Abstract: A power receiving apparatus wirelessly receives power from a power transmitting apparatus, and communicates with the power transmitting apparatus by load modulation of the received power. A degree of modulation of the load modulation is changed in a case where a response signal from the power transmitting apparatus in response to a specific signal is not received within a predetermined period.

Abstract: A power transmitting apparatus wirelessly transmits power to a power receiving apparatus, and communicates with the power receiving apparatus. The power transmitting apparatus transmits, to the power receiving apparatus, a signal to request a change in a degree of modulation of a load modulation signal, which is received from the power receiving apparatus, in accordance with an amplitude of the load modulation signal.

Abstract: A wireless transmission system includes first and second transmission line couplers. The first transmission line coupler is arranged in an annular shape and formed of a pair of signal lines that transmit a differential signal. The second transmission line coupler is shorter than the first transmission line coupler and formed of a pair of signal lines that transmit a differential signal. The first and second transmission line couplers are arranged so that, if at least one of the first and second transmission line couplers rotates about a rotational axis and if one of the signal lines of the second transmission line coupler crosses a gap between the ends of one of the signal lines of the first transmission line coupler, the other signal line of the second transmission line coupler does not cross a gap between the ends of the other signal line of the first transmission line coupler.

Abstract: A communication apparatus includes first communication means having a first communication function for wirelessly communicating with a partner apparatus, and second communication means having an electric power supply function for wirelessly supplying electric power to the partner apparatus and a second communication function for wirelessly communicating with the partner apparatus. The second communication function is for transmitting specific data sequence to the partner apparatus in response to reception of specific data from the partner apparatus, and the electric power supply function is for supplying electric power to the partner apparatus in a case of receiving from the partner apparatus, with the first communication means, a signal indicating that the partner apparatus has received the data sequence.

Abstract: A wireless transmission system includes first and second transmission line couplers. The first transmission line coupler is arranged in an annular shape and formed of a pair of signal lines that transmit a differential signal. The second transmission line coupler is shorter than the first transmission line coupler and formed of a pair of signal lines that transmit a differential signal. The first and second transmission line couplers are arranged so that, if at least one of the first and second transmission line couplers rotates about a rotational axis and if one of the signal lines of the second transmission line coupler crosses a gap between the ends of one of the signal lines of the first transmission line coupler, the other signal line of the second transmission line coupler does not cross a gap between the ends of the other signal line of the first transmission line coupler.

Abstract: A communication apparatus includes first communication means having a first communication function for wirelessly communicating with a partner apparatus, and second communication means having an electric power supply function for wirelessly supplying electric power to the partner apparatus and a second communication function for wirelessly communicating with the partner apparatus. The second communication function is for transmitting specific data sequence to the partner apparatus in response to reception of specific data from the partner apparatus, and the electric power supply function is for supplying electric power to the partner apparatus in a case of receiving from the partner apparatus, with the first communication means, a signal indicating that the partner apparatus has received the data sequence.

Abstract: A first power receiving apparatus observes a power transfer signal from a power supply apparatus, and detects whether power transfer is being performed between the power supply apparatus and a second power receiving apparatus. When the power transfer is being performed between the power supply apparatus and the second power receiving apparatus, a waveform of the signal is deformed with a predetermined pattern. The second power receiving apparatus detects deterioration in power which is received from the power supply apparatus and detects whether the waveform of the signal changes with the predetermined pattern within a predetermined time after detecting the power deterioration. When detecting the change in the waveform of the signal with the predetermined pattern, the second power receiving apparatus determines that the first power receiving apparatus is in a power suppliable range of the power supply apparatus.

Abstract: A communication apparatus includes first communication means having a first communication function for wirelessly communicating with a partner apparatus, and second communication means having an electric power supply function for wirelessly supplying electric power to the partner apparatus and a second communication function for wirelessly communicating with the partner apparatus. The second communication function is for transmitting specific data sequence to the partner apparatus in response to reception of specific data from the partner apparatus, and the electric power supply function is for supplying electric power to the partner apparatus in a case of receiving from the partner apparatus, with the first communication means, a signal indicating that the partner apparatus has received the data sequence.

Abstract: A communication apparatus includes first communication means having a first communication function for wirelessly communicating with a partner apparatus, and second communication means having an electric power supply function for wirelessly supplying electric power to the partner apparatus and a second communication function for wirelessly communicating with the partner apparatus. The second communication function is for transmitting specific data sequence to the partner apparatus in response to reception of specific data from the partner apparatus, and the electric power supply function is for supplying electric power to the partner apparatus in a case of receiving from the partner apparatus, with the first communication means, a signal indicating that the partner apparatus has received the data sequence.

Abstract: A first power receiving apparatus observes a power transfer signal from a power supply apparatus, and detects whether power transfer is being performed between the power supply apparatus and a second power receiving apparatus. When the power transfer is being performed between the power supply apparatus and the second power receiving apparatus, a waveform of the signal is deformed with a predetermined pattern. The second power receiving apparatus detects deterioration in power which is received from the power supply apparatus and detects whether the waveform of the signal changes with the predetermined pattern within a predetermined time after detecting the power deterioration. When detecting the change in the waveform of the signal with the predetermined pattern, the second power receiving apparatus determines that the first power receiving apparatus is in a power suppliable range of the power supply apparatus.

Abstract: A first power receiving apparatus observes a power transfer signal from a power supply apparatus, and detects whether power transfer is being performed between the power supply apparatus and a second power receiving apparatus. When the power transfer is being performed between the power supply apparatus and the second power receiving apparatus, a waveform of the signal is deformed with a predetermined pattern. The second power receiving apparatus detects deterioration in power which is received from the power supply apparatus and detects whether the waveform of the signal changes with the predetermined pattern within a predetermined time after detecting the power deterioration. When detecting the change in the waveform of the signal with the predetermined pattern, the second power receiving apparatus determines that the first power receiving apparatus is in a power suppliable range of the power supply apparatus.

Abstract: A power transmission device sets, as a target of power transmission, a second power reception device that has transmitted a notification signal including predetermined information while power transmission, using electromagnetic waves modulated to transmit the predetermined information, is being performed to a first power reception device, where the setting the second power reception device as a target of the power transmission performed is performed depending on a result of a negotiation with the second power reception device.

Abstract: A wireless power transmission apparatus includes a first antenna unit configured to perform wireless power transmission with another apparatus, a communication unit configured to include a second antenna unit which is different from the first antenna unit and perform communication for authentication in the wireless power transmission with the other apparatus using electric power received through the first antenna unit, a load configured to operate using the electric power received through the first antenna unit; and a transformation unit configured to be connected to the first antenna unit and perform impedance transformation. The transformation unit performs impedance transformation in accordance with electric power consumed by the communication unit during the communication for authentication performed by the communication unit and performs impedance transformation in accordance with electric power consumed by the load when the authentication is successfully performed.

Abstract: An apparatus includes a recognition unit configured to recognize a function included in a communication partner and a determination unit configured to determine processing, which the communication partner performs on transmission data, according to the recognized function and a type of the transmission data.

Abstract: A communication apparatus includes first communication means having a first communication function for wirelessly communicating with a partner apparatus, and second communication means having an electric power supply function for wirelessly supplying electric power to the partner apparatus and a second communication function for wirelessly communicating with the partner apparatus. The second communication function is for transmitting specific data sequence to the partner apparatus in response to reception of specific data from the partner apparatus, and the electric power supply function is for supplying electric power to the partner apparatus in a case of receiving from the partner apparatus, with the first communication means, a signal indicating that the partner apparatus has received the data sequence.

Abstract: A communication apparatus includes first communication means having a first communication function for wirelessly communicating with a partner apparatus, and second communication means having an electric power supply function for wirelessly supplying electric power to the partner apparatus and a second communication function for wirelessly communicating with the partner apparatus. The second communication function is for transmitting specific data sequence to the partner apparatus in response to reception of specific data from the partner apparatus, and the electric power supply function is for supplying electric power to the partner apparatus in a case of receiving from the partner apparatus, with the first communication means, a signal indicating that the partner apparatus has received the data sequence.

Abstract: The present invention provides an antenna in which first and second conductors each having a first width are spirally arranged on first and second planes, respectively, such that a conductor-to-conductor distance is equal to a second width, and an inter ends of spirals of the first and second conductors are connected with a conductor. In this antenna, the direction in which the spiral of the first conductor runs from its outer end to its inter end and the direction in which the spiral of the second conductor runs from its inter end to its outer end correspond to each other, the first width is greater than or equal to the second width, and the first and second conductors are alternately arranged in at least a portion thereof as viewed in a radius direction from an axis of the spiral.

Abstract: A power transmission device sets, as a target of power transmission, a second power reception device that has transmitted a notification signal including predetermined information while power transmission, using electromagnetic waves modulated to transmit the predetermined information, is being performed to a first power reception device, where the setting the second power reception device as a target of the power transmission performed is performed depending on a result of a negotiation with the second power reception device.

Abstract: The present invention relates to a wireless power transmission system in which power transmission efficiency and safety go hand in hand. A power receiving apparatus includes a requesting unit configured to request power from a power transmitting apparatus; a detection unit configured to detect that the power transmitting apparatus has started transmission of the power requested by the requesting unit, an antenna configured to receive power wirelessly transmitted from the power transmitting apparatus, a load unit configured to operate using the power received through the antenna, and a switching unit configured to switch, in accordance with detection performed by the detection unit, a disconnected state in which the antenna and the load unit are disconnected from each other to a connected state in which the antenna and the load unit are connected to each other.

Abstract: A wireless power transmission apparatus includes a first antenna unit configured to perform wireless power transmission with another apparatus, a communication unit configured to include a second antenna unit which is different from the first antenna unit and perform communication for authentication in the wireless power transmission with the other apparatus using electric power received through the first antenna unit, a load configured to operate using the electric power received through the first antenna unit; and a transformation unit configured to be connected to the first antenna unit and perform impedance transformation. The transformation unit performs impedance transformation in accordance with electric power consumed by the communication unit during the communication for authentication performed by the communication unit and performs impedance transformation in accordance with electric power consumed by the load when the authentication is successfully performed.