液晶与显示2018，Vol.33Issue(4)：326-337,12.DOI:10.3788/YJYXS20183304.0326
实现白光LED阵列色温分布均匀化技术研究
Design of white LED array for uniform correlated color temperature distribution
摘要
Abstract
In this paper,an algorithm is proposed to design white LED array for uniform distribution of the correlated color temperature(CCT)on the target surface.The color temperature distribution of LED array on the target surface can be calculated by superposition of color temperature superposition from different LEDs in the array.A merit function is constructed which reflects the uniformity of CCT distribution.The value of the merit function depends on all LED positions.By optimizing all LED po-sitions,the merit function achieves the minimal value.When merit function achieves the minimal value,the uniformity of the CCT distribution will reaches the highest.By the method,two LED arrays are designed:(1)Square array consisting of 9 identical white LEDs(2)Circular array consis-ting of 16 white LEDs.After optimization,the two LED arrays both produce uniform CCT distribu-tion with a uniformity of higher 95%.In addition,we also design another LED array which controls the uniformity of irradiance and CCT distribution simultaneously by constructing a special evaluation function.By optimizing the configuration of the LED array,the uniformity of the CCT is increased from 78% to 88.7% and the uniformity of the irradiance distribution is increased from 42% to 87.6%. Finally,the influence of the CCT errors of LEDs on the uniformity is analyzed.The results show that the uniformity of LED array will decrease with the increasing of the CCT errors of each LED.Also the algorithm is still quite effective for designing the LED array in which each LED has different CCT error.关键词
照明工程/发光二极管阵列/色温/均匀化/评价函数Key words
illuminating engineering/LED array/color temperature/uniformity/merit function分类
数理科学引用本文复制引用
胡莹,苏宙平,曹晶辉..实现白光LED阵列色温分布均匀化技术研究[J].液晶与显示,2018,33(4):326-337,12.基金项目
国家自然科学基金(No.60908041) （No.60908041）
上海市全固态激光器与应用技术重点实验室开放课题(No.2012ADL03)Supported by National Natural Science Foundation of China(No.60908041) （No.2012ADL03）
Opening Project of Shanghai Key Laboratory of ALL Solid-State Laser and Applied Techniques(No.2012ADL03) （No.2012ADL03）
