Organic light emitting display device and method for driving the same

An organic light emitting display device, comprising:

• a display panel including a plurality of pixels having an organic light emitting diode and a pixel circuit configured to cause the organic light emitting diode to emit light;
• a gate driver configured to supply the plurality of pixels with a scan signal used for driving the plurality of pixels and a sensing signal for sensing;
• a data driver configured to supply respective data voltages and a reference voltage to the plurality of pixels in a driving mode, and sense respective voltages charged into the plurality of pixels in a sensing mode;
• a discharging driving unit configured to initialize voltages of a plurality of reference power lines corresponding to the plurality of pixels after the display device switches from the driving mode to the sensing mode;
• a timing controller configured to control the gate driver, the data driver, and the discharging driving unit to operate in and switch between the driving mode and the sensing mode;
• and
• a memory configured to store compensation data for the plurality of pixels, the respective data voltages supplied by the data driver to the plurality of pixels being compensated with the compensation data.