Patent ID: 8405161
Filing Date: 2013-03-26
Classification: H01L

Abstract:
1. A driving device for a unit pixel of an organic light emitting display, the driving device for a unit pixel comprising: a switching thin film transistor (TFT) and a driving TFT, which are disposed on a substrate and in communication with each other; wherein the switching TFT comprises a first dual channel layer and a first gate electrode, the first dual channel layer comprising a first amorphous semiconducting silicon layer and the first polycrystalline silicon layer, and a first gate electrode is disposed below the first dual channel layer; wherein the driving TFT comprises a second dual channel layer and a second gate electrode, the second dual channel layer comprising a second amorphous semiconducting silicon layer and a second polycrystalline silicon layer, and the second gate electrode is disposed above the second dual channel layer, and wherein a first insulating layer is disposed between the first dual channel layer and the first gate electrode and a second insulating layer is disposed between the second dual channel layer and the second gate electrode.