臺灣博碩士論文加值系統

液晶盒參數對於液晶顯示器的光學特性有很大的影響，而目前的文獻中並沒有準確量測反射式垂直排列液晶盒厚度及預傾角的方法。在本篇論文中我們藉由量測液晶層的相位差，經由理論分析可同時得到反射式垂直排列液晶盒的厚度及預傾角。另一方面我們也藉由模擬及實驗上的觀察探討邊際電場在不同畫素大小及畫素間距下對於反射率及對比度的影響。

The optical properties of LCDs are sensitive to the structural parameters of liquid crystal cells. At present, there is no accurate method for the cell gap and pretilt angle measurements of reflective vertical-alignment liquid crystal displays. In this thesis, we proposed a new method to determine both the cell gap and pretilt angle of reflective VA-LCDs simultaneously from phase retardation measurement. On the other hand, we investigate the influences of fringing field effects on the reflectance and the contrast ratio with different pixel sizes and pixel gaps via simulations and experimental observations.

目 錄
中文摘要...............................................i
英文摘要...............................................ii
誌謝...................................................iii
目錄...................................................iv
第一章 緒言...........................................1
第二章 量測原理.......................................3
2-1 相位差量測原理.....................................3
2-2 厚度量測原理.......................................5
2-3 預傾角量測原理....................................10
第三章 實驗..........................................13
3-1 樣品的製作.........................................13
3-2 實驗儀器的架設.....................................16
3-3 量測步驟及注意事項.................................18
第四章 量測結果與討論................................19
4-1 厚度及預傾角量測結果...............................19
4-2 厚度對反應速度的影響...............................22
4-3 討論...............................................24
4-3-1 預傾角對厚度的影響............................24
4-3-2 討論不同區間所外差出的厚度及誤差..............25
4-3-3 評估預傾角的誤差.................................26
4-3-4 分光鏡的影響..................................28
4-3-5 液晶光軸與偏光片夾角有一小角度誤差的影響......29
第五章 邊際電場對於反射率及對比度的影響................31
5-1 模擬不同畫素間距及畫素大小.........................31
5-1-1 畫素為亮暗相間...................................31
5-1-2 畫素全為亮.......................................36
5-1-3 畫素全為暗.......................................37
5-2 實驗觀察結果.......................................38
第六章 結論與展望......................................42
參考文獻...............................................44

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