Patent ID: 8704267

Claim:
A light-emitting display device comprising: a first gate electrode and a second gate electrode; a gate insulating film over the first gate electrode and the second gate electrode, wherein the gate insulating film has a contact hole over the second gate electrode; a first oxide semiconductor film over the first gate electrode with the gate insulating film interposed therebetween; a first electrode and a second electrode on and in direct contact with the first oxide semiconductor film, wherein the second electrode is on and in direct contact with the second gate electrode through the contact hole; a second oxide semiconductor film over the second gate electrode with the gate insulating film interposed therebetween; a third electrode electrically connected to the second oxide semiconductor film; a protective film over and in contact with the first electrode, the second electrode, the third electrode, the first oxide semiconductor film, and the second oxide semiconductor film; a light-emitting layer on and in direct contact with the second oxide semiconductor film; and a fourth electrode over the light-emitting layer.