Work

A multi-functional nine channels full-spectrum light emitting diode color temperature palette

Year: 2025

Type: article

Abstract: A multi-functional nine-channel full-spectrum light emitting diode color temperature palette is proposed. The color temperature (CCT) of the palette can be continuously tuned at 1K interval within the range of 2500K-6500K. A high color rendering index (CRI) is achieved, with Ra > 94 and R1-R15 > 90. A fidelity index (Rf) greater than 91 is obtained, and the gamut index (Rg) within the range of 96 ≤ Rg ≤ 104 is achieved. Additionally, A chromaticity deviation (Duv) within the range of |Duv| < 0.001 is realized. The circadian effect with melanopic efficacy of luminous radiation(MELR) of 0.6 mW/lm-1.14 mW/lm and circadian action factor(CAF) of 0.289 blm/lm-0.656 blm/lm are obtained. To verify the theoretical model's stability, the Gaussian distribution function of monochromatic LED spectrum is adjusted to induce a 5% asymmetry in integral areas, and the FWHM is offset by ±10%, simulating the non-ideal conditions in practical applications to assess the model's robustness. The color temperature palette enables precise control and reproduction of CCT of sunlight with corresponding circadian effect, which is of positive significance for visual fields such as photography or art exhibitions and regulation of circadian rhythm.

Source: PLoS ONE

DOI: 10.1371/journal.pone.0327723

Authors: Jingjing Liang, Hui Cao, Donghua Xu, Xiaobing Lu, Feijiang Huang, Javid Atai

Institutions: Guangzhou University, Guangzhou Maritime College, Guangzhou Medical University, The University of Sydney

Language: English

Topic: Color Science and Applications

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,382

Funders: Department of Education of Guangdong Province, Bureau of Education of Guangzhou Municipality