Organic light emitting diode display and driving method thereof

A method of driving an organic light emitting diode display including a display unit having a plurality of pixels, a data driver configured to transfer data signals to each of the pixels, a scan driver configured to transfer scan signals to each of the pixels, a sensing driver configured to transfer sensing signals to each of the pixels, a light emitting control driver configured to transfer light emitting control signals to each of the pixels, and a compensator configured to determine data signal compensation for image signals transferred to each of the pixels, the method comprising:

• sensing a degree of ageing of the organic light emitting diode of each of the pixels of a group of pixels or sensing deviation of a driving transistor of each pixel of the group;
• writing compensated data signal according to a data signal compensated based on the degree of ageing of the organic light emitting diode or the deviation of the driving transistor;
• and
• simultaneously emitting light from the pixels according to the compensated data signal.