臺灣博碩士論文加值系統

本論文主要研究光學補償彎曲模式(OCB)應用於扭轉向列 (TN) 以及混合扭轉向列 (HTN)液晶元件，並進行其光電研究。本實驗分為兩大部份，分別為利用添加不同旋光物濃度 ( 0 %wt、0.25 %wt、0.50 %wt、0.75 %wt、1.00 %wt ) 搭配不同厚度 (6μm 、 7μm 、 8μm)試片，研製TN以及HTN顯示元件，並研究OCB模式下的TN以及HTN之白光對不同印加電壓的穿透度、閥電壓、對比度、應答時間、視角等光電特性。
比較不同旋光物濃度( 0 %wt、0.25 %wt、0.50 %wt、0.75 %wt、1.00 %wt )、相同厚度試片，發現添加不同旋光物濃度的TN以及HTN顯示元件的閥電壓雖然比未添加旋光物濃度的TN以及HTN顯示元件略高一點，但是在白光穿透度、對比度、應答時間、視角等光電特性卻有顯著改善效能。
比較不同厚度 (6μm 、 7μm 、 8μm)的試片、相同旋光物濃度，發現隨著試片厚度增大，不同厚度的試片在特定的濃度範圍中，白光穿透度、對比度、應答時間、視角等光電特性會有不同改變。

The optical-electro characteristics of Chiral-Doped Twist Nematic ( TN ) Liquid Crystals and Hybrid Twist Nematic ( HTN ) Liquid Crystals with Optically Compensated Bend mode were investigated (OCB).

This experiment is divided into two major parts in order to utilize adding different concentration of chiral-doped (0.00% wt, 0.25 % wt , 0.50 %wt , 0.75% wt , 1.00 %wt) match different thickness (6μm、7μm 、8μm) , developing TN and HTN and show the component , and the white light of TN and HTN studied under OCB way. To printing the photoelectric characteristic of piercing through degree , voltage of valve , contrast ratio , response time , visual angle etc. with the voltage differently.
Being compared with all chiral-dopen concentration (0.00% wt, 0.25 % wt , 0.50 %wt , 0.75% wt , 1.00 %wt) which the same thickness cell try more differently is add different to all thing TN and HTN of thickness show valve voltage of component though than is all thing TN and HTN of thickness show component a little higher to add to find, but have apparent efficiency of improving to pierce through photoelectric characteristics , such as degree , contrast ratio , response time , visual angle ,etc. in the white light.
Being compared with all the more different thickness (6μm、7μm、8μm) to find that increases with a slice of thickness of trying, different thickness tries one in the specific thickness range, the white light pierces through photoelectric characteristics , such as degree , contrast ratio , response time , visual angle ,etc. to change differently.

誌謝…………………………………………………………………II
中文摘要 …………………………………………………………III
ABSTRACT …………………………………………………………IV
圖索引………………………………………………………………IX
表索引………………………………………………………………XIV
第一章 緒論 ……………………………………………………1
1-1 前言………………………………………………………………1
1-2 研究動機與目的…………………………………………………1
1-3 液晶的發現 ……………………………………………………3
1-3-1 何謂液晶 ………………………………………………4
1-3-2 液晶的分類 ……………………………………………5
1-3-3 向列型液晶 ……………………………………………6
1-3-3-1 向列型液晶的發現與發 ……………………11
1-3-3-2 向列型液晶的物理性質和異方性 …………12
1-3-3-3向列型液晶複折射及光學特性………………13
1-3-4 液晶分子的配列技術 …………………………………17
1-4 ECB彩色液晶顯示元件 ………………………………………19
1-4-1 ECB彩色液晶顯示器的發現 ………………………19
1-4-2 ECB 彩色液晶顯示器的原理 ………………………20
1-4-3 廣視角技術原 ………………………………………24

第二章 OCB彩色液晶顯示器、Chiral Nematic以及HTN與原理 ……………………………………………………25
2-1 Optically Controllable Bend（OCB） …………………………25
2-2 Chiral Nematics …………………………………………………27
2-3 Hybrid Twist Nematic (HTN) mode …………………………29

第三章 OCB模式之HTN、TN參混旋光物實驗方法………………………………………………………………………30
3-1實驗材料 …………………………………………………………30
3-1-2實驗設備 …………………………………………………32
3-2實驗流程 …………………………………………………………34
3-2-1不同濃度的旋光物與液晶混合 …………………………34
3-2-2螺旋節距之測定 …………………………………………35
3-2-3 試片製作 ………………………………………………34
3-2-4穿透率之量測 ……………………………………………40
3-2-5對比度之量測 ……………………………………………41
3-2-6視角之測量 ………………………………………………42
3-2-7應答時間之量測 …………………………………………43

第四章 結果與討論 ………………………………………45
4-1螺旋節距測定之結果與討論 …………………………………46
4-2穿透度、對比度、試片厚度與不同旋光物濃度影響之結果與討論 ………………………………………………………………………50
4-2-1 TN-type ……………………………………………………58
4-2-2 HTN-type …………………………………………………76
4-3 應答時間、試片厚度與不同旋光物濃度影響之結果與討論之結果與討論 …………………………………………………………………77
4-3-1 TN-type …………………………………………………79
4-3-2 HTN-type ………………………………………………81
4-4視角、試片厚度與不同旋光物濃度影響之結果與討論之結果與討論 ……………………………………………………………………92

總結 …………………………………………………………………89
未來展望 …………………………………………………………90
參考文獻 …………………………………………………………91
作者簡介 …………………………………………………………97

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