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Development of a Thin Glass Vibration Measuring System for Productivity Improvement of LCD Manufacturing Line

LCD 생산라인의 생산성 향상을 위한 초박형 유리진동 계측 시스템의 개발

  • 오영교 ((주)LG 디스플레이) ;
  • 이정욱 (충남대학교 메카트로닉스공학과) ;
  • 선주영 (충남대학교 메카트로닉스공학과) ;
  • 곽정석 ((주)수퍼센츄리) ;
  • 원문철 (충남대학교 메카트로닉스공학과) ;
  • 이현엽 (충남대학교 선박해양공학과)
  • Received : 2011.08.31
  • Accepted : 2011.09.14
  • Published : 2011.09.30

Abstract

Recently, the LCD manufacturing industries try to maximize the productivity of LCD panels due to sharp increase in the market need of LCD display. Usually, the increase in manufacturing speed induces additional vibration of glasses and manufacturing machineries. This kind of vibration can induce bad effects on the manufacturing accuracy, and even can damage the glasses. The vibration signal of glass itself is very useful to predict the allowable maximum level of manufacturing speed. Therefore, it is necessary to measure the vibration of the glass itself and a very thin vibration measurement system attachable on the glass is needed. Since in some processes the glasses need to go through very thin gaps such as 2.5mm, We develop a glass vibration measurement system with the thickness of 1.3mm. The system measures the glass vibration using MEMS type accelerometers and store vibration data in a Nand-Flash memory. The performance of the develop system has been verified on a real LCD manufacturing line and the accuracy of vibration measurement is comparable with that of an accurate commercial vibration measurement system.

Keywords

References

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