Organic light emitting display

An organic light emitting display, comprising:

• pixels positioned at crossing regions of scan lines, emission control lines, sensing lines, and data lines, wherein each of the pixels comprises:
• an organic light emitting diode (OLED) having a cathode electrode coupled to a second power source;
• a second transistor having a second electrode coupled to an anode electrode of the OLED in order to supply a current to the OLED;
• a first transistor coupled between a data line of the data lines and a gate electrode of the second transistor and configured to be turned on when a scan signal is supplied to a scan line of the scan lines;
• a third transistor coupled between a first electrode of the second transistor and a first power source and configured to be turned off when an emission control signal is supplied to an emission control line of the emission control lines;
• and
• a storage capacitor coupled between the gate electrode of the second transistor and the first electrode of the second transistor;
• a sensor for extracting information on deterioration of OLEDs and information on threshold voltages and mobilities of the second transistors of the pixels;
• a converter for changing supplied data to generate corrected data using the information on the deterioration of the OLEDs and the information on the threshold voltages and mobilities of the second transistors;
• and
• a data driver for generating data signals to be supplied to the data lines using the corrected data.