Organic light emitting display device and driving method thereof

An organic light emitting diode (OLED) display device, comprising:

• a plurality of pixels each including a light emitting diode (OLED) and a driving transistor supplying a driving electric current to the organic light emitting diode (OLED);
• a compensator sinking a predetermined electric current into a path by which the driving electric current flows in the organic light emitting diode (OLED) through a data line electrically connected to each of the plurality of pixels, making a determination of a threshold voltage and a kickback voltage of the driving transistor by receiving a predetermined voltage applied to a gate electrode of the driving transistor included in each of the plurality of pixels in accordance with the predetermined electric current, and making a determination of an amount of compensation in accordance with an input image data signal in dependence upon the threshold voltage and the kickback voltage determined;
• a timing controller responding to the amount of compensation by adjusting the input image data signal received, and transmitting the adjusted image data signal;
• and
• a data driver generating a data voltage on a basis of the adjusted image data signal, and supplying the data voltage to the plurality of pixels.