Patent ID: 8786588
Filing Date: 2014-07-22
Classification: G06F,G09G,Y02D

Abstract:
1. A method for driving a display device comprising a driver circuit portion and a pixel portion comprising n (n is a natural number) pixels, the driver circuit portion comprising a first driver circuit and a second driver circuit, wherein each of the n pixels comprises a transistor, and wherein a channel formation region of the transistor comprises an oxide semiconductor layer, comprising the step of: performing operation N (N is a natural number) times in a still image display mode for displaying a still image in the pixel portion, the operation comprising: wherein in the case where N is greater than or equal to 2, a K-th (K is a natural number greater than or equal to 2 and less than or equal to N) period of stopping supply of the second driving signal and the second power supply voltage to the second driver circuit is set longer than a (K−1)-th period of stopping supply of the second driving signal and the second power supply voltage to the second driver circuit.