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題名 | 經由紫外光配向程序之液晶混合系統(垂直配向模式)的相轉移行為與灰階特性探討=Phase-Transition Behaviors and Gray-Scale Characteristics of the Liquid Crystal Mixtures System (Vertical Alignment Mode) with Ultra-Violet Photo-Alignment Process |
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作者姓名(中文) | 王儷珊; 何宗育; 李俊毅; | 書刊名 | 技術學刊 |
卷期 | 26:4 2011.12[民100.12] |
頁次 | 頁243-252 |
分類號 | 448.5 |
關鍵詞 | 雙旋光中心; 液晶; 垂直配向; 相轉移行為; 灰階特性; Two chiral centre; Liquid crystal; Vertical alignment; Phase-transition behaviors; Gray-scale characteristics; |
語文 | 中文(Chinese) |
中文摘要 | 本研究為利用具有乳酸結構的雙旋光中心液晶 (two chiral centre liquid crystals) 材料,於實驗中以偏光顯微鏡 (polarized optical microscopy, POM) 觀察此液晶材料從等向性溫度 (isotropic temperature)降溫至出現雙旋光性層列型液晶 (SmA*)相時,會產生垂直排列紋理 (homeotropic texture) 的現象。我們希望藉由將雙旋光結構 SmA*液晶摻入光致垂直配向的負誘電異方性液晶 (向列型液晶)/壓克力單體混合系統,以達到輔助液晶分子整體垂直排列效果。而在此液晶混合系統之垂直配向模式下,我們以 POM來觀察液晶分子排列的情況以及利用示差掃描熱分析儀 (differential scanning calorimeter, DSC) 來探討其液晶相轉移行為。最後,也探討其液晶混合系統的灰階特性。 |
英文摘要 | In this study, we observe the lactic acid structures (two chiral centre liquid crystals) of liquid crystal material, and the homeotropic texture phenomenon utilizing polarized optical microscopy (POM) from an iso- tropic temperature down to the temperature at which SmA* appears. We expect to obtain two chiral structure SmA* LC by mixing photo-induced vertical alignment (VA) negative dielectric anisotropy LC (Nematic type LC) and acrylic monomer mixture systems to achieve overall LC molecules arranged in a vertical alignment. In addition, we have observed the LC molecules arrangement condition in the VA mode of the LC mixture systems by POM and investigated LC phase-transition behaviors by differential scanning calorimeter (DSC). Finally, the gray-scale characteristics of the LC mixture systems have also been explored. |
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