Brightness increase in LED by recycling of light for projection applications

George Ouyang; Kenneth Li

doi:10.1117/12.717483

6 February 2007 Brightness increase in LED by recycling of light for projection applications

George Ouyang, Kenneth Li

Proceedings Volume 6489, Projection Displays XII; 648903 (2007) https://doi.org/10.1117/12.717483
Event: Integrated Optoelectronic Devices 2007, 2007, San Jose, California, United States

Abstract

A general theory on light-pipe/tunnel-based recycling schemes, along with some experimental data obtained from LED illuminators, is presented in this paper. Light recycling is classified as angular, spatial, or mixed based on the angular filtering characteristics of the recycling process. The principles behind the three schemes are analyzed and some experimental results are presented at the end.

Citation Download Citation

George Ouyang and Kenneth Li "Brightness increase in LED by recycling of light for projection applications", Proc. SPIE 6489, Projection Displays XII, 648903 (6 February 2007); https://doi.org/10.1117/12.717483

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