Projection system

Details Projection system Projection system

2006-11-21

2006-11-21

Perkey, W. B. (Department: 2851)

Optics: image projectors

Miscellaneous

C353S015000, C359S444000, C359S449000, C348S771000, C352S012000

Reexamination Certificate

active

07137710

ABSTRACT:
A method for presenting secondary information to a video-viewing audience comprises projecting video images onto a screen and projecting invisible light signals encoded to represent secondary information associated with said video images onto the screen concurrently with said video images.

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