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Convergence measuring apparatus and method thereof

  • US 6,879,352 B1
  • Filed: 11/17/2000
  • Issued: 04/12/2005
  • Est. Priority Date: 12/09/1999
  • Status: Expired due to Fees
First Claim
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1. An apparatus for measuring a convergence based on certain patterns formed on a cathode ray tube, comprising:

  • a pattern generator for generating certain patterns comprising a red and blue mixture, and green and blue mixture, respectively, on the cathode ray tube, a first camera for sequentially obtaining the certain patterns formed on the cathode ray tube;

    light path dividing means for processing the certain patterns formed on the cathode ray tube into separate left and right stereo images;

    a second camera for obtaining the stereo images processed by the light path dividing means;

    means for estimating the position and posture of the certain patterns based on the stereo images obtained through the second camera;

    a controlling section for measuring the convergence of the image obtained by the first camera while compensating the convergence based on the estimated position and posture of the cathode ray tube.

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