| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid crystal driving device in which current consumption in a constant current circuit of an operational amplifier is halved by reducing the number of operational amplifiers constituting an output buffer into one amplifier per two outputs. SOLUTION: Since a video signal is alternately sample-held for every horizonl period into each system of a sample-hold circuit 12 whose one output consists of two systems and two outputs are alternately outputted via an output buffer 13 having a single operational amplifier per two outputs of video signal sample- held by the other system at the 1st half and 2nd half of one horizontal period when one system is sample-holding, an output operation time to a data line can overlap the sample-hold operation time to leave a margin, and also the current consumption is reduced more than that of a conventional driving device by providing a single operational amplifier for every two data lines.
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