Method for adjusting convergence in a projection television receiver
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United States of America Patent
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-
Mar 16, 2004
Grant Date -
Feb 7, 2002
app pub date -
Jun 12, 2001
filing date -
Jan 4, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for adjusting convergence in a projection television receiver, in which a marker contained in a projected image is adjusted by a manipulated variable to illuminate a photosensor arranged adjacent to the projection screen. The method employs two markers which are moved towards the sensor from opposite directions with a varying step size. The sensor supplies an output voltage indicating lighting by the two markers in conjunction with two mutually spaced manipulated variables. A mean value of the two manipulated variables is used as the manipulated variable for the marker.
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