- 學位論文
奈米粒子誘使液晶垂直配向錨定特性之研究
Study on the Anchoring Properties of Nanoparticle-Induced Vertical Alignment Liquid Crystal Display
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摘要
在學術研究和液晶顯示器的應用上，液晶盒錨定特性有其重要性和需求。實驗發現多面體矽氧烷寡聚物(Polyhedral Oligomeric Silsequioxanes，POSS)奈米粒子可誘使液晶分子垂直配向(Vertical Alignment，VA)。本論文裡將探討以POSS作為配向層，此液晶盒之傾角錨定特性，由於其沒有特定方位角的方向，一般以定向處理過的液晶盒為理論模型的量測方式並不適用。本論文裡，將製作數個以POSS為配向材料，組成無配向的垂直排列液晶盒和混和型配向(Hybrid-Aligned Nematic，HAN)液晶盒；以無配向的垂直排列液晶盒為實驗樣品，利用傾角錨定能(polar anchoring energy)對閥值電壓(threshold voltage)和指向衰減時間(director decay time)的效應，計算出傾角錨定能的大小，以及用混和型配向液晶盒作量測，將其之穿透率對電壓的曲線和模擬軟體的理論曲線作比較，藉此得到POSS的傾角錨定能。經由計算和模擬的實驗結果，得到POSS傾角錨定能為0.00006~0.00009 N/m ，屬於弱錨定能範圍。
並列摘要
The study on the anchoring properties of the liquid crystal cells is an important issue not only in the scientific research but also in the LCD technology. POSS (Polyhedral Oligomeric Silsequioxanes)-induced vertical alignment (VA) in the liquid crystal devices was observed. In this thesis, we studied the polar anchoring properties of the liquid crystal cells applied POSS as an alignment layer. Because the cell with POSS as an alignment layer was azimuth-directionless, methods measuring the polar anchoring energy based on directional LC models were not suitable. In the thesis, we prepared several non-rubbed vertical alignment cells and hybrid-aligned nematic (HAN) cells. For the non-rubbed VA cells, we evaluated the polar anchoring energy by the polar anchoring energy effect on threshold voltage and director decay time; meanwhile, we fitted Transmittance-Voltage (TV) curves of the HAN cells with the simulation curves. According to the experimental and simulated results, the polar anchoring energy was 0.00006~0.00009 N/m . It belonged to weak range.
並列關鍵字
無資料參考文獻
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