Nitto-denko Corporation

K/s Himpp

Hisashi Tsuda

Takezo Hatanaka

Masami Inoue

Taiki Sueyoshi

Nam Tung Vu

Takashi Oda

Hiroshi Yamazaki

Yutaka Ohmori

Shigenori Morita

Hiromoto Haruta

Hajime Nishio

Takahiro Nakai

Toru Mizutani

Motoko Kawasaki

Daigo Tsubai

Kaoru Ito

Yasuyuki Ota

Hideshi Yamakawa

A portable device including a secondary battery, a plurality of driving components driven by charged power of the secondary battery, a charging unit configured to charge the secondary battery by an input of outside power supplied from outside of the portable device, a plurality of transformation units each configured to output the charged power of the secondary battery at a driving voltage of a corresponding one of the plurality of driving components, a detection unit configured to detect the input of the outside power to the charging unit, and a switching controller configured to switch a state of one of the plurality of transformation units from an operation state to a stopped state responsive to detecting the input of the outside power to the charging unit causing only the corresponding one of the plurality of driving components to stop operation during charging of the secondary battery.

Portable device, charging system, and power source circuit substrate

A wireless power transmission system includes a power-supplying device including an electronic oscillator that generates electric power having a frequency of 1 MHz or more and 5 MHz or less, and a power-supplying coil member in which the electric power flows; and a power-receiving device including a power-receiving coil member that is capable of generating electric power based on the magnetic field generating from the power-supplying coil member, wherein the power-receiving coil member is a sheet coil including an insulating layer and a first coil pattern disposed at one side of the insulating layer, the first coil pattern is composed of wires, and the wires are disposed in spaced apart relation from each other with a predetermined space provided therebetween in the radial direction of the first coil pattern.

Wireless power transmission system and sheet coil

A wireless power transmission system includes a power transmission device including a plurality of power transmission portions, and a power receiving object including a power receiving portion capable of receiving an electric power wirelessly transmitted from the power transmission portion. Of the plurality of power transmission portions, a specific power transmission portion transmits the electric power to the power receiving portion.

Wireless power transmission system

A variable magnetic field in which a power-supplying coil and a power supplying resonator exist is generated only by the power-supplying coil. Power-supplying coils and each of which generates a variable magnetic field due to the supply of a variable current via a first current path on one coil end a side and a second current path on the other coil end side; resonance capacitors which are provided on the first current path and the second current path; and a power-supplying coil short-circuit mechanism which is able to cause at least one of the power-supplying coils and to function as a power supplying resonator by allowing the end portions and of the first current path and the second current path to short-circuit with each other are provided.

Magnetic field formation device, power supplying device, power receiving device, power receiving/supplying device, portable device, coil device, and magnetic field formation method

A magnetic field which is partially a variable magnetic field with high or low magnetic field strength is formed at a predetermined region. A plurality of coil pieces and generating a variable magnetic field and a power-supplying coil which is provided to generate an induced current for at least one of the coil pieces and are provided, and coil ends of two or more of the coil pieces and are connected to each other.

Magnetic field formation device, power supplying device, power receiving device, power receiving/supplying device, and portable device

A magnetic field is formed at a predetermined region. A magnetic field formation device configured to generate a variable magnetic field at a predetermined region includes power supplying resonators. All of the power supplying resonators are provided so that coil surfaces oppose the predetermined region, and at least one of the power supplying resonators is provided to have a coil surface direction intersecting with the coil surface direction of the other one of the power supplying resonators.

Magnetic field formation device, and power receiving device

A magnetic field is formed at a predetermined region. A magnetic field formation device configured to generate a variable magnetic field at a predetermined region A includes: at least one power supplying resonator configured to generate the variable magnetic field; and power-supplying coils configured to generate an induced current in the at least one power supplying resonator, all of the power-supplying coils and the at least one power supplying resonator being disposed so that coil surfaces oppose the predetermined region A, and at least one of the power-supplying coils being disposed to have a coil surface direction which intersects with coil surface directions of the other power-supplying coils.

A driving device is easily handled at the start and end of charging. A housing cup which includes a bottom surface portion on which at least one driving device including a power-receiving device is placed and a side face portion extending outward from the peripheral edge portion of the bottom surface portion and is formed so that an upper peripheral edge portion of the side face portion is an opening portion, and a magnetic field formation device which is configured to generate a variable magnetic field at a housing region surrounded by the bottom surface portion and the side face portion to allow the power-receiving device to receive power irrespective of the direction and position of the power-receiving device are provided.

Power supplying device and power receiving/supplying device

Frequent replacement of a battery is avoided even if power consumption is large, and the structure is simplified and waterproofness is improved. Furthermore, cost reduction is achieved because driving components are selectable from components with variously different operating voltages. A hearing aid includes a secondary battery having a nominal voltage higher than a nominal voltage of an air battery, driving components driven by power at different voltages supplied from the secondary battery, and a transformation unit configured to output the charging power of the secondary battery at a voltage suitable for driving each driving component.

Hearing aid

A portable device has an outer wall member exposed outside, and a power-receiving module at least a portion of which is arranged along the surface shape of the outer wall member to receive power by way of the resonance phenomenon. The power-receiving module has a power-receiving resonance coil and a power-drawing coil. The portable device creates a space portion with a weak magnetic field at the inner position or the peripheral position of the power receiving module during power feeding using the resonance phenomenon so that an electronic device is arranged in the space.

Portable device, charging device for same, and charging system for portable device

In regard to a hearing aid and a hearing aid charging system, frequent replacement of a battery is avoided even if power consumption is large, and the structure is simplified and waterproofness is improved. A Hearing aid includes a secondary battery having a nominal voltage higher than a nominal voltage of an air battery, a driving component driven by power supplied from the secondary battery, and a transformation unit configured to output the charging power of the secondary battery at a voltage suitable for driving the driving component.

Hearing aid and hearing-aid charging system

A wireless power transmission device supplies power by means of a resonance phenomenon, from a power supply module equipped with at least a power-supply resonator to a power-receiving module equipped with at least a power-receiving resonator. For the power-supply resonator and the power-receiving resonator, a value for a transmission characteristic of a power source frequency for power is set so as to have two peak bands, and By setting the power source frequency for the power supplied to the power supply module to the power source frequency band corresponding to one of the two peak bands of the transmission characteristic, magnetic field spaces having a magnetic field strength less than the surrounding magnetic field strength are formed in the area near the power-supply resonator and the power-receiving resonator.

Wireless power transmission device capable of forming magnetic field space, and magnetic field space formation method

A portable device is arranged to include a secondary battery, a driving component driven by charged power of the secondary battery, a charging unit configured to charge the secondary battery by outside power, a transformation unit (processing unit) configured to output the charged power of the secondary battery at a driving voltage of the driving component, a detection unit configured to detect the input of the outside power to the charging unit, and a switching controller configured to switch the state of the transformation unit from an operation state to a stopped state only when the input of the outside power to the charging unit is detected by the detection unit.

A wireless power transmission apparatus which is charged in a short charging time and prevents the shortening of the life of a secondary battery is provided. A wireless power transmission apparatus includes a current-voltage detector configured to measure an input impedance Zin of the wireless power transmission apparatus including the power-supplied device and a control device configured to determine whether a constant current charging period (CC) is finished by utilizing a change in the input impedance Zin measured by the current-voltage detector and terminate the charging of the lithium ion secondary battery when it is determined that the constant current charging period (CC) is finished.

Growing community of inventors

Ibaraki, Japan

Hisashi Tsuda