Convergence measuring apparatus and method thereof

Details Convergence measuring apparatus and method thereof Convergence measuring apparatus and method thereof

2005-04-12

2005-04-12

Christensen, Andrew (Department: 2612)

Television

Video display

Cathode-ray tube

C348S177000, C348S189000, C348S190000, C348S806000, C359S462000

Reexamination Certificate

active

06879352

ABSTRACT:
A convergence measuring apparatus and a measuring method thereof. The apparatus for measuring a convergence includes: a first camera for obtaining the certain pattern formed on the cathode ray tube; a light path dividing section for processing the certain pattern 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; an estimating section for estimating the position and posture of the certain pattern based on the stereo images obtained through the second camera; and 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. Further, the method for measuring the convergence includes the steps of: forming the certain pattern on the cathode ray tube; calculating the convergence by obtaining the certain pattern formed on the cathode ray tube by the first camera; obtaining the certain pattern formed on the cathode ray tube as a stereo image through the second camera; estimating the position and posture of the cathode ray tube based on the stereo images; and compensating the convergence by including the estimated position and posture of the cathode ray tube in the calculation of the convergence.

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