LIQUID CRYSTAL DISPLAY DEVICE, METHOD FOR DRIVING THE SAME, AND ELECTRONIC DEVICE INCLUDING THE SAME

摘要

PROBLEM TO BE SOLVED: To reduce the power consumption of a liquid crystal display device, capable of attenuating the off current of a thin film transistor and displaying moving images and still images.

SOLUTION: The liquid crystal display device includes: a pixel portion including a plurality of pixels to which image signals are supplied; a driver circuit including a signal line driver circuit which selectively controls a signal line and a gate line driver circuit which selectively controls a gate line; a memory circuit which stores the image signals; a comparison circuit which compares, for each pixel, the image signals stored in the memory circuit in the pixels and detects a difference; and a display control circuit which controls the driver circuit and reads the image signal in accordance with the difference. The display control circuit supplies the image signal only to the pixel where the difference is detected. The pixel includes a thin film transistor. A gate of the thin film transistor is electrically connected to the gate line; a first terminal of the thin film transistor is electrically connected to the signal line; and a second terminal of the thin film transistor is electrically connected to a pixel electrode. The thin film transistor includes a semiconductor layer including an oxide semiconductor.

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