近年來發光二極體LED照明被大力提倡，但是LED的指向性很強，如果直接拿來照明，對人眼會造成眩光的不適感。為了加速取代傳統燈具，我們設計的燈具須具備傳統燈具的特性，諸如發光強度或是幾何結構等等。本論文使用一根散射導光柱將點光源變成線光源來取代檯燈螢光燈管，導光柱的表面將會鍍上一層具散射及反射特性的網點，此網點會改變LED原本朗伯的配光曲線，使光線均勻的從導光柱下方出光。 我們分析LED各角度的能量，並根據幾何光學的原理來調整網點分配的比例，以達到最佳化的均勻照明。最後，我們參考日本JIS C 8112規定的檯燈規範來設計反射罩並分析散射導光柱取代傳統螢光燈管的可行性。

The recent increase in environmental awareness has focused on Light Emitting Diodes (LED) lighting; however, LED has strong directionality, and when used for direct illumination, it will produce an uncomfortable glare for the human eye. In order to replace traditional lamps, the lighting portion should have similar characteristics to traditional lamps, such as intensity distribution and geometric parameters of traditional sources. This study used a scattering light pipe to transform a quasi-point source into an extended light source to replace fluorescent tubes. The light pipe was coated with scattering patterns, which could change the Lambertian intensity distribution of LED, and scatter light out from the bottom of the light pipe. The energy of LED was analyzed from all angles, and the scattering ratio of the dot patterns was adjusted based on principle of geometrical optics to achieve the best uniformity of illumination. Finally, we refer to the standard of desk lamp in JIS C 8112 to design reflectors for scattering light pipe and analyse the possibility of replacing traditional fluorescent tubes.

[1]J. F. Van Derlofske, “Computer modeling of LED light pipe systems for uniform display illumination,” Proc. SPIE 4445,119-129 (2001).

[2]F. Zhao, J. V. Derlofske, “Side-Emitting Illuminators Using LED Sources,” Proc. SPIE, 5186, 33-43 (2003).

[3]OSRAM，http://www.osram.com/

[4]「背光模組簡介」，國立交通大學-顯示系統實驗室
http://osdlab.eic.nctu.edu.tw/osdlab/chinese/DOWNLOAD/download.htm

[5]「導光膜(LGF) 」，富士高分子
http://www.fujipoly.co.jp/taiwan/products/other_04/index.htm

[6]陳亨哲，「導光管用於投影機之照明系統的創新設計」，國立台灣科技大學電子工程研究所，碩士論文，民國九十五年。

[7]謝昇良，「楔型導光管之照明系統應用與設計」，國立台灣科技大學電子工程研究所，碩士論文，民國九十五年。

[8]光度學名詞定義 http://www.docin.com/p-8755529.html

[9]Agilent Technologies, Light Guide Techniques Using LED Lamps (Application Brief I-003)

[10]Yi-Kai Cheng, and Jyh-Long Chern, “Irradiance formations in hollow straight light pipes with square and circular shapes”, Optical Society of America, 23, 427-434(2006)

[11]吳宜甄，「擴散板對LED混光影響之研究」，私立南台科技大學電機工程研究所，碩士論文，民國九十六年。

[12]Lambda Research，TracePro User’s Manual-Release3.3

[13]訊技科技，TracePro快速學習手冊，五南圖書出版股份有限公司，2009年

[14]J.E. Harvey, “Light-scattering characteristics of optical surfaces,” PhD Dissertation, The University of Arizona (1976).

[15]「雙向散射分佈函數」，維基百科，http://en.wikipedia.org/wiki/BSDF

[16]J. M. Teijido, H. P. Herzig, and R. Dandliker, “Design of a non-conventional illumination system using a scattering light pipe”, Proc. SPIE 2774, 747-756 (1996).

[17]J. M. Teijido, H. P. Herzig, R. Dndliker, J. Grupp, "Illumination light pipe using micro-optics as diffuser", Proc. SPIE 2951, 146-155 (1996).

[18]J. M. Teijido, H. P. Herzig, C. Fuhrer, P. J. Evard, " Design methods for illumination light pipes", Proc. SPIE 3428, 34-44 (1998)

[19] Zong-Yi Lee, Yi-Yung Chen, and Allen Jong-Woei Whang, “Design and optimization of dot pattern in illumination lightpipe of natural light guiding system”, Proc. SPIE 7429, 74290A (2009)

[20] 簡瑋廷，「高功率發光二極體應用於導光元件之研究」，國立中央大學光電科 學研究所，碩士論文，民國九十五年。

[21]「光卓上（勉書用）」，日本工業規格，JIS C 8112

[22]「照度標準」，經濟部標準檢驗局，CNS 12112