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# 6578 results about "Electromagnetic induction" patented technology

Electromagnetic or magnetic induction is the production of an electromotive force (i.e., voltage) across an electrical conductor in a changing magnetic field. Michael Faraday is generally credited with the discovery of induction in 1831, and James Clerk Maxwell mathematically described it as Faraday's law of induction. Lenz's law describes the direction of the induced field. Faraday's law was later generalized to become the Maxwell–Faraday equation, one of the four Maxwell equations in his theory of electromagnetism.

## Non-contact power transmission device

An electromagnetic resonance non-contact power transmission device includes a transmitter including a transmitter resonance element having a mechanism for discretely or continuously varying a resonant frequency, a transmitter excitation element coupled to the transmitter resonance element by electromagnetic induction, and an alternating current source for applying an alternating current at the same frequency as the resonant frequency to the transmitter excitation element, and a plurality of receivers each including a receiver resonance element having a specific resonant frequency, a receiver excitation element coupled to the receiver resonance element by electromagnetic induction, and an output circuit for outputting an electric current induced by the receiver excitation element. Electric power is transmitted selectively from the transmitter to any of the receivers having different specific resonant frequencies by changing the resonant frequency of the transmitter.
Owner:SONY CORP

## Tissue remover and method

An electromagnetically induced cutting mechanism provides accurate cutting operations on soft tissues. The electromagnetically induced cutter is adapted to interact with atomized fluid particles. A tissue remover comprises an aspiration cannula housing a fluid and energy guide for conducting electromagnetically induced cutting forces to the site within a patient's body for aspiration of soft tissue. The cannula is provided with a cannula distal end. The proximal end of the cannula is provided with fluid flow connection to an aspiration source. Separated soft tissue and fluid are aspirated through the cannula distal end and the cannula by an aspiration source at the proximal end of the cannula.
Owner:BIOLASE TECH INC

## Ultrasonic spindle system

It is possible to stably supply an electric signal to an ultrasonic generation element without causing friction or damage on parts or without requiring periodical parts exchange. A reception coil (11) connected to a vibrator (6) is wound on the outer circumference of a housing (1) constituting a shaft (30) of a machining spindle (101). The reception coil (11) is surrounded coaxially by a transmission coil (12) at an appropriate interval. A predetermined electric signal outputted from an ultrasonic drive device (21) for driving the vibrator (6) is applied to the transmission coil (12). The predetermined electric signal may be applied to the vibrator (6) via the reception coil (11) by electromagnetic induction between the transmission coil (12) and the reception coil (11).
Owner:KUBOTA OSAMU +2

## Induced power transmission circuit

To provide an induced power transmission circuit that transmits, from a transmission antenna (1) connected to a power supply circuit, an AC power having an angular frequency ω to a spaced reception antenna (2) with an excellent efficiency, thereby transmitting it to a load circuit. The induced power transmission circuit comprises a circuit the two ends of which are coupled by a capacitor (C1) and in which the power supply circuit is connected in series to a midway port (1) (P1) of the transmission antenna (1) having an effective self-inductance L1; and a circuit the two ends of which are coupled by a capacitor (C2) and in which the load circuit is connected in series to a midway port (2) (P2) of the reception antenna (2) having an effective self-inductance L2; wherein for a coupling coefficient k of the electromagnetic induction between the antennas and for a phase angle β having an arbitrary value, the angular frequency ω is set to the square root of the reciprocal of a value of L2×C2×(1+k*cos (β)), the output impedance of the power supply circuit is set to approximately kωL1*sin (β), and the input impedance of the load circuit is set to approximately kωL2*sin (β). There is also provided an impedance converting circuit that converts the circuit impedances.
Owner:KIKUCHI HIDEO

## Noncontact Electric Power Transmission System

Disclosed is a noncontact electric power transmission system having a power transmitter circuit section 10 and a power receiver circuit section 30 which are adapted to be coupled to transmit electric power from a transmitter coil Lp provided in the power transmitter circuit section 10 to a receiver coil Ls provided in the power receiver circuit section 30, in a noncontact manner by means of electromagnetic induction. The noncontact electric power transmission system comprises: a separately-excited or self-excited switching circuit 2 provided in the power transmitter circuit section 10; a control IC 3 operable to drive the switching circuit 2; an LC series resonant circuit including a capacitor Cp connected in series to the transmitter coil Lp or an LC parallel resonant circuit including a capacitor Cp connected in parallel to the transmitter coil Lp; and an LC parallel resonant circuit including a capacitor Cs connected in parallel to the receiver coil Ls, wherein an oscillating frequency (Fosc) of the control IC 3, a resonant frequency (Fpr) of the LC series resonant circuit or the LC parallel resonant circuit in the power transmitter circuit section 10, and a resonant frequency (Fsr) of the LC parallel resonant circuit in the power receiver circuit section 30, have the following relationship: Fpr<Fosc<Fsr.
Owner:MURATA MFG CO LTD

## System for electrical power supply and for transmitting data without electrical contact

The invention relates to an assembly comprising a power transmitter (E) and a power receiver (R) respectively comprising a primary coil (11) and a secondary coil (22), in which the transmitter and the receiver are of the electromagnetic induction type and allow on the one hand the powering without electrical contact of the receiver by the transmitter, and on the other hand a bidirectional communication without electrical contact between the transmitter and the receiver.
Owner:DELACHAUX

## Digitizer function-equipped liquid crystal display device information processing electronic device, and game device

Provided is a digitizer function-equipped liquid crystal display device capable of preventing the wire shadows of a loop antenna from being projected on a liquid crystal panel and capable of being applied to a large size liquid crystal panel. It is also possible to provide an information processing electronic device and a game device provided with the digitizer function-equipped liquid crystal display device. Here, the digitizer function-equipped liquid crystal display device includes: a liquid crystal panel 1; a light diffusion member 2 which is disposed between the liquid crystal panel 1 and a backlight 5 irradiating the liquid crystal panel 1 with light; an electromagnetic induction type loop antenna which is disposed at a portion apart from the light diffusion member 2 in the direction toward the backlight 5 by a predetermined spacing so as to detect a position on the plane of the liquid crystal panel 1 in one coordinate axis direction and another coordinate axis direction that intersects the one coordinate axis direction; and a spacing retaining means for retaining the spacing between the light diffusion member 2 and loop antenna at a predetermined spacing value. As the spacing retaining means, a first light transmitting member 3 formed of a plate material having a light transmitting property is used.
Owner:SEGA CORP

## Voltage regulating devices in LED lamps with multiple power sources

LED driver circuits containing voltage reducing devices, voltage regulating devices, and voltage converting devices are disclosed as the main components to provide power to LEDs. The LED driver circuits are designed to work with a ballast, mains alternating current voltage, direct current voltage, and electromagnetic induction power. The voltage regulating devices can be a resistor in series with at least one zener diode or a voltage regulator both in parallel with and providing power to the LEDs. The LEDs can also be anti-parallel diode pairs consisting of one diode and one LED or two LEDs, or the LEDs can be anti-parallel diode string pairs consisting of diodes and LEDs or all LEDs. The LED driver circuits will be incorporated into LED replacement lamps, and in particular to LED lamps to replace fluorescent lamps for use with existing ballasts and other power sources where the ballast may be removed or bypassed.
Owner:DENOVO LIGHTING

## Method of manufacturing a semiconductor device

The present invention supplies a manufacturing method of a semiconductor device, which includes a non-contact inspection process capable of confirming if a circuit or circuit element formed on an array substrate is normally performed and can decrease a manufacturing cost by eliminating wastes to keep a defective product forming.An electromotive force generated by electromagnetic induction is rectified and shaped by using primary coils formed on a check substrate and secondary coils formed on an array substrate, whereby a power source voltage and a driving signal are supplied to circuits or circuit elements on a TFT substrate so as to be driven.
Owner:SEMICON ENERGY LAB CO LTD

## Method of forming an electromagnetic sensing coil in a medical instrument

A surgical navigation system for navigating a region of a patient includes a non-invasive dynamic reference frame and / or fiducial marker, sensor tipped instruments, and isolator circuits. The dynamic reference frame may be repeatably placed on the patient in a precise location for guiding the instruments. The instruments may be precisely guided by positioning sensors near moveable portions of the instruments. Electrical sources may be electrically isolated from the patient.

## Non-contact power supply system

A non-contact power supply system includes a power supply device for transmitting high frequency power and a load device which receives the high frequency power in a non-contact mode by electromagnetic induction to supply it to a load. The power supply device includes a power transmission unit having a primary power coil and an inverter circuit, an inquiry unit having at least one primary signal coil and an oscillation circuit, a signal detection unit and a control unit. The load device includes a power reception unit having a secondary power coil magnetically coupled to the primary power coil and a power conversion unit, a secondary signal coil magnetically coupled to the primary signal coil, and a response unit which is operated by electromotive force induced in the secondary signal coil. The control unit stops power transmission when no signal is detected and executes power transmission which a signal is detected.
Owner:KONINKLJIJKE PHILIPS NV

## Electronic cigarette

The invention discloses an electronic cigarette which comprises a cigarette-like shell with a hollow cavity, an electrical source, a cigarette pellet and cigarette rod fittings. The electrical source, a pneumatic switch, a magnetostrictive vibrator and an electromagnetic induction heater are arranged in sequence inside the shell from the front end to the back end; wherein, a high frequency generator is respectively connected with the magnetostrictive vibrator, the electromagnetic induction heater and the pneumatic switch through leads. A light-emitting diode is arranged at the front end of the shell and is respectively connected with the pneumatic switch and the electric source through leads. The back end of the shell is connected with the cigarette pellet in which a tobacco solution chamber is arranged.
Owner:BEIJING SHUIWUTANG TECH & TRADE CO LTD

## Mobile communication device with charging module

A mobile communication device includes a battery controller and an inductive charger. The battery control is adapted for electrically connecting to a rechargeable battery of the portable electronic device. The inductive charger includes a power connector adapted for electrically connecting with a power source, and a transmitting inductor electrically coupling with the power connector for generating an electromagnetic induction, wherein the receiving inductor is electrically inducted to the transmitting inductor in a contact free manner for wirelessly transmitting an inductive charging power to the rechargeable battery of the portable electronic device through the transmitting inductor. Therefore, when the rechargeable battery of the portable electronic device is located within an induction distance of the inductive charger, the rechargeable battery of the portable electronic device is automatically charged.
Owner:WANG KEVIN PEICHIH

## Smoke generator and electronic cigarette with same

The invention discloses a smoke generator and an electronic cigarette with the same. The smoke generator comprises a shell and a heating component. The shell is provided with a smoke inlet hole and a smoke outlet hole, and the heating component is arranged in the shell. The shell is further provided with an accommodating area used for storing smoke generating materials. The heating component comprises a metal component and an induction coil wound on the periphery of the metal component. Two ends of the induction coil are connected with an alternating-current power source. The heating component is used for directly heating the smoke generating materials in the accommodating area or permeating from the accommodating area to enable the smoke generating materials to generate smoke which is then exhausted from the smoke outlet hole. Compared with smoke generators with conventional atomizing modes, the smoke generator has the advantages that the smoke generating materials are atomized by a heating mode in which vortexes are generated through electromagnetic induction, so that the smoke generator is large in heating area, full in atomization and the like.
Owner:SHENZHEN FIRST UNION TECH CO LTD

## Tobacco suction system based on electromagnetic heating

The invention discloses a tobacco suction system based on electromagnetic heating. The tobacco suction system is characterized by comprising an end cover (1), a heater (2) and an electromagnetic induction system, wherein the end cover (1) is detachably connected to the heater (2); the end cover (1) comprises a circular cover (11) and a filter tip (13); the heater (2) comprises a shell (21), an inner container (23), a base plate (24) and a cylindrical iron core (25); the electromagnetic induction system comprises an induction coil for heating the inner container (23), the base plate (24) and the cylindrical iron core (25), and a temperature control circuit. By heating the inner container, the base plate and the cylindrical iron core through the electromagnetic induction system, the heating speed can be increased, the heat efficiency is high, and instant heating can be realized, thereby better meeting the requirement of good suction mouthfeel; due to the arrangement of the cylindrical iron core, tobacco products can be heated uniformly and fully, and waste caused by insufficient heating of the tobacco products can be avoided. The tobacco suction system is suitable to be popularized and applied.
Owner:CHINA TOBACCO SICHUAN IND CO LTD +1

## Semiconductor device

The semiconductor device includes a signal processing circuit, an antenna circuit that is connected to the signal processing circuit, and a storage means that supplies electric power to the signal processing circuit. The signal processing circuit receives and transmits information through the antenna circuit, generates a direct current voltage from signals received by the antenna circuit, and stores the direct current voltage in the storage means. Furthermore, the antenna circuit has an antenna portion that receives signals by an electromagnetic induction method and an antenna portion that receives signals by a microwave method so that signals of frequencies from a wide band can be received. Because signals from a wide band can be received, the environment in which the storage means can be charged is widened.
Owner:SEMICON ENERGY LAB CO LTD

## Current detection printed board, voltage detection printed board, current/voltage detection printed board, current/voltage detector, current detector and voltage detector

Owner:DAIHEN CORP

## Electromagnetic Induction Handwriting System and Coordinate Determining Method Thereof

The present invention discloses an electromagnetic induction handwriting system and its single side coordinate determining method for determining a coordinate of a stylus on a handwriting apparatus. The coordinate is computed by a first voltage, a second voltage, and a third voltage, where the first voltage equals the maximum detection voltage, the second voltage and the third voltage are obtained from two antennas, and both of the two antennas are arranged at the same side of the antenna that induces the maximum detection voltage.
Owner:WACOM CO LTD

## Electronic equipment and method for connecting electronic circuit substrate

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.
Owner:MITSUBISHI ELECTRIC CORP

## Transformers and baluns

A transformer includes a primary coil assembly and a secondary coil assembly juxtaposed in a stack and which are electromagnetically inductively coupled and substantially symmetrical to one another. The primary coil assembly includes a plurality of primary coils coplanar with first insulation layers, respectively, and symmetrical to each other, and a first via unit connecting adjacent ones of the primary coils to each other. The secondary coil assembly includes a plurality of secondary coils coplanar with a plurality of second insulation layers, respectively, and symmetrical to each other, and a second via unit connecting adjacent ones of the secondary coils to each other.
Owner:SAMSUNG ELECTRONICS CO LTD

## Electromagnetic energy distributions for electromagnetically induced mechanical cutting

Output optical energy pulses including relatively high energy magnitudes at the beginning of each pulse are disclosed. As a result of the relatively high energy magnitudes which lead each pulse, the leading edge of each pulse includes a relatively large slope. This slope is preferably greater than or equal to 5. Additionally, the full-width half-max value of the output optical energy distributions are between 0.025 and 250 microseconds and, more preferably, are about 70 microseconds. A flashlamp is used to drive the laser system, and a current is used to drive the flashlamp. A flashlamp current generating circuit includes a solid core inductor which has an inductance of 50 microhenries and a capacitor which has a capacitance of 50 microfarads.
Owner:BIOLASE TECH INC

## Fixing device and image forming apparatus

The fixing device using an electromagnetic induction heating (IH) method includes a fixing sleeve having a heating layer, a pressure roller to form a nip while contacting the fixing roller and rotate to drive the fixing sleeve, a temperature detector to detect a temperature on a circumference of the fixing sleeve, and an excitation coil provided near the fixing sleeve and configured to perform induction heating of the heating layer of the fixing sleeve based on the detection result from the temperature detector. The fixing device is configured to change a rotation speed of the fixing sleeve in a standby time during which the fixing sleeve, while rotating, is controlled to be heated so as to maintain a target temperature when a periodic temperature difference occurs on a circumference of the fixing rotary member and having a fluctuation amplitude larger than a predetermined value compared to the target temperature.
Owner:RICOH KK

## Integrated induction battery charge apparatus

An integrated induction battery charge apparatus transforms electric energy and magnetic energy according to electromagnetic induction principle to charge an induction charge battery. It integrates the conventional charge batteries to become an induction charge battery so that users may carry only one charge apparatus to charge the induction batteries of different specifications, thereby improve use convenience.
Owner:INVENTEC CORP

## Magnetic stimulation having a freely selectable pulse shape

ActiveUS20130030239A1Low field energyField strengthElectrotherapyThyristorPulse shapingElectromagnetic induction
Device and method for generating brief strong current pulses in a coil for generating magnetic field pulses which according to the electromagnetic induction principle induce stimulation currents in the body tissue triggering an action potential of the nerve and / or muscle cells, where the coil is positionable close to the body tissue to be stimulated so that its magnetic field passes through the body tissue, and where the device comprises a power generating unit that can generate a freely selectable temporal course of the current through the coil during the current pulse. A method for determining an optimized temporal course of a brief strong current pulse through the coil, where the temporal course of the current pulse is calculated using a method which numerically simulates the electrical behavior of nerve and / or muscle cells and the coil and optimizes the course of the current pulse regarding at least one parameter, or which by means of stimulating the nerve and / or muscle cells with predetermined current pulses optimizes the temporal course of the current pulse regarding at least one parameter and therefrom determines essential parameters of nerve and / or muscle cells.
Owner:TECH UNIV MUNCHEN

## Point-Of-Sale Non-Contact Charging

A point-of-sale non-contact charging system to charge portable electronic devices through their packaging on store shelves makes use of electromagnetic induction so that the integrity of the packaging can be maintained and the products can be freely positioned on store shelves. Since the current can be induced in a conductive coil outside of the portable electronic device, the device need not be modified to be charged through this mechanism.
Owner:KAYE EVAN JOHN

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