Method and displaying projected image and projection-type image display apparatus
First Claim
Patent Images
1. A projection type image display apparatus, comprising:
- an image projection device which projects an image on a projection plane;
an image pickup device which picks up images of the plane and the image projected on the plane; and
control means for detecting a deviation of the image projected on the plane relative to a predetermined area of the plane by using an output of said image pickup device and correcting the deviation.
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Abstract
A projection-type image display apparatus includes a projected-image generating device arranged to display a projected image by projecting image light onto a projection plane, a detector for detecting a positional deviation of the projected image from a predetermined position on the projection plane, and a corrector for correcting the positional deviation of the projected image according to a result of detection by the detector.
52 Citations
26 Claims
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1. A projection type image display apparatus, comprising:
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an image projection device which projects an image on a projection plane; an image pickup device which picks up images of the plane and the image projected on the plane; and control means for detecting a deviation of the image projected on the plane relative to a predetermined area of the plane by using an output of said image pickup device and correcting the deviation. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 20, 21, 24)
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2. A projection type image display apparatus, comprising:
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an image projection device which projects an image on a projection plane, said projection device having an optical system able to change a geometrical state of the projected image; an image pickup device which picks up images of the plane and the image projected on the plane; and control means for detecting a deviation of the image projected on the plane relative to a predetermined area of the plane by an output of said image pickup device and for controlling the optical system of said projection device so as to correct the deviation.
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3. A projection type image display apparatus, comprising:
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an image projection device which projects an image on a projection plane; an image pickup device which picks up images of the plane and the image projected on the plane; and control means for detecting a deviation of the image projected on the plane relative to a predetermined area of the plane by using an output of the image pickup device and for controlling said projection device so as to correct the deviation.
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18. A projection type image display apparatus, comprising:
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a screen on which a marker is formed; an image projection device which projects an image on said screen; an image pickup device which picks up images of said screen and the image projected on said screen; and control means for detecting a deviation of the projected image relative to a predetermined area of said screen by determining a positional relation between a marker of said screen and a marker of the projected image by using an output of said image pickup device, and for controlling said projection device so as to correct the deviation. - View Dependent Claims (22, 23, 25, 26)
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19. A projection type image display apparatus, comprising:
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a screen having a function to input coordinates; an image projection device which projects an image on said screen; an image pickup device which picks up images of said screen and the image projected on said screen; and control means for detecting a deviation of the projected image relative to a predetermined area of said screen in response to the input of the coordinates and for controlling said projection device so as to correct the deviation.
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Specification