| Citation: | 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. Design and optimization of Micro LED vehicle light projection optical system[J].Chinese Optics.doi:10.37188/CO.2023-0063
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This article presents a vehicle headlight projection scheme based on Micro LED arrays. A 200×150 white Micro LED array with pixel size of 80 μm×80 μm 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 the image trapezoidal distortion coefficients p1and p2decrease 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.
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