A study on improvement of convergent measurement performance of color display tube using photo sensors

포토 센서를 이용한 브라운관의 컨버젼스 측정 성능 향상에 관한 연구

  • 송원경 (한국과학기술원 전기 및 전자공학과) ;
  • 박종철 (삼성전관주식회사 생산기술센타) ;
  • Published : 1998.03.01

Abstract

In Integrated Tube Components(ITC) process in themanufacturing of color display tube, we describe the necessity of the convergence measurement method using photo sensors. Compared with methods using 1D or 2D cameras, its characteristics is to use of moving image patterns and fixed sensors. This measurement method is formulated as the measurement problem of the phase difference in phase changing periodic signals. The convergence measurement system using photo sensors, for the good performance, must have a small standard deviation for the repetitive measurement in the same condition and a fast measurement time for thecovergence change. By above two conditions, we proposed the real time measurement algorithm of the pahse difference using fundametal and harmonic in phase changing periodic signals. And, the proposed algorithm is applied to the convergence measurement system.

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