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- A. Žukauskas
- Institute of Materials Science and Applied Research, Vilnius University, Saulėtekio 9-III, 2040 Vilnius, Lithuania
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- R. Vaicekauskas
- Faculty of Mathematics and Information Science, Vilnius University, Naugarduko 24, 2006 Vilnius, Lithuania
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- F. Ivanauskas
- Faculty of Mathematics and Information Science, Vilnius University, Naugarduko 24, 2006 Vilnius, Lithuania
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- R. Gaska
- Department of Electrical, Computer, and Systems Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180
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- M. S. Shur
- Department of Electrical, Computer, and Systems Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180
書誌事項
- 公開日
- 2002-01-14
- DOI
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- 10.1063/1.1432107
- 公開者
- AIP Publishing
この論文をさがす
説明
<jats:p>A stochastic method of optimization of a white-light source that relies on additive color mixing of the emissions from colored light-emitting diodes (LEDs) was developed. The method allows for finding the optimal wavelengths of LEDs in order to obtain the best possible trade off between luminous efficacy and the general color rendering index (CRI) of the white source for an arbitrary number of primary LEDs. Optimal solid-state lamps composed of two, three, four, and five different LEDs were analyzed. We show that a dichromatic LED lamp can only provide high efficacy with a general CRI close to zero, whereas trichromatic and quadrichromatic lamps are able to cover the entire range of reasonable general CRI values. The optimization of quintichromatic LED lamps and lamps with a higher number of primary color LEDs yields a negligible benefit in improving CRI but provides for quasicontinuous spectra that might be required for special lighting needs.</jats:p>
収録刊行物
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- Applied Physics Letters
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Applied Physics Letters 80 (2), 234-236, 2002-01-14
AIP Publishing