JPS58139126A - Production of liquid crystal cell - Google Patents

Abstract

PURPOSE:To prevent the deviation in the relative positions of upper and lower glass substrates and to make the quality of liquid crystal high and reduce costs thereof, by providing quick drying adhesive agents and barriers for preventing the flow thereof in addition to sealing materials to the upper and lower glass substrates in the stage of superposing said substrates. CONSTITUTION:Patterns 24, 25 of upper and lower display electrodes are formed on upper, lower substrates 21, 22 so as to face each other, and sealing members 23 are formed on one of the glass substrates. Quick drying adhesive agents 26 for adhering the glass substrates and barriers 27 for prevebting the flow thereof are beforehand formed by using the materials of the sealing members 23, and the substrates 21, 22 are adhered so as to face each other. Since the substrates 21, 22 are tentatively stuck by the agents 26, the stripping of the substrates and the deviation in the relative positions thereof are obviated even in the next stage such as heating. The flow of the agents 26 toward the display parts, etc. of liquid crystal cells is prevented by the barriers 27.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a liquid crystal cell. More specifically, the present invention relates to a stacking method for integrally forming a plurality of liquid crystal cells by stacking upper and lower glass substrates as a common substrate.

In the manufacture of liquid crystal cells, conventional methods have been used to construct liquid crystal cells, or to integrally form a plurality of liquid crystal cells using a lower glass substrate as a common substrate and a seal portion as an adhesive.

The thickness of the upper and lower glass substrates required for a liquid crystal cell is generally 0.3 to 1 mm, respectively, and the material is soda glass. etc. have been used. Glass substrates, which are used as common substrates in this way, are large in size, so they generally have large warpage, and it is difficult to make the material thickness from the beginning to 0.55 mm or less.
．． Those with a thickness of 5 mm or less have been manufactured by polishing. Also, the size of glass that can be used under these conditions is 1
(LOmm squared.) For this reason, the manufacturing cost of liquid crystal cells was high.

FIG. 1 shows a conventional example, and is a side view of a case where a plurality of liquid crystal cells are integrally formed using polished glass as the upper and lower glass substrates.

In this conventional example, the sealing member 3 is used as an adhesive to stack the lower glass substrates 1 and 2, and the sealing member 6 is cured by heating and baking, thereby fixing the outer periphery of the upper and lower glass substrates to each other. When the upper and lower glass substrates 1.
20 intervals and relative positions are configured to be determined. Regarding the spacing and relative position between both glass substrates 1.2, the conditions are that the upper and lower glass substrates 1.2 are made of polished glass, and that the size is less than about 1 OOmm square. In the process from when both substrates 1.2 are stacked to when the sealing member 6 is hardened, the adhesive force of the sealing member 6 alone prevents the movement of each substrate due to its own weight, and the two substrates are bonded together. They can be kept in a fixed position relative to each other. However, when a large glass of approximately 300 mm square size is used as the lower glass substrate, a seal is formed, and the upper and lower glass substrates are stacked to form multiple liquid crystal cells, warping of the glass substrate may occur. , the phenomenon shown in FIGS. 2 and 3 will occur.

Fig. 2 shows a side view of a case where glasses with a square size of 300 mm are used as the upper and lower glass substrates and are stacked together, and Fig. 3 shows the upper and lower glass substrates formed on the upper and lower glass substrates shown in Fig. 2. , shows part of the lower display electrode pattern.

Note that the upper and lower glass substrates 11 and 12 are heated and fired using the sealing member 13 as an adhesive to increase adhesive strength and adhesive speed. However, the adhesive force is weak before heating and baking, and therefore, the upper and lower glass substrates 11 and 12 may partially peel off before the sealing member 16 is cured.
As shown in FIG. 3, the relative positions of the upper and lower glass substrates 11 and 12 are shifted, significantly impairing the relative positional accuracy of the display electrode patterns 14 and 15 formed on the lower glass substrate and facing each other. It makes it bad.

The object of the present invention is to use a quick-drying adhesive in addition to the sealing member when overlapping the upper and lower glass substrates.
The object of the present invention is to prevent the above-mentioned relative displacement of the upper and lower glass substrates and provide a high-quality liquid crystal cell at low cost. Embodiments will be illustrated and described below.

4 and 5 show a plurality of liquid crystal cells integrally formed using the present invention using upper and lower glass substrates as a common substrate, FIG. 4 is a plan view, and FIG. 5 is a plan view. FIG. 4 is a sectional view of FIG. 4; Upper and lower display electrode patterns 24 and 25 are formed on the F1 lower glass substrate 21 and 22 to face each other. After removing the seal member 26, a seal member 26 is formed on one of the lower glass substrates by printing or other means. At this time, a barrier 27 for preventing the flow of the quick-drying adhesive 26 for bonding the -L1 lower glass substrates 21 and 22 is simultaneously formed using the material of the sealing member 26 in advance. A fast drying adhesive 26 is then applied within the barrier. Thereafter, the upper and lower glass substrates 21 and 22 are placed facing each other and bonded together. Therefore, the upper and lower glass substrates 21 and 22 bonded in the above process are temporarily fixed by the adhesive force of the quick-drying adhesive 26 even before the sealing member 23 is heated, fired, and hardened. , no peeling or relative displacement occurs, and the barrier 27 allows the quick-drying adhesive 2
It is also possible to prevent 6 from flowing out toward the display section of the liquid crystal cell, etc., and it becomes possible to form the liquid crystal cell efficiently and with a high yield.

In this embodiment, a barrier 27 for preventing adhesive flow is formed on the glass substrate side on which the seal member 26 is printed using the same material as the seal member 26, but a seal member 27 is formed on the side of the other glass substrate to be overlapped. The same material as 23 forms the barrier 27, into which a quick-drying adhesive may be applied. Further, a material other than the material of the sealing member 23 may be used as the barrier 27.

As described above, the present invention uses a quick-drying adhesive in addition to the sealing member when overlapping the upper and lower glass substrates, and further provides a flow-preventing barrier near the location where the quick-drying adhesive is applied. Even if the size of the common glass substrate used to form multiple liquid crystal cells is increased, the relative positional shift of the upper and lower glass substrates is prevented, resulting in the realization of high-quality, low-cost liquid crystal cells. has.

[Brief explanation of the drawing]

1 and 2 are side views showing a liquid crystal cell formed by a conventional liquid crystal cell manufacturing method, and FIG. 3 is a plan view schematically showing the display electrode pattern in FIG. 2. FIGS. 4 and 5 are a plan view and a cross-sectional view, respectively, showing a liquid crystal cell formed according to an embodiment of the present invention. 1.11.21...Top glass substrate, 2.12.2
2...Lower glass substrate, 3.16.26...
-Sealing member, 26...quick-drying adhesive, 27...barrier. Figure 3

Claims (1)

[Claims] A method for manufacturing a liquid crystal cell, in which upper and lower glass substrates constituting a liquid crystal cell are created as a common substrate, the two substrates are stacked to integrally form a plurality of liquid crystal cells, and then the liquid crystal cells are divided into individual liquid crystal cells. and when the two substrates are stacked, a quick-drying adhesive is applied to at least one of the upper and lower glass substrates separately from the sealing member that constitutes the liquid crystal cell, and the two substrates are stacked. In the method for manufacturing a liquid crystal cell,
A method for manufacturing a liquid crystal cell, characterized in that a barrier for preventing the quick-drying adhesive from flowing is provided near a location where the quick-drying adhesive is applied.