Optical design of a micro DLP projection system based on LEDs and an innovative light pipe

DOI

10.2991/icismme-15.2015.253How to use a DOI?

Keywords

optical design; DMD; LED; light pipe; light efficiency.

Abstract

Micro projection systems not only can be applied in portable display technology, but can also be applied to adaptive automobile headlamps. Present DLP technology cannot collect and utilize the light which is reflected by the micromirrors of the DMD in the "OFF" state. Aiming at this defect, a design scheme of a micro DLP projection system based on LEDs and an innovative light pipe is presented. First, the related parameters of each part are calculated according to the nonimaging optics theory. Second, the projection lens is optimized using ZEMAX software. Finally, we build a model and simulate it in TracePro software. The simulation results show that: when all the micromirrors of the DMD are in the "ON" state, the light efficiency is 36.13%; when half of the micromirrors are in the "OFF" state, the light efficiency is 27.23%.Compared with having no light pipe, the light efficiency is increased by 5.33%.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xiangbing Zhu
AU  - Cheng Wang
AU  - Wenliang Hao
AU  - Liwei Tian
AU  - Ruofei Wang
PY  - 2015/07
DA  - 2015/07
TI  - Optical design of a micro DLP projection system based on LEDs and an innovative light pipe
BT  - Proceedings of the First International Conference on Information Sciences, Machinery, Materials and Energy
PB  - Atlantis Press
SP  - 1188
EP  - 1192
SN  - 1951-6851
UR  - https://doi.org/10.2991/icismme-15.2015.253
DO  - 10.2991/icismme-15.2015.253
ID  - Zhu2015/07
ER  -