Magnetic shielding unit for wireless power transmission in magnetic resonance mode, and wireless power transmission module and electronic device comprising same
US10629366B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2016 |
| Grant date | Apr 21, 2020 |
| Priority date | — |
| Expiry date | Sep 11, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2027/348
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A wireless power transmission module operable in magnetic resonance method including a radiator unit for wireless power transmission, and a magnetic field shielding unit, disposed on a side of the radiator unit, for preventing disturbance of transmission and reception of the radiator due to the conductor and improving radiator characteristics, by providing a magnetic field shielding layer which includes shredded Fe-based alloy fragments and a dielectric filling at least a part of gaps between shredded Fe-based alloy fragments and some adjacent ones of the fragments to reduce eddy currents, to improve flexibility of and reduce eddy currents in the magnetic field shielding unit. When a wireless power signal is transmitted and received in a magnetic resonance method, the influence of a magnetic field on components of s a mobile terminal or a user can be blocked. Interference with the transmission/reception of the power signal due to the conductor can be minimized or prevented. The radiator characteristics and wireless power transmission efficiency can be remarkably improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.