Abstract: Disclosed herein is a contactless power receiving apparatus, including a resonance element adapted to receive supply of AC power in a contactless fashion by resonance from a resonance element of a power supplying source; an excitation element adapted to receive supply of the AC power by electromagnetic induction from the resonance element; a rectification circuit adapted to generate DC power from the AC power from the excitation element and output the DC power; and a changeover circuit adapted to change over the AC power between a supplied state and a non-supplied state to the rectification circuit.

Abstract: An electronic apparatus includes a switch control section configured to: determine whether a received signal is any one of a power signal and a data signal based on the received signal, and select any one of a power-reception operation and a data-transmission operation based on the determination of the received signal.

Abstract: Disclosed herein is a power feeding apparatus, including: a power feeding portion adapted to feed an electric power in a wireless manner; and a storage body storing therein the power feeding portion. The storage body includes a main body, a first storage portion formed within the main body and storing therein the power feeding portion, and at least one second storage portion formed so as to be adapted to store or retrieve a power receiving apparatus as a storage object in or from the main body, the electric power of the power feeding portion stored in the first storage portion being adapted to be fed from the at least one second storage portion. At least a magnetically shielding portion is formed in an outer peripheral portion, and the at least one second storage portion forms a magnetically closed space in a state of being stored in the main body.

Abstract: A detection device includes a coil configured to be electromagnetically coupled with an outside, and a detection section connected to a circuit including the coil. The detection section is configured to measure a Q value of the circuit using an alternating-current signal at a frequency different from a frequency of an alternating-current signal of contactless power feed.

Abstract: Disclosed herein is a wireless power supplying rack, including: a power transmission device adapted to transmit power to be supplied; a repeater device adapted to repeat the transmission power of the power transmission device; a power reception device adapted to receive the power repeated by the repeater device; and a main body in which a load to which the power received at least by the power reception device from between the power reception device and the repeater device is supplied is disposed; at least the repeater device and the power reception device from among the power transmission device, repeater device and power reception device being incorporated in the main body; wherein the power transmission device, the repeater device and the reception device have a first resonance element, a second resonance element and a third resonance element, respectively.

Abstract: An electromagnetically-coupled state detection circuit including a detection unit that measures a primary side Q value of a circuit containing a primary side coil electromagnetically coupled with a secondary side coil and power transmission efficiency to the secondary side coil, corrects the power transmission efficiency based on the Q value of the primary side coil, and detects a state of electromagnetic coupling with the secondary side coil based on an obtained corrected value of the power transmission efficiency.

Abstract: A feed unit includes: a power transmission coil provided to perform power transmission with use of a magnetic field; a parallel LC resonance circuit including the power transmission coil; a series LC resonance circuit; an alternating-current signal generating section supplying the parallel LC resonance circuit and the series LC resonance circuit with an alternating-current signal used to perform the power transmission; and a control section controlling the alternating-current signal generating section with use of a predetermined control signal, the control section performing frequency control of the control signal to allow a circuit current that flows upon the power transmission to become smaller.

Abstract: A contactless power supply for charging at least one device using magnetic field resonance includes an AC power supply, at least one circuit, a charging surface and at least one indicator to indicate a charging priority relative to the charging surface according to magnetic field strength. Devices placed near a region of the charging surface indicated as having a high priority by the indicators will charge more rapidly than an external device placed near a region of the charging surface indicated by the indicators as having a lower charging priority. Indication of the charging priority regions on the charging surface may be indicated by differing materials, patterns, shapes or offsets. In addition, the contactless power supply may have more than one region of high charging priority.

Abstract: There is provided a sensing device including a circuit including at least a coil electromagnetically coupled to an outside; a temperature detection unit for detecting a temperature of the coil; a sensing unit for measuring a Q value of the circuit; and a correction unit for correcting the Q value measured by the sensing unit based on temperature information detected by the temperature detection unit.

Abstract: A contactless power supply for charging at least one device using magnetic field resonance includes an AC power supply, at least one circuit, a charging surface and at least one indicator to indicate a charging priority relative to the charging surface according to magnetic field strength. Devices placed near a region of the charging surface indicated as having a high priority by the indicators will charge more rapidly than an external device placed near a region of the charging surface indicated by the indicators as having a lower charging priority. Indication of the charging priority regions on the charging surface may be indicated by differing materials, patterns, shapes or offsets. In addition, the contactless power supply may have more than one region of high charging priority.

Abstract: The present disclosure provides an electronic component, including, a coil, and a circuit portion having a grounding terminal and a hot terminal and connected to the coil, wherein the grounding terminal of the circuit portion is connected to one end side of the coil, and the hot terminal of the circuit portion is connected to the other end side of the coil, thereby integrating the circuit portion with the coil.

Abstract: Disclosed herein is a power feeding apparatus, including: a power feeding portion adapted to feed an electric power in a wireless manner; and a storage body storing therein the power feeding portion. The storage body includes a main body, a first storage portion formed within the main body and storing therein the power feeding portion, and at least one second storage portion formed so as to be adapted to store or retrieve a power receiving apparatus as a storage object in or from the main body, the electric power of the power feeding portion stored in the first storage portion being adapted to be fed from the at least one second storage portion. At least a magnetically shielding portion is formed in an outer peripheral portion, and the at least one second storage portion forms a magnetically closed space in a state of being stored in the main body.

Abstract: A power feeding apparatus, power receiving apparatus, wireless power feeding system, and method for wireless transfer of power are provided. The power feeding apparatus includes an impedance detector, a controller, a power transmitter, a variable matching circuit, and a signal transmitter. The controller is configured to provide first control information and second control information based on an impedance detected by the impedance detector. The power feeding apparatus' variable matching circuit is configured to change a variable diameter of a power feeding coil according to the first control information. The power receiving apparatus includes a power receiver, a signal receiver, and a variable matching circuit. The power receiving apparatus' variable matching circuit is configured to change a variable diameter of a power feeding coil according to the second control information provided by the power feeding apparatus.

Abstract: Disclosed herein is a wireless power supplying rack, including: a power transmission device adapted to transmit power to be supplied; a repeater device adapted to repeat the transmission power of the power transmission device; a power reception device adapted to receive the power repeated by the repeater device; and a main body in which a load to which the power received at least by the power reception device from between the power reception device and the repeater device is supplied is disposed; at least the repeater device and the power reception device from among the power transmission device, repeater device and power reception device being incorporated in the main body; wherein the power transmission device, the repeater device and the reception device have a first resonance element, a second resonance element and a third resonance element, respectively.

Abstract: Disclosed herein is a power feeding device including a power transmitter adapted to generate a plurality of transmission signals at different frequencies including at least power to be fed; a power feeding element that is fed with transmission signals including power generated by the power transmitter; and a plurality of resonance elements that have different resonance frequencies and are provided where they can be coupled with the power feeding element by electromagnetic induction.

Abstract: A power feed device includes: a power generator configured to generate power that should be fed; a power feed element configured to be formed of a coil fed with power generated by the power generator; a resonance element configured to be coupled to the power feed element by electromagnetic induction; and a variable matching unit configured to include a function for impedance matching at a point of feed of the power to the power feed element, wherein a diameter of the power feed element is changeable, and the variable matching unit is capable of changing the diameter of the power feed element.

Abstract: A contactless power supplying communication apparatus includes: a resonance element adapted to supply alternating current power to one or more electronic apparatus by resonance; an alternating current power supply section adapted to generate alternating current power of a frequency in accordance with a resonance frequency of the resonance element and supply the generated alternating current power to the resonance element; a communication section adapted to carry out a communication process through the resonance element; and a switching section provided between the resonance element and the communication section and adapted to cut off connection between the resonance element and the communication section upon power supply but establish connection between the resonance element and the communication section upon communication.

Abstract: A contactless power supply for charging at least one device using magnetic field resonance includes an AC power supply, at least one circuit, a charging surface and at least one indicator to indicate a charging priority relative to the charging surface according to magnetic field strength. Devices placed near a region of the charging surface indicated as having a high priority by the indicators will charge more rapidly than an external device placed near a region of the charging surface indicated by the indicators as having a lower charging priority. Indication of the charging priority regions on the charging surface may be indicated by differing materials, patterns, shapes or offsets. In addition, the contactless power supply may have more than one region of high charging priority.

Abstract: Disclosed herein is a contactless power receiving apparatus, including a resonance element adapted to receive supply of AC power in a contactless fashion by resonance from a resonance element of a power supplying source; an excitation element adapted to receive supply of the AC power by electromagnetic induction from the resonance element; a rectification circuit adapted to generate DC power from the AC power from the excitation element and output the DC power; and a changeover circuit adapted to change over the AC power between a supplied state and a non-supplied state to the rectification circuit.

Abstract: A thinner portable wireless telephone with a thinner built-in antenna. An antenna unit is composed of a first radiating conductor and a second radiating conductor. The second radiating conductor having about half electrical length of the first radiating conductor is arranged so as to correspond the first radiating conductor from its center to one end in parallel. In addition, one ends of the first and second radiating conductors are electrically connected and power is supplied to around the center of the first radiating conductor and the other end of the second radiating conductor. Only electric current flowing on the external surfaces of the antenna unit causes radio waves. As a result, the space between the first and second radiating conductors can be narrowed, thus making it possible to construct a thinner antenna unit. Thus a portable wireless apparatus can be made thinner.