高均匀度直下式LED平板灯设计  

Design of high uniform straight down LED panel light

作　　者：吴一新 孔剑虹 聂李迅 厉强 WU Yixin;KONG Jianhong;NIE Lixun;LI Qiang(Hengdian Group Tospo Lighting Co.,Ltd.,Dongyang 322118,China)

机构地区：[1]横店集团得邦照明股份有限公司,浙江东阳322118

出　　处：《中国计量大学学报》2021年第1期54-59,共6页Journal of China University of Metrology

基　　金：国家重点研发计划项目(No.2016YFB0400600,2017YFB0403700)。

摘　　要：目的:设计兼顾照明均匀度和厚度的直下式平板灯光学配光系统。方法:基于矢量折射反射定律和曲面微分几何原理,推导自由曲面的偏微分方程,并基于几何构型法的多自由曲面的数值构建方法,设计用于直下式LED平板灯的双自由曲面透镜。结果:将该透镜用于阵列照明,LED芯片间距为60 mm,数量降低9倍,在距高比为3∶1时实现大面积均匀照明平板灯的薄型化设计,照明均匀度达到93.4%。结论:平板灯的厚度下降为传统灯具的1/3,有效提高了直下式平板灯的性价比。Aims:This paper aims to design a light distribution system for straight-down flat both lighting uniformity and thickness.Methods:Based on the law of vector refraction reflection and the principle of surface differential geometry,the partial differential equation of free surface was derived.A numerical method for constructing multi-free surface based on the geometric configuration method was used to design a double free surface lens for straight down LED panel lights.Results:The lens was used for array lighting with an LED chip spacing of 60 mm and the number reduced by 9 times.When the ratio of distance to height is 3∶1,the thin design of large area uniform lighting flat lamp is realized,and the illumination uniformity reached 93.4%.Conclusions:The thickness of the flat lamp is reduced to 1/3 of the traditional lamp,which effectively improves the price-performance ratio of the straight down flat lamp.

关 键 词：光学设计 平板灯 自由曲面 均匀度 

分 类 号：O439[机械工程—光学工程]