Method and apparatus for data communication in wireless power transmission
First Claim
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1. A wireless power transmitter comprising:
- a resonance antenna configured towirelessly transmit a power to a wireless power receiver, andreceive a signal from the wireless power receiver, the signal comprising a sub-carrier; and
a controller configured toreceive the signal from the resonance antenna,receive data from the wireless power receiver based on the sub-carrier,wherein the controller is further configured to;
increase or reduce a number of sub-carriers allocated to the wireless power receiver based on an environment of the wireless power transmitter and the wireless power receiver; and
adjust allocation of the sub-carrier to the wireless power receiver based on the number of the sub-carriers.
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Abstract
A method and apparatus for data communication in wireless power transmission are provided. A wireless power transmitter includes a resonance antenna configured to wirelessly transmit a power to a wireless power receiver, and receive a signal from the wireless power receiver, the signal including a sub-carrier. The wireless power transmitter further includes a controller configured to receive the signal from the resonance antenna, and receive data from the wireless power receiver based on the sub-carrier.
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Citations
19 Claims
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1. A wireless power transmitter comprising:
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a resonance antenna configured to wirelessly transmit a power to a wireless power receiver, and receive a signal from the wireless power receiver, the signal comprising a sub-carrier; and a controller configured to receive the signal from the resonance antenna, receive data from the wireless power receiver based on the sub-carrier, wherein the controller is further configured to; increase or reduce a number of sub-carriers allocated to the wireless power receiver based on an environment of the wireless power transmitter and the wireless power receiver; and adjust allocation of the sub-carrier to the wireless power receiver based on the number of the sub-carriers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A wireless power receiver comprising:
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a resonance antenna configured to wirelessly receive a power and data (power/data) signal from a wireless power transmitter; a controller configured to generate a communication signal comprising data to be transmitted to the wireless power transmitter; and a load modulator configured to receive the communication signal from the controller, and modulate a load of the wireless power receiver to generate an output signal based on the communication signal, the output signal comprising a sub-carrier allocated to the wireless power receiver, wherein the resonance antenna is further configured to receive the output signal from the load modulator, and transmit the output signal to the wireless power transmitter using the sub-carrier, wherein the wireless power receiver further comprises a detector configured to receive the power/data signal from the resonance antenna and remove a main carrier from the power/data signal to demodulate the power/data signal, and a band-pass filter unit configured to extract another sub-carrier allocated to the wireless power receiver from the demodulated power/data signal; and
the controller is further configured todetect an envelope of the other sub-carrier, the envelope comprising logical values ‘
1’ and
‘
0’
, andrecognize data from the wireless power transmitter based on the logical values ‘
1’ and
‘
0’
. - View Dependent Claims (13, 14)
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15. A data communication method comprising:
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detecting a wireless power receiver; allocating, to the wireless power receiver, a frequency channel among frequency channels; transmitting a power to the wireless power receiver; and performing data communication with the wireless power receiver using the frequency channel; determining whether the wireless power receiver is completely charged based on the data communication; recovering the frequency channel in response to the wireless power receiver being completely charged; and interrupting the transmitting of the power to the wireless power receiver in response to the wireless power receiver being completely charged. - View Dependent Claims (16, 17, 18)
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19. A data transmission method comprising:
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receive a power and data (power/data) signal from a wireless power transmitter; removing a main carrier from the power/data signal to demodulate the power/data signal; extracting another sub-carrier allocated to the wireless power receiver from the demodulated power/data signal; detecting an envelope of the other sub-carrier, the envelope comprising logical values ‘
1’ and
‘
0’
;recognizing data from the wireless power transmitter based on the logical values ‘
1’ and
‘
0’
;generating a communication signal comprising data to be transmitted to the wireless power transmitter; and generating an output signal based on the communication signal, the output signal comprising a sub-carrier allocated to a wireless power receiver; and transmitting the output signal to the wireless power transmitter using the sub-carrier.
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Specification