Patent ID: 8212750

Claim:
A display device comprising, in a pixel: a first wiring, a second wiring, a third wiring, and a fourth wiring; a light emitting element including a pixel electrode and a counter electrode; a capacitor element including two electrodes; a first transistor and a second transistor that control an input of a video signal; a third transistor that controls a current flowing in a forward direction to the light emitting element; and a fourth transistor that controls a current flowing in a reverse direction to the light emitting element, wherein gates of the first transistor and the second transistor are electrically connected to the first wiring; one of a source and a drain of the first transistor is electrically connected to the second wiring in which the video signal is transmitted, and the other one is electrically connected to the pixel electrode; one of a source and a drain of the second transistor is electrically connected to the third wiring, and the other one is electrically connected to a gate of the third transistor and to one of the electrodes of the capacitor element; one of a source and a drain of the third transistor is electrically connected to the third wiring, and the other one is electrically connected to the pixel electrode and to the other one of the electrodes of the capacitor element; one of a source and a drain of the fourth transistor is electrically connected to the fourth wiring, and the other one is electrically connected to the pixel electrode and to a gate of the fourth transistor; and each of the first transistor, the second transistor, the third transistor, and the fourth transistor is an N-channel transistor.