公开(公告)号：US20230333394A1

公开(公告)日：2023-10-19

申请号：US18180700

申请日：2023-03-08

Applicant: Apple Inc.

Inventor： Yuhao Pan ,  Guangwu Duan ,  Jeffrey A. Griffis ,  John G. Elias ,  Krishna Prasad Vummidi Murali ,  Michael A. Lehr ,  Savas Gider ,  Stephen E. Dey

IPC: G02B27/01 ,  G01R33/02 ,  G06F3/01 ,  G06F3/0354

CPC classification number: G02B27/0176 ,  G02B27/0172 ,  G01R33/0206 ,  G06F3/014 ,  G06F3/03545 ,  G02B2027/0192 ,  G02B2027/0138

Abstract: A head-mounted device or other electronic device may emit an alternating-current magnetic field. A wireless controller may have alternating-current magnetometers for monitoring the alternating-current field. The wireless controller may also have an accelerometer for measuring the orientation of the controller relative to the Earth's gravity and a direct-current magnetometer for measuring the orientation of the controller relative to the Earth's magnetic field. The alternating-current magnetometers may be three-coil magnetometers located at different locations in a controller housing. Using data from the alternating-current magnetometers, the direct-current magnetometer, the accelerometer, and/or other sensors, the wireless controller can determine the position and orientation of the wireless controller. This information can be wirelessly transmitted to the head-mounted device to control the head-mounted device.

公开(公告)号：US11965944B2

公开(公告)日：2024-04-23

申请号：US17410980

申请日：2021-08-24

Applicant: Apple Inc.

Inventor： Guangwu Duan ,  Jian Guo ,  John Greer Elias ,  Savas Gider

IPC: G01R33/36 ,  G01R33/34 ,  G01R33/385

CPC classification number: G01R33/36 ,  G01R33/34 ,  G01R33/385

Abstract: Disclosed is a compact, multi-user magnetic tracking system. In an embodiment, a compactness is achieved by using a single coil and inertial sensors at the transmitter and magnetometers and inertial sensors at the receiver for sensing the magnetic field generated by the single coil and for determining a position and attitude of the receiver relative to the transmitter. The transmitter and receiver each include a wireless transceiver for exchanging clock synchronization data and sending transmitter attitude data to the receiver. In another embodiment, frequency or time division multiplexing is used to differentiate between multiple users of the multi-user magnetic tracking system.

公开(公告)号：US20230095729A1

公开(公告)日：2023-03-30

申请号：US17950801

申请日：2022-09-22

Applicant: Apple Inc.

Inventor： William R. Allan ,  Guangwu Duan ,  Jian Guo ,  Chaitanya Mudivarthi ,  Long T. Pham

IPC: H02J50/90 ,  H02J50/10

Abstract: Circuitry in the electronic device may use a plurality of magnetic sensors to detect an alternating current signal transmitted by the wireless charger and/or to detect a magnetic field generated by one or more magnets in the wireless charger. The circuitry may determine a position of the wireless charger relative to a wireless power transfer coil in the electronic device and provide feedback to guide users in attaching the wireless charger to the correct position on the electronic device, including such as visual indications on a device display.

公开(公告)号：US11549823B2

公开(公告)日：2023-01-10

申请号：US17483122

申请日：2021-09-23

Applicant: Apple Inc.

Inventor： Guangwu Duan ,  Jian Guo ,  John Greer Elias ,  Savas Gider

IPC: G01D5/20 ,  H01F7/20

Abstract: Disclosed is a compact 3-axis coil design for a magnetic tracking system. In an embodiment, compactness is achieved by using a 3-axis coil in the transmitter that includes a scaffold design with a side surface having a curved groove for guiding one or more windings of a z-axis coil, such that the physical geometry is not increased.

公开(公告)号：US20220090942A1

公开(公告)日：2022-03-24

申请号：US17483122

申请日：2021-09-23

Applicant: Apple Inc.

Inventor： Guangwu Duan ,  Jian Guo ,  John Greer Elias ,  Savas Gider

IPC: G01D5/20 ,  H01F7/20

Abstract: Disclosed is a compact 3-axis coil design for a magnetic tracking system. In an embodiment, compactness is achieved by using a 3-axis coil in the transmitter that includes a scaffold design with a side surface having a curved groove for guiding one or more windings of a z-axis coil, such that the physical geometry is not increased.

公开(公告)号：US20220065958A1

公开(公告)日：2022-03-03

申请号：US17410980

申请日：2021-08-24

Applicant: Apple Inc.

Inventor： Guangwu Duan ,  Jian Guo ,  John Greer Elias ,  Savas Gider

IPC: G01R33/36 ,  G01R33/385 ,  G01R33/34

Abstract: Disclosed is a compact, multi-user magnetic tracking system. In an embodiment, a compactness is achieved by using a single coil and inertial sensors at the transmitter and magnetometers and inertial sensors at the receiver for sensing the magnetic field generated by the single coil and for determining a position and attitude of the receiver relative to the transmitter. The transmitter and receiver each include a wireless transceiver for exchanging clock synchronization data and sending transmitter attitude data to the receiver. In another embodiment, frequency or time division multiplexing is used to differentiate between multiple users of the multi-user magnetic tracking system.