| 摘要 |
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.
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