Patent ID: 8237186

Claim:
A semiconductor device comprising: a pixel comprising: a light emitting element; a capacitor; a first transistor having a gate electrically connected to a first wiring, one of a source and a drain electrically connected to a third wiring, and the other of the source and the drain electrically connected to the capacitor; and a second transistor having a gate electrically connected to the capacitor, one of a source and a drain electrically connected to a second wiring, and the other of the source and the drain electrically connected to the light emitting element, wherein the first transistor and the second transistor have a same conductivity type, wherein the one of the source and the drain of the first transistor is electrically connected to the third wiring by a fourth wiring, wherein the fourth wiring and the first wiring are formed on a same layer, and wherein the second wiring and the third wiring overlap partially with each other.