Electromagnet Or Highly Inductive Systems Patents (Class 307/104)
  • Patent number: 11368049
    Abstract: The present disclosure relates to systems and methods for electrodynamic wireless power receivers. In some examples, a wireless power receiver electromechanically converts energy from a magnetic field. The wireless power receiver includes a planar suspension structure and at least one magnet. The planar suspension structure is tuned to cause oscillation of the at least one magnet at a resonance frequency based on a frequency of the time-varying magnetic field to generate electrical energy in the wireless power receiver.
    Type: Grant
    Filed: November 17, 2020
    Date of Patent: June 21, 2022
    Assignee: UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC.
    Inventors: David Patrick Arnold, Alexandra Garraud, Nicolas Garraud
  • Patent number: 11362547
    Abstract: A wireless power supply apparatus including a signal transmitting terminal and a signal receiving terminal is provided. The signal transmitting terminal encodes a digital data into a control signal and transmits a power supply signal in a manner of wireless communication according to the control signal. The signal receiving terminal receives the power supply signal from the signal transmitting terminal in the manner of wireless communication. The signal receiving terminal converts the power supply signal into a power source signal and a data signal and decodes the data signal into the digital data.
    Type: Grant
    Filed: June 19, 2019
    Date of Patent: June 14, 2022
    Assignee: E Ink Holdings Inc.
    Inventors: Chuen-Jen Liu, Yi-Jhou Shen, Liang-Yu Yan
  • Patent number: 11362544
    Abstract: The present disclosure provides a signal processing method performed by a hybrid wireless power transmitting apparatus which is configured to transmit wireless power signals based on magnetic resonance and magnetic induction, the method comprising transmitting a first object detection signal via an inductive power transmitting unit and a second object detection signal via a magnetic resonant power transmitting unit alternatively; operating one of the inductive power transmitting unit and the magnetic resonant power transmitting unit which is selected based on an inductive response signal and a resonant response signal corresponding to the first object detection signal and the second object detection signal respectively; and transmitting wireless power signal via the selected power transmitting unit; and a hybrid wireless power transmitting apparatus using the method.
    Type: Grant
    Filed: May 17, 2021
    Date of Patent: June 14, 2022
    Assignee: GE Hybrid Technologies, LLC
    Inventors: Chun-Kil Jung, Byong-Uk Hwang
  • Patent number: 11355967
    Abstract: A wireless power transfer foreign object detector having at least one foreign object detector providing at least one foreign object detection signal, and at least one primary transmitter coil providing at least one primary transmitter signal, the primary transmitter coil responsive to the at least one foreign object detection signal.
    Type: Grant
    Filed: September 14, 2020
    Date of Patent: June 7, 2022
    Assignee: TRIUNE IP, LLC
    Inventor: Ross E. Teggatz
  • Patent number: 11355948
    Abstract: Embodiments describe a wireless charging system including an accessory device and a host device. The host device can include a housing having a charging surface and power transmitting circuitry coupled to a power source. The power transmitting circuitry can include an inductive transmitter coil configured to receive a first power and generate magnetic field, an amplifier coupled to the inductive transmitter coil and configured to output the first power to the inductive transmitter coil, an output sensor coupled to the inductive transmitter coil and configured to measure the first power to the inductive transmitter coil, and a power tracking controller coupled to the sensor probe. The power tracking controller can be configured to receive measurement of the first power, and generate a control signal based on the measured first power to modify an output impedance of the amplifier to output a second power different from the first power.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: June 7, 2022
    Assignee: Logitech Europe S.A.
    Inventors: Maxim Vlasov, Laurent Plancherel
  • Patent number: 11355972
    Abstract: A wireless power receiver receives a power signal from a wireless power transmitter, the wireless power receiver including a reception antenna including a reception coil, a rectifier circuit that rectifies a current of the reception antenna, a plurality of position detection coils provided near the reception coil or provided to overlap the reception coil, and a position detection unit that detects a positional relation between the position detection coils and a transmission coil of the wireless power transmitter based on a detection signal indicating an electrical state of the position detection coils. An electronic device includes the wireless power receiver. Another electronic device includes a wireless power receiver that receives a power signal from a wireless power transmitter and that can detect a position of a transmission coil of the wireless power transmitter, and a notification unit that notifies a user of information based on the position of the transmission coil.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: June 7, 2022
    Assignee: ROHM Co., LTD.
    Inventor: Daisuke Uchimoto
  • Patent number: 11355970
    Abstract: According to various embodiments, a wireless power transmission device comprises: a first-scheme communication circuit; a power source for generating a source signal; a power transmission circuit for forming an RF wave on the basis of the source signal; and a control circuit, wherein the control circuit can be configured to receive, from an electronic device supporting first-scheme communication and second-scheme communication, a communication signal including information on a communication environment according to the second-scheme communication through the first-scheme communication circuit, and to control, on the basis of the information on the communication environment according to the second-scheme communication, the frequency of the source signal generated by the power source and/or the transmission strength of the RF wave. Other various embodiments are possible.
    Type: Grant
    Filed: December 24, 2018
    Date of Patent: June 7, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jaeseok Park, Sanghyuk Wi, Youngho Ryu, Sungbum Park, Sungku Yeo
  • Patent number: 11349354
    Abstract: A wireless signal may supply a wireless power signal to a device to power the device for an authentication. If the device is authenticated, the wireless signal may be adjusted to provide power to the device. If the device is not authenticated, the wireless signal may be adjusted to avoid providing power to the device.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: May 31, 2022
    Assignee: Comcast Cable Communications, LLC
    Inventor: Michael Chen
  • Patent number: 11349343
    Abstract: A method and apparatus are provided to facilitate the estimation of a measured parameter. In the context of a method, a series of measurement and transmission phases are conducted. During the measurement phase, the method includes receiving an input based on a measured parameter and comparing a voltage that is based on the input that is received over time to a threshold. The method also includes triggering the transmission phase in which a control signal is provided to facilitate discharge of the voltage in response to satisfaction of the threshold. The method further includes evaluating the transmission phases to determine an estimate of the input that is based on the measured parameter. A corresponding apparatus is also provided.
    Type: Grant
    Filed: January 29, 2021
    Date of Patent: May 31, 2022
    Assignee: NOKIA TECHNOLOGIES OY
    Inventor: Marijan Herceg
  • Patent number: 11349341
    Abstract: A wireless power transmission method of control is disclosed where equalization of the reactive voltages of a series resonant circuit, which is part of a transmitter antenna tuning and coupling unit, is obtained by adjusting the switching frequency and thereby used to determine a switching frequency of the driving high frequency inverter. By measuring and largely equalizing the voltage parameters of the series resonant circuit to establish an inverter switching frequency, improved efficiency of the wireless power transmission method.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: May 31, 2022
    Assignee: Vitesco Technologies USA, LLC
    Inventors: Perry Robert Czimmek, Willem Nicolaas Van Vuuren, Douglas Edward Cosby
  • Patent number: 11349342
    Abstract: A wireless power receiver includes one or more tunable capacitors in parallel with an inductor. The wireless power receiver adapted to receive an induced voltage input at the inductor due to a magnetic field generated by a wireless power transmitter. The rectifier has an output with a rectified voltage and a rectified current. A controller has a first input for receiving a signal representative of the rectified voltage and a first output for supplying an adjustment signal to the tunable capacitor. The controller includes a processor coupled to the first input and is configured to operate on the signal representative of rectified voltage to produce a desired capacitance value for capacitor and provide the adjustment signal determined so as to adjust a capacitance value of capacitor to the desired capacitance value.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: May 31, 2022
    Assignee: WITRICITY CORPORATION
    Inventors: Oguz Atasoy, Karl Twelker, Kylee Devro Sealy
  • Patent number: 11342779
    Abstract: A control method for a wireless charging apparatus includes: receiving a power adjustment value transmitted by a terminal; and adjusting at least one of an output voltage or an output frequency of a wireless Alternating Current (AC) power signal according to the power adjustment value to adjust an output power of the wireless AC power signal.
    Type: Grant
    Filed: September 28, 2019
    Date of Patent: May 24, 2022
    Assignee: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
    Inventors: Yanteng Wang, Zhijie Li, Chunli Xu
  • Patent number: 11340715
    Abstract: One embodiment provides a method, including: detecting, at a wireless charger integrated into an electronic device, a connection of a wearable accessory device, wherein the wireless charger is positioned proximate to a probable user contact position; and transmitting, using the wireless charger and during a period when the connection is established, a charge to the wearable accessory device; wherein the wearable accessory device is worn by a user during the connection. Other aspects are described and claimed.
    Type: Grant
    Filed: November 18, 2019
    Date of Patent: May 24, 2022
    Assignee: Lenovo (Singapore) Pte. Ltd.
    Inventors: Russell Speight VanBlon, Nathan J. Peterson, Mark Patrick Delaney, John Carl Mese, Arnold S. Weksler
  • Patent number: 11342793
    Abstract: Systems, methods and apparatus for wireless charging are disclosed. A charging device has a plurality of charging cells provided on a charging surface, a charging circuit and a controller. The controller may be configured to cause the charging circuit to provide a charging current to a resonant circuit when a receiving device is placed on the charging device, detect a change or rate of change in voltage or current level associated with the resonant circuit or a change or rate of change in power transferred to the receiving device and determine that the receiving device has been removed from the charging device when the change or rate of the change in voltage or current level or change or rate of change in power transferred to the receiving device exceeds a threshold value.
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: May 24, 2022
    Assignee: AIRA, INC.
    Inventors: Eric Heindel Goodchild, John Winters, James Scott
  • Patent number: 11342800
    Abstract: A magnetic alignment system can include a primary annular magnetic alignment component and a secondary annular magnetic alignment component. The primary alignment component can include an inner annular region having a first magnetic orientation, an outer annular region having a second magnetic orientation opposite to the first magnetic orientation, and a non-magnetized central annular region disposed between the primary inner annular region and the primary outer annular region. The secondary alignment component can have a magnetic orientation with a radial component. Additional features, such as a rotational magnetic alignment component and/or an NFC coil and circuitry can be included.
    Type: Grant
    Filed: September 22, 2020
    Date of Patent: May 24, 2022
    Assignee: Apple Inc.
    Inventors: Aaron A. Oro, Karl Ruben F. Larsson, Timothy J. Rasmussen, Christopher S. Graham, Eric S. Jol, James C. Wu, Demetrios B. Karanikos
  • Patent number: 11342950
    Abstract: A system filters out-of-band radio frequency emissions generated by wireless transmission of a first signal by a first transmitter from a wireless transmission of a second transmitter. The first signal is communicated from the first transmitter to the second transmitter via one or more wired connections. An out-of-band portion of a modulated format of the first signal is inverted to generate an inverted out-of-band component signal. The inverted out-of-band component signal is combined with a second signal of the second transmitter to create a filtering second signal. The filtering second signal is wirelessly transmitted from the second transmitter concurrently with wireless transmission of the first signal by the first transmitter, wherein the wireless transmission of the inverted out-of-band component signal in the filtering second signal by the second transmitter is synchronized with the wireless transmission of the first signal by the first transmitter.
    Type: Grant
    Filed: August 24, 2020
    Date of Patent: May 24, 2022
    Assignee: Microsoft Technology Licensing, LLC
    Inventor: Charbel Khawand
  • Patent number: 11336202
    Abstract: Methods and apparatuses for controlling a rectified voltage outputted by a rectifier circuit is described. In response to an occurrence of an overvoltage condition, an apparatus can regulate a gate-source voltage of a low-side switching element of the rectifier circuit to control the rectified voltage. The apparatus can include an operational amplifier that can compare a reference voltage and with a scaled voltage measured at a node between the low-side switching element and a high-side switching element of the rectifier circuit. The operational amplifier can output a voltage to regulate a gate-source voltage of a low-side switching element. The apparatus can further include a current sensor configured to sense current flowing through the low-side switching element. A power dissipation of the low-side switching element can be controlled based on the current being sensed by the current sensor.
    Type: Grant
    Filed: May 12, 2021
    Date of Patent: May 17, 2022
    Assignee: Renesas Electronics America Inc.
    Inventors: Marco Sautto, Sercan Ipek, Jiangjian Huang, Turev Acar
  • Patent number: 11336335
    Abstract: The present disclosure provides a terminal device and a protective shell, and belongs to the technical field of communication. The terminal device includes a body, a first coil, a second coil and a shielding member. The body includes a rear shell. The first coil is located in the body. The second coil is located in the body and close to one side of the rear shell, and the second coil at least partially overlaps the first coil. The shielding member covers the sides, far away from the rear shell, of the first coil and the second coil, and is located outside an overlapping portion of the first coil and the second coil, and the first coil is unshielded from the second coil.
    Type: Grant
    Filed: October 23, 2019
    Date of Patent: May 17, 2022
    Assignee: Beijing Xiaomi Mobile Software Co., Ltd
    Inventors: Kaiqi Wu, Yibo Xue, Yanteng Wang
  • Patent number: 11332125
    Abstract: A parking assist device includes a hardware processor to: acquire region information on a parking region in which a contactless power feeding device is provided; perform, based on the region information, a first vehicle control for moving a vehicle to the parking region; and perform, after the vehicle is stopped in the parking region by the first vehicle control, a second vehicle control when relative positions between a power reception device provided in the vehicle and the contactless power feeding device deviate from each other.
    Type: Grant
    Filed: November 17, 2020
    Date of Patent: May 17, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yukio Sakai, Shota Akaura, Yuya Matsumoto
  • Patent number: 11336124
    Abstract: A method of transmitting a signal by a wireless power transmitter in a wireless charging system, wireless power transmitter, and a wireless power receiver are provided.
    Type: Grant
    Filed: February 24, 2021
    Date of Patent: May 17, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyung-Woo Lee, Keum-Su Song, Hee-Won Jung
  • Patent number: 11336122
    Abstract: A wireless power transmission device capable of reducing an output power of wireless power receiving device receiving power transmitted from a wireless power transmission device. The wireless power transmission device including: a DC (Direct Current)/DC converter; an inverter configured to convert output voltage of the DC/DC converter into AC voltage having driving frequency; a power transmission coil configured for the AC voltage to be supplied to from the inverter and configured to generate the AC magnetic field; a transmission-side resonance circuit including the power transmission coil; and control circuit configured to increase difference between a driving frequency of the inverter and a resonance frequency of the transmission-side resonance circuit when a predetermined condition is satisfied.
    Type: Grant
    Filed: June 22, 2020
    Date of Patent: May 17, 2022
    Assignee: TDK CORPORATION
    Inventor: Kazuyoshi Hanabusa
  • Patent number: 11329695
    Abstract: A power supply apparatus includes a power supply unit configured to wirelessly supply power to an electronic apparatus, a communication unit configured to communicate with the electronic apparatus, and a control unit configured to perform control whether to supply power to the electronic apparatus according to whether the electronic apparatus is capable of updating information about the electronic apparatus.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: May 10, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Nobuyuki Tsukamoto, Katsuya Nakano, Marie Tateno
  • Patent number: 11329519
    Abstract: An inductive power transmitter 2 comprising: at least one power transmitting coil 7 configured to generate an inductive power transfer (IPT) field, and an object detection (OD) system 200 configured to detect the presence of an object based on a change in energy decay or change in resonant frequency of a resonant circuit integrated with or coupled to the transmitting coil.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: May 10, 2022
    Assignee: Apple Inc.
    Inventor: Liang Chen
  • Patent number: 11329696
    Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. The devices in the wireless power system may communicate using in-band communication. The wireless power transmitting device may transmit data to the wireless power receiving device using frequency-shift keying (FSK) modulation. The wireless power receiving device may transmit data to the wireless power transmitting device using amplitude-shift keying (ASK) modulation. While transmitting data to the wireless power receiving device using FSK modulation, the wireless power transmitting device may monitor for ASK modulation from the wireless power receiving device. In response to detecting the ASK modulation from the wireless power receiving device, the wireless power transmitting device may abort the FSK data transmission and process the detected ASK modulation to receive data from the wireless power receiving device.
    Type: Grant
    Filed: February 23, 2021
    Date of Patent: May 10, 2022
    Assignee: Apple Inc.
    Inventors: Jeffrey D. Louis, Zaid A. AbuKhalaf
  • Patent number: 11329513
    Abstract: A contactless power transmission apparatus includes a transmitter that includes a transmitter coil that supplies electric power to a receiver and a power supply circuit that supplies alternating current power to the transmitter coil. The receiver includes a resonant circuit including a receiver coil that receives electric power from the transmitter and a resonant capacitor connected in series to the receiver coil, a rectifier circuit that rectifies electric power output from the resonant circuit, and a coil connected in parallel to the resonant circuit between the resonant circuit and the rectifier circuit.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: May 10, 2022
    Assignee: OMRON Corporation
    Inventors: Goro Nakao, Yusuke Kawai, Atsushi Nomura, Toshiyuki Zaitsu, Takeshi Uematsu
  • Patent number: 11329522
    Abstract: A technique for wirelessly charging a wireless device using a charging beam transmitted by a base station in a wireless communication system is disclosed. A method implementation of the technique is performed by the base station and comprises receiving (S208), from the wireless device, feedback on charging quality observed by the wireless device, and adjusting (S212) the charging beam based on the feedback received from the wireless device.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: May 10, 2022
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Jonas Kronander, Andreas Höglund, Andres Laya, Yngve Selén, Hugo Tullberg
  • Patent number: 11329520
    Abstract: A power transmission device includes a power transmission coil, a magnetically shielded space created by a power transmission-side cancel coil arranged outside the power transmission coil, a moving member configured to move a metal foreign substance, and a moving mechanism configured to move a part or all of an upper surface of the moving member from an area outside the magnetically shielded space into the magnetically shielded space.
    Type: Grant
    Filed: January 28, 2021
    Date of Patent: May 10, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Hiroyuki Matsuo, Keisuke Fujimoto
  • Patent number: 11329521
    Abstract: This application provides a wireless charging foreign object detection apparatus, applied to the field of wireless charging technologies. The detection apparatus includes: an excitation coil configured to provide a time-varying magnetic field, detection coils configured to detect a foreign object, and a processor configured to determine whether a foreign object exists. The detection coils may include two detection coils, or may include at least three detection coils. The at least three detection coils may be further configured to eliminate a detection blind spot.
    Type: Grant
    Filed: March 23, 2021
    Date of Patent: May 10, 2022
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Mou He, Wei Chen, Yongfa Zhu, Shaojie Feng
  • Patent number: 11322987
    Abstract: An electric power transmission apparatus comprises a first antenna, a storage medium, and at least one first processor. The at least one first processor is configured to cause the first antenna to output a second radio wave for electric power supply in response to a request signal, when a first radio wave including the request signal is received from an electric power reception apparatus via the first antenna. The at least one first processor is configured to store information about an electric power transmission condition of the second radio wave transmitted in response to the request signal in the storage medium as history information. The at least one first processor is configured to cause the first antenna to output the second radio wave with the electric power transmission condition based on the history information, irrespective of whether or not the first radio wave has been received.
    Type: Grant
    Filed: July 26, 2019
    Date of Patent: May 3, 2022
    Assignee: KYOCERA CORPORATION
    Inventor: Masaki Nakao
  • Patent number: 11322979
    Abstract: The hydrosphere provides a natural wireless electric grid transporting energy through with a 7.5 Hz to 300 Hz bandpass. The hydrosphere grid eliminates the need for transmission lines and distribution lines operating at 50 Hz or 60 Hz worldwide. Global lightning return stroke current is sourced by the hydrosphere triggered by high voltage storm cloud conductivity. A power receiver extracts power from the Earth's hydrosphere, which serves as a current source for the power receiver. Water/moisture in the hydrosphere is conductive to ELF/SLF EM energy and functions as an electromagnetic spherical antenna that conducts broadband electromagnetic energy between 7.5 Hz and about 300 Hz. The power receiver comprises a resonant transformer that is electrically coupled to the earth's hydrosphere. The resonant transformer induces current flow from the Earth's hydrosphere. The power converts energy in ELF/SLF waves to useful form, e.g. 60 Hz AC or DC.
    Type: Grant
    Filed: December 2, 2020
    Date of Patent: May 3, 2022
    Assignee: EARTH ENERGIES, INC.
    Inventors: John Dinwiddie, Terry L. Wright
  • Patent number: 11322978
    Abstract: A method of energy harvester reconfiguration for a simultaneous wireless information and power transfer (SWIPT) receiver including receiving an input power from an RF signal, determining whether a Nblock-th energy block is activated based on a condition for operating the Nblock-th energy block having a maximum valid input power, among Nblock energy blocks each having a predetermined valid input power, in response to the Nblock-th energy block being determined activated, determining a number of energy harvesting circuits that are activated, among a plurality of energy harvesting circuits included in the Nblock-th energy block, based on power conversion efficiency, and reconfiguring power input in the Nblock-th energy block and the plurality of energy harvesting circuits included in the Nblock-th energy block, based on the determination and result of determination.
    Type: Grant
    Filed: October 1, 2020
    Date of Patent: May 3, 2022
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Dong In Kim, Jong Ho Moon, Jong Jin Park
  • Patent number: 11316384
    Abstract: The present specification provides a wireless power transmission device comprising: a power conversion unit configured so as to transmit, in a power transfer phase, wireless power generated on the basis of magnetic coupling to a wireless power receiving device; and a communication/control unit configured so as to perform an initial calibration for a power parameter prior to the power transfer phase, receive, from the wireless power receiving device, a first received power packet indicating the power received by the wireless power receiving device during the power transfer phase, and detect a foreign object by using the received power and a first power loss determined on the basis of the initial calibration.
    Type: Grant
    Filed: October 19, 2020
    Date of Patent: April 26, 2022
    Assignee: LG ELECTRONICS INC.
    Inventor: Yongcheol Park
  • Patent number: 11316375
    Abstract: Described herein are active rectification methods and systems for a rectifier of a wireless power system. Exemplary methods can include detecting, by a zero-crossing detector, one or more zero-crossings of a current at an input of the rectifier and determining a first delay time based on at least one wireless power system parameter and the zero-crossings. The methods can include generating first and second control signals for first and second switches of the rectifier, respectively, based on the first delay time; inserting a first dead time between the first control signal and the second control signal; and providing the first and second control signals to the first and second switches, respectively.
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: April 26, 2022
    Assignee: WITRICITY CORPORATION
    Inventor: Milisav Danilovic
  • Patent number: 11316383
    Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. The wireless power transmitting device uses a wireless power transmitting coil to transmit wireless power signals to the wireless power receiving device during wireless power transmission periods. During alternating foreign object detection periods, the wireless power transmitting device gathers signals from the wireless power transmitting coil to detect foreign objects. Another wireless power transmitting device may transmit signals that can cause interference. To help reduce interference, the wireless power transmitting device gathers signals with a sensing coil that is separate from the wireless power transmitting coil and subtracts these signals from signals gathered with the wireless power transmitting coil. A signal quality metric may be used in adjusting the timing of the foreign object detection periods to help avoid interference from the other wireless power transmitting device.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: April 26, 2022
    Assignee: Apple Inc.
    Inventor: Stephen C. Terry
  • Patent number: 11316382
    Abstract: A power feeding apparatus is provided. The power feeding apparatus includes a power feeding unit configured to supply electric power to a power receiving apparatus through a magnetic field; a measuring unit configured to measure an electric characteristic value and to generate a measurement value; a power receiving unit configured to provide a set value; and a foreign substance detection unit configured to detect a foreign substance in the magnetic field based on the set value and the measurement value. A power receiving apparatus, a power feeding system, and a method of controlling power feeding are also provided.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: April 26, 2022
    Assignee: Sony Group Corporation
    Inventors: Hiroaki Nakano, Toru Terashima, Keigo Bunsen, Osamu Kozakai, Kenichi Fujimaki
  • Patent number: 11316386
    Abstract: A communication method for wireless charging includes: transmitting a data packet to a wireless power transmitting device by in-band communication, if emergency data needs to be transmitted during a wireless charging process; and transmitting the data packet to the wireless power transmitting device by out-of-band communication, if non-emergency data needs to be transmitted during the wireless charging process; wherein a requirement for a transmission delay of the emergency data is higher than a requirement for a transmission delay of the non-emergency data.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: April 26, 2022
    Assignee: Beijing Xiaomi Mobile Software Co., Ltd.
    Inventors: Kaiqi Wu, Yanteng Wang
  • Patent number: 11316374
    Abstract: In described examples, an apparatus includes: at least one resonant circuit for receiving a radio frequency signal; a rectifier coupled to the resonant circuit to output a first rectified signal with a constant level portion and a portion matching a first portion of the radio frequency signal, and to output a second rectified signal having a constant level portion and a portion that matches a second portion of the radio frequency signal; a first limiter circuit to limit a voltage of the first rectified signal to a predetermined maximum voltage level; a second limiter circuit to limit the voltage of the second rectified signal to the predetermined maximum voltage level; a third limiter circuit to limit a voltage of the first rectified signal to a predetermined minimum voltage level; and a fourth limiter circuit to limit the voltage of the second rectified signal to the predetermined minimum voltage level.
    Type: Grant
    Filed: June 11, 2020
    Date of Patent: April 26, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Ernst Georg Muellner
  • Patent number: 11309742
    Abstract: Wireless charging methods and systems are provided for detecting foreign material by measuring a Q-factor based on a predefined packet and a transmission sequence while a wireless charging transmission device transmits power. An electronic device includes a battery; a coil; a wireless charging reception circuit; a power management module configured to control a charging state of the battery using a voltage supplied from the wireless charging reception circuit; and a processor configured to receive power from a wireless charging transmission device through the coil, determine whether a predetermined condition is satisfied while the battery is charged using the received power, and transmit a foreign material detection request packet to the wireless charging transmission device in response to determining that the predetermined condition is satisfied.
    Type: Grant
    Filed: January 4, 2021
    Date of Patent: April 19, 2022
    Inventors: Wooram Lee, Seho Park, Mingi Song
  • Patent number: 11309739
    Abstract: A wireless power transmission apparatus includes resonators configured to transmit a power wirelessly to another resonator, and a controller configured to control a current magnitude and/or a voltage magnitude of a power to be provided to each of the resonators. The apparatus further includes a feeder configured to provide the power to each of the resonators.
    Type: Grant
    Filed: May 14, 2019
    Date of Patent: April 19, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Keum Su Song, Sang Wook Kwon, Ki Young Kim, Yun Kwon Park, Jae Hyun Park, Chi Hyung Ahn, Young Ho Ryu
  • Patent number: 11309125
    Abstract: A power transmission unit includes: a power transmission coil; a communication coupler that is formed in an annular shape about an axis X and arranged to surround the power transmission coil; and a shielding member that is formed in an annular shape about the axis X, and arranged between the power transmission coil and the communication coupler in an intersecting direction. The shielding member is arranged at a position along the intersecting direction to surround the power transmission coil, and shields magnetic force generated by the power transmission coil.
    Type: Grant
    Filed: May 21, 2018
    Date of Patent: April 19, 2022
    Assignee: YAZAKI CORPORATION
    Inventors: Ryohei Nishizaki, Takashi Shiroki, Takahiro Nakahara, Takayuki Ueda
  • Patent number: 11309740
    Abstract: Methods and systems for a complementary metal oxide semiconductor wireless power receiver may include a receiver chip with an inductor, a configurable capacitance, and a rectifier. The method may include receiving an RF signal utilizing the inductor, extracting a clock signal from the received RF signal, generating a DC voltage utilizing a rectifier circuit, sampling the DC voltage, and adjusting the configurable capacitance based on the sampled DC voltage. The rectifier circuit may include CMOS transistors and T-gate switches for coupling to the inductor. The T-gate switches may be controlled by the generated DC voltage. A signed based gradient-descent algorithm may be utilized to maximize the DC voltage. The DC voltage may be sampled utilizing a comparator powered by the DC voltage, which may adaptively configure the capacitance. The inductor may be shielded utilizing a floating shield. The DC voltage may be increased utilizing a voltage-boosting rectifier.
    Type: Grant
    Filed: November 2, 2020
    Date of Patent: April 19, 2022
    Inventors: Meysam Zargham, Glenn Gulak
  • Patent number: 11303162
    Abstract: In one embodiment, a wireless power transfer system comprises a transmitter coil structure comprising a first transmitter coil, and a second transmitter coil coupled to the first transmitter coil in such a way that when a first current flows in the first transmitter coil in a first spatial direction the first current flows in the second transmitter coil in a second spatial direction different from the first spatial direction, a foreign object sensor coil structure comprising a first sensor coil having a central axis in common with the first transmitter coil, and a second sensor coil coupled in series to the first sensor coil, the second sensor coil having a central axis in common with the second transmitter coil, the first sensor coil coupled to the second sensor coil in such a way that when a first voltage induced in the first sensor coil has a first polarity a second voltage induced in the second sensor coil has a second polarity different from the first polarity, a voltage detector coupled to the foreign o
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: April 12, 2022
    Assignee: ChargEdge, Inc.
    Inventor: Sanjaya Maniktala
  • Patent number: 11303154
    Abstract: According to some embodiments, a magnetic secured transmission (MST) driver is provided. The MST driver includes a full-bridge switching circuit that includes a first half-bridge coupled to a first node and a second half-bridge coupled to a second node; and a control circuit coupled to drive the first half-bridge according to MST input data and to drive the second half bridge according to a high-frequency pulse width modulation (PWM) signal.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: April 12, 2022
    Assignee: Integrated Device Technology, Inc.
    Inventors: Tao Qi, Gustavo Mehas, Rui Liu
  • Patent number: 11303325
    Abstract: A non-contact power supply system is provided employing an electric power transmitting device which can improve the transmission efficiency of electric power, suppressing the circuit scale. The electric power transmitting device is configured with a resonance circuit including a resonance capacity and a resonance coil acting as a transmitting antenna, and a first coil arranged magnetically coupled with the resonance coil. The electric power transmitting device transmits electric power in a non-contact manner using resonant coupling of the resonance circuit. When transmitting the electric power, the electric power transmitting device controls the first coil to connect or disconnect both ends thereof so as to bring a resonance frequency of the resonance circuit close to a frequency of an electric power transmission signal outputted as the electric power to be transmitted.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: April 12, 2022
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventor: Katsuei Ichikawa
  • Patent number: 11303157
    Abstract: A power transmitting device is configured to perform a “power transmission frequency adjustment control” applied to adjust a power transmission frequency representing a frequency of power to be transmitted. A power receiving device is configured to perform a “resonance frequency adjustment control” applied to adjust a resonance frequency of a power receiving unit contactlessly receiving the power transmitted from the power transmitting device. The power transmitting device uses control information received from the power receiving device to determine whether the power receiving device has a function of performing the resonance frequency adjustment control applied to adjust the resonance frequency of the power receiving unit. When the power receiving device has the function of performing the resonance frequency adjustment control, the power transmitting device selects one of the power transmission frequency adjustment control and the resonance frequency adjustment control that has a higher resolution.
    Type: Grant
    Filed: October 1, 2020
    Date of Patent: April 12, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Takahiro Misawa
  • Patent number: 11296559
    Abstract: Provided are an apparatus and method for performing foreign object detection in a wireless power transfer system. The present specification discloses a method comprising receiving a digital ping from the wireless power transmitter; transmitting an identification and configuration packets to the wireless power transmitter; transmitting a foreign object detection (FOD) state packet which indicates a reference Q factor of the wireless power receiver to the wireless power transmitter; and receiving wireless power through magnetic coupling from the wireless power transmitter based on the foreign object detection result of the wireless power transmitter using the reference Q factor. Irrespective of individual characteristics of a wireless power receiver, accuracy and reliability of detecting a foreign object may be improved.
    Type: Grant
    Filed: March 30, 2021
    Date of Patent: April 5, 2022
    Assignee: LG ELECTRONICS INC.
    Inventors: Kyunghwan Kim, Yongcheol Park, Jihyun Lee, Gyunghwan Yook
  • Patent number: 11296555
    Abstract: A power transmission system including a light output apparatus and a light receiving apparatus is provided. The light output apparatus includes a plurality of light sources having different wavelengths, and a light output control unit configured to control light outputs of the plurality of light sources, and the light receiving apparatus includes a photoelectric conversion element configured to absorb light beams emitted from the plurality of light sources, and convert the absorbed light beams into electrical power. The light output control unit individually sets each of the light outputs of the plurality of light sources.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: April 5, 2022
    Assignee: Ricoh Company, Ltd.
    Inventor: Shunichi Sato
  • Patent number: 11296554
    Abstract: An apparatus, system, and method directed to the charging of electronic devices, and in particular to the wireless charging of battery enabled devices using FM band signals.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: April 5, 2022
    Assignee: Antenum, Inc.
    Inventors: James D. Logan, John T. Apostolos, William Mouyos, Jeffrey Logan
  • Patent number: 11289268
    Abstract: A transmission coil used in a wireless power transmitter includes a first coil, a second coil electrically connected in series with the first coil, and a tap provided at a connection node of the first coil and the second coil, the first coil and the second coil being stacked to at least partially overlap with each other. A transmission antenna includes the transmission coil, a first capacitor and a second capacitor connected in series with the transmission coil, and a switch provided in parallel to a series connection circuit of the second coil of the transmission coil and the second capacitor. A wireless power transmitter includes the transmission antenna and a bridge circuit that drives the transmission antenna. A charger includes the wireless power transmitter.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: March 29, 2022
    Assignee: ROHM CO., LTD.
    Inventor: Daisuke Uchimoto
  • Patent number: 11290027
    Abstract: A wireless charging receiver circuit includes a first bridge arm unit connected to the first node and a common ground node, a second bridge arm unit connected to the second node and the common ground node, a first voltage converter unit connected to the second node and the common ground node, a second voltage converter unit connected to the first node and a common ground node, a filter circuit, a bias power supply circuit, and a control unit configure to control the switch transistors, such that the voltage output terminals of the first voltage converter unit and the second voltage converter unit output a voltage signal.
    Type: Grant
    Filed: August 24, 2021
    Date of Patent: March 29, 2022
    Assignee: Halo Microelectronics Co., Ltd.
    Inventors: Shuang Han, Rui Liu, Songnan Yang