Thermal method for controlling the optical properties of a liqui

Details Thermal method for controlling the optical properties of a liqui Thermal method for controlling the optical properties of a liqui

1975-12-22

1977-06-21

Trafton, David L.

Communications: electrical

Systems

Portable self-contained

250331, 350160LC, G02F 113

Patent

active

040315290

ABSTRACT:
In a liquid crystal whose molecules have temperature-dependent dielectric anisotropy within a range such that the liquid crystal retains the same phase, the optical properties of a liquid crystal film are controlled by applying an electric field of predetermined frequency to the film and by bringing the temperature of the film to a value within the range mentioned. The dielectric anisotropy then assumes a predetermined value in respect of said frequency and the liquid crystal film assumes a predetermined optical state.

REFERENCES:
patent: 3650608 (1972-03-01), Baker
patent: 3711713 (1973-01-01), Wysocki et al.
patent: 3796999 (1974-03-01), Kahn
patent: 3829684 (1974-08-01), Assouline et al.
patent: 3857629 (1974-12-01), Freiser
patent: 3921162 (1975-11-01), Fukai et al.
patent: 3956169 (1976-05-01), Nakano et al.

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