| 摘要 |
PURPOSE:To simplify circuit constitution and to miniaturize the above circuit by providing 1st and 2nd switched capacitor circuits and inverting 1st, and 2nd voltage sources to generate liquid crystal-driving voltages. CONSTITUTION:This circuit is constituted by providing the 1st and 2nd reference voltage sources, generating the liquid crystal-driving voltages of the same polarity and different levels and inputting the output voltages of the 1st and 2nd voltage sources to the switched capacitor circuits 13, 14 to generate the liquid crystal-driving voltages inverted in the polarity. The 1st to 4th liquid crystal- driving voltages can be generated by using the liquid crystal-driving voltage E of the one positive or negative polarity in this way; in addition, the number of amplifiers is decreased to simplify circuit constitution, by which the circuit is miniaturized.
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