Method for the automatic measurement of convergence and for the determination of corrections to be made in trichromatic cathode tube deflectors and machine for the application of this method
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United States of America Patent
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May 15, 1990
Grant Date -
N/A
app pub date -
Feb 11, 1988
filing date -
Feb 13, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
For the automatic determining of the characteristics of the corrections to be made in trichromatic cathode tube deflectors, measurements are made of the coordinates of the midpoints of the bars R and B of a crossed bar test pattern at 'strategic' places. With the deflector in the 'mean' position on the tube, the values obtained are standardized by computation to re-establish virtually the ideal position of the deflector, the convergence errors due to this deflector are computed and the pinpoint or overall corrections to be made to it are deduced therefrom.
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