| abstract |
As the resolution of the display device increases, the number of pixels, the number of gate lines, and the number of signal lines increase. When the number of gate lines and signal lines increases, it is difficult to mount an IC chip including a driving circuit for driving the gate line and the signal line by bonding or the like, so that there is a problem that the manufacturing cost increases. A driving circuit for driving the pixel portion and the pixel portion is disposed on the same substrate, and at least a part of the driving circuit includes a thin film transistor using the oxide semiconductor in which a gate electrode is disposed below and above the oxide semiconductor. Therefore, if the pixel portion and the driving portion are provided on the same substrate, manufacturing cost can be reduced. |