Patent ID: 7184034

Claim:
A display device comprising a pixel that includes: a plurality of current source circuits to which a constant control current is supplied and which set a constant current corresponding to the control current as an output current; a plurality of switch portions for selecting an input of the output current to a light emitting element from each of the plurality of current source circuits according to a digital video signal; a current line to which the control current is inputted; and a current reference line, the plurality of current source circuits each including: a first transistor; a first means for keeping a gate voltage of the first transistor; a second means for selecting a connection between a gate and a drain of the first transistor; a third means for selecting a connection between the current line and one of a source and the drain of the first transistor and a connection between the current reference line and the other of the source and the drain of the first transistor; and a fourth means for setting a drain current of the first transistor as the output current.