一种预测白光LED相关色温的新方法
发布时间:2018-06-06 16:07
本文选题:白光LED + 相关色温 ; 参考:《发光学报》2017年06期
【摘要】:为了快速确定白光LED相关色温与黄色荧光粉浓度的关系,提出"中间参数A"的方法,以达到减少工作量,缩短工作时间,提高精度的目的。首先,通过理论分析推导出色品坐标与"中间参数A"的关系公式。然后,制备6组不同黄色荧光粉浓度的白光LED样品,计算出每个浓度对应的A值,拟合A值与荧光粉浓度的关系公式。在色品图上查找目标色温对应的色坐标,就可以利用"中间参数A"的方法预测目标色温对应的黄色荧光粉浓度。实验结果表明:利用"中间参数A"的方法生产的白光LED的色温与目标色温的误差在50 K以内。在预测高色温时,该方法比"直接探索色温与荧光粉浓度的关系"的方法的精度高一个数量级。而且利用该方法,采用2组不同荧光粉浓度样品相比于6组样品,在预测目标色温对应的荧光粉浓度时的相差量低于0.5%。因此,该方法具有耗时短、工作量少,精度高的优点。
[Abstract]:In order to quickly determine the relationship between the relative color temperature of white LED and the concentration of yellow phosphor, the method of "intermediate parameter A" is put forward in order to reduce the workload, shorten the working time and improve the precision. Firstly, the formula of the relationship between the coordinate of excellent product and the intermediate parameter A is deduced by theoretical analysis. Then, six groups of white LED samples with different concentrations of yellow phosphor were prepared, and the corresponding A value of each concentration was calculated, and the relationship between A value and phosphor concentration was fitted. By looking up the color coordinates of the target color temperature on the color map, the method of "intermediate parameter A" can be used to predict the yellow phosphor concentration corresponding to the target color temperature. The experimental results show that the error between the color temperature and the target color temperature of the white LED produced by the method of "intermediate parameter A" is less than 50 K. In predicting high color temperature, the accuracy of this method is one order of magnitude higher than that of "directly exploring the relationship between color temperature and phosphor concentration". By using this method, the difference between two groups of samples with different phosphor concentration is less than 0.5 when the concentration of phosphor corresponding to the target color temperature is predicted compared with 6 groups of samples. Therefore, this method has the advantages of short time consuming, less workload and high precision.
【作者单位】: 华侨大学信息科学与工程学院;福建省光传输与变换重点实验室;
【基金】:福建省光传输与变换重点实验室开放基金(KF2016201)资助项目~~
【分类号】:TN312.8
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