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:
Jul. 01, 2008
Filed:
Aug. 05, 2002
Applicant:
Michihiro Ohnishi, Kanagawa, JP;
Inventor:
Michihiro Ohnishi, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of preventing image capturing that radiates a visible light that because of the human vision characteristics, an optical image for the visible light for the interference is difficult to distinguish from an image being projected onto the screen and because of the characteristics of an image capturing, an optical image for the visible light for the interference is recorded and distinguishable from the image on the screen, when the image on the screen is illegally reproduced.