Patent ID: 8599109

Claim:
A display device comprising: a light emitting element; a capacitor; a first transistor; a second transistor; a third transistor; and a fourth transistor, wherein a gate of the first transistor is electrically connected to one electrode of the capacitor, wherein one of a source and a drain of the first transistor is electrically connected to the other electrode of the capacitor, wherein the one of the source and the drain of the first transistor is electrically connected to the light emitting element, wherein one of a source and a drain of the second transistor is electrically connected to the gate of the first transistor, wherein the other of the source and the drain of the second transistor is electrically connected to a first line, wherein one of a source and a drain of the third transistor is electrically connected to the other of the source and the drain of the first transistor, and wherein one of a source and a drain of the fourth transistor is electrically connected to the other of the source and the drain of the first transistor.