Wireless power receiver device, wireless power transmitter device, method of receiving wireless power, and method of transmitting wireless power

1 . A wireless power receiver, which receives a wireless power from a wireless power transmitter,

wherein the wireless power receiver receives the wireless power based on any one of a first power profile, a second power profile with higher power than the first power profile and a third power profile with higher power than the second power profile,

wherein the wireless power transmitter transmits the wireless power based on any one of the first power profile, the second power profile and the third power profile,

wherein the wireless power receiver is configured to perform:

a ping phase for receiving a digital ping from the wireless power transmitter and transmitting a response to the digital ping to the wireless power transmitter,

a configuration phase for transmitting, to the wireless power transmitter, a configuration packet including information for elements of a first power transfer contract,

a negotiation phase or a renegotiation phase for transmitting information for elements of a second power transfer contract, the second power transfer contract being an updated power transfer contract obtained by updating the first power transfer contract, to the wireless power transmitter, and

a power transfer phase for receiving the wireless power from the wireless power transmitter based on the second power transfer contract,

wherein the wireless power receiver is further configured to:

transmit, to the wireless power transmitter, a first data packet including first profile information indicating that the wireless power receiver supports the third power profile,

receive, from the wireless power transmitter, a second data packet including second profile information indicating that the wireless power transmitter supports the third power profile,

wherein the first data packet is the configuration packet,

wherein, in the ping phase, the configuration phase, and the negotiation phase or the renegotiation phase, data packets or messages exchanged between the wireless power transmitter and the wireless power receiver are transmitted and received through in-band communication,

wherein, in the power transfer phase, the wireless power transmitter and the wireless power receiver transmit and receive the wireless power based on the second power transfer contract updated in the negotiation phase or the renegotiation phase, and

wherein, in the negotiation phase or the renegotiation phase, the second power transfer contract is extended or modified from the first power transfer contract, or at least a part of elements of the second power transfer contract is adjusted through an update of the power transfer contract, or information for establishing out-of-band communication is exchanged between the wireless power receiver and the wireless power transmitter.

2 . The wireless power receiver of claim 1 , wherein the first profile information is represented by 1 bit in the configuration packet.

3 . The wireless power receiver of claim 1 , wherein, in the negotiation phase, a capability packet including information for negotiable load power and information for potential load power is received from the wireless power transmitter,

wherein the second data packet is the capability packet.

4 . The wireless power receiver of claim 3 , wherein the second profile information is represented by 1 bit in the capability packet.

5 . The wireless power receiver of claim 1 , wherein, in the negotiation phase, an extended capability packet including slot information for detecting a foreign object is received from the wireless power transmitter,

wherein the second data packet is the extended capability packet.

6 . The wireless power receiver of claim 5 , wherein the second profile information is represented by 1 bit in the extended capability packet.

7 . The wireless power receiver of claim 1 , wherein, based on confirming that the wireless power receiver supports the third power profile based on the first data packet and confirming that the wireless power transmitter supports the third power profile based on the second data packet,

in the power transfer phase, the wireless power receiver communicates with the wireless power transmitter using the out-of-band communication.

8 . A wireless power transmitter, which transmits a wireless power to a wireless power receiver,

wherein the wireless power transmitter transmits the wireless power based on any one of a first power profile, a second power profile with higher power than the first power profile and a third power profile with higher power than the second power profile,

wherein the wireless power receiver receives the wireless power based on any one of the first power profile, the second power profile and the third power profile,

wherein the wireless power transmitter is configured to perform:

a ping phase for transmitting a digital ping to the wireless power receiver and receiving a response to the digital ping from the wireless power receiver,

a configuration phase for receiving a configuration packet including information for elements of a first power transfer contract from the wireless power receiver,

a negotiation phase or a renegotiation phase for receiving information for elements of a second power transfer contract, the second power transfer contract being an updated power transfer contract obtained by updating the first power transfer contract, from the wireless power receiver, and

a power transfer phase for transmitting the wireless power to the wireless power receiver based on the second power transfer contract,

wherein the wireless power transmitter is further configured to:

receive, from the wireless power receiver, a first data packet including first profile information indicating that the wireless power receiver supports the third power profile,

transmit, to the wireless power receiver, a second data packet including second profile information indicating that the wireless power transmitter supports the third power profile,

wherein the first data packet is the configuration packet,

wherein, in the ping phase, the configuration phase, and the negotiation phase or the renegotiation phase, data packets or messages exchanged between the wireless power transmitter and the wireless power receiver are transmitted and received through in-band communication,

wherein, in the power transfer phase, the wireless power transmitter and the wireless power receiver transmit and receive the wireless power based on the second power transfer contract updated in the negotiation phase or the renegotiation phase, and

wherein, in the negotiation phase or the renegotiation phase, the second power transfer contract is extended or modified from the first power transfer contract, or at least a part of elements of the second power transfer contract is adjusted through an update of the power transfer contract, or information for establishing out-of-band communication is exchanged between the wireless power receiver and the wireless power transmitter.

9 . The wireless power transmitter of claim 8 , wherein the first profile information is represented by 1 bit in the configuration packet.

10 . The wireless power transmitter of claim 8 , wherein, in the negotiation phase, a capability packet including information for negotiable load power and information for potential load power is transmitted to the wireless power receiver,

wherein the second data packet is the capability packet.

11 . The wireless power transmitter of claim 10 , wherein the second profile information is represented by 1 bit in the capability packet.

12 . The wireless power transmitter of claim 8 , wherein, in the negotiation phase, an extended capability packet including slot information for detecting a foreign object is transmitted to the wireless power receiver,

wherein the second data packet is the extended capability packet.