Abstract: 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.

Abstract: The present invention relates to a skin administration system capable of improving the efficiency of skin delivery of an ingredient for controlling release of neurotransmitters and, particularly, to a microneedle containing an ingredient for controlling release of neurotransmitters.

Abstract: Provided are a negative electrode active material for a non-aqueous electrolyte rechargeable battery, a method for preparing the same, and a non-aqueous electrolyte rechargeable battery including the same and, more specifically, a negative electrode active material for a non-aqueous electrolyte rechargeable battery, including a silicon oxide composite, capable of degrading irreversible characteristics and improving structural stability of the non-aqueous electrolyte rechargeable battery, the silicon oxide composite containing silicone, a silicon oxide represented by general formula SiOx (0<x<2), and an oxide including silicone and M (M is any one element selected from the group consisting of Mg, Li, Na, K, Ca, Sr, Ba, Ti, Zr, B, and Al), a method for preparing the same, and to a non-aqueous electrolyte rechargeable battery including the same.

Abstract: An interference control method of a power transmitting unit (PTU) includes determining whether the PTU is in an interference environment in which interference by a neighbor PTU occurs, and controlling a communication parameter of either one or both of the neighbor PTU and a power receiving unit (PRU) in response to a result of the determining being that the PTU is in the interference environment.

Abstract: A power providing device according to an embodiment of the present disclosure comprises a charger configured to adjust at least one of a voltage and a current of power provided from a power supplying source and to provide the adjusted power to an electronic device and a processor configured to receive, from the electronic device, at least one of identification information of the electronic device and information related to a battery of the electronic device, and to control the charger to adjust at least one of the voltage and the current of the power using at least one of the identification information about the electronic device and the information related to the battery of the electronic device.

Abstract: A method of synchronization control of a power transmitting unit (PTU) includes network-connecting a PTU to a PTU operating in a slave mode by setting an operation mode of the PTU to a master mode, and transmitting a signal to a power receiving unit (PRU) by controlling either one or both of a communication time and a communication frequency of the PTU operating in the slave mode.

Abstract: Provided is a wrist wearable terminal including: a body portion including a function module; a coupling portion fastening the body portion on a wrist; and at least one strap portion linking the body portion and the coupling portion and including at least one function module that is coupled to the function module of the body portion via a signal line to convert or activate a use of at least one function of the wrist wearable terminal depending on a state of wearing of the wrist wearable terminal.

Abstract: A method of operating a wireless power transmission apparatus includes receiving information on rectifier output voltages from at least one wireless power reception apparatus; determining whether the rectifier output voltages are within a predetermined operating range, and controlling an impedance of the wireless power transmission apparatus based on a result of the determining.

Abstract: An apparatus that transmits and receives wireless power, includes a controller configured to determine whether the apparatus is to operate in a power reception mode or a power transmission mode based on a capacity of a battery of the apparatus, and a capacity of a battery of another apparatus. The apparatus further includes a resonator configured to receive power from the other apparatus in response to the apparatus being determined to operate in the power reception mode, and transmit power to the other apparatus in response to the apparatus being determined to operate in the power transmission mode.

Abstract: An apparatus and a method for charge control are provided. The apparatus for charge control may include an integrated direct current-to-direct current (DC/DC) converter configured to step up an output voltage level of a load to be greater than or equal to a supply voltage level set in a power amplifier, and the power amplifier configured to convert a direct current (DC) voltage stepped up by the integrated DC/DC converter into an alternating current (AC) voltage based on a resonant frequency, and to amplify the converted AC voltage. The apparatus for charge control may include a rectification unit configured to convert an AC power received wirelessly into a DC power; and a DC/DC converter configured to step down a voltage level of the DC power to a voltage level required by a load in the receiving mode.

Abstract: A resonator has an increased isolation for stable wireless power transmission. A material that reduces resonance coupling may be disposed in a space between each of a plurality of resonators and a resonator adjacent to each of the plurality of resonators. A material that reduces resonance coupling may be disposed on a plane opposite to a direction in which a resonator resonates. Power at an operating frequency set to be equal to or within a predetermined range of a frequency corresponding to a resonant mode may be injected into a plurality of transmission resonators.

Abstract: 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.

Abstract: A wireless power transmitter is provided. The wireless power transmitter includes a power supply unit that supplies Alternating Current (AC) power having a predetermined voltage value, a rectification unit that is connected to the power supply unit, and rectifies the AC power, a voltage adjustment unit that is connected to the rectification unit, and adjusts a magnitude of an output voltage value of the rectified power, and outputs the adjusted power to a power transmission unit, the power transmission unit that generates the adjusted power output from the voltage adjustment unit as a signal in a form in which wireless power transmission is possible, and transmits the generated signal to a wireless power receiver, and a control unit that controls the magnitude of the output voltage value of the rectified power to be adjusted by the voltage adjustment unit in accordance with a predetermined criterion.

Abstract: A wireless power receiving device and a wireless power transmission apparatus are provided. The wireless power receiver may include a resonator configured to emit an electromagnetic field, a blocker configured to surround a portion of an exterior of the resonator, and a spacer disposed between the resonator and the blocker.

Abstract: An interference control method of a power transmitting unit (PTU) includes determining whether the PTU is in an interference environment in which interference by a neighbor PTU occurs, and controlling a communication parameter of either one or both of the neighbor PTU and a power receiving unit (PRU) in response to a result of the determining being that the PTU is in the interference environment.

Abstract: A system and a device for wirelessly transferring power without a cable are provided. A wireless electromagnetic receiver includes a first device configured to be magnetized based on an electromagnetic field. The wireless electromagnetic receiver further includes a second device configured to transform the magnetization of the first device into a power, the second device being not in contact with the first device.

Abstract: A wireless power transmission apparatus includes a plurality of transmission (TX) resonators configured to resonate with at least one reception (RX) resonator, and wirelessly transmit power to the at least one RX resonator; and a frequency controller configured to control the input frequency so that power is stably supplied to the at least one RX resonator.

Abstract: A semiconductor package may be provided. The semiconductor package may include a substrate having a first surface over which bond fingers are arranged, the other surface facing away from the first surface and over which ball lands are arranged, and terminals which are respectively formed over the bond fingers. The semiconductor package may include a semiconductor chip disposed over the first surface of the substrate, and having an active surface facing the first surface and over which bonding pads are arranged. The semiconductor package may include bumps respectively formed over the bonding pads of the semiconductor chip, and including pillars and layers which are formed over first side surfaces of the pillars and are joined with the terminals of the substrate.

Abstract: Disclosed is a boron recovering device including: an aeration-type water-channel reactor including a water channel; at least one aeration unit disposed in the water channel and aerating a boron-containing solution by passing it through the water channel to deposit boron in the form of borax; and a precipitation bath precipitating the deposited borax in the boron-containing solution having passed through the aeration-type water-channel reactor and separating a filtrate by overflowing, a boron recovering device, a method of recovering boron, and a boron recovering system.

Abstract: An apparatus and a method for charge control are provided. The apparatus for charge control may include an integrated direct current-to-direct current (DC/DC) converter configured to step up an output voltage level of a load to be greater than or equal to a supply voltage level set in a power amplifier, and the power amplifier configured to convert a direct current (DC) voltage stepped up by the integrated DC/DC converter into an alternating current (AC) voltage based on a resonant frequency, and to amplify the converted AC voltage. The apparatus for charge control may include a rectification unit configured to convert an AC power received wirelessly into a DC power; and a DC/DC converter configured to step down a voltage level of the DC power to a voltage level required by a load in the receiving mode.