Display control method having partial rewriting operation

Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix

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345 97, G09G 336

Patent

active

052891739

ABSTRACT:
An interlaced scanning, in which every adjoining plural scanning electrodes are rewritten at the rate of one scanning electrode and all of the picture elements are rewritten in plural fields, is conducted at a constant period. Furthermore, during the transcribing operation of the picture elements, a partial rewriting operation is performed wherein a selective voltage is applied to the scanning electrode where data to be displayed on the picture elements of liquid crystal display device has changed, and a signal voltage is applied to the signal electrode responsive to, whether the picture elements on the selected scanning electrode should be changed from a bright display state to a dark display state, or from the dark display state to the bright display state, or the bright and dark display states are not changed. By bringing the field frequency of the transcribing operation above 30 Hz, even when the sixteen adjoining scanning electrodes are rewritten at the rate of one scanning electrode, the display with little flickers can be accomplished.

REFERENCES:
patent: 4693563 (1987-09-01), Harada et al.
patent: 4717957 (1988-01-01), Santamaki et al.

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