Design of lighting system for head-mounted display device

Chunlei Xing; Yujie Chen; Feng Xu; Suodong Ma

doi:10.1117/12.2605793

24 November 2021 Design of lighting system for head-mounted display device

Chunlei Xing, Yujie Chen, Feng Xu, Suodong Ma

Proceedings Volume 12066, AOPC 2021: Micro-optics and MOEMS; 1206610 (2021) https://doi.org/10.1117/12.2605793
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

As a typical miniaturized smart device, the miniature projection system is an important part of a head-mounted display device. In the micro-projection system with a LCOS or a DMD as the display chip, the performance of the lighting system directly affects the final imaging quality. We design and simulate two lighting systems based on compound eyes and a diffuser respectively. The design shows that without considering the loss of polarized light the light energy utilization rate of the system based on compound eyes is 70.3% while that of the system based on a diffuser is 25%, and with the ANSI nine-point sampling method the calculated uniformity of the system based on compound eyes is 91%, while that of the system based on a diffuser is 88%, and the axial length of the lighting system based on the diffuser is 0.6 times that of the lighting system based on compound eyes. According to the analysis of design results, the compound eyes based system results in higher energy utilization and uniformity compared with a diffuser based one. Since the compound eyes based system needs a relay system, it nevertheless has a larger volume. Therefore, it is necessary to choose a suitable lighting method according to actual needs of a specific head-mounted display device.

Citation Download Citation

Chunlei Xing, Yujie Chen, Feng Xu, and Suodong Ma "Design of lighting system for head-mounted display device", Proc. SPIE 12066, AOPC 2021: Micro-optics and MOEMS, 1206610 (24 November 2021); https://doi.org/10.1117/12.2605793

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KEYWORDS

Light sources and illumination

Diffusers

Relays

Light emitting diodes

Head-mounted displays

Liquid crystal on silicon

Projection systems

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