Novel analog feedback current programming architecture compatible with 2-transistor 1-capacitor pixel for active matrix organic light-emitting diode displays

A new feedback current programming architecture is described, which is compatible with active matrix organic light-emitting diode (AMOLED) displays having the 2T1C pixel structure. The new pixel programming approach is compatible with all TFT technologies and can compensate for non-uniformities in both threshold voltage and carrier mobility of the pixel OLED drive TFT. Based on circuit simulations, a pixel drive current of less than 10 nA can be programmed in less than 50 µ. This new approach can be implemented within an AMOLED external or integrated display data driver.

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