Method and apparatus for inducing and or reducing geometric distortions in a display via positive going pulses
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United States of America Patent
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Feb 12, 2013
Grant Date -
Mar 24, 2011
app pub date -
Sep 23, 2009
filing date -
Sep 23, 2009
priority date (Note) -
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Abstract
In certain flat screen TV sets, such as LCD monitors, geometric errors can be induced in a video signal by positive going pulses. That is, a shift in a display is provided when one or more positive going pulse is added to the video signal following one or more sync pulse. To illustrate, AGC pulses, generally used for content control and or copy protection in the last lines of an active video field, cause a shift (horizontal displacement) in the picture for these last lines in the active field. Alternatively, turning off or attenuating such positive going pulses in the last lines of the active field, eliminates or reduces the picture shift.
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