Patent
1987-05-27
1988-08-09
Miller, Stanley D.
350333, G02F 113
Patent
active
047624000
ABSTRACT:
A ferroelectric liquid crystal electro-optical device driven in time-sharing comprising; a ferroelectric liquid crystal layer having bi-stable alignment characteristics, means for converting the bi-stable alignment state to optical ON state or optical OFF state, a matrix electrode and means for driving the liquid crystal layer by applying voltages to the liquid crystal layer through the matrix electrode. A voltage sufficient to change a stable alignment state of the ferro-electric liquid crystal molecular is applied to a selected pixel, a voltage insufficient to change a stable alignment state is applied to a non-selected pixel and an AC voltage for holding a stable alignment state is applied to a half-selected pixel. A bias value, which is the ratio of the amplitude of the voltage applied to the selected pixel to the amplitude of the AC voltage applied to the half-selected pixel, is set near the maximum value of B satisfying the following formula
REFERENCES:
patent: 4508429 (1985-04-01), Nagae et al.
patent: 4548476 (1985-10-01), Kaneko
patent: 4655561 (1987-04-01), Kanbe et al.
patent: 4668051 (1987-05-01), Mourey et al.
patent: 4707078 (1987-11-01), Geary
Harada Takamasa
Ito Kokichi
Shimoda Sadashi
Taguchi Masaaki
Adams Bruce L.
Gallivan Richard
Miller Stanley D.
Seiko Instruments Inc.
Wilks Van C.
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