Advanced power structure for enhanced optical performance of AMOLED displays at low luminance levels

To improve the image quality of active-matrix organic light-emitting diode (AMOLED) displays at low luminance levels, a novel power structure is proposed. Its effectiveness was validated by fabricating a 13-inch AMOLED panel with a tandem OLED and evaluating its optical performance. Compared to the conventional structure, the proposed structure reduced panel luminance deviation by 12% and color deviation by 41%, while also achieving a 41% reduction in hysteresis-induced color shift. As the temperature compensation capability was enhanced, luminance and color inconsistencies were minimized. By achieving these improvements, the proposed structure effectively addresses a key commercialization challenge for high-efficiency AMOLED technologies. While high-efficiency technologies enable high brightness and low power consumption, they also increase the sensitivity of luminance to small current deviations, making it more difficult to maintain image quality at low luminance. The proposed structure addresses this issue by applying individually optimized anode initialization voltages to each color subpixel, enabling more precise control of the OLED driving conditions and demonstrating substantial improvements in low-luminance image quality.