Coil unit and electronic instrument
US8541977B2 · kind B2 · utility
28Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2008 |
| Grant date | Sep 24, 2013 |
| Priority date | — |
| Expiry date | Jul 21, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F27/402
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A coil unit includes a planar coil that has a transmission side and a non-transmission side, a magnetic sheet provided over the non-transmission side of the planar coil, and a heat sink/magnetic shield plate stacked on a side of the magnetic sheet opposite to a side that faces the planar coil, the heat sink/magnetic shield plate dissipating heat generated by the planar coil and shielding magnetism by absorbing a magnetic flux that has not been absorbed by the magnetic sheet. The heat sink/magnetic shield plate has a thickness larger than that of the magnetic sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.