Patent ID: 7015884

Claim:
An organic electroluminescent display (OELD), comprising: a plurality of data lines for transmitting data voltages for representing image signals; a plurality of scan lines for transmitting select signals; and a plurality of pixel circuits respectively formed on a plurality of pixels defined by the data lines and the scan lines, wherein each of the pixel circuit comprises: an organic electroluminescent (EL) element for emitting light corresponding from a supplied current; a first switch for switching data voltage supplied to a data line in response to a select signal supplied to a scan line; a first thin film transistor (TFT) for supplying the current to the organic EL element in response to the data voltage supplied to a gate of the first TFT via the first switch; a second TFT having a gate coupled to the gate of the first TFT and compensating for a threshold voltage deviation of the first TFT; a capacitor for maintaining the data voltage supplied to the gate of the first TFT during a predetermined time; and a second switch for initializing the data voltage supplied to the gate of the first TFT in response to a control signal.