Journal of Institute of Control, Robotics and Systems (제어로봇시스템학회논문지)

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Kinematics and Control of a Visual Alignment System for Flat Panel Displays

평판 디스플레이 비전 정렬 시스템의 기구학 및 제어

  • 권상주 (한국항공대학교 항공우주기계공학부) ;
  • 박찬식 (삼성전자(주) 디스플레이사업부) ;
  • 이상무 (한국생산기술연구원 로봇기술본부)
  • Published : 2008.04.01
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Abstract

The kinematics and control problem of a visual alignment system is investigated, which plays a crucial role in the fabrication process of flat panel displays. The first solution is the inverse kinematics of a 4PPR parallel alignment mechanism. It determines the driving distance of each joint to compensate the misalignment between mask and panel. Second, an efficient vision algorithm for fast alignment mark recognition is suggested, where by extracting essential feature points to represent the geometry of a mark, the geometric template matching enables much faster object recognition comparing with the general template matching. Finally, the overall visual alignment process including the kinematic solution, vision algorithm, and joint control is implemented and experimental results are given.

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References

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