Compositions – Liquid crystal compositions – Containing nonchiral aligning agents
Patent
1996-07-25
1999-01-12
Kelly, C. H.
Compositions
Liquid crystal compositions
Containing nonchiral aligning agents
25229901, 2522996, 25229961, 25229962, 25229963, 428 1, 349123, 349184, C09K 1956, C09K 1952, C09K 1902, G02F 11337
Patent
active
058582738
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 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 planar tetravalent organic residue group comprising an aromatic ring, an aromatic polycyclic ring, a heterocyclic ring or a condensed polycyclic ring, and B denotes a divalent aliphatic group comprising .paren open-st.CH.sub.2 .paren close-st..sub.n (n: an integer of at least 1) or an alicyclic ring. The chiral smectic liquid crystal composition may 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: 4879059 (1989-11-01), Hanyu et al.
patent: 5082587 (1992-01-01), Janulis et al.
patent: 5129727 (1992-07-01), Hanyu et al.
patent: 5262082 (1993-11-01), Janulis et al.
patent: 5285304 (1994-02-01), Hotta et al.
patent: 5320883 (1994-06-01), Asaoka et al.
patent: 5364668 (1994-11-01), Takimoto et al.
patent: 5399291 (1995-03-01), Janulis et al.
patent: 5417883 (1995-05-01), Epstein et al.
patent: 5437812 (1995-08-01), Janulis et al.
patent: 5443864 (1995-08-01), Takimoto et al.
patent: 5464668 (1995-11-01), Asaoka et al.
patent: 5482650 (1996-01-01), Janulis et al.
patent: 5497257 (1996-03-01), Hotta et al.
patent: 5510159 (1996-04-01), Asaoka et al.
patent: 5545444 (1996-08-01), Nakayama et al.
patent: 5578241 (1996-11-01), Plach et al.
patent: 5612450 (1997-03-01), Mizushima et al.
patent: 5657141 (1997-08-01), Terada et al.
patent: 5658491 (1997-08-01), Kistner et al.
patent: 5686019 (1997-11-01), Nakamura
M. Schadt & W.Helfrich, Appl. Phys. Lett., v. 18 No. 4, Feb. 15, 1971, pp. 127-128.
Clark & Lagerwall, Japan Display '86, pp. 456-458.
Y. Ouchi et al., Japanese Journal of Appl. Phys., v. 27 No. 5, May 1988, L725-L728.
A.D.L. Chandani et al., Japanese Journal of Applied Physics, v. 27 No. 5, May 1988, L729-L732.
Structures and Properties of Ferroelectric Liquid Crystals (1990) 344-357.
Future Liquid Crystal Display and its Materials (1992) Ch. 3 and 5.
4th Intl. FLC Conf., P-46 (1993) 169-170.
Asao Yasufumi
Asaoka Masanobu
Hanyu Yukio
Ito Nobuhiro
Moriyama Takashi
Canon Kabushiki Kaisha
Kelly C. H.
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-1511237