Static information storage and retrieval – Radiant energy – Liquid crystal
Patent
1990-03-20
1991-01-08
Fears, Terrell W.
Static information storage and retrieval
Radiant energy
Liquid crystal
365106, 365117, G11C 1142, G11C 1304
Patent
active
049841980
ABSTRACT:
The disclosed liquid crystal electrooptic memory device uses a ferroelectric liquid crystal sandwiched by a pair of molecular oriented films attached to opposite surfaces thereof, and a pair of transparent conductive films are attached to the outside surfaces of the molecular oriented films, respectively. An impedance having a constant electrostatic capacitance and a variable resistance is connected to one of the transparent conductive films. Further, an electric pulse source is connected across the transparent conductive films through the impedance. When a pulse from the pulse source is applied to the transparent conductive films, light transmittance of the ferroelectric liquid crystal is set at different levels depending on the resistance of the impedance. Thus, the resistance of the impedance is memorized in the form of the light transmittance of the ferroelectric liquid crystal. The impedance can be in the form of a photoconductive film attached to the molecular oriented film.
REFERENCES:
patent: 4733370 (1988-03-01), Kitajima
"Electrooptic Bistability . . . "; Japanese Journal of Applied Physics; vol. 28, No. 1; Jan. 1989; (L116-L118).
"Electrooptic Bistability . . . "; Japanese Journal of Applied Physics; vol. 27, No. 4; Apr. 1988; (L475-L476).
"Submicrosecond Bistable Electro-Optic . . . ", (pp. 899-901), Applied Phys Letters, 1 Jun. 1980.
Ikeno Hidenori
Kobayashi Shunsuke
Maeda Hiroki
Yoshida Masaaki
Zhang Bai Y.
Fears Terrell W.
Tokyo University of Agriculture and Technology
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