Each pixel of a display includes a first thin film transistor whose source
is connected to a first power supply terminal, a second thin film
transistor which is different in conduction type from the first thin film
transistor and whose source and drain are connected to the drain of the
first thin film transistor and the first power supply terminal,
respectively, an output control switch, and a display element connected
in series with the output control switch between a second power supply
terminal and the drain of the first thin film transistor.