JPH02166420A - Liquid crystal electrooptic element - Google Patents

Abstract

PURPOSE:To prevent light from leaking between transparent electrodes and to improve display characteristics by providing light shielding bodies made of metal on one substrate at the parts corresponding to the parts between the transparent electrodes when the substrate is assembled on transparent electrodes of the other substrate. CONSTITUTION:On the substrates 11 and 12 made of glass, ITO is patterned in stripes by photolithography to form the transparent electrodes 13 and 14. Then the respective electrodes are plated with nickel by electroless plating and when the substrates 11 and 12 are assembled, the nickel is left by photolithography at the parts corresponding to the parts between the transparent electrodes of the substrates to form the light shielding bodies 15. Further, an orienting film for liquid crystal is formed thereupon and rubbed to assemble liquid crystal cells, and ferroelectric smectic liquid crystal is enclosed. Consequently, the liquid crystal electrooptic element is nearly free from light leak between transparent electrodes and have excellent contrast characteristics.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application IP] The present invention relates to a liquid crystal electro-optical element, and particularly to a transparent electrode structure.

[Prior art] In recent years, FSC (ferroelectric liquid crystal), DSTN
With the advent of (double bar twist type liquid crystal) etc.
The characteristics of liquid crystal electro-optical elements have improved dramatically. but,
As for the electrode structure, as shown in FIG. 2, there is no change from the conventional electrode structure.

[5! The division that Akira is trying to solve! ! [I] However, due to the operating principle of these large-capacity type liquid crystal electro-optic elements,
It has the property of easily causing light leakage in the gap between the electrodes. That is, in FSC, domains that transmit light and domains that do not transmit light coexist between electrodes where no electric field is applied due to bistability, while in DSTN, differences in electrode levels cause light leakage. Therefore, the above-mentioned conventional method shown in FIG. 2 cannot prevent light leakage between the transparent electrodes, and there is a problem in that the originally excellent characteristics of the liquid crystal electro-optic device cannot be sufficiently exhibited.

[Means for Solving the Problems] The liquid crystal electro-optical element of the present invention is a liquid crystal electro-optical element in which a liquid crystal is sandwiched between two substrates each having a transparent electrode.
A light shield made of metal is provided on the transparent electrodes of at least one of the substrates at a portion corresponding to between the transparent electrodes of the other substrate when assembled with the other substrate. do.

Hereinafter, the details of the present invention will be shown by examples.

[Example] FIG. 1 shows a schematic plan view of a liquid crystal electro-optical element in an example of the present invention. FIG. 1(a) is a diagram showing the electrode structure of one substrate, and FIG. 1(b) is a diagram seen from the front when assembled with the other substrate. Substrate 1 made of glass
Transparent electrodes 13 and 14 were formed on 1.12 by patterning IT and O in stripes using photolithography. After that, electroless nickel plating is applied on each electrode for approximately 2000 μm.
When the substrates 11 and 12 were assembled by hand and photolithography, nickel was left on only the portion corresponding to between the transparent electrodes of each substrate, and this was used as the light shield 15.

Furthermore, a liquid crystal alignment film was provided on this, a liquid crystal cell was assembled by rubbing, and ferroelectric smectic liquid crystal was sealed. The returned liquid crystal electro-optical device exhibited excellent contrast characteristics with almost no light leakage between the transparent electrodes. In addition, since a light shield is provided on each transparent electrode,
The pattern accuracy during formation was rough, and light could be easily blocked between the transparent electrodes.

The above embodiment shows a part of the present invention, and although nickel was used as the light shield, other metals may also be used. Further, the metal forming method, thickness, width, etc. can be arbitrarily selected and are not limited to the conditions of this embodiment, and the liquid crystal material may also be made of materials other than those of this embodiment.

[Effects of the Invention] As described above, according to the present invention, it is possible to only prevent light leakage between the transparent electrodes of a liquid crystal electro-optical element, and therefore a large-sized, high-capacity liquid crystal electro-optical element with excellent display characteristics can be produced. It has an effect that is easily obtained.

FIG. 3 is a diagram showing a schematic plan view of a character element. FIG. 1(a) is a diagram showing the electrode structure of one substrate, and FIG. 1(b) is a diagram seen from the front when assembled with the other substrate. FIG. 2(a) is a diagram showing the electrode structure of one substrate, and FIG. 2(b) is a diagram seen from the front when assembled with the other substrate.

11. Board 12. Substrate 13. Transparent electrode 14. Transparent electrode 15. Light blocker (D) that's all Applicant: Seiko Epson Corporation Representative Patent Attorney: Masayoshi Kamiyanagi (1 other person) (Tonneau Figure 1

Claims (1)

[Claims] (1) In a liquid crystal electro-optical device in which a liquid crystal is sandwiched between two substrates each having a transparent electrode, when assembled on the transparent electrode of at least one of the substrates with the other substrate, A liquid crystal electro-optical element, characterized in that a light shield made of metal is provided in a portion of the other substrate corresponding to between the transparent electrodes.