Scanned Beam Overlay Projection
First Claim
Patent Images
1. A method comprising:
- scanning a light beam across an object to display an image;
receiving reflections representing points on the object; and
modifying the image based on locations of the points.
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Abstract
A scanning beam overlay projection system displays an image on a projection surface by scanning a light beam in a raster pattern. Reflective spots on the projection surface reflect light back to the projection system when illuminated by the light beam. A photodetector in the projection system detects the reflected light, and timing circuits determine where in the raster pattern the reflective spots are located. The image can be scaled and warped to correlate tagged points within the image with the locations of the reflective spots on the projection surface.
41 Citations
20 Claims
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1. A method comprising:
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scanning a light beam across an object to display an image; receiving reflections representing points on the object; and modifying the image based on locations of the points. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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projecting an image on a display surface by scanning a light beam in two dimensions; determining when the light beam passes specific points on the display surface; and warping the image based on when the light beam passes the specific points. - View Dependent Claims (10, 11, 12, 13)
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14. An apparatus comprising:
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a scanning light beam projector to display an image by scanning a light beam in two dimensions on a display surface; at least one photodetector to detect light reflected from a plurality of reflective points on the display surface; and an image warping engine to warp the image based on locations of the reflective points within the image. - View Dependent Claims (15, 16, 17)
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18. An apparatus comprising:
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a scanning projector to scan a beam of light in a vertical direction and a horizontal direction across a display surface, the scanning projector sourcing a vertical sync signal and a horizontal sync signal; a detector component to detect when the beam of light passes a specific point on the display surface; a timing circuit responsive to the detector component, the vertical sync signal, and the horizontal sync signal to determine times at which the beam of light passes the specific point on the display surface; and an image warping engine to warp an image displayed by the scanning projector in response to the timing circuit. - View Dependent Claims (19, 20)
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Specification