Patent ID: 8319215
Filing Date: 2012-11-27
Classification: G02F,H01L

Abstract:
1. A display device comprising: a pixel portion at least comprising a first thin film transistor including a first oxide semiconductor layer and a first gate electrode; and a driver circuit at least comprising a second thin film transistor including a second oxide semiconductor layer and a second gate electrode, and a third thin film transistor including a third oxide semiconductor layer and a third gate electrode, wherein a length of the second oxide semiconductor layer in a channel length direction is smaller than a length of the second gate electrode in a channel length direction, wherein a length of the third oxide semiconductor layer in a channel length direction is larger than a length of the third gate electrode in a channel length direction, wherein a wiring in direct contact with the second gate electrode is provided above the third oxide semiconductor layer, and wherein the wiring is a source wiring or a drain wiring of the third thin film transistor electrically connected to the third oxide semiconductor layer.