Organic light emitting display device and method of driving the same

An organic light emitting display device, which includes a display panel including a plurality of pixels including a pixel circuit for emitting light from an organic light emitting diode and a driving circuit unit driving the display panel, comprising:

• a determination unit configured to load sensing data, generated by sensing driving, from a data driver of the driving circuit, and analyze the sensing data to determine whether to perform a compensation mode on a characteristic of driving thin film transistors (TFTs) of all or some of the plurality of pixels;
• a compensation unit configured to calculate a change in characteristic of the driving TFT of each of the plurality of pixels by using the sensing data to generate compensation data used to compensate for the characteristic of the driving TFT of each pixel;
• a panel driving unit configured to correct external input data by using the compensation data to supply the corrected pixel data to the data driver, according to an input compensation mode, a predetermined compensation driving time, or the determined result by the determination unit;
• and
• an input device configured to generate a compensation mode selection signal according to selection of the compensation mode by a user, and supply the compensation mode selection signal to the compensation unit.