Multiple participant interactive interface

Details Multiple participant interactive interface Multiple participant interactive interface

1996-10-15

1999-10-26

Swarthout, Brent A.

Computer graphics processing and selective visual display system

Display peripheral interface input device

Cursor mark position control device

345157, G09G 508

Patent

active

059736720

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.

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patent: 5589822 (1996-12-01), Stern
patent: 5682181 (1997-10-01), Nguyen et al.

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