Magnetically biased electromagnet for audio applications
US8942410B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2012 |
| Grant date | Jan 27, 2015 |
| Priority date | — |
| Expiry date | Feb 1, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electronic device having an enclosure having a top panel and a bottom panel. An electromagnet is mounted within the enclosure, the electromagnet having a core portion attached to the top panel and a coil connected to the core portion. An attractor plate is attached to the bottom panel, the attractor plate forming part of a magnetic circuit of the electromagnet such that when an electrical audio signal is applied to the electromagnet, the bottom panel vibrates and produces a sound. A permanent magnet is further attached to the core portion, the permanent magnet is configured to create a bias in the magnetic circuit so as to modify a distortion in the sound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.