標題: 新廣SmC*液晶相溫度之玻璃態鐵電型液晶
Novel Ferroelectric Glassy Liquid Crystal and Mixtures with Wide SmC* Mesophase
作者: 林淇文
Chi-Wen Lin
陳皇銘
Huang-Ming Philip Chen
顯示科技研究所
關鍵字: 電鐵式液晶;表面穩定電鐵式液晶;玻璃態;Ferroelectric liquid crystal;surface stabilized ferroelectric liquid crystal;glassy
公開日期: 2005
摘要: 由於液晶顯示器輕、薄、大尺吋等優點,相關的產品如筆記型電腦,液晶電視,電腦螢幕等已被大量地研究及開發。扭轉向列型液晶(twist nematic LC)是最早被使用於顯示器的液晶材料,由於低驅動電壓,灰階,偏向良好的優點,此材料廣泛被應用,但因為反應速度太慢使得快速的動態畫面會有模糊的現象以及背光使用效率過低的問題,於快速反應的液晶材料搭配色序法技術[2] 將是一種可預期的解決方法。於此,擁有次毫秒快速反應的鐵電式液晶將被列入優先考量。 研究目的 表面穩定鐵電式液晶最早於西元1980年被提出,此模態之鐵電式液晶在反應速度及視角上都有優異的表現並有雙穩態之特性。為了讓此鐵電式液晶能被運用於液晶顯示器上,材料本身要有好的排列與較廣的SmC*液晶態工作溫度,亦有研究團隊藉由分子的設計得到廣工作溫度[3-4]。在本研究中,我們將似玻璃態鐵電型液晶 (ferroelectric glassy liquid crystals)摻雜至W206A液晶中,致力於調配廣SmC*液晶態工作溫度之鐵電型液晶材料。
A series of ferroelectric glassy liquid crystals (FGLCs) were synthesized and evaluated their potentialfor fast switching ability less than 1 ms. The latest developed FGLC possesses wide chiral smectic Cmesophase over 100 ℃. The diluted FGLCs mixtures were also investigated using W206A as host. In particular, the 2% FGLC-1 mixture obtains better alignment with than R2301 (Clariant, Japan) in the same pre-made 2µm cell (from EHC). In the series of FGLC-3 mixtures, the chiral smectic A phase was completely suppressed within all concentrations. These results provide new promising LC materials for fast switching, field sequential color LC display.
URI: http://140.113.39.130/cdrfb3/record/nctu/#GT009315510
http://hdl.handle.net/11536/78595
Appears in Collections:Thesis


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