Driving method for liquid crystal device

Details Driving method for liquid crystal device Driving method for liquid crystal device

1986-08-01

1988-04-19

Miller, Stanley D.

350339R, 350332, G02F 113

Patent

active

047385154

ABSTRACT:
A driving method for a liquid crystal device of the type comprising arranged picture elements each comprising oppositely spaced electrodes, and a ferroelectric liquid crystal layer and a dielectric layer disposed between the electrodes, the ferroelectric liquid crystal layer having a resistance R(.OMEGA.) and a capacitance C.sub.1 (F), the dielectric layer having a capacitance C.sub.2 (F); wherein a driving voltage having a pulse duration .DELTA.T(sec) set to satisfy the following formula (1) is applied to the picture elements: ##EQU1## wherein a is a coefficient satisfying the relationship of a<.vertline.-Va.vertline./.vertline.V.sub.ON .vertline., V.sub.ON is a value of voltage (volt) applied to a picture element at the time of writing, -Va is a value of voltage (volt) of a reverse polarity applied to the picture element after the application of the writing voltage V.sub.ON, b is a coefficient defined by the equation of b=.vertline.V.sub.1 .vertline./.vertline.V.sub.ON .vertline., and V.sub.1 is the inversion initiation voltage (volts) of the liquid crystal layer.

REFERENCES:
patent: 4367924 (1983-01-01), Clark et al.
patent: 4388375 (1983-06-01), Hopper et al.
patent: 4411496 (1983-10-01), Nonomura et al.

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