本文針對背光模組零組件中的增亮膜進行專利資料搜索與分析。經由專利分析及文獻參考了解，目前使用在液晶顯示器背光模組的增亮膜大部分是採用雙層增亮膜架構，又以3M公司的增亮膜結構最普遍使用，但是這種擺設方式會增加背光模組的厚度和材料成本及材料吸收和全反射。為了改善其缺點，本文建構了單層角錐稜鏡結構的增亮膜，以TracePro軟體進行模擬並探討參數變異之影響，首先建構了角錐和圓錐的結構，兩種結構的最大軸向光強值都在45度，但是角錐有較大的軸向光強值；第二項模擬為改變角錐和圓錐的排列方式進行模擬，模擬結果為一般排列方式比交錯排列方式效果好；接著改變增亮膜底層基材和稜鏡的折射率，發現底層基材的折射率的大小對於光強值的影響大約在1 %以內，相較於稜鏡折射率變化時，光強值的改變幅度可以超過6%，其變化幅度顯得微小許多，而當稜鏡折射率從1.49提升到1.58時，可以讓軸向光強值達到雙層BEF片的效果，當折射率繼續上升到1.68時，軸向光強值已經超越雙層BEF片的光強值約10 %。由模擬數據可知角錐結構增亮膜可以使用在入射光源較為均勻的背光模組，例如直下式LED背光模組，軸向光強和聚光效果比使用單層增亮膜佳，雖然與雙層增亮膜的軸向光強值差距有6%，但是可以利用提升稜鏡折射率來彌補差距。利用加入擴散膜，或是進行導光板設計來改善背光模組的出光效果，將是後續的研究部分。

In this paper, we search the patents correlating with BEF (brightness enhancement film) in backlight module. We implement the patent analysis to understand the technological characteristic and gradual progress after patents survey. After analyzing, we understand that most current structures used in LCD backlight are based on double-layer BEFs, and 3M’s BEF has the lion’s share. But this technology may increase the thickness and cost of backlight module. Further more, it also cause light absorption by extra material (i.e., the second layer).In order to avoid these disadvantages, we design single-layer BEF and discuss the effect due to parameter(s) variation by simulation using the TracePro software. Firstly, we construct prisms and cones of BEF, both of them have the maximum axial luminous intensity at 45 degrees, but prismatic structure has greater axial luminous intensity than cone structure. Secondly, we construct different arrangements of prism and cone of BEF, and we find that the normal arrangement of prism has greater axial luminous intensity than the crossed arrangement. Finally, we change the refractive index of substrate and prism. The effect of luminous intensity to the refractive index of substrate is under 1%, corresponding to the prismatic refractive index is over 6%. So, the effect of the refractive index of substrate seems not so obvious. When the refractive index increases from 1.49 to 1.58, its luminous intensity can achieve the same intensity as the double-layer BEF does. When the refractive index increases to 1.68, the intensity of prismatic structure of BEF is 10% larger than that of double-layer BEF. We also apply the prismatic structure of BEF to four kinds of backlight modules. After simulating, we find that it has better performance to Bottom lighting module than Edge lighting module. Other parameters, such as adding diffuser sheet or optimum design of light guide, will further improve the performance of LCD backlight module, is our suggested further works.

1. 王惠珠, ”2001台灣產業生命力之新契機--平面顯示器產業”, 平面顯示器專輯 No.2, June. 2001.
2. 麥富德, 黃楓台, 簡國明, 王永銘, 陳秋燕, ”奈米碳管專利地圖及分析”, 行政院國家科學委員會科學技術資料中心, 台北, 2002.
3. 法務智權園地, “淺談專利地圖”, http://www.ccl.itri.org.tw/products/patent/84008.htm, 1995
4. 金美敬, ” 韓國利用專利地圖分析, 作為FPD產業技術政策新指標 ”, 工研院IEK-ITIS計畫, 2005.
5. 吳錦偉, ”智慧財產權是否可以實現迴避設計”, 中國電子報, Sep. 2005.
6. 許雅芬, ”論TFT LCD產業之專利挑戰與因應, 以Monitor Controller之專利爭訟為例”, 政治大學法律系碩士論文, 台北, 2004.
7. 科技產業研究室, “我國平面顯示器產業發展現況”, 經濟部電子報, Apr. 2005.
8. 拓墣產業研究所整理, http://www.topology.com.tw/TRI/default.asp, 2003.
9. 元富證券整理, http://www.masterlink.com.tw/securities/content.htm, 2004
10. 中華民國專利資訊網, http://www.twpat.com/webpat/
11. 張明義, ”背光模組產業概況”, 產業調查與技術第一四五期.
12. 陳鴻滄, 方育斌, ”LCD背光模組之產業趨勢、技術發展與設計方法”, 成功大學 ,2004.
13. 王信陽, “台灣背光模組產業現況及技術發展”, 光連第43期, 2003.
14. 3M網站, http://www.3M.com
15. 楊明仁,”LCD 背光模組產品介紹”, 台灣工業銀行, Sep. 2002.
16. 產業經濟與趨勢研究中心網站, http://www.iek.itri.org.tw/
17. 美國專利商標局網站, http://www.uspto.gov/
18. Holger, Ernst., ”Industrial research as a source of important patents”, Research Policy 27, pp. 1-15, 1998
19. D.J. Pristash and J.R. Parker, “Thin panel illuminator”, US Patent, No 5136480, August 1992.
20. S. Nakamura, A. Arimoto, K. Suzuki and K. Shibata, “Prism plate for efficiently emitting light flux within a predetermined range, and liquid crystal indicator and indicator illumination method using the same”, US Patent, No 5467417, November, 1995.
21. K.W. Beeson, S.M. Zimmerman and P.M. Ferm, “Backlighting apparatus employing an array of micro prisms”, US Patent, No 5396350, March, 1995.
22. S. Cobb, Jr., M.E. Gardiner, K.M. Kotchick, K. Toyooka and W.A. Hibbard, “Variable pitch structured optical film”, US Patent, No 5919551 July. 1999.
23. M.B. O'Neill and S. Cobb, Jr., “Brightness enhancement film with soft cutoff”, US Patent, No 5917664, June. 1999.
24. E. Higuchi and Y. Koike, ” Surface light source device and liquid crystal display”, US Patent, No 5887964, March. 1999.
25. S.C. Tang, ”Brightness enhancement film”, US Patent, No 6277471, August. 2001.
26. S.C. Tang, ” Uniform curved surface structure of a brightness unit for a brightness enhancement film”, US Patent, No 6759113, July. 2004.
27. H. Kojima, ” Backlight system for liquid crystal display comprising prism lens having apex angle of 80.degree.-85.degree. and refractive index of 1.57-1.59”, US Patent, No 6011601, January. 2000.
28. R. Winston, B.A. Jacobson, R.L. Holman and N.A. Gitkind, ”Tapered multilayer luminaire devices”, US Patent, No 5303322, April. 1994.
29. M.P. Bigwood., ”Patent Trend Analysis : Incorporate Current Year 90 Data”, World Patent Information, vol. 19, No4, pp. 243-249, 1997.
30. 趙凱華, 鍾錫華, “光學”, 儒林圖書有限公司, 台北, 1992.
31. 耿繼業, 何建娃, “幾何光學”, 全華科技圖書, 台北, 民92.
32. 鄒明智, 韓斌, 張力和, “中小尺寸之導光板設計與模擬”, 國立中興大學精密工程所, 台中, 2005.
33. 蔡耀葳, “LCD背光模組中稜鏡片之結構設計”, 中山大學碩士論文, 高雄, 2005.
34. 李季薇, 韓斌, 黃宏彥, “新世代大尺寸直下式LED背光模組之設計與模擬”, 國立中興大學精密工程研究所, 台中市.
35. 陳慶偉, 劉正舜, ”背光模組技術介紹”, 電子與材料第一期, 第104-107 頁, 1999.
36. 方育斌,”LCD背光模組之光學最佳化設計”,成功大學工程科學系碩士論文, 台南, 2003.
37. W.Y. Lee and T.K. Lim, “Fast ray-tracing methods for LCD backlight simulation using the characteristics of the pattern”, Optical Engineering January, vol. 44, pp. 136-701, Korea, 2005.
38. 方育斌, 張自恭, 林奇鋒, “高亮度背光模組設計”, 國家高速網路與計算中心, OPT’05, 桃園, 2005.
39. 楊明仁,” LCD 背光模組的光源-冷陰極螢光燈管介紹”, 台灣工業銀行, 2002.
40. 胡雁程, “液晶電視背光模組之光學設計”, 清華大學光電工程研究所碩士論文, 新竹, 2004.
41. 許一如, “17吋液晶顯示器側照式背光模組之光學設計”, 清華大學光電工程研究所碩士論文, 新竹, 2004.
42. Lumileds Lighting網站, http://www.lumileds.com.
43. Gerard Harbers, Wim Timmers and Willem Sillevis-Smitt, "LED backlighting for LCD HDTV", Proc. 2nd Intonation Display Manufacturing Conference pp.181-184, 2002.