JPH03228015A - Production of liquid crystal cell - Google Patents

Abstract

PURPOSE:To facilitate in adequate dispersion of spacers and uniform gap control by spraying the spacers after the application of oriented films and before the baking stage thereof. CONSTITUTION:Transparent electrodes 2 are formed on a pair of transparent substrates (glass or plastic) 1 and the liquid crystal oriented films 3 are formed thereon. The spacers 5 are then sprayed on the oriented film 3 of the one substrate 1. The baking and drying of the two substrates 1 are executed after the spacer spraying process and a sealing agent 4 is applied on the substrate 1 without sprayed with the spacers. The two substrates 1 are thereafter disposed to face each other and are stuck to each other to form an empty cell. A liquid crystal 6 is injected into this empty cell and the cell is sealed. The spacers 5 are brought into tight contact with the oriented films 3 by the solvent of the oriented films 3 when the spacers 5 are sprayed right after the application of the oriented films 3 in such a manner. There is no movement of the spacers 5 even during the subsequent production process and after the completion of the product. The uniform gap control is thus executed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a liquid crystal cell used in a display device.

(Conventional technology) FIG. 2 shows an example of a method for manufacturing a liquid crystal cell.

First, a transparent electrode 2 is formed on a pair of transparent substrates (glass or plastic) 1 (step a), a liquid crystal alignment film 3 is formed thereon (step b>), and baked (step C).Next, The encapsulant 4 is printed on one side (step d), and the spacer 5 is sprayed on the other side (step e).After this, both are placed facing each other and bonded together to form an empty cell (step f). Liquid crystal 6 is injected into this empty cell and sealed (step q).

The above manufacturing method is used to manufacture a vertical alignment type liquid crystal cell without performing a rubbing process.

[Problem to be solved by the invention]

However, in such a manufacturing method, since the spacers 5 are dispersed after the alignment film 3 is fired, the surface of the alignment film 3 has no adhesive property, and the spacers 5 easily move or separate from the surface of the alignment film. , the dispersion state and density of the spacers 5 may become significantly non-uniform.

An object of the present invention is to provide a method for manufacturing a liquid crystal cell in which spacers can be appropriately dispersed and uniform gap control can be expected.

[Means to solve the problem]

In the present invention, a transparent electrode is formed on a pair of transparent substrates, an alignment film is applied thereto, the inner substrates are placed facing each other, and the inner substrates are bonded together using a sealant while controlling the gap using a spacer to create an empty cell. A method for manufacturing a liquid crystal cell in which liquid crystal is injected into the cell and sealed, is characterized by spraying spacers after applying an alignment film and before a firing process.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1 shows an embodiment of the present invention.

First, a transparent electrode 2 is formed on a pair of transparent substrates (glass or plastic) 1 (step A), and a liquid crystal alignment film 3 is formed thereon (step B).

Next, spacers 5 are sprinkled on the alignment film 3 of one substrate 1 (step C). After the spacer spraying step, the inner substrate 1 is baked and dried (step D), and then the sealant 4 is applied to the substrate 1 without spacer spraying (step E).

Thereafter, the inner substrates 1 are faced and bonded together to form an empty cell (step F), and liquid crystal 6 is injected into the empty cell to seal it (step G).

When the spacers 5 are sprayed immediately after the application of the alignment film 3, the spacers 5 become aligned with the orientation WA3 due to the solvent of the orientation WA3.
3, the spacer 5 does not move during the subsequent manufacturing process and after finishing the product, and the gap is uniformly controlled.

〔Effect of the invention〕

As described above, according to the present invention, since the spacers are dispersed after the alignment film is applied and before the baking process, the spacers can be held on the alignment film in an appropriate dispersed state and density. Uniform cast control can be expected.

[Brief explanation of drawings]

FIG. 1 is a manufacturing process explanatory diagram showing one embodiment of the method for manufacturing a liquid crystal cell according to the present invention, and FIG. 2 is a manufacturing process explanatory diagram showing a conventional example. DESCRIPTION OF SYMBOLS 1... Transparent substrate, 2... Transparent electrode, 3... Alignment film, 4... Sealant, 5... Spacer, 6... Liquid crystal, 8... Electrode forming step, B ...Alignment film coating process, C
...Spacer dispersion process, D...Baking process, E...
・Sealant application process, F... Bonding process, G... Liquid crystal injection/sealing process.

Claims (1)

[Claims] After forming transparent electrodes on a pair of transparent substrates and applying an alignment film, the two substrates are placed facing each other and bonded together using a sealant while controlling the gap with a spacer to create an empty cell, and a liquid crystal is placed inside this empty cell. 1. A method for manufacturing a liquid crystal cell by injection and sealing, which comprises dispersing spacers after applying an alignment film and before a firing process.