Enhanced LED output using blue lasers for DMD headlight applications

Kenneth Li; Y. P. Chang; Stark Tsai; Lion Wang; Andy Chen

doi:10.1117/12.2610053

1 March 2022 Enhanced LED output using blue lasers for DMD headlight applications

Kenneth Li, Y. P. Chang, Stark Tsai, Lion Wang, Andy Chen

Proceedings Volume 12014, Emerging Digital Micromirror Device Based Systems and Applications XIV; 1201406 (2022) https://doi.org/10.1117/12.2610053
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Most of smart headlight engines are designed using blue LED or laser light sources for the exciting the phosphor conversion layer producing white light output. The phosphor conversion layers have been fabricated by silicone-based phosphor, glass-based phosphor, ceramic-based phosphor, and single crystal-based phosphor. Among these different phosphor materials, the single crystal phosphor (SCP) exhibits excellent thermal stability, better conversion efficiency, and high transparency to yellow light, but the required high-temperature fabrication process, has been an impediment for widespread commercial production. Recently, the issues of higher fabrication temperature of the SCP have been overcome by using a novel design of single crystal growth to produce SCP with higher yield and better uniformity. In this study, the smart headlight consists of a well-developed, high efficiency, automotive qualified white LED, a TI digit mirror device (DMD), a projection lens, and a LED together with two laser diodes and a SCP plate.

Conference Presentation

Citation Download Citation

Kenneth Li, Y. P. Chang, Stark Tsai, Lion Wang, and Andy Chen "Enhanced LED output using blue lasers for DMD headlight applications", Proc. SPIE 12014, Emerging Digital Micromirror Device Based Systems and Applications XIV, 1201406 (1 March 2022); https://doi.org/10.1117/12.2610053

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