Pixel, organic light emitting display device using the same, and method of driving the organic light emitting display device

An organic light emitting display device, comprising:

• a plurality of pixels connected to scan lines, data lines, and emission control lines;
• a scan driver to supply scan signals to the scan lines;
• an emission control driver to supply emission control signals to the emission control lines;
• and
• a data driver to supply data signals to the data lines, wherein each of the pixels on an ith (i is a natural number) horizontal line includes:
• an OLED having a cathode electrode connected to a second power source;
• a pixel circuit including a driving transistor to control an amount of current that flows from a first power source to the second power source via the OLED;
• a first transistor connected between a fourth power source different from a third power source and the second power source and an anode electrode of the OLED, the first transistor to be turned on based on a scan signal supplied to an ith scan line;
• a second transistor connected between a data line and the pixel circuit, the second transistor to be turned on based on the scan signal supplied to the ith scan line;
• and
• a third transistor connected between a gate electrode of the driving transistor and the third power source, the third transistor to be turned on based on a scan signal supplied to an (i−1)th scan line.

A method for driving an organic light emitting display device, including pixels connected to scan lines and data lines, the pixels including driving transistors to control amounts of currents supplied to organic light emitting diode (OLEDs) based on data signals, the method comprising:

• initializing gate electrodes of the driving transistors based on a voltage of a third power source;
• storing the data signals and initializing anode electrodes of the OLEDs based on a voltage of a fourth power source;
• and
• controlling amounts of currents that flow from a first power source to a second power source, via the OLEDs, based on the data signals, wherein a voltage of the fourth power source is greater than a voltage of the second power source.