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. 01, 2015
Filed:
Dec. 03, 2013
Applicant:
Panasonic Corporation, Kadoma-shi, Osaka, JP;
Inventors:
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/14 (2006.01); G02B 27/00 (2006.01); G02B 7/02 (2006.01); G02B 26/00 (2006.01); G02B 27/10 (2006.01); G02B 27/14 (2006.01); G03B 5/04 (2006.01);
U.S. Cl.
CPC ...
G03B 21/145 (2013.01); G02B 7/022 (2013.01); G02B 7/023 (2013.01); G02B 27/0006 (2013.01); G03B 21/142 (2013.01); G02B 26/008 (2013.01); G02B 27/1033 (2013.01); G02B 27/141 (2013.01); G03B 5/04 (2013.01);
Abstract
The shield includes: a first dust-proof wall that is shiftable integrally with the projection lens, and has width aprojecting from the projection lens to an A side; and a second dust-proof wall that is slidable within a range regulated by the regulator, and has length bon the A side. When the second dust-proof wall has length cshiftable to a B side, the projection lens and the second dust-proof wall form a space having length don the A side, and the projection lens and the frame form a space having length eon the A side, a≧d, b≧e−d, and b+d−e≧care satisfied.