Patent ID: 7977678

Claim:
A semiconductor display device comprising: an auxiliary power supply line; an interlayer insulating film over the auxiliary power supply line; a first power supply line over the interlayer insulating film, wherein the first power supply line is arranged perpendicular to the auxiliary power supply line; a second power supply line over the interlayer insulating film, wherein the second power supply line is arranged parallel to the first power supply line; an auxiliary wiring over the interlayer insulating film, wherein the auxiliary wiring is arranged parallel to the auxiliary power supply line; and a pixel electrode electrically connected to the first power supply line and the second power supply line, wherein the first power supply line is electrically connected to the auxiliary power supply line through a first contact hole formed in the interlayer insulating film, wherein the second power supply line is electrically connected to the auxiliary power supply line through a second contact hole formed in the interlayer insulating film, and wherein the auxiliary wiring is electrically connected to the auxiliary power supply line through a third contact hole formed in the interlayer insulating film.