WIRELESS POWER RECEIVER AND METHOD OF CONTROLLING THE SAME
A method of controlling a wireless power receiver can include detecting a wireless power transmitter that transmits wireless power having a first frequency band through in-band communication; receiving the wireless power having the first frequency band from the wireless power transmitter that transmits the wireless power having the first frequency band; in response to determining that a power receiving state of the first frequency band is abnormal, detecting a wireless power transmitter that transmits wireless power having a second frequency band through out-of-band communication; and receiving the wireless power having the second frequency band from the wireless power transmitter that transmits the wireless power having the second frequency band.
1 . A method of controlling a wireless power receiver, the method comprising:
detecting a wireless power transmitter that transmits wireless power having a first frequency band through in-band communication;
receiving the wireless power having the first frequency band from the wireless power transmitter that transmits the wireless power having the first frequency band;
in response to determining that a power receiving state of the first frequency band is abnormal, detecting a wireless power transmitter that transmits wireless power having a second frequency band through out-of-band communication; and
receiving the wireless power having the second frequency band from the wireless power transmitter that transmits the wireless power having the second frequency band.
2 . The method according to claim 1 , wherein the receiving of the wireless power having the first frequency band includes determining the power receiving state of the wireless power receiver through in-band communication.
3 . The method according to claim 1 , wherein the receiving of the wireless power having the second frequency band includes determining the power receiving state of the wireless power receiver through out-of-band communication.
4 . The method according to claim 1 , wherein the first frequency band is lower than the second frequency band.
5 . The method according to claim 4 , wherein the first frequency band is in a range of 110 KHz to 205 KHz.
6 . The method according to claim 5 , wherein the second frequency band is 6.78 MHz.
7 . The method according to claim 1 , further comprising:
terminating wireless power reception of the first frequency band, prior to receiving the wireless power having the second frequency band.
8 . The method according to claim 1 , further comprising:
detecting a wireless power transmitter that transmits wireless power having a third frequency band.
9 . The method according to claim 8 , further comprising:
receiving the wireless power having the third frequency band from the wireless power transmitter having the third frequency band.
10 . The method according to claim 9 , wherein the receiving of the wireless power having the third frequency band includes changing an inductance of a reception coil in the wireless power receiver to match a used frequency band of the wireless power receiver to the third frequency band.
11 . The method according to claim 10 , wherein the changing the inductance of the reception coil includes adjusting a length of the of the reception coil.
12 . The method according to claim 10 , wherein the changing the inductance of the reception coil includes adjusting a variable capacitor in the wireless power receiver.
13 . The method according to claim 8 , wherein the third frequency band is in a range of 206 KHz to 300 KHz.
14 . The method according to claim 1 , wherein the receiving of the wireless power having the first frequency band includes increasing an inductance of a reception coil in the wireless power receiver to match a used frequency band of the wireless power receiver to the first frequency band.
15 . The method according to claim 14 , wherein the increasing the inductance of the reception coil includes increasing a length of the reception coil.
16 . The method according to claim 14 , wherein matching the used frequency band of the wireless power receiver to the first frequency band further includes adjusting a variable capacitor in the wireless power receiver.
17 . The method according to claim 14 , wherein the receiving of the wireless power having the second frequency band includes decreasing the inductance of the reception coil in the wireless power receiver to match a used frequency band of the wireless power receiver to the second frequency band.
18 . The method according to claim 17 , wherein the decreasing the inductance of the reception coil includes decreasing a length of the of the reception coil.
19 . The method according to claim 17 , wherein matching the used frequency band of the wireless power receiver to the second frequency band further includes adjusting a variable capacitor in the wireless power receiver.