显色指数
光学
发光效率
波长
材料科学
辐射
色温
色差
渲染(计算机图形)
发光二极管
物理
光电子学
电信
计算机科学
图层(电子)
GSM演进的增强数据速率
复合材料
作者
Fuzheng Zhang,Haisong Xu,Zhehong Wang
出处
期刊:Applied optics
[The Optical Society]
日期:2017-03-01
卷期号:56 (7): 1962-1962
被引量:26
摘要
The trade-off between the color fidelity index (Rf) released recently by the Illuminating Engineering Society of North America (IES) and luminous efficacy of radiation (LER) was investigated by adjusting the peak wavelengths, spectral widths, and intensities of four-channel LEDs utilizing a multiobjective optimization algorithm based on differential evolution in the correlated color temperature (CCT) ranging from 2800 to 6500 K for general lighting. The results indicate that Rf at a specific LER value decreases with the increasing CCT, and vice versa, and that Rf has significant improvements over the Commission Internationale de l'Eclairage (CIE) color rendering index (CRI) in avoiding spectral gaming and evaluating the light sources even with negative CIE general CRI (Ra). Further, the optimal peak wavelengths with regard to Rf were identified as 629 nm, 568 nm, 504 nm, and 447 nm, yielding high color rendering in terms of Rf(93∼94) and Ra(95∼97) and relatively excellent LER (299 lm/W∼339 lm/W) over a wide range of CCTs from 2800 to 6500 K. This suggests that Rf can be compatible with Ra, making it possible to obtain a common set of optimal peak wavelengths for Rf and Ra. Besides, the IES method could assess saturated red and skin tones more fairly than the CIE CRI. With a practical 17-channel LED array covering the resulted four optimal peak wavelengths, the improvements of the IES method over the CIE CRI were validated further.
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