Method for driving display device

摘要

An object is to provide a convenient display device which consumes sufficiently small amount of power and a method for driving such a display device. The display device can be in an off state with a still image displayed in a still image display mode in which a pixel electrode and a common electrode which are for applying a voltage to the display element are brought into a floating state so that a voltage applied to the display element is held, and a still image is displayed without further supply of a potential. The display device is put to an off state with a desired image displayed in the still image display mode, whereby the display device can have a higher level of security and can be more convenient.

主权项

1. A method for driving a display device, comprising:
determining whether a mode of driving the display device is a moving image display mode or a still image display mode by a comparator circuit; displaying an image on a screen by supplying a power supply potential from a power source; writing an initialization image signal to the display device; displaying an initialization image on the screen in the still image display mode; stopping supply of the power supply potential with the initialization image displayed on the screen; driving a light source for a predetermined time after the step of stopping supply of the power supply potential; and stopping driving the light source and stopping displaying the initialization image at the same time, wherein supplying the power supply potential is controlled by a transistor comprising an oxide semiconductor in a channel formation region.