| 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 the number of signal lines increases, it is difficult to mount an IC chip including a driving circuit for driving the gate lines and signal lines by bonding or the like, and there is a problem in that manufacturing cost increases. A pixel portion and a driving circuit for driving the pixel portion are disposed on the same substrate, and at least a part of the driving circuit includes a thin film transistor using the oxide semiconductor with gate electrodes 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. |