Patents by Inventor Young Min Choi

Young Min Choi 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: 7563540
    Abstract: A cathode active material of formula (1) below, and a lithium secondary battery using the same, have an extended cycle life and effective charging/discharging characteristics and include a compound of formula (1) below: LixCoyM1-yA2??(1) where 0.95?x?1.0; 0?y?1; M is at least one selected from the group consisting of Ni, Fe, Pb, Mg, Al, K, Na, Ca, Si, Ti, Sn, V, Ge, Ga, B, As, Zr, Mn, and Cr; and A is one selected from the group consisting of O, F, S, and P. The cathode active material has, as measured by Raman spectroscopy, a ratio of peak intensities between spinel and hexagonal A1g vibrational modes in an approximate range of 1:0.1-1:0.4, a ratio of peak intensities between hexagonal A1g and Eg vibrational modes in an approximate range of 1:0.9-1:3.5, and a ratio of peak intensities between spinel A1g and F2g vibrational modes in an approximate range of 1:0.2-1:0.4.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: July 21, 2009
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Hyouk-soo Han, Young-min Choi
  • Patent number: 7547491
    Abstract: Composite cathode active materials comprising a composite oxide and an acid treated with an organic solvent are provided. The composite cathode active materials are prepared by treating mixtures of nickel-based composite oxides and organic acids with organic solvents. The active materials suppress gelation of the electrode slurries for a long period of time, even when the active materials are mixed with fluorine-based polymers, by decreasing the basicity of the slurries and the amount of lithium present on the surfaces of the active materials. As a result, electrode slurries having high stability can be prepared. Cathodes and lithium batteries comprising the slurries have excellent charge-discharge characteristics, including high capacity and excellent high rate discharge characteristics.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: June 16, 2009
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Yong-nam Ham, Gue-sung Kim, Young-min Choi
  • Patent number: 7543667
    Abstract: The present invention provides a mounting structure for a compressed gas storage tank of a vehicle in which at least two high pressure storage tanks are modularized and mounted in a vehicle. For this, the present invention provides a mounting structure for a compressed gas storage tank of a vehicle, comprising: a plurality of storage tanks for storing a compressed gas therein, including a hemispherical dome portion formed on both ends thereof; panel brackets connected to both ends of the storage tanks; pipe frames connecting edges of the panel brackets connected to both sides of the storage tanks; and high pressure parts and pipes connected to the storage tanks in a state where the panel brackets and the pipe frames are connected.
    Type: Grant
    Filed: November 29, 2007
    Date of Patent: June 9, 2009
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Ki Ho Hwang, Gyu Jin Jang, Young Min Choi, Sang Hyun Kim
  • Publication number: 20090087743
    Abstract: An electrode includes a current collector and an active material layer on top of the current collector, wherein the active material layer includes an active material and a binder, and a complex of a first conductive agent and a binding agent is formed on a surface of the active material; a method of manufacturing the same, and a lithium battery including the electrode.
    Type: Application
    Filed: June 13, 2008
    Publication date: April 2, 2009
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Gue-sung KIM, Yong-nam Ham, Young-min Choi
  • Publication number: 20090000842
    Abstract: The present invention provides a mounting structure for a compressed gas storage tank of a vehicle in which at least two high pressure storage tanks are modularized and mounted in a vehicle. For this, the present invention provides a mounting structure for a compressed gas storage tank of a vehicle, comprising: a plurality of storage tanks for storing a compressed gas therein, including a hemispherical dome portion formed on both ends thereof; panel brackets connected to both ends of the storage tanks; pipe frames connecting edges of the panel brackets connected to both sides of the storage tanks; and high pressure parts and pipes connected to the storage tanks in a state where the panel brackets and the pipe frames are connected.
    Type: Application
    Filed: November 29, 2007
    Publication date: January 1, 2009
    Applicants: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Ki Ho Hwang, Gyu Jin Jang, Young Min Choi, Sang Hyun Kim
  • Patent number: 7459235
    Abstract: Provided are an anode composition for a lithium battery, and an anode and a lithium battery using the same. The anode composition can improve anode and battery characteristics while using water as a solvent that is harmless to humans. The anode composition includes an anode active material, a synthetic rubber binder, a cellulose-based dispersing agent, and a water-soluble anionic polyelectrolyte.
    Type: Grant
    Filed: June 21, 2004
    Date of Patent: December 2, 2008
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Young-Min Choi, Kyung-Ho Kim, Ungyu Paik
  • Publication number: 20080224976
    Abstract: A method of temporally and/or spatially randomly dithering, to facilitate converting an input M-bit subpixel signal into an (M?N)-bit subpixel signal, may include spatially and/or temporally randomly generating a dithering mask pattern satisfying a condition that a spatial mean and/or a temporal mean of an image signal before dithering matches a spatial mean and/or a temporal mean of the image signal after dithering, respectively, and converting the M-bit subpixel signal into the (M?N)-bit subpixel signal using the dithering mask pattern.
    Type: Application
    Filed: March 12, 2008
    Publication date: September 18, 2008
    Inventors: Jae-chul Lee, Jong-seon Kim, Young-min Choi, Keun-ho Ryu
  • Publication number: 20080204444
    Abstract: A timing controller to reduce a flicker in a display device is provided. The timing controller includes a line pattern detector and a frame pattern detector. The line pattern detector divides received data into a plurality of unit blocks and detects a line polarity of each of a plurality of horizontal lines included in each of the unit blocks. The frame pattern detector generates a polarity control signal to control a data inversion method based on a frame image pattern detected based on line polarities of the respective horizontal lines.
    Type: Application
    Filed: August 2, 2007
    Publication date: August 28, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Keun-Ho Ryu, Young Min Choi, Jong Seon Kim, Jae Chul Lee
  • Patent number: 7332235
    Abstract: A fuel cell system includes a fuel cell stack generating an electric energy from an electrochemical reaction between hydrogen and oxygen, an air supply pump pumping air to the fuel cell stack, an adsorptive air filter filtering air sucked into the air supply pump; and an oxygen supply device connected to an air supply line between the fuel cell stack and the air supply pump, separating oxygen from the air and then supplying the oxygen.
    Type: Grant
    Filed: December 30, 2004
    Date of Patent: February 19, 2008
    Assignee: Hyundai Mobis Co., Ltd.
    Inventors: Ui-Sik Jeon, Young-Min Choi, Sang-Yeoul Ahn
  • Patent number: 7314683
    Abstract: A cathode active material is prepared by mixing a transition metal compound and a lithium compound in a molar ratio of 1:1.0-1:1.2 and thermally treating the mixture while supplying CO2 and O2 in a ratio of partial pressures ranging from 1:0.001-1:1,000, and a lithium battery utilizes the cathode active material. The lithium battery ensures safety against over-charging because an overflow of current may be effectively cut off without reducing discharging capacity and cycle life characteristics.
    Type: Grant
    Filed: February 6, 2004
    Date of Patent: January 1, 2008
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Young-min Choi, Yong-nam Ham, Jung-joon Park
  • Publication number: 20070172999
    Abstract: In a thin film semiconductor device realized on a flexible substrate, an electronic device using the same, and a manufacturing method thereof, the thin film semiconductor device and an electronic device include a flexible substrate, a semiconductor chip, which is formed on the flexible substrate, and a protective cap, which seals the semiconductor chip. Durability of the thin film semiconductor device against stress due to bending of the substrate is improved by using the protective cap.
    Type: Application
    Filed: February 5, 2007
    Publication date: July 26, 2007
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Do-young Kim, Wan-jun Park, Young-soo Park, June-key Lee, Yo-sep Min, Jang-yeon Kwon, Sun-ae Seo, Young-min Choi, Soo-doo Chae
  • Publication number: 20070160522
    Abstract: This invention relates to a method to induce growth of carbon nanotubes using a liquid phased-hydrocarbon based material under a critical range of equilibrating between liquid and gas phases, thereby easily manipulating a required carbon source. This invention also relates to a method to facilitate easy generation of a carbon backbone of the carbon nanotube because the reaction is performed in the presence of a metal nanoparticle or a metal compound capable of spontaneously generating a seed catalyst which stimulates the growth of carbon nanotubes as well as secures safety enough for the industrial application by using a mild reaction condition within the critical range. Accordingly, this invention can produce the carbon nanotube with high transition efficiency under a mild condition with a relatively lower temperature and pressure than those in conventional gas phased-methods without using a costly equipment, thereby cost-effectively producing the carbon nanotube in large quantities.
    Type: Application
    Filed: March 31, 2004
    Publication date: July 12, 2007
    Inventors: Beyong-Hwan Ryu, Ki-Jeong Kong, Hyun-Ju Chang, Young-Min Choi, Jae-do Lee, Ha-Kyun Jung, Chang-Gyoun Kim, Han-Sung Park
  • Patent number: 7228158
    Abstract: A portable terminal can provide stereo sound.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: June 5, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jong-Seong Lee, Chang-Hwan Hwang, Jin-Woo Kim, Young-Min Choi, Tae-Hwa Moon
  • Patent number: 7176488
    Abstract: In a thin film semiconductor device realized on a flexible substrate, an electronic device using the same, and a manufacturing method thereof, the thin film semiconductor device and an electronic device include a flexible substrate, a semiconductor chip, which is formed on the flexible substrate, and a protective cap, which seals the semiconductor chip. Durability of the thin film semiconductor device against stress due to bending of the substrate is improved by using the protective cap.
    Type: Grant
    Filed: December 31, 2003
    Date of Patent: February 13, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Do-young Kim, Wan-jun Park, Young-soo Park, June-key Lee, Yo-sep Min, Jang-yeon Kwon, Sun-ae Seo, Young-min Choi, Soo-doo Chae
  • Publication number: 20060257745
    Abstract: Composite cathode active materials having a large diameter active material and a small diameter active material are provided. The ratio of the average particle diameter of the large diameter active material to the average particle diameter of the small diameter active material ranges from about 6:1 to about 100:1. Mixing the large and small diameter active materials in a proper weight ratio improves packing density Additionally, including highly stable materials and highly conductive materials in the composite cathode active materials improves volume density, discharge capacity and high rate discharge capacity.
    Type: Application
    Filed: February 15, 2006
    Publication date: November 16, 2006
    Inventors: Young-min Choi, Kyung-ho Kim, Gue-sung Kim
  • Publication number: 20060216606
    Abstract: An anode active material including a metal core and a coating layer formed on a surface of the metal core is provided. The coating layer includes a conductive metal material. The coating layer covering the metal core is carbon-based and includes a conductive metal material. The anode active material has good electron conductivity and elasticity, thereby enhancing charge/discharge capacity and reducing the stress caused by expansion of the carbon-based coating layer and the metal core during charge/discharge cycles. Direct contact between the metal core and the electrolyte solution is remarkably reduced. In addition, anodes and lithium batteries including the anode active material exhibit excellent charge/discharge characteristics, such as discharge capacity and initial charge/discharge efficiency.
    Type: Application
    Filed: January 27, 2006
    Publication date: September 28, 2006
    Inventors: Gue-sung Kim, Young-min Choi, Han-su Kim
  • Publication number: 20060204850
    Abstract: Composite cathode active materials comprising a composite oxide and an acid treated with an organic solvent are provided. The composite cathode active materials are prepared by treating mixtures of nickel-based composite oxides and organic acids with organic solvents. The active materials suppress gelation of the electrode slurries for a long period of time, even when the active materials are mixed with fluorine-based polymers, by decreasing the basicity of the slurries and the amount of lithium present on the surfaces of the active materials. As a result, electrode slurries having high stability can be prepared. Cathodes and lithium batteries comprising the slurries have excellent charge-discharge characteristics, including high capacity and excellent high rate discharge characteristics.
    Type: Application
    Filed: February 21, 2006
    Publication date: September 14, 2006
    Inventors: Yong-nam Ham, Gue-sung Kim, Young-min Choi
  • Publication number: 20060146241
    Abstract: A liquid crystal display is provided, which includes a first insulating substrate; a gate line formed on the first insulating substrate; a gate insulating layer formed on the gate line; a data line formed on the gate insulating layer, a passivation layer formed on the data line; a pixel electrode formed on the passivation layer and a first cutout pattern; a second insulating substrate facing the first insulating substrate; and a common electrode formed on the second insulating substrate and having a second cutout pattern, wherein width of the domains is equal to or less than 30 microns
    Type: Application
    Filed: September 19, 2002
    Publication date: July 6, 2006
    Inventors: Young-Min Choi, Jang-kun Song, Jin-Yun Kim
  • Publication number: 20060126114
    Abstract: A document processing system and method using imbedded metadata is provided. The system includes a host computer that generates a data file that supports metadata of a document and imbeds metadata in the data file, a mobile storage device that stores the data file, and a Multi-function peripheral (MFP) device that reads the data file from the mobile storage device and extracts the metadata imbedded in the data file and processes the data file based on the extracted metadata.
    Type: Application
    Filed: December 8, 2005
    Publication date: June 15, 2006
    Inventors: Young-min Choi, Mi-sook Song
  • Patent number: 7039112
    Abstract: Disclosed is a moving picture mailing system which comprises a video signal capturing device for capturing digital video signals from video signal information of moving pictures; an audio signal capturing device for capturing digital audio signals from audio signal information of moving pictures; and a moving picture recorder for respectively receiving the video and audio signals from the video and audio signal capturing devices, compressing the video and audio signals using MPEG-4 video and audio compression techniques, multiplexing the compressed signals and transmitting combined bit streams to a moving picture mailing server.
    Type: Grant
    Filed: June 26, 2001
    Date of Patent: May 2, 2006
    Inventors: Jae-Seob Shin, Yeon-Bae Kim, Sung-Gul Ryoo, Hyoung-June Yi, Jae-Seung Ko, Young-Min Choi