Abstract: A power transmitting apparatus sets, on the basis of transmission power set with the power receiving apparatus, a first threshold for determining whether or not a foreign object exist, and a second threshold lower than the first threshold. The first and second threshold are set so that the difference between the first and second threshold values becomes larger as the set transmission power becomes larger. The power transmitting apparatus determines: that a foreign object exists in a case where the power loss is greater than the first threshold; that a foreign object does not exist in a case where the power loss is less than the second threshold; and that there is a possibility of a foreign object existing in a case where the power loss is between the first threshold and the second threshold.

Abstract: A power receiving apparatus, which has a first communication function and a second communication function, controls the first communication function to receive a first signal including information representing whether a power transmission apparatus can execute control communication using a second method, controls, based on the information representing that the power transmission apparatus can execute the control communication using the second method, the first communication function to transmit, to the power transmission apparatus, a second signal to request identification information of the power transmission apparatus for the communication of the second method and receive the identification information from the power transmission apparatus, and determines which one of the first communication function and a second communication function should be used for the control communication, based on the first signal and whether the identification information is received.

Abstract: A power transmitting apparatus sets, on the basis of transmission power set with the power receiving apparatus, a first threshold for determining whether or not a foreign object exist, and a second threshold lower than the first threshold. The first and second threshold are set so that the difference between the first and second threshold values becomes larger as the set transmission power becomes larger. The power transmitting apparatus determines: that a foreign object exists in a case where the power loss is greater than the first threshold; that a foreign object does not exist in a case where the power loss is less than the second threshold; and that there is a possibility of a foreign object existing in a case where the power loss is between the first threshold and the second threshold.

Abstract: A power transmission apparatus that transmits power wirelessly to a power receiving apparatus by using power supplied from a power supply apparatus includes a first authentication unit configured to execute device authentication with the power supply apparatus, a second authentication unit configured to execute device authentication with the power receiving apparatus, and a control unit that performs negotiation related to transmission power with the power receiving apparatus based on a result of the device authentication by the first authentication unit and a result of the device authentication by the second authentication unit.

Abstract: A control unit 201 of a power receiving apparatus 200 performs a predetermined communication to a power transmitting apparatus 100 via a first communication unit 204 such that power transfer from the power transmitting apparatus 100 is continued, in a case where a control communication using the first communication unit 204 is switched to a control communication using a second communication unit 202.

Abstract: A power transmission apparatus has a first communication function for communicating with a power reception apparatus and a second communication function for communicating with the power reception apparatus at a radio frequency different from a radio frequency used in the first communication function, and makes a decision as to whether to use the first communication function or the second communication function in communication for controlling wireless transmission of power, the decision being made on the basis of device information obtained from the power reception apparatus through communication using the first communication function.

Abstract: A power transmission apparatus comprises: transmission unit configured to perform wireless power transmission to a power reception apparatus; first communication unit configured to perform communication via a first communication method; and second communication unit configured to perform communication via a second communication method, wherein, in a case where the transmission unit stops wireless power transmission to the power reception apparatus in a state in which the second communication unit and the power reception apparatus are connected based on information transmitted and received between the first communication unit and the power reception apparatus, the second communication unit performs communication to connect the second communication unit and the power reception apparatus.

Abstract: A control unit 201 of a power receiving apparatus 200 performs a predetermined communication to a power transmitting apparatus 100 via a first communication unit 204 such that power transfer from the power transmitting apparatus 100 is continued, in a case where a control communication using the first communication unit 204 is switched to a control communication using a second communication unit 202.

Abstract: A power transmission apparatus includes a first power transmission unit configured to perform wireless power transmission to a power receiving apparatus in a first region by using at least one of a plurality of coils, a second power transmission unit configured to perform wireless power transmission to a power receiving apparatus in a second region by using at least one of the plurality of coils. In a case where, while the first power transmission unit performs wireless power transmission to a first power receiving apparatus in a common region where the first region and the second region overlap, a second power receiving apparatus is placed in a region of the first region other than the common region, the first power transmission unit stops the wireless power transmission to the first power receiving apparatus and the second power transmission unit performs wireless power transmission to the first power receiving apparatus.

Abstract: Foreign substance detection can be performed with a simple configuration in a power transmission system. A power transmitting apparatus that wirelessly transmits power to a power receiving apparatus, the power transmitting apparatus comprises: determination means for, in a case where an initial impedance value and the detected output impedance value do not match and there is no change in the output impedance value between before and after the transmission of a predetermined detection signal, determining that a foreign substance is present within a predetermined power transmission range, and, in a case where the initial impedance value and the detected output impedance value do not match and there is a change in the output impedance value between before and after the transmission of the predetermined detection signal, determining that a power receiving apparatus is present within the predetermined power transmission range.

Abstract: A power transmission apparatus has a first communication function for communicating with a power reception apparatus and a second communication function for communicating with the power reception apparatus at a radio frequency different from a radio frequency used in the first communication function, and makes a decision as to whether to use the first communication function or the second communication function in communication for controlling wireless transmission of power, the decision being made on the basis of device information obtained from the power reception apparatus through communication using the first communication function.

Abstract: A power transmission apparatus performs object detection, perform wireless power transmission to the power receiving apparatus via at least one of a plurality of coils. The power transmission apparatus, in a power transfer phase, stops the wireless power transmission for a specific period and, in the specific period, outputs a signal for object detection from a coil that is from among the plurality of coils and is different from the at least one of the plurality of coils.

Abstract: A power transmission apparatus performs wireless power transmission to a power receiving apparatus using at least one of a plurality of coils including a first coil and a second coil disposed at a position closer to the first coil than a position separated from the first coil by a specific distance, and perform object detection by outputting one or more signal for object detection from one or more of the plurality of coils. Signals for object detection are not outputted at a same time from the first coil and the second coil.

Abstract: Foreign substance detection can be performed with a simple configuration in a power transmission system. A power transmitting apparatus that wirelessly transmits power to a power receiving apparatus, the power transmitting apparatus comprises: determination means for, in a case where an initial impedance value and the detected output impedance value do not match and there is no change in the output impedance value between before and after the transmission of a predetermined detection signal, determining that a foreign substance is present within a predetermined power transmission range, and, in a case where the initial impedance value and the detected output impedance value do not match and there is a change in the output impedance value between before and after the transmission of the predetermined detection signal, determining that a power receiving apparatus is present within the predetermined power transmission range.

Abstract: A power transmission apparatus that transmits power wirelessly to a power receiving apparatus by using power supplied from a power supply apparatus includes a first authentication unit configured to execute device authentication with the power supply apparatus, a second authen-tication unit configured to execute device authentication with the power receiving apparatus, and a control unit that performs negotiation related to transmission power with the power receiving apparatus based on a result of the device authentication by the first authentication unit and a result of the device authentication by the second authentication unit.

Abstract: A power receiving apparatus, which has a first communication function and a second communication function, controls the first communication function to receive a first signal including information representing whether a power transmission apparatus can execute control communication using a second method, controls, based on the information representing that the power transmission apparatus can execute the control communication using the second method, the first communication function to transmit, to the power transmission apparatus, a second signal to request identification information of the power transmission apparatus for the communication of the second method and receive the identification information from the power transmission apparatus, and determines which one of the first communication function and a second communication function should be used for the control communication, based on the first signal and whether the identification information is received.

Abstract: A power transmission apparatus 100 wirelessly transmits power to a power receiving device 102 via a power transmission coil 304, measures a Q factor of the power transmission coil 304 in the time domain, and determines presence or absence of an object (foreign object) different from the power receiving apparatus 102 based on the Q factor measured in the time domain and a reference value of the Q factor which is based on information obtained from the power receiving apparatus 102.

Abstract: A power transmitting apparatus (100) performs foreign object detection processing based on data obtained by transmitting power to a plurality of power receiving apparatuses (204, 205) using a plurality of power transmission units.

Abstract: A power reception apparatus wirelessly receives power from a power transmission apparatus, measures a value corresponding to received power in a first period in which the power transmission apparatus limits power transmission, measures, in a second period, a value corresponding to received power used to detect an object different from the power transmission apparatus and the power reception apparatus based on a relationship between a value corresponding to transmitted power in the power transmission apparatus and a value corresponding to the received power in the power reception apparatus, controls a timing of the second period such that the first period and the second period do not overlap.

Abstract: A control unit 201 of a power receiving apparatus 200 performs a predetermined communication to a power transmitting apparatus 100 via a first communication unit 204 such that power transfer from the power transmitting apparatus 100 is continued, in a case where a control communication using the first communication unit 204 is switched to a control communication using a second communication unit 202.