Patent application number | Description | Published |
20100058568 | MULTI-BAND FILTER MODULE AND METHOD OF FABRICATING THE SAME - A multi-band filter module and a method of fabricating the same are provided. The multi-band filter module includes a piezoelectric substrate, a first filter provided on the piezoelectric substrate, and a second filter provided adjacent to the first filter on the piezoelectric substrate, and operating in a frequency band that is lower than that of the first filter. | 03-11-2010 |
20100110606 | TUNABLE CAPACITOR USING ELECTROWETTING PHENOMENON - A tunable capacitor using an electrowetting phenomenon includes a first electrode; a second electrode which is spaced apart from the first electrode and faces the first electrode; a fluidic channel which is disposed between the first electrode and the second electrode; a first insulating layer which is disposed between the first electrode and the fluidic channel; and a conductive fluid which is disposed in the fluidic channel and moves along the fluidic channel when a direct current (DC) potential difference occurs between the first and second electrodes. Accordingly, it is possible to fabricate the tunable capacitor with the simplified fabrication process, good reliability and durability, and no restriction on the tuning range. | 05-06-2010 |
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 |
20120193997 | WIRELESS POWER TRANSMISSION SYSTEM AND RESONATOR FOR THE SYSTEM - Provided is a wireless power resonator. The wireless power resonator, including a transmission line and a capacitor, may form a loop structure, and may additionally include a matcher to determine an impedance of the wireless power resonator. | 08-02-2012 |
20120217820 | WIRELESS POWER TRANSMISSION SYSTEM AND RESONATOR FOR THE SYSTEM - Provided is a wireless power resonator. The wireless power resonator may include a transmission line and a capacitor, may form a loop structure, and may further include a matcher to determine an impedance of the wireless power resonator. | 08-30-2012 |
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 |
20120293009 | APPARATUS AND METHOD OF PROTECTING POWER RECEIVER OF WIRELESS POWER TRANSMISSION SYSTEM - An apparatus and method of protecting a power receiver of a wireless power transmission system are provided. A wireless power receiver includes a rectifier comprising an input and an output, and configured to receive a signal through the input, to rectify the signal to produce a rectified signal, and to output the rectified signal through the output, and a capacitor connected to the output of the rectifier and to ground. The wireless power receiver further includes a direct current-to-direct current (DC/DC) converter connected to the output of the rectifier and to a load, and configured to convert the rectified signal to a power, and to provide the power to the load, and a device configured to create a short circuit to protect the rectifier and/or the capacitor when a voltage greater than a threshold voltage is applied to the input of the rectifier and/or the output of the rectifier. | 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 |
20120300875 | APPARATUS FOR AND METHOD OF TRANSMITTING HIGH EFFICIENCY VARIABLE POWER - An apparatus for transmitting a high efficiency variable power includes a pulse generating unit configured to generate a pulse signal comprising a pulse having a duration corresponding to an amount of power transmitted; a pulse stream generating unit configured to convert the pulse signal to a pulse stream having pulse shape corresponding to the duration of the pulse and data to be transmitted; and a high frequency modulating unit configured to output a variable power by modulating a high frequency signal having a constant amplitude on a time axis by repeatedly outputting and not outputting the high frequency signal based on the pulse stream. | 11-29-2012 |
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 |
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 |
20130033117 | WIRELESS POWER TRANSMISSION SYSTEM, AND METHOD AND APPARATUS FOR CONTROLLING POWER IN WIRELESS POWER TRANSMISSION SYSTEM - A wireless power transmission system, and an apparatus and method for controlling power in the wireless power transmission system are provided. The method includes determining a resonance frequency of the wireless power transmission system in which a wireless power transmission efficiency is greater than or equal to a predetermined value. The method further includes generating an operation power based on the wireless power transmission efficiency, the operation power being used to operate a target device. The method further includes transmitting the operation power to the target device. The method further includes controlling an amount of the operation power received by the target device to be within a predetermined range. | 02-07-2013 |
20130035034 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD IN WIRELESS POWER TRANSMISSION SYSTEM - A communication method in a wireless power transmission system includes detecting state information of a plurality of channels available in a communication cell when all of the plurality of channels have already been respectively assigned to a plurality of sources configured to transmit wireless power respectively, determining a channel to be used for communication based on the state information, determining whether the determined channel is being used by a respective one of the plurality of sources to which the determined channel has already been assigned, and determining whether the determined channel is to be used for communication based on a result of the determination of whether the determined channel is being used. | 02-07-2013 |
20130035126 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD IN WIRELESS POWER TRANSMISSION SYSTEM - A communication apparatus in a wireless power transmission system includes an operating mode converter configured to switch an operating mode of the communication apparatus between a transmitting mode and a receiving mode according to a predetermined timing; and a transmitting unit configured to transmit state information of a channel occupied by a source including the communication apparatus using a continuous wave signal while the communication apparatus is operating in the transmitting mode irrespective of whether the communication apparatus is performing communication via the occupied channel. The source including the communication apparatus is configured to transmit wireless power. The occupied channel has been assigned to the source including the communication apparatus from a plurality of channels available in a communication cell for assignment to a plurality of sources each configured to transmit wireless power. | 02-07-2013 |
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 |
20130113296 | WIRELESS POWER TRANSMISSION SYSTEM, RESONATOR IN WIRELESS POWER TRANSMISSION SYSTEM, AND RESONATOR DESIGN METHOD FOR OPTIMUM POWER DIVISION - A wireless power transmission system, a resonator in the wireless power transmission system, and a resonator design method for optimum power division are provided. A power receiver of the wireless power transmission system, includes a resonator configured to receive a power from a power transmitter. The power receiver further includes a power supply configured to supply the received power to a load. A figure of merit (FOM) of the resonator corresponds to a power dividing ratio of the power transmitter. | 05-09-2013 |
20130113298 | WIRELESS POWER TRANSMISSION SYSTEM AND METHOD BASED ON IMPEDANCE MATCHING CONDITION - A wireless power transmission system and a method based on an impedance matching condition are provided. A source device of the wireless power transmission system, includes a power converter configured to generate power. The source device further includes a resonator configured to transmit the power to a target device. A ratio of an input impedance of the resonator to an output impedance of the power converter is less than a reference value. | 05-09-2013 |
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 |
20130134791 | WIRELESS POWER TRANSMISSION SYSTEM WITH ENHANCED MAGNETIC FIELD STRENGTH - A wireless power transmission system with an enhanced magnetic field strength is provided. A wireless power transmitter includes a generator configured to generate a power. The wireless power transmitter further includes a resonator configured to generate a magnetic field to transmit the power to a target device. The wireless power transmitter further includes a slab unit configured to enhance the magnetic field. | 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 |
20130271222 | APPARATUS AND METHOD FOR BALANCED POWER AMPLIFICATION - An apparatus and a method for balanced power amplification are provided. An amplifier includes a splitter configured to split an input signal into a first input signal and a second input signal that include a 90° phase difference. The amplifier further includes a first power amplifier (PA) configured to amplify the first input signal to generate a first output signal. The amplifier further includes a second PA configured to amplify the second input signal to generate a second output signal. The amplifier further includes a combiner configured to combine the first output signal and the second output signal that include the 90° phase difference to generate an output signal. | 10-17-2013 |
20140021796 | WIRELESS POWER TRANSMITTER, WIRELESS POWER RELAY APPARATUS, AND WIRELESS POWER RECEIVER - A wireless power transmitter includes a source resonator configured to wirelessly transmit power via magnetic coupling with a target resonator; and an impedance adjusting unit configured to adjust an impedance of the source resonator using a plurality of impedance-matching bars located in the source resonator. | 01-23-2014 |
20140312993 | METHOD OF FABRICATING MULTI-BAND FILER MODULE - A method of fabricating a multi-band filter module is provided. The method includes forming a Film Bulk Acoustic Resonator (FBAR) on a piezoelectric substrate by forming a resonant part on the piezoelectric substrate and then an air gap recessed on a surface of the piezoelectric substrate and positioned under the resonant part; and forming a Surface Acoustic Wave (SAW) device on the piezoelectric substrate in which the steps of forming the FBAR and the SAW are concurrently performed. | 10-23-2014 |