Patent ID: 7742024

Claim:
A display device comprising: a signal line; a power source; a power supply line; a first wiring; a second wiring; a third wiring; a first pixel comprising a first transistor, a second transistor, and a first light emitting element; and a second pixel comprising a third transistor, a fourth transistor, and a second light emitting element, wherein a first region of a gate of the first transistor is electrically connected to the power source through the first wiring, wherein a second region of the gate of the first transistor is electrically connected to a first region of a gate electrode of the third transistor through the second wiring, wherein a second region of the gate of the third transistor is electrically connected to the third wiring, wherein one of a source and a drain of the first transistor is electrically connected to the first light emitting element and the other of the source and the drain of the first transistor is electrically connected to one of a source and a drain of the second transistor, wherein one of a source and a drain of the third transistor is electrically connected to the second light emitting element and the other of the source and the drain of the third transistor is electrically connected to one of a source and a drain of the fourth transistor, wherein the other of the source and the drain of the second transistor is electrically connected to the power supply line and a gate of the second transistor is electrically connectable to the signal line, and wherein the other of the source and the drain of the fourth transistor is electrically connected to the power supply line and a gate of the fourth transistor is electrically connectable to the signal line.