Patent ID: 11949249
Assignee: MEDIATEK SINGAPORE PTE. LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A method of operating a wireless power receiver, comprising:
sending a request to a wireless power transmitter to perform recalibration for a first type of foreign object detection (FOD) while attempting to change an electromagnetic parameter supplied by the wireless power transmitter;
receiving a FOD result of a second type of FOD from the wireless power transmitter;
continuing with wireless power transfer and performing recalibration of the first type of FOD conditioned on the FOD result indicating that a foreign object is not present or likely not present; and
when the FOD result indicates the foreign object is present or likely present, changing one or more wireless power transfer parameters, limiting wireless power transfer, or discontinuing wireless power transfer;
wherein the wireless power receiver sends the request in an attempt to change from a low power mode of wireless power transfer to a high power mode of wireless power transfer, or from a high power mode of wireless power transfer to a low power mode of wireless power transfer,
wherein the first type of FOD measures a first electrical parameter of an electromagnetic coupling between the wireless power transmitter and the wireless power receiver, the second type of FOD measures a second electrical parameter of the electromagnetic coupling between the wireless power transmitter and the wireless power receiver, and the first electrical parameter is different from the second electrical parameter.