Patents by Inventor Seung Hee Ryu

Seung Hee Ryu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10548211
    Abstract: Provided is a resonant network for plasma power supply, which is connected between a power supply unit and an output unit. The resonant network includes a resonant inductor connected in series with the power supply unit, a resonant capacitor connected in parallel with the output unit and connected in series with the resonant inductor, and a passive element connected in series with the output unit and the resonant inductor and connected in parallel with the resonant capacitor.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: January 28, 2020
    Assignees: NEW POWER PLASMA CO., LTD., RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVER
    Inventors: Seung Hee Ryu, Chang Seob Lim, Hong Kweon Moon, Won Yong Sung, Geun Wan Koo, Byoung Kuk Lee
  • Publication number: 20190357341
    Abstract: Provided is a resonant network for plasma power supply, which is connected between a power supply unit and an output unit. The resonant network includes a resonant inductor connected in series with the power supply unit, a resonant capacitor connected in parallel with the output unit and connected in series with the resonant inductor, and a passive element connected in series with the output unit and the resonant inductor and connected in parallel with the resonant capacitor.
    Type: Application
    Filed: September 20, 2018
    Publication date: November 21, 2019
    Inventors: Seung Hee RYU, Chang Seob LIM, Hong Kweon MOON, Won Yong SUNG, Geun Wan KOO, Byoung Kuk LEE
  • Patent number: 10276344
    Abstract: A power supply apparatus able to control an output current for maintaining plasma in a plasma generator includes: a switching power supply including a rectifier, an inverter, and a phase shifter; a plasma source connected to the switching power supply and generating the plasma in the plasma generator; a resonance network connected between the switching power supply and the plasma source and including a resonance inductor connected to a primary winding in series and a resonance capacitor connected to the plasma source in parallel and connected to the resonance inductor in series; and a control unit controlling the switching power supply in order to phase-shift a voltage and a current provided to the resonance network.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: April 30, 2019
    Assignee: NEW POWER PLASMA CO., LTD.
    Inventors: Won Yong Sung, Keun Wan Koo, Byoung Kuk Lee, Seung Hee Ryu, Chang Seob Lim, Hong Kweon Moon
  • Publication number: 20180247791
    Abstract: A power supply apparatus able to control an output current for maintaining plasma in a plasma generator includes: a switching power supply including a rectifier, an inverter, and a phase shifter; a plasma source connected to the switching power supply and generating the plasma in the plasma generator; a resonance network connected between the switching power supply and the plasma source and including a resonance inductor connected to a primary winding in series and a resonance capacitor connected to the plasma source in parallel and connected to the resonance inductor in series; and a control unit controlling the switching power supply in order to phase-shift a voltage and a current provided to the resonance network.
    Type: Application
    Filed: July 31, 2017
    Publication date: August 30, 2018
    Inventors: Won Yong SUNG, Keun Wan KOO, Byoung Kuk LEE, Seung Hee RYU, Chang Seob LIM, Hong Kweon MOON
  • Publication number: 20180247794
    Abstract: A power supply apparatus having a passive element for plasma ignition in a plasma generator includes: a switching power supply including a rectifier and an inverter; a transformer including a primary winding and a ferrite core around which the primary winding is wound; and a resonance network connected between the switching power supply and the primary winding and including a resonance inductor connected to the primary winding in series and a resonance capacitor connected to the primary winding in parallel and connected to the resonance inductor in series, wherein the resonance network includes the passive element having one end connected to the resonance capacitor in series and the other end connected to a ground, and magnitudes of a voltage and a current of the inverter are adjusted by the passive element.
    Type: Application
    Filed: July 31, 2017
    Publication date: August 30, 2018
    Inventors: Won Yong SUNG, Keun Wan KOO, Byoung Kuk LEE, Seung Hee RYU, Chang Seob LIM, Hong Kweon MOON
  • Publication number: 20140361979
    Abstract: A grip sensor device and a grip sensing method are provided. The grip sensor device includes an antenna that is formed of metal within a mobile electronic device and communicates a signal of a first frequency and a grip sensor module that is formed within the mobile electronic device, is electrically connected to the antenna, and outputs a proximity detection signal according to proximity of an external object to the antenna.
    Type: Application
    Filed: May 15, 2014
    Publication date: December 11, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Jeong WOO, Seung-Hee RYU, Hyun-Suk CHOI
  • Patent number: 8426781
    Abstract: Provided is an induction heater which induces an electric current in a metal utensil (e.g., a cooking utensil) using an electromagnetic force and can thus heat the metal utensil, and more particularly, an induction heater which can prevent electric devices sensitive to temperature from being overheated by forcefully blowing air to the front and the rear of an inverter circuit board. The induction heater is easy to be miniaturized, and a considerable number of devices can be integrated into the induction heater.
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: April 23, 2013
    Assignee: LG Electronics Inc.
    Inventors: Won Tae Kim, Seung Hee Ryu
  • Patent number: 8413455
    Abstract: An air conditioning system is provided. The air conditioning system allows coolant to selectively flow through a series of bypass pipes and valves connecting an outlet of a compressor and an outlet of an expansion member. The series of bypass pipes and valves allow a defrosting function to be performed without performing a reverse cycle.
    Type: Grant
    Filed: November 9, 2009
    Date of Patent: April 9, 2013
    Assignee: LG Electronics Inc.
    Inventors: Jae Hoon Sim, Deok Huh, Seung Hee Ryu, Seong Won Bae
  • Patent number: 8003924
    Abstract: A cooking appliance includes at least one heating element; a heat sink connected to the heating element, to radiate heat generated by the heating element; a cooling fan located at one side of the heat sink, to blow cooling air to the heat sink; and a flow guide covering at least a portion of the heat sink and guiding a portion of the cooling air to flow to the heating element.
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: August 23, 2011
    Assignee: LG Electronics Inc.
    Inventors: Won Tae Kim, Seung Hee Ryu, Byeong Wook Park
  • Publication number: 20100187222
    Abstract: Provided is an induction heater which induces an electric current in a metal utensil (e.g., a cooking utensil) using an electromagnetic force and can thus heat the metal utensil, and more particularly, an induction heater which can prevent electric devices sensitive to temperature from being overheated by forcefully blowing air to the front and the rear of an inverter circuit board. The induction heater is easy to be miniaturized, and a considerable number of devices can be integrated into the induction heater.
    Type: Application
    Filed: February 22, 2008
    Publication date: July 29, 2010
    Inventors: Won Tae Kim, Seung Hee Ryu
  • Publication number: 20100115976
    Abstract: An air conditioning system is provided. The air conditioning system allows coolant to selectively flow through a series of bypass pipes and valves connecting an outlet of a compressor and an outlet of an expansion member. The series of bypass pipes and valves allow a defrosting function to be performed without performing a reverse cycle.
    Type: Application
    Filed: November 9, 2009
    Publication date: May 13, 2010
    Inventors: Jae Hoon SIM, Deok Huh, Seung Hee Ryu, Seong Won Bae
  • Publication number: 20100044367
    Abstract: An induction heating device includes a main body, an induction coil provided in the main body and forming an electromagnetic field, and an induction coil driving circuit unit positioned in the main body to be physically and thermally separated from the induction coil.
    Type: Application
    Filed: August 21, 2008
    Publication date: February 25, 2010
    Applicant: LG Electronics Inc.
    Inventors: Won Tae KIM, Seung Hee Ryu, Byeong Wook Park
  • Publication number: 20090084777
    Abstract: An induction heater may comprise a base, a plurality of first solids of ferromagnetic or ferrimagnetic material and a first coil having a plurality of wire windings. The solids have a prescribed shape and are provided to have a prescribed arrangement on the base, and the first coil has a prescribed shape, and the first coil is provided over at least portions of the plurality of solids. A second coil may be provided within the first coil and spaced apart from the first coil. The second coil cross over at least portions of the plurality of first solids. A plurality of second solids of ferromagnetic or ferrimagnetic material may be formed parallel to each other, and contact at least one of the first solids. The induction heater may also include a plurality of third solids of ferromagnetic or ferrimagnetic material, a third coil having a plurality of wire windings and a fourth coil.
    Type: Application
    Filed: October 2, 2007
    Publication date: April 2, 2009
    Inventors: Doo Yong OH, Seung Hee Ryu, Byeong Wook Park
  • Patent number: 7390994
    Abstract: An electric cooker having a composite heat source includes an external case having an air inlet and an air outlet, a cooking plate mounted on an upper surface of the external case to be a top plate thereof, a heat generating unit mounted between the external case and the cooking plate, the heat generating unit including a work coil and an electric heater and arranged coaxially with the air inlet with respect to a center of the air inlet, a cooling unit coaxially arranged with respect to the center of the air inlet between the air inlet and the heat generating unit, the cooling unit cooling the heat generating unit, an air duct provided below the heat generating unit, and a reflector forming an outer cover of the electric heater.
    Type: Grant
    Filed: July 12, 2006
    Date of Patent: June 24, 2008
    Assignee: LG Electronics Inc.
    Inventors: Doo Yong Oh, Seung Jo Baek, Byeong Wook Park, Seung hee Ryu
  • Publication number: 20080142512
    Abstract: A cooking appliance includes at least one heating element; a heat sink connected to the heating element, to radiate heat generated by the heating element; a cooling fan located at one side of the heat sink, to blow cooling air to the heat sink; and a flow guide covering at least a portion of the heat sink and guiding a portion of the cooling air to flow to the heating element.
    Type: Application
    Filed: December 13, 2007
    Publication date: June 19, 2008
    Inventors: Won Tae KIM, Seung Hee Ryu, Byeong Wook Park
  • Patent number: 7385162
    Abstract: A heater unit comprises: a hot wire heating unit; an induction heating unit provided adjacent to the hot wire heating unit and operated by induction heating; and connectors each for connecting the hot wire heating unit to the induction heating unit. A cooker comprises: a casing; a heating plate provided on an upper surface of the casing; a hot wire heating unit provided on a bottom surface of the heating plate for generating heat according to application of an electric power; an induction heating unit provided on the bottom surface of the heating plate for being adjacent to the hot wire heating unit and operated by induction heating; connectors each for connecting the hot wire heating unit to the induction heating unit; and support members each provided on the bottom surface of the hot wire heating unit and for supporting the hot wire heating unit.
    Type: Grant
    Filed: June 23, 2006
    Date of Patent: June 10, 2008
    Assignee: LG Electronics Inc.
    Inventors: Seung hee Ryu, Jong Gwan Ryu, Eui Sung Kim, Doo Yong Oh, Byeong Wook Park
  • Patent number: 7368688
    Abstract: A heater unit is provided, the heater unit equipped with an induction heating coil and an electric heater selectively operated based on kind and state of a load of a cooking vessel placed on the heater unit. The kind is determined by an input current inputted when a load-type determination unit causes the induction heating coil to be operated and a resonance current flowing into the induction heating coil. The state is determined by a temperature change of the heater unit when a load-state determination unit allows the electric heater to generate heat, and the induction heating coil and the electric heater are selectively operated based on the determined kind and state of the load. Accordingly, a user needs not to scrupulously determine the kind of the cooking vessel and the electric cooker is not operated under a no-load state to prevent occurrence of safety accidents.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: May 6, 2008
    Assignee: LG Electronics Inc.
    Inventors: Eui Sung Kim, Seung hee Ryu, Doo Yong Oh, Byeong Wook Park
  • Patent number: 7282680
    Abstract: An apparatus for controlling an inverter circuit of an induction heat cooker which generates and outputs high voltage power to cook food contained in a cooking container is disclosed. The apparatus varies a pulse width of high level interval of a driving pulse according to a level of AC power supplied thereto to vary a switch current of the inverter circuit, and sufficiently secures a turn off time of the driving pulse in proportion to a resonant time varying according to states of separation of the cooking container or the heated food. Therefore, the apparatus improves stability of the switching operation and endurance. Also the apparatus requires relatively low manufacturing costs as the trigger generation is implemented with relatively low-priced amplifiers.
    Type: Grant
    Filed: October 4, 2004
    Date of Patent: October 16, 2007
    Assignee: LG Electronics Inc.
    Inventor: Seung Hee Ryu
  • Publication number: 20070131675
    Abstract: An electric cooker having a composite heat source comprising: an external case having an air inlet and an air outlet; a cooking plate on an upper surface of the external case to be a top plate; a heat generating unit including a work coil and/or an electric heater, mounted between the external case and the cooking plate for coaxial arrangement with the air inlet; and a heat radiation unit including a fan motor and air ducts, coaxially arranged between the air inlet and the heat generating unit, such that sufficient cooling effect can be achieved even with a small-sized blow fan of a small capacity. The manufacturing cost can be reduced, and an effective utilization of space for parts arrangement can be enhanced using the relatively small capacity of blowing fan, enabling to manufacture an electric cooker in a thin, light, simple and compact manner.
    Type: Application
    Filed: July 12, 2006
    Publication date: June 14, 2007
    Applicant: LG ELECTRONICS INC.
    Inventors: Doo Yong OH, Seung Jo BAEK, Byeong Wook PARK, Seung hee RYU
  • Publication number: 20070125766
    Abstract: A heater unit comprises: a hot wire heating unit; an induction heating unit provided adjacent to the hot wire heating unit and operated by induction heating; and connectors each for connecting the hot wire heating unit to the induction heating unit. A cooker comprises: a casing; a heating plate provided on an upper surface of the casing; a hot wire heating unit provided on a bottom surface of the heating plate for generating heat according to application of an electric power; an induction heating unit provided on the bottom surface of the heating plate for being adjacent to the hot wire heating unit and operated by induction heating; connectors each for connecting the hot wire heating unit to the induction heating unit; and support members each provided on the bottom surface of the hot wire heating unit and for supporting the hot wire heating unit.
    Type: Application
    Filed: June 23, 2006
    Publication date: June 7, 2007
    Applicant: LG ELECTRONICS INC.
    Inventors: Seung hee RYU, Jong Gwan RYU, Eui Sung KIM, Doo Yong OH, Byeong Wook PARK