| 摘要 |
PROBLEM TO BE SOLVED: To reduce power consumption of an active matrix type display device. SOLUTION: A holding circuit 110 for holding a video signal every pixel is arranged, and a normal operation mode and a memory operation mode are switched to each other for displaying. In the memory operation mode, an output of a booster circuit 200 arranged in a panel is used as a reference voltage of the holding circuit, and also a selection circuit is changed over. The power consumption is reduced by halting the operation of a booster circuit of an external circuit board and a driver circuit in the panel. In the normal operation mode, the booster circuit 200 is halted.
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