Optics: image projectors – Distortion compensation – For projection axis inclined to screen
Reexamination Certificate
2011-04-29
2011-12-13
Dowling, William C (Department: 2878)
Optics: image projectors
Distortion compensation
For projection axis inclined to screen
C348S745000, C348S806000, C345S001300
Reexamination Certificate
active
08075141
ABSTRACT:
In at least one embodiment, a projector comprises a projection unit configured to project a video based on a video signal. An image pickup unit is configured to pick up an image of a projection video projected by the projection unit and output the picked-up image. A control unit is configured to determine a projection video projected by an other projector based on the picked-up image received from the image pickup unit. A keystone correction unit is configured to carry out keystone correction of the video signal so that the projection video projected by the projection unit is aligned with the projection video projected by the other projector.
REFERENCES:
patent: 6733138 (2004-05-01), Raskar
patent: 7237911 (2007-07-01), Yamada
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
Notice of Allowance and Notice of Allowability received in U.S. Appl. No. 12/370,451; Feb. 15, 2011.
AdvantEdge Law Group, LLC
Dowling William C
Seiko Epson Corporation
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