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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/7316


    Title: 鐵電與反鐵電液晶添加劑於扭旋型液晶光電顯示元件響應時間之改進研究;ferroelectric and antiferroelecytric liquid crystal mixer in improvment research of TN LCD response time
    Authors: 劉君豪;Chun-Hao Liu
    Contributors: 物理研究所
    Keywords: 響應時間;response time
    Date: 2003-07-08
    Issue Date: 2009-09-22 10:55:05 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 目前市面上最普遍的液晶顯示器(LCD)為TN型顯示器,這種液晶顯示器受限於驅動模式以及其所使用之向列型液晶材料的物性,造成一些顯示上的缺點。例如:視角小,對比度小,反應時間過長。本論文主要是針對900 TN型顯示器反應時間過長的缺點進行改進研究。主要是利用鐵電與反鐵電型液晶作為添加劑,混入TN型液晶顯示器所使用之向列型液晶材料中。鐵電與反鐵電型液晶其分子具有較強的自發分極,受電場作用時的反應非常快速,根據彈性連續體理論,液晶可視為一連續體,所以我們在向列型液晶中混入少量的鐵電或反鐵電型液晶材料,希望藉由鐵電與反鐵電液晶其受電場作用時反應快速之特性能夠牽動主體向列型液晶分子一起作快速的運動。另外,根據理論知道反應時間與液晶材料的彈性及黏性有關,所以也可以藉由添加鐵電或反鐵電型液晶材料到向列型液晶當中使液晶主體的黏性及彈性改變而造成反應時間上升或下降。最後實驗結果發現,鐵電或反鐵電型液晶添加劑可使以向列型液晶為主體的混合液晶其彈性及黏性發生改變,而且不同的混合比例所造成彈性及黏性增長的幅度也有所不同,所以反應時間因混合液晶之物性的改變而有所變化,藉由嘗試各種不同的混合比例我們可找出同時具有反應時間快速且驅動特性良好的混合液晶材料。 The most popular Liquid Crystal Display (LCD) is TN LCD. Due to its nematic LCD characteristics as well as the driving mode, it still has some drawbacks: narrow viewing angle, low contrast ratio, and long response time for example. This thesis focuses on methods to improve the response time of a TN LCD.Ferro/Antiferro-type liquid crystals are mixed into nematic liquid crystals which is used in TN LCD. By varying different proportions, we can find optimum liquid crystal material which has nice properties of fast response time and nice driving characteristics.
    Appears in Collections:[Graduate Institute of Physics] Electronic Thesis & Dissertation

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