Micro LED车灯投影光学系统设计与优化  

Design and optimization of Micro LED vehicle light projection optical system

作　　者：李香兰 金霞 吕金光[1] 郑凯丰 陈宇鹏 赵百轩 赵莹泽 秦余欣[1] 王惟彪[1] 梁静秋[1] LI Xiang-lan;JIN Xia;LV Jin-guang;ZHENG Kai-feng;CHEN Yu-peng;ZHAO Bai-xuan;ZHAO Ying-ze;QIN Yu-xin;WANG Wei-biao;LIANG Jing-qiu(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China;The 46th Research Institute of China Electronics Technology Group Corporation,Tianjin 300220,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院大学,北京100049 [3]中国电子科技集团公司第四十六研究所,天津300220

出　　处：《中国光学（中英文）》2024年第1期89-99,共11页Chinese Optics

基　　金：国家重点研发计划(No.2022YFB3604702);吉林省科技发展计划(No.20200401056GX)。

摘　　要：本文提出了一种基于Micro LED阵列的车灯投影方案,设计了以像素尺寸为80μm×80μm的200×150白光Micro LED阵列作为显示光源,视场角为16°×34°的车灯投影光学系统,并对物面倾斜角度和光学系统结构进行了优化。此外,分别采用反向畸变处理方法和像素灰度调制方法用以解决车灯投影图像的梯形畸变和照度均匀性问题,并搭建了投影实验平台,对图像校正方法进行了验证。实验结果表明:校正后图像梯形畸变系数p1,p2分别从0.0932和0.3680下降至0.0835和0.0373,像面照度均匀性从83.2%提高到93.2%。本文通过对基于Micro LED的倾斜投影车灯光学系统进行优化设计及采用图像校正方法,实现了高光效、低畸变的车灯投影。This article presents a vehicle headlight projection scheme based on Micro LED arrays.A 200×150 white Micro LED array with pixel size of 80μm×80μm is designed as the display light source,and a headlight projection optical system with a field of view of 16°×34°is designed.The object plane tilt angle and optical system structure are optimized.In addition,the inverse distortion processing method and pixel grayscale modulation method are used to solve the trapezoidal distortion and uniformity of illumination of the headlight projection image.A projection experimental platform is built to verify the image correction method.Experimental results show that after correction,the image trapezoidal distortion coefficients p1 and p2 decrease from 0.0932 and 0.3680 to 0.0835 and 0.0373,respectively,and the image plane illumination uniformity increases from 83.2%to 93.2%.This article achieves high light efficiency and low distortion of vehicle headlight projection by optimizing the design of the inclined projection headlight optical system based on Micro LEDs and using image correction methods.

关 键 词：车灯投影光学系统 光学设计 Micro LED 照度均匀性 梯形畸变 

分 类 号：TP394.1[自动化与计算机技术—计算机应用技术] TH691.9[自动化与计算机技术—计算机科学与技术]