Power-receiving device, receiving power regulation method, and semiconductor device
First Claim
1. A power-receiving device, comprising:
- a transmission/reception unit including a resonant circuit having an antenna configured to receive a power transmitted from a contactless power transmitter and configured to transmit and receive data to and from the contactless charging device;
a charge control unit configured to perform power source control, including charging of a secondary cell, by using the power received by the transmission/reception unit; and
a control unit configured to generate control state data indicating a charging state of the secondary cell and/or a control state of a power source of an apparatus main unit operated with the secondary cell and configured to transmit the generated control state data to the contactless charging device through the transmission/reception unit, whereinthe control unit has;
a power-receiving mode in which the power transmitted based on the control state data is used for charging of the secondary cell through the charge control unit and/or for the power source of the apparatus main unit operated with the secondary cell; and
a regulation mode in which the received power is regulated by setting the control state data to a predetermined constant value and regulating a resonant frequency of the resonant circuit, and whereinin the regulation mode, the control unit controls the charge control unit to supply a constant power to a load.
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Accused Products
Abstract
Provided is a power-receiving device according to at least one embodiment includes: a transmission/reception unit (2) including a resonant circuit having an antenna (2a) configured to receive a power transmitted from a contactless charging device (50) and to transmit and receive data to and from the contactless charging device (50); a charge control unit (5) configured to perform power source control; and a control unit (3) configured to generate control state data indicating a charging state of the secondary cell (6) and/or a power source state of an apparatus main unit (30) operated with the secondary cell (6) and to transmit the control state data to the contactless charging device (50). The control unit (3) has a power-receiving mode in which normal power supply is performed and a regulation mode in which the received power is regulated by regulating a resonant frequency of the resonant circuit.
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Citations
17 Claims
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1. A power-receiving device, comprising:
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a transmission/reception unit including a resonant circuit having an antenna configured to receive a power transmitted from a contactless power transmitter and configured to transmit and receive data to and from the contactless charging device; a charge control unit configured to perform power source control, including charging of a secondary cell, by using the power received by the transmission/reception unit; and a control unit configured to generate control state data indicating a charging state of the secondary cell and/or a control state of a power source of an apparatus main unit operated with the secondary cell and configured to transmit the generated control state data to the contactless charging device through the transmission/reception unit, wherein the control unit has; a power-receiving mode in which the power transmitted based on the control state data is used for charging of the secondary cell through the charge control unit and/or for the power source of the apparatus main unit operated with the secondary cell; and a regulation mode in which the received power is regulated by setting the control state data to a predetermined constant value and regulating a resonant frequency of the resonant circuit, and wherein in the regulation mode, the control unit controls the charge control unit to supply a constant power to a load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A received power regulation method of regulating a power received by a power-receiving device for contactless charging, the received power regulation method comprising:
- a power-receiving mode; and
a regulation mode, whereinthe power-receiving mode includes; the step, performed by a transmission/reception unit, of receiving the power or data transmitted from a contactless charging device; the step, performed by a charge control unit, of performing power source control, including charging of a secondary cell, by using the power received by the transmission/reception unit; and the step, performed by a control unit, of generating control state data indicating a charging state of the secondary cell and/or a control state of a power source of an apparatus main unit operated with the secondary cell, transmitting the generated control state data to the contactless charging device through the transmission/reception unit, and supplying a power transmitted based on the control state data to the secondary cell through the charge control unit and/or to the power source of the apparatus main unit operated with the secondary cell, and the regulation mode includes; the step, performed by the control unit, of setting the control state data to a predetermined constant value, transmitting the control state data to the contactless charging device through the transmission/reception unit, and supplying a power transmitted based on the control state data to the secondary cell through the charge control unit and/or to the power source of the apparatus main unit operated with the secondary cell, wherein the control unit regulates the received power by regulating a resonant frequency of a resonant circuit included in the transmission/reception unit, and wherein the control unit controls the charge control unit to supply a constant power to a load. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
- a power-receiving mode; and
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17. A semiconductor device comprising a storage unit storing a received power regulation program of a power-receiving device for contactless charging, a control unit configured to load and execute the received power regulation program, the received power regulation program comprising:
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a power-receiving mode in which a power is received from a contactless charging device, the power-receiving mode including the step, performed by a transmission/reception unit, of receiving the power or data transmitted from the contactless charging device, the step, performed by a charge control unit, of performing power source control, including charging of a secondary cell, by using the power received by the transmission/reception unit, and the step, performed by the control unit, of generating control state data indicating a charging state of the secondary cell and/or a control state of a power source of an apparatus main unit operated with the secondary cell, transmitting the generated control state data to the contactless charging device through the transmission/reception unit, and supplying the power transmitted based on the control state data to the secondary cell through the charge control unit and/or to a power source for the apparatus main unit operated with the secondary cell; and a regulation mode in which the received power is regulated, the regulation mode including the step, performed by the control unit, of setting the control state data to a predetermined constant value, transmitting the control state data to the contactless charging device through the transmission/reception unit, and supplying a power transmitted based on the control state data to the secondary cell through the charge control unit and/or to the power source of the apparatus main unit operated with the secondary cell, wherein the control unit regulates the received power by regulating a resonant frequency of a resonant circuit included in the transmission/reception unit, and wherein the control unit controls the charge control unit to supply a constant power to a load.
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Specification