Current PWM Pixel Driving Circuit for OLED Recession Compensation

This paper aims to solve some existing problems in OLED micro display—when showing highlighting static images with a high contrast ratio for very long time,the OLED micro display presents quite different phenomena in the process of pixel and brightness recession,and when the images are updated,sticking appear on the micro display-through making some compensation for the pixel recession on the OLED micro display in the current PWM pixel driving circuit.In the paper,a brief introduction of the structure and theoretical analysis of the working principles of the driving circuit are given.It introduces the principle of OLED pixel recession and compensation in the driving circuit,and analyzes the relations between the recession and compensation process and some parameters in the circuit through trials and errors in the experiment.The conclusion that shows when the difference of the pixel recession is below 30 MΩ,the ratio of pixel recession in the current PWM driving circuit is only 50% of the traditional driving circuit.