Stock material or miscellaneous articles – Liquid crystal optical display having layer of specified... – Alignment layer of specified composition
Patent
1998-09-17
2000-10-31
Wu, Shean C.
Stock material or miscellaneous articles
Liquid crystal optical display having layer of specified...
Alignment layer of specified composition
25229901, 2522994, 428 125, 349123, 349126, 349128, 349133, 349137, C09K 1952, C09K 1956, G02F 11337
Patent
active
061399272
ABSTRACT:
A liquid crystal device is constituted by a pair of substrates each provided with an electrode, and a chiral smectic liquid crystal composition disposed between the substrates. At least one of the substrates is provided with an alignment control film of a polyimide represented by the following formula (I): ##STR1## in which A denotes a planar tetravalent organic residue group; B denotes a divalent group represented by --CR.sub.1 (R.sub.2)-- where R.sub.1 and R.sub.2 independently denote H or alkyl group; a, b and c are independently 0 or 1; x and y are independently an integer of at least 0 and x+y=at least 1; and n is an integer of at least 2.
REFERENCES:
patent: 4876330 (1989-10-01), Higashi et al.
patent: 4879059 (1989-11-01), Hanyu et al.
patent: 5064697 (1991-11-01), Takiguchi et al.
patent: 5320883 (1994-06-01), Asaoka et al.
patent: 5326600 (1994-07-01), Asaska et al.
patent: 5330803 (1994-07-01), Takao et al.
patent: 5381256 (1995-01-01), Hanyu et al.
patent: 5400159 (1995-03-01), Takao et al.
patent: 5419931 (1995-05-01), Asaoka et al.
patent: 5419932 (1995-05-01), Togano et al.
patent: 5464668 (1995-11-01), Asaoka et al.
patent: 5510159 (1996-04-01), Asaoka et al.
patent: 5518782 (1996-05-01), Takao et al.
patent: 5552193 (1996-09-01), Asaoka et al.
patent: 5576864 (1996-11-01), Takao et al.
patent: 5587211 (1996-12-01), Togano et al.
patent: 5626925 (1997-05-01), Asaoka et al.
patent: 5633740 (1997-05-01), Asaoka et al.
patent: 5657141 (1997-08-01), Terada et al.
patent: 5686019 (1997-11-01), Nakamura
patent: 5714209 (1998-02-01), Asaoka et al.
patent: 5750214 (1998-05-01), Ito et al.
patent: 5790223 (1998-08-01), Hanyu et al.
patent: 5835248 (1998-11-01), Hanyu et al.
patent: 5841497 (1999-11-01), Sato et al.
patent: 5858269 (1999-01-01), Shinjo et al.
patent: 5858273 (1999-01-01), Asaoka et al.
patent: 5885482 (1999-03-01), Asaoka et al.
patent: 5932136 (1999-08-01), Terada et al.
Marc D. Radcliffe et al., "Smectic A and Smectic C Materials with Large Negative Thermal Expansion Coefficients, p. 46", pp. 169-170, 1993.
Atsuo Fukuda et al., "Structure and Properties of Ferroelectric Crystals, 1990", pp. 344-356, 1990.
A.D.L. Chandani et al., "Tristable Switching in Surface Stabilized Ferroelectric Liquid Crystals with a Large Spontaneous Polarization", Japanese Journal of Applied Physics, vol. 27, No. 5, May, 1988, pp. L729-L732.
Akihiro Mochizuki et al., "Future Liquid Crystal Display and its Materials", pp. 37-72, 1992.
N.A. Clark et al., "Structures and Applications of SSFLC Devices", Proceedings of the 6.sup.th International Display Research Conference, 1986, pp. 456-458.
M. Schadt et al., Voltage-Dependent Optical Activity of a Twisted Nematic Liquid Crystal, Applied Physics Letters, vol. 18, No. 4, Feb., 1971, pp. 127-128.
Yukio Ouchi et al., "Smectic C" Chevron Layer Structure Studied by X-Ray Diffraction, Japanese Journal of Applied Physics, vol. 27, No. 5, May, 1988. pp. L725-L728.
Arai Katsumi
Asao Yasufumi
Mori Shosei
Moriyama Takashi
Shimizu Yasushi
Canon Kabushiki Kaisha
Wu Shean C.
LandOfFree
Liquid crystal device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Liquid crystal device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2048567