Patent ID: 8716702

Claim:
An organic light-emitting display device comprising: a buffer layer on a substrate, and comprising sequentially stacked materials having different refractive indexes; source and drain electrodes on the buffer layer and spaced apart from each other; a first active layer of a thin film transistor between the source and drain electrodes, and a second active layer spaced apart from the first active layer at a same layer as and comprising a same material as the first active layer; a first insulation layer on the buffer layer, the source and drain electrodes, and the first and second active layers, the first insulation layer comprising sequentially stacked materials having different refractive indexes; a first gate electrode corresponding to a center region of the first active layer with the first insulation layer therebetween, and a pixel electrode spaced apart from the first gate electrode at a same layer as and comprising a same material as the first gate electrode; and a second gate electrode on the first gate electrode.