Wireless power receiving device, receiver circuit thereof, and control method of wireless power receiving device
First Claim
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1. A wireless power receiving device, comprising:
- a receiving antenna;
a rectifier circuit connected to the receiving antenna, that generates a rectified voltage;
a charging circuit to receive the rectified voltage and charge a power storage device; and
a modulator that modulates a voltage or current of the receiving antenna by changing a charging current of the charging circuit based on data to be transmitted to a wireless power transmitting device,wherein the charging circuit allows the charging current to be switched between a first current amount and a second current amount, andwherein the charging circuit includes;
a first current source configured to continuously supply the first current amount to the power storage device during an operation time of the charging circuit; and
a second current source configured to supply an additive current amount, which is a differential current between the first current amount and the second current amount, to the power storage device in an on-off manner according to the data.
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Abstract
The wireless power receiving device includes a receiving antenna, a rectifier circuit connected to the receiving antenna, that generates a rectified voltage, a charging circuit to receive the rectified voltage and charge a power storage device, and a modulator that modulates a voltage or current of the receiving antenna by changing a charging current of the charging circuit based on data to be transmitted to a wireless power transmitting device.
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Citations
6 Claims
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1. A wireless power receiving device, comprising:
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a receiving antenna; a rectifier circuit connected to the receiving antenna, that generates a rectified voltage; a charging circuit to receive the rectified voltage and charge a power storage device; and a modulator that modulates a voltage or current of the receiving antenna by changing a charging current of the charging circuit based on data to be transmitted to a wireless power transmitting device, wherein the charging circuit allows the charging current to be switched between a first current amount and a second current amount, and wherein the charging circuit includes; a first current source configured to continuously supply the first current amount to the power storage device during an operation time of the charging circuit; and a second current source configured to supply an additive current amount, which is a differential current between the first current amount and the second current amount, to the power storage device in an on-off manner according to the data.
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2. A wireless power receiving device comprising:
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a receiving antenna; a rectifier circuit connected to the receiving antenna, that generates a rectified voltage; and a modulator that is provided on a path of a current flowing from the rectifier circuit into a load and modulates a voltage or current of the receiving antenna by changing the current flowing into the load based on data to be transmitted to a wireless power transmitting device, wherein the modulator is configured to; allow the current flowing into the load to be switched between a first current amount and a second current amount; control a first current source that continuously supplies the first current amount to the load during an operation time of the modulator; and control a second current source that supplies an additive current amount, which is a differential current between the first current amount and the second current amount, to the load according in an on-off manner to the data.
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3. A receiver circuit for use in a wireless power receiving device together with a receiving antenna comprising:
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a rectifier circuit connected to the receiving antenna, that generates a rectified voltage; a charging circuit to receive the rectified voltage and charge a power storage device; and a modulator that modulates a voltage or current of the receiving antenna by changing a charging current of the charging circuit based on data to be transmitted to a wireless power transmitting device, wherein the charging circuit allows the charging current to be switched between a first current amount and a second current amount, and wherein the charging circuit includes; a first current source configured to continuously supply the first current amount to the power storage device during an operation time of the charging circuit; and a second current source configured to supply an additive current amount, which is a differential current between the first current amount and the second current amount, to the power storage device in an on-off manner according to the data. - View Dependent Claims (4)
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5. A receiver circuit for use in a wireless power receiving device together with a receiving antenna comprising:
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a rectifier circuit connected to the receiving antenna, that generates a rectified voltage; and a modulator that is provided on a path of a current flowing from the rectifier circuit into a load and modulates a voltage or current of the receiving antenna by changing the current flowing into the load based on data to be transmitted to a wireless power transmitting device, wherein the modulator is configured to; allow the current flowing into the load to be switched between a first current amount and a second current amount; control a first current source that continuously supplies the first current amount to the load during an operation time of the modulator; and control a second current source that supplies an additive current amount, which is a differential current between the first current amount and the second current amount, to the load in an on-off manner according to the data.
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6. A control method of a wireless power receiving device comprising:
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receiving a power signal at a receiving antenna, rectifying a current induced in the receiving antenna and generating a rectified voltage, charging a power storage device based on the rectified voltage, modulating a voltage or current of the receiving antenna by changing a charging current for the power storage device based on data to be transmitted to a wireless power transmitting device, and transmitting the data to the wireless power transmitting device, wherein changing the charging current includes switching the charging current between a first current amount and a second current amount by; continuously supplying the first current amount to the power storage device during the act of charging the power storage device; and supplying an additive current amount, which is a differential current between the first current amount and the second current amount, to the power storage device in an on-off manner according to the data.
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Specification