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이황주(Hwang-Ju Lee),박태형(Tae-Hyoung Park) 제어로봇시스템학회 2017 제어·로봇·시스템학회 논문지 Vol.23 No.4
We propose a mura defect detecting method for the display panel inspection machines. Detecting the mura defects of display panel is difficult due to non-uniform brightness background and slightly different brightness levels between the defect region and the background. In order to separate the background and the defect region, we developed a new reconstruction algorithm based on Garbor wavelet transformation. The defect region was then enhanced by post-processing of the reconstructed image. Both of the accuracy and the speed for detecting the mura defect are improved. Experiment results verified that the proposed method is useful and efficient for detecting the mura defects of the display panel.
이황주(Hwang-Ju Lee),박태형(Tae-Hyoung Park) 대한전기학회 2017 전기학회논문지 Vol.66 No.4
The curved panel is widely used for display of TVs and smart phones. This paper proposes a new auto-focusing method for curved panel inspection system. Since the distance between the camera and the panel varies with the curve position, the camera should change its focus at every inspection time. In order to reduce the focusing time, we propose an effective focusing method that considers the mathematical model of panel curve. The Lagrange polynomial equation is applied to modeling the panel curve. The foci of initial three points are used to get the curve equation, and the other foci are calculated automatically from the curve equation. The experiment result shows that the proposed method can reduce the focusing time.
B.3 : 통계적 품질관리 : B.3.3 ; 제품안전향상을 위한 안전품질기법에 관한 연구
이종범 ( Jong Beom Lee ),김용대 ( Yong Dae Kim ),이황주 ( Hwang Ju Lee ),김상필 ( Sang Pil Kim ),조규선 ( Kyou-sun Cho ),정정민 ( Jeong Min Jeong ),윤태영 ( Tae Young Yun ) 한국품질경영학회 2011 한국품질경영학회 학술대회 Vol.2011 No.1
For companies to secure product safety in the global industry is a significant issue, business and government policy continued technological development and quality management practices throughout the industry a source of corporate competitiveness in the field of safety and quality of products was based on. However, domestic enterprises and small businesses, such as recall of the product cost is a priority to quality management could be vulnerable to accidents because of ``safety based on the preventive quality management`` requirements are growing with the times required. Therefore, companies improve productivity, reduce costs and prioritize quality management environment, safety, safety and quality management system based on government policy because of the switch becoming important for ensuring product safety and quality of the application of techniques necessary to this study was conducted. In this study, safety and quality of the product in terms of techniques to study the safety and quality and reliability, being discussed, especially the recent global assessment of the safety integrity level of safety and quality of products through the research methodology was evaluated.