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- W4321436084 abstract "The three-primary-color chip array is the most straightforward to realize full-color micro-LED displays. However, the luminous intensity distribution shows high inconsistency between the AlInP-based red micro-LED and GaN-based blue / green micro-LEDs, resulting in the issue of angular color shift with different viewing angles. This Letter analyzes the angular dependence of color difference of conventional three-primary-color micro-LEDs, and proves that the inclined sidewall with homogeneous Ag coating has a limited angular regulation effect for micro-LEDs. Based on this, a patterned conical microstructure array is designed on the micro-LED's bottom layer to effectively eliminate the color shift. This design cannot only regulate the emission of full-color micro-LEDs to perfectly meet Lambert's cosine law without any external beam shaping elements, but also improve the light extraction efficiency of top emission by 16%, 161%, and 228% for red, green, and blue micro-LEDs, respectively. The color shift Δu'v' of the full-color micro-LED display is also kept below 0.02 with the viewing angle ranging from 10° to 90°." @default.
- W4321436084 created "2023-02-22" @default.
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- W4321436084 date "2023-03-21" @default.
- W4321436084 modified "2023-10-18" @default.
- W4321436084 title "Omnidirectional color shift suppression of full-color micro-LED displays with enhanced light extraction efficiency" @default.
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- W4321436084 doi "https://doi.org/10.1364/ol.486014" @default.
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