Patent ID: 7511687

Claim:
A display device including pixels each having plural current source circuits to each of which a constant control current is supplied and in each of which a constant current corresponding to the control current is made into an output current, and plural switch parts each selecting an input of the output current from each of the plural current source circuits to a light emitting element by a digital picture signal, wherein the plural current source circuits are provided in each of the pixels, and wherein each of the plural current source circuits comprises: a first transistor and a second transistor connected in series with the first transistor, first means for selectively inputting the control current as a drain current of the first transistor, second means for holding a gate voltage of the first transistor, third means for selecting a connection between a gate and a drain of the first transistor, and fourth means for making a drain current of the second transistor, in which a part of the held gate voltage of the first transistor is made into a gate voltage, into the output current.