Patent ID: 8599114

Claim:
A pixel comprising: an organic light emitting diode; a first transistor coupled to a scan line and a data line, the first transistor configured to be turned on when a scan signal is supplied to the scan line; a storage capacitor for storing a voltage corresponding to a data signal supplied to the data line; a second transistor for supplying a current corresponding to the voltage stored in the storage capacitor, the current flowing from a first power supply to a second power supply via the organic light emitting diode; and a compensation unit for controlling a voltage of a gate electrode of the second transistor corresponding to a deterioration of the organic light emitting diode, and for coupling a first electrode of the second transistor to the data line during a compensation period in which a threshold voltage of the second transistor is compensated, wherein the compensation unit comprises: a fourth transistor and a fifth transistor, the fourth and fifth transistors being coupled between the first electrode of the second transistor and the data line; and a third transistor coupled between a first node and a voltage source, the first node being a common terminal of the fourth transistor and the fifth transistor.