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標題: | 雙邊蝕刻電極半穿半反藍相液晶顯示器在不同穿反比例下之研究 Transflective Blue Phase Liquid Crystal Display Using Double-side Etching Electrodes with Different Transflective Ratio |
作者: | Yu-Hao Chen 陳宇豪 |
指導教授: | 蔡永傑 |
關鍵字: | 藍相液晶,半穿半反式,TechWiz,雙邊電極技術,蝕刻基板技術, Blue phase liquid crystal,Transflective,TechWiz,Double-side electrodes,Etching substrate, |
出版年 : | 2019 |
學位: | 碩士 |
摘要: | 液晶螢幕到現在一直以來都是顯示器的主流,在生活中隨處可見,其中藍相液晶在未來中具有發展潛力,此種液晶不需配向層且擁有亞毫秒的響應時間等優勢,但同時需要較高的驅動電壓,且穿透率還有許多改善的空間,本論文將以藍相液晶作為研究主題,並改變元件的結構以改善缺點。
本論文的電極結構設計採用了西元2010年由吳思聰研究團隊所提出的蝕刻基板結構以及西元2011年由河北工業大學提出的雙邊電極排列技術,綜合上述設計改善高操作電壓與低穿透率的問題,並延伸出穿透式顯示器與半穿半反式顯示器的兩種結構。在經由參數維度的研究討論後,得出本論文結構的特性及原理。其中半穿半反式顯示器較為特別,元件分為穿透與反射兩區域,作為一良好的顯示器必須將兩區域之間的光電表現調整至同步變化,將光電曲線的重合作為本論文研究的一大主題,在了解參數變化的影響後,為了使其元件能有更彈性的運用,我們將半穿半反式顯示器依照穿透區與反射區的面積比,做出不同的結果與討論。本論文設計經由最佳化後,得穿透式顯示器之操作電壓11.5伏特,且最大穿透率有93.5%的高表現;另外半穿半反式顯示器也做出操作電壓彼此匹配的參數組合,其操作電壓為10.4伏特,且最大穿透率與最大反射率可以維持在90%以上。此研究結果對於藍相液晶顯示器來說都是有良好的表現改善,但其中也包含了製程中的困難及幾種光電表現上的缺陷,將在本論文中分析並討論。 Liquid crystal display has been a mainstream display technology and it could be seen everywhere in our life. Blue phase liquid crystal (BPLC) has potential for next-generation display technology. BPLC doesn’t need alignment layer and it also has sub-millisecond fast response time. These properties make BPLC very attractive. However, BPLC has some problems such as high operation voltage and low transmittance. In this thesis, we will improve these problems by proposing new structure designs for BPLC displays. In this thesis, we referenced two concepts. One is the etching substrate, which was proposed by Prof S.T Wu’s group in 2010. The other one is the double-side electrodes, which was proposed by Hebei University of Technology in 2011. With these two methods, we could improve problems of high operation voltage and low transmittance. After detailed analyses and discussions, we had some conclusions for these devices. In these designs, the transflective device is particular attractive. In order to use transflective LCDs more widely, we made different discussions according to the ratio between the transmissive area and the reflective area. After optimizing the data, we got a transmissive device which had high optical efficiency of about 93.5% at 13V. On the other hand, the new transflective design had optical efficiency of > 90% at 10.4V. The results all show good improvement for PSBP LCDs. There are some issues that need to be addressed, e.g. the fabrication difficulty, defect of performance, etc. All of them will be discussed in this thesis. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/74023 |
DOI: | 10.6342/NTU201903430 |
全文授權: | 有償授權 |
顯示於系所單位: | 光電工程學研究所 |
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ntu-108-1.pdf 目前未授權公開取用 | 8.54 MB | Adobe PDF |
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