Displays such as LCD, AMOLED, micro-LED, etc. can suffer from screen non-uniformities, known as mura. While display manufacturers attempt to compensate for mura during manufacture, non-uniformities or irregularities in screen color or brightness are still palpable, especially in low light/ low panel brightness conditions, or when the device is in a night mode. This disclosure describes software-based techniques to improve screen uniformity. One or more RGBA mura-compensation layers are determined and stored for each of several display or lighting conditions. The current display or lighting condition is determined and the appropriate mura-compensation layer is merged with the current screen using a layer mixer.
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Huang, Sianyi, "Software-based Improvement of Screen Uniformity", Technical Disclosure Commons, (May 21, 2020)