Dynamic power adjustment mechanism for mitigating wireless power interference
First Claim
1. A mobile device comprising:
- a coil that receives an AC electromagnetic field at a resonance frequency and converts the AC electromagnetic field into an AC electromagnetic current that powers the mobile device and/or charges a battery of the mobile device;
a master control device (MCD) that controls operations in the mobile device;
a power receiver unit (PRU) electrically coupled to the coil and in communication with the MCD, wherein the PRU comprises;
a resonant receiver circuit that selectively de-tunes to receive less power from a power transmitter unit that generates the AC electromagnetic field; and
a master control unit (MCU) electrically coupled to the resonant receiver circuit, wherein the MCU;
receives instructions from the MCD to de-tune the resonant receiver circuit; and
changes the resonant receiver circuit by selectively activating parallel capacitors in the resonant receiver circuit to de-tune from the resonance frequency.
3 Assignments
0 Petitions
Accused Products
Abstract
Wireless charging, such as that conducted according to standards formed by the AirFuel Alliance and/or various other industry standards for wireless charging, can cause interference with data transfer on a cellular modem of a mobile device. Systems, devices, and methods herein provide power breaks where a power transmitter unit (PTU) will stop generating an electromagnetic field used to charge a power receiver unit (PRU). During the power break, the mobile device can send or receive data over the cellular modem with less or no interference from the wireless charging operations. If the PTU cannot provide a power break, the PRU de-tunes a receive resonator circuit in the PRU to mitigate the interference from the wireless charging operations. Further, the power breaks can also be used by PTUs to scan for near field communication (NFC) tags or devices that could be damaged by wireless charging activities.
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Citations
20 Claims
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1. A mobile device comprising:
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a coil that receives an AC electromagnetic field at a resonance frequency and converts the AC electromagnetic field into an AC electromagnetic current that powers the mobile device and/or charges a battery of the mobile device; a master control device (MCD) that controls operations in the mobile device; a power receiver unit (PRU) electrically coupled to the coil and in communication with the MCD, wherein the PRU comprises; a resonant receiver circuit that selectively de-tunes to receive less power from a power transmitter unit that generates the AC electromagnetic field; and a master control unit (MCU) electrically coupled to the resonant receiver circuit, wherein the MCU; receives instructions from the MCD to de-tune the resonant receiver circuit; and changes the resonant receiver circuit by selectively activating parallel capacitors in the resonant receiver circuit to de-tune from the resonance frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for managing power breaks, the method comprising:
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a controller of a power transmitter unit (PTU) sending a notification of an upcoming power break to a power receiver unit (PRU) of a mobile device; after sending the notification, the controller of the PTU transitioning to a power break where the PTU lowers a voltage of or eliminates an AC electromagnetic field that charges the PRU by selectively activating parallel capacitors in a resonant receiver circuit, wherein the mobile device sends or receives data through a cellular modem of the device during the power break; after transitioning to the power break, the controller of the PTU transitioning back to a normal power mode where the PTU reestablishes a normal AC electromagnetic field that provides a charge in the PRU. - View Dependent Claims (9, 10, 11, 12)
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13. A method for managing power breaks, the method comprising:
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a controller of a power receiver unit (PRU) of a mobile device receiving a notification, of an upcoming power break, sent from a power transmitter unit (PTU); after receiving the notification, the controller of the PRU transitioning to a power break where the PTU lowers a voltage of or eliminates an AC electromagnetic field that charges the PRU by selectively activating parallel capacitors in a resonant receiver circuit, wherein the mobile devices sends or receives data through a cellular modem of the mobile device during the power break; after transitioning to the power break, the controller of the PRU transitioning back to a normal power mode where the PTU reestablishes a normal AC electromagnetic field that provides a charge in the PRU. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification