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

XIE Hong-bo; LI Tao; LI Fu-lin; YANG Tong; HUANG Xun-song

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

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- Relationship between The Length and Emitted Light Property of Side-emitting Light Pipe in LED Back Light Source
- Chinese Journal of Luminescence Vol. 32, Issue 9, Pages: 934-938(2011)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN312.8;TM923.01
- Received：25 April 2011，
  
  Revised：2011-5-13，
  
  Published Online：22 September 2011，
  
  Published：22 September 2011
- 稿件说明：
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谢洪波, 李韬, 李富琳, 杨童, 黄训松. LED背光源中侧发光导光管长度与出光性能的关系[J]. 发光学报, 2011,32(9): 934-938

XIE Hong-bo, LI Tao, LI Fu-lin, YANG Tong, HUANG Xun-song. Relationship between The Length and Emitted Light Property of Side-emitting Light Pipe in LED Back Light Source[J]. Chinese Journal of Luminescence, 2011,32(9): 934-938
谢洪波, 李韬, 李富琳, 杨童, 黄训松. LED背光源中侧发光导光管长度与出光性能的关系[J]. 发光学报, 2011,32(9): 934-938 DOI：

XIE Hong-bo, LI Tao, LI Fu-lin, YANG Tong, HUANG Xun-song. Relationship between The Length and Emitted Light Property of Side-emitting Light Pipe in LED Back Light Source[J]. Chinese Journal of Luminescence, 2011,32(9): 934-938 DOI：

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

并找到导光管长度与

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。

Abstract

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

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.

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references

Huo Yanming, Wu Shumei. The research and simulation of LED arrays in lighting [J]. Chin. J. Lumin. (发光学报), 2009, 30 (4):436-440 (in Chenese).[2] Zang Jingfeng, Piao Yan, Song Zhengxun, et al. Indoor visible-light communication system based on white LED [J]. Chin. J. Lumin. (发光学报), 2009, 30 (6):877-881 (in Chinese).[3] Xie Hongbo, Yu Honglang, Gong Renmin, et al. Design and research on tricolor micro-optical guidepipe used in backlight module [J]. Laser & Optoelectronics Progress (激光与光电子学进展), 2011, 48 (2):023102-1-4 (in Chinese).[4] Cheng Yikai. Irradiance formations in hollow straight lightpipes with square and circular shapes [J]. Optics and Image Science, 2006, 23 (2):427-434.[5] Zhou Li, Tu Qifei, ZhuMinghua, et al. The technology of side-emitting guidepipe [J]. Chin. Illumin. Engin. J. (照明工程学报), 2007, 18 (3):16-18 (in Chinese).

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