Patent ID: 8344975

Claim:
A display device comprising: a plurality of scanning lines; a plurality of data lines; a plurality of pixels each provided at an intersection of one of the scanning lines and one of the data lines; and a power line for supplying current to the pixels, wherein each of the pixels includes: a light-emitting device which emits light according to a flow of a drive current corresponding to a data voltage supplied through one of the data lines; a drive transistor which is connected between the power line and the light-emitting device and which converts the data voltage into the drive current, according to a voltage applied to a gate electrode; a capacitor which has one electrode connected to the gate electrode of the drive transistor and which holds a voltage according to the data voltage; a first transistor having a gate electrode connected to one of the scanning lines and one of a source electrode and a drain electrode connected to the gate electrode of the drive transistor; a second transistor having a gate electrode connected to the one of the scanning line lines, one of a source electrode and a drain electrode connected to the other of the source electrode and the drain electrode of the first transistor, and the other of the source electrode and the drain electrode connected to the one of the data line lines; a third transistor having a gate electrode connected to the one of the source electrode and the drain electrode of the first transistor, a source electrode connected to the other of the source electrode and the drain electrode of the first transistor, and a drain electrode connected to a first potential line; and a fourth transistor having a gate electrode connected to a drain electrode, the drain electrode connected to the other of the source electrode and the drain electrode of the first transistor, and a source electrode connected to a second potential line, wherein: the fourth transistor is an n-type transistor, and the second potential line is a second power line having a potential, with respect to a reference potential, set to be equal to or lower than a lowest voltage held by the capacitor.