대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

프리필터를 이용한 TFT-LCD 패널의 자동 결함 검출

Automatic Defect inspection of TFT-LCD Panels Using a Pre-Filter

  • 남승욱 (단국대학교 전기공학과) ;
  • 서성대 (단국대학교 전기공학과) ;
  • 남현도 (단국대학교 전기공학과) ;
  • 안동준 (아주자동차대학 자동차계열)
  • Nam, Seung-Uk (Dept. of Electrical Engineering Dankook University) ;
  • Seo, Sung-Dea (Dept. of Electrical Engineering Dankook University) ;
  • Nam, Hyun-Do (Dept. of Electrical Engineering Dankook University) ;
  • Ahn, Dong-Jun (Div. of Automobile, Ajou Motor College)
  • 발행 : 2007.07.18
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초록

In this paper, we proposed pre-filter algorithms which using frequency domain analysis method, for the detections of defects in large-sized Thin Film Transistor-Liquid Crystal Display(TFT-LCD) panel surfaces. We performed frequency analysis with 1-D, 2-D FFT methods for extract periodic patterns of lattice structures in TFT-LCDs. To remove this patterns, band-stop filters were used for eliminating specific frequency components. In order to acquire only defected images, we used 2-D inverse FFT methods which can be reverts images that remains defects.

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