Electronic devices with magnetic sensors
US9664747B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2013 |
| Grant date | May 30, 2017 |
| Priority date | — |
| Expiry date | Feb 16, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/0206
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Electronic devices may be provided with magnetic sensors for detecting the Earth's magnetic field. The magnetic sensors may include thin magnetic sensors located in magnetically quiet regions of the device. The magnetic sensors may be attached to a device housing or a component such as a battery or a cover structure for a battery. The device may include unidirectional magnetic sensors aligned in three orthogonal directions or sensors with two or three magnetic sensor elements aligned in orthogonal directions. Magnetic field data from the three orthogonally aligned sensors or sensor elements may be combined to form directional compass data for the device. Each magnetic sensor may include one or more magnetic sensor elements for detecting the magnetic field and one or more shielded reference sensor elements for detecting environmental changes that can affect the magnetic sensor element. Reference sensor elements may be shared elements for multiple magnetic sensors elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.