Abstract: A wireless power transmitter and a method for detecting a change in load during wireless charging in the wireless power transmitter is provided. The wireless power transmitter includes a power transmission unit configured to transmit power to a wireless power receiver, a current detection unit configured to measure a voltage value corresponding to a current that is output to the power transmission unit while the power is transmitted from the power transmission unit, and a controller configured to adjust the power transmitted by the power transmission unit based on the measured voltage value.

Abstract: A wireless power transmitter and a method of controlling the wireless power transmitter are provided. The wireless power transmitter includes a power supply configured to supply charging power; a power transmitter configured to transmit the charging power to a wireless power receiver; an overcurrent protection circuit configured to change an impedance of the wireless power transmitter; and a controller configured to monitor a current value of an output terminal of the power supply, and connect the overcurrent protection circuit to the power transmitter if the monitored current value is greater than a predetermined threshold.

Abstract: A charging device for charging one or more electronic devices is provided. The charging device includes a charging unit configured to include a first charging unit, and a second charging unit, the second charging unit protruding from charging unit at an angle greater than or equal to a predetermined reference angle, where, if at least one of the first charging unit and the second charging unit is arranged to face at least one electronic device in a face-to-face manner, the at least one of the first charging unit and the second charging unit supplies wireless power to the at least one electronic device.

Abstract: A method and a wireless power transmitter for transmitting charging power to a wireless power receiver are provided. The method includes applying the charging power to the wireless power receiver; determining whether a current value of the charging power is greater than a predetermined threshold; and driving the overcurrent protection circuit upon a determination that the current value of the charging power is greater than the predetermined threshold.

Abstract: A cordless charging apparatus is provided. The cordless charging apparatus includes a cordless power reception resonator including a feeding connector for electric feeding, and a ground connector for grounding. The ground connector is spaced apart from a connection terminal connecting the cordless power reception resonator to a circuit.

Abstract: A wireless electric power receiver for receiving wireless electric power from a wireless electric transmitter is provided. The wireless electric power receiver includes an electric power receiving unit that receives wireless electric power from the wireless electric power transmitter; a rectifying unit that rectifies wireless electric power in the form of alternating current output from the wireless electric power receiving unit and outputs rectified electric power; and an electric power regulation unit that receives an input of the rectified electric power, outputs first electric power which has a lower value of a first voltage than that of the rectified electric power for a first period, and does not output electric power for a second period, so as to output electric power with a predetermined voltage value.

Abstract: A wireless power transmission device is provided. The wireless power transmission device includes a resonance signal generator and a controller. The resonance signal generator is configured to transmit wireless power to a wireless power reception device. The controller is configured to adjust the wireless power transmitted to the wireless power reception device, when a predetermined condition caused by over-voltage protection operation at the wireless power reception device is detected.

Abstract: Provided is an over-voltage protection device for a resonant wireless power transmission device. The over-voltage protection device includes an amplifier for amplifying a transmission signal, a resonance signal generator for generating a wireless resonance signal according to the transmission signal amplified by the amplifier, a voltage detector for sensing a voltage of the wireless resonance signal generated by the resonance signal generator, and a controller for monitoring the voltage detected by the voltage detector to determine whether the voltage repetitively increases and decreases with periodicity when the voltage is greater than a reference voltage and controlling the amplifier to decrease an output of the transmission device by a value according to a result of the determination.

Abstract: Disclosed is a method for advance detection of output power, before arrival at a boundary frequency between an inband and an outband during frequency tracking in a wireless charging apparatus, the wireless charging apparatus including a first resonator resonating at a lower-limit frequency of the inband and a second resonator resonating at an upper-limit frequency of the inband, to adaptively adjust the frequency based on the power values output from the first and second resonators, and to determine a power transmission control value corresponding to the adjusted frequency, thereby enabling frequency control and power control within the inband.

Abstract: A wireless electric power transmitter for transmitting electric power for a charging function to a wireless electric power receiver is provided. The wireless electric power transmitter includes an electric power supply unit which supplies electric power; an amplifier which amplifies and outputs the electric power supplied from the electric power supply unit by a preset gain as a magnitude of measured impedance increases; and a transmitter which transmits the amplified electric power to the wireless electric power receiver.

Abstract: A wireless electric power receiver for receiving wireless electric power from a wireless electric transmitter is provided. The wireless electric power receiver includes an electric power receiving unit that receives wireless electric power from the wireless electric power transmitter; a rectifying unit that rectifies wireless electric power in the form of alternating current output from the wireless electric power receiving unit and outputs rectified electric power; and an electric power regulation unit that receives an input of the rectified electric power, outputs first electric power which has a lower value of a first voltage than that of the rectified electric power for a first period, and does not output electric power for a second period, so as to output electric power with a predetermined voltage value.

Abstract: A wireless electric power receiver for receiving wireless electric power from a wireless electric transmitter is provided. The wireless electric power receiver includes an electric power receiving unit that receives wireless electric power from the wireless electric power transmitter; a rectifying unit that rectifies wireless electric power in the form of alternating current output from the wireless electric power receiving unit and outputs rectified electric power; and an electric power regulation unit that receives an input of the rectified electric power, outputs first electric power which has a lower value of a first voltage than that of the rectified electric power for a first period, and does not output electric power for a second period, so as to output electric power with a predetermined voltage value.

Abstract: A cordless charging apparatus is provided. The cordless charging apparatus includes a cordless power reception resonator including a feeding connector for electric feeding, and a ground connector for grounding. The ground connector is spaced apart from a connection terminal connecting the cordless power reception resonator to a circuit.

Abstract: A shunt capacitor is connected to a wireless charging resonator to prevent harmonics emitted from a power amplifier from radiating to the outside, and at least one circuit having a high impedance relative to a Near Field Wireless Communication (NFC) frequency band is formed at a front side or a rear side of the shunt capacitor for solving the problems of radiating noise components due to wireless charging and of lowering an NFC signal and a power transmission intensity due to a concurrent interference between a wireless charging resonator and an NFC antenna.

Abstract: Methods and apparatus are provided for detecting a non-intended object of power reception by a power transmitter. Power transmission for communication is performed, when the load change is sensed that has a value greater than or equal to a predetermined threshold. It is determined whether a subscription request, for subscribing to a network is received within a predetermined time period. The power transmission for communication is stopped when the subscription request is not received within the predetermined time period. Power is transmitted to a power receiver that has transmitted the subscription request, when the subscription request is received within the predetermined time period. It is determined whether a leakage power value exceeds an allowable range, when the power state report is received from the power receiver. The transmission of the power to the power receiver is stopped, when the leakage power value exceeds the allowable range.

Abstract: A wireless power receiver for wirelessly receiving a supply of power from a wireless power supplier is disclosed. The wireless power receiver includes a power reception unit for wirelessly receiving wireless power from the wireless power supplier; a rectifier for rectifying the wireless power into power including a DC waveform; a power adjustor for configuring a closed loop with the power reception unit for a first period and transferring the wireless power to the rectifier for a second period to adjust a size of the wireless power; and a controller for determining the first period and the second period, wherein the power adjustor is electrically connected to the power reception unit and the rectifier.

Abstract: An apparatus and method are provided for transmitting and receiving power for wireless power transmission. A power transmitting apparatus includes a power supplier for generating power; a resonator for transmitting the power generated by the power supplier to a plurality of power receiving apparatuses; and a controller for determining whether a power transmission to a new power receiving apparatus is possible using a power receiving apparatus management table, when the new power receiving apparatus is detected while the power transmissions of the plurality of power receiving apparatuses are being performed, and controlling the resonator to transmit power to the new power receiving apparatus, when the power transmission to the new receiving apparatus is possible. The power transmitting apparatus stably supplies power to a plurality of power receiving apparatuses by determining power transmission states of the plurality of power receiving apparatuses.

Abstract: A method and power transmitter for efficiently controlling power transmission to one or more power receivers in a wireless multi-power transmission system are provided. The method includes performing, when a predetermined measurement cycle arrives, a load measurement; comparing a current load measurement value with a previous load measurement value; determining whether the current load measurement value is increased over the previous load measurement value by at least as much as a first predetermined threshold; gradually increasing, when the load measurement value is increased over the previous load measurement value by at least as much as the first threshold, a transmission power value until a request for a subscription to a wireless multi-power transmission network from a power reception target within a predetermined time limit; and stopping, when the request for the subscription is not received before the time limit is exceeded, power transmission to the power reception target.

Abstract: An ultrahigh-frequency package module is provided, including a first substrate having a plurality of power lines and a plurality of signal lines, and one or more second substrates provided on one surface of the first substrate and each being provided with at least one antenna. The second substrates are independently arranged one by one in a grid pattern along one surface of the first substrate.