Multiple participant interactive interface
First Claim
1. A multiple participant interactive system comprising:
- an imaging surface;
projection means for projecting polarized imaging light onto said imaging surface to produce a visible image on said imaging surface;
a plurality of light pointers for projecting respective non-polarized beams of light onto said imaging surface to produce visible spots on said imaging surface, said spots being non-polarized reflections of said non-polarized beams of light;
a cross-polarizing optical filter for rejecting said polarized imaging light;
video detection means responsive to light passed by the optical filter for detecting only said non-polarized reflections without detecting the visible image projected by said projecting means and providing a video output that represents an image of said spots on said imaging surface; and
processing means responsive to said detection means for providing a video input to said projection means.
3 Assignments
0 Petitions
Accused Products
Abstract
A multiple participant interactive system that includes a projection screen (11), a projector (13) for projecting polarized light onto the imaging surface to produce a visible image on the imaging surface, a plurality of light pointers (15) for projecting respective non-polarized beams of light onto the projection screen to produce visible spots on the projection screen, a video detector (17) for detecting the visible spots on the projection screen and providing a video output that represents the visible spots on the projection screen, a computer (21) for processing the video output of the video detector, and a video source (23) which is controlled by the computer and provides a video input to the projector.
47 Citations
13 Claims
-
1. A multiple participant interactive system comprising:
-
an imaging surface; projection means for projecting polarized imaging light onto said imaging surface to produce a visible image on said imaging surface; a plurality of light pointers for projecting respective non-polarized beams of light onto said imaging surface to produce visible spots on said imaging surface, said spots being non-polarized reflections of said non-polarized beams of light; a cross-polarizing optical filter for rejecting said polarized imaging light; video detection means responsive to light passed by the optical filter for detecting only said non-polarized reflections without detecting the visible image projected by said projecting means and providing a video output that represents an image of said spots on said imaging surface; and processing means responsive to said detection means for providing a video input to said projection means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. An interactive system comprising:
-
an imaging surface; a projector for projecting polarized imaging light onto said imaging surface to produce a visible image on said imaging surface; at least one light pointer for projecting a non-polarized beam of light onto said imaging surface to produce a visible spot on said imaging surface, said spot being a non-polarized reflection of said non-polarized beam of light; a cross-polarizing optical filter for rejecting said polarized imaging light; a video detector responsive to light passed by the optical filter for detecting only said non-polarized reflection without detecting the visible image projected by said projector and providing a video output that represents an image of said spot on said imaging surface; and processing means responsive to said detection means for providing a video input to said projection means. - View Dependent Claims (10, 11, 12, 13)
-
Specification