Active matrix display

Abstract

An active matrix display capable of reducing power consumption and preventing an operation failure when switching the operation of a level shifter is obtained. In this active matrix display, a level shifter operating in a time-divisional manner is formed by a level conversion circuit converting a signal voltage level, a control circuit generating a control signal deciding an operating period of the level shifter and a switching circuit supplying a power supply voltage to the level conversion circuit in response to the control signal. Thus, the operating period of the level shifter is readily controlled, for stopping operation of an unnecessary circuit part. Consequently, power consumption can be reduced. When the control circuit generating the control signal deciding the operating period of the level shifter is employed for overlapping operating periods of adjacent level shifters, an operation failure such as an inoperable state of a next-stage latch circuit resulting from delay or the like is prevented when switching the operation of the level shifter.