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:
Oct. 15, 2002
Filed:
Sep. 20, 2000
Hideo Yoshida, Saitama, JP;
Kazuaki Nagata, Saitama, JP;
Fuji Photo Optical Co., Ltd., Saitama, JP;
Abstract
Detection electrodes formed from a thin metal plate are attached to rear faces of a lens barrier, a lens barrel and a decorative sheet. The detection electrodes are respectively connected to phase-difference detection circuits used for the lens barrier and the lens barrel. High-frequency pulse signals of a detection side and a reference side are inputted into the phase-difference detection circuits. When a finger touches the lens barrier or the lens barrel, a phase of the detection-side pulse signal is delayed relative to a phase of the reference-side pulse signal by influence of capacitance applied to the detection electrodes. The phase-difference detection circuit detects the overlap of a finger from the delay of the detection-side pulse signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile