Invention Grant
- Patent Title: Position detection device, drive device, and lens barrel
- Patent Title (中): 位置检测装置，驱动装置和镜筒
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Application No.: US14158086Application Date: 2014-01-17
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Publication No.: US09541369B2Publication Date: 2017-01-10
- Inventor: Tatsuhiro Enomoto , Makoto Umeda , Kenichi Miyamori
- Applicant: Panasonic Corporation
- Applicant Address: JP Osaka
- Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee Address: JP Osaka
- Agency: Renner, Otto, Boisselle & Sklar, LLP
- Priority: JP2011-195812 20110908
- Main IPC: G01B7/04
- IPC: G01B7/04 ; G02B7/09 ; G02B27/64 ; G01B7/00 ; G03B5/02 ; G01D5/14 ; G01D11/30 ; H04N5/232 ; G01B7/14
Abstract:
A position detection device includes a detection portion and a magnetism generation portion. The detection portion includes a first magnetism detection element and a second magnetism detection element. The first magnetism detection element and the second magnetism detection element are disposed on a plane. The magnetism generation portion is disposed at a position opposite the detection portion. The magnetism generation portion includes mutually opposing magnetic fluxes with respect to the detection portion by performing bipolar magnetization on a face opposite the plane where the first magnetism detection element and the second magnetism detection element are disposed.
Public/Granted literature
- US20140132251A1 POSITION DETECTION DEVICE, DRIVE DEVICE, AND LENS BARREL Public/Granted day:2014-05-15
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