Dichroic liquid crystal compositions

Details Dichroic liquid crystal compositions Dichroic liquid crystal compositions

1977-08-18

1978-09-26

Padgett, Benjamin R.

Compositions

Liquid crystal compositions

260155, 260156, 260164, 260178, 350349, C09K 334, G02F 113

Patent

active

041168615

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 stilbene-derivative dichroic dyes each having a vinylidene (--CH.dbd.CH--) group and a high order parameter. The dichroic liquid crystal compositions each provide a contrast ratio on the order of 10:1.

REFERENCES:
patent: 3703329 (1972-11-01), Castellano
patent: 3833287 (1974-09-01), Taylor et al.
patent: 3960751 (1976-06-01), Moriyama et al.
patent: 4032219 (1977-06-01), Constant et al.
Blinov, L. M., et al., J. Phys. (Paris), vol. 36, C-1, No. 3, pp. 69-76 (1975).
Constant, J., et al., "Pleochroic Dyes with High Order Parameters," presented at 6th Int. Liq. Cryst. Conf., Kent, Ohio (Aug. 27, 1976).
White, D. L., et al., J. Appl. Physics, vol. 45, No. 11, pp. 4718-4723 (1974).
Uchioa, T., et al., Mol. Cryst. Liq. Cryst. (Lett), pp. 153-158 (4/29/77).
Gray, G. W., et al., Liq. Cryst. & Plastic Cryst., vol. 1, J. Wiley & Sons, N.Y., pp. 110-111 (1974).
Bloom, A., et al., Mol. Cryst. Liq. Cryst. (Lett.), vol. 41, pp. 1-4 (1977).
Bloom, A., et al., Mol. Cryst. Liq. Cryst., vol. 40, pp. 213-221 (1977).

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