Abstract: A second transmission path coupler has such a size that a signal width of a first signal that is generated by the second transmission path coupler at timings corresponding to a rising edge and a falling edge of an input signal to be input to a first transmission path coupler in a case where the input signal is transmitted to a position at which the first transmission path coupler and the second transmission path coupler perform an electric field and/or magnetic field coupling is substantially equal to or greater than a difference in a transmission delay amount corresponding to a gap of the first transmission path coupler.

Abstract: A wireless power transmission system includes a first power transmission circuit configured to output first power to be transmitted, a second power transmission circuit configured to output second power to be transmitted, a plurality of power transmission coils, a first power reception coil configured to be movable relative to the plurality of power transmission coils and wirelessly receive the first power from one of the power transmission coils, a second power reception coil configured to be movable relative to the plurality of power transmission coils and wirelessly receive the second power from one of the power transmission coils, and a first switch configured to connect a power transmission coil opposed to the first power reception coil among the plurality of power transmission coils to the first power transmission circuit, and connect a power transmission coil opposed to the second power reception coil to the second power transmission circuit.

Abstract: A communication system includes a transmission line and a reception coupler that couples to the transmission line in an electromagnetic field and moves along the transmission line, wherein the reception coupler has end parts narrower than other parts with respect to a transmission direction of the transmission line.

Abstract: A second transmission path coupler has such a size that a signal width of a first signal that is generated by the second transmission path coupler at timings corresponding to a rising edge and a falling edge of an input signal to be input to a first transmission path coupler in a case where the input signal is transmitted to a position at which the first transmission path coupler and the second transmission path coupler perform an electric field and/or magnetic field coupling is substantially equal to or greater than a difference in a transmission delay amount corresponding to a gap of the first transmission path coupler.

Abstract: A wireless transmission system includes a first transmission line coupler including a pair of signal lines for differential signal transmission with a first end of each signal line connected to a reception unit and another end of each signal line connected to a termination resistor; a second transmission line coupler being shorter than the first transmission line coupler and contactlessly facing the first transmission line coupler to communicate an electric signal with the first transmission line coupler using electric field and/or magnetic field coupling; and a metal plate covering at least a part of a portion of the first transmission line coupler that does not face the second transmission line coupler.

Abstract: A wireless transmission system includes a first transmission line coupler including a pair of signal lines for differential signal transmission with a first end of each signal line connected to a reception unit and another end of each signal line connected to a termination resistor; a second transmission line coupler being shorter than the first transmission line coupler and contactlessly facing the first transmission line coupler to communicate an electric signal with the first transmission line coupler using electric field and/or magnetic field coupling; and a metal plate covering at least a part of a portion of the first transmission line coupler that does not face the second transmission line coupler.

Abstract: A second transmission path coupler has such a size that a signal width of a first signal that is generated by the second transmission path coupler at timings corresponding to a rising edge and a falling edge of an input signal to be input to a first transmission path coupler in a case where the input signal is transmitted to a position at which the first transmission path coupler and the second transmission path coupler perform an electric field and/or magnetic field coupling is substantially equal to or greater than a difference in a transmission delay amount corresponding to a gap of the first transmission path coupler.

Abstract: A communication system includes a transmission line and a reception coupler that couples to the transmission line in an electromagnetic field and moves along the transmission line, wherein the reception coupler has end parts narrower than other parts with respect to a transmission direction of the transmission line.

Abstract: A power transmitting apparatus that transmits power to a power receiving apparatus executes intermittent wireless transmission of power. The power transmitting apparatus operates according to one of a first power transmitting method including detecting a signal load-modulated by the power receiving apparatus using an ID in response to the transmitted power during the intermittent transmission and a second power transmitting method including transmitting the power having modulated the power according to an ID determined in advance so that the power receiving apparatus detects the ID determined in advance.

Abstract: A wireless power transfer device includes a wireless power transfer unit that wirelessly transfers power to a plurality of other devices and a notification unit that provides notification that wireless power transfer to a third wireless power transfer device different from a second wireless power transfer device is not available or provides notification that the wireless power transfer to the third wireless power transfer device is available in the case where wireless power transfer to the second wireless power transfer device is performed.

Abstract: A power transmitting apparatus that transmits power to a power receiving apparatus executes intermittent wireless transmission of power. The power transmitting apparatus operates according to one of a first power transmitting method including detecting a signal load-modulated by the power receiving apparatus using an ID in response to the transmitted power during the intermittent transmission and a second power transmitting method including transmitting the power having modulated the power according to an ID determined in advance so that the power receiving apparatus detects the ID determined in advance.

Abstract: A power transmitting apparatus that transmits power to a power receiving apparatus executes intermittent wireless transmission of power. The power transmitting apparatus operates according to one of a first power transmitting method including detecting a signal load-modulated by the power receiving apparatus using an ID in response to the transmitted power during the intermittent transmission and a second power transmitting method including transmitting the power having modulated the power according to an ID determined in advance so that the power receiving apparatus detects the ID determined in advance.

Abstract: A wireless communication system includes a first communication apparatus including a first antenna and a second antenna, a second communication apparatus including a third antenna and a fourth antenna, a first communication control unit that controls wireless communication based on electric field coupling or magnetic field coupling between the first antenna and the third antenna, and a second communication control unit that controls wireless communication based on electric field coupling or magnetic field coupling between the second antenna and the fourth antenna.

Abstract: A wireless communication system includes a first communication apparatus including a first antenna and a second antenna, a second communication apparatus including a third antenna and a fourth antenna, a first communication control unit that controls wireless communication based on electric field coupling or magnetic field coupling between the first antenna and the third antenna, and a second communication control unit that controls wireless communication based on electric field coupling or magnetic field coupling between the second antenna and the fourth antenna.

Abstract: A wireless communication system includes a first communication apparatus including a first antenna and a second antenna, a second communication apparatus including a third antenna and a fourth antenna, a first communication control unit that controls wireless communication based on electric field coupling or magnetic field coupling between the first antenna and the third antenna, and a second communication control unit that controls wireless communication based on electric field coupling or magnetic field coupling between the second antenna and the fourth antenna.

Abstract: An object of the present invention is to transmit a request for a setting of power transmission in accordance with change of power consumption to a power transmission apparatus. A power reception apparatus according to the present invention includes a power reception unit which wirelessly receives electric power from a power transmission apparatus, a detection unit which detects an instruction for controlling a load unit which operates using the electric power received by the power reception unit, and a transmission unit which transmits, to the power transmission apparatus, a request for changing an amount of reception power in accordance with change of an amount of power consumption of the load unit caused when the load unit is operated in response to the instruction detected by the detection unit while the power reception unit receives the electric power, before the load unit is operated in response to the instruction.

Abstract: A power transmitting apparatus that wirelessly transmits power to one or more power receiving apparatuses determines whether each of the one or more power receiving apparatuses has a function for internally lowering a voltage obtained through power reception, and controls the transmitted power so that, in a case where at least one of the one or more power receiving apparatuses does not have the function, overvoltage is not applied to the power receiving apparatus that does not have the function.

Abstract: A power receiving apparatus, that complies with at least two power transfer methods and receives power wirelessly from a power transmitting apparatus, detects unexpected power which is not power transmitted from the power transmitting apparatus while a first power transfer method is used out of the at least two power transfer methods. When the unexpected power is detected, the power receiving apparatus controls the power transmitting apparatus and the power receiving apparatus so that a second power transfer method which is different from the first power transfer method out of the at least two power transfer methods is used.

Abstract: A power transmitting apparatus that transmits power to a power receiving apparatus executes intermittent wireless transmission of power. The power transmitting apparatus operates according to one of a first power transmitting method including detecting a signal load-modulated by the power receiving apparatus using an ID in response to the transmitted power during the intermittent transmission and a second power transmitting method including transmitting the power having modulated the power according to an ID determined in advance so that the power receiving apparatus detects the ID determined in advance.

Abstract: A power transmitting apparatus that transmits power to a power receiving apparatus executes intermittent wireless transmission of power. The power transmitting apparatus operates according to one of a first power transmitting method including detecting a signal load-modulated by the power receiving apparatus using an ID in response to the transmitted power during the intermittent transmission and a second power transmitting method including transmitting the power having modulated the power according to an ID determined in advance so that the power receiving apparatus detects the ID determined in advance.