Patent ID: 7696521

Claim:
An organic light emitting diode (OLED) display device comprising: a substrate having a first capacitor region, a second capacitor region, and a thin film transistor (TFT) region; a first capacitor disposed on the first capacitor region of the substrate, the first capacitor including a first semiconductor layer having an impurity doped first region extending from an undoped region, a first electrode, and a first insulating layer disposed between the first semiconductor layer and the first electrode; a second capacitor disposed on the second capacitor region of the substrate, the second capacitor including a second semiconductor layer, a second electrode, and a second insulating layer disposed between the second semiconductor layer and the second electrode; a thin film transistor (TFT) disposed on the TFT region of the substrate, the TFT including a third semiconductor layer having a source region, a drain region and a channel region, a gate electrode, a gate insulating layer disposed between the gate electrode and the channel region, a source electrode connected to the source region, and a drain electrode connected to the drain region; a power supply voltage line disposed on the first capacitor and electrically connected to the first region of the first semiconductor layer; and an organic light emitting diode disposed on the TFT and including at least one organic emission layer.