液晶顯示器由於視角狹小的特性，通常需貼附相位補償膜以增廣視角。但此相位補償的方式須考慮液晶盒與補償膜結構參數的最佳化，才有良好的補償效果。
本論文主要研究OCB高/低預傾角液晶盒貼附相位補償膜之視角特性。為了解析OCB液晶盒與補償膜的結構參數，我們使用穆勒矩陣偏光儀當作量測設備;在補償膜的部份，我們參考TN補償膜的折射率與基材厚度當作已知條件，可擬合出一合理的結構參數。而OCB液晶盒的部分，在折射率已知的情況下，可得到未加電壓下的結構參數。另外，我們將量測的結構參數代入軟體進行視角圖模擬，並與實際拍攝的視角圖比較。其中，高/低預傾角OCB液晶盒於未補償下的模擬對比圖與實測圖相當吻合，但低預傾角OCB液晶盒於貼附補償膜下的模擬對比圖則與實測圖有落差。這顯示OCB液晶盒的結構參數是可靠的，而補償膜的結構參數或色散關係則尚未能驗證其正確性。

Because liquid crystal displays (LCDs) possess an intrinsic drawback of narrow viewing angles, attaching compensation films on them is a popular and efficient method to resolve this problem. However, it is very important that the ideal compensation condition must be satisfied between LC cell and compensation films to achieve the wide viewing angles. Therefore, analyzing the structures of LC cells and compensation films is needed.
In this thesis, we mainly study the viewing angle characteristics of high/low pretilt angle OCB (optically compensated bend) LC mode with compensation film attachment. We used the Mueller matrix polarimeter to analyze structural parameters of LC cells and compensation films. For analyses of compensation films, the fitting results based on known refractive indices of discotic molecules and film thickness showed a hybrid structure of compensation films. For analyses of OCB cells, the fitting results based on known LC refractive indices showed the non-voltage applied cell structures including pretilt angles and cell gaps etc. We took the analyzed data into simulation processes and compared viewing angle characteristics between simulated and real cells. We founded it is very consistent between simulation and real measurement on OCB cells without compensation film attachment. But, it is a significant difference between them on OCB cells with compensation film attachment. It means that the structural parameter for the OCB cell is reliable, but the structural parameter or the dispersion relation for these compensation films is not determined exactly yet.

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