Patent ID: 8059068

Claim:
A semiconductor device comprising: a first gate signal line; a second gate signal line; a first line; a second line; a third line; a first transistor; a second transistor; a third transistor; a fourth transistor; and a capacitor, wherein a gate of the first transistor is electrically connected to the first gate signal line, wherein a first terminal of the first transistor is electrically connected to the first line, wherein a gate of the second transistor is electrically connected to a second terminal of the first transistor, wherein a first terminal of the second transistor is electrically connected to a first terminal of the third transistor, wherein a first terminal of the capacitor is electrically connected to the gate of the second transistor, wherein a second terminal of the capacitor is electrically connected to a second terminal of the second transistor, wherein a second terminal of the third transistor is electrically connected to the second line, wherein a gate of the third transistor is electrically connected to the second gate signal line, wherein a first terminal of the fourth transistor is electrically connected to the third line, and wherein a second terminal of the fourth transistor is electrically connected to the second terminal of the second transistor.