Patent ID: 8878751

Claim:
An organic light emitting display device having a frame period comprising a reset period, a compensation period, a data period, and a light emission period, the organic light emitting display device comprising: pixels located at crossing regions between scan lines and data lines; a first control line and a second control line commonly coupled to the pixels; a control line driver configured to supply a first control signal to the first control line for the reset period and to supply a second control signal to the second control line during the reset period and the compensation period, wherein each of the pixels comprises: an organic light emitting diode; a first transistor having a first electrode, a second electrode and a gate electrode, and configured to control an amount of current supplied from a first power source through the first transistor from the first electrode to the second electrode, to a second power source via the organic light emitting diode; a second transistor coupled between the gate electrode of the first transistor and the second electrode of the first transistor and configured to be turned on when the second control signal is supplied to diode-couple the first transistor; and a fourth transistor coupled to the second electrode of the first transistor and configured to supply an initial voltage to the second electrode of the first transistor when the first control signal is supplied, wherein the pixels are concurrently emitted during the light emission period.