Abstract: Provided is a power transmission device that has a simple structure and suppresses magnetic field leakage from a power transmission coil while suppressing excessive increase in the outer shape and the weight of the power transmission device. A power transmission device 1 includes: a power transmission portion 2 including a power transmission coil 20 and a housing 3 made of metal and having a peripheral wall 30 surrounding the power transmission portion 2. A shielding portion 5 protruding inward of the peripheral wall 30 is integrated with, of the peripheral wall 30, a top end 30t located on a power reception coil 90 placement side.

Abstract: To realize a vertical type wireless charging device capable of detecting a metal foreign object. The wireless charging device comprises a holder, a power transmission coil, a thermal sensor, a controller, and a warning device. The power transmission coil is disposed outside the side part of the holder. The thermal sensor is disposed at the bottom part of the holder. When the temperature rising rate is not less than 20° C. per five minutes, the controller judges that a metal foreign object exists between the power transmission coil and the electronic device, and the foreign object generates unusual heat. The controller stops wireless charging from the power transmission coil to the electronic device. The controller starts the warning device to alert the user that a foreign object is mixed in the holder and generates unusual heat.

Abstract: A wireless power feeder includes a power feeding circuit, two or more power receiving circuits, and an electromagnetic field coupling circuit. Each power receiving circuit includes a resonant circuit having a load, a power receiving coil, and a capacitor connected in series to each other. The power feeding circuit includes a resonant circuit having a power feeding coil and a capacitor connected in series to the power feeding coil. The power feeding coil includes surrounding portions equal in number to the power receiving coils. The surrounding portions are disposed such that one surrounding portion surrounds one power receiving coil. Adjacent surrounding portions are connected to each other.

Abstract: To realize a vertical type wireless charging device capable of detecting a metal foreign object. The wireless charging device comprises a holder, a power transmission coil, a thermal sensor, a controller, and a warning device. The power transmission coil is disposed outside the side part of the holder. The thermal sensor is disposed at the bottom part of the holder. When the temperature rising rate is not less than 20° C. per five minutes, the controller judges that a metal foreign object exists between the power transmission coil and the electronic device, and the foreign object generates unusual heat. The controller stops wireless charging from the power transmission coil to the electronic device. The controller starts the warning device to alert the user that a foreign object is mixed in the holder and generates unusual heat.

Abstract: A wireless power feeder includes a power feeding circuit, two or more power receiving circuits, and an electromagnetic field coupling circuit. Each power receiving circuit includes a resonant circuit having a load, a power receiving coil, and a capacitor connected in series to each other. The power feeding circuit includes a resonant circuit having a power feeding coil and a capacitor connected in series to the power feeding coil. The power feeding coil includes surrounding portions equal in number to the power receiving coils. The surrounding portions are disposed such that one surrounding portion surrounds one power receiving coil. Adjacent surrounding portions are connected to each other.

Abstract: A light emitting display device, which is applied to a vehicle provided with an airbag device having an airbag accommodated in a folded state and an airbag cover with a shape of covering a vehicle interior of the airbag, the light emitting display device includes: a light emitting display part provided to the airbag cover, the light emitting display part configured to emit light using supplied power; a power feeding device including a power reception coil and a power transmission coil, the power feeding device configured to supply power to the light emitting display part in a non-contact manner, wherein: the power reception coil is provided to the airbag cover in a state of being integrated with the light emitting display part; and the power transmission coil is arranged at a position out of a range, in which the airbag is deployed, when the airbag device is operated.

Abstract: Provided is a console box that realizes power feeding to a power receiving device (that allows a power receiving device to receive power). A console box 1 of the present invention includes: a box body 2 having a bottom portion 20, and a tubular wall portion 21 standing from a surface of the bottom portion 20; and a coil 3 provided at the box body 2, implemented by a conductive wire 30 wound along a peripheral direction of the wall portion 21, and forming an electromagnetic resonance field when being energized according to a predetermined condition. In the console box 1 of the present invention, power feeding of a resonance type is performed, and thus, wireless power feeding is realized in a console box where, in the case of a conventional electromagnetic-induction-type wireless power feeding, a power feeding device is difficult to be installed.

Abstract: A light emitting display device, which is applied to a vehicle provided with an airbag device having an airbag accommodated in a folded state and an airbag cover with a shape of covering a vehicle interior of the airbag, the light emitting display device includes: a light emitting display part provided to the airbag cover, the light emitting display part configured to emit light using supplied power; a power feeding device including a power reception coil and a power transmission coil, the power feeding device configured to supply power to the light emitting display part in a non-contact manner, wherein: the power reception coil is provided to the airbag cover in a state of being integrated with the light emitting display part; and the power transmission coil is arranged at a position out of a range, in which the airbag is deployed, when the airbag device is operated.

Abstract: The present invention provides a Group III nitride semiconductor light-emitting device which attains suitable light extraction to the outside by reflecting the light directed from a substrate to a semiconductor layer toward the substrate, and a production method therefor. The light-emitting device comprises a substrate, a buffer layer, an n-type semiconductor layer, a light-emitting layer, a p-type semiconductor layer, and a plurality of dielectric multilayer films. The dielectric multilayer films are disposed on the first surface of the substrate. The first surface of the substrate has at least a bottom surface. The buffer layer is formed on at least a part of the bottom surface. The dielectric multilayer films have inclined planes inclined to the bottom surface. The n-type semiconductor layer is formed on the buffer layer and the inclined planes of the dielectric multilayer films.

Abstract: A method of manufacturing a group-III nitride semiconductor light emitting element includes a first irregularity shape part forming process of sequentially forming an n-type semiconductor layer, a light emitting layer and a p-type semiconductor layer on an irregularity substrate to make a laminated body and forming a first irregularity shape part on the n-type semiconductor layer, a first irregularity shape part exposing process of separating the irregularity substrate from the laminated body to expose the first irregularity shape part of the n-type semiconductor layer, and a second irregularity shape part forming process of roughening a surface of the first irregularity shape part of the n-type semiconductor layer to form a second irregularity shape part having fine irregularity on the first irregularity shape part.