| 摘要 |
PROBLEM TO BE SOLVED: To provide a drive unit of a liquid crystal display device, the drive unit responding to a full-color or eight-color mode and capable of significantly reducing current consumption in a simple configuration. SOLUTION: The drive unit for a grayscale voltage to be supplied to a source bus SB is equipped with: a first drive section for a full-color mode including a reference voltage generator 110 generating a voltage value that determines a rough range of the gradation voltage, a first DAC (digital analog converter) 120, a second DAC 130, and a demultiplexer 160 supplying output of the second DAC to the source bus; a second drive section 200 for 8-color mode including a switch SW11 connecting a capacitor to a power supply or the ground; and second, third, fourth switches SW1, SW2 and SW3 operating to stop supplying a power to the reference voltage generator, the first DAC and the second DAC, respectively, in the eight-color mode. COPYRIGHT: (C)2009,JPO&INPIT
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