Method, system and apparatus to optimize wireless charging and FM reception

Patent metadata

Field	Value
Publication number	US-9966786-B2
Application number	US-201514862585-A
Country	US
Kind code	B2
Filing date	Sep 23, 2015
Priority date	Sep 23, 2015
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

The disclosure generally relates to methods, system and apparatus to optimize wireless charging while allowing FM radio reception. In an exemplary embodiment, presence of an active FM radio on a wireless platform is detected and the active FM channel is identified. To reduce radio frequency interference between the wireless charging magnetic field and the FM channel, the PTU may adaptively shift the A4WP frequency. The disclosed embodiments improve user experience with FM radios in wireless charging systems.

First claim

What is claimed is:

1. A Power Transmission Unit (PTU), comprising:
a charging circuitry to generate magnetic field having a first fundamental frequency;
a communication platform to communicate with an external device, wherein the communication platform is to receive a packet from the external device to start communications with the PTU and the packet comprises a particular field defined to indicate whether the external device is equipped to receive a particular type of radio signal;
a controller to communicate with the communication platform and with the charging circuitry, the controller to receive indication from the communication platform that the external device is equipped to receive particular type of radio signal based on the packet.

2. The PTU of claim 1 , wherein the particular type of radio signal is a Frequency Modulation (FM) signal.

3. The PTU of claim 2 , wherein the controller is further configured to initiate an alarm if the first fundamental frequency interferes with the particular type of radio signal.

4. The PTU of claim 1 , wherein the controller is further configured to receive indication of radio signal frequency and to determine if a frequency harmonic of the first fundamental frequency interferes with the particular type of radio signal.

5. The PTU of claim 4 , wherein the controller is further configured to shift the first fundamental frequency to a second frequency to substantially reduce interference with the particular type of radio signal.

6. The PTU of claim 1 , wherein the controller further comprising a processor circuitry and a memory circuitry, the memory circuitry communicating instructions to the processor circuitry to determine if the magnetic field of the first frequency interferes with the particular type of radio signal.

7. The PTU of claim 1 , wherein the communication platform is one of Bluetooth Low Energy (BLE) or Near-Field Communication (NFC) platform.

8. The PTU of claim 1 , wherein the packet comprises a plurality of fields including the particular field, and each of the plurality of fields is to include data to indicate to the PTU whether the external device supports a corresponding one of a plurality of capabilities.

9. The PTU of claim 1 , wherein the particular field comprises a single bit.

10. The PTU of claim 1 , wherein the packet is defined according to an Alliance for Wireless Power (A4WP) standard.

11. The PTU of claim 1 , wherein the packet is received from the external device over a wireless communication.

12. The PTU of claim 1 , wherein the wireless communication comprises a Bluetooth Low Energy (BLE) communication.

13. The PTU of claim 1 , wherein the wireless communication comprises a Near-Field Communication (NFC) communication.

Assignees

• Intel Corp

Inventors

• Gao Jie
• Yang Songnan
• Lin Xintian E

Classifications

• H02J50/80

  involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices · CPC title

• H04W4/80

  Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication · CPC title

• H04H20/00

  Arrangements for broadcast or for distribution combined with broadcast · CPC title

• H04L27/16

  Frequency regulation arrangements · CPC title

• H02J7/42

  with electronic devices having internal batteries, e.g. mobile phones · CPC title