- 學位論文
聚甲基丙烯酸甲酯poly(methyl methacrylate) 導光板光學效果增益之研究
poly(methyl methacrylate)Light guide plate brightness add of study
摘要
因近年來背光模組隨光源LED發光效率及節能議題下使面板更為輕薄，除模組厚度變薄外因側光源關係使得導光板的研究愈來愈多元，包含導光板網點設計、網點型狀、網點排列、導光板厚度、導光板表面結構..等，本篇研究針對導光板本身材料及添加微顆粒之折射率來探討導光板的輝度增益及光線分佈於導光板內的均勻度表現。 基材材料以聚甲基丙烯酸甲酯(PMMA)為主，添加劑選定不同折射率微顆粒材料在特定的濃度及粒徑下，比較單側光源的光線在導光板內部的輝度表現及整體光線均齊度。 另外由於聚甲基丙烯酸甲酯(PMMA)材料本身吸水率含量高，在光引導板生產製程及印刷網點製程，易發生板翹而影響背光模組廠製程良率，實驗中比較添加微顆粒後吸水率(%)及飽和吸水率(%)關係。 研究結果顯示微顆粒添加劑材料以聚苯乙烯PS(Polystyrene)粒徑約2~3um，在本研究裡利用微顆粒添加劑添加於導光板內輝度增益達22%，光線均齊度提升27%折射率差異在0.1，有助於提升導光板取光效率。
並列摘要
In recent years,back light module follows the topic of LED luminous efficiency and energy saving to make the panel more lighter and thinness. Besides the thinner panel,light along with edge light mark sun-reflect device research more and more diversification,including sun-reflect device dot design,dot shape,dot rank,thickness and surface texture,,etc. This research aims at the refraction index of sun-reflect Device intrinsic material and bead added to discuss the devices luminance promotion,light distribution ,and uniformity expression in inner device, The material is based on PMMA,additive is chosed from different refraction indexmi cro-texture in specific concentraction and p articale size,compared with luminance expression and integral light uniformity of edge light in inner device. Besides,owing to the high containment of absorption water ratio from the material of PMMA itself, during the manufacturing process of light guide plate and the process of printing dots,It is easy to occur plates warped to affect the yield rate of the manufacturing process of the back light module factories, The experiment compared the relation between the absorption water ratio with bead added and the saturated absorption water ratio.Researches reveal the material of baed additive is based on PS, the particle size ranges from 2um to 3um,by adding the bead additive in light guide plates in this research,luminance promotion is 22%,light uniformity promotes 27%,the difference of refraction index is 0.1,it helps promote the light absorption efficiency of light guide plates.