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Proceedings Article

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

[+] Author Affiliations
Yun-Li Li, Jay M. Shah, P.-H. Leung, Thomas Gessmann, E. F. Schubert

Rensselaer Polytechnic Institute (United States)

Proc. SPIE 5187, Third International Conference on Solid State Lighting, 178 (January 26, 2004); doi:10.1117/12.512529
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From Conference Volume 5187

  • Third International Conference on Solid State Lighting
  • Ian T. Ferguson; Nadarajah Narendran; Steven P. DenBaars; John C. Carrano
  • San Diego, California, USA | August 03, 2003

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.

© (2004) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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, 178 (January 26, 2004); doi:10.1117/12.512529; http://dx.doi.org/10.1117/12.512529


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