Voice coil motor
US8558418B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 29, 2010 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | Oct 22, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/025
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A voice coil motor (VCM) includes a lens carrier physically connected to a magnetic device, an electromagnetic driving apparatus, constructed by a coil, a magnetic sensing element, a storage media and a controller. The magnetic sensing element detects a location of the lens carrier and outputs the location value relating to the location of the lens carrier via an amplifier. The storage media stores a gain value and an offset compensation value relating to the amplifier. The controller can make the lens carrier move between a top position and a bottom position in which the lens carrier can be moved within the voice coil motor. The lens carrier is moved using the coil interaction with a magnetic field of the magnetic device when current is applied to the coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.