Patent ID: 9659528
Date: 2017-05-23
CPC Classifications: G09G

Claim:
1. A method for controlling an organic light emitting display device, the organic light emitting display device including a plurality of pixels for generating images, each of the plurality of pixels including at least one switching thin film transistor (TFT) connected to a gate line and a data line, a driving TFT connected to a high voltage line and to the at least one switching TFT, and an organic light emitting diode (OLED) connected to the driving TFT, the method comprising: varying a voltage at the high voltage line in a step-increased format, providing the varied voltage in the step-increased format to a drain of a specific driving TFT as a drain voltage, and measuring a source voltage of the specific driving TFT to sense a variation in the source voltage over a predetermined time duration; varying the drain voltage according to the sensed variation in the source voltage of the specific driving TFT to generate a varied drain voltage; applying the varied drain voltage to the drain of the specific driving TFT in one of the plurality of pixels; and compensating the specific driving TFT by the varied drain voltage, so as to maintain a constant drain-source voltage at the specific driving TFT.