Patent ID: 8299471

Claim:
An organic electroluminescent device, comprising: a substrate, comprising a first control area and a second control area; a polysilicon active layer disposed on the first control area; a first conductivity type source/drain area disposed in the polysilicon active layer; a first dielectric layer disposed on the polysilicon active layer serving as a first gate dielectric layer; a first gate and a second gate disposed over the polysilicon active layer and the second control area respectively, wherein the first gate and the first conductivity type source/drain area constitute a first conductivity type thin film transistor serving as a switch element; a second dielectric layer disposed on the first gate and the second gate serving as a second gate dielectric layer; a micro-crystal silicon active layer disposed over the second gate; and a second conductivity type source/drain area disposed in the micro-crystal silicon active layer, wherein the second gate and the second conductivity type source/drain area constitute a second conductivity type thin film transistor serving as a driving element.