Keystone correction and lens adjustment for projector
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United States of America Patent
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Apr 23, 2013
Grant Date -
Jun 14, 2012
app pub date -
Feb 17, 2012
filing date -
Jun 16, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A projector displays an image on a projection surface. The projector has a zoom adjusting module and a keystone correcting module. The zoom adjusting module adjusts zoom level of a zoom lens for enlarged projection of image light. The keystone correcting module corrects trapezoidal distortion of the image displayed on the projection surface by means of forming the effective panel image in a revised image formation area, the revised image formation area being part of the image formation area of the panel surface.
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