LED背光源中侧发光导光管长度与出光性能的关系  

Relationship between The Length and Emitted Light Property of Side-emitting Light Pipe in LED Back Light Source

作　　者：谢洪波[1] 李韬[1] 李富琳[1] 杨童[1] 黄训松 

机构地区：[1]天津大学光电信息科学技术教育部重点实验室,天津300072 [2]福建上润电子有限公司,福建福州350015

出　　处：《发光学报》2011年第9期934-938,共5页Chinese Journal of Luminescence

基　　金：新型LED背光源关键技术研究资助项目

摘　　要：微细侧发光导光管可以将LED点光源转化成线光源。为了同时发挥LED光源和CCFL光源的优势,本文对导光管模型进行了改进,使不同长度导光管均能满足良好的出光性能。在网点公式基础上引入非线性修正参数α,并找到导光管长度与α的对应关系,得到不同长度导光管的优化网点排布形式。针对较短导光管光能利用率偏低的问题,采用导光管一端入光,另一端镀反射膜的方法,可显著提高光能利用率。模拟结果表明,该类导光管光能利用率达到63%以上,亮度均匀性达到93%以上,可应用于大中型尺寸的液晶背光模组中。Micro-optical side-emitting light pipe can transform LED light from point source to linear source and it has the advantages of both LED and CCFL when used in LCD backlight module.In order to achieve good performance of light pipes with different lengths,this article,improves the light pipe model and introduces nonlinear correcting parameter α based on scattering netted dots formula,then the optimized dots arrangement of the light pipes with different lengths is presented.To solve the problem of low utilization efficiency in short light pipes,we radiate the light into one end of the pipe with the other end coated with reflective film,which significantly improves the light utilization efficiency.The results of simulation experiments show that the light utilization efficiency of the pipe can reach to 63% and the uniformity is up to 93%.This kind of light pipe can be used in LCD backlight module of large and medium sizes screen.

关 键 词：导光管 网点排布 光能利用率 均匀性 

分 类 号：TN312.8[电子电信—物理电子学] TM923.01[电气工程—电力电子与电力传动]