Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1995-11-30
1999-04-06
Sikes, William L.
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349 86, 349 92, 349180, 349189, G02F 11333, G02F 113, G02F 11341
Patent
active
058925600
ABSTRACT:
A liquid crystal cell filled with a polymer-dispersed liquid crystal layer 15 comprising liquid crystal droplets 15.sub.1 dispersed in a polymer 15.sub.2 between a first glass base plate 11 with a first transparent electrode 12 and a second glass base plate 13 with a second transparent electrode 14, is placed between crossed Nicols formed by a first polarizer 16 and a second polarizer 17, with a backlight 18 situated on the outer side thereof, the diameter of the liquid crystal droplets 15.sub.1 is between 3 .mu.m and 100 .mu.m, and the liquid crystal molecules in the liquid crystal droplets 15.sub.1 are twisted to between 30.degree. and 180.degree.. The liquid crystals used have a dielectric anisotropy .DELTA..epsilon. which is negative when the frequency of the electric field is high and positive when the frequency is low, and by adjusting the dielectric anisotropy .DELTA..epsilon. via the frequency of the electric field it is possible to form liquid crystal droplets of a desired diameter.
REFERENCES:
patent: 4944576 (1990-07-01), Lacker et al.
patent: 5142389 (1992-08-01), Fergason
patent: 5473450 (1995-12-01), Yamada et al.
Iimura et al., "44.1: Invited Address: Electro-Optic Characteristics of Amorphous and Super-Multidomain TN-LCDs Prepared by a Non-Rubbing Method," SID 94 DIGEST, ISSN00970966X/94/2501-0915, pp. 915-918.
Chida Hideo
Hanaoka Kazutaka
Nakamura Kimiaki
Sasaki Takahiro
Tsuda Hideaki
Fujitsu Limited
Ngo Julie
Sikes William L.
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