Patent ID: 8319708

Claim:
An organic light emitting display device, comprising: a scan driving unit configured to drive scan lines, light-emitting control lines, and control lines; a data driving unit configured to supply reference power and data signals to data lines; and a plurality of pixels positioned near intersections of the scan lines and the data lines, each of the pixels positioned in horizontal row comprising: an organic light emitting diode coupled between first power and second power; a first transistor coupled to the first power, the first transistor configured to control an amount of current that flows to the organic light emitting diode from the first power; a second transistor coupled between a gate electrode of the first transistor and a data line, and configured to be turned on when a scan signal is supplied from a scan line; a third transistor coupled between a source electrode of the first transistor and initialization power, and configured to be turned on when a control signal is supplied from a control line; a fourth transistor coupled between the source electrode of the first transistor and the organic light emitting diode, the fourth transistor configured to be turned on when a light-emitting control signal is supplied from a light-emitting control line, and otherwise turned off; and a storage capacitor coupled between the gate and source electrodes of the first transistor.