臺灣博碩士論文加值系統

本論文研究目的為利用光配向技術發展新式垂直配向模式之液晶元件。此液晶元件利用負型液晶、2種壓克力單體以及光起始劑調配出的垂直配向液晶（Vertical Alignment Liqid Crystal, VALC），經由UV光照射後而產生相分離而具有垂直配向的上下層薄膜，對於一般需塗佈配向劑和摩擦配向的製程省略，為其優點。此外，也探討對於此模式(VA mode)下，液晶分子對不同UV光照射時間下的光穿透度、對比度以及反應時間等光電特性。

The purpose of this study is using photoaligment to develop a method for new type vertical alignment of liquid crystal device. The Vertical Alignment Liqid Crystal (VALC) is achieved by mixing N-typeliquid crystal and two kinds of acrylic monomer and photoinitiator. There are upperand lower bilayer of vertical alignment films by UV irradiation, at which the phase separation is carried out, thus, the advantage is omit from coating alignment agent and rubbing. Beside, in this study, we also characterizes the optical-electro properties of the liquid crystal molecules under VA mode and different UV irradiation time such as transmittance, contrast ratio and response time etc..

目錄
中文摘要......................................II
Abstract.....................................III
第1章 諸論....................................1
1-1 前言.......................................1
1-2 液晶的發現.................................3
1-3 液晶的分類.................................5
1-3-1 棒狀液晶相（Rod-like mesophases）........6
1-3-2 盤狀液晶相 (discotic mesophases)........11
1-4 配向製程介紹..............................12
1-5 研究動機與目的............................18
第2章 實驗方法...............................19
2-1 實驗材料與設備............................19
2-1-1 實驗材料................................19
2-1-2 實驗儀器................................22
2-2 液晶Cell製作流程..........................25
2-2-1 光聚合材單體與負型液晶之摻混............26
2-2-2 ITO導電玻璃之清洗......................27
2-2-3 液晶試片製作程序........................27
2-2-4 真空填充液晶............................27
2-3 實驗架構..................................30
2-4 POM之觀測................................31
2-5 穿透率之測定..............................33
2-6 應答時間測量—明暗時間之測定..............35
第3章 結果與討論.............................37
3-1 單體結構測定..............................38
3-1-1 材料元素分析............................38
3-1-2 紅外線光譜分析..........................40
3-1-3 核磁共振分析儀..........................45
3-2 液晶與光聚合材料之探討....................48
3-2-1 液晶對成膜的影響性......................48
3-2-2 UV光照射不同時間下的反應...............49
3-2-3 傳統摩擦配向模式之比較..................53
3-3 表面微結構之SEM觀測.......................54
3-4 光學特性之POM觀測.........................57
3-5 對比值之電壓依存性........................66
3-6 應答時間之量測............................71
第4章 結論...................................74
參考文獻......................................75

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