Patents by Inventor Hyun-cheol Lee

Hyun-cheol 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).

  • Patent number: 9231273
    Abstract: Provided is a positive electrode active material for a lithium secondary battery including a positive electrode active material particle and an electrolyte-containing metal oxide coating layer having a porous structure and a method of manufacturing the same. A lithium secondary battery to which the positive electrode active material including the electrolyte-containing metal oxide coating layer is applied can have improved charge/discharge efficiency and lifespan characteristics at the same time.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: January 5, 2016
    Assignee: SAMSUNG SDI CO., LTD.
    Inventors: Hyun Cheol Lee, Woo Young Yang
  • Patent number: 9229360
    Abstract: An eletrophotographic image forming apparatus may include a developing unit; a toner buffer unit which feeds a toner to the developing unit, and includes an agitating member agitating the toner contained inside the toner buffer unit and a first carrying member carrying the toner contained inside the toner buffer unit to the developing unit; a toner cartridge which feeds the toner to the toner buffer unit, and includes a second carrying member carrying the toner contained inside the toner cartridge to the toner buffer unit; and a control unit which controls a first driving unit driving the second carrying member and a second driving unit driving the agitating member and the first carrying member, and the control unit includes a first feed mode, a second feed mode and a toner supplement mode.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: January 5, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyun-cheol Lee, Dae-ho Kim, Jin-hong Kim
  • Publication number: 20150262763
    Abstract: The present invention relates to a supercapacitor electrode material in which a transition metal oxide and a carbon-based material are combined, and particularly, to a supercapacitor electrode material which increases) the capacitance of a capacitor by increasing a specific surface area through the process of making pores of a transition metal oxide and then applying the transition metal oxide having the increased specific surface area, and to a method for manufacturing the supercapacitor electrode material. According to the present invention, the supercapacitor electrode material is manufactured by mixing and reacting a layered titanium oxide with a spherical titanium oxide to obtain a porous titanium oxide, and combining the porous titanium oxide with a carbon-based material.
    Type: Application
    Filed: September 30, 2013
    Publication date: September 17, 2015
    Applicant: SAMSUNG FINE CHEMICALS CO., LTD
    Inventors: Jin Hee Lee, Hyun Cheol Lee, Sang Mi Kim
  • Publication number: 20150194701
    Abstract: The present invention is intended to provide a gel-type solid electrolyte having flexibility while maintaining the advantages of an ionic liquid by effectively internalizing the ionic liquid into a porous metal oxide. To this end, the present invention provides the gel-type solid electrolyte which includes an ionic liquid in a porous metal oxide prepared from a silane compound represented by the following Chemical Formula 1: Si(R1)x(OR2)y(CR3?CR4R5)(4-x-y)??[Chemical Formula 1] in the Formula, R1 and R2 are alkyl groups with carbon numbers in the range of 1 to 3, which are independent from each other; R3, R4 and R5 are each independently hydrogen, a halogen element or an alkyl group having 1 to 5 carbon atoms; and x is an integer in the range of 0?x?3, y is an integer in the range of 1?y?4 and x+y is an integer in the range of 2?x+y?4.
    Type: Application
    Filed: September 30, 2013
    Publication date: July 9, 2015
    Applicant: SAMSUNG FINE CHEMICALS CO., LTD
    Inventors: Sang Mi Kim, Hyun Cheol Lee, Jin Hee Lee
  • Publication number: 20150117877
    Abstract: An eletrophotographic image forming apparatus may include a developing unit; a toner buffer unit which feeds a toner to the developing unit, and includes an agitating member agitating the toner contained inside the toner buffer unit and a first carrying member carrying the toner contained inside the toner buffer unit to the developing unit; a toner cartridge which feeds the toner to the toner buffer unit, and includes a second carrying member carrying the toner contained inside the toner cartridge to the toner buffer unit; and a control unit which controls a first driving unit driving the second carrying member and a second driving unit driving the agitating member and the first carrying member, and the control unit includes a first feed mode, a second feed mode and a toner supplement mode.
    Type: Application
    Filed: May 30, 2014
    Publication date: April 30, 2015
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Hyun-cheol LEE, Dae-ho Kim, Jin-hong Kim
  • Patent number: 8949064
    Abstract: Example embodiments relate to a measurement method of measuring lots with improved process efficiency. The measurement method may include calculating a measurement capability (indicating a degree to which members to be measured may be processed per unit time in a measurement device); allocating the measurement capability according to a processing device and a processing condition; and calculating a measurement ratio of the lots processed by the processing device and the processing condition.
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: February 3, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyun-cheol Lee, In-kap Chang, Seung-hoon Tong
  • Publication number: 20140057181
    Abstract: Provided is a positive electrode active material for a lithium secondary battery including a positive electrode active material particle and an electrolyte-containing metal oxide coating layer having a porous structure and a method of manufacturing the same. A lithium secondary battery to which the positive electrode active material including the electrolyte-containing metal oxide coating layer is applied can have improved charge/discharge efficiency and lifespan characteristics at the same time.
    Type: Application
    Filed: December 27, 2012
    Publication date: February 27, 2014
    Applicant: SAMSUNG FINE CHEMICALS CO., LTD
    Inventors: Hyun Cheol Lee, Woo Young Yang
  • Patent number: 8583013
    Abstract: A developing unit of an image forming apparatus includes a developer cartridge detachably mounted on the developing unit, a developing case in which a developing member and a first supply member are provided, a developer supply passage to supply a developer stored in the developer cartridge to the developing case, and a developer supplement unit mounted in a portion connecting the developing case and the developer supply passage, to agitate the developer supplied through the developer supply passage and to supply the agitated developer to the developing case.
    Type: Grant
    Filed: October 17, 2011
    Date of Patent: November 12, 2013
    Assignee: SAMSUNG Electronics Co., Ltd.
    Inventors: Ji-won Moon, Hyun-cheol Lee, Yun-kyu Sim
  • Publication number: 20120101619
    Abstract: Example embodiments relate to a measurement method of measuring lots with improved process efficiency. The measurement method may include calculating a measurement capability (indicating a degree to which members to be measured may be processed per unit time in a measurement device); allocating the measurement capability according to a processing device and a processing condition; and calculating a measurement ratio of the lots processed by the processing device and the processing condition.
    Type: Application
    Filed: July 14, 2011
    Publication date: April 26, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyun-cheol Lee, In-kap Chang, Seung-hoon Tong
  • Publication number: 20120039636
    Abstract: A developing unit of an image forming apparatus includes a developer cartridge detachably mounted on the developing unit, a developing case in which a developing member and a first supply member are provided, a developer supply passage to supply a developer stored in the developer cartridge to the developing case, and a developer supplement unit mounted in a portion connecting the developing case and the developer supply passage, to agitate the developer supplied through the developer supply passage and to supply the agitated developer to the developing case.
    Type: Application
    Filed: October 17, 2011
    Publication date: February 16, 2012
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Ji-won Moon, Hyun-cheol Lee, Yun-kyu Sim
  • Patent number: 8073366
    Abstract: A developing unit of an image forming apparatus includes a developer cartridge detachably mounted on the developing unit, a developing case in which a developing member and a first supply member are provided, a developer supply passage to supply a developer stored in the developer cartridge to the developing case, and a developer supplement unit mounted in a portion connecting the developing case and the developer supply passage, to agitate the developer supplied through the developer supply passage and to supply the agitated developer to the developing case.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: December 6, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ji-won Moon, Hyun-cheol Lee, Yun-kyu Sim
  • Publication number: 20110076064
    Abstract: A developing unit of an image forming apparatus includes a developer cartridge detachably mounted on the developing unit, a developing case in which a developing member and a first supply member are provided, a developer supply passage to supply a developer stored in the developer cartridge to the developing case, and a developer supplement unit mounted in a portion connecting the developing case and the developer supply passage, to agitate the developer supplied through the developer supply passage and to supply the agitated developer to the developing case.
    Type: Application
    Filed: December 9, 2010
    Publication date: March 31, 2011
    Applicant: Samsung Electronics Co., Ltd
    Inventors: Ji-won MOON, Hyun-cheol Lee, Yun-kyu Sim
  • Patent number: 7873305
    Abstract: A developing unit of an image forming apparatus includes a developer cartridge detachably mounted on the developing unit, a developing case in which a developing member and a first supply member are provided, a developer supply passage to supply a developer stored in the developer cartridge to the developing case, and a developer supplement unit mounted in a portion connecting the developing case and the developer supply passage, to agitate the developer supplied through the developer supply passage and to supply the agitated developer to the developing case.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: January 18, 2011
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Ji-won Moon, Hyun-cheol Lee, Yun-kyu Sim
  • Patent number: 7761038
    Abstract: An image forming apparatus includes a developing unit which comprises a unit casing to form a developing chamber, and a rotating body which is rotatably provided in the developing chamber, a developer supplying unit to store a developer therein, and comprises a plurality of developer outlets which are overlapped or in contact with each other along a rotation direction of the rotating body on an outside surface thereof.
    Type: Grant
    Filed: January 16, 2008
    Date of Patent: July 20, 2010
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Ji-won Moon, Hyun-cheol Lee
  • Patent number: 7702259
    Abstract: Provided are a multi-pass image forming apparatus and an image forming method using the same. The multi-pass image forming apparatus includes a plurality of developers for forming a plurality of electrostatic latent images using toners having different polarities and colors in one development process and for forming a multi-color image in at least two development processes; an exposure unit for forming the plurality of the electrostatic latent images on a photosensitive medium; and an intermediate transferring unit for having a toner images transferred thereon from the photosensitive medium that overlap to form the multi-color image, wherein the toner image may overlap another toner image on the intermediate transferring unit.
    Type: Grant
    Filed: May 26, 2006
    Date of Patent: April 20, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jong-moon Eun, Hisao Okada, Hyun-cheol Lee, Won Choe, Hyun-wook Bae, Won-wook Lee, So-won Sheen, In-cheol Jeon
  • Publication number: 20080306621
    Abstract: A semiconductor manufacturing apparatus control system and a statistical process control method thereof increase reliability. A semiconductor manufacturing apparatus control system includes a plurality of unit process devices for performing various semiconductor unit processes; a plurality of measuring devices for measuring a pattern characteristic of wafer completed in respective unit processes in the plurality of unit process devices; and a host computer for sensing an abnormal state of the unit process by using a T2 statistic computed by a plurality of process variables corresponding to the pattern characteristic of the wafer measured in the plurality of measuring devices, thereby realizing a monitoring of all unit processes including a measuring process to which a skip rule is applied, and thus enhancing reliability.
    Type: Application
    Filed: June 5, 2008
    Publication date: December 11, 2008
    Inventors: Sang-Wook Choi, Seung-Hoon Tong, Hyung-Sun Kim, Hyun-Cheol Lee, Ho-Young Lee
  • Publication number: 20080292363
    Abstract: A developing unit of an image forming apparatus includes a developer cartridge detachably mounted on the developing unit, a developing case in which a developing member and a first supply member are provided, a developer supply passage to supply a developer stored in the developer cartridge to the developing case, and a developer supplement unit mounted in a portion connecting the developing case and the developer supply passage, to agitate the developer supplied through the developer supply passage and to supply the agitated developer to the developing case.
    Type: Application
    Filed: October 18, 2007
    Publication date: November 27, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Ji-won MOON, Hyun-cheol LEE, Yun-kyu SIM
  • Publication number: 20080193168
    Abstract: An image forming apparatus includes a developing unit which comprises a unit casing to form a developing chamber, and a rotating body which is rotatably provided in the developing chamber, a developer supplying unit to store a developer therein, and comprises a plurality of developer outlets which are overlapped or in contact with each other along a rotation direction of the rotating body on an outside surface thereof.
    Type: Application
    Filed: January 16, 2008
    Publication date: August 14, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Ji-won MOON, Hyun-cheol Lee
  • Publication number: 20080115832
    Abstract: A polymer electrolyte using titania nanotubes (TiNTs) is disclosed. The polymer electrolyte is prepared by crosslinking titania nanotubes with a conductive polymeric material and adding an iodine-based solution thereto. Further disclosed is a dye-sensitized solar cell using the polymer electrolyte.
    Type: Application
    Filed: September 17, 2007
    Publication date: May 22, 2008
    Inventors: O-Bong YANG, Hyun-Cheol Lee, Ji-Min Chun, M. Shaheer Akhtar, Chae-Woung Cho
  • Patent number: 7372762
    Abstract: The present invention is related to a semiconductor memory device improving refresh performance by reliably generating an internal voltage. The internal voltage generator for use in the semiconductor memory device includes a cell plate voltage generator, a driving voltage generator, and a bit line precharge voltage generator. The bit line precharge voltage generator includes a half driving voltage generator for receiving the driving voltage to thereby generate the bit line precharge voltage, a second reference voltage generator for generating the second reference voltage, and a bit line precharge voltage releasing device for discharging a surplus voltage.
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: May 13, 2008
    Assignee: Hynix Semiconductor Inc.
    Inventor: Hyun-Cheol Lee