Liquid crystal device

Details Liquid crystal device Liquid crystal device

1997-07-18

1999-12-14

Wu, Shean C.

Compositions

Liquid crystal compositions

Containing nonchiral aligning agents

25229901, 349123, 349124, 349133, 349135, 428 126, C09K 1956, C09K 1952, G02F 11337

Patent

active

060012765

ABSTRACT:
A liquid crystal device is constituted by a pair of transparent substrates each having thereon a transparent electrode, and a chiral smectic liquid crystal composition lacking cholesteric phase disposed between the substrates so as to assume at least two optically stable states. At least one of the substrates is provided with an alignment film which comprises a polyimide represented by a recurring unit of formula (I) shown below and has been subjected to a uniaxial aligning treatment. ##STR1## wherein A denotes a tetravalent aliphatic hydrocarbon group free from a planar structure or a tetravalent alicyclic hydrocarbon group, and n is an integer of at least 1. The chiral smectic liquid crystal composition may preferably contain at least one species of fluorine-containing mesomorphic compound comprising a fluorocarbon terminal portion and a hydrocarbon terminal portion connected with a central core and having a smectic phase or a latent smectic phase.

REFERENCES:
patent: 4367924 (1983-01-01), Clark et al.
patent: 5082587 (1992-01-01), Janulis
patent: 5129727 (1992-07-01), Hanyu et al.
patent: 5192596 (1993-03-01), Hanyu et al.
patent: 5250330 (1993-10-01), Asaoka et al.
patent: 5262082 (1993-11-01), Janulis et al.
patent: 5320883 (1994-06-01), Asaoka et al.
patent: 5325219 (1994-06-01), Hanyu et al.
patent: 5326600 (1994-07-01), 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: 5552193 (1996-09-01), Asaoka et al.
patent: 5568295 (1996-10-01), Nakamura 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: 5666217 (1997-09-01), Kaneko et al.
Schadt & Helfrich, "Voltage-dependent optical activity of a twisted nematic liquid crystal", Appl. Phys. Lett. 18(4), Feb. 15, 1971, pp. 127-128.
Clark & Lagerwall, Japan Display '86, Sep. 30-Oct. 2, 1986, pp. 456-458.
Ouchi et al., Japanese Journal of Appl. Phys. 27(5), May 1988, L725-L728.
Chandani et al., Japanese Journal of App. Phys. 27(5), May 1998, L729-L732.
Atsuo Fukuda et al., Structures and Properties of Ferroelectric Liquid Crystals, Corona Publ. Co. Tokyo, Japan, 1990.
Radcliffe et al., 4th Int'l Ferroelectric Liquid Crystal Conference, 1993, p. 46.
Atsuo Fukuda (ed.), Future Liquid Crystal Display and its Materials, 1992.

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