26 January 2004 Performance characteristics of white light sources consisting of multiple light-emitting diodes
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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.
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Yun-Li Li, Yun-Li Li, Jay M. Shah, Jay M. Shah, P.-H. Leung, P.-H. Leung, Thomas Gessmann, Thomas Gessmann, E. F. Schubert, 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); doi: 10.1117/12.512529; https://doi.org/10.1117/12.512529
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