Liquid crystal display device

• US 5,691,794 A
• Filed: 01/31/1994
• Issued: 11/25/1997
• Est. Priority Date: 02/01/1993
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Genchi, Yutaka, Sugawa, Shigetoshi, Fukumoto, Yoshihiko, Inoue, Shunsuke, Miyawaki, Mamoru, Kamio, Masaru, Hoshi, Junichi, Hamamoto, Osamu
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): Duong, Tai V.
• Application Number:
  US08/189,169
• Time in Patent Office: 1,394 Days
• Field of Search: 359/54, 359/58, 359/59, 359/74, 359/82, 359/83, 349/122, 349/153, 349/158, 349/160, 349/143, 349/95, 349/58, 349/57
• US Class Current: 349/158
• CPC Class Codes: G02F 1/1333 Constructional arrangements; Manufacturing methodsG02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/13454 Drivers integrated on the active matrix substrate G02F1/136277 takes precedence

Abstract

A liquid crystal display device comprised of picture element electrodes provided on a first plane of a substrate and an opposed electrode placed opposedly to the picture element electrodes, between which a liquid crystal is carried, characterized in that in a region of the substrate corresponding to the picture element electrodes is formed a concave portion from the second plane opposite the first plane of the substrate, the region being light translucent, and the concave portion having a translucent material enclosed therein.

Claims

1. A liquid crystal display device comprising:

a substrate having a plurality of picture element electrodes provided on a first plane of said substrate;

an opposed electrode oriented opposed to said picture element electrodes; and

a liquid crystal provided between said picture element electrodes and said opposed electrode,

said liquid crystal display device further comprising a concave portion formed in a light-translucent region of said substrate corresponding to said picture element electrodes in a second plane opposite said first plane, and said concave portion being sealed by a transparent substrate to form a space, said space having a light transmitting and flowable material enclosed therein.

2. A liquid crystal display device according to claim 1, wherein said light transmitting and flowable material is a resin.

3. A liquid crystal display device according to claim 1, wherein said light transmitting and flowable material is a liquid crystal or a liquid having substantially the same specific gravity as the liquid crystal provided between said picture element electrodes and said opposed electrode.

4. A liquid crystal display device according to claim 1, wherein said light transmitting and flowable material is an inert gas having nitrogen, helium, neon or argon as the main component.

5. A liquid crystal display device according to claim 1, wherein said substrate is single crystal silicon.

6. A liquid crystal display device according to claim 1, wherein said concave portion is formed by partly removing said substrate by etching.

7. A liquid crystal display device according to claim 1, wherein a passive element or an active element for driving said liquid crystal is disposed on the first plane of said substrate.

8. A liquid crystal display device according to claim 1, wherein an optical element is incorporated into said transparent substrate.

9. A liquid crystal display device according to claim 1, wherein said light transmitting and flowable material is sealed by disposing a seal member between said transparent substrate and said substrate.

10. A liquid crystal display device according to claim 9, wherein the volume change of said light transmitting and flowable material with the temperature variation is substantially equal to the volume change of a space defined by said substrate, said seal member and said transparent substrate.

11. A liquid crystal display device according to claim 10, wherein said seal member is mounted in a groove provided on said substrate.

12. A liquid crystal display device according to claim 10, wherein said seal member is mounted within said concave portion.

13. A liquid crystal display device according to claim 10, wherein said transparent substrate for sealing has a convex shape in cross section in which its central portion protrudes toward a hollow portion.

14. A liquid crystal display device according to claim 1, further comprising a region for absorbing the volume change of said light transmitting and flowable material.

15. A liquid crystal display device according to claim 1, wherein the same material as said light transmitting and flowable material is provided in said region for absorbing the volume change.

16. A liquid crystal display device according to claim 14, wherein a gas is enclosed at least partly in said region for absorbing the volume change.

17. A liquid crystal display device according to claim 1, wherein a resin and an inert gas are enclosed within said concave portion.

18. A liquid crystal display device according to claim 17, wherein said resin has a multi-layer arrangement.

19. A liquid crystal display device according to claim 17, wherein the thickness of said resin is 200 μ

m or less.

20. A liquid crystal display device according to claim 17, wherein said inert gas comprises dry air, dry nitrogen, helium, neon, or argon.