JPS61201218A - Rubbing method for oriented film in liquid crystal display cell - Google Patents

Abstract

PURPOSE:To prevent the electric discharge at the edge of transparent electrodes arising from the static electricity generated between a glass substrate and a rubbing roller by adhering conductive tapes to plural pieces of the transparent electrodes formed on the glass substrates so that all the transparent electrodes are maintained at the same potential. CONSTITUTION:Plural pieces of the transparent electrodes 2 disposed to face each other above and below are juxtaposed onto the surface of the glass substrate 1 and an oriented film 3 is formed atop the electrodes 2. The conductive adhesive tapes 5 are adhered respectively to the electrodes 2 and thereafter both tapes 5 are connected by another conductive tape 5' to short-circuit all the transparent electrodes 2 formed on the substrate 1. The rubbing roller 4 is moved so as to contact under pressure with the surface of the substrate 1 by which the film 3 on the substrate 1 is rubbed. All the electrodes 2 are maintained at the same potential by the tapes 5, 5' during this time and even if the static electricity is generated between the substrate 1 and the roller 4, the electric discharge at the edge 2a of the electrodes 2 is prevented and the breakdown of the film 3 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of rubbing an alignment film in a liquid crystal display cell.

[Prior art] As a method for moving an alignment film in a conventional liquid crystal display cell, as shown in FIG. Furthermore, an alignment film 3 is formed on the upper surface of the transparent electrode 2. Then, the rubbing roller 4 is moved so as to come into pressure contact with the surface of the glass substrate 1 to rub the alignment film 3 on the glass substrate 1, thereby aligning the liquid crystal material.

[Problems to be Solved by the Invention] In the conventional rubbing method, static electricity is generated between the glass substrate 1 and the rubbing roller 4 because the rubbing roller 4 moves on the glass substrate 1 while pressing against it. Since static electricity is discharged at the edge portion 2a of the transparent electrode 2, the alignment film 3 on the edge portion 2a of the transparent electrode 2 may be destroyed, resulting in poor alignment.

The present invention attempts to solve these conventional problems.

[Means for Solving the Problems] As a means for solving the problems described above, the present invention includes bonding a conductive tape to a plurality of transparent electrodes formed on a glass substrate and short-circuiting the transparent electrodes. The gist of this invention is a method of rubbing an alignment film provided on the transparent electrode.

[Function] The above structure prevents the discharge at the edge of the transparent electrode caused by static electricity generated between the glass substrate and the rubbing layer, and destroys the alignment film. can be prevented.

[Example] Hereinafter, the present invention will be described in detail using an example shown in the drawings. In order to understand the present invention, parts that are the same as those of the conventional example are given the same reference numerals. 1 is a glass substrate that serves as the base of the liquid crystal display cell, and the surface of the glass substrate 1 has upper and lower parts. A plurality of transparent electrodes 2 are arranged in parallel to face each other, and an alignment film 3 is further formed on the upper surface of the transparent electrodes 2. After adhering conductive tapes 5 to each of the transparent electrodes 2 facing downward, both conductive M tapes 5 are connected with another conductive tape 5', and the glass substrate 1 All the transparent electrodes 2 formed in the above are short-circuited. Next, the rubbing roller 4 is pressed against the surface of the glass substrate 10 and the alignment film 3 on the glass substrate 1 is rubbed. At this time, the transparent electrodes 2 are all at the same level due to the conductive tapes 5 and 5', and even if static electricity is generated between the glass substrate 1 and the rubbing roller 4, the transparent electrodes 2
The alignment film 3
can prevent destruction.

[Effects of the Invention] As explained below, according to the alignment film rubbing method according to the present invention, a conductive tape is adhered to a plurality of transparent electrodes formed on a glass substrate, and all the transparent electrodes are bonded. Since they are set at the same potential, it is possible to prevent discharge at the edges of the transparent electrode caused by static electricity generated between the glass substrate and the rubbing roller, and the alignment film is not destroyed, resulting in alignment without defective alignment. membrane can be obtained.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing how to rub an alignment film applied to a liquid crystal display cell according to the present invention, and FIG.
-] is a perspective view showing the rubbing procedure of the alignment film. 1...Glass substrate 2...Transparent electrode 2a...
・Edge part 3... Orientation 1194... Rubbing roller 5.5'... Conductive tape

Claims (1)

[Claims] An alignment film in a liquid crystal display cell characterized by bonding a conductive tape to a plurality of transparent electrodes formed on a glass substrate, short-circuiting the transparent electrodes, and rubbing the alignment film provided on the transparent electrodes. Rubbing method.