Patent ID: 8101979

Claim:
A pixel of an organic light-emitting display apparatus arranged on a substrate comprising: a display region comprising at least one pixel thin film transistor and an organic light emitting device electrically connected to the pixel thin film transistor; and a sensor region comprising a sensor thin film transistor, a charging unit, and a switch thin film transistor, wherein: the sensor thin film transistor comprises an amorphous silicon layer, a first insulating layer, and a sensor gate electrode that are sequentially stacked; the charging unit comprises a first charging electrode, a portion of the first insulating layer, and a second charging electrode that are sequentially stacked, the first charging electrode comprising a polysilicon layer placed on the same plane as the amorphous silicon layer, and the second charging electrode being placed on the same plane as the sensor gate electrode; and the switch thin film transistor is electrically connected to the at least one pixel in the display region and comprises a polysilicon layer, a portion of the first insulating layer, and a switch gate electrode that are sequentially stacked, the polysilicon layer being placed on the same plane as the first charging electrode, and the switch gate electrode being placed on the same plane as the second charging electrode.