Image signal control circuit which controls image signal for dis

Details Image signal control circuit which controls image signal for dis Image signal control circuit which controls image signal for dis

1997-02-13

2000-10-31

Saras, Steven J.

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 96, G09G 336

Patent

active

061409898

ABSTRACT:
An image signal control circuit including a digital-to-analog conversion circuit with a first reference voltage terminal to be supplied with a predetermined voltage value, and second and third reference voltage terminals to be supplied with gradation voltage values The digital-to-analog conversion circuit also has a switching unit for outputting one value of gradated analog gradation data obtained by the division of the gradation voltage, a control circuit for selectively operating the switching unit based on digital image data, sample hold input clock and frame input clock, so as to switch the polarity of an output signal of the digital-to-analog conversion circuit at every frame period.

REFERENCES:
patent: 3823396 (1974-07-01), Lode
patent: 5097342 (1992-03-01), Agano
patent: 5168270 (1992-12-01), Masumoni et al.
patent: 5283580 (1994-02-01), Brooks et al.
patent: 5287092 (1994-02-01), Shiraishi
patent: 5508702 (1996-04-01), Estrada et al.
patent: 5650784 (1997-07-01), Hikosaka et al.

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