Patent ID: 7417606

Claim:
A display apparatus comprising: a plurality of pixel circuits; a plurality of light-emitting elements each of which is arranged for a corresponding one of the pixel circuits and emits light at a luminance corresponding to a driving current; luminance gray level designation means for supplying, through a signal line to a respective one of the pixel circuits, a gray level designation current having a current value larger than that of the driving current during a selection period to store a luminance gray level of the light-emitting element in the pixel circuit; and current value switching voltage output means for outputting a first voltage to the pixel circuit to cause the luminance gray level designation means to supply the gray level designation current through the signal line to the pixel circuit during the selection period, and for outputting a second voltage having a potential different from that of the first voltage to the pixel circuit during a nonselection period, thereby modulating a current output from the pixel circuit based on the luminance gray level stored in the pixel circuit to supply the driving current to the pixel circuit.