Patent ID: 7646364

Claim:
A pixel circuit which is disposed in a place where a signal line through which a signal current is caused to flow, and scanning lines through which control signals are supplied, respectively, cross each other and which includes an electroluminescence element, a drive transistor for supplying a drive current to the electroluminescence element, and a control portion adapted to operate in accordance with the control signals for controlling the drive current of said drive transistor based on the signal current, said control portion comprising: first sampling means for sampling the signal current being caused to flow through said signal line; second sampling means for sampling a predetermined reference current being caused to flow through said signal line just before or after the signal current; and difference means for generating a control voltage corresponding to a difference between the sampled signal current and the sampled reference current, wherein said drive transistor receives the control voltage at its gate and supplies a drive current being caused to flow through its source and drain to said electroluminescence element to make said electroluminescence element emit light.