A power reception device includes a power reception antenna used for communication and electric power reception; a rectifier circuit connected to the antenna, the rectifier circuit converting into direct current voltage, electric power received by the antenna, and the direct current voltage is output and supplied to a load; a communication section which communicates via the antenna; a switch circuit connected between the antenna and the communication section, wherein the switch circuit is transitable between a conductive state in which the communication section is electrically connected to the antenna and a cut-off state in which the communication section is electrically disconnected from the antenna; and a switch control section connected to the rectifier circuit. The switch control section transitions the switch circuit into the cut-off state when the direct current voltage output from the rectifier circuit exceeds a first threshold in association with start of the electric power reception by the antenna, and the switch control section performs transition of the switch circuit into the conductive state when the direct current voltage falls below a second threshold different from the first threshold. During signal sending by the communication section via the antenna, the switch control section does not transition the switch circuit into the cut-off state even when the direct current voltage output from the rectifier circuit exceeds the first threshold; and during the signal sending by the communication section via the antenna, the switch control section transitions the switch circuit into the cut-off state when the direct current voltage exceeds a third threshold larger than the first threshold.

A power reception device includes a power reception antenna used for communication and electric power reception; a rectifier circuit connected to the antenna, the rectifier circuit converting into direct current voltage, electric power received by the antenna, and the direct current voltage is output and supplied to a load; a communication section which communicates via the antenna; a switch circuit connected between the antenna and the communication section, wherein the switch circuit is transitable between a conductive state in which the communication section is electrically connected to the antenna and a cut-off state in which the communication section is electrically disconnected from the antenna; and a switch control section connected to the rectifier circuit. The switch control section transitions the switch circuit into the cut-off state when the direct current voltage output from the rectifier circuit exceeds a first threshold in association with start of the electric power reception by the antenna, and the switch control section performs transition of the switch circuit into the conductive state when the direct current voltage falls below a second threshold different from the first threshold. During signal sending by the communication section via the antenna, the switch control section does not transition the switch circuit into the cut-off state even when the direct current voltage output from the rectifier circuit exceeds the first threshold; and during the signal sending by the communication section via the antenna, the switch control section transitions the switch circuit into the cut-off state when the direct current voltage exceeds a third threshold larger than the first threshold.

A method of controlling a wireless power receiver. The method includes receiving, by a power receiver, power from a wireless power transmitter; receiving, from the wireless power transmitter, a time set value that is set for checking cross connection; in response to receiving the time set value, generating a power variation in the wireless power receiver by converting a load status from a first load status to a second load status; and maintaining the second load status for a time corresponding to the received time set value.

A charging device for charging one or more electronic devices is provided. The charging device includes a charging unit configured to include a first charging unit, and a second charging unit, the second charging unit protruding upward from a surface of the charging unit at an angle greater than or equal to a predetermined reference angle with respect to the surface of the charging unit, wherein, if at least one of the first charging unit and the second charging unit is arranged to face at least one electronic device in a face-to-face manner, the at least one of the first charging unit and the second charging unit supplies wireless power to the at least one electronic device.

A charging device for charging one or more electronic devices is provided. The charging device includes a charging unit configured to include a first charging unit, and a second charging unit, the second charging unit protruding upward from a surface of the charging unit at an angle greater than or equal to a predetermined reference angle with respect to the surface of the charging unit, wherein, if at least one of the first charging unit and the second charging unit is arranged to face at least one electronic device in a face-to-face manner, the at least one of the first charging unit and the second charging unit supplies wireless power to the at least one electronic device.

According to the embodiments provided herein, power and data transfer system may include a primary inductive, a secondary inductive coupler, a power source, and a controller. The primary inductive coupler may forms a flat front face. The primary inductive coupler may include a primary winding wound around a primary core. The primary core may be adjacent to the flat front face. The secondary inductive coupler may be separated from the flat front face of the primary inductive coupler by a fluid. The secondary inductive coupler may include a secondary winding. The power source may generate a current in the primary winding of the primary inductive coupler and a magnetic field in the secondary winding of the secondary inductive coupler. The controller may execute machine readable instructions to receive charging data via a feedback loop and adjust the current based upon the charging data.

According to the embodiments provided herein, power and data transfer system may include a primary inductive, a secondary inductive coupler, a power source, and a controller. The primary inductive coupler may forms a flat front face. The primary inductive coupler may include a primary winding wound around a primary core. The primary core may be adjacent to the flat front face. The secondary inductive coupler may be separated from the flat front face of the primary inductive coupler by a fluid. The secondary inductive coupler may include a secondary winding. The power source may generate a current in the primary winding of the primary inductive coupler and a magnetic field in the secondary winding of the secondary inductive coupler. The controller may execute machine readable instructions to receive charging data via a feedback loop and adjust the current based upon the charging data.

Provided is a wireless power supply control system including a control apparatus controlling driving of one or more driving devices in accordance with a plurality of predetermined driving patterns, a first radio having a directional antenna, and a second radio driven by power supply radio waves transmitted from the first radio. Target driving directivity information corresponding to a target driving pattern acquired by an acquisition unit is selected from among pieces of driving directivity information relating to a directivity applied to the directional antenna, in a state in which driving of the driving devices is controlled by the control apparatus in accordance with the driving patterns, the selected target driving directivity information is applied to the directional antenna of the first radio, and wireless power supply from the first radio to the second radio is executed.

An apparatus and method for transmission of wireless power to a plurality of chargeable devices. The apparatus and method include and provide for a wireless power transmitter including a power transmitting element configured to use a current at a first level to wirelessly transmit power sufficient to provide power to one or more chargeable devices positioned within a charging region. The apparatus and method further include and provide for a controller to detect a subsequent chargeable device positioned within the charging region and to adjust the current from the first level to a default level prior to communication with the subsequent chargeable device.

An apparatus and method for transmission of wireless power to a plurality of chargeable devices. The apparatus and method include and provide for a wireless power transmitter including a power transmitting element configured to use a current at a first level to wirelessly transmit power sufficient to provide power to one or more chargeable devices positioned within a charging region. The apparatus and method further include and provide for a controller to detect a subsequent chargeable device positioned within the charging region and to adjust the current from the first level to a default level prior to communication with the subsequent chargeable device.