Patent ID: 8907335

Claim:
A display device comprising: a pixel portion comprising a first thin film transistor comprising a first oxide semiconductor layer; a driver circuit comprising a second thin film transistor comprising a second oxide semiconductor layer and a third thin film transistor comprising a third oxide semiconductor layer, the second thin film transistor comprising a gate electrode below the second oxide semiconductor layer with an insulating layer therebetween; and a terminal portion comprising a transparent conductive film, a terminal and a floating electrode, and a first wiring over the insulating layer, wherein the transparent conductive film is electrically connected to a source wiring through the terminal, wherein the floating electrode comprises a same material as the gate electrode, wherein the terminal and the floating electrode overlap with each other, wherein an entirety of the second oxide semiconductor layer overlaps the gate electrode, wherein the second oxide semiconductor layer is electrically connected to the third oxide semiconductor layer, wherein the first wiring is directly connected to the gate electrode of the second thin film transistor, and wherein the third oxide semiconductor layer is directly connected to the first wiring.