JPH05224218A - Liquid crystal device - Google Patents

Abstract

PURPOSE:To obtain a liquid crystal device in which the area of an effective picture element is enlarged, and which has high image quality and is excellent in contrast without increasing the short-circuit defect of a transparent electrode pattern formed on a substrate in the liquid crystal device constituted by holding liquid crystal between a pair of substrates. CONSTITUTION:The 1st transparent electrode pattern 2 is formed on the surface of the substrate 1, and the 2nd transparent electrode pattern 4 is formed on the upper layer of the pattern 2, that is, at least on the upper surface of the gap part of the 1st pattern 2 through a transparent insulating film 3, then the pattern 2 and the pattern 4 adjacent to the pattern 2 are electrically connected at the end of the electrode pattern.

Description

Detailed Description of the Invention

[0001]

This invention relates to a computer terminal,
The present invention relates to an electro-optical device using liquid crystal used in a system such as an image display device and a shutter, and particularly to a structure of a transparent electrode provided on a substrate.

[0002]

2. Description of the Related Art As a dot-matrix type display device, a liquid crystal display device, which is thin, lightweight and has low power consumption, has been attracting attention. FIG. 2A shows a schematic plan view of a substrate used in a conventional liquid crystal device, and FIG. 2B shows a schematic plan view of a conventional liquid crystal device. In such a liquid crystal device, first, a transparent conductive film such as ITO is formed on the surface of the substrate 8 by a vapor deposition method or a sputtering method, and the stripe-shaped transparent electrode pattern group 9 is subjected to processes such as exposure, development and etching. To form. By using a pair of these substrates and sandwiching the liquid crystal with the electrode surfaces facing each other such that the stripe-shaped transparent electrode patterns are orthogonal to each other, the intersecting portions 10 of the electrode patterns serve as pixels to form a matrix liquid crystal device. Was there.

[0003]

The above-mentioned electrode shape is characterized by a simple structure and excellent mass productivity. However, in the case of a matrix type liquid crystal device, the effective pixel area is enlarged, In order to improve the image quality, it is necessary to make the gap between the electrode patterns as small as possible. However, the transparent electrodes are patterned by etching, so if the gap is made small, when minute dust floating in the air adheres to the substrate or exposure mask, a short circuit will occur between adjacent electrode patterns. It is easy to cause a defect such as a drop in the yield, which is a cause of lowering the yield.

The present invention aims to increase the area of a pixel without causing such a problem, and specifically, to improve the image quality.

[0005]

In order to solve the above-mentioned problems, the present invention provides a liquid crystal device comprising a pair of substrates and a liquid crystal sandwiched between the substrates. A second transparent electrode pattern is formed on the upper surface of at least the gap portion of the first transparent electrode pattern via a transparent insulating film, and the first transparent electrode pattern and the second transparent electrode adjacent to the first transparent electrode pattern. Electrode pattern,
It is characterized in that it is electrically connected at the end of the electrode pattern.

[0006]

In the liquid crystal device constructed as described above,
Since the gap portion of the first transparent electrode pattern provided on the substrate is covered with the second transparent electrode pattern via the transparent insulating film, the pixel is formed by the area in which both the transparent electrode patterns are combined. Therefore, no gap is generated between adjacent pixels.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 3A and 3B are a vertical cross-sectional schematic diagram and a plan schematic diagram, respectively, of a substrate related to the liquid crystal device according to the present invention. A transparent electrode layer was provided on the surface of the glass substrate 1 by a vapor deposition method, a sputtering method, or the like, and a first transparent electrode pattern 2 was formed by etching. After that, the transparent insulating film 3 containing SiO ₂ as a main component was provided on the entire surface of the pixel portion of the transparent electrode pattern by a printing method or the like. Then, the second transparent electrode pattern 4 is formed in a position so as to cover the electrode gap portion 5 of the first transparent electrode pattern 2 by the same method as described above, and the end portion 6 has a one-to-one correspondence. And is electrically connected to the adjacent first transparent electrode pattern. Then, a polyimide-based alignment film was applied to this substrate by a printing method or a spinner method, baked at 200 for 60 minutes, and then rubbed. FIG. 1 shows a schematic vertical cross-sectional view of a liquid crystal device of the present invention in which a pair of substrates thus formed are opposed to each other and a liquid crystal 12 is sandwiched therebetween.

FIG. 4 is a schematic plan view of the liquid crystal device of the present invention. In the liquid crystal device having such a structure, there is no gap between pixels as shown by 11 in the figure, and excellent image quality is obtained. A liquid crystal device was obtained. In the above embodiments, the twisted nematic type and the super twisted type for horizontal alignment are used as the liquid crystal device, but the same applies to liquid crystal devices other than nematic type such as homeotropic type and ferroelectric liquid crystal for vertical alignment. The effect of was obtained.

[0009]

As described above, according to the present invention, in the liquid crystal device in which the liquid crystal is sandwiched between the pair of substrates, the first transparent electrode pattern is formed on the surface of the substrate, and the transparent insulating film is formed on the first transparent electrode pattern. A second transparent electrode pattern is formed on at least the upper surface of the gap of the first transparent electrode pattern, and the first transparent electrode pattern and the second transparent electrode pattern adjacent thereto are formed through the electrode. By electrically connecting the pattern end portions, the effective area of the pixel can be easily increased, and a liquid crystal device with high contrast and high image quality can be manufactured with high yield.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of a liquid crystal device of the present invention.

FIG. 2 is a schematic plan view of a substrate relating to a conventional liquid crystal device, (a) is a plan view of one substrate, and (b) is a plan view when two substrates are superposed.

3A is a schematic vertical sectional view of a substrate relating to the liquid crystal device of the present invention, and FIG. 3B is a schematic plan view.

FIG. 4 is a schematic plan view showing a display state of the liquid crystal device of the present invention.

[Description of Reference Signs] 1 substrate 2 first transparent electrode pattern 3 transparent insulating film layer 4 second transparent electrode pattern 5 gap between first transparent electrode patterns 6 electrical connection between first and second transparent electrode patterns 7 Alignment Film Layer 8 Substrate 9 Transparent Electrode Pattern 10 Intersection (Pixel) of Transparent Electrode Patterns 11 Intersection (Pixel) of Transparent Electrode Patterns 12 Liquid Crystal

Claims (1)

[Claims] 1. A dot matrix type liquid crystal display device comprising a pair of substrates and a liquid crystal sandwiched between the substrates. A plurality of first transparent electrode patterns and a plurality of the first transparent electrode patterns are provided on the surface of one substrate. A transparent insulating film formed on the above,
Consisting of a plurality of second transparent electrode patterns respectively corresponding to the first transparent electrode pattern formed on the transparent insulating film, the corresponding first and second transparent electrode pattern at the end thereof. , Each electrically connected, and each of the second transparent electrode pattern,
A dot matrix type liquid crystal display device, characterized in that the dot matrix type liquid crystal display device overlaps with the first transparent electrode pattern and a part thereof extends to an upper surface of a gap formed by the first transparent electrode pattern.