Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Randall B. Sprague0
Date of Patent
June 7, 2011
0Patent Application Number
121822640
Date Filed
July 30, 2008
0Patent Citations Received
Patent Primary Examiner
Patent 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.
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