Abstract:
The present invention provides a method for controlling efficient power transmission of a wireless power transmitter. The method includes the steps of: notifying, by a power receiver, a minimum voltage, a maximum voltage, and a reference voltage that is a reference for determining a range for high charging efficiency, and a requirement voltage required by the power receiver of a power transmitter; and supplying, by the power transmitter, transmitting power after determining an optimal efficient voltage range with a high charging efficiency based on the reference voltage, thereby adjusting the transmitting power based on a power reception status of the power receiver. Therefore, the method enables efficient power control for securing optimal charging efficiency of the power receiver, since the power transmitter controls adaptively the transmitting power according to the power reception status of the power receiver. [Reference numerals] (10) Power supply unit; (100) Power transmitter; (110) Power receiver; (12) Amplification unit; (14) Resonance signal generating unit; (16) Voltage/current measuring unit; (18,25) Control unit; (19,26) Wireless communication unit; (20) Resonator; (21) Matching circuit; (22) Rectifier; (23) DC/DC converter; (24) Charging unit/PMIC; (27) Temperature measuring unit; (AA) Communication; (BB) Temperature
Abstract:
The present invention connects a shunt capacitor to a wireless resonator for charging to prevent the emission of harmonics, which are emitted by a power amplifier, to the outside and forms at least one circuit having high impedance in respect to a NFC frequency band (13.56MHz) on the front end or the rear end of the shunt capacitor.
Abstract:
PURPOSE: A wireless charging device and a wireless charging method are provided to reduce the waste of resources by adaptively controlling a transmission cycle. CONSTITUTION: At least one mobile terminal sets a transmission cycle. A control unit (105) controls the set transmission cycle. A communication unit (135) receives power information from the mobile terminal. The power information is transmitted to a wireless charging device. The control unit increases or decreases the transmission cycle of the power information. [Reference numerals] (105,155) Control unit; (110) Power supply unit; (115) Amplifying unit; (120,142) Matching unit; (125,140) Resonator; (130,150) Measurement unit; (135,170) Communication unit; (145) Power conversion unit; (165) Charging unit; (AA) Wireless charging device; (BB,DD) Power information; (CC) Mobile device
Abstract:
PURPOSE: A wireless power transmitter and a control method thereof are provided to minimize a collision with a heterogeneous communication channel and to select a channel for communicating with a wireless power receiver. CONSTITUTION: A control method of a wireless power transmitter includes the following steps: a step of determining a search channel used in communication with a wireless power receiver; a step of detecting at least one of the energy level and RSSI(Received Signal Strength Indication) value of a signal from the search channel; and a step of avoiding a collision with a heterogeneous communication channel, and determining whether or not the search channel is determined to be a communication channel based on a detected result. [Reference numerals] (AA) Start; (BB,EE,FF) No; (CC,DD,GG) Yes; (HH) End; (S601) Initialize or change a channel; (S603) Search for the channel(ED or RSSI); (S605) Less than a critical value?; (S607) Search for all channels?; (S609) Move the channel; (S611) Increase the critical value; (S613) Fix the channel; (S615) Generate a network ID; (S619) Start the network
Abstract:
PURPOSE: A reception power conversion device for resonance type wireless charging system is provided to improve output by including a reflux switching unit which refluxes power. CONSTITUTION: A wireless power reception unit receives wireless power. A rectification unit rectifies AC type power into DC power. A reflux switching unit(80) refluxes the AC type power. A feedback circuit(60) detects a level by receiving the feedback signal of the output signal. A control unit(70) controls switching operation of the reflux switching unit.
Abstract:
PURPOSE: A portable terminal including a wireless charge module is provided to prevent an antenna from overlapping with a battery pack by arranging an RX(Receiver) resonance antenna around a battery mounting groove. CONSTITUTION: A portable terminal(200) includes a main body and an RX resonance antenna. The main body includes an accommodation groove(215). The RX resonance antenna is aligned with a battery mounting groove(219). The RX resonance antenna is aligned with three or more sides of the battery mounting groove.
Abstract:
PURPOSE: A wireless power receiver for adjusting wireless power by using a switch is provided to obtain stable DC(Direct Current) output power by including a capacitor and a resonant-type inductor with the switch. CONSTITUTION: A power receiving unit(110) receives wireless power from a wireless power supplier. A rectifying unit(130) rectifies the wireless power into power of a DC waveform. A power adjusting unit(120) is electrically connected with the power receiving unit and the rectifying unit, forms a closed loop with the power receiving unit for a first period, and delivers the wireless power to the rectifying unit for a second period in order to adjust the size of the wireless power. A control unit(140) determines the first and the second periods. [Reference numerals] (100) Wireless power receiver; (110) Power receiving unit; (120) Power adjusting unit; (130) Rectifying unit; (140) Control unit
Abstract:
PURPOSE: A bidirectional communication method between a transmitter and a receiver in a wireless power transceiver system and devices thereof are provided to efficiently transceive wireless power by using bidirectional communication transmitter and receiver. CONSTITUTION: Turn-on power is transmitted to a receiver(200) through a Tx resonator according to the detection of the receiver. The transmission of wireless power is requested through a wireless communication module. An SID(short ID) and a time slot corresponding to the receiver is allocated. The SID and the time slot are transmitted to the receiver through the wireless communication module. Demand power is requested from the receiver through the wireless communication module. The impossibility of transmitting the demand power is notified to the receiver through the wireless communication module according to a comparison result. [Reference numerals] (100) Transmitter; (200-1,200-2,200-N) First receiver, N receiver
Abstract:
PURPOSE: A wireless charging apparatus and a wireless charging method are provided to enable a user to accurately check a complete charging state by performing an auxiliary charge process for charging a wireless power transmitter and a wireless power receiver. CONSTITUTION: A power receiving unit(210) receives power from a wireless power transmitter. A second communication unit(250) transmits a packet with a complete charging state to the wireless power transmitter when the charging is completed by the received power. A PMIC(Power Management IC)(230) performs a charging process using the received power, provides a complete charging message in a complete charging condition, and performs an auxiliary charging process. A second control unit(220) controls the communication unit to receive the complete charging message and transmit a packet including the complete charging state. [Reference numerals] (100) Wireless power transmitter; (110) Power source; (120) First control unit; (130) Power converting unit; (140) First communication unit; (150) First display unit; (210) Power receiving unit; (220) Second communication unit; (240) Battery; (250) Second communication unit; (260) Second display unit; (AA) Wireless power receiver; (BB) Wireless power; (CC) Communication packet