Patent ID: 8450743

Claim:
A display device comprising: an active matrix region; and a peripheral circuit comprising at least two thin film transistors formed over a substrate, the at least two thin film transistors comprising: two channel-forming regions in one common active layer, wherein the two channel-forming regions contain nickel, and the one common active layer is aligned along a channel length direction of each of the two channel-forming regions; a common gate wiring adjacent to the one common active layer; a common source wiring electrically connected to the one common active layer; and a common drain wiring electrically connected to the one common active layer, wherein the at least two thin film transistors are electrically connected in parallel with each other through the common gate wiring, the common source wiring and the common drain wiring, wherein the common gate wiring includes branched portions, and wherein each of the branched portions overlaps one of the two channel-forming regions.