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博碩士論文 etd-0908110-122232 詳細資訊
Title page for etd-0908110-122232
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
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
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[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).
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