A 1.37” smart‐watch size active‐matrix microLED display prototype was fabricated by Cd‐free R/G/B quantum dots pumped by UV microLEDs in an innovative 4‐sub‐pixel architecture. The temperature‐dependent emission properties from such quantum dot display have been studied based on the competing processes between LTPS TFT output current and UV microLED radiance. Our studies show that with proper thermal treatment, the photo brightening of QDs can be stabilized within 5%. This presents a promising route to develop microLED displays with brightness insensitive to operation temperature up to 90ºC.
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Tzen et al. (2024) studied this question.
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