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. 14, 2015
Filed:
Sep. 10, 2013
Applicant:
Panasonic Corporation, Osaka, JP;
Inventor:
Dai Shintani, Osaka, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N 5/232 (2006.01); G03B 13/04 (2006.01); G03B 13/12 (2006.01);
U.S. Cl.
CPC ...
H04N 5/23293 (2013.01); G03B 13/04 (2013.01); G03B 13/12 (2013.01);
Abstract
An optical viewfinder is configured to be attached to a camera body with an interchangeable lens. The optical viewfinder includes: a Keplerian viewfinder optical systemincluding a scalable objective lens group; a stepping motorconfigured to drive the objective lens groupalong an optical axis; and a control circuit configured to control driving of the stepping motorbased on a result of detection by a PI. When a variable focal length lens (an interchangeable lens) is attached to a camera body, the control circuit controls driving of the stepping motorin accordance with a focal length of the variable focal length lens and displays at least a photographing frame on an EVF panel