POWER RECEPTION DEVICE, POWER TRANSMISSION DEVICE AND WIRELESS POWER TRANSMISSION SYSTEM

摘要

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.

主权项

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.