臺灣博碩士論文加值系統

本論文利用一種簡單的方法製作高反射率的聚合物穩固藍相液晶樣品。將聚合物單體摻進藍相液晶，再經由UV光曝光後形成聚合物穩固藍相液晶，能使得藍相液晶的結構會更穩定，具有更寬的溫度範圍。接著再利用樣品配向的方式使藍相液晶的晶格整齊排列，產生高效率的布拉格反射，並透過施加電壓的方式來調控。實驗中分別製作了能夠反射紅色、綠色與藍色的聚合物穩固藍相液晶樣品，作為顯示器的三個子像素。實驗結果顯示三個子像素(紅、綠與藍色)的樣品反射率分別為50、77與60 %，且綠色與藍色子像素的樣品在施加電壓下具有良好的光電特性。此外，在未來的研究中預期能改善操作電壓過高的問題。

A simple method of fabricating high-reflective display with the polymer-stabilized blue phase liquid crystals (PS-BPLCs) is proposed. The PS-BPLCs are formed from the polymer monomer-doped BPLCs curing by the UV light, resulting in the more stable structure and the wider temperature range of the BPLCs. The uniform reflective color and high Bragg''s reflection of the BPLCs can be obtained by rubbing the surface of sample. In this work, three PS-BPLC samples are produced as the basic sub-pixels of the display, which can reflect the red(R), green(G), and blue(B) lights, respectively. The results show that the G- and B-sub-pixel of the PS-BPLC samples have a good behavior of photoelectric when applied voltage. The reflectances of three PS-BPLC samples (R, G, and B) are about 50, 77, and 60 %, respectively. Moreover, the major problem of PS-BPLCs with high operating voltage is expected to improve in the further study.

致謝 i
摘要 ii
Abstract iii
目錄 iv
圖次 vi
表次 ix
第一章 液晶簡介 1
1-1 前言 1
1-2 液晶簡介 1
1-2.1 液晶的起源 1
1-2.2 何謂液晶 2
1-3 液晶分類 3
1-3.1 依排列方式分類 3
1-3.2 依生成方法不同 9
1-3.3 依液晶分子量方式分類 9
1-4 液晶物裡 9
1-4.1 液晶的折射率異向性 9
1-4.2 介電異向性 12
1-4.3 彈性連續體理論 13
1-4.4 秩序參數 14
第二章 基礎理論 15
2-1 藍相液晶基礎理論 15
2-1.1 藍相液晶的旋光性 15
2-1.2 藍相液晶的雙扭轉柱體結構與堆疊 16
2-1.3 藍相液晶的晶格缺陷 17
2-1.4 藍相液晶的布拉格反射與光學均向性 18
2-1.5 藍相液晶的自由能理論 19
2-1.6 藍相液晶在電場中的相變 19
2-1.7 藍相液晶的溫寬拓寬技術 21
2-1.8 藍相液晶的克爾理論 24
2-2 顯示器相關簡介 25
2-2.1 穿透式顯示器 25
2-2.2 反射式顯示器 26
第三章 樣品製作與實驗架設 27
3-1 樣品製作 27
3-1.1 材料介紹 27
3-1.2 聚合物穩固藍相液晶配置 29
3-1.3 樣品盒製作 30
3-2 樣品檢測 32
3-2.1 藍相液晶溫寬量測 32
3-2.2 液晶盒厚度量測 33
第四章 實驗結果與討論 34
4-1 藍相溫度範圍量測 34
4-2 藍相液晶光學量測 35
4-2.1 聚合物穩固藍相液晶之反射式偏光顯微鏡量測與反射率量測 35
4-2.2 藍相液晶光電量測 38
第五章 總結與未來展望 44
5-1 總結 44
5-2 未來展望 45
參考文獻 46

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