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研究生: 謝威鋐
Wei-Hung Hsieh
論文名稱: 模擬向列型液晶之溫度依賴性反應時間特性
Modeling Temperature-Dependent Response Time Characteristics of Nematic Liquid Crystals
指導教授: 張勝良
Sheng-lyang Jang
口試委員: 莊敏宏
Miin-horng Juang
徐世祥
Shih-hsiang Hsu
喬傳國
Chuan-kuon Chiao
學位類別: 碩士
Master
系所名稱: 電資學院 - 電子工程系
Department of Electronic and Computer Engineering
論文出版年: 2010
畢業學年度: 98
語文別: 中文
論文頁數: 77
中文關鍵詞: 液晶反應時間預傾角溫度效應
外文關鍵詞: liquid crystal, response time, pretilt angle, temperature effect
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  • 近年來由於消費性電子產業的蓬勃發展,對於液晶顯示器的需求也日漸增加,使得對於液晶顯示器畫面的要求,動態影像的呈現,其標準也逐漸的提高。然而,液晶的反應時間在應用的溫度中對於畫面動態影像的流暢度有絕對的影響,故本文的研究著重於探討液晶溫度依賴性與反應時間。
    首先分別討論液晶的預傾角和溫度效應對液晶反應時間的影響,並利用液晶各種物理特性與理論推導,以證明此兩種效應對於液晶反應時間有絕對影響力。最後藉由比較理論推導與實驗結果,驗證模型的正確性;根據此結論可有效地瞭解液晶反應時間,使液晶顯示器的動態影像切換更為流暢,藉此提高其產品價值。


    There has been a rapid development of consumptive electronic industry recently, and LCD becomes more and more important. Now, people pay much more attention to the quality of LCD screen and the presence of the dynamic imaging. It is true that the response time of liquid crystal at applied temperature has a great influence on the fluency of dynamic imaging. Therefore, the thesis will focus on researching the temperature-dependent response time of liquid crystals.
    First of all, the thesis introduces how pretilt angle and temperature effects influence on the response time of liquid crystal. Then, proving from the theoretical derivation, these two effects indeed have much influence on the response time of liquid crystal. At last, we verify the models by comparing with theoretical derivation and the experimental results. In addition, according to the results, the response time of liquid crystal can be effective in understanding and the dynamic image switching can become much smoother. In this way, the product value will increase.

    第一章 前言 ........................................................................................................ 1 1.1研究背景 ....................................................................................................... 1 1.2研究目的 ....................................................................................................... 2 1.3論文架構 ....................................................................................................... 2 第二章 反應時間與預傾角 ................................................................................ 3 2.1液晶反應時間(ResponseTime) ............................................................... 3 2.2液晶的介電向差(Dielectric Anisotropy) ................................................ 5 2.3液晶預傾角(Pretilt Angle) ...................................................................... 9 2.4理論推導 ..................................................................................................... 11 第三章 反應時間的溫度效應 .......................................................................... 29 3.1溫度與彈性係數 ......................................................................................... 29 3.1.1彈性係數(Elastic Constant) ............................................................ 29 3.1.2秩序參數(Order Parameter) ........................................................... 32 3.1.3理論推導 .............................................................................................. 33 3.2溫度與旋轉黏度係數 ................................................................................. 37 3.2.1旋轉黏度係數(Rotational Viscosity) ............................................. 37 3.2.2理論推導 .............................................................................................. 40 3.3液晶的雙折射率和光物性 ......................................................................... 42 3.3.1雙折射率(Birefringence)與光學的正負 ........................................ 42 3.3.2折射率異方性(Refraction Anisotropy)與光的性質 ...................... 44 3.4反應時間之溫度效應 ................................................................................. 46 第四章 模型驗證與討論 .................................................................................. 49 4.1預傾角與反應時間 ..................................................................................... 49 4.2預傾角與上升時間之修正 ......................................................................... 52 4.3溫度效應與反應時間 ................................................................................. 54 第五章 結論 ...................................................................................................... 61 作者簡介 .............................................................................................................. 62 附錄A .................................................................................................................. 63 參考文獻 .............................................................................................................. 66

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