Patents by Inventor Chang-Hoon Oh

Chang-Hoon Oh 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: 12090510
    Abstract: Provided is a method for preparing a silica layer, comprising bringing to gelation a precursor layer formed from a precursor composition comprising a silica precursor, an acid catalyst and a surfactant.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: September 17, 2024
    Assignee: LG Chem, Ltd.
    Inventors: Hyun Taek Oh, Chang Hoon Sin, Kwang Seung Park, Moon Soo Park
  • Publication number: 20240278528
    Abstract: A composite insulating material includes two or more blankets, each having a substrate for a blanket and aerogel formed on the inside and a surface of the substrate for the blanket, and a super absorbent polymer layer including super absorbent polymer particles located between the blankets.
    Type: Application
    Filed: June 1, 2023
    Publication date: August 22, 2024
    Applicant: LG Chem, Ltd.
    Inventors: Jong Hun Kim, Jae Hoon Choi, Chang Song Lee, Yong Jin Kim, Kyoung Shil Oh
  • Patent number: 12034192
    Abstract: Disclosed are: an ionomer dispersion having high dispersion stability while also containing high content of ionomer solids, thus optimizing the ionomer morphology in a polymer electrolyte membrane to allow both the ion conductivity and durability of the polymer electrolyte membrane to be improved; a method for producing the ionomer dispersion; and a polymer electrolyte membrane produced using the method.
    Type: Grant
    Filed: September 29, 2020
    Date of Patent: July 9, 2024
    Assignee: KOLON INDUSTRIES, INC.
    Inventors: Na Young Kim, Dong Hoon Lee, Eun Su Lee, Jung Hwa Park, Seung Jib Yum, Chang Hoon Oh, Hye Song Lee
  • Patent number: 11894506
    Abstract: A display apparatus is provided. The display apparatus includes a pad spaced away from an encapsulating element. The pad can have a stacked structure of a pad electrode layer and a pad cover layer. A side surface of the pad electrode layer can be covered by the pad cover layer. Thus, in the display apparatus, damage of the pad electrode layer due to a subsequent process can be prevented and as such, the reliability of an external signal transmitted through the pad can be improved.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: February 6, 2024
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Sun-Mi Lee, Chang-Hoon Oh
  • Publication number: 20220285715
    Abstract: Disclosed are: an ionomer dispersion having high dispersion stability while also containing high content of ionomer solids, thus optimizing the ionomer morphology in a polymer electrolyte membrane to allow both the ion conductivity and durability of the polymer electrolyte membrane to be improved; a method for producing the ionomer dispersion; and a polymer electrolyte membrane produced using the method.
    Type: Application
    Filed: September 29, 2020
    Publication date: September 8, 2022
    Inventors: Na Young KIM, Dong Hoon LEE, Eun Su LEE, Jung Hwa PARK, Seung Jib YUM, Chang Hoon OH, Hye Song LEE
  • Patent number: 11230194
    Abstract: The present invention discloses an auto re-closing device and method for an electric vehicle charging cable control device. The present invention is directed to an auto re-closing device and method for an electric vehicle charging cable control device, which are capable of stopping charging when a fault occurs and retrying to resume charging when charging is stopped.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: January 25, 2022
    Inventors: Myeong-jin Kwon, Chang-hoon Oh
  • Patent number: 11053365
    Abstract: The present inventive concept relates to a method of preparing an ion-exchange membrane using a chemical modification and an ion-exchange membrane prepared thereby. More specifically, the present inventive concept relates to a method of preparing an ion-exchange membrane, which is characterized by modifying sulfonic acid groups of a perfluorinated sulfonic acid electrolyte membrane with carboxyl groups and includes chlorinating sulfonic acid groups of a perfluorinated sulfonic acid electrolyte membrane; nitrilating the chlorinated electrolyte membrane; and hydrolyzing the nitrilated electrolyte membrane, and an ion-exchange membrane chemically modified thereby.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: July 6, 2021
    Inventors: Chang Hyun Lee, Chang Hoon Oh, Jin Pyo Hwang
  • Publication number: 20210202812
    Abstract: A display apparatus is provided. The display apparatus includes a pad spaced away from an encapsulating element. The pad can have a stacked structure of a pad electrode layer and a pad cover layer. A side surface of the pad electrode layer can be covered by the pad cover layer. Thus, in the display apparatus, damage of the pad electrode layer due to a subsequent process can be prevented and as such, the reliability of an external signal transmitted through the pad can be improved.
    Type: Application
    Filed: December 11, 2020
    Publication date: July 1, 2021
    Applicant: LG Display Co., Ltd.
    Inventors: Sun-Mi Lee, Chang-Hoon Oh
  • Publication number: 20200254882
    Abstract: The present invention discloses an auto re-closing device and method for an electric vehicle charging cable control device. The present invention is directed to an auto re-closing device and method for an electric vehicle charging cable control device, which are capable of stopping charging when a fault occurs and retrying to resume charging when charging is stopped.
    Type: Application
    Filed: December 19, 2016
    Publication date: August 13, 2020
    Inventors: Myeong-jin KWON, Chang-hoon OH
  • Publication number: 20200122093
    Abstract: The present inventive concept relates to a method of preparing an ion-exchange membrane using a chemical modification and an ion-exchange membrane prepared thereby. More specifically, the present inventive concept relates to a method of preparing an ion-exchange membrane, which is characterized by modifying sulfonic acid groups of a perfluorinated sulfonic acid electrolyte membrane with carboxyl groups and includes chlorinating sulfonic acid groups of a perfluorinated sulfonic acid electrolyte membrane; nitrilating the chlorinated electrolyte membrane; and hydrolyzing the nitrilated electrolyte membrane, and an ion-exchange membrane chemically modified thereby.
    Type: Application
    Filed: April 19, 2018
    Publication date: April 23, 2020
    Inventors: Chang Hyun LEE, Chang Hoon OH, Jin Pyo HWANG
  • Publication number: 20160154449
    Abstract: A system on chip may include: a master device configured to execute a dynamic voltage and frequency scaling (DVFS) program; a slave device configured to communicate with the master device; and/or a performance monitoring unit configured to receive first events generated while instructions are being processed by the master device, configured to generate a first count value by counting a number of second events corresponding to a total number of the instructions related with the first events and configured to generated a second count value counting a number of third events related with first instructions that can be processed by interaction between the master device and the slave device among the first events. The DVFS program may be configured to generate a control signal for controlling DVFS of at least one of the master device and the slave device based on the first count value and the second count value.
    Type: Application
    Filed: November 17, 2015
    Publication date: June 2, 2016
    Inventors: Eui Choel LIM, Chang Hoon OH, Dong Hee HAN
  • Patent number: 8416509
    Abstract: An optical apparatus for plasma includes a light collection lens provided to receive optical emission spectrum from plasma, a first aperture stop disposed between the light collection lens and the plasma to block out-focused light, a second aperture stop disposed between the light collection lens and an imaging area of the light collection lens to block in-focused light, and a pinhole disposed at the imaging area of the light collection lens to limit depth of focus.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: April 9, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: HunJung Yi, Jae-Won Hahn, Seungki Chae, Chang-Hoon Oh
  • Publication number: 20100200767
    Abstract: An optical apparatus for plasma includes a light collection lens provided to receive optical emission spectrum from plasma, a first aperture stop disposed between the light collection lens and the plasma to block out-focused light, a second aperture stop disposed between the light collection lens and an imaging area of the light collection lens to block in-focused light, and a pinhole disposed at the imaging area of the light collection lens to limit depth of focus.
    Type: Application
    Filed: December 18, 2009
    Publication date: August 12, 2010
    Inventors: HunJung YI, Jae-Won HAHN, Seungki CHAE, Chang-Hoon OH
  • Patent number: 7507814
    Abstract: The invention provides a novel compound of Formula II which is useful in the preparation of imipenem monohydrate of Formula I, wherein R1 is a p-nitrobenzyl or p-methoxybenzyl group; and R2 and R3 may be identical to or different from each other and are each independently a C1-6alkyl or aryl group, or a derivative thereof, and a process for preparing the compound of Formula II by coupling (5R,6S) p-nitrobenzyl-3-(diphenylphosphono)-6-[(1R)-1-hydroxyethyl]-1-azabicyclo[3.2.0]hept-2-ene-7-one-2-carboxylate with 2-aminoetahnethiol hydrocloride in the presence of a base, followed by a reaction with a ketone. Further, the invention provides a process for preparing the compound of Formula I by reacting a compound of Formula II with isopropylformimidate or benzylformimidate in the presence of a base, followed by hydrogenation, separation and crystallization.
    Type: Grant
    Filed: December 9, 2004
    Date of Patent: March 24, 2009
    Assignee: Choongwae Pharm. Co.
    Inventors: Hyun Seop Bae, Tae Seop Hwang, Chan Yong Ahn, Chang Hoon Oh, Moo Sung Kim
  • Patent number: 7480098
    Abstract: Disclosed herein are a microlens array sheet having a black matrix and a method for manufacturing the same. The manufacturing method includes a) the step of defining the regions of light apertures, through which condensed light passes, in a negative-type light-sensitive resin layer by radiating and condensing parallel light after sequentially laying a microlens array layer, a transparent support substrate or film layer and the negative-type light-sensitive resin layer one on top of another, and b) eliminating portions other than the regions of the light apertures formed in the light-sensitive resin layer, and forming a black matrix layer in regions where the portions have been eliminated.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: January 20, 2009
    Assignees: LG Electronics Inc., LG Micron Ltd.
    Inventors: Chang-Hoon Oh, Hyouk Kwon, Tae-Sun Lim, Young-Joo Yee, Ki-Won Park, Dong-Mug Seong, Gun-Woo Lee
  • Publication number: 20080190493
    Abstract: Disclosed is the sensor module, including a housing having a connection path connected to a channel on which a fluid flows; a sensor disposed inside the housing so as to be communicated with the connection path, and measuring information about the fluid introduced from the connection path; and an overpressure protection means disposed at the connection path, and selectively blocking the connection path according to a pressure applied from the fluid so as to prevent the transfer of a pressure greater than a reference pressure to the sensor, the circulation system having the same, and the method for assembling the sensor module. It can prevent the transfer of an excessive pressure of the fluid to the sensor, thereby preventing the sensor from being damaged by the overpressure.
    Type: Application
    Filed: February 13, 2008
    Publication date: August 14, 2008
    Inventors: Chang-Hoon OH, Si-Hong Ahn, Ki-Chang Song
  • Patent number: 7289421
    Abstract: In an optical pickup head of an optical recording reproducing apparatus, a fabrication method thereof, a lubricant-coated optical pickup head of an optical recording reproducing apparatus and a method for coating lubricant onto an optical pickup head, by using a MEMS (micro electro mechanical system) technique used for designing, fabricating and application of a microstructure, it is possible to miniaturize an optical pickup head of an optical recording reproducing apparatus and reduce a fabrication cost thereof.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: October 30, 2007
    Assignee: LG Electronics Inc.
    Inventors: Seong-Hyok Kim, Young-Joo Yee, Jung-Hoon Choi, Chang-Hoon Oh
  • Patent number: 7268949
    Abstract: A microlens array sheet and a manufacturing method thereof. The microlens array sheet comprises: a transparent substrate; bases formed on the transparent substrate, the bases having the same height as a result of a planarization process conducted for the upper portions of the bases, microlenses formed on the bases; and a gap-filling film applied on the resulting structure, in which the bases have the same height. The method comprises the steps of: depositing base-forming molds on a transparent support substrate or film and loading a material to be used as bases between the base-forming molds; polishing the upper portion of the material for use as bases so as to form bases having the same level, and removing the base-forming molds; depositing microlenses on the formed bases; and depositing a gap-filling film on the resulting structure.
    Type: Grant
    Filed: September 23, 2005
    Date of Patent: September 11, 2007
    Assignees: LG Electronics Inc., LG Micron Ltd.
    Inventors: Chang-Hoon Oh, Hyouk Kwon, Tae-Sun Lim, Young-Joo Yee, Ki-Won Park, Dong-Mug Seong, Gun-Woo Lee
  • Patent number: 7259915
    Abstract: Disclosed is a microlens array sheet capable of improving a viewing angle by maintaining a fill factor while reducing a radius of curvature of the microlens of the microlens array sheet. To this end, the microlens array sheet includes: a substrate; a lens arranged on the substrate; and a gap filling layer formed at exposed surfaces of the substrate and the lens, wherein the lens is arranged as high as or at a higher position than a height of the gap filling layer formed at a gap between lenses arranged on the substrate.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: August 21, 2007
    Assignees: LG Electronics Inc., LG Micron Ltd.
    Inventors: Hyouk Kwon, Chang-Hoon Oh, Young-Joo Yee, Ji-Hyouk Chung, Tae-Sun Lim
  • Patent number: 7248407
    Abstract: The present invention discloses a microlens array sheet of a projection screen including a lens sheet having a predetermined area, microlenses arranged on one surface of the lens sheet in the horizontal and vertical directions, a black matrix including apertures corresponding to the microlenses, and being adhered to the other surface of the lens sheet, an optical diffusing layer formed on the lens sheet to cover the black matrix, for widening a viewing angle, and a protecting film for protecting the optical diffusing layer. The microlens array sheet of the projection screen is manufactured by using a process for manufacturing a semiconductor device, a reflow process and a plating process for a mold, thereby improving luminance and definition of the projection screen at a low unit cost of production.
    Type: Grant
    Filed: June 4, 2004
    Date of Patent: July 24, 2007
    Assignees: LG Electronics Inc., LG Micron Ltd.
    Inventors: Hyouk Kwon, Young-Joo Yee, Chang-Hoon Oh, Gun-Woo Lee, Ki-Won Park, Dong-Mug Seong