公开(公告)号：US20190265017A1

公开(公告)日：2019-08-29

申请号：US16279588

申请日：2019-02-19

Applicant: Apple Inc.

Inventor： Jian GUO ,  John Greer ELIAS ,  Savas GIDER

IPC: G01B7/30 ,  G06F3/01

Abstract: Magnetic sensing technology can be used to detect changes, or disturbances (e.g., changes in magnetic field strength), in magnetic fields and can be used to measure the precise location/positioning of an electronic device in proximity to a magnetic source. In order to avoid interference by earth's static magnetic field, a modulated magnetic field can be used for magnetic based proximity sensing. Received modulated magnetic field signals can be demodulated to determine proximity of the sensor to the source of the modulated magnetic field. Devices such as gloves or devices with fingertip nodes based on receiving modulated magnetic fields can be used to detect user hand position.

公开(公告)号：US20190094811A1

公开(公告)日：2019-03-28

申请号：US15717782

申请日：2017-09-27

Applicant: Apple Inc.

Inventor： Jian GUO

IPC: G04C3/00 ,  G04G17/08

CPC classification number: G04C3/004 ,  G04G17/08

Abstract: An electronic device is disclosed. In some examples, a crown comprising a housing can be operatively coupled to a body of the electronic device, and configured to rotate in a first direction with respect to the body of the electronic device in response to a mechanical input provided by the user. A rotating member can be disposed at least partially inside the crown housing and configured to rotate in the first direction in response to the mechanical input. A first magnetic sensing cell can be attached to the rotating member at a first location of the rotating member and can be electrically connected to an electronic circuit. A magnet can be configured to remain stationary with respect to the body of the electronic device. The electronic circuit can be configured to generate a first signal corresponding to a rotational position of the crown with respect to the body of the electronic device.