The paper aims at building a history-friendly model which replicates the history of the Thin Film Transistor-Liquid Crystal Display (TFT-LCD) industry focusing the crystal cycle and co-evolution of demand, technology and industrial structure. The most interesting characteristic of the TFT-LCD industry is the cyclical behavior of the price and investments. The model is distinctive compared to ex...

Purpose – This paper seeks to construct a model for inventory management for multiple periods. The model considers not only the usual parameters, but also price quantity discount, storage and batch size constraints. Design/methodology/approach – Mixed 0-1 integer programming is applied to solve the multi-period inventory problem and to determine an appropriate inventory level for each period. T...

This paper propose to see how the center based car navigation systems are practical in terms of using real time traffic information and guiding the way with different media of both of the Turn by Turn and the digital map service. The systems have been applied to all the road networks in Korea but the traffic actuated car navigation systems are mainly applicable to the road networks in the Seoul...

− A stepwise driving method was used for reducing the AC power consumption in a TFT-LCD. The AC power takes the largest portion of the total power consumption of a TFT-LCD. Experimental results confirmed that the AC power saving efficiency reached up to 75% when a 5-stepwise driving with each step time of 2μ sec was applied to a 14.1 inchdiagonal XGA TFT-LCD. The second largest component of pow...

Due to the progress of high technology, TFT-LCD (Thin Film Transistor – Liquid Crystal Display) has been widely put in use recently. The manufacturing technology of the TFT-LCD industry mainly consists of array, cell, module processes, in which there exists special characteristics such as different objectives of individual process’s scheduling, complexity of manufacturing processes, and multi-s...

In the study of polyvinyl alcohol (PVA) alignment layers for liquid crystal devices, we found that the anchoring strength can be greatly varied by changing the alignment film thickness. Both the polar and azimuthal anchoring strengths increased with increasing film thickness; however, they had different film thickness dependences. It was also noticed that the quartic term in the expansion of th...

The defect inspection station is one of the major processes in module assembly stage of TFT-LCD panel manufacturing. Because this process is usually examined manually through human vision, its cycle time estimation is more uncontrollable and therefore could easily affect the customer response time. Hence, this study would like to apply Bayesian networks approach to establish a reliable cycle ti...

The increasing use of TFT-LCDs has generated a great deal of interest in manufacturing defects on TFT-LCD polarizing film because the poor quality of TFT-LCD polarizing film result in undesirable effects on the TFT-LCD display devices. In this paper, we propose a new inspection method that reliably detects various defects of TFT-LCD polarizing films. First, we apply a least mean squares adaptiv...