Patent ID: 8624802

Claim:
A display device comprising: a pixel portion formed over a substrate, the pixel portion comprising a pixel; a first shift register formed over the substrate; and a second shift register formed over the substrate, the second shift register being between the pixel portion and the first shift register, wherein the pixel comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a capacitor and a light emitting element, wherein one of a source and a drain of the first transistor is directly connected to a first line, wherein the other of the source and the drain of the first transistor is directly connected to one of a source and a drain of the second transistor, wherein the other of the source and the drain of the second transistor is directly connected to a second line, wherein one of a source and a drain of the third transistor is directly connected to the other of the source and the drain of the first transistor, wherein the other of the source and the drain of the third transistor is electrically connected to the light emitting element, wherein a gate of the third transistor is directly connected to one of a source and a drain of the fourth transistor, wherein a gate of the second transistor is directly connected to the gate of the third transistor, wherein a first terminal of the capacitor is directly connected to the gate of the third transistor, and wherein a gate of the fourth transistor is directly connected to a third line.