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博碩士論文 etd-0723107-151747 詳細資訊
Title page for etd-0723107-151747
論文名稱
Title
以dimenthylsioxane做為液晶配向膜之製備與研究
The study and fabrication of liquid crystal alignment using dimenthylsioxane
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
108
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2007-07-05
繳交日期
Date of Submission
2007-07-23
關鍵字
Keywords
配向、多區域垂直配向、表面能、色彩校正
surface energy, multi-domain vertical alignment, advanced super view, alignment, color correction technology
統計
Statistics
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The thesis/dissertation has been browsed 5653 times, has been downloaded 31 times.
中文摘要
垂直配向液晶顯示器因為擁有廣視角、高對比度和反應時間快等優點,所以近幾年獲得蓬勃的發展。本研究欲尋求低成本、易於製作且光學特性佳的材料以做為液晶垂直配向膜。在微奈米生物科技上常用來製作微流道的疏水性材料PDMS (dimenthylsiloxane),因為擁有良好的表面疏水特性,故本實驗採用PDMS 作為液晶配向薄膜。由於PDMS的不可摩擦配向,所以為了控制液晶分子指向,我們採用多區域垂直配向(MVA)及Advanced Super View(ASV)為配向機制。實驗中發現,PDMS在不同的烘烤條件下得到了不同的表面能,而後運用於配向膜,且灌注液晶後,皆得到垂直配向的效果。又因為PDMS具有較高的黏滯性,我們提出運用PDMS為MVA液晶盒之配向膜。且針對不同厚度PDMS配向膜,量測其穿透光譜,發現到可見光穿透度均一的特性。而在後續的研究中,發現ASV液晶樣品以PDMS配向膜,在未外加彩色濾光片和色彩校正之下, 其CIE色度座標中具有paper white的特性。
Abstract
Vertical alignment liquid crystal display has the advantages of wide view angle, high contrast and good response time. Today vertical alignment liquid crystal display get flourishing development, and Multi-Domain Vertical Alignment (MVA) technology is progressive. In this report we would find an alignment materiel which could be fabricated easily, low cost and good E-O characteristic. The use of dimenthysiloxane (PDMS) in fabrication of microfluidic channels technology in biotechnology has the advantages of characteristics foregoing. In this study PDMS was used as LC vertical alignment materiel. We used the MVA structure and ASV structure to align LC direction because PDMS cannot be rubbed. In experiment we found that PDMS exhibited different surface energies when it was baked in different temperature. The results of measuring the pre-tilt angle in the different surface energy conditions are similar. ASV LC samples were fabricated using PDMS alignment layer. MVA LC cells were made using high viscosity PDMS. We found the characteristic of paper white at CIE chromaticity diagram in the ASV LC sample without any color filter and color correction technology.
目次 Table of Contents
第一章 前言………………………………………………………………1
第二章 液晶相簡介與液晶物理特性
2.1 何謂液晶……………………………………………………....4
2.2 液晶的種類…………………………………………………....5
2.2.1 熱致型液晶………………………………………………....5
2.2.2 桿狀分子液晶……………..…………………………………5
2.3液晶的物理特性………................................................................9
2.3.1分子排列的秩序參數………………………………………...9
2.3.2液晶的彈性連續體理論……………………………………..10
2.3.3液晶的光學異向性…………………………………………..11
2.3.4電場對向列型液晶的影響…………………………………..14
2.4表面能………………………….....……………………………..16
2.5預傾角……………………………..…………………………….18
2.6液晶顯示器……………………………………………………...20
第三章 垂直配向液晶顯示器
3.1 垂直配向向列型(VAN)液晶顯示器…………………………...25
3.2 MVA液晶顯示器……………………………………………….28
3.3 VA-IPS電極驅動模式…………………………………………..33
3.4 PDMS疏水性材料介紹…………………………………………34
第四章 實驗方法與相關儀器知識
4.1.1 IPS電極製程………………………………………………....36
4.1.2 Photospacer製程……………………………………..………39
4.1.3 MVA製程……………………………………………..……...41
4.2液晶cell封裝與灌注……………………………………………42
4.3製備液晶樣品相關儀器說明……………………………………46
4.4光電量測方法與架構……………………………………………47
4.4.1 光電量測系統…………………………..................................47
4.4.2 偏光顯微鏡及光電量測系統……………………………..…49
4.4.3 反應時間…………………………………..…………………51
4.5 表面能分析儀…………………………………………………...52
4.6 alpha-step表面粗度儀…………………………………………...53
4.7 CIE色度座標…………………………………………………….54
第五章 結果與討論
5.1 表面分析數據與預傾角………………………………………….55
5.1.1烘烤溫度與時間對表面能結果………………..……………...55
5.1.2預傾角結果……………………………..……………………...58
5.2.1 alpha-step量測結果……..…………………………………......59
5.2.2 AFM表面起伏量測………..…………………………………..62
5.3穿透光譜量測PDMS及PI薄膜穿透光曲線…………………….63
5.4顯微鏡觀察MVA結構及ASV圖形……………………………..66
5.5 光電量測…………………………………………………………..69
5.5.1不同cell gap之暗態表現……………………………….……..69
5.5.2光穿透曲線圖及反應時間…………………………..…………70
5.6 CIE色度座標………………………………………………………78
第六章 結論與未來工作………………………………………………......86
參考文獻………………………………………………………………….....89
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