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, 2014
Filed:
Sep. 18, 2013
Applicant:
Funai Electric Co., Ltd., Osaka, JP;
Inventor:
Tomohisa Hirai, Osaka, JP;
Assignee:
Funai Electric Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B 11/14 (2006.01); G06F 3/041 (2006.01); G06F 3/03 (2006.01); G06F 3/042 (2006.01);
U.S. Cl.
CPC ...
G01B 11/14 (2013.01); G06F 3/041 (2013.01); G06F 3/0304 (2013.01); G06F 3/0421 (2013.01); G06F 3/03 (2013.01); G06F 2203/04101 (2013.01);
Abstract
This position detection apparatus includes a plurality of light receiving portions receiving a reflected laser beam from an indicator, a lens, a masking portion arranged between the light receiving portions and the lens, having a masking surface restricting the reflected laser beam guided to the light receiving portions in a direction orthogonal to a projection surface, and a determination portion determining a three-dimensional position in a projection image indicated by the indicator. The masking surface of the masking portion has such a concave shape that opposing ends thereof are closer to the lens than a central portion thereof.