Low power- and medium power-compatible wireless charging receiving device and method

Patent metadata

Field	Value
Publication number	US-11817717-B2
Application number	US-202017593261-A
Country	US
Kind code	B2
Filing date	Mar 16, 2020
Priority date	Mar 14, 2019
Publication date	Nov 14, 2023
Grant date	Nov 14, 2023

Abstract

The present specification relates to a wireless power receiving device, receiving method, and receiving system, the device comprising individual rectifiers for each receiving coil, wherein the individual rectifiers comprise isolators for isolating a receiving coil for PC0 from a receiving coil for PC1.

First claim

What is claimed is:

1. A wireless power receiver comprising:
a plurality of power pick-ups configured to receive wireless power from a wireless power transmitter; and
a communicator/controller configured to control the wireless power,
wherein the wireless power receiver supports an in-band communication and an out-band communication,
wherein the wireless power receiver:
performs a ping phase,
performs a configuration phase after the ping phase, and
identifies whether a first power class is used for receiving the wireless power or a second power class is used for receiving the wireless power,
wherein, based on the wireless power receiver identifying that the first power class is used,
the wireless power receiver performs a first negotiation phase or a first power transfer phase based on a protocol of the in-band communication, and
wherein, based on the wireless power receiver identifying that the second power class is used,
the wireless power receiver handovers from the in-band communication to the out-band communication and performs a second negotiation phase or a second power transfer phase based on a protocol of the out-band communication, and
wherein the plurality of power pick-ups comprises a first power pick-up configured to receive the wireless power based on the first power class and a second power pick-up configured to receive the wireless power based on the second power class.

2. The wireless power receiver of claim 1 , wherein the first power class is a power class 0, and
wherein the second power class is a power class 1.

3. The wireless power receiver of claim 2 , wherein a first power is supported in the first power class,
wherein a second power is supported in the second power class, and
wherein the second power is higher than the first power.

4. The wireless power receiver of claim 1 , wherein, based on determining that the wireless power receiver receives the wireless power based on the second power class, the wireless power receiver performs a handover from the in-band communication to the out-band communication.

5. The wireless power receiver of claim 1 , wherein the out-band communication is a BLUETOOTH low energy (BLE) communication or a near field communication (NFC) communication.

6. A method for receiving wireless power from a wireless power transmitter, the method performed by a wireless power receiver, which supports an in-band communication and an out-band communication and comprises a plurality of power pick-ups, and comprising:
performing a ping phase;
performing a configuration phase after the ping phase; and
identifying whether a first power class is used for receiving the wireless power or a second power class is used for receiving the wireless power,
wherein, based on the wireless power receiver identifying that the first power class is used,
the wireless power receiver performs a first negotiation phase or a first power transfer phase based on a protocol of the in-band communication, and
wherein, based on the wireless power receiver identifying that the second power class is used,
the wireless power receiver handovers from the in-band communication to the out-band communication and performs a second negotiation phase or a second power transfer phase based on a protocol of the out-band communication, and
wherein the plurality of power pick-ups comprises a first power pick-up configured to receive the wireless power based on the first power class and a second power pick-up configured to receive the wireless power based on the second power class.

Assignees

• Lg Electronics Inc

Inventors

• Choi Hyengcheul
• Kwak Bongsik
• Kwak Hyunggeol
• Kim Sungkyu
• Kim Jonggu
• Kim Jinhong
• Park Sooyong
• Park Yongcheol
• Park Joonho
• Lee Seonghun

Classifications

• H04B5/45

  Transponders · CPC title

• H04B5/26 Primary

  using coils · CPC title

• H02J50/12 Primary

  of the resonant type · CPC title

• H02J50/10

  using inductive coupling · CPC title

• H02J50/40

  using two or more transmitting or receiving devices (H02J50/50 takes precedence) · CPC title