A pixel drive circuit includes a drain voltage increase limiter circuit
composed of a TFT device provided between a node and the drain of a TFT
device serving as a current source, a capacitor and a switch. In a data
write mode, switches are turned on to allow drive current to flow from a
data line to the TFT devices. Then, respective gate voltages of the TFT
devices are held in respective capacitors. In a display mode, only a
switch is turned on to form a current path from a supply voltage to the
TFT devices through a light-emitting diode. The voltage on a node is held
constant regardless of channel modulation. Accordingly, desired electric
current flows through the light-emitting diode.