Patent ID: 7248237

Claim:
A display device comprising: a plurality of scanning lines arranged in a plurality of rows; a plurality of signal lines arranged in a plurality of columns; a scanning driver which sequentially supplies to the scanning lines selection signals that respectively select the scanning lines; a data driver which supplies a designation current to said plurality of signal lines within a selection period when one of the scanning lines is being selected; a plurality of pixel circuits which are arranged in a plurality of rows and a plurality of columns, and each of which supplies a driving current corresponding to a current value of the designation current that flows to the signal lines; a plurality of optical elements which emit light in accordance with the driving current supplied by said plurality of pixel circuits; and a power supply which selectively outputs a designation current reference voltage to said plurality of pixel circuits in the plurality of rows within the selection period and outputs to said plurality of pixel circuits in the plurality of rows a driving current reference voltage to supply the driving current within a non-selection period; wherein the optical elements have respective first electrodes connected to the power supply through the pixel circuits and a second electrode to which a reference voltage is applied; and wherein the power supply selectively outputs the driving current reference voltage and the designation current reference voltage to supply the designation current, and the driving current reference voltage is not less than the reference voltage applied to the second electrode of the optical element, and the designation current reference voltage is not more than the reference voltage applied to the second electrode of the optical element.