Patent ID: 7969390

Claim:
A display device comprising: a plurality of data lines for supplying a data current; a plurality of scan lines for transmitting a selection signal; and a pixel portion comprising a plurality of pixel circuits connected to the plurality of data lines and the plurality of scan lines, each of the plurality of pixel circuits comprising: a display element configured to emit light at luminance corresponding to the data current; a transistor having a source electrode, a drain electrode, and a gate electrode, the transistor configured to supply the data current to the display element and; a first power supply line connected to the source electrode of the transistor; a second power supply line connected to the display element; a first capacitor configured to hold a voltage between the source electrode of the transistor and the gate electrode of the transistor; a first switch element configured to select a connection between the drain electrode of the transistor and the gate electrode of the transistor; a second switch element configured to select a connection between one of the plurality of data lines and the display element; a third switch element configured to select a connection between the transistor and the display element; and a fourth switch element configured to select a connection between the first capacitor and the display element, wherein the second switch element is directly electrically connected to both the transistor and a current source.