This invention discloses a new structure and approach to detect and compensate OLED nonuniformity
issue, including image sticking. On the TFT backplane, there are driving TFT and sensing
TFT. During OLED light on, while most light goes to top direction to the user, a small amount of light
goes to sensing TFT and be detected. There by comparing the level of the response of each sensing
TFT, system is able to know the luminous difference of each pixel. And then, adjust the appropriate
driving voltage to make the luminous closer. This will minimize the image sticking.
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INC, HP, "OLED WITH SELF COMPENSATION", Technical Disclosure Commons, (July 09, 2020)