TFT-LCD TV Back Cover Research for the Optimization of Warpage

• Main Authors: Yung-Lung Cheng, 鄭詠隆
• Other Authors: Wen-Ren Jong
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/88286249980969860266

碩士 === 中原大學 === 機械工程研究所 === 97 === Abstract Through the rapid progress of technology, the size of LCD get larger and the exterior of product are two main concern of TV. Thus, CRT Monitor has been gradually replaced by light TFT-LCD TV. For 3C market is gradually mature and competitive, the demand of exterior, complexity of product, and the quality of the product are all raised. To decrease the error of mold design and shorten time, the experiences and inheritances of designers and aged engineers are trusted in product design. Through tests, the standards of mold design and product quality have been set up. However, the complicate of TFT-LCD TV formation can’t be manufactured easily. The purpose of this study is to discuss the 28 inch TFT-LCD TV products that might make warpage abnormal with products in the molding development which belong to appearance of back cover plastic injection molding. Moldflow is used to analysis TFT-LCD TV back cover and finding out the best parameter setup of TFT-LCD TV, for its outstanding ability on plastic mold analysis. Through the analysis、mold temperature、compressed pressure、cooling time and dissolved plastic liquid temperature are the for crucial parameters that affects warpage abnormal. Moreover, Taguchi Optimization Methods is also used to find out Smaller-is-better. According to the study, the smallest parameter setup of warpage could prevent the exterior from out of shape product which could help to reduce the cost、the usage of material. It could increase the competitive the ability of products at the same time. Finally, it would give a contribution on TFT-LCD TV in the future by comparing the result between the best parameters set up and actual result.