- 學位論文
背光模組之新型多功能光學膜片之設計
Systematic Design of Novel Multi-Functional Optical Film for the Backlight Module
摘要
本研究運用TracePro光學設計模擬軟體，以及系統化的設計與最佳化流程，成功地設計出一種用於背光模組的新型多功能光學膜片。 此系統化的設計與最佳化流程，根據設定的變數不同而分為三個設計階段，依序分別為：整體設計、粗略分區設計與細部分區設計。經由這三個設計階段，逐步將此光學膜片的上表面劃分為多個區域。其中，針對不同區域而設計了不同的頂角與不同的排列方向的V型溝槽微結構；但若是同一個區域內，則其V型溝槽的頂角與排列方式都會相同。 為了量化評估背光模組在正面視角的發光亮度，本研究提出一個新的光學性能指標為有效光通量。 透過模擬結果，並用本研究提出的光學性能指標進行分析之後，本研究已經證實：若將所設計的最佳化光學膜片設置於一種經過設計的2.8吋側光式背光模組正上方時，則確實能顯著地使整體背光模組的光照度均齊度達到90.16%，與將正面視角的光亮度提升到1.09倍。 因此，將本研究所提出之新型多功能光學膜片運用於此背光模組時，的確能同時具備增亮膜和擴散片之功能，亦可使液晶顯示器更輕、更薄、更低耗能、更環保、與製造成本更低，從而增加商業競爭力。
並列摘要
For the backlight module(BLM), in this thesis, we successfully propose a novel multi-functional optical film based on the systematic process of design and optimization by using the simulation software of optical design, TracePro. Due to the different variables, the systematic process of design and optimization is divided into three stages: whole design, rough partition design and detailed partition design, consequently. In the three stages, we divided the optical film into 1, 5 or 13 zones, consequently. And, we construct many kinds of microstructures of V-grooves closely on the upper surface of the optical film based the different zones. Where, on the different zones, the apex angles and arrangement orientations of V-grooves may be different. But, on the same zone, the apex angles and arrangement orientations of V-grooves must be the same. For quantitative evaluation of brightness in the front viewing angles, we also propose a new index of optical performance, effective luminous flux. By analyzing the simulation result, we have confirmed that putting the novel optical film above a kind of 2.8 inch backlight module can enhance not only uniformity of illuminance up to 90.16% but also brightness in the front viewing angles up to 1.09 times. Therefore, when applying just one the novel optical film with the backlight module, just one the novel optical film indeed integrate brightness enhancement films with diffuser sheets. Accordingly, the novel multi-functional optical film we proposed will make a liquid crystal display(LCD) thinner, lighter weight, lower power consumption, more eco-friendly, lower manufacturing costs, and more business competitiveness.