軟性液晶顯示器之結構分析及可靠度評估

Structural Analysis and Reliability Evaluation of Flexible Liquid Crystal Display Structure

張立酉(Li-Yu Chang)

指導教授 ： 葉孟考

國立清華大學/工學院/動力機械工程學系/碩士(2013年)

摘要

近年來科技產品日新月異，「能夠更有效地提高科技產品攜帶之便利性」成為了影響元件製造研發上重要的考量。而軟性液晶觸控顯示器因為其結構具有較輕薄、可彎曲等特性在未來各種科技產品不斷追求重量輕、厚度薄、體積小等特質下具有一定的競爭力。本研究著重於軟性液晶觸控顯示器中的液晶顯示結構，在結構受到三點彎曲時之結構分析與可靠度評估。本研究利用有限單元分析軟體ANSYS®，對液晶顯示層當中之PET/ITO/AAO及包含液晶之疊層結構進行三點彎曲模擬分析以及材料受外力後產生降伏破壞等分析。實驗方面透過Instron 8800材料試驗機進行PET/ITO疊層結構試片之三點彎曲實驗，並將實驗結果與模擬結果相互比較分析。
　　根據研究成果，經三點彎曲分析後結構中ITO層為其中最先達到降伏之材料，而具奈米孔洞多孔性陽極氧化鋁AAO受彎曲行為下，孔洞內側有應力集中現象，實驗部分之PET/ITO疊層結構其三點彎曲之破壞應力值為87.84 MPa。本研究之成果可做為軟性液晶觸控顯示器開發上相關研究之參考。

關鍵字

軟性液晶觸控顯示器 ； 有限單元法 ； 三點彎曲 ； 降伏破壞 ； 三點彎曲實驗

並列摘要

With the technology changing rapidly in recent year, the need “to increase the convenience of carrying the high-tech products” has become more and more important in devices producing. The characteristics of light, thin and bendable Flexible LCD Touch Display, make it more competitive on its market in the future. This study focused on the structural analysis and reliability evaluation of the Flexible LCD Display under three point bending. The simulation of PET/ITO/AAO laminate and LCD structure under three point bending, and then failure analyses are presented in this study by the finite element analysis using software ANSYS®. The experiment on the PET/ITO laminate under three point bending were performed using the material testing machine-Instron 8800, and the experiment of result are compared with the results from the simulation.
According to this study, the ITO will be yielded first during the analysis of PET/ITO/AAO laminate under three point bending. The AAO have stress concentration on the inner side of the hole after bending. The failure stress of PET/ITO laminate is about 87.84 MPa from three point bending experiment. And the results this research can be used as a reference in the development of the Flexible LCD Touch Display.

並列關鍵字

Flexible LCD Touch Display ； Finite Element Analysis ； Three Point Bending ； Yielding Failure ； Three Point Bending Experiment

參考文獻

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