Ferroelectric liquid crystal color filter surrounded by a heat fusible resin

• US 5,500,751 A
• Filed: 04/28/1995
• Issued: 03/19/1996
• Est. Priority Date: 08/30/1986
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Kamio, Masaru, Murata, Tatsuo, Kikuchi, Yoshiki, Tamura, Miki, Takao, Hideaki, Kanbe, Junichiro, Sekimura, Nobuyuki
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): Trice, Ron
• Application Number:
  US08/430,418
• Time in Patent Office: 326 Days
• Field of Search: 359/67, 359/68, 359/74, 359/100
• US Class Current: 349/106
• CPC Class Codes: G02F 1/133514 Colour filters

Abstract

Surface Stability Ferroelectric Liquid Crystal Device having color filters assembled therein avoids generation of alignment defect ocurring in the initial alignment control step by providing space of 0-5 microns between adjacent color filters.

Claims

1. A liquid crystal device comprising:

(a) a pair of transparent electrodes having a plurality of confronting portions formed therebetween;

(b) a pair of substrates, one of said pair substrates supporting each of said pair of transparent electrodes;

(c) a plurality of color filters arranged on the innerside of at least one of the above pair of substrates and arranged at positions corresponding to each of said plurality of confronting portions;

(d) a heat-fusible resin film arranged at the gaps between adjacent color filters, and wherein the heat-fusible resin is above and below the color filters; and

(e) a ferroelectric liquid crystal arranged between said pair of substrates.

2. A liquid crystal device according to claim 1, wherein said color filters are arranged between one of said pair of substrates and one of said pair of transparent electrodes formed on said one of said pair of substrates.

3. A liquid crystal device according to claim 1, wherein a protective film is arrived between said color filters and said pair of transparent electrodes.

4. A liquid crystal device according to claim 1, wherein said heat-fusible resin film is formed of at least one resin selected from the group consisting of polyvinyl acetate, ethylene-vinyl acetate copolymer, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, polyamide, phenoxy resin, ethyl cellulose, polyisobutylene, polyester, terpene resin, rosin and petroleum resin.

5. A liquid crystal device according to claim 1, wherein said color filters are formed according to the photolithographic step of a color resin comprising a colorant material dispersed in a low-temperature-curing polyamino type resin having a photosensitive group in the molecule.

6. A liquid crystal device according to claim 5, wherein said polyamino type resin is an aromatic polyamide resin or polyimide resin having photosensitive group in the molecule and is capable of giving a cured film at 200°

C. or lower.

7. A liquid crystal device according to claim 1, wherein a protective film is provided between said color filters and said pair of electrodes.

8. A liquid crystal device according to claim 1, wherein an alignment control film is provided for said ferroelectric liquid crystal.

9. A liquid crystal device according to claim 8, wherein a monoaxial alignment treatment axis is imparted to said alignment control film.

10. A liquid crystal device according to claim 9, wherein said monoaxial alignment treatment axis is a rubbing treated axis.

11. A liquid crystal device according to claim 1, wherein the film thickness of each color filter is set in the range of from 0.5 μ

m to 5 μ

m.

12. A liquid crystal device according to claim 1, wherein said color filter exhibits blue, green or red color per each color filter.

13. A liquid crystal device according to claim 1, wherein the formation of the spiral structure of the ferroelectric liquid crystal is suppressed.

14. A liquid crystal device according to claim 13, wherein said color filters are arranged between the substrates and the transparent electrodes.

15. A liquid crystal device according to claim 13, wherein a protective film is arranged between said color filters and the transparent electrodes.