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Proceedings Paper

Simple color sequential LCoS illumination system used for projection display
Author(s): Huifang Gao; Qinxiao Liu; Wenzi Zhang; Peng Liu; Feihong Yu
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Paper Abstract

Illuminating system gives attention to the transmission efficiency and spatial uniformity. Various non-imaging components were used as the illuminating system for the projection system to collect the light emitted by Light-Emitting Diodes, such as light pipe, CPC and flyeyes lens. For the micro projection, the key is to find a useful method to keep the system compact which causes little loss of the efficiency and spatial uniformity. Kohler illumination is an efficient method to get the uniformity lighting zone on the pupil plane of the optical system. According to the principle of the Kohler illumination, in this paper, we proposed to set the stop on the LCoS front surface for the first time. It can be found that this method can give satisfied results by using two simple lens. In order to get the white light from the R, G, B LEDs, the color matching method by using the actual measurement chromaticity coordinate is also given. Simulation results show that both the solutions can give efficient illumination and the system with aspherical lens can give more uniformity.

Paper Details

Date Published: 22 July 2010
PDF: 9 pages
Proc. SPIE 7749, 2010 International Conference on Display and Photonics, 774926 (22 July 2010); doi: 10.1117/12.870471
Show Author Affiliations
Huifang Gao, Zhejiang Univ. (China)
Qinxiao Liu, Zhejiang Univ. (China)
Wenzi Zhang, Zhejiang Univ. (China)
Peng Liu, Zhejiang Univ. (China)
Feihong Yu, Zhejiang Univ. (China)


Published in SPIE Proceedings Vol. 7749:
2010 International Conference on Display and Photonics

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