請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/51803
標題: | 利用交錯式電極設計之高穿透率藍相液晶顯示器之模擬分析 High Transmittance Blue-Phase Liquid Crystal Display with Interdigitated Electrode |
作者: | Shih-Hsien Wei 魏仕賢 |
指導教授: | 蔡永傑(Wing-Kit Choi) |
關鍵字: | 藍相液晶,交錯式波浪型電極結構,半穿透半反射式顯示器,錯位線, Blue Phase Liquid Crystal (BPLC),interdigitated corrugated electrode structure,FIS mode with enhanced protrusion electrode structure,transflective LCD,disclination lines, |
出版年 : | 2015 |
學位: | 碩士 |
摘要: | 液晶顯示器近年來已經逐漸成為人們生活中不可或缺的產品,從電視、智慧型手機、智慧型手錶、平板電腦以及大螢幕廣告看板等等,人們投入大量的金錢及人力進行許多研究,近來發展出一種新型液晶材料藍相液晶,它有著亞毫秒(sub-millionsecond)等級的響應時間以及暗態均相性(isotropic dark state)及不需配向層等優點,應用於顯示器中,將可以解決影像殘留以及節省製造成本等優點,但缺點就是現今的液晶顯示器電極結構加入藍相液晶之後,其驅動電壓過高且穿透率降低,導致藍相液晶尚未普及化的原因,實驗研究人員致力於發展新型電極結構以降低驅動電壓及增加穿透率,並因應近來穿戴式裝置的興起而設計半穿透半反射式液晶顯示器以因應顯示器在室外及室內都有良好的顯示效率。
在本論文中,我們利用交錯式的配置設計改善了穿透率以及操作電壓,在第一個設計中,利用交錯式電極的設計,改善波浪型電極在尖端的缺陷,減少錯位線的產生,提高穿透率;在第二個設計中,利用FIS模式增加了負偏壓使驅動電壓能夠降低的特性將Enhanced protrusion電極做更進一步的探討以及在半穿透半反射式液晶顯示器下,因為common電極的設置來維持反射率和穿透率能夠有相近的值。在本論文也設計以單間隙半穿透半反射式液晶顯示器(Single Cell Gap Transflective LCD)為主要設計,因為雙間隙半穿透半反射式液晶顯示器(Double Cell Gap Transflective LCD)在製程上複雜許多且會耗費相當多的成本,但單間隙的光電曲線較難以匹配,故本實驗加入藍相液晶並利用各種不同結構參數來調整反射區的光電曲線來和穿透區的光電曲線匹配,例如:角度 ,寬度L、電極間距以及液晶盒厚度d。如此一來將可使穿透區與反射區的光電曲線匹配。 In recent years, liquid crystal display (LCD) has become an indispensable part of our life, such as TV, smart phone, smart watch, tablet, billboard and so on. People put a lot of money and human resource into research. Recently, a material has been developed and is called “Polymer Stabilized Blue Phase Liquid Crystal (PS-BPLC)”. Blue phase liquid crystal (BPLC) has several advantages, such as sub-millionsecond response time, no alignment required and isotropic dark state (wide viewing angle) and so on. When we put BPLC into display, it can solve image sticking problem, save manufacturing cost, etc. The major difficulties of BPLC LCDs are that their operating voltage is rather too high and transmittance is relatively low, that’s why BPLC LCD hasn’t been mass produced by companies yet. Researchers are devoted to developing new electrode structures that can lower the operating voltage and also increase the transmittance. In this thesis, we propose two new designs that are based on interdigitated electrode to further improve the transmittance and lower the operation voltage of BPLC. In the first design, we use interdigitated corrugated electrode structure to improve the transmittance in the sharp corner positions with less disclination lines. In the second design, we use interdigitated FIS (Fringe-In-Plane Switching) mode to improve the transmission and lower operating voltage of BPLC. In this thesis, we also design PSBP transflective LCDs that can be used in wearable devices. We focus mainly on single-cell-gap transflective LCDs since double-cell-gap transflective LCDs may sometimes be more complicated and hence require higher cost in the manufacturing process. However, the electro-optic curves (transmission vs. voltage and reflection vs. voltage) are more difficult to match in single cell gap transflective LCDs. In this thesis, we will try to different parameters to adjust the reflection curves to match the transmission curves. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/51803 |
全文授權: | 有償授權 |
顯示於系所單位: | 光電工程學研究所 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
ntu-104-1.pdf 目前未授權公開取用 | 5.62 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。