Research Progress on Angular Color Shift of Micro-Light-Emitting Diode

Review article, 2025

Micro-light-emitting diode (Micro-LED) has attracted widespread attention in academia and the display industry due to its outstanding performance characteristics, such as high contrast, fast response time, and low power consumption. Angular color shift, which refers to the color differences presented by display devices from different viewing angles, can alter the color gamut and contrast of Micro-LED displays, thereby affecting the user's visual experience. This article aims to analyze the causes and main influencing factors of the angular color shift phenomenon, and comprehensively review the current solutions for alleviating angular color shift, including optimizing device structural parameters, adding black matrix structure, designing reflective structure, and using optical thin film structure. Based on various solutions to alleviate angular color shift, this article looks forward to possible research directions. Further optimization design of black matrix and reflective structure, as well as exploration of optical thin film structure with superior performance, may have higher efficiency and potential in suppressing the angular color shift phenomenon of Micro-LED, and may be a more worthwhile direction for further research.