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:
Apr. 18, 2006
Filed:
Mar. 10, 2003
Applicants:
Tomohiro Nishi, Kanagawa, JP;
Michihiro Ohnishi, Kanagawa, JP;
Inventors:
Tomohiro Nishi, Kanagawa, JP;
Michihiro Ohnishi, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/32 (2006.01); H04N 7/167 (2006.01); G02B 26/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical intensity modulation having a periodicity in the temporal domain is applied on an optical state of an original display image, being displayed on a projection screen or a display screen, that takes into account a human temporal frequency contrast sensitivity characteristics, so that an optical state variation that is independent of the original display image would appear in an image recorded by capturing the display image using an image capturing apparatus, while the optical state variation in the display image being directly viewed remains imperceptible.