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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 | Jyun-Yu Chen | en |
dc.contributor.author | 陳駿瑜 | zh_TW |
dc.date.accessioned | 2021-06-16T04:03:28Z | - |
dc.date.available | 2017-02-03 | |
dc.date.copyright | 2015-02-03 | |
dc.date.issued | 2014 | |
dc.date.submitted | 2014-10-07 | |
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Sun, “Holographic polymer-dispersed liquid crystals: materials, formation, and applications,” Adv. Optoelectron. 2008, 1–53 (2008). [27] T. J. White, W. B. Liechty, L. V. Natarajan, V. P. Tondiglia, T. J. Bunning, and C. A. Guymon, 'The Influence of N-Vinyl-2-Pyrrolidone in Polymerization of Holographic Polymer Dispersed Liquid Crystals (HPDLCs),' Polymer, 47 (7), 2289-98, (2006). [28] Sutherland RL, Natarajan LV, Tondiglia VP, Bunning TJ. SPIE Proc. 3421:8-18,(1998). [29] C. Moser, L. Ho, E. Maye, and F. Havermeyer, J. Phys. D 41, 224003 (2008). [30] Domash LH, Chen Y-M, Gomatam BN,Gozewski CM, Sutherland RL, et al.,SPIE Proc. 2689:188-9,(1996). [31] Natarajan LV, Sutherland RL, Bunning TJ,Tondiglia VP., SPIE Proc. 3292:44-51, (1998). [32] P. D. Atherton, N. K. Reay, J. Ring, and T. R. Hicks, 'Tunable Fabry-Perot Filters,' Optical Engineering, vol. 20, pp. 806-814, (1981) [33] J. S. Patel and M. W. Maeda, 'Tunable Polarization Diversity Liquid-Crystal Wavelength Filter,' Ieee Photonics Technology Letters, vol. 3, pp. 739-740, Aug (1991). [34] K. Hirabayashi, H. Tsuda, and T. Kurokawa, 'Tunable Liquid-Crystal Fabry-Perot-Interferometer Filter for Wavelength-Division Multiplexing Communication-Systems,' Journal of Lightwave Technology, vol. 11, pp. 2033-2043, Dec (1993). [35] Hongwen Ren, Y. H. Lin, S. T. Wu, “Polarization-independent and fast-response phase modulators using double-layered liquid crystal gels”, Applied Physics Letters 88, (2006). [36] Chiao-Hsiu Chiang, “Fabrication of subwavelength dual structures on silicon substrates with anti-reflection and low sliding angles”, (2010). [37] 侯舜齡,台灣大學光電工程研究所,'高分子聚合物分散液晶的特性與其在抬頭顯示器和可調式共振腔的應用',(2013). | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/55456 | - |
dc.description.abstract | 顯示器技術一直是近代一個熱門的課題,從早期CRT到現在液晶顯示器的普遍化、大尺寸化,無一不投入許多研究的人力及心血。近年由於可攜式行動裝置大量問世,從智慧型手機至智慧型手錶,人們的生活即將被科技產品所涵蓋,顯示器絕對是舉足輕重的一環。由於可攜式行動裝置的使用環境大部分具有強烈的環境光源(Ambient Light),而環境光源會導致大部分穿透式顯示器(Transmissive LCD)出現蓋光效應(Washed Out Effect),這時候反射式顯示器(Reflective LCD)因應而生,雖然反射式顯示器不容易被環境光源影響,但卻常常發生對比度不足以及亮度不足的問題,因為反射式顯示器的光源主要來自於環境光源,當處於室內時.環境光源薄弱,即會造成反射式顯示器的光源大幅下降,而科研人員結合了這兩種顯示器的優點發明了半穿透半反射顯示器(Transflective LCD),不但擁有穿透式顯示器的背光源,也能像反射式顯示器在室外有良好的顯示品質並且節省能源;但半穿透半反射顯示器製作上相較於其他兩者較為困難,普遍依照結構分為:單間隙半穿透半反射顯示器(Single Cell Gap Transflective LCD)以及雙間隙半穿透半反射顯示器(Double Cell Gap Transflective LCD)。雙間隙半穿透半反射式顯示器主要通過不同間隙使得穿透區以及反射區的光電曲線(Electro-Optic Curve)達到匹配,但製程上複雜許多,同時也會耗費許多成本;而單間隙雖然製程較為簡單,但因為間隙相同,較難以使光電曲線互相匹配。本篇論文利用電極的週期性結構設計使得反射區的光電曲線能漸漸調整匹配至穿透區,同時也利用高分子穩定型液晶(Polymer Stabilized Liquid Crystal, PSLC)在聚合過程時施加電壓,使得液晶獲得預傾角,進而調整光電曲線,而這樣的方法相較其他的方法簡單且便利許多。
除了顯示器的部分,我們討論了另外一種週期性結構的液晶裝置_全像高分子分散型液晶(Holographic Polymer Dispersed Liquid Crystal, HPDLC),我們利用雙光干涉製造出液晶光柵,而這樣的材料可以拿來記錄全像影像資訊,並且利用外加電壓改變液晶的排列方向,使液晶折射率改變,作出可電壓調變的全像片或是光電濾波器、可調式微透鏡、波長多功器等等應用。而我們成功製作出週期約554nm的HPDLC,繞射效率約為7.39%。 而最後在附錄部分我們則討論利用高濃度高分子聚合物單體所調製的高分子聚合物分散液晶來製作法布立-培若共振腔(Fabry-Perot Cavity)。我們想利用本身穿透率高、折射率可調以及反應速度快的特性,在共振腔內藉由給予不同的電壓來改變特定波長的穿透率(波長調變),來彌補對比不足的缺點,同時也能作為一個十分優秀的特定波長光開關(Optical Shutter)。 | zh_TW |
dc.description.abstract | Monitor technology has been a popular topic over the recent years, from the earlier CRT stages to the gradually common liquid crystal display (LCD), which has been also expanding in size; manpower and resources have been invested in all of the mentioned technology. In the past few years, portable mobile devices are introduced to the world in large numbers, ranging from smartphones to smartwatches. People’s lives are about to merge with technology products, and monitors are definitely an essential element.
Portable devices are usually used in environments with strong ambient light, the light will cause most of the Transmissive LCD to show a washed out effect; the said effect resulted in the production of the Reflective LCD. Although the Reflective LCD is not easily affected by ambient light, problems such as an insufficient contrast ratio or weak brightness occurs often, because the light source of Reflective LCD comes mainly from ambient light. When the device is indoors, the weak ambient light causes the light source to decrease largely for Reflective LCD. Technology researchers then combined the strengths of the two LCD’s and invented the Transflective LCD, which not only possesses the back light module of the Transmissive LCD, but is also able to display images of good quality outdoors and save power like the Reflective LCD. But the Transflective LCD is more difficult to produce than the two other LCD’s, and is divided into two types according to the structures: Single Cell Gap Transflective LCD and Double Cell Gap Transflective LCD. Double Cell Gap Transflective LCD enables the electro-optic curves in the transmissive region and reflective region to match through different cell gaps, but it is complicated to fabricate and will cost more to produce. The Single Cell Gap Transflective LCD is easier to produce, but because the cell gaps are the same, it is more difficult to match the electro-optic curves with each other. This thesis allows the electro-optic curves in the reflective region to gradually adapt and match the transmissive region via the periodical electrode structure, also to achieve a pre-tilt angle by applying voltage to the curing process of the Polymer Stabilized Liquid Crystal (PSLC), this allows the adjustment of the electro-optic curves and is a much simpler and convenient way compared to others. We also discuss another periodical LC device called Holographic Polymer Dispersed Liquid Crystal (HPDLC). We use two-beam interference lithography to fabricate HPDLC; Also, HPDLC can be used to record holography image. Otherwise, we can apply electric field to change the alignment of LC. That is to say the effective refraction index can be changed. This device can be used in Holography, focus-tunable microlens, and wavelength division multiplexing etc. The last chapter discusses the PDLC produced by high concentration polymer monomer, and how Fabry-Perot Cavity is produced by the latter. We want to take advantage of the high transmission, adjustable reflection and the high-speed reaction to change the transmission of specific wavelengths by applying different voltage within the resonator. This will be used to complement the shortcomings and serve as an excellent optical shutter. | en |
dc.description.provenance | Made available in DSpace on 2021-06-16T04:03:28Z (GMT). No. of bitstreams: 1 ntu-103-R01941109-1.pdf: 3944988 bytes, checksum: d21549b5b6f8c0e07f40c631861c6ab5 (MD5) Previous issue date: 2014 | en |
dc.description.tableofcontents | 口試委員會審定書 #
誌謝 i 中文摘要 ii ABSTRACT iv 目錄 vi 圖索引 ix 表索引 xiii Chapter 1 簡介 1 1.1 何謂液晶 1 1.2 液晶分類 2 1.3 液晶的物理特性 5 1.3.1 液晶的非等向性 (anisotropy) 5 1.3.2 雙折射性 (birefringence) 6 1.3.3 秩序參數 (order parameter) 8 1.3.4 介電常數異方性(dielectric anisotropy, ) 9 1.3.5 連續彈性體理論(elastic continuum theory) 11 1.4 液晶顯示器簡介 12 1.5 穿透式液晶顯示器簡介(Transmissive LCD) 12 1.6 反射式液晶顯示器簡介(Reflective LCD) 14 1.7 半穿透半反射液晶顯示器簡介(Transflective LCD) 14 1.7.1 雙間隙半穿透半反射液晶顯示器 15 1.7.2 單間隙半穿透半反射式液晶顯示器 16 1.8 高分子穩定型液晶(Polymer Stabilized Liquid Crystal, PSLC)介紹 17 1.8.1 高分子穩定型液晶的工作原理 17 Chapter 2 實驗架構 21 2.1 製作與準備過程 21 2.1.1 液晶盒的製作流程 21 2.1.2 高分子穩定型液晶的製作 24 2.2 週期性電極的製作 25 2.2.1 利用蝕刻法製作週期性電極 25 2.2.2 利用蒸鍍配合舉離法(lift-off method)製作週期性電極 27 2.3 週期性電極液晶盒的封裝及原理 30 2.3.1 週期性半穿透半反射式電極的原理 30 2.3.2 部分切換半穿透半反射式電極的原理 30 2.3.3 普通反射式電極的結構 31 2.3.4 三種液晶盒的封裝 32 Chapter 3 週期性電極的實驗結果 34 3.1 實驗架構 34 3.1.1 利用穿透率與電壓的測量觀察相位差改變 34 3.1.2 反射率及電壓關係量測 35 3.2 週期性半穿透半反射式電極 36 3.2.1 週期性半穿透半反射式電極的反射率及電壓關係量測 37 3.2.2 週期性半穿透半反射式電極的穿透率及電壓關係量測 40 3.2.3 週期性半穿透半反射式電極的討論 42 3.3 部分切換半穿透半反射式電極 42 3.3.1 反射層金屬的選擇以及討論 42 3.3.2 部分切換半穿透半反射式電極的反射率及電壓關係量測 45 3.3.3 部分切換半穿透半反射式電極的穿透率及電壓關係量測 46 3.3.4 利用PSLC加入固化電壓調整部分切換半穿透半反射式電極的光電曲線 47 3.3.5 未加入固化電壓之部分切換探討 48 3.3.6 加入2V固化電壓之部分切換 51 3.3.7 加入1.5V固化電壓之部分切換 53 3.3.8 不同固化電壓的改變趨勢 55 3.3.9 部分切換與普通反射式電極加入固化電壓後的比較 56 3.3.10 利用反射率及穿透率反推液晶預傾角 58 Chapter 4 利用雙光干涉製作週期性液晶光柵 60 4.1 高分子分散型液晶簡介 60 4.1.1 高分子分散型液晶的形成原理 61 4.1.2 高分子分散型液晶的工作原理 61 4.1.3 全像光柵的分類 62 4.1.4 全像高分子分散型液晶(Holographic Polymer Dispersed Liquid Crystal, HPDLC)) 65 4.2 實驗架構 65 4.3 實驗結果與討論 67 4.3.1 HPDLC的觀察 67 4.3.2 量測HPDLC之繞射效率與角度之關係 68 4.3.3 實驗結果與討論 70 Chapter 5 (Appendix) 用高分子分散型液晶製作可調變共振腔 71 5.1 介紹法布立-培若共振腔 71 5.1.1 模擬法布立-培若共振腔的工作情形 72 5.1.2 法布立—培若共振腔現實情況討論 74 5.2 實驗結果 75 5.2.1 不同濃度PDLC法布立—培若共振腔的量測結果 76 5.2.2 20% PDLC的特殊波長位移情形 80 Chapter 6 結論與未來目標 85 REFERENCE 87 | |
dc.language.iso | zh-TW | |
dc.title | 具有週期性結構之液晶裝置的研究 | zh_TW |
dc.title | A Study of LC Devices with Periodical Structures | en |
dc.type | Thesis | |
dc.date.schoolyear | 103-1 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 林晃巖(Hoang-Yan Lin),蘇國棟(Guo-Dung Su) | |
dc.subject.keyword | 半穿透半反射式顯示器,週期性電極,法布立-培若干涉儀,高分子穩定型液晶,高分子分散型液晶,液晶,光開關,固化電壓, | zh_TW |
dc.subject.keyword | Transflective display,periodical electrode,Fabry-Perot cavity,polymer stabilized liquid crystal (PSLC),polymer dispersed liquid crystal (PDLC),liquid crystal,optical shutter, curing voltage, | en |
dc.relation.page | 90 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2014-10-07 | |
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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