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:
Feb. 17, 2004
Filed:
Jan. 10, 2003
Takanobu Tsunemiya, Kanagawa, JP;
Koji Oshima, Kanagawa, JP;
Takashi Ichimiya, Kanagawa, JP;
Yasuhiro Harada, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A distance measuring device, or a focus detector, including a plurality of sensors provided in association with a plurality of different areas, and a respective plurality of processing circuits provided in association with the plurality of sensors, to process signals output from the plurality of sensors, where power selectively is supplied only to a sensor(s) and a processing circuit(s) associated with the sensor(s) that correspond to a predetermined area from among the plurality of different areas. The predetermined area may be determined on the basis of the state of a power source (e.g., detected voltage level), the focal length of a shooting optical system, the state of an auxiliary light for irradiating an object, and the like.