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.
