Magnetic sensor assembly for sensing rotational positions of a camera module
US11650041B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2021 |
| Grant date | May 16, 2023 |
| Priority date | — |
| Expiry date | May 21, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/561
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic sensor assembly for detecting angular positions of a camera module, includes: a housing; a rotation member configured to rotate together with the camera module; a magnet member that is configured to rotate with the rotation member on at least a portion of the housing, the magnet member includes a first multi-pole magnetized magnet that has a first number of pole pairs alternately disposed along a first circumference on the rotation member, and further includes a second multi-pole magnetized magnet that has a second number of pole pairs alternately disposed along a second circumference on the rotation member; a hall sensor configured to detect a change of magnetic field generated from the first multi-pole magnetized magnet and the second multi-pole magnetized magnet; and a processor configured to estimate an initial position of the rotation member and a rotational angle from the initial position using the detected magnetic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.