Stock material or miscellaneous articles – Liquid crystal optical display having layer of specified... – With charge transferring layer of specified composition
Patent
1993-09-20
1995-06-27
Nagumo, Mark
Stock material or miscellaneous articles
Liquid crystal optical display having layer of specified...
With charge transferring layer of specified composition
359 75, 359 78, C09K 1950
Patent
active
054278287
ABSTRACT:
A cholesteric liquid crystal compound having the following general formula (I), and a polymric cholesteric liquid crystal compound formd by polymerization thereof and a polymer dispersed liquid crystal display device having an improved contrast and driving voltage which is prepared by coating surfaces of two glass substrate plates with the above liquid crystal or the polymer liqui crystal formed by polymerization thereof in a thickness of 50-1000 .ANG., injecting a conventional nematic liquid crystal and a polymer gel precursor into a space formed between the two glass plates and subjecting them to the polymerization under ultraviolet light radiation are disclosed. ##STR1## wherein Y represents hydrogen, a hydrocarbon radical having one or more carbon atoms, and optionally containing one or more hetero atoms selected from the group consisting of oxygen, sulfur and nitrogen,
REFERENCES:
patent: 3930716 (1976-01-01), Robert
J. W. Doane et al. (1991) IEEE 8, 175-178 "Current Trends in Polymer dispersed liquid Crystals".
D. K. Yang et al. (1991) IEEE 8, 49-52 "Cholesteric Liquid Crystal/Polymer Gel dispersion bistable at zero field".
R. T. Morrison and R. N. Boyd, Organic Chemistry, 3rd Ed Allyn and Bacon, Inc. Boston, 1973, p. 21.
Nagumo Mark
Samsung Electron Devices Co. Ltd.
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