臺灣博碩士論文加值系統

本論文使用電壓保持率（Voltage Holding Ratio，VHR）的方法來量測摩擦ITO為配向層的液晶盒樣品分別在不照射紫外光和照射波長365 nm的紫外光下之離子特性，以分析紫外光對液晶盒中產生離子的影響。
藉由VHR的量測和解析解的模型可以得到液晶盒中高、低解離率離子的初始濃度和離子遷移率，並在不同溫度下量測以得到離子解離及遷移時所需的活化能。
比較其結果，可發現在未照射紫外光時僅含有低解離率離子的液晶盒樣品，在經過紫外光照射後，會額外產生高解離率離子，而原本的低解離率離子之物理特性也會做相當程度的改變。

To analyze the effect of UV-induced generation of ions in a rubbed ITO-aligned TN cell, we have measured and analyzed the VHR (voltage holding ratio) data obtained from the TN cell with and without UV-illumination.
Using the theoretical model for the ion generations from HIR (high-ionization-rate) and LIR (low-ionization-rate) impurities within the LC mixture to fit the measured VHR data, we can derive initial ion concentration and ion mobility for HIR and LIR ions within the TN cell. By analyzing the VHR data measured at three different temperatures, we have obtained the corresponding ion concentrations and activation energies of ion-dissociation and ionic mobility of the LC mixture within the TN cell with and without UV illumination.
The results of our investigation have showed that most of ions existed in the rubbed ITO-aligned TN cell without UV illumination were from LIR impurities. However, after UV illumination, plentiful HIR ions have been generated in the TN cell, and the physical properties of the LIR ions existed before UV-illumination have been altered slightly by the UV-illumination.

中文摘要 …………………………………………………ⅰ
英文摘要 …………………………………………………ⅱ
致謝 ………………………………………………………ⅲ
目錄 ………………………………………………………ⅳ
表目錄 ……………………………………………………ⅵ
圖目錄 ……………………………………………………ⅶ
符號說明 …………………………………………………ⅸ
一、緒論………………………………………………… ……1
1.1 前言……………………… …………… ……………1
1.2 離子效應模型……………………………… …… …2
1.3 離子效應的影響………… ……………………… …4
1.3.1 電壓保持率下降………………………… …… 4
1.3.2 臨界電壓增高………………………… ……… 4
1.3.3 影像殘留…………………………… ………… 5
1.4 離子的產生與UV光在製程上的應用…………………6
1.4.1 光配向……………………………………………6
1.4.2 PSA(polymer sustained alignment)…………9
1.5 論文研究重點以及目的………………………………10
二、理論與實驗部分………………………………………… 12
2.1 高、低解離率離子的概念……………………………12
2.2 高解離率離子(HIR)………………………………… 13
2.3 低解離率離子(LIR)………………………………… 15
2.4 實驗架構………………………………………………18
2.5 實驗量測………………………………………………21
三、實驗結果與分析………………………………………… 24
3.1 樣品1實驗結果與分析……………………………… 25
3.2 樣品2實驗結果與分析……………………………… 31
3.3 照射UV光對樣品離子的影響…………………………36
四、結論與未來展望………………………………………… 39
參考文獻 ………………………………………………………41

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