超微型Micro-LED投影显示光学引擎设计  

Optical design of super miniature Micro-LED projection

作　　者：黎垚 江昊男 周自平 董金沛 陈恩果 叶芸 徐胜 孙捷 严群 郭太良 LI Yao;JIANG Hao-nan;ZHOU Zi-ping;DONG Jin-pei;CHEN En-guo;YE Yun;XU Sheng;SUN Jie;YAN Qun;GUO Tai-liang(National&Local United Engineering Laboratory of Flat Panel Display Technology,College of Physics and Information Engineering,Fuzhou University,Fuzhou 350108,China;Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China(Mindu Innovation Laboratory),Fuzhou 350108,China)

机构地区：[1]福州大学物理与信息工程学院平板显示技术国家地方联合工程实验室,福建福州350108 [2]中国福建光电信息科学与技术创新实验室(闽都创新实验室),福建福州350108

出　　处：《液晶与显示》2023年第7期910-918,共9页Chinese Journal of Liquid Crystals and Displays

基　　金：国家重点研发计划(No.2022YFB3603503);国家自然科学基金(No.62175032);漳州市科技重大项目(No.202110051);闽都创新实验室自主部署项目(No.2020ZZ111)。

摘　　要：随着微米级像素尺寸的微型自发光二极管(Micro-LED,μLED)的出现和发展,采用μLED作为光源和像源的超微型投影光学引擎成为了可能,其极大简化了传统投影显示光学引擎的结构。本文提出了一种基于μLED的超微型投影光学引擎,基于现有3.302 mm(0.13 in)的μLED显示芯片设计了高像质的微型投影镜头。针对μLED的光分布特性,优化μLED发散角度与微投影镜头的光瞳匹配,有效提升了μLED微投影光学系统的光能利用率。结果表明,所设计的μLED微投影显示光学引擎体积仅有18.35 mm^(3),投影镜头中心视场的MTF值在截止频率处超过0.57。该μLED微投影显示光学引擎较好地实现了系统体积与成像像质的均衡,未来在AR/VR等近眼显示设备上具有广泛的应用前景。With the emergence and development of self-luminous micron-pixel-sized Micro-LED(Micro light-emitting diode,μLED),usingμLED as the light and image source have become possible for ultra-compact projection optical engines.It greatly simplifies the structure of traditional projection display optical engines.In this paper,aμLED-based super miniature projection optical engine is proposed,and a high image quality pico-projection lens is designed based on 3.302 mm(0.13 in)μLED display chip.The divergence angle ofμLED display chip matched with the pupil of pico-projection lens is optimized according to the light distribution characteristics ofμLED chip,which effectively improves the light efficiency ofμLED based pico-projection optical system.The results show that the volume of the system is only 18.35 mm3,and the MTF value of the center field of view of the projection lens exceeds 0.57 at the cut-off frequency.TheμLED based pico-projection display optical engine achieves a good trade-off between system volume and image quality,and has a wide application prospect in near-eye display devices such as AR/VR in the future.

关 键 词：Micro-LED 近眼显示 微投影显示 光学设计 系统效率 

分 类 号：TN27[电子电信—物理电子学] TN761