Optical Analysis of Color Distribution in White LEDs With Various Packaging Methods
Optical Analysis of Color Distribution in White LEDs With Various Packaging Methods
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各种封装方法的白光 LED 颜色分布的光学分析
DOI：
10.1109/lpt.2008.2005998
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发表时间：
2008-11-01
影响因子：
2.6
通讯作者：
Luo, Xiaobing
中科院分区：
文献类型：
--
作者：
Liu, Zongyuan;Liu, Sheng;Luo, Xiaobing
均匀的颜色分布对于发光二极管（LED）的封装至关重要。采用蒙特卡罗光线追迹法分析了白色LED的颜色分布。五种封装方法进行了研究，荧光层的位置是不同的。结果表明，封装方式是影响颜色分布的主要因素，无反射器封装方式具有较好的颜色均匀性。位置或磷光体对颜色均匀性具有小的影响，但是远程位置（如果太远）可以显著降低均匀性。颜色均匀性的降低可超过88%。
Uniform color distribution is essential for the packaging of light emitting diodes (LEDs). The Monte Carlo ray tracing method is applied to analyze the color distribution of white LEDs. Five packaging methods are investigated and the location of phosphor layer is varied. Results reveal that the packaging method is the primary factor affecting the color distribution and a nonreflector packaging method presents better color uniformity. The location or phosphor has a small impact on the color uniformity but remote location, if too far, can reduce the uniformity significantly. The reduction of color uniformity may exceed 88%.