一种新颖的白光LED荧光粉测量系统和分析方法

摘要

为获得高效率的白光LED,得到荧光粉和芯片的最佳匹配,本文提出了一种新颖的白光LED荧光粉测量系统和分析方法.该方法根据荧光粉测量原理,采用单色光激发荧光粉,获得荧光粉的激发光谱特性.由单波长激发的光谱组合可以得到荧光粉的三维光谱特性,荧光粉光谱与LED芯片光谱匹配可以模拟白光LED光谱.分析了荧光粉在单波长及光谱激发条件下的效率.实验结果表明,该测量系统和分析方法可以确定荧光粉和兰光LED芯片的最佳匹配,从而为获得高效率白光LED奠定了良好的基础.%In order to achieve high-efficiency white LEDs and get the optimal matching between phosphors and LED chips,a novel moasuremcnt system and an analytical method for white LED phosphors were proposed.According to the measurement principles of phosphor,monochromatic light was adopted to excite the phosphor,and phosphors'excitation characteristics were obtained.With each single excitation spectrums,three-dimeusional spectral power distribution for a phosphor was achieved,and the spectrum ofwhite LED was acquired by combination with the spectrum of blue LED chip.Luminous efficiencies of the phosphor under different excitation conditions were analyzed.The experimental results show that the measurement systemand analytical method are feasible for choosing optimalmatching between phosphors and LED chips,and Can establish a good foundation for achieving high-efficiency white LED.