发光学报, 2019, 40 (12): 1514, 网络出版: 2020-01-09
白光LED光谱特性及司辰节律因子
Spectral Characteristics and Circadian Action Factor of White LEDs
白光LED 功率预测 色温漂移 司辰节律因子 非视觉生物效应 white LEDs optical power prediction color temperature drift circadian action factor non-visual biological effects
摘要
为分析白光LED的光-电-热特性及其变化, 在热沉温度和驱动电流可控的条件下, 测试了温度、电流对白光LED光谱分布的影响, 建立了白光LED光功率和光谱蓝白比(蓝光光谱光功率与白光光谱光功率的比值)预测模型。相关性分析显示光谱蓝白比、色温及司辰节律因子之间高度相关, 光谱蓝白比与色温、光谱蓝白比与司辰节律因子均存在线性关系, 表明由光谱分布变化预测光谱色温漂移及其非视觉生物效应的可能性。实验结果表明, 白光LED光功率、蓝白比、色温及司辰节律因子的预测值与实测值吻合较好, 最大预测误差分别不超过4.22%、1.54%、1.31%和2.15%; 同时, 白光LED光谱蓝白比可作为一种有效手段, 用于预测光谱色温及司辰节律因子, 进而评估其光学特性和非视觉生物效应。
Abstract
To analyze the optical-electrical-thermal characteristics of white LEDs, effects of temperature and current on the spectral power distribution of the white LED were tested under the controllable heatsink temperature and current. On the basis, prediction models for spectral optical power and blue-white ratio (the ratio between blue optical power and white optical power) of the white LED were proposed. Correlation analysis proved that the blue-white ratio was highly correlated with the correlated color temperature (CCT) as well as circadian action factor (CAF). Moreover, linear relationships both exist between blue-white ratio and CCT, and between blue-white ratio and CAF. It indicates the possibility which qualitatively predicting color temperature drift and non-visual biological effects of the white spectrum from changing spectral power distribution. Experimental results show that, the maximum prediction errors of spectral optical power, blue-white ratio, CCT and CAF of the white LED were within 4.22%, 1.54%, 1.31% and 2.15%, respectively. Meanwhile, the spectral blue-white ratio can be used as an effective method to predict CCT and CAF of the spectrum, and thus to evaluate the spectral optical properties and non-visual biological effects.
沈雪华, 陈焕庭, 陈赐海, 林惠川, 李燕, 陈福昌. 白光LED光谱特性及司辰节律因子[J]. 发光学报, 2019, 40(12): 1514. SHEN Xue-hua, CHEN Huan-ting, CHEN Ci-hai, LIN Hui-chuang, LI Yan, CHEN Fu-chang. Spectral Characteristics and Circadian Action Factor of White LEDs[J]. Chinese Journal of Luminescence, 2019, 40(12): 1514.