Optics: image projectors – Distortion compensation – For projection axis inclined to screen
Reexamination Certificate
2005-05-26
2008-11-18
Koval, Melissa Jan (Department: 2862)
Optics: image projectors
Distortion compensation
For projection axis inclined to screen
C353S121000, C348S745000, C348S806000
Reexamination Certificate
active
07452084
ABSTRACT:
A projector includes a projection device, a cross line positional information acquiring device for acquiring positional information of a cross line between a projection surface of the projection device and a plane crossing the projection surface, an inclination detecting device for calculating an angle of inclination between a projection optical axis of the projection device and the projection surface based on the positional information acquired by the cross line positional information acquiring device, and an image distortion correcting device for correcting a trapezoidal distortion of an input image supplied to the projection device, based on the angle of inclination calculated by the inclination detecting device.
REFERENCES:
patent: 6520646 (2003-02-01), Rodriguez et al.
patent: 7150536 (2006-12-01), Inoue
patent: 1 395 050 (2004-03-01), None
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patent: 2003-198993 (2003-07-01), None
patent: 2003-289485 (2003-10-01), None
patent: 2005-318355 (2005-11-01), None
Koval Melissa Jan
McGinn IP Law Group PLLC
Nec Viewtechnology Ltd.
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