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KEYWORDS
Preheating-process;
Black matrix area;
Polarizer plate.
Abstract. 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.
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(ProQuest: ... denotes formulae omitted.)
1. Introduction
The polarizer plate is an undeniably important component in the production of the TFT (thin film transistor)-LCD (liquid crystal display). The TFTLCD polarizer plate attaching process uses the attaching roller of a PU (Polyurethane) surface material to evenly attach the two polarizer plates onto the glass substrate [1]. Lin et al. listed many production defects that may occur which affect the performance of the LCD product [2]. In the LCD polarizer plate attaching process, the prevalent problem of bubbles between the glass substrate and the polarizer plate, due to uneven attachment, often causes quality deviations in the LCD of color image light leakage. Lin et al. proposed a method to evaluate the fracture and deformation status of conducting particles of anisotropic conductive film in the TFT-LCD assembly process [3]. Takatsuji and Arai found that holes in Al thin films will affect the TFT characteristics [4]. Jeong et al. proposed a simple method for computing production requirements for each step, where daily production demand is unknown [5]. Lin et al. found the types of TFT in TFT-LCD vary with different glass substrates; the pattern of each TFT is significantly different from its peripheral circuit wiring [6]. The reason for the polarizer plate process being hard to control is because the polarizer plate is a softmaterial, with a width of about 22 ~ 35 µm,...