本研究探討應用於13吋液晶顯示器之背光模組更新設計。研究以設計一款較薄、較亮且均勻度較高的背光模組為目標。關鍵的構想是改變光源組件及導光板的設計。新設計是以壓克力為導光板的材質並且在導光板的底面置入微菱鏡結構，藉此取代反射片及菱鏡片以減少背光模組的厚度。為了減少設計過程所需的時間，研究中利用田口方法來決定新設計的幾何參數。
新型導光板設計的規格參考自相關專利。在實驗設計中最初選取五個控制因子並給予每個控制因子三個水準值進行評比，並藉由對應之電腦模型所得到光強度和均勻度的量測資料來評估背光模組樣本的性能。根據變異數分析，發現導光板楔型角對於背光模組的品質有顯著的影響。在經過數階段的搜尋，最後得到的背光模組設計均勻度達到商業產品的規格需求。

This thesis discusses the process to design a new backlight unit for 13” liquid crystal displays. A thinner, brighter but more uniform product is the objective of the study. Among the components composed of a backlight unit, the light guide plate and the light source subassembly are redesigned so that the thickness of a backlight unit can be reduced by removing the reflective sheet and the prism sheets. The new light guide plate is made of methylmethacrylate and micro-prism structures are embedded on its lower surface. In order to accelerate the design process, the Taguchi method is used to determine geometrical parameters of the new design.
The study of the new light guide plate began from a reference patent. Five control factors with three different levels were initially assigned in the experimental design. Tentative trails are examined through computer models. The performances of optic devices are evaluated by the measurements of light intensity and uniformity. Based on analysis of variance, the wedge angle of the light guide plate has been identified to have a significant impact to its quality. After a number of iterations, the final design obtained has uniformity over than 85 percents which satisfies the requirement of commercial products.

【1】Hsin-Ming Chen, Hsien-Wen Chang, Ming-Hsuan Liu, and Wei-Zung Cheng, Optimization af TFT-LCD Light Source by Ray Tracing and Thermo-flow Application, InnoLux Display Co., Taiwan, 2005.
【2】Kalantar Kalil, Matsumoto Shingo, and Onishi Tomohisa, Functional Light-Guide Plate Characterized by Optical Micro-Deflector and Micro-Reflector for LCD Backlight, IEICE Trans. Electron. E84-C 1637, 2001.
【3】Horibe Akihiro, Baba Masahiro, Nihei Eisuke, and Koike Yasuhiro, High-efficiency and High-quality LCD Backlight Using Highly Scattering Optical Transmission Polymer, IEICE Trans. Electron. E81-C 1697, 1998.
【4】Tagaya Akihiro, Nagai Michio, Koike Yasuhiro, and Yokoyama Kazuaki, Thin Liquid-crystal Display Backlight System with Highly Scattering Optical Transmission Polymers, Applied Optics 40 6274, 2001.
【5】Takamitsu Okumura, Akihiro Tagaya, Yasuhiro Koike, Masahiro Horiguchi, and Hiromasa Suzuki, Highly-efficient Backlight for Liquid Crystal Display Having No Optical Films, Applied Physics Letters 83 2515, 2003.
【6】Di Feng, Guofan Jin, Yingbai Yan, and Shoushan Fan, High Quality Light Guide Plates That Can Control the Illumination Angle Based on Microprism Structures, Applied Physics Letters 85 6016, 2004-December-13.
【7】Eugene Hecht, Optics(Fourth Edition), New York New York︰Addision Wesley, 2002.
【8】Harris Benson, University Physics, Taipei︰Eurasia, 1992.
【9】Yoshitaka Koyama, Ray-Tracing Simulation in LCD Development, IT Development Dept, TFT LCD Group, 2001-May-18.
【10】Phillip J. Ross, Taguchi Techniques for Quality Engineering (Second Edition), New York︰McGraw-Hill, 1996.
【11】高宏毅，LCD用高亮度導光板與散亂型聚合體導光板，EEDesign，2004-8-20。
【12】Joachim Reill, Light Guides Application Note, OSRAM Opto Semiconductors, 2002-April-25.
【13】背光模組產業發展現況與趨勢探討，產業情報知識網IEK，2002.8。
【14】王信陽，台灣背光模組產業現況及技術發展Roadmap，光連雙月刊第13期 p40-p44，2003-1。
【15】Frank Schieber, TRB 2000 Human Factors Workshop Photometry for Traffic Engineers, The University of South Dakota, http://www.usd.edu/~schieber/, 2000.
【16】王騰緯、鄧昭瑞，田口方法之研究與應用，國立台灣科技大學機械工程研究所，1994-6。
【17】Patows Gustavo, Pueyo Xavier, Vinacua Alvar, Reflector Design from Radiance Distributions, International Journal of Shape Modeling, volum10 page 211-235, 2004-December.
【18】Yu Bin Fang, and Chi-Chuan Hwang, The Optimization of Optical Design for LCD Backlight Module, Engineering Science National Cheng Kung University, 2004-July.