Patent ID: 6946689

Claim:
A control thin film transistor for controlling an organic light-emitting diode (OLED), comprising: a substrate; a semiconductor layer disposed on the substrate as a channel region; a first and second doped region sequentially disposed on first side of the semiconductor layer, wherein the doped concentration of the first doped region is lower than that of the second doped region, and the first doped region serves as a single-side lightly doped drain region and the second doped region serves as a drain region; a third doped region disposed on a second side of the semiconductor layer, which is opposite to the first side, serving as a source region; an insulating layer disposed on the surface of the semiconductor layer, and the first, second, and third regions; a source and drain electrode penetrating the insulating layer contacting the source and drain regions respectively, wherein the drain electrode receives a drain voltage and the source electrode is electrically connected to an OLED unit; and a conductive layer serving as a gate layer disposed in the insulating layer, at approximately the top right portion of the semiconductor layer.