Patent ID: 9041633
Filing Date: 2015-05-26
Classification: G09G,H05B,Y02B

Abstract:
1. An organic light emitting display device coupled between a first power source and a second power source, the organic light emitting display comprising: a display unit having a plurality of pixels located at crossing regions of scan lines, control lines, data lines and sensing lines, each of the pixels comprising an organic light emitting diode and a driving transistor coupled between the first power source and the organic light emitting diode and having a gate electrode coupled to a first node; a scan driver configured to supply scan signals to the scan lines; a control line driver configured to supply control signals to the control lines; a data driver configured to supply data signals to the data lines; a switching unit configured to selectively electrically couple the data lines to output lines of the data driver, a reference voltage source, or a negative bias voltage source; a sensing unit configured to sense degradation information of the organic light emitting diode and threshold voltage information of the driving transistor through the sensing lines; a control block configured to store the degradation information of the organic light emitting diode and the threshold voltage information of the driving transistor, sensed by the sensing unit; and a timing controller configured to generate second data by converting externally supplied first data using the degradation information of the organic light emitting diode and the threshold voltage information of the driving transistor and to supply the second data to the data driver, wherein one frame period is divided into a display subframe period and a black subframe period, during the display subframe period, an image is displayed corresponding to a corresponding data signal of the data signals generated from the second data, and the degradation information of the organic light emitting diode of each of the pixels on a selected horizontal line is sensed, and during the black subframe period, the threshold voltage information of the driving transistor of each of the pixels on the selected horizontal line is sensed, and a negative bias voltage of the negative bias voltage source or a turn-off voltage of the driving transistor is supplied to the gate electrode of the driving transistor of each of the pixels on other horizontal lines, wherein each of the pixels further comprises: