Patent ID: 9349781
Filing Date: 2016-05-24
CPC Classification: G09G,H01L

Claim Text:
1. An organic light emitting diode display, comprising: a substrate; a semiconductor layer formed on the substrate and including a switching semiconductor layer, a driving semiconductor layer, and a light emission control semiconductor layer spaced apart from each other, the light emission control semiconductor layer being used to select a pixel to emit light; a first gate insulating layer covering the semiconductor layer; a light emission control gate electrode formed on the first gate insulating layer and overlapping the light emission control semiconductor layer; a second gate insulating layer covering the light emission control gate electrode; a switching gate electrode and a driving gate electrode formed on the second gate insulating layer and respectively overlapping the switching semiconductor layer and the driving semiconductor layer; and an interlayer insulating layer covering the switching gate electrode, the driving gate electrode, and the second gate insulating layer; a doping concentration of a channel region of the driving semiconductor layer being higher than a doping concentration of the channel region of the light emission control semiconductor layer, a doping impurity of the channel region of the driving semiconductor layer and a doping impurity of the channel region of the light emission control semiconductor layer being a same type of doping impurity.