摘要
随着发光二极管的飞速发展,LED照明越来越多的被用于各个行业,且类似医疗、印刷、纺织、美容等行业对LED灯具的颜色表现能力要求很高;同时LED灯具带来的光生物危害也越来越被人们所重视,其中以LED蓝光危害最被人们所熟知。近年来很多研究者致力于如何降低白光LED的蓝光危害,但大部分工作都是在相对较低色温(CCT)的情况下获得需要的白光光谱,或者在一段色温范围内对进行离散穷举来找出最低蓝光危害的那一个相关色温对应的光谱;能够在不同的目标色温下获得同时拥有高颜色表现能力与低蓝光危害辐射的混合白光LED光谱几乎没有。为此,基于现有的多个LED提出了一种目标函数简单的非线性约束优化方法。在以往的研究中发现蓝光危害加权辐射通量与其相关色温呈现线性关系,随着其相关色温的增大,蓝光加权辐射通量也越来越大。要想获得具有低蓝光危害的白光LED光谱,只需固定其相关色温,就会得到每个目标相关色温对应的蓝光加权辐射通量,根据评价LED光源的蓝光危害辐射效率的计算公式,将其分子固定,只需最大化其分母,其蓝光危害辐射效率就会最小化,所以最大化辐射效率即可。针对其光谱功率分布,通过使用一个滤光片对被选择的多个LED混合后的光谱功率分布进行限制,同时因为实际生产需求要对滤光片的光谱透射率添加一个平滑约束,平滑约束则是使用加权平均的方法来完成。最后通过极大化“RP”方法得到各色LED的辐射量权重。仿真结果证明,该方法最终可以获得符合美国国家标准学会的ANSI/NEMA C78.377-2017标准的2700~6500 K八个目标相关色温,分别为2700、3000、3500、4000、4500、5000、5700和6500 K,各个CCT下的光源光谱其显色指数、色彩保真度、色域指数均在90以上,色偏差值在0.0054以内,蓝光危害辐射效率均在0.1以内的混合LED白光光谱。
With the rapid development of light-emitting diodes,LED lighting technology is increasingly being used in various industries,and similar medical,printing,textile,beauty,and other industries require high color performance capability of LED lamps.Still,at the same time,the photobiological hazards brought about by LED lamps are also increasingly being paid attention to,among which is the LED blue light hazard,which is the most well-known.In recent years,many researchers have committed to reducing the blue light hazard of white LED.Still,most of them are in the case of low correlation color temperature to obtain the corresponding white light spectrum or through a section of the correlation color temperature range of the lowest blue light radiation efficiency of the correlation color temperature of the discrete exhaustive to find out the lowest blue light hazard of the spectra,can be obtained in different target correlation color temperature at the same time have a high color performance ability and low blue light radiation efficiency.The ability to obtain high color performance and low blue light hazard radiation efficiency at different target-relevant color temperatures of hybrid white LED spectra is almost non-existent.Based on the existing multiple LEDs,this paper proposes a nonlinear constrained optimization method with a simple objective function.Previous studies found that the blue light hazard-weighted radiant flux shows a linear relationship with its associated color temperature.As its associated color temperature increases,the blue light-weighted radiant flux also increases.Fix its relevant color temperature to obtain a white LED spectrum with low blue light hazard.You will get the blue light-weighted radiation flux corresponding to each target's relevant color temperature.According to the formula for evaluating the radiation efficiency of the blue light hazard of the LED light source,the numerator is fixed and only needs to maximize the denominator;the blue light hazard radiation efficiency will be minimize
作者
甄佳弘
王智峰
李长军
ZHEN Jia-hong;WANG Zhi-feng;LI Chang-jun(School of Computer and Software Engineering,University of Science and Technology Liaoning,Anshan 114051,China)
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2024年第8期2146-2151,共6页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(61575090,61775169)资助。
关键词
蓝光危害
LED光谱优化
光谱叠加
颜色表现能力
Blue light hazard
LED spectral optimization
Spectral superposition
Color expressiveness
