Patent ID: 8325167

Claim:
A display device comprising: a pixel comprising: a first transistor; a second transistor; a pixel electrode; a circuit that controls conduction between a gate electrode of the second transistor and a power source line; and a controlling element that controls conduction between the gate electrode of the second transistor and a second scanning line, wherein a gate electrode of the first transistor is electrically connected to a first scanning line, wherein one of a source electrode and a drain electrode of the first transistor is electrically connected to a signal line, wherein the other of the source electrode and the drain electrode of the first transistor is electrically connected to the gate electrode of the second transistor, wherein one of a source electrode and a drain electrode of the second transistor is electrically connected to the power source line, wherein the other of the source electrode and the drain electrode of the second transistor is electrically connected to the pixel electrode, wherein a conduction state or a non-conduction state in the circuit is selected depending on a potential of the pixel electrode and a potential of the first scanning line; wherein the controlling element is to be in a conduction state or a non-conduction state based on a potential of the second scanning line; and wherein a potential of the power source line and a potential of the second scanning line are held to turn off the second transistor.