Patent application number | Description | Published |
20110241612 | Wireless Charging Set - Provided is a wireless recharging set. A source unit including a source resonator may transmit power wirelessly in all directions, and a device may receive the transmitted wireless power regardless of location. | 10-06-2011 |
20110241613 | WIRELESS POWER RECEIVING APPARATUS INCLUDING A SHIELDING FILM - Provided is a battery pack that includes a resonator to receive power wirelessly. A film, for shielding from a magnetic field that may be generated due to an eddy current, may be inserted between a battery and the resonator of the battery pack. | 10-06-2011 |
20120056487 | POWER CONVERTER IN RESONANCE POWER TRANSMISSION SYSTEM, AND RESONANCE POWER TRANSMISSION APPARATUS - A power converter which may be used in a resonance power transmission system and an apparatus for transmitting a resonance power are provided. According to an aspect, a power converter in a resonance power transmission system may include: an input end configured to receive a direct current (DC) voltage of a predetermined level; a first power converter configured to convert the DC voltage of a predetermined level to an alternating current (AC) signal using a first switching pulse signal having substantially the same frequency as a resonant frequency; a second power converter configured to convert the DC voltage of a predetermined level to an AC signal using a second switching pulse signal having an opposite phase to the first switching pulse signal; a first short circuit configured to reduce or eliminate an odd harmonic of the AC signal outputted from the first power converter, and to provide the AC signal where the odd harmonic is reduced or eliminated to a source resonator; and a second short circuit configured to reduce or eliminate an odd harmonic of the AC signal outputted from the second power converter, and to provide the AC signal where the odd harmonic is reduced or eliminated to the source resonator. | 03-08-2012 |
20120056579 | ROOF TYPE CHARGING APPARATUS USING RESONANT POWER TRANSMISSION - Provided is a roof-type charging apparatus that charges multi-target device, while transmitting a resonance power. A roof-type charging apparatus using resonance power transmission includes a source resonance unit configured to transmit resonance power including a source resonator having a generally planar loop configuration and defining a space therein; a receiving unit configured to receive the resonance power transmitted from the source resonator; and a connecting unit configured to separate the source resonator and the receiving unit by a predetermined distance. | 03-08-2012 |
20120112554 | WIRELESS POWER TRANSMISSION SYSTEM, AND METHOD OF CONTROLLING TRANSMISSION AND RECEPTION OF RESONANCE POWER - A resonance power transmission system, and a method of controlling transmission and reception of a resonance power are provided. According to one embodiment, a method of controlling resonance power transmission in a resonance power transmitter may include: transmitting resonance power to a resonance power receiver, the resonance power having resonance frequencies which vary with respect to a plurality of time intervals; and receiving, from the resonance power receiver, information regarding the resonance frequency having the highest power transmission efficiency among the resonance frequencies used in the time intervals. | 05-10-2012 |
20120153903 | PROTECTOR OF RECTIFIER AND WIRELESS POWER RECEIVER INCLUDING PROTECTOR - A protector that protects a rectifier, and a wireless power receiver including the protector are provided. In one embodiment, a protector for an electronic device may include: a switch configured to control current flow to a rectifier of the electronic device; and a switch controller configured to: compare, with a predetermined threshold value, a voltage difference between an output voltage of the rectifier and a voltage of the electronic device; and transmit a control signal to the switch (i) to discontinue current flow to the rectifier when the voltage difference is greater than the predetermined threshold value, and (ii) to enable current flow to rectifier when the voltage difference is less than or equal to the predetermined threshold value. | 06-21-2012 |
20120155133 | DIRECT CURRENT/ DIRECT CURRENT CONVERTER FOR REDUCING SWITCHING LOSS, WIRELESS POWER RECEIVER INCLUDING DIRECT CURRENT/ DIRECT CURRENT CONVERTER - Provided are a direct current/direct current (DC/DC) converter and a wireless power receiver including the DC/DC converter. In one embodiment, a direct current-direct current (DC/DC) converter for use in a wireless power receiver, the DC/DC converter may include: a voltage converting unit configured to convert, DC voltage, to a predetermined DC voltage; a turn-on switch configured to control current flow of the DC voltage through the voltage converting unit; and a switching controller configured to: detect an amount of current of the voltage converting unit based on a first turn-on period of the turn-on switch, set a second turn-on period of the turn-on switch based on the detected amount of current, and control the turn-on switch based on the second turn-on period. | 06-21-2012 |
20120155134 | HIGH EFFICIENCY RECTIFIER, WIRELESS POWER RECEIVER INCLUDING THE RECTIFIER - A high efficiency rectifier and a wireless power receiver including the rectifier are provided. In one embodiment, a rectifier may be formed of a full bridge diode circuit and may include: a first dual diode, a second dual diode, a third dual diode and a fourth dual diode forming the full bridge diode circuit, the full bridge diode circuit including: a first path configured to output voltage when the phase of an input voltage is positive, via the first dual diode and the fourth dual diode; and a second path configured to output voltage when the phase of the input voltage is negative, via the second dual diode and the third dual diode. In another embodiment, a rectifier may include: at least two full bridge diode circuits connected in parallel. | 06-21-2012 |
20120193996 | APPARATUS AND METHOD FOR WIRELESS POWER TRANSMISSION - A source resonator for wirelessly transmitting power to a target device may include a magnetic field distribution adjusting unit that is configured to adjust the magnetic field generated by the source resonator. In one or more embodiments, the magnetic field distribution adjusting unit may adjust the magnetic field to be substantially uniform in a predetermined vicinity of the source resonator. For example, the magnetic field distribution adjusting unit may adjust the intensity of the magnetic field near the center of the source resonator to be substantially the same as the intensity of the magnetic field near an edge area of the source resonator. | 08-02-2012 |
20120202435 | METHOD AND APPARATUS FOR CONTROLLING WIRELESS POWER TRANSMISSION AND RECEPTION, AND WIRELESS POWER TRANSMISSION SYSTEM - Provided are a transmission system and a wireless power transmission and reception controlling method. According to an embodiment, a wireless power receiver may include: a target communication unit configured to receive, from a wireless power transmitter, a wake-up request signal and synchronization information with respect to wireless power transmission, and to transmit a response signal with respect to the wake-up request signal to the wireless power transmitter; a load path switch configured to activate based on timing information included in the synchronization information; and a target resonator configured to receive wireless power from a source resonator of the wireless power transmitter, when the load path switch is activated. | 08-09-2012 |
20120235507 | APPARATUS AND METHOD FOR HIGH EFFICIENCY VARIABLE POWER TRANSMISSION - A high efficiency variable power transmitting apparatus outputs a variable power by modulating, with respect to a time axis, a high frequency signal having a constant amplitude by turning the high frequency signal ON and OFF, amplifying the variable power to satisfy a requested power level of a target device based on a supply voltage having a predetermined level, converting an alternating current (AC) voltage received from a power source to a direct current (DC) voltage, generating the supply voltage having the predetermined level based on the DC voltage, and providing the supply voltage having the predetermined level to the PA. | 09-20-2012 |
20120286581 | APPARATUS AND METHOD FOR WIRELESS POWER TRANSMISSION - An apparatus and method for controlling a magnetic field when power is wirelessly transmitted are provided. According to one general aspect, a wireless power transmitter may include: a source resonator configured to wirelessly transmit power to a target device including at least one sub-resonator located there within; and a magnetic field distribution controller configured to control the distribution of the magnetic field within the resonator based the resonance frequency of the at least one sub-resonator and the resonance frequency of the source resonator. | 11-15-2012 |
20120293005 | APPARATUS AND METHOD FOR WIRELESS POWER TRANSMISSION - An apparatus and method for efficiently, wirelessly transmitting a power to a plurality of target devices are provided. A wireless power transmitter may include: a source resonator configured to wirelessly transmit energy to a target device with at least one target resonator, the energy being stored in a capacitor; and a feeding unit configured to generate an induced current flowing in the source resonator in the same direction as a direction of an input current flowing in a transmission line, the feeding unit being electrically connected to the capacitor and forming a closed loop with the source resonator. | 11-22-2012 |
20120293006 | APPARATUS AND METHOD FOR USING NEAR FIELD COMMUNICATION AND WIRELESS POWER TRANSMISSION - An apparatus and method of using near field communication (NFC) and wireless power transmission (WPT) are provided. A power receiving apparatus includes a resonator configured to receive a power and to output the power. The power receiving apparatus further includes a near field communication (NFC) receiver configured to perform wireless communication using the power output by the resonator. The power receiving apparatus further includes a wireless power transmission (WPT) receiver configured to supply a voltage using the power output by the resonator. The power receiving apparatus further includes a connecting unit configured to selectively connect the resonator to either the NFC receiver or the WPT receiver. The power receiving apparatus further includes a mode selector configured to control the connecting unit to selectively connect the resonator to either the NFC receiver or the WPT receiver based on the power output by the resonator. | 11-22-2012 |
20120293900 | APPARATUS FOR AND METHOD OF PROTECTING WIRELESS-COUPLED POWER DEVICES FROM OVERVOLTAGE, OVERCURRENT, AND OVERTEMPERATURE USING HYSTERESIS - An overvoltage protecting unit and an overcurrent protecting unit protect a power device from an overvoltage and an overcurrent using a comparator having hysteresis. An overtemperature protecting unit protects the power device from an overtemperature using a thermistor having a resistance that changes as a temperature of the thermistor changes. | 11-22-2012 |
20120294054 | METHOD AND APPARATUS FOR WIRELESS POWER TRANSMISSION USING POWER RECEIVER - A rectifier is provided. The rectifier includes a first rectification unit having an anode connecting to a negative radio frequency (RF) port and a cathode connecting to a positive direct current (DC) port, a second rectification unit having an anode connecting to a positive RF port and a cathode connecting to the positive DC port, a third rectification unit having an anode connecting to a ground and a cathode connecting to the negative RF port, and a fourth rectification unit having an anode connecting to the ground and a cathode connecting to the positive RF port. The first rectification unit includes a plurality of first diodes that are connected in parallel, and the second rectification unit includes a plurality of second diodes that are connected in parallel. | 11-22-2012 |
20120306269 | METHOD AND APPARATUS FOR DETECTING LOAD FLUCTUATION OF WIRELESS POWER TRANSMISSION - A method and apparatus to detect load fluctuation of a wireless power transmission are provided. A wireless power transmitter includes a resonator configured to wirelessly transmit, to a target device, an output power. The wireless power transmitter further includes a power detector configured to detect a current of the output power. The wireless power transmitter further includes a controller configured to detect a change in the current, and to detect a target load based on the change in the current. The target load includes a load of which the output power is applied thereto. | 12-06-2012 |
20120306283 | APPARATUS AND METHOD OF DIVIDING WIRELESS POWER IN WIRELESS RESONANT POWER TRANSMISSION SYSTEM - Provided are methods and apparatuses for distributing wireless power in a wireless power transmission system. According to a general aspect, a source device that distributes a wireless power in a wireless power transmission system may include: a matching circuit searching unit configured to determine information associated with a matching circuit of a source device based on one or more target devices and the amount of power to be distributed to the one or more of the target devices; and a matching circuit modifying unit configured to modify the shape of the matching circuit of the source device to correspond to the determined information associated with the matching circuit of the source device. | 12-06-2012 |
20120306287 | POWER SUPPLY APPARATUS AND METHOD FOR WIRELESS POWER TRANSMISSION - Provided is an apparatus and method that may stably perform wireless transmission. According to one general aspect, a power supply for a wireless power transmitter may include: a detecting unit configured to detect voltage, current, or both supplied to a power amplifier (PA); a controller configured to determine power supplied to the PA based on the detected voltage, the detected current, or both, and to determine a reference current based on the determined power supplied to the PA; and a breaker configured to cut off the power supplied to the PA based on a comparison of current supplied to the PA and the reference current. | 12-06-2012 |
20120306433 | WIRELESS POWER TRANSMISSION AND CHARGING SYSTEM, AND POWER CONTROL METHOD OF WIRELESS POWER TRANSMISSION AND CHARGING SYSTEM - A wireless power transmission and charging system, and a power control method of the wireless power transmission and charging system are provided. The power control method may include generating charging power using the power amplifier. The charging power may be used to charge a target device. The charging power may be transmitted to the target device. The voltage supplied to the power amplifier may be adjusted based on a detected change in the current input to the power amplifier, a detected change in the temperature of the source device, a detected change in the amount of the power received to the target device, or a detected change in the temperature of the target device. | 12-06-2012 |
20120309304 | APPARATUS AND METHOD FOR COMMUNICATION USING WIRELESS POWER - An apparatus and method for communication using a wireless power are provided. The apparatus includes an amplifier configured to amplify an input signal based on a power supplied to the amplifier. The apparatus further includes a control unit configured to detect a change in an impedance of a target device, and to change the power based on the change in the impedance. The apparatus further includes a demodulation unit configured to receive a message from the target device, and to demodulate the message based on the changed power. | 12-06-2012 |
20120309305 | APPARATUS AND METHOD FOR COMMUNICATION USING WIRELESS POWER - An apparatus and method are described that may enable a target device to communicate with a source device using a wireless power. The communication apparatus receives a wireless power from a source resonator through a magnetic coupling between the source resonator and a target resonator. The communication apparatus transmits a message, and modulates the message based on the received wireless power and impedance mismatch between the source device and the target device. The communication apparatus controls the impedance mismatch by changing an impedance of the target device. | 12-06-2012 |
20130101133 | SOUND SYSTEM USING WIRELESS POWER TRANSMISSION - A sound system using wireless power transmission is provided. A power and data transmission apparatus in the sound system, includes a data transmitting unit configured to wirelessly transmit, to a sound output device, sound data. The apparatus further includes a power transmitting unit configured to wirelessly transmit, to the sound output device, power. The apparatus further includes a controller configured to control the data transmitting unit and the power transmitting unit based on a distance between the apparatus and the sound output device. | 04-25-2013 |
20130127256 | WIRELESS POWER TRANSMISSION SYSTEM, AND METHOD OF CONTROLLING POWER IN WIRELESS POWER TRANSMISSION SYSTEM BASED ON DETECTION PARAMETER - A wireless power transmission system, and a method of controlling power in the wireless power transmission system based on a detection parameter are provided. The method includes transmitting a request signal to a device. The method further includes receiving, from the device, a response signal corresponding to the request signal, the response signal including a parameter of the device. The method further includes generating an operation power based on the parameter of the device, the operation power being used for an operation of the device. | 05-23-2013 |
20130130621 | METHOD AND APPARATUS FOR DATA COMMUNICATION IN WIRELESS POWER TRANSMISSION - A method and apparatus for data communication in wireless power transmission are provided. A wireless power transmitter includes a resonance antenna configured to wirelessly transmit a power to a wireless power receiver, and receive a signal from the wireless power receiver, the signal including a sub-carrier. The wireless power transmitter further includes a controller configured to receive the signal from the resonance antenna, and receive data from the wireless power receiver based on the sub-carrier. | 05-23-2013 |
20130134793 | WIRELESS POWER TRANSMISSION SYSTEM AND MULTI-MODE RESONATOR IN WIRELESS POWER TRANSMISSION SYSTEM - A wireless power transmission system and a multi-mode resonator in the wireless power transmission system are provided. The multi-mode resonator includes a transmission line portion including unit-cells, the unit-cells including respective ends connected to each other, and each of the unit-cells including a capacitor, an inductor connected in parallel to the capacitor, and a via. The multi-mode resonator further includes a ground conducting portion configured to provide an electrical ground to the transmission line portion through the via of each of the unit-cells. | 05-30-2013 |
20130134927 | WIRELESS POWER TRANSMISSION SYSTEM BASED ON CELL DIVISION - A wireless power transmission system based on cell division is provided. A communication and power control method of the wireless power transmission system, includes setting a magnetic coupling zone. The method further includes detecting a target device in the magnetic coupling zone. The method further includes transmitting a power to the target device. The method further includes adjusting an amount of the power based on a transmission efficiency of the power. | 05-30-2013 |
20130249306 | WIRELESS POWER TRANSMISSION SYSTEM AND METHOD FOR INCREASING COUPLING EFFICIENCY BY ADJUSTING RESONANT FREQUENCY - A wireless power transmission system and a method for increasing a coupling efficiency by adjusting a resonant frequency are provided. A device of the wireless power transmission system includes a resonator configured to transmit a wireless power, and a communication unit configured to receive information from another device. The device further includes a controller configured to determine a power transmission efficiency based on the information, and adjust a resonant frequency of the device, a resonant frequency of a relay device, and a resonant frequency of the other device, if the power transmission efficiency is less than or equal to a predetermined reference efficiency. | 09-26-2013 |