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Open AccessArticle

Spectral Optimization of White LED Based on Mesopic Luminance and Color Gamut Volume for Dim Lighting Conditions

1
Research Center for Information Technology Innovation, Academia Sinica, Taipei 11529, Taiwan
2
Graduate Institute of Color and Illumination Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
3
State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310058, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(10), 3579; https://doi.org/10.3390/app10103579
Received: 5 May 2020 / Revised: 18 May 2020 / Accepted: 20 May 2020 / Published: 21 May 2020
(This article belongs to the Special Issue Joint Special Issue With OPTIC 2019)
The study aims to propose an approach of white LED spectral optimization based on mesopic luminance and color gamut volume for dim lighting conditions. Three optimal white LED spectra with relatively higher mesopic luminance and color gamut volume, the highest mesopic luminance, and the largest gamut volume are recommended for reducing energy consumption and enhancing color perception and recognition of human eyes. The theoretical simulation shows that the spectra with higher correlated color temperatures (CCT) and S/P-ratio increase the mesopic luminance and also extend the range of color gamut with the decreasing of lighting level. An evaluation model is developed to faster predict mesopic luminance, color gamut volume, and S/P ratio for lighting applications. View Full-Text
Keywords: white light-emitting diodes; mesopic vision; spectral optimization; color gamut estimation white light-emitting diodes; mesopic vision; spectral optimization; color gamut estimation
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MDPI and ACS Style

Li, H.-C.; Sun, P.-L.; Huang, Y.; Luo, M.R. Spectral Optimization of White LED Based on Mesopic Luminance and Color Gamut Volume for Dim Lighting Conditions. Appl. Sci. 2020, 10, 3579.

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