Optics: image projectors – Distortion compensation
Reexamination Certificate
2007-05-29
2007-05-29
Fuller, Rodney (Department: 2851)
Optics: image projectors
Distortion compensation
C353S121000
Reexamination Certificate
active
11028804
ABSTRACT:
A projection apparatus has a projection system including a spatial optical modulator (SOM), which projects an image according to an input image signal, and a projection lens, two retardation sensors and a ranging section, which measure distances corresponding to plural positions in an image projection plane, a key/indicator section provided with a “One-shot AFK” key, which instructs execution of keystone correction and focusing only once, and a “Continuous AFK” key, which instructs continuous execution thereof, and a control section which performs keystone correction on a light image to be formed by the SOM in such a way that a projected image becomes a rectangle with adequate aspect ratio based on distances acquired, focuses the projection lens at an arbitrary position in an image having undergone keystone correction, and controls number of times keystone correction and focusing are to be executed in response to an instruction from one of the keys.
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Casio Computer Co. Ltd.
Frishauf Holtz Goodman & Chick P.C.
Fuller Rodney
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