JPS61296330A - Manufacture of liquid crystal display element - Google Patents

Abstract

PURPOSE:To eliminate a defect in orientation due to static electricity during a rubbing treatment by short-circuiting display electrode patterns by common patterns provided on a flank of a substrate before the rubbing treatment. CONSTITUTION:The display electrode patterns 3 and 3' are short-circuited previously by the common electrodes 4 and 4' formed on the substrate flank and the common electrodes 4 and 4' are short-circuited by an electrode pattern 5, so that even if static electricity is generated, there is no discharge caused between the display electrodes because the electrodes are all held at the same potential. Namely, the electrodes are short-circuited previously and then there is no defect in orientation caused. Further, the common electrodes 4 and 4' are removed without any alteration in outward in shape after a liquid crystal display element is completed by polishing away the common electrodes on the substrate flank by the film thickness of a transparent conductive film or chamfering the peripheral part of the substrate flank until the conduction to the common electrodes 4 and 4' is not obtained, and the respective electrodes are independent and driven individually. Consequently, discharge is prevented from being caused by static electricity generated in the rubbing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a liquid crystal display element in which alignment treatment is performed by a rubbing method, and a manufacturing method for eliminating alignment defects caused by static electricity during the rubbing treatment. Regarding the method.

[Conventional technology]

Conventionally, especially in TN type liquid crystal display elements, alignment treatment has been performed on the substrate of the liquid crystal display element in order to align the liquid crystal molecules in a certain direction. A rubbing method is one method for the above-mentioned alignment treatment. As an example of this method, a dielectric film such as polyimide resin or polyamide resin is coated on a transparent conductive film that is a display electrode, and the surface is rubbed in a specific direction with a cotton cloth, a chemical fiber cloth such as polyester cloth, or the like. By performing such a treatment, the long sleeves of the liquid crystal molecules can be oriented parallel to the rubbing direction. However, in the above-mentioned rubbing treatment, static electricity is generated due to friction between the glass substrate and the cotton cloth or chemical fiber cloth. This static electricity causes discharge to occur in areas where the display electrodes are closely spaced, and a portion of the alignment film made of polyimide resin or the like is thermally destroyed and the alignment state is disturbed, resulting in poor alignment.

In addition, as a method to eliminate the above-mentioned drawbacks,
No. 044 is a method in which the display electrode patterns are short-circuited by a common pattern on the substrate surface before the alignment treatment, to prevent discharge caused by static electricity during rubbing, and the short-circuited portion is removed after rubbing.

[Problem that the invention seeks to solve]

However, as mentioned above, when short-circuiting the display electrode pattern on the substrate surface, it is necessary to cut a part of the substrate to remove the short-circuited part, which has the disadvantage that the effective display area of the substrate display surface becomes narrower. was there.

The present invention solves the above-mentioned drawbacks, and aims to prevent alignment defects due to static electricity during rubbing without reducing the effective display area relative to the external shape of the substrate.

[Means for solving problems]

In order to achieve the above object, the present invention has the following configuration. That is, in the present invention, the display electrode patterns are short-circuited with a common pattern provided on the side surface of the substrate before the rubbing process.

[Effect]

With the above configuration, before alignment treatment by rubbing method is performed, the display electrode pattern is short-circuited on the side surface of the substrate to prevent static electricity generated during rubbing, and after rubbing, the short-circuited portion on the side surface of the substrate is removed to prevent alignment defects. It can be prevented.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. 1st
The drawings show one embodiment of a liquid crystal display element according to the present invention, and FIG. 1 (al is a plan view, FIG. 1(b) is a side view, and FIG.
FIG. 3 is a perspective view showing a short-circuited portion in the figure, and FIG. 3 is a perspective view showing a state in which the short-circuited portion is removed.

In FIGS. 1 to 3, reference numeral 1.2 indicates a common electrode formed of a glass substrate, and reference numeral 5 indicates an electrode pattern for connecting the common electrode 4.4. Display electrode pattern 6.
By short-circuiting 6 with a common electrode pattern 5 formed on the side surface of the substrate, even if static electricity is generated due to the rubbing process, no discharge occurs between the display electrodes because the electrodes are all at the same potential. That is, in the past, discharge occurred particularly at the narrowest part 6 between the electrodes and disturbed the alignment, but if the electrodes are short-circuited in advance as in this embodiment, alignment defects will not occur. Furthermore, as in this example, after the liquid crystal display element is completed, the common electrode on the side surface of the substrate may be removed by polishing by the thickness of the transparent conductive film as shown in FIG.
As shown in bl, by chamfering the peripheral part of the substrate to the extent that there is no conduction between the electrode pattern 3.3' and the common electrode 4.4, the external dimensions can be removed (the common electrode 4.4 can be removed, Each electrode is independent and can be driven independently.

〔Effect of the invention〕

As is clear from the above explanation, the display electrode pattern is short-circuited by a common electrode on the side surface of the substrate before the rubbing process, and the short-circuited part is removed by polishing or the like after the rubbing process. This can be prevented, and furthermore, since the board size does not decrease significantly when the short circuit is removed, there is an effect that the effective display area can be designed to be large for the same board size.

[Brief explanation of drawings]

FIG. 1 shows one embodiment of the liquid crystal display element of the present invention.
Figure (a) is a plan view, Figure 1 (bl is a side view, Figure 2 is a perspective view showing the short circuit part in Figure 1, Figure 3 is a perspective view with the short circuit part removed, Figures (al shows the case where all the short-circuited parts on the side surface of the substrate are removed, and Figure 3 (bl shows the case where part of the short-circuited parts on the side surface of the substrate are removed). 1.2...Glass substrate, 6. 3...Display electrode pattern, 4.4...
...Common electrode, 5... Electrode pattern.

Claims (1)

[Claims] A method of manufacturing a liquid crystal display element in which alignment treatment is performed by a rubbing method, characterized in that a common electrode for short-circuiting display electrode patterns is provided on the side surface of the substrate, and the common electrode is removed after the rubbing treatment. Production method.