Driver of liquid crystal display

Details Driver of liquid crystal display Driver of liquid crystal display

1997-07-09

2000-07-18

Saras, Steven J.

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345100, G09G 336

Patent

active

060913908

ABSTRACT:
A driver of an LCD having a plurality of channels includes a counter for counting a signal having a predetermined level; a DAC for sequentially increasing or decreasing one level of a plurality of input voltage levels when the counter counts; a plurality of comparators for comparing its input data with the output of the counter, a comparator being formed for each channel; a plurality of level shifters for compensating for the level difference between the DAC and relevant comparator; and a plurality of sample/hold portions for sampling a current output from the DAC according to the output signal of the level shifter, and for holding the sampled value when the counter counts.

REFERENCES:
patent: 5196738 (1993-03-01), Takahara et al.
patent: 5252956 (1993-10-01), Senn et al.
patent: 5510748 (1996-04-01), Erhart et al.
patent: 5708453 (1998-01-01), Tsuchida et al.
patent: 5726676 (1998-03-01), Callahan, Jr. et al.

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