輕薄型的攜帶式面板蓬勃發展，要能做到又輕又薄是目前市場的趨勢。本論文將提出薄型化軟性面板之光學複合膜研究，將以其中的背光模組為主軸，設計一新型LED (Light emitting diode；發光二極體) 側光式背光模組，將點光源由複合膜結構轉換為面光源出光，進而提升光取出效率。研究步驟以商業光學模擬軟體FRED對複合膜之微結構設計之光學效應進行探討，再以類LIGA (Lithographie galvanoformung abformung) 技術以THB-126N負光阻與AZ-4620正光阻製作不同深寬比及填充率之微透鏡結構模具。其中將提出多項創新製程進行研究，自製灰階光罩搭配微透鏡陣列以單一製程達到多重深寬比之微透鏡陣列結構。另以分段式微電鑄法改變微透鏡陣列尺寸及填充率呈現可變尺寸之微透鏡陣列結構。以此二方法製作第一模具，再翻製二次模具。以此兩種二次模具於翻製PDMS (Polydimethylsiloxane；聚二甲基矽氧烷) 光學複合膜同時，以微氣管加壓通入定量氣體，可使PDMS內含可控大小及選擇性分佈之微氣泡，有導光及擴散之功能。此創新製程不需基板即可快速一體成型，可得到無基板式內嵌氣泡擴散導光層與多重深寬比及可變尺寸微透鏡陣列複合光學膜片。最後以BM-7A彩色輝度計進行光學量測分析，此創新製程可改善輝度 (Luminance) 與發光面之均勻度 (Uniformity)，以減少LED顆數提供更高的發光效率，對薄型化面板產業有顯著的發展。

The development and application of portable LCD (Liquid crystal display) technology is the main trend on the market. The goal of this study is to fabricate a compound optical film, and we focus on the design and fabrication of a new type backlight module for side-LED (Light emitting diode) display. The optical efficiency can be improved via the compound optical film. The profile of optical film was determined using commercial optical software, FRED. The mold with multi aspect ratio and multi fill-factor microlens array by LIGA-like process (Lithographie galvanoformung abformung) was produced using THB-126N negative photoresist and AZ-4620 positive photoresist. The study presents many innovative processes, such as the homemade gray scale mask, and multi-step electroforming method, which both produces the microlens array with variable size and aspect ratio. In addition, the embedded micro-void caused light guide and diffusion under the quantitative control during the PDMS (Polydimethylsiloxane) optical film fabrication. The compound optical film with embedded micro-voids, multi aspect ratio and variable size microlens array can be fabricated quickly without substrate. Then the optical properties were analyzed by BM-7A to characterize the luminance, uniformity and optical efficiency.

論文審訂書........................................................i
誌謝...................................................................ii
摘要..................................................................iii
Abstract............................................................iv
目錄...................................................................v
圖次................................................................viii
表次.................................................................xii
第一章 緒論.....................................................1
1-1 研究背景與目的.......................................1
1-2 文獻回顧...................................................1
1-3 研究動機與目的.......................................4
1-4 論文架構...................................................4
第二章 製作原理.............................................6
2-1 背光模組基本架構...................................6
2-2 基本光學原理...........................................7
2-2-1 反射與折射...........................................7
2-2-2 光的穿透...............................................9
2-2-3 光度學.................................................10
2-3 光學量測.................................................10
2-3-1 九點量測.............................................10
2-3-2 均勻度計算.........................................11
2-4 球面微透鏡陣列設計理論.....................11
2-5 實驗製程理論.........................................12
2-5-1 LIGA製程.............................................12
2-5-2 軟微影..................................................13
2-5-3 灰階光罩..............................................14
2-5-4 電鑄技術..............................................15
2-6 兩種新型LIGA-like技術.........................16
2-6-1 灰階微透鏡陣列..................................16
2-6-2 分段式電鑄..........................................17
第三章 結構設計與分析................................18
3-1 設計複合式光學膜片..............................18
3-2 各元件結構..............................................19
3-3 參數配置..................................................20
3-3-1 光學模擬軟體簡介..............................20
3-3-2 FRED模擬軟體...................................20
3-3-3 模型建立..............................................21
3-3-4 模擬結果..............................................25
3-4 決定參數..................................................32
第四章 實驗方法與步驟................................33
4-1 灰階微透鏡陣列模具製作......................34
4-1-1 自製底片灰階光罩..............................34
4-1-2光學穿透率與表面輪廓量測...............35
4-1-3 灰階微透鏡陣列模具製程..................38
4-2 分段式填充微透鏡陣列模具製作..........41
4-2-1 黃光微影製程......................................41
4-2-2 分段式電鑄..........................................43
4-3 軟微影製程..............................................46
4-4 光學量測設置..........................................48
第五章 結果與討論........................................50
5-1 實驗結果..................................................50
5-1-1 灰階微透鏡陣列模具結果..................50
5-1-2 分段式填充微透鏡陣列模具結果......53
5-1-3 軟微影結果..........................................55
5-1-4 內嵌氣泡光學膜片結果......................59
5-2 光學量測結果..........................................60
5-3 量測結果與模擬值比較..........................63
第六章 結論與未來展望................................65
6-1 結論..........................................................65
6-2 未來展望..................................................65
參考文獻.........................................................66

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