6 February 2012 Multispectral mixing scheme for smart LED-based lighting system
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LED cluster is probably the most relevant among the emerging solid-state lighting techniques. Impressive scenarios of a wide range of color quality and luminous efficiency have been obtained, mostly at the condition of constant ambient temperature. This paper removes the constraint in ambient temperature. We present a methodology analogous to a general lens design rule to optimize step-by-step the spectral power distribution of a white-light LED cluster. The scheme enables the users to determine the optimal operation to meet requirements such as light efficiency, color quality, or other figures of merit over a wide range of color temperatures. All main factors influencing the spectral power distribution (SPD) are discussed, alongside the implementation of a pentachromatic R/G/B/A/CW platform suitable for clinic use. The result shows the multispectral cluster can be modulated within the color temperature from 2800K to 8000K in the range ambient temperature (10°C ~ 100°C) with high color quality scale (CQS > 85 points) and the possibly highest luminous efficiency.
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Song-Bor Chiang, Song-Bor Chiang, Ming-Chin Chien, Ming-Chin Chien, Chung-Hao Tien, Chung-Hao Tien, } "Multispectral mixing scheme for smart LED-based lighting system", Proc. SPIE 8278, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVI, 82780D (6 February 2012); doi: 10.1117/12.907834; https://doi.org/10.1117/12.907834

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