A New Pixel Circuit Compensating for Strain-Induced Luminance Reduction in Stretchable Active-Matrix Organic Light Emitting Diode Displays

A new compensation pixel circuit is proposed for a stretchable active-matrix organic light-emitting diode (AMOLED) display. The proposed pixel circuit utilizes a double-gate structure driving thin-film transistor (TFT) and a capacitive strain sensor to compensate for the change in TFT threshold voltage and luminance reduction due to display deformation. Simulation results showed that the current error rate as a result of threshold voltage variation was less than 6.5%, even under a 15% strain. Also, the current error due to luminance reduction was reduced significantly under the 15% strain at all gray levels.