发光学报2017，Vol.38Issue(6)：820-827,8.DOI:10.3788/fgxb20173806.0820
一种预测白光LED相关色温的新方法
A New Method for Predicting Correlated Color Temperature of White LEDs
摘要
Abstract
In order to quickly determine the relationship between the correlated color temperature (CCT) of white LEDs and the corresponding yellow phosphor concentration, a method of 'intermediate parameter A' was proposed in this paper, which can reduce the workload, shorten the working time and improve the precision.First, the formula of the chromatic coordinate and the 'intermediate parameter A' was deduced by theoretical analysis.Then, six groups white LED samples with different yellow phosphor concentration were fabricated.After that, the 'A value' of each concentration was calculated.It is found that the relationship between the A value and the phosphor concentration is linear.The chromatic coordinates of the target CCT can be found on the chromaticity diagram, so the yellow phosphor concentration of the target CCT can be predicted by using this method.The experimental results show that the deviation between the CCT of white LED and the target CCT is less than 50 K by using this method.In the prediction of a high CCT, this method is more accurate by one order of magnitude than the method of 'direct exploration of the relationship between CCT and phosphor concentration'.And in predicting the phosphor concentration of a target CCT, the difference of phosphor concentration between the two groups of phosphor concentration samples and the six groups of samples is less than 0.5% by using this method.Therefore, the method of 'intermediate parameter A' has the advantages of short time, less workload and more accurate in determining the phosphor concentration of the white LED with target CCT.关键词
白光LED/相关色温/中间参数A/荧光粉浓度Key words
white LED/correlated color temperature/intermediate parameter A/phosphor concentration分类
数理科学引用本文复制引用
陈盛雄,朱大庆,廖欣怡..一种预测白光LED相关色温的新方法[J].发光学报,2017,38(6):820-827,8.基金项目
福建省光传输与变换重点实验室开放基金(KF2016201)资助项目 Supported by Open Fund of Key Laboratory of Optical Transmission and Transformation of Fujian Province (KF2016201) （KF2016201）
