Reliability Analysis of Liquid Crystal Displays Due to Drop Impacts

• Main Authors: Ming-shung Wang, 王明舜
• Other Authors: Sen-Lin Lu
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/a3aq7s

碩士 === 國立臺灣科技大學 === 機械工程系 === 94 === The main purpose of this thesis is to study the dynamic response and the reliability of LCD experienced a drop impact. In the analysis the LCD is represented by a rectangular plate and the drop height is considered as a random variable. A two-degree-of-freedom damped system is used to approximate the LCD equipped electronic system. The two degrees can be used to represent a LCD mounted within the chasis. The chasis represents the first degree of freedom, and the LCD the second. Accordingly the displacements and the accelerations of the chasis and the support contour of the plate element can be evaluated assuming that these components are rigid. Furthermore, we will take into account the fact that the plate element is an elastic body which is clamped into the gasket. The superposition method developed by Gorman is applied to analyse the eigenvalue problem of vibration systems, and the bending stress of elastic plate element is solved using the relation of stress and strain. The effects of spring and damping constants of the support on the maximum displacement stop distance, the maximum acceleration of the contour of the plate element, and the induced bending stress due to an accident drop respectively, will be examed in this study.