POWER RECEPTION DEVICE, POWER TRANSMISSION DEVICE AND WIRELESS POWER TRANSMISSION SYSTEM
First Claim
1. A power reception device comprising:
- a loop-shaped conductor;
a communication circuit configured to wirelessly communicate data via the loop-shaped conductor;
a power reception circuit configured to receive power from the loop-shaped conductor when the loop-shaped conductor is capacitively coupled with an active electrode of a power transmission device; and
a switching circuit configured to electrically couple the loop-shaped conductor to the communication circuit in a data communication state and to electrically couple the loop-shaped conductor to the power reception circuit in a power reception state.
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Accused Products
Abstract
A mobile terminal device performs short range communication with an R/W device and receives power from a power transmission device. The mobile terminal device includes a coil antenna, an RFID IC circuit that performs short range communication with the outside via the coil antenna, a charging circuit that receives power received by the coil antenna which is capacitively coupled with a passive electrode and switches that switch to a short range communication state in which short range communication is performed via the coil antenna or a power reception state in which power is received via the coil antenna. Accordingly, a power reception device, a power transmission device and a wireless power transmission system are provided with which wireless power transmission can be realized without obstructing size reduction by giving a single member two functions.
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Citations
19 Claims
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1. A power reception device comprising:
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a loop-shaped conductor; a communication circuit configured to wirelessly communicate data via the loop-shaped conductor; a power reception circuit configured to receive power from the loop-shaped conductor when the loop-shaped conductor is capacitively coupled with an active electrode of a power transmission device; and a switching circuit configured to electrically couple the loop-shaped conductor to the communication circuit in a data communication state and to electrically couple the loop-shaped conductor to the power reception circuit in a power reception state. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A power transmission device comprising:
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a loop-shaped conductor; a communication circuit configured to wirelessly communicate data via the loop-shaped conductor; a power transmission circuit configured to transmit power to an active electrode of a power reception device via the loop-shaped conductor when the active electrode is capacitively coupled to the loop-shaped conductor; and a switching circuit configured to electrically couple the loop-shaped conductor to the communication circuit in a data communication state and to electrically couple the loop-shaped conductor to the power transmission circuit in a power transmission state. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A wireless power transmission system comprising:
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a power transmission device having; a power transmission side electrode, and a voltage generating circuit configured to apply a voltage to the power transmission side electrode; and a power reception device having; a power reception side electrode capacitively coupled with the power transmission side electrode, a power reception circuit configured to receive power from the power transmission device through capacitive coupling of the power reception side electrode, a communication circuit configured to wireless communicate data via the power reception side electrode, and a switching circuit configured to electrically couple the power reception side electrode to the communication circuit in a communication state and to electrically couple the power reception side electrode to the power reception circuit in a power reception state. - View Dependent Claims (15, 16)
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17. A wireless power transmission system comprising
a power reception device having a power reception side electrode; - and
a power transmission device having; a power transmission side electrode capacitively coupled with the power reception side electrode, a voltage generating circuit configured to apply a voltage to the power transmission side electrode, a communication circuit to wirelessly communicate data via the power transmission side electrode, a switching circuit configured to electrically couple the power transmission side electrode to the communication circuit in a data communication state and to electrically couple the power transmission side electrode to the voltage generating circuit in a power transmission state. - View Dependent Claims (18, 19)
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Specification