JPS5914500A - Divider - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing an optical cell, particularly a liquid crystal cell.
More specifically, the present invention relates to a dividing device for extracting individual cells from multi-cells.

Generally, when creating a liquid crystal cell, a predetermined electrode pattern or seal spacer is formed in advance on a large glass plate so that many cells can be created at the same time, and then a counter electrode pattern is formed on this to form each cell. A multi-cell is created by overlapping it with another large-sized glass plate prepared in the same way. After dividing this multi-cell into individual cells, liquid crystal is injected from the predetermined injection port of the divided cell and sealed, or liquid crystal is injected into each cell of the multi-cell, sealed, and then the individual cells are injected and sealed. divided into

To divide the cells into individual cells, for example, cut grooves into the multi-cell along the cutting line using a diamond cutter or carbide tip (e.g. tungsten carbide), and then manually cut the grooves along the cutting line. A method of dividing into individual cells by folding is adopted.

However, if the manufacturing method of a liquid crystal cell using such a multi-cell method is applied directly to a twisted nematic liquid crystal mode cell (hereinafter referred to as a TN cell), a liquid crystal display device manufactured using individual cells taken out from a multi-cell However, some devices may not operate in twisted nematic liquid crystal mode. As a result of repeated research on this point, the present inventor found that when individual cells are removed from a multi-cell by cutting, the alignment-treated surface comes into contact with the inner surface of the other substrate, and when the liquid crystal is aligned, the liquid crystal in this contact area is It has been found that this is based on the fact that the orientation is no longer aligned in the determined orientation direction. This has problems with conventional cutting, for example, conventional dividing methods include the above-mentioned manual folding method, or the multi-cell splitting method with cut grooves 2 on a platform 1 made of blade rubber as shown in Figure 1. 6 was placed and the top thereof was pressed by a pressure roller 4 to divide the paper.

In other words, in this conventional dividing method, uneven forces are applied to the multicell during cutting, resulting in areas where the inner surfaces of the pair of substrates that make up the multicell come into contact with each other. . For this reason, there have been drawbacks such as TN cells having the above-mentioned liquid crystal alignment defects produced.

On the other hand, a method of tJJ cutting multicells using laser light has also been proposed, but although this method eliminates the generation of liquid crystal cells with alignment defects as described above, this method does not require a high energy source. This method is not a good method because it increases the manufacturing cost because of its use, there is a limit to the thickness of the substrate that can be cut, and the cutting speed is slow, causing a decrease in yield.

As described above, there is currently a demand for a good cell division method in a multi-cell system.

SUMMARY OF THE INVENTION An object of the present invention is to provide a multi-cell division method suitable for manufacturing optical cells, particularly TN cells, which eliminates the above-mentioned drawbacks.

After extensive research in accordance with the above-mentioned objective, the present inventor found that when dividing a member such as a multi-cell into individual members by cutting the member to be divided along the kerf, the member to be divided is cut into individual members. By using a dividing device having a means for clamping the plates and a curvature adjusting means for imparting curvature to the pair of plates, it is possible to divide the inner surface of the multi-cell substrate into individual cells in a non-contact state, and moreover, in a stepwise manner. The retainer can be made smaller and damage can also be prevented.

The present invention will be explained below with reference to the drawings. FIG. 2 is a sectional view of the dividing device of the present invention (those with the same symbols as in FIG. 1 are the same members).

The dividing device of the present invention clamps the multicell 6 having the kerf 2, and when the multicell 6 is curved, the section where the multicell 6 is cut along the kerf 2 is fixed by loosening the lock nut 6 and tightening the threaded rod. By adjusting the length of the pipe 7, the curvature of the plate 50 is adjusted, and the curvature of the length plate 5' is adjusted in the same way, i.e. by loosening the lock nut 6', the length of the threaded rod 7' is lengthened, and such a pipe is Rods 8 and 8' can press plates 5 and 5', respectively, into a curved state.

After bending the plates 5 and 5' in this way, when the air cylinder 9 is turned on and moved downward, the plate 5 moves together with the support 10, and the multi-cell 6 is connected to the plate 5. 5' to curve the multicell 6. At this time, the multicell 6 is cut along the kerf 2. Next, the air cylinder 9 is turned off and the plate 5 is separated from the multicell 5. After that, change the direction by an angle of 90° so that the multicell 6 is cut along one of the grooves, and repeat the same cutting process as described above to cut the substrate on one side of the multicell 6. Furthermore, by repeating the same method on the other side of the multi-cell 5, the multi-cell 6 can be divided into individual cells.

The multi-cell used in the device of the present invention is illustrated in FIG.
) and (b) K can be shown. In FIG. 6, the multi-cell 3 includes a plurality of cells 11, and grooves 2 and 2' for dividing into individual cells 11 are formed by a diamond cutter or a scribe with a carbide tip.

The kerfs 2 are formed horizontally, and the kerfs 2' are formed vertically. Further, similar grooves are formed on the back side of the multi-cell 6 in the horizontal direction and the vertical direction, respectively. However, when cutting the multi-cell 5, it is not necessary to have kerfs on both sides.

Further, the upper substrate 12 constituting this multi-cell 3 is subjected to alignment treatment in the alignment direction 13 over the entire inner surface of the upper substrate 12, and the inner surface of the crab substrate 14 &
An alignment treatment in alignment directions 15 that intersect at an angle of is performed over the entire surface.

The multi-cell 6 is formed by forming an electrode pattern (not shown) in the shape of an 80-character segment on one side of an upper substrate 12, for example, a 10th major glass plate, to form, for example, individual cells 11, and then forming an electrode pattern (not shown) in the shape of an 80-character segment on a lower substrate 14, for example, to form individual cells 11. A counter electrode pattern (not shown) is formed on one surface of the second large-sized glass plate to form individual cells 11, and then an alignment treatment, such as a rubbing treatment, is performed so that the respective alignment directions intersect at 90 degrees. Further, after forming the alignment film, it is rubbed to form an alignment treated surface, and then a frit glass or the like is formed on the side of the first large-sized glass plate having the electrode pattern to form a seal spacer for each cell 11. After applying an epoxy adhesive using a screen printing method, the second large-sized glass plate is overlaid so that the figure-eight segment electrode pattern and the counter electrode pattern are accurately opposed to each other, and then the epoxy adhesive The seal spacer 16 can be created by performing heat treatment according to the curing conditions of the adhesive.

In the apparatus of the present invention, an electro-optic material such as liquid crystal may be injected into each individual cell 11 of the multi-cell 6 and then cut into individual cells 11, or the individual cells 11 may be cut into individual cells 11. The electro-optic material may be injected after cutting.

Furthermore, in the apparatus of the present invention, suitable plastics can be used as the multi-cell 50 substrate in addition to the above-mentioned glass plate. Examples of plastics that can be used include acrylic resin, methacrylic resin, polyethylene terephthalate,
Examples include polyvinyl chloride, polyethylene, phenol resin, urethane resin, nylon, and polystyrene.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional dividing device. FIG. 2 is a sectional view of the dividing device of the present invention. FIG. 6 (sl) is a plan view of a multi-cell used in the present invention, and FIG. 6 (11) is a cross-sectional view taken along line A-A'. 2-... Placement piece if J'5・e... Multi-cell 5.5
'...Φ plate 6.6' @@@@@Lock nut 7.
7'・Fist・0 threaded rod 8,8′...Medium・Pipe 9...e・Air cylinder 10.10'---
...Support stand patent applicant Canon Co., Ltd. 5 Chizuka (θ) Motsukuni (b)

Claims (1)

[Claims] A dividing device characterized by having means for holding a member to be divided, which has a substrate having a cut groove on at least one surface, between a pair of plates, and a curvature adjusting means for imparting a curvature to the pair of plates. .