Patent ID: 8519914

Claim:
An organic light emitting display device, comprising: pixels at crossing regions of scan lines, light emission control lines, sensing lines, and data lines; a sensor configured to extract deterioration information from organic light emitting diodes included in the pixels during a first sensing period and configured to extract threshold voltage and mobility information of driving transistors included in the pixels during a second sensing period; a converter configured to generate corrected data by changing input data based on the deterioration information and the threshold voltage and mobility information extracted by the sensor; a data driver configured to supply data signals to the data lines, the data signals being based on the corrected data during a driving period in which an image is displayed by the pixels and the data signals being reference data signals during the second sensing period; and a switching unit coupled to the data lines for selectively connecting the data lines with the data driver or the sensor, the switching unit comprising a sensing circuit configured to extract the deterioration information and the threshold voltage and mobility information, wherein the sensor is configured to extract, during the second sensing period, the threshold voltage and mobility information of the driving transistors utilizing second electric currents that are supplied from the pixels in response to the reference data signals, and wherein the sensing circuit comprises: an electric current source coupled to a data line of the data lines and configured to supply a first electric current the data line during the first sensing period; a third switching element coupled between the electric current source and the switching unit; a sensing resistor configured to be supplied with a second electric current of the second electric currents from a corresponding one of the pixels; and a fourth switching element coupled between the sensing resistor and the switching unit.