膽固醇液晶顯示器為具雙穩態特性的反射式顯示器，適用於看板、告示與廣告用途的顯示器，只需在需要更新畫面時，才需供給電壓，具有省電節能的優點。由於膽固醇液晶自有的反射光譜，及本身就兼具反射鏡、偏振片和彩色濾波片的功能，故不需搭配多層光學元件，即可達到低生產成本且輕薄、耐衝擊之顯示器特性。而具有微胞結構的膽固醇液晶可應用在可撓曲式的顯示器，微胞結構使得顯示器在撓曲時液晶不會流動而影響到顯示品質。
本實驗主要探討在光引致相分離所產生的微胞化膽固醇液晶結構下,製程條件對縮短膽固醇液晶由 Homeotropic-state 到 Planar-state 的反應時間之影響。首先我們先分析微胞結構表面所產生的配向力。 並討論在不同的製程條件下包括紫外光強度、相分離溫度以及液晶盒厚度所產生不同的微胞結構，而探討不同的微胞結構如何影響樣品的光電特性包括反應時間、反射率以及視角表現。
於實驗過程中，我們發現在雙基板部分實驗中高分子聚合物(由EMA與TRI組成)以及在單基板實驗中由北科大所提供的多官能基膠材所形成的微胞化結構具有垂直配向力。並且在不同的製程條件下(包括紫外光強度與相分離溫度)會引致不同的垂直配向力。不同的垂直配向力會影響反應時間、反射率及視角表現，在適當的邊界結構中，些微犧牲反射率下，可大幅減少回復時間。

This paper study the influence of surface properties of encapsulated CLC on response time and reflectance via polymerization induced phase separation. The cured polymer layer, which is composed of the mixture of EMA and TRI, adhere to the inside of the non-treated glass substrate and change the surface properties to vertical alignments. Different boundary conditions caused by various UV curing intensity and cell gap lead to different electro-optical properties for CLC display. With a proper boundary structure, the transition time from homeotropic to planar of CLC can be reduced obviously with slightly reduced reflectance.

致謝................................................................................................................................ iii
摘要................................................................................................................................ iv
Abstract ........................................................................................................................... v
圖目錄........................................................................................................................... viii
表目錄.............................................................................................................................. x
第一章 緒論..............................................................................................................- 1 -
第二章 液晶及CLC 液晶簡介................................................................................- 2 -
2-1 液晶(Liquid Crystals)簡介.......................................................................- 2 -
2.1.1 何謂液晶..........................................................................................- 2 -
2.1.2 液晶的分類......................................................................................- 3 -
2.1.3 液晶的物理特性..............................................................................- 4 -
2.2 膽固醇液晶簡介.........................................................................................- 6 -
2.2.1 膽固醇液晶結構介紹......................................................................- 6 -
2.2.2 膽固醇液晶的光學性質..................................................................- 8 -
2.2.3 膽固醇液晶雙穩態介紹以及轉態過程..........................................- 9 -
第三章 實驗方法與過程........................................................................................- 11 -
3.1 材料介紹與樣品製作............................................................................... - 11 -
3.1.1 雙基板實驗材料介紹....................................................................- 11 -
3.1.2 單基板實驗材料介紹....................................................................- 14 -
3.1.3 實驗樣品製作:...............................................................................- 19 -
3.2 光電特性量測架構介紹...........................................................................- 24 -
3.2.1 穿透率量測架構介紹....................................................................- 24 -
3.2.2 反應時間量測架設介紹................................................................- 24 -
3.2.3 反射率與視角(色偏)量測機台介紹.............................................- 26 -
第四章 結果與討論................................................................................................- 28 -
4.1 實驗A 探討微胞化膽固醇液晶由Homeotropic state 到Planar state 的轉
態過程................................................................................................................- 28 -
4.1.1 實驗A-1 探討微胞化膽固醇液晶轉態過程中，類似週期性排列的
圖像............................................................................................................- 28 -
4.1.2 實驗A-2 藉由量測膽固醇液晶樣品在轉態過程中的穿透率，判斷
轉態過程中Transient Planar state 存在時間........................................- 32 -
4.2 實驗B 探討微胞化膽固醇液晶其表面結構所可能提供的配向效果..- 34 -
4.2.1 實驗B-1 Host 液晶改用向列型液晶E7 來探討微胞化結構所提供
的配向效果................................................................................................- 34 -
4.2.1 實驗B-2 以水平配向的液晶盒探討不同紫外光強度下微胞結構所
提供的配向力強弱關係............................................................................- 36 -
4.3 實驗C 探討不同相分離條件下所產生相對應的光電特性..................- 38 -
4.3.1 實驗C-1 微胞化膽固醇液晶在偏光顯微鏡下所呈現的類似週期性
排列圖像....................................................................................................- 38 -
4.3.2 實驗C-2 不同紫外光強度下，微胞化膽固醇液晶的光電特性量測
與探討........................................................................................................- 40 -
4.4 實驗D 探討單基板製程下:不同相分離條件對微胞化膽固醇液晶光電特
性影響................................................................................................................- 45 -
4.4.1 實驗D-1 單基板製程下，紫外光強度對於微胞化膽固醇液晶光電
特性影響....................................................................................................- 45 -
第五章 結論與未來展望........................................................................................- 48 -
參考文獻....................................................................................................................- 49 -

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