臺灣博碩士論文加值系統

本論文主要研究240°超扭轉(Super Twist Nematic；STN)液晶盒配向層摻雜不同濃度奈米級粒子ITO的光電特性，了解摻雜奈米粒子對液晶盒中離子電荷吸附效應的影響。
本文主要研究包括: 1.施加高壓靜電於液晶盒，當靜電放電ESD效應產生時，造成影像殘留；2.驅動時離子電荷會吸附到液晶層與配向膜之間的界面，形成內建電場，這將影響液晶元件的VHR、 R-DC、臨界電壓等光電特性。
從本文實驗中結果可得:1.隨著濃度增加，離子電荷吸附效應越小，進而改善ESD效應但並不會改變VHR及R-DC值；2.量測穿透率變化，發現摻雜奈米粒子並不會改變臨界電壓；3.由光學及電學響應建立出液晶盒等效電路模型。

The purpose of this thesis is to study effects of nano-particle-doped polyimide on liquid crystal cells, to understand influence of nano-particle-doped polyimide on liquid crystal cells of interface trapped ions.

The purpose of this thesis is including that 1. When high voltage static electricity is input on liquid crystal cells, image sticking is induced by Electro-Static Discharge. 2. The ions accumulate on the interface between polyimide and LC that can induce the phenomenon interface trapped ions in LC, this will influence the optical and electric property of liquid crystal cells.

In our Experimental results, we found that 1. When nano-particle-doped concentration increase, the phenomenon interface trapped charge is less that can improve the duration of image sticking caused by ESD but can not influence voltage holding ratio and residual DC. 2. There doesn’t find any relations between threshold voltage of nano-particle-doped different concentrations. 3. From optical and electric measurement we establish the model of interface trapped ions in LC.

摘 要i
Abstractii
致 謝iii
目 錄iv
圖目錄vii
縮寫及符號對照表xi
第一章 緒論1
1.1 前言1
1.2 文獻探討2
1.2.1 奈米級粒子介紹2
1.2.2 電雙層模型8
1.2.3 ESD的基礎理論10
1.2.4 VHR及R-DC量測法12
1.2.5 接觸面補抓電荷17
1.3 論文研究重點及目的18
第二章 實驗方法19
2.1 光學量測19
2.2 電學量測20
2.2.1 ESD量測儀器及方法20
2.2.2 VHR及R-DC量測儀器及方法21
2.2.2.1 實驗架設可靠度測試、樣品測試25
2.3 配向層摻雜不同濃度奈米級粒子ITO實驗樣品28
第三章 實驗結果29
3.1 Sample1實驗樣品做穿透率、VHR、R-DC量測29
3.1.1 穿透率量測29
3.1.2 VHR量測32
3.1.3 R-DC量測33
3.2 Sample2實驗樣品做ESD、VHR、R-DC量測35
3.2.1 ESD量測35
3.2.2 VHR量測36
3.2.3 R-DC量測38
3.3 實驗結果分析討論39
第四章 實驗與模擬41
4.1 光學41
4.2 電學44
4.2.1 VHR實驗與模擬44
4.2.2 ESD 實驗與模擬55
第五章 結論與未來展望60
第六章 參考文獻61
附錄一 電子顯微鏡下的碳奈米管63
附錄二 儀器設備規格(ESD Simulator) 64
附錄三 稀釋不同濃度之ITO的PI溶液數據表66

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