JPH06294965A - Liquid crystal display device - Google Patents

Abstract

PURPOSE:To dispose spacers into an insulating film material so that the spacers no longer receive the static electricity generated during production process and the influence of stresses after superposition and that the spacers disposed on oriented films are not peeled and fallen according to orientation treatment conditions in the orientation treatment after the formation of the oriented films. CONSTITUTION:This liquid crystal display device is formed by forming electrodes 2a, 2b on substrates 1a, 1b and providing these substrates 1a, 1b thereon with the oriented films 3. A liquid crystal layer is formed by clamping a liquid crystal 7 between two sheets of the substrates 1a and 1b and the spacers 6 for holding a prescribed spacing between the substrates 1a and 1b are clamped therebetween. At least one sheet of the substrate 1b is provided with the insulating film 3 between the electrodes 2b and the oriented film 4b and the spacers 6 are disposed in thin insulating film 3. Since the spacers 6 added to the oriented film 3 are fixed in the insulating film 3, the biasing of the spacers 6 by the static electricity generated during production dose not arise.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device used for a liquid crystal television, a liquid crystal projector and the like.

[0002]

2. Description of the Related Art FIG. 2 shows the structure of a conventional liquid crystal display device. In FIG. 2, electrodes 2a and 2b, which are arranged in stripes or in a matrix in which voltages can be individually controlled, are arranged on the opposite surfaces of substrates 1a and 1b, and a liquid crystal display device is further provided on the electrodes 2b. LCD 7 when manufacturing
Electrodes 2 facing each other via a conductive foreign substance mixed in
An insulating film 3 for preventing conduction failure caused by contact with a and 2b is provided, and alignment films 4b and 4a are laminated on the electrode 2a opposed to the insulating film 3. Further, the substrates 1a and 1b are opposed to each other at a predetermined interval via a spacer 6, and the liquid crystal 7 is sandwiched between the substrates 1a and 1b. Although not shown in FIG. 2, in the liquid crystal display device of FIG. 2, an appropriate AC voltage is applied between the electrodes 2a and 2b by the liquid crystal display driving device to perform display. However, in the conventional liquid crystal display device on which the alignment film is formed, the spacer distribution is offset due to static electricity generated during the manufacture of the liquid crystal display device and the stress after the stacking. However, there is a problem in that the display quality becomes poor due to the unevenness of the intervals between the liquid crystal display devices.
3016 discloses that it is preferable to dispose a spacer in the alignment film.

[0003]

However, Japanese Unexamined Patent Publication (Kokai) No. 4-2.
In the conventional liquid crystal display device as disclosed in Japanese Laid-Open Patent Publication No. 93016, in the alignment treatment after forming the alignment film, there is a problem that the spacers arranged in the alignment film may peel off depending on the alignment treatment conditions.

In order to solve the conventional problems, it is an object of the present invention to prevent the spacers from being affected by static electricity generated during the manufacturing process of the liquid crystal display device and stress after the alignment, and the alignment. It is an object of the present invention to provide a liquid crystal display device in which, in the alignment treatment after film formation, the spacers arranged in the alignment film are prevented from peeling off depending on the alignment treatment conditions.

[0005]

The present invention for achieving the above object is intended to provide a substrate between at least two substrates each having an electrode formed on the substrate and an alignment film provided on the electrode. In a liquid crystal display device in which a liquid crystal is sandwiched between the substrates to form a liquid crystal layer, and spacers for sandwiching the substrates at predetermined intervals are sandwiched, at least one of the substrates includes the electrode and the alignment film. An insulating film is provided therebetween, and the spacer is provided in at least one of the insulating films.

[0006]

In the liquid crystal display device constructed as described above, since the spacer is fixed by the insulating film, the spacer may be affected by static electricity generated during the manufacturing process of the liquid crystal display device and stress after stacking. No more offset of the spacers. Further, by disposing the spacer in the insulating film, the spacer is prevented from peeling off in the alignment treatment after forming the alignment film.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, 1a and 1b in the figure are transparent substrates made of glass or the like, 2a and 2b are electrodes which are transparent electrodes, 3 is an insulating film, 4a and 4b are alignment films,
5 is a sealant for containing the liquid crystal 7, and 6 is a spacer.

In the present invention, an inorganic material is used as the insulating film material forming the insulating film 3, and glass beads having a particle diameter of 5 μm are added as spacers 6 to the insulating film material. Next, by flexographic printing, printing was performed on the ITO electrode 2b formed on the substrate 1b. The thickness of the insulating film 3 is 600 ang long m. And substrate 1b 3
The insulating film 3 was cured by firing at 00 ° C. for 1 hour. In this state, the spacer 6 added to the insulating film 3 is fixed to the insulating film 3, so that the spacer 6 is not biased due to static electricity generated during the manufacture of the liquid crystal display device. After that, the alignment films 4b and 4a are formed by a flexographic printing method,
Next, orientation treatment is performed with a rubbing cloth. On the other hand, the substrate 1a
The alignment film 4a is formed on the ITO electrode 2b formed on the
Is formed by a flexographic printing method, and then an alignment treatment is performed with a rubbing cloth.

The substrate 1b on which electrodes, an alignment film, an insulating film, and a spacer are formed, and on which the sealant 5 is disposed, is superposed on the substrate 1a so that the electrodes face each other, and then liquid crystal is injected to obtain the liquid crystal shown in FIG. Manufacture display devices.

[0010]

As described above, according to the present invention, the spacers are arranged in the insulating film material. Therefore, the spacers generate static electricity during the manufacturing process of the liquid crystal display device and stress after superposition. Will not be affected and the spacer will not be offset. In addition, in the alignment treatment after the formation of the alignment film, the spacer disposed in the alignment film is prevented from peeling off depending on the alignment treatment conditions.

In the above-mentioned embodiment, the substrate on which the insulating film is arranged is only one substrate, but the insulating film may be formed on both substrates, and in the embodiment, the one-layer display device is described. The same effect as that of the single-layer display device can be obtained for the multi-layer display device.

Further, if the liquid crystal display device is a liquid crystal display device using a spacer for maintaining a predetermined gap between liquid crystal layers of twist nematic type, super twist nematic type, etc., regardless of the type of liquid crystal. The same effect can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a liquid crystal display device of the present invention.

FIG. 2 is a cross-sectional view showing a conventional liquid crystal display device.

[Explanation of symbols]

 1a, 1b Substrate 2a, 2b Electrode 3 Insulating film 4a, 4b Alignment film 5 Sealant 6 Spacer 7 Liquid crystal

Claims (1)

[Claims] 1. A liquid crystal layer is formed by sandwiching a liquid crystal between substrates formed by forming an electrode on a substrate and providing an alignment film on the electrode, and forming a liquid crystal layer between the substrates. In a liquid crystal display device in which a spacer for holding at a predetermined interval is sandwiched, an insulating film is provided between the electrode and the alignment film on at least one of the substrates,
A liquid crystal display device, wherein the spacer is provided in at least one insulating film.