Provided is a power transmission system that can prevent a plunge in power transmission efficiency even when there is a positional shift of a power reception antenna with respect to a power transmission antenna. A power transmission system 100 of the present invention is characterized by including: a power transmission antenna 105 that includes a wound power transmission coil that is placed on the ground; and a power reception antenna 201 that is disposed in such a way as to face the power transmission antenna 105 , includes a wound power reception coil, and receives electric energy from the power transmission antenna 105 via an electromagnetic field, wherein an area (S 1 ) of a first projection plane that is formed by the power transmission coil in a vertical direction with respect to a horizontal plane is larger than an area (S 2 ) of a second projection plane that is formed by the power reception coil in the vertical direction with respect to the horizontal plane.

Power transmission system

A wireless power transfer system includes a power receiver (105) and a power transmitter (101) generating a wireless inductive power transfer signal for powering the power receiver (105) during a power transfer phase. An apparatus, often the power transmitter (101) comprises a first communication unit (305) communicating with a second communication unit of an entity using an electromagnetic communication signal. The entity may typically be the power receiver (105). The apparatus comprises a reference processor (307) for measuring and storing a reference value of a characteristic of the communication signal and a measurement unit (309) which repeatedly during the power transfer phase determines a measured value of the characteristic. A comparator (311) compares the measured values to the reference value and an initiator (313) triggers an entity detection process if the comparison indicates that a measured value and the reference value do not meet a similarity criterion. The entity detection process detect a presence of another entity.

Wireless inductive power transfer

The invention relates to a single device (500) combining the functions of an inductive power transmitter for recharging a mobile device and of near-field data communication (NFC) with said mobile device. Said device comprises at least the following elements: a) an inductive power transmission module (500) for transmitting power to a mobile device (600), including: a power transmission coil (110); a first device (120) for communicating between the power transmission module and the mobile device; and a device (130) for monitoring the charge of the mobile device; b) a second near-field communication device including: a data transmission coil (310); a second device (320) for communicating between the data transmission module and the mobile device; and a device (330) for controlling the exchanges of information with the mobile device; and c) a base (502) for receiving the mobile device.

inductive power transmission device

There is provided a power supply receiver-transmitter device, a wireless power supply receiver, and a wireless power supply transmitter which allow wireless power supply transmission and wireless data transmission and reception, and improve the usability thereof. The wireless power supply receiver-transmitter device includes: a wireless power supply receiver (PR) including a power receiver unit (RU) and a first data transmitter/receiver unit (DRU); a wireless power supply transmitter (PT) including a power transmitter unit (TU); and a second data transmitter/receiver unit (DTU). The wireless power supply receiver (PR) wirelessly receives electric power transmitted from the wireless power supply transmitter (PT), and the first data transmitter/receiver unit (DRU) bidirectionally transmits and receives data to/from the second data transmitter/receiver units (DTU) through optical communications.

Wireless power supply receiver-transmitter device, wireless power supply receiver and wireless power supply transmitter

PROBLEM TO BE SOLVED: To provide a low-cost noncontact charging system capable of authenticating that a combination of a power transmission side and a power reception side is normal, and efficiently transmitting power from the power transmission side to the power reception side. SOLUTION: A charging apparatus 1 includes a power transmission planar coil L1 for transmitting charging high-frequency power, and a charged apparatus 2 includes a power reception planar coil which is magnetically coupled with the power transmission coil L1 and receives the charging high-frequency power. The charging apparatus 1 includes a planar coil L3 for authentication of primary side, which transmits high-frequency power for authenticating the charged apparatus and receives a high-frequency signal for authenticating the charged apparatus, and the charged apparatus 2 includes a planar coil L4 for authenticating a secondary side, which is magnetically coupled to the coil L3, receives the high-frequency power for authentication and outputs a high-frequency signal for authentication generated from the high-frequency power for authentication to the coil L3. The coils for authentication are each arranged so as to oppose a plane different from a plane facing a gap G, out of both surfaces of the power transmission coil L1 or the power reception coil L2. COPYRIGHT: (C)2011,JPO&INPIT

Noncontact charging system

Wireless power supply and information communication are achieved between electronic circuit substrates in the electronic equipment, and the size of the circuitry for achieving the above is reduced. There are provided a first electronic circuit substrate, a second electronic circuit substrate, a first coil connected to the first electronic circuit substrate, and a second coil connected to the second electronic circuit substrate. Power is transmitted from the first coil to the second coil by electromagnetic induction so that the first electronic circuit substrate and the second electronic circuit substrate are electrically connected.

Electronic equipment and method for connecting electronic circuit substrate

PROBLEM TO BE SOLVED: To execute wireless power supply and wireless information communication between electronic circuit boards in an electronic device, and to reduce the size of means for achieving the wireless power supply and the wireless information communication. SOLUTION: The electronic device includes a first electronic circuit board 2, a second electronic circuit board 4, a first coil 3a connected to the first electronic circuit board 2, and a second coil 3b connected to the second electronic circuit board 4. Power is fed from the first coil 3a to the second coil 3b by electromagnetic induction so as to electrically connect between the first electronic circuit board 2 and the second electronic circuit board 4. COPYRIGHT: (C)2010,JPO&INPIT

Electronic device and method for connecting electronic circuit board

Provided is a device state detecting device hardly requiring a liver to learn a combination of the operating states of all the devices at home and producing few estimation errors even if an unknown device operates. The device state detecting device includes a measuring means (110) for measuring physical quantities of the environment where devices are placed, a feature value calculating means (120) for calculating the feature values of the values measured by the measuring means (110), a storage means (140) for previously storing the feature values of the respective devices and the device states corresponding to the feature values as a reference device entry dictionary (200), and a device state detecting means (130) for searching the reference device entry dictionary (200) for a stored feature value by using the feature value calculated by the feature value calculating means (120) as a search key, and for detecting the device state according to the device state corresponding to the feature value searched for.

Device state detecting device, device state detecting method, device state detecting server, device state detecting system, liver abnormality detecting device, liver abnormality detecting system, liver abnormality detecting method, and device state database maintaining server

PROBLEM TO BE SOLVED: To facilitate setting and diagnosis of an electronic device, while preventing leakage of information, without causing increase in power consumption, cost and processing load, and without causing device to be enlarged. SOLUTION: A power supply circuit 32 converts an AC voltage supplied from an external power supply 35 into a DC voltage. A power-receiving coil 22 receives power externally through electromagnetic induction coupling. A power-receiving circuit 23 receives AC power which is supplied via the power-receiving coil 22 and converts the AC power received into DC power. A transceiver coil 24 transmits/receives data to/from the outside by electromagnetic induction coupling. A transmitting circuit 25 and a receiving circuit 26 transmit/receive data via the transceiver coil 24. A memory 29 stores the data to be transmitted/received. The power from the power supply circuit 32 is supplied to a main function 31, the transmitting circuit 25, the receiving circuit 26, a control unit 27 and the memory 29. The power from the power-receiving circuit 23 is supplied to the transmitting circuit 25, the receiving circuit 26, the control unit 27 and the memory 29. COPYRIGHT: (C)2011,JPO&INPIT

Electronic device, setting diagnostic device, setting diagnostic system, air conditioner, sensor device, measuring instrument and electrical apparatus

PROBLEM TO BE SOLVED: To obtain a non-contact power receiving and supplying apparatus, capable of supplying power from a power supply device to a power receiver, even if there is a certain error in the position of the power receiver to the power supply device, and to provide the power receiver and the power supply device. SOLUTION: This non-contact power receiving and supplying apparatus includes the power supply device 4 which has a plurality of power supply coils 2 and supplies the power supply coils 2 with AC currents, and the power receiver 3 which has a power receiving coil 1 and receives power from the power supply device 4 by electromagnetic induction, and the power supply device 4 selects the power supply coil 2 capable of supplying the power receiver 3 with power from among the plurality of power supply coils 2, and supplies the power receiving coil 2 with an AC current. COPYRIGHT: (C)2010,JPO&INPIT

Higuma Toshiyasu

Papers

Electronic equipment and method for connecting electronic circuit substrate

Electronic device and method for connecting electronic circuit board

Device state detecting device, device state detecting method, device state detecting server, device state detecting system, liver abnormality detecting device, liver abnormality detecting system, liver abnormality detecting method, and device state database maintaining server

Electronic device, setting diagnostic device, setting diagnostic system, air conditioner, sensor device, measuring instrument and electrical apparatus

Non-contact power receiving and supplying apparatus, power receiver, and power supply device