Patent ID: 9396675
Filing Date: 2016-07-19
CPC Classification: G09G

Claim Text:
1. A method for sensing degradation of an organic light emitting display including a plurality of subpixels each including an organic element and a driving thin film transistor (TFT) controlling an emission amount of the organic element and a sensing unit connected to at least one of the plurality of subpixels through a sensing line, the method comprising: during an initialization period, applying a sensing data voltage to a gate node of the driving TFT and applying an initialization voltage to a source node of the driving TFT to turn on the driving TFT; during a boosting period, floating the gate node and the source node of the driving TFT and applying a drain-to-source current of the driving TFT to the organic element to turn on the organic element; during a sensing period, again applying the initialization voltage to the source node of the driving TFT, a gate-to-source voltage of the driving TFT set to be indicative of a degradation degree of the organic element as a result of again applying the initialization voltage, and charging a line capacitor of the sensing line with the drain-to-source current of the driving TFT that is controlled by the set gate-to-source voltage; and during a sampling period, outputting a voltage of the line capacitor as a sensing voltage.