Enhancing stretchable display performance: IGZO TFT pixel circuit with luminance compensation

Despite the flexible form factor advantages of stretchable organic light-emitting diode displays, their luminance diminishes as the area expands. In this study, we introduced and assessed a novel pixel circuit aimed at efficiently compensating for luminance changes resulting from the stretching of the display area. The proposed pixel circuit incorporates a sensing capacitor for compensation, enhancing pixel current to counteract luminance reduction when the pixel expands through stretching. The sensor capacitor's capacitances align with the stretched area, resulting in a 16.9% increase in pixel current with a 10% capacitance rise and a 24.1% increase with a 20% capacitance increase. This observation serves as evidence of the circuit's successful compensation for stretching. Additionally, the proposed pixel circuit can reduce both data and power voltages compared to the conventional one. Consequently, the proposed pixel circuit offers lower power consumption compared to the conventional one.