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:
Dec. 02, 2008
Filed:
Mar. 06, 2007
Applicants:
Yasufumi Ogawa, Chiba, JP;
Takaaki Iwaki, Tokyo, JP;
Yoshihiro Hagiwara, Kanagawa, JP;
Inventors:
Assignee:
Sony Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/56 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a rear projection display apparatus including a transmission type screen installed on the front face of an apparatus main body, and a video projector disposed inside the apparatus main body and projecting video on the transmission type screen from the rear side thereof, the transmission type screen includes a lens sheet and is configured such that a plurality of pull portions provided along horizontal and longitudinal sides of the lens sheet are pulled upward and downward, and leftward and rightward, respectively, by a pulling device provided to extend along the circumference of the lens sheet.