Patent ID: 7989815

Claim:
A display device comprising: a scan line; a common wiring; a pixel portion comprising a pixel electrode and a thin film transistor, the thin film transistor including a first oxide semiconductor film; and a first non-linear element comprising: a first gate electrode connected to the scan line; a first gate insulating film over the first gate electrode; a first wiring layer over the first gate insulating film; a second wiring layer over the first gate insulating film; and a second oxide semiconductor film above and in contact with the first gate insulating film, the first wiring layer, and the second wiring layer, wherein the first gate electrode is electrically connected to the scan line, wherein the first gate electrode and the scan line are formed of the same material, wherein the first wiring layer is electrically connected to the common wiring, wherein the first wiring layer and the common wiring are formed of the same material, and wherein the second wiring layer is directly connected to the scan line.