Optics: image projectors – Distortion compensation – For projection axis inclined to screen
Reexamination Certificate
2011-06-07
2011-06-07
Dowling, William C (Department: 2878)
Optics: image projectors
Distortion compensation
For projection axis inclined to screen
C353S094000
Reexamination Certificate
active
07954957
ABSTRACT:
A image pickup unit picks up an image of a video projected by a projection unit and outputs the picked-up image. A control unit determines whether the picked-up image includes a projection video other than the video projected by the projection unit or not. If the control unit determines that the picked-up image includes a projection video other than the video projected by the projection unit, the control unit instructs a keystone correction unit to carry out keystone correction of the video signal in accordance with the picked-up image. The keystone correction unit carries out keystone correction of the input video signal or the output video signal so that an edge of the video projected by the projection unit contacts an edge of the projection video other than the video projected by the projection unit.
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patent: 7367681 (2008-05-01), Harboe
patent: 2009/0002637 (2009-01-01), Harada
patent: 8-168039 (1996-06-01), None
patent: 2000-241879 (2000-09-01), None
patent: 2006-251604 (2006-01-01), None
AdvantEdge Law Group, LLC
Dowling William C
Seiko Epson Corporation
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