Apparatus and method for wireless charging
First Claim
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1. A wireless charging apparatus, comprising:
- an antenna that receives electrical waves;
a first charging power generator including a first switch that connects the first charging power generator to the antenna in response to a first control signal, the first charging power generator generating charging power for charging a battery using the electrical waves received by the antenna;
a second charging power generator including a second switch that connects the second charging power generator to the antenna in response to a second control signal, the second charging power generator generating charging power for charging the battery using the electrical waves received through the antenna; and
a controller that senses a frequency of the electrical waves received through the antenna, activates the first control signal when the sensed frequency corresponds to a first frequency band, and activates the second control signal when the sensed frequency corresponds to a second frequency band lower than the first frequency band.
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Abstract
A wireless charging apparatus is provided. The wireless charging apparatus includes: an antenna that receives electrical waves; at least two charging power generators that generate charging power for charging a battery using the electrical waves received through the antenna; and a controller that senses a frequency of the electrical waves received through the antenna and that activates one of the at least two charging power generators according to a sensed result.
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Citations
18 Claims
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1. A wireless charging apparatus, comprising:
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an antenna that receives electrical waves; a first charging power generator including a first switch that connects the first charging power generator to the antenna in response to a first control signal, the first charging power generator generating charging power for charging a battery using the electrical waves received by the antenna; a second charging power generator including a second switch that connects the second charging power generator to the antenna in response to a second control signal, the second charging power generator generating charging power for charging the battery using the electrical waves received through the antenna; and a controller that senses a frequency of the electrical waves received through the antenna, activates the first control signal when the sensed frequency corresponds to a first frequency band, and activates the second control signal when the sensed frequency corresponds to a second frequency band lower than the first frequency band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A wireless charging apparatus, comprising:
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an antenna that receives electrical waves; an impedance matching unit comprising a plurality of capacitors activated by a plurality of first control signals, the impedance matching unit performing impedance matching of the electrical waves received through the antenna with an impedance value generated by the plurality of capacitors; a charging power generator that generates charging power for charging a battery using electrical waves output from the impedance matching unit; and a controller that senses a frequency band of the electrical waves received through the antenna generates the plurality of first control signals according to the sensed frequency band, and outputs the plurality of first control signals to the impedance matching unit. - View Dependent Claims (15, 16, 17)
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18. A wireless charging method, comprising:
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receiving electrical waves through an antenna; determining whether a frequency of the received electrical waves corresponds to one of a first frequency band and a second frequency band lower than the first frequency band; activating, by a controller, a first control signal when the frequency corresponds to the first frequency band and a second control signal when the frequency corresponds to the second frequency band; and charging a battery with the electrical waves, by a first charging power generator, by activating a first switch in response to the first control signal; charging the battery with the electrical waves, by a second charging power generator, by activating a second switch in response to the second control signal.
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Specification