Liquid crystalline composition having mixed cholesteric-nematic

Details Liquid crystalline composition having mixed cholesteric-nematic Liquid crystalline composition having mixed cholesteric-nematic

1975-11-20

1977-01-25

Padgett, Benjamin R.

Compositions

Liquid crystal compositions

350160LC, C09K 334, G02F 113

Patent

active

040050327

ABSTRACT:
A system which transforms a liquid crystal composition having a mixture of cholesteric liquid crystal or other optically active materials and nematic liquid crystal materials from an electrically induced dynamic scattering state into an aligned nematic state by changing variables of an applied electrical field, and an imaging system wherein such a liquid crystal member is imaged in a desired image configuration by such an electrical field-induced transition system. Such systems exhibit high optical contrast and may be viewed without the aid of light polarizing devices.

REFERENCES:
patent: 3540796 (1970-11-01), Goldmacher et al.
patent: 3642348 (1972-02-01), Wysocki et al.
patent: 3652148 (1972-03-01), Wysocki et al.
patent: 3680950 (1972-08-01), Haas et al.
patent: 3703331 (1972-11-01), Goldmacher
patent: 3704056 (1972-11-01), Wysocki et al.
patent: 3779751 (1973-12-01), Haas et al.
patent: 3803050 (1974-04-01), Haas et al.
patent: 3806230 (1974-04-01), Haas
patent: 3872140 (1975-03-01), Klanderman et al.
patent: 3931041 (1976-01-01), Saeva et al.

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