XU Guang-qiang, YU Hui-yuan, ZHANG Jing-hui etc. Solar Spectrum Matching Based on White LED Compensated with Monochromatic LEDs[J]. Chinese Journal of Luminescence, 2017,38(8): 1117-1124
XU Guang-qiang, YU Hui-yuan, ZHANG Jing-hui etc. Solar Spectrum Matching Based on White LED Compensated with Monochromatic LEDs[J]. Chinese Journal of Luminescence, 2017,38(8): 1117-1124 DOI: 10.3788/fgxb20173808.1117.
Solar Spectrum Matching Based on White LED Compensated with Monochromatic LEDs
A method based on white LED compensated with monochromatic LEDs was proposed to realize the spectrum matching of solar spectrum in the visible range. The market of high-power monochromatic LEDs was researched and the model of joint-density-of-state according to the characteristics of monochromatic LED spectrum was used as the mathematical model. A database was established with the model of joint-density-of-state. Different kinds of monochromatic LEDs combination were optimized to compensate with the white LED by solving non-negative least square solution of overdetermined equation. The reproduction of solar spectrum was achieved. The methods of white LED compensation and multiple monochromatic LEDs spectral assembly were compared and the fitting effect of different LED combination matching solar spectrum was analyzed. The results show that the method of white LED compensated with monochromatic LEDs optimizes the simulated solar spectrum with the fitting correlation index of 90.74%
better than the method of monochromatic LEDs spectral assembly. When the number of LED types decrease
the former has better effect in simulating solar spectrum. The experimental data can be instructive to realize the different degree of solar-like lighting by selecting suitable LEDs.
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references
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