Patents by Inventor Si-hyun Lee

Si-hyun Lee 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).

  • Publication number: 20240131535
    Abstract: The present invention provides a linear evaporation source which receives heat from a crucible such that heat is uniformly distributed while a uniform heat distribution cover is seated on an accommodation case. The provided linear evaporation source includes an accommodation case forming an accommodation space with an open upper side, a crucible accommodated in the accommodation space and configured to discharge a deposition material, and a uniform heat distribution cover configured to cover the accommodation case to uniformly distribute a temperature by receiving heat from the crucible.
    Type: Application
    Filed: June 22, 2023
    Publication date: April 25, 2024
    Applicant: SVMTECH CO., LTD.
    Inventors: Ki Su Kim, Si Hyun Lee
  • Publication number: 20240127757
    Abstract: A power management driver and a display device having the power management driver are provided, including a first power supply configured to supply a first voltage to a first driving power terminal of a pixel through a power line during a sensing period, and supply a second voltage to the first driving power terminal of the pixel through the power line during a display period; a controller configured to control timing at which the first voltage is output and timing at which the second voltage is output during a transition period between the display period and the sensing period in response to a sensing control signal; and a fault detector configured to detect a fault in the power line based on a current flowing through an output terminal during the sensing period.
    Type: Application
    Filed: December 27, 2023
    Publication date: April 18, 2024
    Inventors: Dae Sik LEE, Si Duk SUNG, Sang Hyun LEE
  • Publication number: 20240097095
    Abstract: The present disclosure relates to a cathode material, a manufacturing method thereof, and a secondary battery including the same. In one embodiment, the cathode material includes a lithium metal oxide, and a coating layer formed on the surface of the lithium metal oxide and having a gas barrier property.
    Type: Application
    Filed: September 19, 2023
    Publication date: March 21, 2024
    Applicant: LEMON ENERGY Inc.
    Inventors: Si Hyun LEE, Jin Suk LEE
  • Publication number: 20240071292
    Abstract: A display device includes: a display panel; a driving voltage generator; a power voltage generator; an input voltage generator; and a timing controller. The display panel is provided with a pixel configured to emit light by using a driving voltage. The driving voltage generator is configured to supply the driving voltage to the pixel. The power voltage generator is configured to generate power voltages for driving of the display panel by using an input voltage, and generating an input voltage sensing value by sensing the input voltage. The input voltage generator is configured to supply the input voltage to the power voltage generator. The timing controller is configured to control an operation of at least one of the driving voltage generator, the power voltage generator, and the input voltage generator according to the input voltage sensing value.
    Type: Application
    Filed: February 21, 2023
    Publication date: February 29, 2024
    Inventors: Keun Oh KANG, Dae Sik Lee, Si Duk Sung, Sang Hyun Lee, Song Yi Han
  • Publication number: 20230238517
    Abstract: A bilayer-structured silicon carbon composite anode material, a method of preparing the same, and a secondary battery including the same is provided. The method of preparing the anode material includes: drying a first mixture including graphite balls, a nano-silicon slurry, pitch, and flake graphite to prepare a dried product; sintering the dried product to prepare a sintered product including a hard coating layer formed on an outermost surface thereof and containing amorphous hard carbon; mixing the sintered product with a carbon precursor, followed by heat treatment to form a soft coating layer on an outer circumferential surface of the sintered product; and forming a carbon nanotube layer on an outer circumferential surface of the soft coating layer.
    Type: Application
    Filed: January 24, 2023
    Publication date: July 27, 2023
    Inventor: Si Hyun Lee
  • Patent number: 11173988
    Abstract: The present invention relate to a water floating-type solar photovoltaic power generator, and more particularly, to a water floating-type solar photovoltaic power generator which is easy to be manufactured by using a plurality of annular floating bodies; is economical; and is further favorable to rotation, the plurality of annular floating bodies consisting of synthetic pipes and being arranged to form a concentric circle on the basis of a main pillar, as a floating source for supporting solar photovoltaic generation equipment on the water.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: November 16, 2021
    Assignee: BK ENERGY CO., LTD.
    Inventors: Heang Woo Lee, Byeong Woo Lee, Jae Sang Lee, Jae An Lee, Do Hyun Lee, Si Hyun Lee, Chang Jo Lee, Ju Hee Lee
  • Publication number: 20180314519
    Abstract: Disclosed herein is a method for analysis of change in software including inputting data containing two different source codes, analyzing the input data by a change type based on a database schema including syntax information, and outputting an analysis result for each change type. An apparatus for analyzing impact of change in software includes an input unit configured to input data containing two different source codes, a software change impact analyzer configured to analyze the input data by a change type based on a database schema including syntax information, and a report generation unit configured to outputting an analysis result for each change type.
    Type: Application
    Filed: November 27, 2017
    Publication date: November 1, 2018
    Inventors: Si Hyun LEE, Se Young PARK
  • Patent number: 9879194
    Abstract: Provided is a method of economically modifying low rank coal (LRC) to be high grade coal having minimized water re-absorption and minimized spontaneous ignition possibility while saving energy by coating heavy oil directly on coal without using solvent oil. Provides is a method of modifying coal using palm oil residue, including milling the coal, homogenously mixing the palm oil residue with the milled coal, melting the palm oil residue mixed with the coal so as to be coated on a surface of the coal, and simultaneously drying moisture in the coal, cooling the dried coal, and briquetting the cooled coal.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: January 30, 2018
    Assignee: Korea Institute of Energy Research
    Inventors: Si-Hyun Lee, Nam-Sun Nho, Seung-Hyun Moon, Sang-Do Kim, Dong-Hyuk Chun, Young-Jun Rhim, Jeong-Hwan Lim, Ho-Kyung Choi, Ji-Ho Yoo, Young-Chan Choi, Dong-Wook Lee, In-Soo Ryu, Seung-Jae Lee, Je Kyoung Woo
  • Publication number: 20180015989
    Abstract: The present invention relate to a water floating-type solar photovoltaic power generator, and more particularly, to a water floating-type solar photovoltaic power generator which is easy to be manufactured by using a plurality of annular floating bodies; is economical; and is further favorable to rotation, the plurality of annular floating bodies consisting of synthetic pipes and being arranged to form a concentric circle on the basis of a main pillar, as a floating source for supporting solar photovoltaic generation equipment on the water.
    Type: Application
    Filed: December 29, 2015
    Publication date: January 18, 2018
    Applicant: BK ENERGY CO., LTD.
    Inventors: Heang Woo LEE, Byeong Woo LEE, Jae Sang LEE, Jae An LEE, Do Hyun LEE, Si Hyun LEE, Chang Jo LEE, Ju Hee LEE
  • Publication number: 20170344984
    Abstract: A card payment system using body information and its method. A card reader, a user terminal unit and a server are connected via a communication network, cryptogram search keys and password keys are received from the user terminal unit to the server, a card information cryptogram table and a cryptogram search key table are generated. Also, the card payment system, if the first body information of a IC card and the second body information of a user of the IC card are same, checks if a card information cryptogram which is generated from the IC card's card information and the card information cryptogram cryptogram table which is stored in the server are same. Thus, the card payment system using body information can process a payment without decryption of the encrypted card information cryptogram.
    Type: Application
    Filed: November 18, 2016
    Publication date: November 30, 2017
    Applicant: JINI CO., LTD
    Inventors: Hye Jin JEONG, Si Hyun LEE
  • Patent number: 9012107
    Abstract: The cathode catalyst for a fuel cell includes an RuSe alloy having an average particle size of less than or equal to 6 nm. The cathode catalyst may also include a metal carbide. The RuSe alloy is a highly active amorphous catalyst.
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: April 21, 2015
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Alexey Alexandrovichserov, Chan Kwak, Ho-Jin Kweon, Si-Hyun Lee
  • Publication number: 20140366431
    Abstract: Provided is a method of economically modifying low rank coal (LRC) to be high grade coal having minimized water re-absorption and minimized spontaneous ignition possibility while saving energy by coating heavy oil directly on coal without using solvent oil. Provides is a method of modifying coal using palm oil residue, including milling the coal, homogenously mixing the palm oil residue with the milled coal, melting the palm oil residue mixed with the coal so as to be coated on a surface of the coal, and simultaneously drying moisture in the coal, cooling the dried coal, and briquetting the cooled coal.
    Type: Application
    Filed: September 28, 2012
    Publication date: December 18, 2014
    Applicant: Korea Institute of Energy Research
    Inventors: Si-Hyun Lee, Nam-Sun Nho, Seung-Hyun Moon, Sang-Do Kim, Dong-Hyuk Chun, Young-Jun Rhim, Jeong-Hwan Lim, Ho-Kyung Choi, Ji-Ho Yoo, Young-Chan Choi, Dong-Wook Lee, In-Soo Ryu, Seung-Jae Lee, Je Kyoung Woo
  • Patent number: 8840806
    Abstract: Provided is an absorbent for capturing carbon dioxide. The absorbent may include an amino acid with multiple amine groups and an alkali-metal hydroxide mixed with the amino acid and thus, may increase an absorption capacity for carbon dioxide. When a sterically hindered effect is induced to the amino acid with multiple amine groups, the absorption capacity for carbon dioxide may increase and heat of absorption reaction may decrease and thus, energy consumed for regeneration of an absorbent may be reduced. The absorbent for capturing carbon dioxide may include amino acid with multiple amine groups and the metal hydroxide, and may provide a functional group around the amine groups to cause an sterically hindered effect and thus, the absorption capacity for carbon dioxide and an carbon dioxide absorption rate may increase, and the capital cost for a carbon dioxide capturing process and an operating cost may be significantly reduced.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: September 23, 2014
    Assignee: Korea Institute of Energy Research
    Inventors: Soon Kwan Jeong, Sung Chan Nam, Si Hyun Lee, Sang Do Kim, Dong Hyuk Jeon, Yeo Il Yoon, Il Hyun Baek, Jin Ah Lim, Dae Hoon Kim
  • Patent number: 8726536
    Abstract: An apparatus for drying particles in a fluidized state includes a particle input segment into which wet particles are input, a drying segment having a multi-perforated plate dividing an inner space of the drying segment into an upper section and a lower section, a plurality of upper partition plates partitioning the upper section and positioned above the multi-perforated plate, a plurality of lower partition plates in the lower section respectively corresponding to the plurality of upper partition plates, a plurality of pairs of channel plates in the lower section that pass through the multi-perforated plate such that each pair of the plurality of pairs of channel plates are respectively arranged on opposite sides of respective ones of the plurality of upper partition plates and on opposite sides of respective ones of the plurality of lower partition plates; and a heated-air flow supply segment for supplying hot gas to the drying segment.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: May 20, 2014
    Assignee: Korea Institute of Energy Research
    Inventors: Do Won Shun, Chang Keun Yi, Gyong Tae Jin, Sung Ho Cho, Jae Hyeon Park, Dal Hee Bae, Ho Jung Ryu, Young Cheol Park, Seung Yong Lee, Si Hyun Lee
  • Patent number: 8685594
    Abstract: A cathode catalyst for a fuel cell includes a carrier, and an active material including M selected from the group consisting of Ru, Pt, Rh, and combinations thereof, and Ch selected from the group consisting of S, Se, Te, and combinations thereof, with the proviso that the active material is not RuSe when the carrier is C.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: April 1, 2014
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Alexey AlexandrovichSerov, Chan Kwak, Myoung-Ki Min, Si-Hyun Lee
  • Patent number: 8445162
    Abstract: A cathode catalyst includes a carrier including Mo, S, and I, and an active metal supported on the carrier and including a material selected from the group consisting of Ru, Pt, Rh, and combinations thereof. It is shown that such a catalyst for a cathode has improved activity over platinum catalysts.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: May 21, 2013
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Alexey Alexandrovichserov, Chan Kwak, Si-Hyun Lee
  • Patent number: 8323847
    Abstract: The cathode catalyst for a fuel cell of the present invention includes M-Co-Ch where M is at least one metal selected from the group consisting of Ru, Rh, Pd, Os, Ir, Pt, and combinations thereof, and Ch is at least one element selected from the group consisting of S, Se, Te, and combinations thereof. The cathode catalyst of the present invention has high activity and excellent selectivity for reduction of an oxidant, and is capable of improving performance of a membrane-electrode assembly for a fuel cell, a fuel cell system including the same, and a membrane-electrode assembly including the same.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: December 4, 2012
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Alexey Alexandrovichserov, Chan Kwak, Si-Hyun Lee
  • Patent number: 8318379
    Abstract: A membrane-electrode assembly for a mixed reactant fuel cell and a mixed reactant fuel cell system including the same. In one embodiment of the present invention, a membrane-electrode assembly for a mixed reactant fuel cell includes an anode catalyst layer, a cathode catalyst layer, a polymer electrolyte membrane disposed between the anode catalyst layer and the cathode catalyst layer, an electrode substrate disposed on at least one of the anode catalyst layer or the cathode catalyst layer, and an oxidant supply path penetrating the polymer electrolyte membrane, the anode catalyst layer, the cathode catalyst layer, and the electrode substrate and adapted to supply an oxidant.
    Type: Grant
    Filed: February 15, 2007
    Date of Patent: November 27, 2012
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Chan Kwak, Alexey AlexandrovichSerov, Myoung-Ki Min, Si-Hyun Lee
  • Patent number: 8257877
    Abstract: A stack for a mixed oxidant fuel cell and a mixed oxidant fuel cell system including the stack. The stack includes at least one membrane-electrode assembly that includes a polymer electrolyte membrane, an anode and a cathode disposed on opposite sides of the polymer electrolyte membrane, and an electrode substrate disposed on at least one of the anode or the cathode; and an oxidant supply path and a fuel supply path that penetrate the membrane-electrode assembly. The oxidant supply path has both ends open, and the fuel supply path has one end open and the other end closed. The stack of the present invention can improve fuel cell efficiency by smoothly supplying a fuel and an oxidant. Particularly, since the stack is configured to supply the fuel and the oxidant without using a pump, it can make a fuel cell small and light.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: September 4, 2012
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Chan Kwak, Alexey Alexandrovichserov, Jun-Won Suh, Si-Hyun Lee
  • Publication number: 20120153223
    Abstract: Provided is an absorbent for capturing carbon dioxide. The absorbent may include an amino acid with multiple amine groups and an alkali-metal hydroxide mixed with the amino acid and thus, may increase an absorption capacity for carbon dioxide. When a sterically hindered effect is induced to the amino acid with multiple amine groups, the absorption capacity for carbon dioxide may increase and heat of absorption reaction may decrease and thus, energy consumed for regeneration of an absorbent may be reduced. The absorbent for capturing carbon dioxide may include amino acid with multiple amine groups and the metal hydroxide, and may provide a functional group around the amine groups to cause an sterically hindered effect and thus, the absorption capacity for carbon dioxide and an carbon dioxide absorption rate may increase, and the capital cost for a carbon dioxide capturing process and an operating cost may be significantly reduced.
    Type: Application
    Filed: October 11, 2011
    Publication date: June 21, 2012
    Applicant: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Soon Kwan Jeong, Sung Chan Nam, Si Hyun Lee, Sang Do Kim, Dong Hyuk Jeon, Yeo Il Yoon, Il Hyun Baek, Jin Ah Lim, Dae Hoon Kim