Abstract: A pixel circuit of an organic EL display includes an EL device, first and second switching devices, a driving thin film transistor, and a capacitor. The first switching device switches data voltages applied to data lines in response to the selection signal applied to a scan line and the second switching device connects gate and drain of the driving thin film transistor in response to a compensation signal applied to a compensation line. The driving thin film transistor supplies electric current to the organic EL device in response to the data voltage inputted to a gate from the first switching device and the capacitor maintains the data voltage applied to the gate of the driving thin film transistor for a predetermined period.

Abstract: A polysilicon layer is formed on an insulating substrate and a gate insulating layer is formed on the polysilicon layer. A gate line is formed on the gate insulating layer and an interlayer insulating film is formed on the gate line. A data line and a pixel electrode are formed on the interlayer insulating film. A partition is formed on the data line and the pixel electrode and an organic EL layer is formed on the pixel electrode in a predetermined area defined by the partition. A common electrode is formed on the organic EL layer.