Electro-optical display device with sub-electrodes

Details Electro-optical display device with sub-electrodes Electro-optical display device with sub-electrodes

1992-11-12

1994-09-13

Ben, Loha

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359245, 359320, 359 87, 345 55, 345 89, G02F 103, G02F 11343

Patent

active

053473930

ABSTRACT:
In a bistable switching display device the occurrence of artefacts due to considerable changes of periodicity between successive grey scale stages is reduced by a suitable subdivision of the electrodes (112). To this end a drive unit (116) allocates fewer than 2.sup.n grey scale stages to each pixel (113) which is subdivided into n sub-pixels (113.sup.a, 113.sup.b, 113.sup.c). The change of periodicity will decrease when a suitable division of the surface ratios and drive sequence are chosen.

REFERENCES:
patent: 3940201 (1976-02-01), Micheron et al.
patent: 4791417 (1988-12-01), Bobak
patent: 4808991 (1989-02-01), Tachiuchi et al.
patent: 5146213 (1992-09-01), Brunel et al.

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