JPS61198218A - Production of liquid crystal display element - Google Patents

Abstract

PURPOSE:To prevent the damage of an oriented film by the discharge of static electricity and the burn of finely patterned electrodes by using a fabric woven of high polymer fibers having electrical conductivity to an orientation treatment stage by rubbing orienting film on a glass substrate to orient liquid crystal molecules in a specified direction. CONSTITUTION:A rotating body 2 is rotated in a rubbing device and when the orienting film 8 on the glass substrate 7 is rubbed by the fabric 3, the fabric 3 is grounded via a conductive adhesive agent 4, the rotating body 2 and a fulcrum shaft 1 and therefore static electricity is hardly generated. The damage of the orienting film by the discharge of static electricity or the burn or the like of the finely patterned display electrodes is surely prevented. The attraction of ambient dust, etc. by static electricity is obviated and the production process is effective as a remedy to prevent the trouble with dust in the production of a liquid crystal display element.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a liquid crystal display element.

One trick: In the process of manufacturing liquid crystal display elements, it is necessary to align liquid crystal molecules in a certain direction. A common industrial method for orienting liquid crystal molecules is to apply a dipping method, spin coding method, printing method, etc. to the surface of a glass substrate using an organic polymer film such as polyvinyl alcohol or polyimide film, or alkoxy silica cloth, etc. A rubbing method has been used. There are many materials used for this cloth, such as wood, rayon, nylon, vinylon, polyester, wool, acrylic, polyvinyl chloride, polyvinylidene chloride, etc. Can be mentioned. However, in the rubbing method, static electricity is often charged depending on the combination of the material of the cloth used for alignment and the material of the alignment film. Therefore, when rubbing is performed, this static electricity is discharged and the alignment film of the liquid crystal display element is damaged. There was a problem that the fine pattern of display electrodes made of indium oxide (1, T, O) or the like could be damaged or burnt out.

In view of the above-mentioned problems, the present invention provides a method for manufacturing a liquid crystal display element that can prevent damage to the alignment film or burnout of finely patterned display electrodes due to electrostatic discharge during rubbing. That is.

Takashi Tou: The method for manufacturing a liquid crystal display element according to the present invention uses a cloth woven from conductive polymer fibers in the alignment treatment step of rubbing the alignment on a glass substrate to orient the liquid crystal molecules in a certain direction. This makes it difficult for static electricity to occur.

Hereinafter, the present invention will be described in detail with reference to an illustrated embodiment. FIG. 1 is a schematic diagram of a rubbing device used in the method of the present invention, in which 1 is supported by a support (not shown) and is grounded to the ground. 2 is a metal rotating body fitted onto the supporting shaft 1; 3 is a conductive high-metallic material attached to the circumferential surface of the rotating body 2 via a conductive adhesive 4; It is a cloth woven from molecular fibers. Examples of the conductive polymer fiber include nylon and vinylon as shown in FIG.

Polyester 1. Composite polymer fibers made by embedding electrically conductive carbon fibers 6 in the center of common synthetic fibers 5 such as acrylic, polyvinyl chloride, and polyvinylidene chloride, and the above-mentioned common synthetic fibers. Silver, copper,
Composite polymer fibers are made by adding fine powder of a conductive substance such as carbon as a filler to make the whole conductive, and conductive fibers such as polyacetylene, polythiazyl, and polyselenized benzene are added to the general synthetic fibers mentioned above. Examples include composite polymer fibers made by adding a conductive polymer material and spinning the fibers to make the entire material conductive.

Therefore, when the rubbing device described above rotates the rotating body 2 as shown in FIG. 1 and rubs the alignment film 8 on the glass substrate 7 with the cloth 3, the cloth 3 rubs the conductive adhesive 4
1 rotating body 2. Since it is grounded via the support shaft 1, static electricity is less likely to occur.

As a result, the alignment film may be damaged or
□ reliably prevents burnout of finely patterned display electrodes. Further, it does not attract surrounding dust or the like due to static electricity, and is effective as a countermeasure against dust defects in manufacturing liquid crystal display elements.

As described above, the method for manufacturing a liquid crystal display element according to the present invention includes:
This method has important practical advantages in that it can reliably prevent damage to the alignment film or burnout of finely patterned display electrodes due to discharge of static electricity during rubbing, and is effective in preventing dust defects.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view of a rubbing device used in an embodiment of the method for manufacturing a liquid crystal display element according to the present invention, and FIG. 2 is a sectional view of a polymer fiber that is the material of cloth 3. In FIG. 1...Spindle, 2...Rotating body, 3...Cloth, 4
... Conductive adhesive, 5... Synthetic fiber, 6...
- Carbon fiber, 7...Glass substrate, 8...Alignment film.

Claims (1)

[Claims] A method for manufacturing a liquid crystal display element, in which a cloth woven from conductive polymer fibers is used in an alignment treatment step of rubbing an alignment film on a glass substrate to align liquid crystal molecules in a certain direction.