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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 蔡永傑(Wing-Kit Choi) | |
dc.contributor.author | Pan Li | en |
dc.contributor.author | 李盼 | zh_TW |
dc.date.accessioned | 2021-07-10T21:35:15Z | - |
dc.date.available | 2021-07-10T21:35:15Z | - |
dc.date.copyright | 2016-10-14 | |
dc.date.issued | 2016 | |
dc.date.submitted | 2016-08-13 | |
dc.identifier.citation | [1]G. Heppke, B. Jérôme, H.-S. Kitzerow, and P. Pieranski, 'Electrostriction of BPI and BPII for blue phase systems with negative dielectric anisotropy,' Journal de Physique, vol. 50, pp. 549-562, 1989.
[2]H. Kitzerow and C. Bahr, Chirality in liquid crystals: Springer Science & Business Media, 2001. [3]S.Meiboom, J.-P. Sethna, P.-W. Anderson, and W.-F. Brinkman, Phys. Rev.Lett., vol. 46, 1981. [4]H. Kikuchi, M. Yokota, Y. Hisakado, H. Yang, and T. Kajiyama, 'Polymer-stabilized liquid crystal blue phases,' Nature materials, vol. 1, pp. 64-68, 2002. [5]J. Yan, H.-C. Cheng, S. Gauza, Y. Li, M. Jiao, L. Rao, et al., 'Extended Kerr effect of polymer-stabilized blue-phase liquid crystals,' Applied Physics Letters, vol. 96, p. 071105, 2010. [6]S.-H. Wei, 'High Transmittance Blue-Phase Liquid Crystal Display with Interdigitated Electrode,' National Taiwan University, 2015. [7]Z. Yanli, 'Optimization of Blue Phase Liquid Crystal Display Electrod Structure,' Hebei University of Technology, 2014 [8]Y. Sun, Y. Zhao, Y. Li, P. Li, and H. Ma, 'Optimisation of in-plane-switching blue-phase liquid crystal display,' Liquid Crystals, vol. 41, pp. 717-720, 2014. [9]L. Rao, H.-C. Cheng, and S.-T. Wu, 'Low voltage blue-phase LCDs with double-penetrating fringe fields,' Journal of Display Technology, vol. 6, pp. 287-289, 2010. [10]K.-M. Chen, S. Gauza, H. Xianyu, and S.-T. Wu, 'Hysteresis effects in blue-phase liquid crystals,' Journal of Display Technology, vol. 6, pp. 318-322, 2010. [11]H. C. Jau, P. H. Liao, H. W. Li, H. K. Hsu, C. H. Chen, C. C. Wang, et al., 'Improvement of electro‐optical properties of PSBP LCD using a double‐sided IPS electrode,' Journal of the Society for Information Display, vol. 20, pp. 351-353, 2012. [12]M. Jiao, Y. Li, and S.-T. Wu, 'Low voltage and high transmittance blue-phase liquid crystal displays with corrugated electrodes,' Applied Physics Letters, vol. 96, p. 011102, 2010. [13]J. P. Cui, Q. H. Wang, and F. Zhou, 'Transflective blue‐phase liquid‐crystal display with corrugated electrode structure,' Journal of the Society for Information Display, vol. 19, pp. 709-712, 2011. [14]Y. Li and S.-T. Wu, 'Transmissive and transflective blue-phase LCDs with enhanced protrusion electrodes,' Journal of Display Technology, vol. 7, pp. 359-361, 2011. [15]Z. Ge, S. Gauza, M. Jiao, H. Xianyu, and S.-T. Wu, 'Electro-optics of polymer-stabilized blue phase liquid crystal displays,' Applied Physics Letters, vol. 94, p. 101104, 2009. [16]Z. Ge, L. Rao, S. Gauza, and S.-T. Wu, 'Modeling of blue phase liquid crystal displays,' Journal of display technology, vol. 5, pp. 250-256, 2009. [17]Y. Sun, Y. Zhao, Y. Li, P. Li, and H. Ma, 'A low operating electric field blue-phase liquid crystal display with wedge protrusion,' Journal of Display Technology, vol. 10, pp. 797-801, 2014. [18]L. Rao and S.-T. Wu, 'Low-voltage blue phase liquid crystal displays,' Liquid Crystals Today, vol. 24, pp. 3-12, 2015. [19]M. Keddam, X. Nóvoa, and V. Vivier, 'The concept of floating electrode for contact-less electrochemical measurements: Application to reinforcing steel-bar corrosion in concrete,' Corrosion Science, vol. 51, pp. 1795-1801, 2009. [20]Y. Liu, Y. Li, D. Lai, J. W. Shiu, and S. T. Wu, 'P. 77: High Transmittance Blue‐phase LCD with a Floating Electrode,' in SID Symposium Digest of Technical Papers, 2013, pp. 1279-1281. [21]S. Yoon, M. Kim, M. Su Kim, B. Gyun Kang, M.-K. Kim, A. Kumar Srivastava, et al., 'Optimisation of electrode structure to improve the electro-optic characteristics of liquid crystal display based on the Kerr effect,' Liquid Crystals, vol. 37, pp. 201-208, 2010. [22]Y.-C. Chang, 'Effects of floating electrode on the Polymer-Stabilized Blue-Phase Liquid Crystal Displays,' National Taiwan University, 2015. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/76695 | - |
dc.description.abstract | 自液晶應用於顯示器以來,廣泛的出現在我們生活周遭,如液晶電視、平板電腦、智慧型手機及大型廣告面板等,極大的優化了資訊呈現的方式。傳統的液晶顯示器雖然有很多優點但響應時間慢,很難滿足人們對大容量高幀頻顯示器的要求。近幾年研究人員研發出一種新型的液晶材料藍相液晶(BPLC),存在於向列相與各向同性相之間。藍相液晶顯示器因具有工藝簡單、高對比、寬視角和快速響應等優點被廣大學者爭相研究。但是,驅動電壓高和穿透率低等問題,為制約藍相液晶顯示器商業化生產的主要瓶頸。
本論文使用TechWiz模擬軟體來設計基於三角形凸起物的三種電極結構來改善藍相液晶顯示器的操作電壓和穿透率。第一種電極結構將增強型梯形電極結構改成等腰三角形單側電極結構,通過優化等腰三角形凸起物的間距可以得到更高的穿透率以及更低的操作電壓;第二種電極結構在第一種電極結構基礎上將等腰三角形凸起物改成直角三角形凸起物,並探討了只在斜邊有電極和斜邊與直角邊都有電極的情況,比較了不同盒間隙的電壓-穿透率曲線,結果兩邊都有電極會有更高的穿透率。接著探討在有浮接電極情形下將直角三角形電極結構取代反正弦和反橢圓形狀電極結構,穿透率和操作電壓有改善;第三種電極結構是埋入式牆形電極結構,由於之前電極結構的不對稱需要調節兩種凸起物間距,且不同區域穿透率不能同時達到最大值。埋入式電極結構由於電極是牆形,所以產生的電場非常水平;由於結構是對稱形狀,所以只需要調節一種凸起物間距,不同區域的穿透率可以同時到達最大值,穿透率高達約95%,進一步減小凸起物寬度,可以減小操作電壓,有很大的改善。 | zh_TW |
dc.description.abstract | Since the liquid crystal was applied for monitors, it has been widespread in our daily life, such as LCD TV, Tablet PC, smartphone and large advertising panels, which has greatly optimized the way of presenting information. Although the conventional liquid crystal displays have many advantages, they have slow response time, which is difficult to meet people’s requirements for the large capacity and high frame rate displays. In recent years, researchers have developed a new type of liquid crystal material called blue phase liquid crystal(BPLC), and it exists between chiral nematic phase and isotropic phase. Many scholars are eager to study blue phase liquid crystal display because of its simple process, high contrast, wide viewing angle and fast response, etc. However, the high driving voltage and low transmittance for the blue phase liquid crystal display are major bottlenecks to restrict for its commercial production.
In this thesis we use the simulation software (TechWiz) to design three types of electrodes based on triangle protrusion to make the transmittance and operating voltage of blue phase liquid crystal display better. In the first structure we discuss the enhanced trapezoid protrusion structure and design electrode based on one side of isosceles triangle protrusion. By optimizing the protrusion distances we can obtain higher transmittances and lower operating voltages. In the second structure we change the isosceles triangle protrusion into right triangle protrusion and discuss the electrodes only on hypotenuse(one-sided) and on both hypotenuse and right angle side(two-sided).After comparing T-V curves at different cell gaps, we find that the latter structure is better. Then we compare reverse sin (Rev.Sin)shape electrode and reverse elliptic (Rev.Elliptic) shape electrodes with electrodes based on right triangle protrusion(two-sided),and the three shapes all combine with floating electrodes. The results show that electrodes based on right triangle protrusion(two-sided) have higher transmittances and lower operating voltages. The third electrode structures are embedded wall-shaped electrode structures. The previous electrode structures are unsymmetrical so we need to adjust two types of protrusion distances, and their transmittances at different regions cannot get the maximum at the same voltage. Embedded wall-shaped electrode structures can generate strong horizontal electric field, and we need to adjust only one type of protrusion distance. This structure's transmittances at different regions can get the maximum at the same voltage, and the transmittance is about 95%.Then we reduce protrusion width and the operating voltages are lower. | en |
dc.description.provenance | Made available in DSpace on 2021-07-10T21:35:15Z (GMT). No. of bitstreams: 1 ntu-105-R03941106-1.pdf: 7876689 bytes, checksum: 437dc257960e06425e33556edfe15bd4 (MD5) Previous issue date: 2016 | en |
dc.description.tableofcontents | 口試委員會審定書 #
致謝 i 中文摘要 ii Abstract iii 目錄 v 圖索引 viii 表索引 xii Chapter 1 液晶簡介 1 1.1 何謂液晶 1 1.2 液晶的分類 2 1.2.1 向列型液晶 2 1.2.2 層列型液晶 3 1.2.3 膽固醇型液晶 3 1.3 液晶的特性 4 1.3.1 光學各向異性 4 1.3.2 有序參數 5 1.3.3 連續體理論 5 1.3.4 介電常數與介電各向異性 6 1.4 藍相液晶 8 1.4.1 藍相液晶的發現 8 1.4.2 聚合物穩定性型藍相液晶 9 1.4.3 藍相液晶的克爾效應 10 Chapter 2 液晶顯示器 13 2.1 液晶顯示器的發展 13 2.2 液晶顯示器的類型與結構 14 2.2.1 反射式顯示器 14 2.2.2 穿透式顯示器 15 2.2.3 半穿半反型顯示器 16 2.3 液晶顯示器的性能指標 17 2.3.1 光利用率 18 2.3.2 解析度 18 2.3.3 響應時間 18 2.3.4 對比度 19 2.3.5 視角與色差 19 2.3.6 灰度 19 2.4 藍相液晶顯示器 20 2.4.1 IPS 電極結構藍相液晶顯示器 20 2.4.2 VFS 電極結構藍相液晶顯示器 21 2.4.3 藍相液晶顯示器的優缺點及缺點解決方法 23 Chapter 3 模擬軟體簡介及電極結構設計 25 3.1 TechWiz LCD 軟體模擬 25 3.1.1 Material Data Base 25 3.1.2 LC Analysis 26 3.1.3 Optical Analysis 27 3.2 用TechWiz LCD 模擬軟體設計電極結構 28 3.2.1 文獻回顧與研究動機 28 3.2.2 梯形電極結構模擬 30 3.2.3 基於等腰三角形凸起物之電極結構模擬 32 3.2.4 基於直角三角形凸起物之電極結構畫法 33 Chapter 4 結構模擬結果與討論 36 4.1 相同參數模擬Paper結果 36 4.2 基於等腰三角形凸起物之電極結構的改善 37 4.2.1 直接切割梯形凸起物所得結構之探討 37 4.2.2 改變三角形凸起物間距對電光特性影響 41 4.2.3 盒間隙變化對電壓和穿透率影響探討 43 4.2.4 相同電極位置三角形和梯形凸起物電光特性比較 46 4.2.5 等腰三角形凸起物單側電極與雙側電極結構比較 47 4.3 基於直角三角形凸起物之電極結構探討 48 4.3.1 基於直角三角形凸起物電極結構 48 4.3.2 直角三角形與等腰梯形和等腰三角形凸起物電極結構比較 51 4.3.3 直角三角形電極結構結合浮接電極探討 58 4.4 埋入式墻形電極結構 70 4.4.1 普通牆型電極結構與埋入式電極結構探討 70 4.4.2 盒間隙對操作電壓和穿透率的影響 77 4.4.3 直角三角形凸起物間距和寬度對光電曲線影響與探討 80 4.4.4 直角三角形凸起物底部寬度對光電曲線影響與探討 83 Chapter 5 結論與未來目標 85 Reference 87 | |
dc.language.iso | zh-TW | |
dc.title | 新型電極結構應用於低電壓高穿透率藍相液晶顯示器之研究 | zh_TW |
dc.title | The Study of New Electrode Structure Applying to Low Voltage and High Transmittance Blue Phase Liquid Crystal Display | en |
dc.type | Thesis | |
dc.date.schoolyear | 104-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 林晃巖(Hoang-Yan Lin),黃定洧(Ding-Wei Huang) | |
dc.subject.keyword | 藍相液晶,TechWiz,凸起物,浮接電極,埋入式牆形電極, | zh_TW |
dc.subject.keyword | Blue phase liquid crystal,TechWiz,Protrusion,Floating electrode,Embedded wall-shaped electrode, | en |
dc.relation.page | 89 | |
dc.identifier.doi | 10.6342/NTU201602562 | |
dc.rights.note | 未授權 | |
dc.date.accepted | 2016-08-15 | |
dc.contributor.author-college | 電機資訊學院 | zh_TW |
dc.contributor.author-dept | 光電工程學研究所 | zh_TW |
顯示於系所單位: | 光電工程學研究所 |
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