| abstract |
In the case where the still image is displayed in the pixel portion having the pixel, for example, the driving circuit which controls the writing of the image signal having the image data to the pixel portion is stopped by stopping the supply of the power supply voltage to the driving circuit. Writing of the video signal to the pixel portion is stopped. After the driving circuit is stopped, the supply of the power supply voltage to the panel control device for controlling the operation of the driving circuit and the image memory storing the image data is stopped, and the panel control device, the image memory, and the semiconductor display device The supply of the power supply voltage to the CPU which collectively controls the operation of the power supply control device that controls the supply of the supply voltage to the circuit is stopped. |