Patent ID: 7859491

Claim:
A pixel circuit of an organic light emitting display comprising: a first transistor that transmits a data signal from a data line in response to a selection signal from a scan line; a second transistor that transmits the data signal from the first transistor in response to the selection signal from the scan line; a third transistor that is diode-connected by the second transistor to transmit the data signal; a first capacitor that stores the data signal from the third transistor; a fourth transistor that generates a driving current; a fifth transistor that connects a gate electrode and a drain electrode of the fourth transistor in a diode-connected configuration to store a threshold voltage of the fourth transistor in response to the selection signal from the scan line; a second capacitor that stores the threshold voltage of the fourth transistor; a sixth transistor that transmits a combined voltage of the first and second capacitors to the fourth transistor to generate the driving current in response to the selection signal from the scan line; a seventh transistor that transmits the driving current generated in the fourth transistor; and an organic light emitting diode that emits light corresponding to the driving current from the seventh transistor.