Magnetic sensing for auto focus position detection
US10365121B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2015 |
| Grant date | Jul 30, 2019 |
| Priority date | — |
| Expiry date | Jun 15, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2205/0053
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Some embodiments include a method for measuring the position of a camera lens carrier moveable by an autofocus actuator. In some embodiments, the method includes generating a measurement of a magnetic field resulting at least in part from the one or more position sensor magnets. In some embodiments, the generating the measurement of the magnetic field includes measuring a magnetic field component created at least in part by the one or more position sensor magnets fixedly mounted to the camera lens carrier. In some embodiments, the camera lens carrier is moveably coupled to a substrate by the autofocus actuator to provide motion in a direction orthogonal to the substrate. In some embodiments, the generating the measurement of the magnetic field component includes measuring the magnetic field component at a sensor fixedly mounted to the substrate of the autofocus actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.