Dichroic liquid crystal compositions

Details Dichroic liquid crystal compositions Dichroic liquid crystal compositions

1977-06-02

1978-12-05

Padgett, Benjamin R.

Compositions

Liquid crystal compositions

252408, 350349, 350350, 260144, 260154, 260156, 260169, 260184, 260186, C09K 334, G02F 113

Patent

active

041284976

ABSTRACT:
Dichroic liquid crystal compositions for use in displays are mixtures of a liquid crystal host material and at least one of a plurality of dyes each having a plurality of azo (--N.dbd.N--) bonding groups and a high order parameter. The dichroic liquid crystal compositions each provide a contrast ratio on the order of 10:1.

REFERENCES:
patent: 3597044 (1971-08-01), Castellano
patent: 3833287 (1974-09-01), Taylor et al.
patent: 3864022 (1975-02-01), Moriyama et al.
patent: 3876286 (1975-04-01), Deutscher et al.
patent: 3915883 (1975-10-01), Van Meter et al.
patent: 3953491 (1976-04-01), Steinstrasser et al.
patent: 3960750 (1976-06-01), Moriyama et al.
patent: 3960751 (1976-06-01), Moriyama et al.
patent: 4002670 (1977-01-01), Steinstrasser
patent: 4032470 (1977-06-01), Bloom et al.
Constant, J. et al., "Pleochroic Dyes with High Order Parameters," presented at 6th Intnat'l L. C. Conf., Kent, Ohio (Aug. 23-27 1976).
Blinov, L., et al., J. Phys. (Paris), vol. 36, Cl., No. 3, pp. 69-76 (1975).
White, D., et al., J. Appl. Phys., vol. 45, No. 11, pp. 4718-4723 (1974).
Bloom, A., et al., Mol. Cryst. Liq. Cryst., vol. 41, pp. 1-4 (8/18/77).

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