| 摘要 |
The present invention is directed to reduce the size of a liquid crystal driver (semiconductor integrated circuit for driving liquid crystal) having therein a D/A converting circuit, converting digital image data to analog gradation voltage, and outputting a voltage to be applied to a signal line (source line) of a color liquid crystal panel. Output amplifiers of the final stage for outputting an image signal converted to gradation voltage are divided into a plurality of groups. D/A converting circuits for converting image data to gradation voltage are provided as circuits common to the groups. While switching the group, the D/A converting circuit is operated in a time sharing manner. The output amplifiers in the final stage related to image signals of the same color are selected and grouped. A selector function is provided between the D/A converting circuit and the output amplifier, and an image signal converted to gradation voltage by the D/A converting circuit is supplied to a desired hold circuit.
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