Patents Assigned to WITS Co., Ltd.
  • Patent number: 11025094
    Abstract: A wireless power receiving device includes a first resonance circuit configured to have a first resonance frequency; a second resonance circuit configured to have a second resonance frequency lower than the first resonance frequency; and a rectifying circuit connected to the first resonance circuit and the second resonance circuit without a switch and configured to rectify power received through the first resonance circuit and the second resonance circuit.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: June 1, 2021
    Assignee: WITS Co., Ltd.
    Inventors: In Wha Jeong, Jae Suk Sung, Hugh Kim
  • Patent number: 10998613
    Abstract: A chip antenna includes a coil; and a core including a body portion around which the coil is wound and supporting portions disposed on both sides of the body portion, wherein the core includes a second groove formed in the supporting portions and accommodating an end portion of the coil.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: May 4, 2021
    Assignee: WITS Co., Ltd.
    Inventors: Sung Jun Park, Ha Ryong Hong, Sung Eun Cho
  • Patent number: 10965169
    Abstract: A wireless power transmitter includes: a power supply configured to supply a driving power; a first power transmitter including first bridge switching elements forming a first bridge circuit, and configured to receive the driving power to transmit a first power, wherein a magnitude of a first input voltage applied to the first bridge circuit is determined by a duty of at least one of the first bridge switching elements; a second power transmitter including second bridge switching elements forming a second bridge circuit, and configured to receive the driving power to transmit a second power, wherein a magnitude of a second input voltage applied to the second bridge circuit is determined by a duty of at least one of the second bridge switching elements; and a controller configured to output first and second power transmitting control signals respectively controlling the first bridge switching elements and the second bridge switching elements.
    Type: Grant
    Filed: June 19, 2018
    Date of Patent: March 30, 2021
    Assignee: WITS Co., Ltd.
    Inventors: Seung Won Park, Eun Young Shin, Byoung Woo Ryu, Hyo Young Kim, Yun Ki Hong, Young Seung Roh
  • Patent number: 10944291
    Abstract: A wireless power transmitter includes a converter comprising at least one switching element, and configured to generate boosted input power; a resonator and a controller. The resonator is configured to receive the boosted input power as an alternating current (AC) power, and transmit a ping signal in a detection mode for determining whether any one or both of an external object approaching and a type of the external object. The controller is configured to control the switching element, and gradually increase a duty cycle of a gate signal provided to the switching element, in the detection mode.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: March 9, 2021
    Assignee: WITS Co., Ltd.
    Inventors: Yun Ki Hong, Joung Ho Son, Keun Soo Ha, Dae Sik Kim, Eun Young Shin, Seung Won Park
  • Patent number: 10923822
    Abstract: A wireless communications antenna includes: a magnetic body including one or more slits formed therein; and a coil part having solenoid form and disposed around the magnetic body, wherein the one or more slits are configured such that the magnetic body is not disconnected and a magnetic path of the magnetic body is continuous.
    Type: Grant
    Filed: June 19, 2018
    Date of Patent: February 16, 2021
    Assignee: WITS Co., Ltd.
    Inventors: Tae Jun Choi, Jung Young Cho, Seung Hee Oh, Sung Nam Cho, Chang Hak Choi
  • Patent number: 10892647
    Abstract: A wireless power transmitter having a data transmission and reception capability is disclosed. The wireless power transmitter includes a main coil to transmit power, an inverter to apply an alternating current (AC) signal to the main coil, a communication module to output a transmission signal including transmission data to be wirelessly transmitted the wireless power transmitter, and/or receive a reception signal including received data wirelessly received by the wireless power transmitter, a first connecting circuitry to prevent a power signal of the main coil from being input to the communication module, and the auxiliary coil to connect to the main coil and connected to the first connecting circuitry. The main coil or the auxiliary coil may be configured to transmit the transmission data and receive the reception signal, and the auxiliary coil may be wiredly connected to the main coil or not wiredly connected to the main coil.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: January 12, 2021
    Assignee: WITS Co., Ltd.
    Inventors: Se Joo Kim, Jung Woo Choi, Tae Seok Ko, Byoung Woo Ryu
  • Patent number: 10886598
    Abstract: An antenna module includes: a coil part including an antenna wiring disposed on an insulating substrate; a first magnetic part disposed on a first surface of the insulating substrate; and a second magnetic part disposed on a second surface of the insulating substrate, wherein the first magnetic part and the second magnetic part overlap with each other on a center region of the antenna wiring.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: January 5, 2021
    Assignee: WITS Co., Ltd.
    Inventors: Hee Seung Kim, Ki Won Chang, Jae Sun Won, Chang Hee Lee, Hyo Jung Yoon
  • Patent number: 10886783
    Abstract: A wireless power transmission apparatus includes: an alternating current (AC) power output to convert input power into AC power and output the AC power; and a power transmitter including a plurality of resonators. The power transmitter receives the AC power and wirelessly transmits the AC power in a first operating mode in which two of the resonators are connected in series and the two resonators transmit the AC power, and in a second operating mode in which one of the resonators transmits the AC power.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: January 5, 2021
    Assignee: WITS Co., Ltd.
    Inventors: Se Joo Kim, Tae Seok Ko, Young Woon Choi, Joung Ho Son, Doo Young Song
  • Patent number: 10873216
    Abstract: A wireless power transmitter includes: a first power transmitting unit including first switching elements forming a first bridge circuit, and configured to receive input DC voltage and transmit a first power by switching operations of the first switching elements; and a second power transmitting unit including second switching elements forming a second bridge circuit, and configured to receive the input DC voltage and transmit second power by switching operations of the second switching elements. The first power transmitting unit steps-up the input DC voltage according to a duty ratio of one or more of the first switching elements, and applies the stepped-up input DC voltage to the first bridge circuit. The second power transmitting unit steps-up or steps-down the input DC voltage according to a duty ratio of one or more of the second switching elements, and applies the stepped-up or stepped-down input DC voltage to the second bridge circuit.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: December 22, 2020
    Assignee: WITS Co., Ltd.
    Inventors: Eun Young Shin, Hyo Young Kim, Seung Won Park, Byoung Woo Ryu, Young Seung Roh
  • Patent number: 10855116
    Abstract: A power transmitter includes: a first resonator configured to wirelessly supply power to a power receiver and having an impedance that changes in response to a foreign material being proximate to the power transmitter; a second resonator having an impedance that changes in response to the foreign material being proximate to the power receiver; and controller configured to select either one of the first resonator and the second resonator in response to a wireless charging control, and to determine whether the foreign material is proximate to the power transmitter, based on a change in the impedance of the selected one of the first resonator and the second resonator.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: December 1, 2020
    Assignee: WITS Co., Ltd.
    Inventors: Soon Tack Oh, Byoung Woo Ryu, Ji Hoon Kim, Young Seung Roh
  • Patent number: 10833539
    Abstract: A mobile terminal includes a communication controller configured to detect a wireless tag in a mobile environment and a wireless charging controller configured to receive power wirelessly, and control the communication controller to determine whether the wireless tag is in the mobile environment, in response to receiving a wake-up power signal from a wireless power transfer apparatus.
    Type: Grant
    Filed: June 21, 2018
    Date of Patent: November 10, 2020
    Assignee: WITS Co., Ltd.
    Inventors: Ji Hoon Kim, Tae Seok Ko, Dong Yeol Lee, Ju Hyoung Park, Sang Beom Lee
  • Patent number: 10790675
    Abstract: There are provided an apparatus for transmitting power wirelessly. The apparatus for transmitting power wirelessly may include a boosting unit boosting an input voltage, and an inverter unit inverting the boosted voltage output from the boosting unit to transmit power wirelessly. The inverter unit and the boosting unit are controlled by the same switching element.
    Type: Grant
    Filed: June 19, 2018
    Date of Patent: September 29, 2020
    Assignee: WITS Co., Ltd.
    Inventors: Sang Ho Cho, Chang Ik Kim, Seung Won Park, Yong Woon Park, Sang Beom Lee, Eun Young Shin, Jae Suk Sung, Jae Hyoung Cho
  • Patent number: 10778036
    Abstract: A wireless power transmitter includes: a current adjuster configured to convert an input power into a transmission current, which is periodically varied according to a transmission frequency; and a power transmitter configured to receive the transmission current and wirelessly transmit power according to the transmission frequency.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: September 15, 2020
    Assignee: WITS Co., Ltd.
    Inventor: In Wha Jeong
  • Patent number: 10749381
    Abstract: A wireless power transmission device including a resonant circuit magnetically coupled to a wireless power reception device and being configured to wirelessly transmit power, an alternating current (AC) generator including switches and being configured to receive a direct current (DC) voltage and to generate an AC current, according to a switching operation of the switches, to be supplied to the resonant circuit, and a variable capacitor connected to an output terminal of the AC generator and having a first capacitance, when a load state of the wireless power reception device is provided as a full load state and a second capacitance lower than the first capacitance, when the load state is provided as a light load state.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: August 18, 2020
    Assignee: WITS Co., Ltd.
    Inventors: Dong Woo Han, Byoung Woo Ryu, Hyo Young Kim, Se Joo Kim, Young Seung Roh
  • Patent number: 10748048
    Abstract: A coil module includes a substrate; an upper coil disposed on at least one surface of the substrate in an upper portion of the substrate; a lower coil disposed on at least one surface of the substrate in a lower portion of the substrate; and a lower outer pattern disposed on an outer side of the lower coil in the lower portion of the substrate and connected to either one or both of the upper coil and the lower coil.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: August 18, 2020
    Assignee: WITS Co., Ltd.
    Inventor: Jae Hyoung Cho
  • Patent number: 10734158
    Abstract: There are provided a coil device and an apparatus including the same. The coil device includes a first coil and a second coil. The first coil is configured to receive a first signal using a first magnetic field formed in a first direction. The second coil includes a shape different from the first coil and is configured to form a second magnetic field in a second direction, different from the first direction, to transmit a second signal, different from the first signal.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: August 4, 2020
    Assignee: WITS Co., Ltd.
    Inventors: Hee Seung Kim, Tae Sung Kim, Jae Sun Won, Jae Suk Sung
  • Patent number: 10727684
    Abstract: A wireless power transmitter includes a converter, a resonator, and a controller. The converter includes switching elements forming a bridge circuit, and is configured to output an alternating current (AC) voltage in response to control signals. The resonator includes a resonant capacitor and a resonant coil, and is configured to receive the AC voltage to wirelessly transmit power. The controller is configured to perform a first mode operation in which a duty of the control signals is fixed, a frequency of one of the control signals is varied and the control signals are output, and a second mode operation in which a frequency of the control signals is fixed, a duty of one of the control signals is reduced and the control signals are output.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: July 28, 2020
    Assignee: WITS Co., Ltd.
    Inventors: Jung Ho Son, Keun Soo Ha, Yun Ki Hong, Seung Won Park, Eun Young Shin, Dae Sik Kim
  • Patent number: 10718792
    Abstract: Provided is a multifunctional substrate inspection apparatus capable of selectively bringing probes into contact.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: July 21, 2020
    Assignee: WIT CO., LTD.
    Inventor: Masato Utsumi
  • Patent number: 10721687
    Abstract: There are provided an information transmitter and an apparatus including the same. The information transmitter includes a signal generator configured to output an information signal including pulses changed from a first state to a second state or a third state and subsequently changed from the second state or the third state to the first state. A time period in which some of the pulses are changed from the first state to the second state or the third state may be shorter than a time period in which some of the pulses are changed from the second state or the third state to the first state. The information transmitter also includes a transmitting coil configured to receive the information signal and generate a magnetic field based on the information signal.
    Type: Grant
    Filed: November 3, 2016
    Date of Patent: July 21, 2020
    Assignee: WITS Co., Ltd.
    Inventors: Hee Seung Kim, Jae Sun Won, Hugh Kim, Jae Suk Sung
  • Patent number: 10698455
    Abstract: An antenna module includes an insulating substrate; a first antenna wiring including a first spiral wiring disposed on the insulating substrate and having a first portion disposed adjacent to an edge of the insulating substrate, and a second spiral wiring disposed on the insulating substrate and spaced apart from the first spiral wiring; and a magnetic part disposed on one surface of the insulating substrate and disposed to overlap a second portion of the first spiral wiring that is adjacent to the second spiral wiring without overlapping the first portion of the first spiral wiring.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: June 30, 2020
    Assignee: WITS Co., Ltd.
    Inventors: Hyo Jung Yoon, Ki Won Chang, Chang Mok Han, Si Hyung Kim, Tae Heon Lee, Hyung Wook Cho, Taek Woo Kim, Sun Hee Lee, Dae Kyu Lee