穿透式與反射式扭轉向列相液晶盒的光學性質 模擬與探討

Optic Simulation and Discussion of Transmitive and Reflective Twisted Nematic Liquid Crystal Cells

張家福(Chia-Fu Chang)

指導教授 ： 莫定山 ； 葛聰智

崑山科技大學/工程學院/電子工程研究所/碩士(2006年)

摘要

為了能夠讓顯示器的光電表現更完美，所以作光學性質模擬與探討。本論文便是在研究一般扭轉向列型液晶盒的光學性質模擬與探下，分別對穿透式扭轉向列型液晶盒，反射式扭轉向列型液晶盒，等作精準的量測，而介紹的量測方法裡，都是在液晶樣品盒前後各放一片即是偏振片，以旋轉偏振片方法得到的穿透強度與反 射強度，經由所得數值作光學性質的探討。光學性質的探討中，以討論關於穿透式與反射式扭轉向列相液晶盒的光學性質模擬與探討。其中即便針對穿透式扭轉向列相液晶盒，並且改變參數如扭轉角......等等討論其模擬結果。

關鍵字

扭轉向列相液晶盒

並列摘要

This thesis researches the measurement methods of cell gaps of LCDs employed commonly. We establish simple and precise cell- gap measurements of a transmissive twisted nematic LC cell anreflective twisted nematic and non-twisted LC cells. The experimental method we use is to place the LC cell between two polarizers and then rotating the polarizers to get transmittance and reflectance.In a LCD ( liquid crystal display ), the cell gap plays an important role in determining its performances, such as brightness, contrast ratio, and response time. In parti cular, a reflective LCD cell gap is usually smaller than
a transmissive LCD one, so a little deviation of the cell gap from the desired one leads to poor performances. Dur ing the device fabrication, the LC cell gap may deviate from its designed value. Accurate cell gap can be obtained by fitting the experiment value with the calculation using Jones Matrix. For optimizing the performances of LCDs in the manufacturing process, simple, precise, and fast methods to measure the cell gap is required.

並列關鍵字

Nematic Liquid Crystal

參考文獻

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