Method for performing wireless charging control of an electronic device with aid of random phase-delay packet, and associated apparatus

• US 10,250,067 B2
• Filed: 01/12/2018
• Issued: 04/02/2019
• Est. Priority Date: 01/16/2014
• Status: Active Grant

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Lee, Chi-Min
• Primary Examiner(s): Alam, Mohammed
• Application Number:
  US15/870,682
• Publication Number:
  US 20180138733A1
• Time in Patent Office: 445 Days
• Field of Search: 320108
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge

Abstract

A method for performing wireless charging control of an electronic device and an associated apparatus are provided, where the method includes: determining at least one random value for controlling timing of packet transmission regarding at least one wireless charging report of the electronic device; and based on the aforementioned at least one random value, sending at least one random phase-delay packet, wherein each random phase-delay packet of the aforementioned at least one random phase-delay packet has a random phase-delay with respect to a time slot, and the aforementioned at least one random phase-delay packet is utilized for carrying information of the aforementioned at least one wireless charging report. More particularly, a wireless charging device (e.g. transmitter pad) is arranged to wirelessly charge the electronic device, and based on the aforementioned at least one random value, the electronic device does not obtain information from the wireless charging device through any packet.

Claims

1. An apparatus for wirelessly charging a plurality of electronic devices, the apparatus comprising:

a power output transmitter for wirelessly transferring wireless power to the plurality of electronic devices; and

circuitry configured to;

receive wireless charging reports from respective electronic devices of the plurality of electronic devices, the wireless charging reports comprising charging status information based on wireless power received by the respective electronic devices; and

in response to receiving at least one of the wireless charging reports, triggering associated wireless charging control operation,

wherein when the circuitry detects that data collision exists between two or more of the wireless charging reports in a packet detection window, the circuitry is configured to shorten a duration of the packet detection window and receive a next wireless charging report by detecting the next wireless charging report in a subsequent packet detection window.

2. The apparatus of claim 1, wherein the associated wireless charging control operation comprises a variation in the transferred wireless power.

3. The apparatus of claim 1, wherein the power output transmitter comprises a power output coil.

4. The apparatus of claim 1, wherein a length of the packet detection window is equivalent to a predetermined value.

5. A method for wirelessly charging a plurality of electronic devices, the method comprising:

wirelessly transferring wireless power to the plurality of electronic devices with a power output transmitter;

receiving wireless charging reports from respective electronic devices of the plurality of electronic devices, the wireless charging reports comprising charging status information based on the wireless power received by the respective electronic devices; and

in response to receiving at least one of the wireless charging reports, triggering an associated wireless charging control operation; and

when it is detected that data collision exists between two or more of the wireless charging reports in a packet detection window, shortening a duration of the packet detection window and receiving a next wireless charging report by detecting the next wireless charging report in a subsequent packet detection window.

6. The method of claim 5, wherein triggering the associated wireless charging control operation comprises causing a variation in the transferred wireless power.

7. The method of claim 5, wherein a length of the packet detection window is equivalent to a predetermined value.