Research on angle-selective filters of phosphor color wheel for LED projectors

Tzu-Chiao Wei; Chien-Cheng Kuo; June-Jei Huang; Cheng-Chung Lee

doi:10.1117/12.860460

19 August 2010 Research on angle-selective filters of phosphor color wheel for LED projectors

Tzu-Chiao Wei, Chien-Cheng Kuo, June-Jei Huang, Cheng-Chung Lee

Proceedings Volume 7786, Current Developments in Lens Design and Optical Engineering XI; and Advances in Thin Film Coatings VI; 778604 (2010) https://doi.org/10.1117/12.860460
Event: SPIE Optical Engineering + Applications, 2010, San Diego, California, United States

Abstract

We have designed and fabricated angle-selective filters to increase the luminous throughput of a blue light emitting diode (LED) and its associated color wheel. The emission direction was tailored to increase the light emission in the useful direction by using multilayer optical coating with alternating high and low refractive indices layers. The angle selective filters limit the luminance angle to less than an acceptance angle of 30 degrees for green and red on the phosphors color wheel. The filters increase the luminance efficiency by converging and recycling the light. The color performance of the phosphors color wheel was improved and gave an advantage of energy saving in the LED projector.

Citation Download Citation

Tzu-Chiao Wei, Chien-Cheng Kuo, June-Jei Huang, and Cheng-Chung Lee "Research on angle-selective filters of phosphor color wheel for LED projectors", Proc. SPIE 7786, Current Developments in Lens Design and Optical Engineering XI; and Advances in Thin Film Coatings VI, 778604 (19 August 2010); https://doi.org/10.1117/12.860460

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