Improvement of TFT-LCD's polarizer plate bubble problem using a preheating-process


1 Department of Automatic Control Engineering, Feng Chia University. Taichung, Taiwan

2 Dept. of Electronic Engineering, National Chin-Yi University of Technology, Taichung, Taiwan

3 Department of Mechanical Engineering, China Institute of Technology, Taipei, Taiwan


In this study, improvement of the polarizer plate bubble in the thin film transistor liquid crystal display process, especially where the polarizer plate is attached to the black matrix area at the end of the glass substrate, is presented. This study proposed temperature control functions during the attaching process using the preheating operations of pressure sensitive adhesives and a pre-existing warp polarizer plate. The polarizer plate is softened evenly, and, then, the bubbles can be discharged smoothly in the attaching process. Three main control factors are used in the polarizer plate  attachment process, using an experimental design method, to determine the best combination of parameters. By applying optimal parameters in the experiments, bubble width can be decreased by 60.49%, compared with that of the previous process.