US5025314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus allowing remote interactive use of a plurality of writing surfaces
Assignee: Xerox Corp
•
Filing: 1990-07-30
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Granted: 1991-06-18
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Expires: 2010-07-30
Abstract
Abstract Remote interactive use of a plurality of writing surfaces, such as special wall mounted whiteboards and the like, is facilitated by an apparatus which includes, for each writing surface, a translucent screen acting as the writing surface itself, a video camera located behind the translucent screen for receiving an image of indications imparted upon the translucent screen, and a video projector for projecting onto the back side of the translucent screen a composite of the images imparted upon each of the translucent screens. Backlighting of a user is employed to allow presentation of the processes of imparting, using and referring to the indicia together with the indicia itself. Proper ambient lighting also provides a limited three dimensional view of the user. Audio portions of interactive work may be captured by a microphone and transmitted to speakers in conjunction with the video portion of the interactive work. An audio/video mixing resource may be employed to combine the images of indicia and audio from various worksites for presentation. Low bandwidth of the present system facilitates compression and use with emerging commercial communications standards (e.g., ISDN).
Inventors
- 👤 John C. Tang
- 👤 Scott L. Minneman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:33
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/042; G06F3/0425; H; H04; H04N; H04N7/00; H04N7/14; H04N7/141; H04N7/142; H04N7/15
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
272 words
An apparatus for remote interactive communication, comprising: first and second writing/display screens, each writing/display screen having a first surface for receiving indicia imparted by a user thereupon and a second surface opposite said first surface for diffusing light incident thereupon; a first video camera positioned to capture substantially only those images imparted on the first surface of the first writing/display screen by imaging the second surface of the first writing/display screen; a second video camera positioned to capture substantially only those images imparted on the first surface of the second writing/display screen by imaging the second surface of the second writing/display screen; a first video projector positioned to project an image onto the second surface of the first writing/display screen; a second video projector positioned to project an image onto the second surface of the second writing/display screen; and means for interconnecting the first and second video cameras and video projectors such that an image of indicia imparted by a user upon the first surface of the first writing/display screen is detected by the first video camera and transmitted to the second video projector which projects the image from the first writing/display screen onto the second surface of the second writing/display screen and an image of indicia imparted by a user upon the first surface of the second writing/display screen is detected by the second video camera and transmitted to the first video projector which projects the image from the second writing/display screen onto the second surface of the first writing/display screen to thereby form an optical composite of the images on the first surfaces of the first and second writing/display screens.
Claim 2
Independent Claim
272 words
An apparatus for remote interactive communication, comprising: first and second writing/display screens, each writing/display screen having a first surface for receiving indicia imparted by a user thereupon and a second surface opposite said first surface for diffusing light incident thereupon; a first video camera positioned to capture substantially only those images imparted on the first surface of the first writing/display screen by imaging the second surface of the first writing/display screen; a second video camera positioned to capture substantially only those images imparted on the first surface of the second writing/display screen by imaging the second surface of the second writing/display screen; a first video projector positioned to project an image onto the second surface of the first writing/display screen; a second video projector positioned to project an image onto the second surface of the second writing/display screen; and means for interconnecting the first and second video cameras and video projectors such that an image of indicia imparted by a user upon the first surface of the first writing/display screen is detected by the first video camera and transmitted to the second video projector which projects the image from the first writing/display screen onto the second surface of the second writing/display screen and an image of indicia imparted by a user upon the first surface of the second writing/display screen is detected by the second video camera and transmitted to the first video projector which projects the image from the second writing/display screen onto the second surface of the first writing/display screen to thereby form an optical composite of the images on the first surfaces of the first and second writing/display screens.
Claim 3
Dependent Claim
41 words
The apparatus of claim 1, further including means for illuminating a user such that a shadow of the user is imparted onto the first surface of either the first or second writing/display screen when the user is proximate either first surface.
Claim 4
Dependent Claim
14 words
The apparatus of claim 1, wherein each said writing/display screen comprises a semitransparent body.
Claim 5
Dependent Claim
63 words
The apparatus of claim 1, further including means for capturing and presenting audio communication associated with each said first and second writing/display screens and interconnection means such that audio communication associated with said first writing/display screen is transmitted for presentation at said second writing/display screen and audio communication associated with said second writing/display screen is transmitted for presentation at said first writing/display screen.
Claim 6
Dependent Claim
43 words
The apparatus of claim 1, wherein said means for interconnecting the first and second video cameras and video projectors comprises mixing means for producing a composite of inputs from the first and second video cameras which may be projected by said video projectors.
Claim 7
Dependent Claim
46 words
The apparatus of claim 1, further including storage means connected to said first and second video cameras for storing the image of indicia imparted by a user and the shadow of the user imparted upon the first surface of both the first and second writing/display screens.
Claim 8
Dependent Claim
37 words
The apparatus of claim 1, further including presentation means connected to said first and second video projectors for presenting a selected image for projection upon the second surface of each of said first and second writing/display screens.
Claim 9
Dependent Claim
17 words
The apparatus of claim 7, wherein said presentation means includes means for presenting animated prerecorded collaborative work.
Claim 10
Independent Claim
342 words
An apparatus for remote interactive communication, comprising: first and second writing/display screens, each writing/display screen comprising a semitransparent body having a first surface for receiving indicia imparted by a user thereupon and a second surface opposite said first surface for diffusing light incident thereupon; a first video camera positioned to capture substantially only those images imparted on the first surface of the first writing/display screen by imaging the second surface of the first writing/display screen; a second video camera positioned to capture substantially only those images imparted on the first surface of the second writing/display screen by imaging the second surface of the second writing/display screen; a first video projector positioned to project an image onto the second surface of the first writing/display screen; a second video projector positioned to project an image onto the second surface of the second writing/display screen; mixing means for producing a composite of inputs from the first and second video cameras which may be projected by said video projectors such that an image of indicia imparted by a user upon the first surface of the first writing/display screen captured by the first video camera and an image of indicia of imparted by a user upon the first surface of the second writing/display screen captured by the second video camera are combined to form the composite which is transmitted to both the first and second video projectors which project the composite onto the second surface of the first and second writing/display screens; means for illuminating a user such that a shadow of the user is imparted onto the first surface of either the first or second writing/display screen when the user is proximate either first surface; storage means connected to said mixing means for storing the composite of indicia imparted by a user and the shadow of the user imparted upon the first surface of both the first and second writing/display screens; and presentation means connected to said mixing means for presenting a selected image to said mixing means for transmission to the first and second projectors.
Claim 11
Independent Claim
342 words
An apparatus for remote interactive communication, comprising: first and second writing/display screens, each writing/display screen comprising a semitransparent body having a first surface for receiving indicia imparted by a user thereupon and a second surface opposite said first surface for diffusing light incident thereupon; a first video camera positioned to capture substantially only those images imparted on the first surface of the first writing/display screen by imaging the second surface of the first writing/display screen; a second video camera positioned to capture substantially only those images imparted on the first surface of the second writing/display screen by imaging the second surface of the second writing/display screen; a first video projector positioned to project an image onto the second surface of the first writing/display screen; a second video projector positioned to project an image onto the second surface of the second writing/display screen; mixing means for producing a composite of inputs from the first and second video cameras which may be projected by said video projectors such that an image of indicia imparted by a user upon the first surface of the first writing/display screen captured by the first video camera and an image of indicia of imparted by a user upon the first surface of the second writing/display screen captured by the second video camera are combined to form the composite which is transmitted to both the first and second video projectors which project the composite onto the second surface of the first and second writing/display screens; means for illuminating a user such that a shadow of the user is imparted onto the first surface of either the first or second writing/display screen when the user is proximate either first surface; storage means connected to said mixing means for storing the composite of indicia imparted by a user and the shadow of the user imparted upon the first surface of both the first and second writing/display screens; and presentation means connected to said mixing means for presenting a selected image to said mixing means for transmission to the first and second projectors.
Claim 12
Dependent Claim
17 words
The apparatus of claim 9, wherein said presentation means includes means for presenting animated prerecorded collaborative work.
Claim 13
Dependent Claim
63 words
The apparatus of claim 9, further including means for capturing and presenting audio communication associated with each said first and second writing/display screens and interconnection means such that audio communication associated with said first writing/display screen is transmitted for presentation at said second writing/display screen and audio communication associated with said second writing/display screen is transmitted for presentation at said first writing/display screen.
Claim 14
Independent Claim
409 words
An apparatus for remote interactive communication, comprising: first and second writing/display screens, each writing/display screen comprising a semitransparent body having a first surface for receiving indicia imparted by a user thereupon and a second surface opposite said first surface for diffusing light incident thereupon; a first video camera positioned to capture substantially only those images imparted on the first surface of the first writing/display screen by imaging the second surface of the first writing/display screen; a second video camera positioned to capture substantially only those images imparted on the first surface of the second writing/display screen by imaging the second surface of the second writing/display screen; a first video projector positioned to project an image onto the second surface of the first writing/display screen; a second video projector positioned to project an image onto the second surface of the second writing/display screen; mixing means for producing a composite of inputs from the first and second video cameras which may be projected by said video projectors such that an image of indicia imparted by a user upon the first surface of the first writing/display screen captured by the first video camera and an image of indicia of imparted by a user upon the first surface of the second writing/display screen captured by the second video camera are combined to form the composite which is transmitted to both the first and second video projectors which project the composite onto the second surface of the first and second writing/display screens; means for illuminating a user such that a shadow of the user is imparted onto the first surface of either the first or second writing/display screen when the user is proximate either first surface; storage means connected to said mixing means for storing the composite of indicia imparted by a user and the shadow of the user imparted upon the first surface of both the first and second writing/display screens; presentation means connected to said mixing means for presenting a selected image to said mixing means for transmission to the first and second projectors; and means for capturing and presenting audio communication associated with each said first and second writing/display screens connected to said mixing means such that audio communication associated with said first writing/display screen is transmitted for presentation at said second writing/display screen is transmitted for presentation at said second writing/display screen and audio communication associated with said second writing/display screen is transmitted for presentation at said first writing/display screen.
Claim 15
Independent Claim
409 words
An apparatus for remote interactive communication, comprising: first and second writing/display screens, each writing/display screen comprising a semitransparent body having a first surface for receiving indicia imparted by a user thereupon and a second surface opposite said first surface for diffusing light incident thereupon; a first video camera positioned to capture substantially only those images imparted on the first surface of the first writing/display screen by imaging the second surface of the first writing/display screen; a second video camera positioned to capture substantially only those images imparted on the first surface of the second writing/display screen by imaging the second surface of the second writing/display screen; a first video projector positioned to project an image onto the second surface of the first writing/display screen; a second video projector positioned to project an image onto the second surface of the second writing/display screen; mixing means for producing a composite of inputs from the first and second video cameras which may be projected by said video projectors such that an image of indicia imparted by a user upon the first surface of the first writing/display screen captured by the first video camera and an image of indicia of imparted by a user upon the first surface of the second writing/display screen captured by the second video camera are combined to form the composite which is transmitted to both the first and second video projectors which project the composite onto the second surface of the first and second writing/display screens; means for illuminating a user such that a shadow of the user is imparted onto the first surface of either the first or second writing/display screen when the user is proximate either first surface; storage means connected to said mixing means for storing the composite of indicia imparted by a user and the shadow of the user imparted upon the first surface of both the first and second writing/display screens; presentation means connected to said mixing means for presenting a selected image to said mixing means for transmission to the first and second projectors; and means for capturing and presenting audio communication associated with each said first and second writing/display screens connected to said mixing means such that audio communication associated with said first writing/display screen is transmitted for presentation at said second writing/display screen is transmitted for presentation at said second writing/display screen and audio communication associated with said second writing/display screen is transmitted for presentation at said first writing/display screen.
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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) | 1994-06-17 | 1994-12-17 | 1995-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-17 | 1998-12-17 | 1999-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-17 | 2002-12-17 | 2003-06-18 | $7700.00 | Window Closed / Lapsed |