Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1996-12-27
1999-07-20
Hjerpe, Richard A.
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 90, 345 89, 345205, G09G 336
Patent
active
059261609
ABSTRACT:
A plurality of pixel elements are arranged in a matrix layout, and an alternating current exciting signal having a plurality of exciting pulses is supplied to each pixel element. Each pixel element has a first MOS-FET in which one picture signal is received at a drain every one horizontal scanning period, one scanning signal is received at a gate every one frame period and a charge signal having a charge voltage relating to a picture voltage of the picture signal is output from a source, a second MOS-FET in which the alternating current exciting signal is received at a drain, the charge signal is received at a gate and a pixel electrode voltage of a pixel electrode signal relating to the charge voltage is output from a source, a condenser for maintaining the charge voltage of the charge signal until a next frame period, and a liquid crystal displaying device for emitting light according to the pixel electrode signal to display a pixel image. Because the pixel electrode voltage relates to the picture voltage, a brightness of the pixel image relates to the picture signal, so that an excellent displaying characteristic in gray scale. Also, a frequency of the pixel electrode signal is the same as that of the alternating current exciting signal, so that any flicker in an image composed of the pixel images can be prevented.
REFERENCES:
patent: 4532506 (1985-07-01), Kitazima et al.
patent: 5194974 (1993-03-01), Hamada et al.
Hjerpe Richard A.
Nguyen Francis N.
Victor Company of Japan Ltd.
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