PURPOSE: To reduce the power consumption of the liquid crystal display device by providing a static memory circuit at the pixel part of the liquid crystal display device.

CONSTITUTION: When a voltage pulse is applied to a gate line 4 and a transistor(TR) 22 turns ON, an image signal from a source line 3 is charged in liquid crystal 18 and the gate of a TR 21-1. When the image signal is an ON voltage, the liquid crystal 18 is applied with an electric field and changes in orientation state; and the TR 21-1 turns ON and a TR 21-2 turns OFF. When the voltage of the gate line 4 becomes an OFF voltage, the TR 22 turns OFF, but the liquid crystal 18 is charged through the TR 20-2, so its orientation state does not change. Thus, the image signal can be supplied to liquid crystal cells so that the same still picture can continuously be displayed on the screen.