JPS6173926A - Production of film type liquid crystal display element - Google Patents

Abstract

PURPOSE:To prevent the generation of detective sealing by masking the seal adhering part of a film substrate in the stage of spraying a spacer for adjusting the space between the substrates. CONSTITUTION:A mask cover 6 of the same size as the size of a seal pattern or the size slightly larger than said size is provided. The cover 6 is placed on the surface of the film substrate 7 to cover the seal adhering part and to prevent the spacer from being sprayed to the seal adhering part in the stage of spraying the spacer. The generation of the defective sealing is thus prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a method for manufacturing a film-type liquid crystal display element having a spacer for adjusting a gap between substrates inside a cell.

<Prior Art> Glass is generally used for the substrate of a liquid crystal display element, and glass fiber is used for the spacer.

Since the glass substrate cell is hard glass, it is relatively easy to set the cell thickness to be uniform.
About 30 pieces/- to 30 pieces/- is enough, and for small cells,
In some cases, spraying may not be necessary.

On the other hand, if the substrate is a thin and flexible material such as a plastic film, at least 50 spacers/- or more need to be uniformly distributed in order to obtain a more uniform cell thickness. . In addition, as a spacer material, spherical plastic beads are better than glass fibers in terms of preventing scratches on the alignment surface, so spherical plastic beads are generally used in film-type liquid crystal display elements. There is. These glass beads are made of acrylic, nylon, etc.
All of them tend to accumulate static electricity and the beads tend to stick together, making it difficult to disperse and spread them uniformly.Also, since the amount of scattering is larger than that of glass fiber, if the beads are present at the W part where the seal contacts Seal failure occurs.

The mechanism by which seal failure occurs will be explained below.

Generally, a liquid crystal display element is manufactured by printing and coating a seal pattern on one of two substrates and scattering spacers on the other substrate.
It is manufactured by bonding together, but at this time, if there is a pool of spacers at the seal bonding part of the substrate on which spacers are spread, the gaps between the spacers will be sealed inside the seal, and air bubbles will be generated.

This situation is shown in Figure 2 (enlarged view of the seal pattern part. (1)
) indicates before bonding, (2) indicates after I/I bonding)
In Figure 0, 1 and 2 are film substrates, 3 is a seal, 4 is a spacer, and 5 is a bubble.

When a thermosetting material is used as a sealing material, bubbles expand when heated, resulting in poor sealing.

<Object of the Invention> The present invention has been made in view of the above-mentioned conventional problems, and it is an object of the present invention to provide a method for manufacturing a film-type liquid crystal display element in which the above-mentioned seal failure does not occur.

<Structure of the Invention> The method for manufacturing a film-type liquid crystal display element of the present invention is a method for manufacturing a film-type liquid crystal display element having spacers for adjusting a gap between the substrates inside the cell. (i.e. mask the seal adhesive part of the film substrate,
The method is characterized in that the above-mentioned spacers are dispersed.

<Example> As shown in Figure i1 rl), a mask cover 6 (for example, a plastic plate hollowed out in the shape of a frame) 6 of the same size or slightly larger than the seal pattern is provided, and when distributing spacers, the mask cover 6 is covered with a film. By placing it flat on the surface of the substrate 7 or by leaving it open several times, the seal adhesive part is covered, thereby preventing spacers from being scattered on the seal adhesive part, which has been a problem in the past. This prevents the occurrence of seal failures.

FIG. 1(2) is a plan view showing a state in which the mask cover 6 is placed on the substrate 7. As shown in FIG.

The technical idea of the present invention can also be effectively implemented in the production of glass substrate type liquid crystal display elements or hard plastic substrate type liquid crystal display elements having spacers for adjusting the substrate gap inside the cells. .

<Effects of the Invention> As explained in detail above, according to the present invention, seal defects that conventionally occur can be prevented, and a seal with excellent shape and reliability can be obtained, which is extremely useful. A method for manufacturing a liquid crystal display element can be provided.

[Brief explanation of the drawing]

Figure 1 (1) is a perspective view, Figure 1 (2) fi plan view,
Figures (1) and (2) are cross-sectional views. Explanation of symbols 1.2: Film substrate, 3: Seal, 4 Varnish spacer, 5: Air bubble, 6: Mask cover, 7: Film substrate. Agent: Patent attorney Aihiko Fuku (and 2 others)
darkness

Claims (1)

[Claims] 1. A method for manufacturing a film-type liquid crystal display element having a spacer for adjusting the gap between the substrates inside the cell, which is characterized in that the seal adhesive part of the film substrate is masked when the spacer is distributed. Method of manufacturing elements.