Liquid crystal cells – elements and systems – With specified nonchemical characteristic of liquid crystal... – Within smectic phase
Patent
1993-10-22
1997-08-05
Gross, Anita Pellman
Liquid crystal cells, elements and systems
With specified nonchemical characteristic of liquid crystal...
Within smectic phase
349129, 349133, G02F 11337, G02F 1141, G02F 113
Patent
active
056547846
ABSTRACT:
A liquid crystal device comprises a pair of substrates and a liquid crystal provided between the paired substrates wherein domains whose threshold voltages are different from one another are finely distributed throughout the liquid crystal. In particular, the respective substrates each has a transparent electrode and an alignment film formed thereon in this order and the substrates are assembled to establish a given space therebetween, and a ferroelectric liquid crystal being injected into the given space wherein domains are finely distributed as set out above, thereby providing a a liquid crystal display device. The fine distribution is such that when a transmittance through inverted domains is 25%, the number of domains (microdomains) having a size of larger than 2 .mu.m.phi. in a field of 1 mm.sup.2 is not smaller than 300, preferably not smaller than 600, and the width of the threshold voltage within the domains is not smaller than 2 volts within a transmittance range of from 10 to 90%. The liquid crystal device, particularly the display device, keeps a high contrast and can easily, reliably realize an analog gray-scale display at low costs.
REFERENCES:
patent: 3620889 (1971-11-01), Baltzer
patent: 3734597 (1973-05-01), Churchhill et al.
patent: 4796979 (1989-01-01), Tsuboyamon
patent: 4861143 (1989-08-01), Yamazaki et al.
patent: 4906074 (1990-03-01), Yamazaki et al.
patent: 4986638 (1991-01-01), Yamazaki et al.
patent: 5078477 (1992-01-01), Jono et al.
patent: 5138472 (1992-08-01), Jones et al.
patent: 5155611 (1992-10-01), Yamazaki et al.
patent: 5196954 (1993-03-01), Yamazaki et al.
patent: 5223963 (1993-06-01), Okada et al.
patent: 5321538 (1994-06-01), Maruyama et al.
patent: 5347379 (1994-09-01), Yamazaki et al.
patent: 5353140 (1994-10-01), Yamazaki et al.
patent: 5381256 (1995-01-01), Hanyu et al.
Patent Abstracts of Japan, No. JP3276126, vol. 016, No. 096, 10 Mar. 1992, Kazuo, I., "Ferroelectric Liquid Crystal Panel".
Yasuda et al., "Molecular Alignment Engineering for Ferroelectric Liquid Crystals by SiO Obliquely Evaporated Films", Proceedings of the 12th Int. Display Research Conf, Japan Display '92, Paper P2-21, 12 Oct. 1992, pp. 511-514.
Patent Abstracts of Japan, vol. 015, No. 116, 20 Mar. 1991 & JP-A-03 006 526, Matsushita Electric Ind. Co. Ltd., 14 Jan. 1991.
Verhulst A G H et al., Proceedings of the SID, vol. 32, No. 4, 1991, pp. 379-386.
Ouchi Y et al., Japanese Journal of Applied Physics, Letters, vol. 27, No. 11, Nov. 1988, pp. 1993-1995.
Martinot-Lagarde P et al., Molecular Crystals and Liquid Crystals, vol. 75, No. 1-4, 1981, pp. 249-286.
Bao Yang Ying
Matsui Eriko
Nito Keiichi
Takanashi Hidehiko
Yasuda Akio
Gross Anita Pellman
Sony Corporation
Ton Toan
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