Method of driving an optical modulation device

Details Method of driving an optical modulation device Method of driving an optical modulation device

1987-12-09

1990-02-13

Moore, David K.

Communications: electrical

Continuously variable indicating

With meter reading

340783, 340784, 350350S, G09G 334

Patent

active

049010662

ABSTRACT:
In a method of driving an optical modulation device via scanning lines and signal lines a "selection period" of each scanning line is divided into at least four division periods. A voltage applied to a pixel allows the pixel to become a first stable state of bistable states of the pixel during third and second division periods from the last division period, and to either become a second stable state of the bistable states or hold the first state during the last division period. The scanning lines are scanned sequentially while at least two sequential scanning lines thereof may be applied with a same selection voltage at the same time, thereby reducing a time required for rewriting all pixels.

REFERENCES:
patent: 4697887 (1987-10-01), Okada et al.
patent: 4715688 (1987-12-01), Harada et al.
patent: 4773716 (1988-09-01), Nakanowatari
patent: 4800382 (1989-01-01), Okada et al.
SID 85 Digest (1985), pp. 131-134, "An Application of Chiral Smectic-C Liquid Crystal to a Multiplexed Large-Area Display", by T. Harada et al.
"Simple Matrix LCD using Convolution Scanning Method", Hiroaki IDENO, EID 86-22 (1986), pp. 25-28.

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