| abstract |
A semiconductor display device capable of reducing power consumption is proposed. A pixel unit having pixels, a drive circuit that controls writing of an image signal having image information to the pixel unit, a panel controller that controls the operation of the drive circuit, an image memory in which image information is stored, And a power supply controller that controls supply of power supply voltage to various circuits in the semiconductor display device, and a panel controller, an image memory, and a CPU that comprehensively controls operations of the power supply controller. Then, when displaying a still image in the pixel portion, the supply of the power supply voltage to the drive circuit is stopped to stop the drive circuit, and writing of the image signal to the pixel portion is stopped. Further, after the driving circuit is stopped, the supply of the power supply voltage to the panel controller and the image memory is stopped, and the supply of the power supply voltage to the CPU is stopped. [Selection] Figure 1 |