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姓名	張舒晴(Shu-Ching Chang)  查詢紙本館藏	畢業系所	光電科學與工程學系
論文名稱	具備隱私保護特性顯示器之設計及利用液晶摻雜二色性染料製作非對稱穿透式智慧窗 (Designs of display with privacy protection property and fabrications of asymmetrical transmission smart windows based on dye-doped liquid crystals)
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檔案	[Endnote RIS 格式]    [Bibtex 格式]    [相關文章]   [文章引用]   [完整記錄]   [館藏目錄]   至系統瀏覽論文 (2027-6-30以後開放)
摘要(中)	本論文研究主題為提供隱私保護之液晶光電元件，全文共分為三部分，第一部分針對智慧窗進行研究，提出利用二色性染料摻雜液晶製作非對稱穿透式智慧窗，將二色性染料摻雜於液晶中，以LED燈泡搭配不同波段之窄頻濾波片組合為室內光源；室外參考光源D65乃為一寬頻光源，透過寬頻室外光源與窄頻室內光源經染料吸收後之穿透光譜差異，達到非對稱穿透式智慧窗之效果。因實驗上無法達成理想之非對稱效果，同時利用程式進行數值模擬，設計不同室內光源及染料吸收光譜，且將室內參考光源訂為6500K及3000K，室外參考光源訂為D65，用以優化智慧窗系統達成理想之非對稱效果。 本論文第二及第三部分係為隱私保護顯示器之研究，並將其細分為兩方向，其一為利用線性偏振光特性製作資訊保護液晶顯示器；其二為利用圓偏振光特性製作資訊保護顯示器。第二部分透過輸入隱藏資訊至反射式空間光調制器(reflective liquid crystal SLM，簡稱RLC-SLM)，使其提供二分之一波板之功能以調制入射RLC-SLM之線偏振光，顯示隱藏資訊與未顯示隱藏資訊部分之反射光偏振態將互相正交，輔以檢偏器即可見隱藏資訊。此外，將RLC-SLM置於偏光顯微鏡下觀察，推斷實驗上未使用檢偏器即可見隱藏資訊之問題為畫素間液晶排列不同導致。第三部分分為實驗及畫素設計兩者，實驗上利用寬頻四分之一波板薄膜將出射顯示器之線偏振光調制為圓偏振光，並透過由寬頻四分之一波板薄膜與線偏振片組合之圓偏振片達成隱私保護之效果。畫素設計的部分，將兩畫素合併為一複合畫素，於其上黏貼兩快軸軸向相互正交之寬頻四分之一波板薄膜，使奇數與偶數行畫素出射圓偏振光之旋性相反，透過調整點亮奇數或偶數行畫素，並搭配前述之圓偏振片，即可達成隱私保護顯示器之效果。
摘要(英)	The research topic, divided into three sections, of this thesis is about liquid crystal (LC) optoelectronic devices which provide the property of privacy protection. In the first section, we propose an asymmetrical transmission smart window based on dichroic dyes-doped LC. A LED light bulb and narrow-band filters for different wavelengths are combined to be the indoor light source. The standardized light, D65, is a broadband light source used as the outdoor light source. Asymmetrical property of the smart window can be achieved through the difference of transmission spectra between narrow-band indoor light source and broadband outdoor light source when the both light sources penetrate through the smart window from opposite sides. Since the ideal asymmetrical property could not be easily obtained experimentally, numerical simulations are conducted using the program to design different indoor light sources and dyes with suitable absorption spectra to optimize the smart window system ideally. For simulation, the indoor reference light sources with color temperatures of 6500K and 3000K are selected, and the outdoor reference light source is set to be the standardized light, D65. The second and third sections in this thesis report two types of displays with privacy protection which are designed according to the properties of linearly polarized light and circularly polarized light. Briefly, the privacy information is displayed on a reflective liquid crystal spatial light modulator (RLC-SLM), playing the role of a half-waveplate to modulate the polarization state of the reflective light. Therefore, the polarization states of the reflective lights with and without the privacy information are mutually orthogonal, which is the key point of the display reported in the second section. In addition, the reflective SLM with the displayed information has also been observed under a polarized optical microscopy (POM). According to the observation, it can be concluded that the visible privacy information, which can be viewed on the screen without any analyzer in the experiment, is caused by the differences of LC alignment between the adjacent pixels experimentally. The third section is subdivided into two parts for detailed discussion, including experiments and pixel-designs. In the experiment part, the linearly polarized light emitted from the display is modulated to circularly polarized light by using a broadband quarter-waveplate film. To accomplish the property of privacy protection, the combination of the broadband quarter-wave plate film and the polarizer to be a circular polarizer is needed. For the pixel design, the two pixels in odd and even rows are combined into one composite pixel beneath different broadband quarter-waveplate films with two orthogonal fast axes, so that the pixels in odd and even rows emit circularly polarized light with opposite handednesses. Finally, with the adjustment of the output light intensities of the pixels in odd and even rows, the privacy information can be viewed on the privacy-protected display with a circular polarizer.
關鍵字(中)	★ 液晶 ★ 隱私保護顯示器 ★ 智慧窗戶	關鍵字(英)
論文目次	摘要 i Abstract ii 致謝 iv 圖目錄 vii 表目錄 xi 符號說明 xii 第一章 緒論 1 § 1-1 前言 1 § 1-2 研究動機 1 § 1-3 文獻回顧 2 § 1-3-1非對稱穿透式窗戶[2] 2 § 1-3-2利用線偏振及圓偏振光製作隱私保護元件[3] 4 § 1-4 論文架構 7 第二章 液晶簡介 9 § 2-1 液晶的定義 9 § 2-1-1液晶歷史[4][5] 9 § 2-1-2 物質狀態分類 10 § 2-2 液晶分類[4] 11 § 2-2-1 向列型液晶(Nematics) 12 § 2-2-2 層列型液晶(Smectics) 13 § 2-2-3 膽固醇型液晶(Cholesterics，簡寫N*) 15 § 2-3液晶物理特性 16 § 2-3-1光學異向性(Optical anisotropy)[11] 17 § 2-3-2介電異向性(Dielectric anisotropy)[11] 22 § 2-3-3連續彈性體理論(Elastic Continuum Theory)[12] 24 第三章 實驗相關理論 26 § 3-1 CIE 1931色域座標圖[14][15] 26 § 3-1-1三色刺激值(Tristimulus values) 26 § 3-1-2色彩匹配函數(Color matching functions) 27 § 3-2 二色性染料(Dichroic dyes)[17] 29 § 3-3 賓主效應(Guest-host effect) [18][19] 30 § 3-3-1 Heilmeier-Zanoni cell[17] 30 § 3-4比爾-朗伯定律(Beer-Lambert law)[20] 31 § 3-5光的偏振[21] 32 § 3-5-1線性偏振片 32 § 3-5-2四分之一波板 33 § 3-5-3馬呂斯定律(Malus′ law) 34 第四章 實驗方法與製程 36 § 4-1 材料介紹 36 § 4-1-1正型向列型液晶 E7 36 § 4-1-2二色性染料 37 § 4-2 液晶空間光調制器(Spatial light modulator) 38 § 4-2-1儀器基本規格 38 § 4-3 實驗樣品製作 39 § 4-3-1材料配置 39 § 4-3-2液晶盒製作過程 39 § 4-3-3液晶盒厚度量測 39 § 4-4 實驗流程 42 § 4-4-1二色染料摻雜液晶智慧窗戶設計 42 § 4-4-2利用線性偏振光特性製作資訊保護液晶顯示器 43 § 4-4-3利用圓偏振光特性製作資訊保護液晶顯示器 44 § 4-5 實驗架設 44 § 4-5-1二色染料摻雜液晶智慧窗戶設計 44 § 4-5-2利用線性偏振光特性製作資訊保護液晶顯示器 45 § 4-5-3利用圓偏振光特性製作資訊保護液晶顯示器 46 第五章 結果與討論 48 § 5-1 利用二色性染料摻雜液晶製作非對稱穿透式智慧窗 48 § 5-1-1利用二色性染料摻雜膽固醇液晶製作非對稱穿透式智慧窗 48 § 5-1-2染料摻雜液晶盒的設計與製作 48 § 5-1-3最佳化染料摻雜液晶盒製作之非對稱窗戶系統 53 § 5-2 利用線性偏振光特性製作資訊保護液晶顯示器 66 § 5-2-1 RLC-SLM系統之灰階調控 66 § 5-2-2利用線偏振光特性隱藏資訊 70 § 5-2-3此資訊保護液晶顯示器的優缺點 74 § 5-3 利用圓偏振光特性製作資訊保護液晶顯示器 75 § 5-3-1利用圓偏振光特性隱藏資訊 75 § 5-3-2設計畫素以實現資訊保護液晶顯示器 78 第六章 結論與未來展望 83 § 6-1 結論 83 § 6-1-1 利用二色性染料摻雜液晶製作非對稱穿透式智慧窗 83 § 6-1-2 利用線性偏振光特性製作資訊保護液晶顯示器 84 § 6-2 未來展望 85 參考文獻 87
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指導教授	鄭恪亭(Ko-Ting Cheng)	審核日期	2022-7-5
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