光谱拟合反演法制备高显色指数白光LED的研究  

Preparation of High CRI White LEDs with Spectral Fitting Method

作　　者：李成驰 范广涵 郭光华[1] 陈志涛 刘宁炀 古志良 

机构地区：[1]中南大学物理与电子学院,长沙410012 [2]广东省工业技术研究院,广州510650

出　　处：《半导体光电》2015年第5期713-717,721,共6页Semiconductor Optoelectronics

基　　金：国家自然科学基金项目(11304048);广东省战略新兴产业LED专项资助项目(2010A081001001)

摘　　要：荧光粉受激发产生的白光LED照明光源存在显色指数较低的问题。对此提出一种利用光谱拟合反演高显指目标光谱的方法,针对已知白光LED计算提高该光源所需补充的单色光LED种类及光谱系数。利用光谱拟合方法分析添加不同波段的光谱对白光LED显指和色温的影响。并通过拟合反演的方法进行补光设计,使用一到两种单色光LED,将冷白光源和中性白光源的显指分别提高至92.3和96.8。实验结果表明,使用红光与蓝绿光、低波长绿光LED补光后,大幅度提高了荧光粉受激发产生的白光LED光源的显色性。CRI of LED white light sources realized by exciting phosphors is relatively low.An inversion method was supposed to improve the white LED CRI through fitting target spectrum of high CRI.Wavelength and spectral coefficients of monochromatic LEDs used to improve CRI of white sources were calculated.The effects on CRI and CCT of supplementary in different wavelength were analyzed.By using one or two kinds of monochromatic LEDs,CRI of a cool white LED and a neutral white LED were separately increased to 92.3and 96.8.The experimental results show that using white light and blue-green light or low-wavelength green light LEDs for supplementary can obviously increase the color rendering of white light LEDs.

关 键 词：发光二极管 光谱拟合 显色指数 反演法 色温 光视效能 

分 类 号：TN312.8[电子电信—物理电子学]