Patent US5973672A successfully refreshed from Google Patents.
US5973672A
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Multiple participant interactive interface
Assignee: L3 Technologies Inc
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Filing: 1996-10-15
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Granted: 1999-10-26
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Expires: 2016-10-15
Abstract
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.
Inventors
- 👤 Jason Rice
- 👤 Larri A. Rosser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:49
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/033; G06F3/038; G06F3/0386
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
134 words
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.
Claim 2
Dependent Claim
134 words
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.
Claim 3
Dependent Claim
20 words
The multiple participant interactive system of claim 1 wherein said plurality of light pointers provide light outputs of different colors.
Claim 4
Dependent Claim
16 words
The multiple participant interactive system of claim 1 wherein said projection means comprises an LCD projector.
Claim 5
Dependent Claim
17 words
The multiple participant interactive system of claim 1 wherein said video detection means comprises a video camera.
Claim 6
Dependent Claim
19 words
The multiple participant interactive system of claim 4 wherein said processing means includes a video digitizer and a computer.
Claim 7
Dependent Claim
18 words
The multiple participant interactive system of claim 5 wherein said processing means further includes a laser disk player.
Claim 8
Dependent Claim
31 words
The multiple participant interactive system of claim 1 wherein said video detection means further comprises an imaging array and an imaging lens for imaging the projection screen onto the imaging array.
Claim 9
Dependent Claim
18 words
The multiple participant interactive system of claim 1 wherein said video detection means further comprises a video camera.
Claim 10
Dependent Claim
133 words
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.
Claim 11
Dependent Claim
133 words
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.
Claim 12
Dependent Claim
14 words
The interactive system of claim 9 wherein said video detector comprises a video camera.
Claim 13
Dependent Claim
14 words
The interactive system of claim 9 wherein said projection means comprises an LCD projector.
Claim 14
Dependent Claim
14 words
The interactive system of claim 9 wherein said video detector comprises a video camera.
Claim 15
Dependent Claim
17 words
The interactive system of claim 9 wherein said processing means includes a video digitizer and a computer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-10-25 | 2003-04-26 | 2003-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-10-25 | 2007-04-26 | 2007-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-10-25 | 2011-04-26 | 2011-10-26 | $7700.00 | Window Closed / Lapsed |