Radio frequency identification for multi-device wireless chargers
US12169750B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 11, 2021 |
| Grant date | Dec 17, 2024 |
| Priority date | — |
| Expiry date | Nov 30, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/90
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Systems, methods and apparatus for wireless charging are disclosed. A charging device has multiple transmitting coils, a driver circuit configured to provide a charging current to the resonant circuit, and a controller. The charging cells may provide a charging surface. The driver circuit may be configured to provide a charging current to the transmitting coils. The charging device includes a radio interface configured for transmitting and receiving radio frequency identification (RFID) signals. The controller may be configured to transmit an interrogation signal configured to stimulate RFID tags through the radio interface when a chargeable device is initially placed on or near a surface of the wireless charger, refrain from initiating wireless charging of a chargeable device when a response to the interrogation signal is received, and negotiate a charging configuration when a response to the interrogation signal is not received.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.