Electronic Device Having Electronic Compass With Demagnetizing Coil And Annular Flux Concentrating Yokes
    31.
    发明申请
    Electronic Device Having Electronic Compass With Demagnetizing Coil And Annular Flux Concentrating Yokes 有权
    具有回磁线圈和环形磁通集中磁轭的电子罗盘的电子装置

    公开(公告)号:US20160313122A1

    公开(公告)日:2016-10-27

    申请号:US14838075

    申请日:2015-08-27

    Applicant: Apple Inc.

    CPC classification number: G01C17/02 G01R33/0011 G01R33/093 G01R35/005

    Abstract: An electronic device may be provided with an electronic compass. The electronic compass may include magnetic sensors. The magnetic sensors may include thin-film magnetic sensor elements such as giant magnetoresistance sensor elements. Magnetic flux concentrators may be used to guide magnetic fields through the sensor elements. To reduce offset in the electronic compass, the magnetic flux concentrators may be demagnetized by applying a current to a coil in the housing. The coil may be formed from loops of metal traces within a printed circuit or other loops of conductive paths. Magnetic flux concentrators may have ring shapes. A ring-shaped magnetic flux concentrator may be formed from multiple thin stacked layers of soft magnetic material separated by non-magnetic material.

    Abstract translation: 电子设备可以设置有电子罗盘。 电子罗盘可以包括磁性传感器。 磁传感器可以包括诸如巨磁阻传感器元件的薄膜磁传感器元件。 磁通集中器可用于引导磁场穿过传感器元件。 为了减少电子罗盘中的偏移,可以通过向壳体中的线圈施加电流来使磁通量集中器退磁。 线圈可以由印刷电路中的金属迹线或其它导电路径环形成。 磁通集中器可以具有环形。 可以由由非磁性材料分离的多个软磁材料层叠形成环形磁通集中器。

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