Patent ID: 8017944

Claim:
An electronic device comprising: a driving portion comprising a first transistor and a second transistor; and a pixel region comprising a plurality of pixels, each pixel comprising: a switching transistor comprising a semiconductor layer having a source region, a drain region and at least one channel-forming region provided therebetween, a gate insulating film over the semiconductor layer and a gate electrode over the gate insulating film; a first insulating film over and in contact with the gate electrode and including a first opening portion and a second opening portion; a wiring over the first insulating film and overlapping with the at least one channel-forming region; a first connection electrode over and in contact with the first insulating film, and in contact with one of the source region and the drain region of the switching transistor through the first opening portion; a second insulating film over the wiring and the first connection electrode and including a third opening portion; a first electrode over and in contact with the first insulating film; a light emitting layer over the first electrode; a second electrode over the light emitting layer; a protective electrode over and in contact with the second electrode; and a passivation film over and in contact with the protective electrode, wherein the third opening portion has a tapered side wall, wherein the light emitting layer covers the tapered side wall, wherein the first transistor, the second transistor, and the switching transistor are overlapped with the protective electrode, and wherein a second connection electrode is provided over and in contact with the first insulating film, and in contact with one of a source and a drain of each of the first transistor and the second transistor through the second opening portion.