Wireless charging method and apparatus therefor
US11437849B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 2018 |
| Grant date | Sep 6, 2022 |
| Priority date | — |
| Expiry date | May 24, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/60
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An embodiment of the present invention relates to a wireless charging method in a wireless power transmitter, the method comprising: a step of sensing an object in a charging region; a step of measuring a quality factor value; a step of receiving information including a reference quality factor value; a step of detecting a foreign object by using the measured quality factor value and the reference quality factor value; and a step of transmitting a response signal including ACK or NAK information according to whether or not the foreign object has been detected, wherein the wireless power transmitter transmits information including a first guaranteed power value when the response signal includes ACK information, and transmits information including a second guaranteed power value when the response signal includes NAK information, wherein the first guaranteed power value is greater than the second guaranteed power value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.