Performance characteristics of white light sources consisting of multiple light-emitting diodes

Yun-Li Li; Jay M. Shah; P.-H. Leung; Thomas Gessmann; E. F. Schubert

doi:10.1117/12.512529

26 January 2004 Performance characteristics of white light sources consisting of multiple light-emitting diodes

Yun-Li Li, Jay M. Shah, P.-H. Leung, Thomas Gessmann, E. F. Schubert

Proceedings Volume 5187, Third International Conference on Solid State Lighting; (2004) https://doi.org/10.1117/12.512529
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

The performance characteristics of white light sources based on a multiple-LED approach, in particular dichromatic and trichromatic sources are analyzed in detail. Figures of merit such as the luminous efficacy, color temperature, and color rendering capabilities are provided for a wide range of primary emission wavelengths. Spectral power density functions of LEDs are assumed to be thermally and inhomogeneously broadened to a full width at half maximum of several kT, in agreement with experimental results. A gaussian line shape is assumed for each of the emission bands. It is shown that multi-LED white light sources have the potential for luminous efficacies greater than 400 lm/W (dichromatic source) and color rendering indices of greater than 90 (trichromatic source). Contour maps for the color rendering indices and luminous efficacies versus three wavelengths are given.

Citation Download Citation

Yun-Li Li, Jay M. Shah, P.-H. Leung, Thomas Gessmann, and E. F. Schubert "Performance characteristics of white light sources consisting of multiple light-emitting diodes", Proc. SPIE 5187, Third International Conference on Solid State Lighting, (26 January 2004); https://doi.org/10.1117/12.512529

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