall seal pattern 9.
The liquid crystal 13 can be filled through the cell seal pattern 8, and there is no risk of the liquid crystal 13 going around into the space on the other side where it is not necessary. Since the outside is not contaminated with liquid crystal, a cleaning step can be omitted.

In addition, since the wall seal pattern 9 is provided with wide portions 9b located at the corners of the electrode substrates 6 and 7, air bubbles are prevented from entering when liquid crystal is injected.

Note that it is also possible to omit the wide part 9b as the wall seal pattern 9 and apply the narrow part 9a in close contact with the negative edge of the electrode substrate 6 (or 7). Since it is expected that the sealant will protrude during bonding as described in 6.7, when injecting liquid crystal using a pressure difference as described in JP-A-58-46322, for example, it is not possible to ensure airtightness of the injection surface. I don't like it.

〔Effect of the invention〕

As explained above, the present invention fills a space on one side separated by a continuous seal pattern consisting of a wall seal pattern and a plurality of cell seal patterns with liquid crystal through an injection part of a large cell, Since the injected liquid crystal is prevented from going around the outside of each cell seal pattern, it is possible to eliminate liquid crystal waste and eliminate the process of cleaning liquid crystal contamination.As a result, production efficiency is improved. It is possible to provide a method for manufacturing an LCD that is high and can significantly reduce manufacturing costs.

[Brief explanation of the drawing]

1 to 3 relate to one embodiment of the present invention, in which FIG. 1 is a plan view of a large cell before liquid crystal injection, and FIG.
A sectional view taken along the line A, FIG. 3 is an explanatory diagram showing the step of injecting liquid crystal into the large cell, and FIG. 4 is an explanatory diagram showing a conventional proposal. 5... Large cell, 6.7... Electrode substrate,
8... Seal pattern for cells, 9...
Wall seal pattern, 10... Injection part, 11.
...Liquid crystal inlet, 13...Liquid crystal. Figure 1 8: Cell seal pattern IO! Eiri Hp H: Seisho Mini Entrance Diagram 2

Claims (1)

[Claims] A continuous seal consisting of a plurality of cell seal patterns corresponding to individual cells and a wall seal pattern that connects each cell seal pattern to the corner of the electrode substrate between opposing electrode substrates. After a large cell with a pattern interposed therebetween is formed, a space is exposed at one side end of the large cell, surrounded by the wall seal pattern, and communicates with each liquid crystal injection port of the plurality of cell seal patterns. A liquid crystal display element characterized in that the inside of each cell seal pattern is filled with liquid crystal through an injection part, and then the large cell is cut to obtain individual cells from which the wall seal pattern is removed. manufacturing method.