Thermal-responsive gamma adjustment for mitigating luminance non-uniformity in AMOLED technology

Abstract

Luminance non-uniformity remains a significant challenge in AMOLED (Active Matrix Organic Light Emitting Diode) displays, primarily caused by thermal gradients and OLED material degradation under varying temperature conditions. This study aimed to develop and validate a thermal-responsive gamma adjustment technique to mitigate luminance inconsistencies and improve image fidelity across a temperature range of 10°C to 80°C. A custom-designed AMOLED display module was employed, integrated with multiple embedded thermal sensors and controlled via a microcontroller unit for real-time data acquisition. The dynamic gamma correction algorithm was implemented using MATLAB R2022a and Python 3.9, while luminance uniformity and image fidelity scores were measured with a Konica Minolta CS-2000 luminance meter. Thermal behavior was monitored using a FLIR T540 thermal camera. Results indicated significant improvements in both luminance uniformity and image fidelity post-adjustment, with uniformity indices increasing from 0.65-0.82 to 0.88-0.95, and image fidelity scores improving from 70-80 to 85-92 (p