Lens driving module having hall sensor aligned with second magnet for determining displacement parallel to optical axis
US10197812B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2014 |
| Grant date | Feb 5, 2019 |
| Priority date | — |
| Expiry date | May 6, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/687
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A lens driving module includes a holder, a cover, a carrier, at least one first magnet, a first coil, at least two second magnets, at least one first sensor and at least one second sensor. The holder includes an opening hole. The cover is made of metal material and coupled to the holder. The carrier is movably disposed in the cover and for coupling to a lens. The first magnet is movably disposed in the cover. The first coil is wound around an outer side of the carrier. The second magnets are disposed on one end of the carrier. The first sensor is for detecting a magnetic field of the second magnets. The second sensor is for detecting a magnetic field of the first magnet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.