照明工程学报2018，Vol.29Issue(1)：1-6,33,7.DOI:10.3969/j.issn.1004-440X.2018.01.001
LED白光芯片的光色一致性及光谱优化设计方法研究
The Optical and Color Consistency and Optimal Design of Spectrum Power Distribution for LED White Chips
摘要
Abstract
Based on the wafer level chip scale packaging technology,white light-emitting diode (LED) chip,with advantages on high efficacy,low thermal resistance and small size,has been considered as one of the most attractive technologies to manufacture the high quality full spectrum LED light sources and modules in the future.In this paper,the white LED chips with five illumination surfaces were prepared,then the influences of packaging materials and structure size on their optical and color consistency was investigated based on the spectrum power distribution analysis.The results indicate that:①the thickness of phosphor layer and the power output (PO) of LED chip have significant influence on the color consistency of LED white chips.Therefore,the precision of molding process and consistency of LED blue chip's PO should be strictly controlled during the manufacture;②he luminous efficacy of LED white chip was linearly dependent on its luminous efficacy of radiation (LER) and the photoelectric conversion efficiency of used LED blue chip (ΦB).The lower the correlated color temperature (CCT),the lower the coefficient of linear correlation.Finally,we developed an efficient and practical process to design phosphor mixture by optimizing the spectral power distribution,which can provide guidance on LED white chip design.关键词
LED/白光芯片/晶圆级芯片尺寸封装/光谱功率分布/光色一致性Key words
LED/white chip/wafer level chip scale package/spectral power distribution/optical and color consistency分类
通用工业技术引用本文复制引用
罗亮亮,樊嘉杰,经周,钱诚,樊学军,张国旗..LED白光芯片的光色一致性及光谱优化设计方法研究[J].照明工程学报,2018,29(1):1-6,33,7.基金项目
国家高技术研究发展计划(863计划)项目(2015AA033301),江苏省自然科学基金(青年项目)(BK20150249) （863计划）
