Patent · US Active

In-field soft magnetic distortion hardware compensation

US11313935B2 · kind B2 · utility

0Cited by

11References

20Claims

0Family size

Assignee

Apple Inc. · US

Inventors

Gunes Dervisoglu · Mountain View, US
Christopher D. Guichet · San Francisco, US
Adam S. Howell · Oakland, US
Alexander J. Wiens · San Jose, US
Christopher E. Balcells · San Jose, US
Erik L. Wang · Cupertino, US
Jonathan M. Beard · San Jose, US
Tang Yew Tan · San Francisco, US
Theodore Lao · Plainfield, US
Tyler S. Bushnell · Mountain View, US
Hung A. Pham · Oakland, US

Key dates

Filing date	Feb 18, 2020
Grant date	Apr 26, 2022
Priority date	—
Expiry date	Jun 24, 2040

Classification

Technology area (CPC G)Physics
CPC primaryG01R33/0206
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for calibrating a magnetometer of an electronic device can include detecting a change in a magnetism of the electronic device, collecting a first magnetic field data from the magnetometer at sampling frequency of at least 1 hertz, generating an elliptical calibration model based at least partially on the collected first magnetic field data, collecting a second magnetic field data from the magnetometer, and fitting the collected second magnetic field data to a sphere using the elliptical calibration model.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.