Inductive powering surface for powering portable devices
US7262700B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 13, 2005 |
| Grant date | Aug 28, 2007 |
| Priority date | — |
| Expiry date | Dec 10, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/90
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An inductive powering device provides power to a portable device via inductive coupling between primary coils in the surface of the powering device and a secondary coil in the portable device. The portable device includes a passive locator device, such as an RFID device, to allow the primary coils of the inductive powering surface to detect the presence and location of the secondary coil, and only primary coils adjacent the secondary coil are energized for power transfer. A cost-effective driving configuration that arranges the primary coils into a matrix with drive circuits switchably connected to the row and columns is used to energize the primary coils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.