WIRELESS POWER FEEDING UNIT, ELECTRONIC APPARATUS, AND METHOD OF CONTROLLING WIRELESS POWER FEEDING UNIT

摘要

A wireless power feeding unit includes a receiving antenna; a control circuit having a wireless communication function in accordance with a communication standard; an impedance matching circuit, connected between the receiving antenna and the control circuit, for impedance matching between the receiving antenna and the control circuit; a conversion circuit converting alternate-current power into a direct-current voltage; a resonant circuit connected between the receiving antenna and the conversion circuit, receiving, in a resonant condition, electromagnetic energy via the receiving antenna, and outputting alternate-current power; and a switch circuit, based on a control signal from the control circuit, connecting the receiving antenna with the impedance matching circuit or the resonant circuit selectively. The control circuit controls the switch circuit so as to connect the receiving antenna with the impedance matching circuit for wireless communication and connect the receiving antenna with the resonant circuit for wireless power feeding.

主权项

1. A wireless power feeding unit comprising:
a receiving antenna; a control circuit that has a wireless communication function which is in accordance with a predetermined communication standard; an impedance matching circuit that is connected between the receiving antenna and the control circuit, and carries out impedance matching between the receiving antenna and the control circuit; a conversion circuit that converts alternate-current power into a direct-current voltage; a resonant circuit connected between the receiving antenna and the conversion circuit, the resonant circuit receiving, in a resonant condition, electromagnetic energy received by the receiving antenna, and outputting alternate-current power; and a switch circuit that, based on a control signal from the control circuit, connects the receiving antenna with the impedance matching circuit or the resonant circuit selectively, wherein the control circuit controls the switch circuit so as to cause the switch circuit to connect the receiving antenna with the impedance matching circuit at a time of carrying out wireless communication and connect the receiving antenna with the resonant circuit at a time of carrying out wireless power feeding.