Investigation on Circadian Action and Color Quality in Laser-Based Illuminant for General Lighting and Display

In this work, the genetic algorithm is employed to optimize both circadian action factor (CAF) and color quality of laser-based illuminants (LBIs) with three, four, and five spectral bands to disclose its possible use in two common white lighting applications, i.e. bedroom lighting and office lighti...

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Bibliographic Details
Published in:IEEE photonics journal 2020-08, Vol.12 (4), p.1-9
Main Authors: Lei, Shuo-Di, Liu, Bi-Jing, Gao, Yang, Dong, Xiao-Ya, Gong, Yu-Jia, Xu, Jian, Xu, Yun-Xin, Wang, Dong, Guo, Zi-Quan, Wu, Ting-Zhu, Zhou, Chen-Liang, Cai, Zong-Jian, Lu, Yi-Jun, Chen, Zhong
Format: Article
Language:English
Subjects:
Bedrooms
circadian action
Color
color quality
Color temperature
Genetic algorithms
Laser applications
Laser-based illuminant
Light emitting diodes
Lighting
Luminous efficacy
Optimization
Rendering
Rendering (computer graphics)
Solid state lighting
Spectral bands
White light
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Summary:In this work, the genetic algorithm is employed to optimize both circadian action factor (CAF) and color quality of laser-based illuminants (LBIs) with three, four, and five spectral bands to disclose its possible use in two common white lighting applications, i.e. bedroom lighting and office lighting. Comparing all LBIs at a correlated color temperature (CCT) of 3000 K and a color rendering index of 80, the CAF of four-band LBIs reaches a minimum of 0.238 and maintains at a possibly highest luminous efficacy of radiation (LER) of 422 lm/W among all cases. The performances of white LBIs are also compared with those of white light-emitting diodes (LEDs). The results demonstrate that, under the same conditions of color rendering and color temperature, both four-band LBIs and four-band LEDs exhibit the largest circadian tunability of about 4.7, while four-band LBIs possess much higher LER at the same time compared with four-band LEDs. In addition, for the display application, the investigation on the optimal circadian tunability as a function of color gamut at two CCTs (3000 K and 6500 K) is also performed. We believe that this study can serve as a useful guidance for the application of LBIs in both the healthy general lighting and display.
ISSN:1943-0655
1943-0655
1943-0647
DOI:10.1109/JPHOT.2020.3007529