論文使用權限 Thesis access permission:校內立即公開,校外一年後公開 off campus withheld
開放時間 Available:
校內 Campus: 已公開 available
校外 Off-campus: 已公開 available
論文名稱 Title |
液晶分子方位三維控制之視角可切換顯示器 Viewing angle switchable displays based on three-dimension control of liquid-crystal orientation |
||
系所名稱 Department |
|||
畢業學年期 Year, semester |
語文別 Language |
||
學位類別 Degree |
頁數 Number of pages |
79 |
|
研究生 Author |
|||
指導教授 Advisor |
|||
召集委員 Convenor |
|||
口試委員 Advisory Committee |
|||
口試日期 Date of Exam |
2010-07-10 |
繳交日期 Date of Submission |
2010-09-08 |
關鍵字 Keywords |
視角、顯示器 light leakage, contrast ratio, viewing angle switching |
||
統計 Statistics |
本論文已被瀏覽 5733 次,被下載 1477 次 The thesis/dissertation has been browsed 5733 times, has been downloaded 1477 times. |
中文摘要 |
我們在這篇研究裡提出一種有視角可切換(switchable viewing-angle)能力的顯示器,此顯示器的對比值(contrast ratio)主要依賴於亮態和暗態的穿透度。藉由改善畫素電極結構來切換此顯示器的廣窄視角顯示模式。依據所提出的三通道電極(three-electrode)結構,由控制液晶分子指向(liquid-crystal orientation)在大角度方向下產生不同漏光(light-leakage)情況,來切換此顯示器之視角。我們提出的結構能簡單的達到控制顯示器的視角,而且具有輕薄的外框和較低的製作成本,適合用於個人隱私保護的應用上。 |
Abstract |
In this study, a liquid-crystal display (LCD) with the capability of switchable viewing-angle is proposed. The contrast ratio of the LCD mainly depends on the transmittance of the bright state and the dark state. By using the improved structure of the pixel electrodes, the viewing angle of the LCD can be switched between the wide viewing-angle mode and the narrow-viewing angle mode. Based on the proposed three-electrode structure, the liquid-crystal orientation of the LCD is controlled to generate different light-leakage conditions at large viewing angles, thus, resulting in the switch of the viewing angle of the LCD. The proposed structure, which has the slim outline and low-cost of the LCD, is a simple way to control the viewing angle of the LCD. Potential applications for the protection of personal privacy are emphasized. |
目次 Table of Contents |
摘要----------------------------------------------------------------------------------i Abstract-----------------------------------------------------------------------------ii Acknowledgement ---------------------------------------------------------------iii Contents----------------------------------------------------------------------------iv List of Figures --------------------------------------------------------------------vi Chapter 1 Introduction 1.1 Liquid crystal display technology ---------------------------1 1.2 Wide viewing angle technology -----------------------------3 1.2-1In-plane switching ----------------------------------------4 1.2-2 Another wide viewing technology ---------------------6 1.3 Viewing angle switching technologies -----------------------9 1.4 Motivation and objective -------------------------------------10 1.5 Organization of this thesis -----------------------------------10 Chapter 2 Principles 2.1 Physical properties of liquid crystal ------------------------11 2.2 Anisotropy physical properties ------------------------------13 2.3 Optical birefringence -----------------------------------------14 2.4 Dielectric anisotropy -----------------------------------------16 2.5 Phase retardation effect --------------------------------------18 2.6 Viewing angle characteristics -------------------------------21 2.7 TechWiz LCD simulation software ------------------------22 2.8 Summary -------------------------------------------------------25 Chapter 3 Devices fabrication and measurement 3.1 Devices fabrication -------------------------------------------26 3.2 Measurement system -----------------------------------------29 3.3 Summary -------------------------------------------------------30 Chapter 4 Simulation and experiment results 4.1 Design of three-terminal electrode configuration --------31 4.2 Operation principle and viewing angle control -----------36 4.3 Electrical potential distribution estimation ----------------39 4.4 WVA mode and NVA mode ----------------------------------43 4.5 Simulation results of viewing angle switching ------------47 4.6 Inter-digitated electrode width and separation gap -------54 4.7 Experimental results ------------------------------------------60 4.8 Summary -------------------------------------------------------65 Chapter 5 Conclusions and future work 5.1 Conclusions ----------------------------------------------------66 5.2 Future work ----------------------------------------------------66 Reference -------------------------------------------------------------------------67 |
參考文獻 References |
[1] C. H. Park, S. H. Lee, J. K. Jeong, K. J. Kim, and H. C. Choi, Appl. Phys. Lett. 89, 101119 (2006). [2] A. Takeda, S. Kataoka, T. Sasaki, H. Chida, H. Tsuda, K. Ohmuro, Y. Koike, T. Sasabayashi, and K. Okamoto, Soc. Info. Display Symp. Digest, 29, 1077 (1998). [3] S. G. Kim, S. M. Kim, Y. S. Kim, H. K. Lee, S. H. Lee, G. D. Lee, J. J. Lyu, and K. H. Kim, Appl. Phys. Lett. 90, 261910 (2007). [4] S. H. Lee, S. H. Park, S. T. Oh, M. H. Lee, and G. D. Lee, Appl. Phys. Lett. 86, 031108 (2005). [5] M. Oh-e, and K. Kondo, Jpn. J. Appl. Phys. 36, 6798 (1997). [6] S. H. Lee, S. L. Lee, and H. Y. Kim, Appl. Phys. Lett. 73, 2881 (1998). [7] M. S. Kim, S. M. Seen, and S. H. Lee, Appl. Phys. Lett. 90, 133513 (2007). [8] E. Jeong, Y. J. Lim, J. M. Rhee, S. H. Lee, G. D. Lee, K. H. Park, and H. C. Choi, Appl. Phys. Lett. 90, 051116 (2007). [9] K. W. Chien, Y. J. Hsu, and H. M. Chen, SID Int. Symp. Digest Tech. Papers 37, 1425 (2006). [10] H. S. Jin, H. S. Chang, J. K. Park, S. K. Yu, D. S. Lee, and I. J. Chung, SID Int. Symp. Digest Tech. Papers 37, 729 (2006). [11] Y. J. Lim, E. Jeong, M. H. Chin, S. H. Ji, G. D. Lee, and S. H. Lee, J. Phys. D: Appl. Phys. 41, 085110 (2008). |
電子全文 Fulltext |
本電子全文僅授權使用者為學術研究之目的,進行個人非營利性質之檢索、閱讀、列印。請遵守中華民國著作權法之相關規定,切勿任意重製、散佈、改作、轉貼、播送,以免觸法。 論文使用權限 Thesis access permission:校內立即公開,校外一年後公開 off campus withheld 開放時間 Available: 校內 Campus: 已公開 available 校外 Off-campus: 已公開 available |
紙本論文 Printed copies |
紙本論文的公開資訊在102學年度以後相對較為完整。如果需要查詢101學年度以前的紙本論文公開資訊,請聯繫圖資處紙本論文服務櫃台。如有不便之處敬請見諒。 開放時間 available 已公開 available |
QR Code |