Highly collimating micro-LED projection source enabled by metasurface

Zhengui Fan; Kangkang Chen; Kaixin Zhang; Enguo Chen; Yun Ye; Sheng Xu; Tailiang Guo

doi:10.1117/12.3005257

18 December 2023 Highly collimating micro-LED projection source enabled by metasurface

Zhengui Fan, Kangkang Chen, Kaixin Zhang, Enguo Chen, Yun Ye, Sheng Xu, Tailiang Guo

Author Affiliations +

Proceedings Volume 12964, AOPC 2023: Optical Design and Manufacturing ; 1296407 (2023) https://doi.org/10.1117/12.3005257
Event: Applied Optics and Photonics China 2023 (AOPC2023), 2023, Beijing, China

Abstract

As an important trend in future display technology, Micro-LED has significant advantages in brightness and contrast, as well as better color performance and response speed. Micro-LED and related display technologies have attracted increasing attention from the academic community in recent years. However, Micro-LEDs with Lambertian emission patterns cannot be directly used in projection displays. Therefore, complex relay optics are often required to collimate the emission light, increasing the system complexity. This paper proposes a novel Micro-LED structure that combines with meta surfaces on top of the Micro-LED. This structure can optically control the light field of Micro-LED into a highly collimating one from the originally Lambertian distribution. Compared with the initial Micro-LED structure, this configuration has good light emission characteristics with primary light concentration between 10 degree intervals. The designed structure has the light distribution with the full width at half maximum (FWHM) angle ±5.48°. At the same time, compared with the traditional Micro-LED structure, its center light intensity is increased to 21.98 times the original. This structure optimizes and improves the performance of Micro-LED in the field of projection display.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Zhengui Fan, Kangkang Chen, Kaixin Zhang, Enguo Chen, Yun Ye, Sheng Xu, and Tailiang Guo "Highly collimating micro-LED projection source enabled by metasurface", Proc. SPIE 12964, AOPC 2023: Optical Design and Manufacturing , 1296407 (18 December 2023); https://doi.org/10.1117/12.3005257

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KEYWORDS

Collimation

Light sources

Projection systems

Displays

Display technology

Structural design

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