The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 2004
Filed:
Jun. 14, 2003
Applicant:
Inventor:
Arpag Dadourian, Northridge, CA (US);
Assignee:
Imatte, Inc., Chatsworth, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 2/126 ; G03B 2/100 ; H04N 9/74 ;
U.S. Cl.
CPC ...
G03B 2/126 ; G03B 2/100 ; H04N 9/74 ;
Abstract
A white projection screen containing a small number of infrared retro reflective elements, uniformly distributed over the screen's surface, is illuminated by an infrared source and observed by a coaxially located infrared camera. A matte signal is generated utilizing a high signal level from the infrared camera in all unobscured areas on the screen, and a very low signal level in screen areas obscured by a presenter between a projector and the projection screen.