Patent ID: 8358063

Claim:
A display device comprising: a pixel portion comprising a pixel comprising: a first transistor; a second transistor electrically connected to the first transistor; and a light emitting element electrically connected to the second transistor; a first gate side driving circuit at a first side of the pixel portion; a second gate side driving circuit at a second side of the pixel portion; and wherein a gate electrode of the first transistor comprises a material which is different from a material of a gate wiring line, wherein an electrode of the light emitting element is electrically connected to one of a source wiring and a drain wiring of the second transistor through a first contact hole, wherein the one of the source wiring and the drain wiring of the second transistor is electrically connected to a semiconductor film of the second transistor through a second contact hole, wherein the first contact hole and the second contact hole do not overlap with each other, wherein a silicon nitride layer is positioned over the light emitting element, wherein a current flows through the first transistor in a first direction, wherein a current flows through the second transistor in a second direction, wherein the first direction intersects with the second direction, and wherein the display device does not comprise a circular polarizing film.