| 发明名称 |
MAGNETICALLY BIASED ELECTROMAGNET FOR AUDIO APPLICATIONS |
| 摘要 |
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. |
| 申请公布号 |
US2014185859(A1) |
申请公布日期 |
2014.07.03 |
| 申请号 |
US201213731973 |
申请日期 |
2012.12.31 |
| 申请人 |
APPLE INC. |
发明人 |
Wilk Christopher R.;Johnson Martin E.;Kessler Patrick;Johanningsmeier Nathan A. |
| 分类号 |
H04R9/02 |
主分类号 |
H04R9/02 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An electronic device comprising:
an enclosure having a top panel and a bottom panel; an electromagnet 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 attached to the bottom panel, the attractor plate forming part of a magnetic circuit of the electromagnet such that input of an electrical audio signal to the electromagnet causes the bottom panel to move and produce a sound; and a permanent magnet attached to the core portion, the permanent magnet configured to create a bias in the magnetic circuit so as to modify a distortion in the sound. |
| 地址 |
Cupertino CA US |
