Patents by Inventor Chul-Hwan Kim

Chul-Hwan Kim 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: 9417499
    Abstract: A multi-color electrophoretic display (EPD) device, an image sheet, and a method of fabricating the same. The multi-color EPD device includes: a plurality of unit color pixels; and a plurality of color capsules, each comprising color capsule shell which stores a dielectric fluid and at least one type of electrophoretic particles dispersed in the dielectric fluid, the plurality of color capsules being arranged to define subpixels of each of the plurality of unit color pixels.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: August 16, 2016
    Assignee: LG Display Co., Ltd.
    Inventors: Chul Hwan Kim, Yong Eui Lee
  • Patent number: 9139703
    Abstract: Provided is a method of solubilizing a poorly soluble/insoluble active material through formation of an oligomer composite, in which a structure having a hydrophobic cavity structure is formed by using oligomers derived from two types of hydrophilic natural polymers and a poorly soluble/insoluble component is encapsulated in the cavity structure, and thus, self-aggregation of the poorly soluble/insoluble material is prevented and simultaneously, thermodynamic stability increases to effectively solubilize the poorly soluble/insoluble material.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: September 22, 2015
    Assignee: BIOGENICS, INC.
    Inventors: Chul-Hwan Kim, Seung-Hak Ko, Jae-Seong Shim, Eun-Kyoung Kwon, Yong-Han Choi
  • Publication number: 20150263506
    Abstract: An apparatus and method for controlling adaptive reclosing based on transient stability of a power transmission line are disclosed. The apparatus includes a power angle calculation unit, an integral square error (ISE) second-order differential calculation unit, a stability determination unit, and a disconnection signal generation unit. The power angle calculation unit acquires the instantaneous value of a power angle based on voltage and phase angle measurement signals. The ISE second-order differential calculation unit acquires the instantaneous value of the second-order differential of the ISE of the power angle. The stability determination unit determines whether a system is stable or unstable based on the transitions in the instantaneous value of the second-order differential of the ISE.
    Type: Application
    Filed: February 24, 2015
    Publication date: September 17, 2015
    Applicant: Research & Business Foundation SUNGKYUNKWAN UNIVERISTY
    Inventors: Chul Hwan KIM, Gi Hyeon GWON, Yun Sik OH, Ji Kyung PARK, Gyu Jung CHO, Seung Hyun SOHN
  • Publication number: 20150171462
    Abstract: The present invention relates to an electrode assembly, to a battery comprising same, and to a method for manufacturing same. The electrode assembly according to one embodiment of the present invention comprises: an electrical insulation layer including a base unit having a first main surface and a second main surface opposite the first main surface; a first electrode formed on the first main surface of the electrical insulation layer; a first lead electrically connected to the first electrode and extending outward from the electrical insulation layer; a second electrode formed on the second main surface of the electrical insulation layer and having different polarity than that of the first electrode; a second lead electrically connected to the second electrode and extending in the direction opposite that in which the first lead extends; and a separation film formed on the first electrode and/or second electrode.
    Type: Application
    Filed: July 3, 2013
    Publication date: June 18, 2015
    Inventors: Young Jin Hong, Chul Hwan Kim
  • Patent number: 8834906
    Abstract: Disclosed herein are a color capsule composition, which contains a polymer and a plasticizer swelling the polymer so as to allow the capsule particles to easily break and in which the capsule particles have a porous structure that boosts the effects thereof, and a method for preparing the color capsule composition. The preparation method comprises: uniformly mixing a color pigment, a plasticizer and a polymer in a first solvent to produce a first mixture solution; spray-drying the first mixture solution to produce core particles in which the color pigment is covered by the polymer; uniformly mixing the obtained core particles, a functional pigment and a second solvent to produce a second mixture solution; and spray-drying the second mixture solution to produce in which a coating layer of the functional pigment is formed on the outer surface of the polymer.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: September 16, 2014
    Assignee: Biogenics, Inc.
    Inventors: Chul-Hwan Kim, Tae-Sung Ko, Han-Joon Kim, Choa-Jin Kim, Jong-Hyun Choi, Chang-Hun Ji
  • Patent number: 8830562
    Abstract: A multi-color electrophoretic display (EPD) device, an image sheet, and a method of manufacturing the same. The method of manufacturing the multi-color EPD device includes: forming capsules including photosensitive color-developing capsule shells each of which stores a dielectric fluid and at least one type of electrophoretic particles dispersed in the dielectric fluid; disposing the capsules in a unit color pixel area on a substrate; exposing the capsules to light to form a latent image of a color pattern image on the capsules; and developing the photosensitive color-developing capsule shells of the capsules to form unit color pixels including color capsules.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: September 9, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Chul Hwan Kim, Yong Eui Lee
  • Patent number: 8743519
    Abstract: The reclosing control device configured to perform a reclosing control in case of a fault in a transmission line. Further, the reclosing control device includes a voltage detection unit configured to detect a faulted phase voltage waveform and extract a harmonic component contained in the faulted phase voltage waveform; a HR calculating unit configured to calculate ratio values between even harmonics and odd harmonics based on the extracted harmonic component; and a reclosing control unit configured to determine whether or not an arc is finally extinguished based on the calculated ratio value and perform a reclosing control depending on a result of the determination.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: June 3, 2014
    Assignee: Sungyunkwan University Foundation for Corporate Collaboration
    Inventors: Chul Hwan Kim, Chul Moon Lee, Hun Chul Seo
  • Publication number: 20140030605
    Abstract: The present invention relates to a battery having an electrode structure using metal fiber and a preparation method of an electrode structure. A preparation method of an electrode structure, according to one embodiment of the present invention, includes a step for providing one or more metal fibers forming a conductive network; a step for providing particle compositions including electrical active materials of a particle shape; a step for mixing the metal fibers and the particle compositions; and a step for compressing the mixed metal fibers and the particle compositions.
    Type: Application
    Filed: April 4, 2012
    Publication date: January 30, 2014
    Applicant: SHINE CO., LTD
    Inventors: Chang Hyeon Kim, Lee Hyun Shin, Chul Hwan Kim
  • Publication number: 20130114125
    Abstract: A multi-color electrophoretic display (EPD) device, an image sheet, and a method of fabricating the same. The multi-color EPD device includes: a plurality of unit color pixels; and a plurality of color capsules, each comprising color capsule shell which stores a dielectric fluid and at least one type of electrophoretic particles dispersed in the dielectric fluid, the plurality of color capsules being arranged to define subpixels of each of the plurality of unit color pixels.
    Type: Application
    Filed: March 25, 2011
    Publication date: May 9, 2013
    Inventors: Chul Hwan Kim, Yong Eui Lee
  • Publication number: 20130114126
    Abstract: A multi-color electrophoretic display (EPD) device, an image sheet, and a method of manufacturing the same. The method of manufacturing the multi-color EPD device includes: forming capsules including photosensitive color-developing capsule shells each of which stores a dielectric fluid and at least one type of electrophoretic particles dispersed in the dielectric fluid; disposing the capsules in a unit color pixel area on a substrate; exposing the capsules to light to form a latent image of a color pattern image on the capsules; and developing the photosensitive color-developing capsule shells of the capsules to form unit color pixels including color capsules.
    Type: Application
    Filed: March 25, 2011
    Publication date: May 9, 2013
    Inventors: Chul Hwan Kim, Yong Eui Lee
  • Patent number: 8284529
    Abstract: The present invention relates to a reclosing control system and method using a superconducting fault current limiter. The reclosing control system includes a superconducting fault current limiting device in which two circuits, each having a switch and a superconducting fault current limiter connected in series with each other, are connected in parallel with each other. A recloser is disposed between the superconducting fault current limiting device and a distribution line and is configured to control reclosing. The distribution line is connected to the recloser and is configured to transfer power to a load.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: October 9, 2012
    Assignee: Sungkyunkwan University Foundation for Corporation
    Inventors: Chul Hwan Kim, Sang Bong Rhee, Hun Chul Seo, Yun Tae Ko
  • Publication number: 20120219604
    Abstract: Provided is a method of solubilizing a poorly soluble/insoluble active material through formation of an oligomer composite, in which a structure having a hydrophobic cavity structure is formed by using oligomers derived from two types of hydrophilic natural polymers and a poorly soluble/insoluble component is encapsulated in the cavity structure, and thus, self-aggregation of the poorly soluble/insoluble material is prevented and simultaneously, thermodynamic stability increases to effectively solubilize the poorly soluble/insoluble material.
    Type: Application
    Filed: October 15, 2010
    Publication date: August 30, 2012
    Inventors: Chul-Hwan Kim, Seung-Hak Ko, Jae-Seong Shim, Eun-Kyoung Kwon, Yong-Han Choi
  • Publication number: 20120176712
    Abstract: The reclosing control device configured to perform a reclosing control in case of a fault in a transmission line. Further, the reclosing control device includes a voltage detection unit configured to detect a faulted phase voltage waveform and extract a harmonic component contained in the faulted phase voltage waveform; a HR calculating unit configured to calculate ratio values between even harmonics and odd harmonics based on the extracted harmonic component; and a reclosing control unit configured to determine whether or not an arc is finally extinguished based on the calculated ratio value and perform a reclosing control depending on a result of the determination.
    Type: Application
    Filed: July 11, 2011
    Publication date: July 12, 2012
    Applicant: Sungkyunkwan University Foundation for Corporate Collaboration
    Inventors: Chul Hwan Kim, Chul Moon Lee, Hun Chul Seo
  • Patent number: 8004801
    Abstract: There is provided an apparatus for decreasing an inrush current which comprises a power system including a transformer, and a superconducting fault current limiter electrically connected to the transformer. A resistance value of the superconducting fault current limiter is calculated by using a variation of the inrush current and a variation of the voltage drop of the power system according to a value of insertion resistance. In the apparatus for decreasing the inrush current, the optimal resistance value considering both the decrease rate of the inrush current and the voltage drop by the insertion of the superconducting fault current limiter is decided as the resistance value of the superconducting fault current limiter. Accordingly, the power system is efficiently operated depending on the characteristics of the power system in which the superconducting fault current limiter is installed.
    Type: Grant
    Filed: July 29, 2008
    Date of Patent: August 23, 2011
    Assignee: SUNGKYUNKWAN University Foundation for Corporate Collaboration
    Inventors: Chul-hwan Kim, Hun-chul Seo, Sang-bong Rhee
  • Publication number: 20110165208
    Abstract: Disclosed herein are a color capsule composition, which contains a polymer and a plasticizer swelling the polymer so as to allow the capsule particles to easily break and in which the capsule particles have a porous structure that boosts the effects thereof, and a method for preparing the color capsule composition. The preparation method comprises: uniformly mixing a color pigment, a plasticizer and a polymer in a first solvent to produce a first mixture solution; spray-drying the first mixture solution to produce core particles in which the color pigment is covered by the polymer; uniformly mixing the obtained core particles, a functional pigment and a second solvent to produce a second mixture solution; and spray-drying the second mixture solution to produce in which a coating layer of the functional pigment is formed on the outer surface of the polymer.
    Type: Application
    Filed: May 28, 2010
    Publication date: July 7, 2011
    Inventors: Chul-Hwan Kim, Tae-Sung Ko, Han-Joon Kim, Choa-Jin Kim, Jong-Hyun Choi, Chang-Hun Ji
  • Publication number: 20100255109
    Abstract: The present invention provides stabilized antioxidant particles, each of which includes a core consisting of an antioxidant and a first coating layer formed on the surface of the core, wherein the first coating layer is formed by polymerizing at least one ?-lipoic acid or its derivative, a composition including the same, and a method for preparing the same.
    Type: Application
    Filed: August 4, 2008
    Publication date: October 7, 2010
    Applicant: BIOGENICS, INC.
    Inventors: Chul Hwan Kim, Chan Jae Shin, So Yeon Seo, Jung Ae Kwon
  • Publication number: 20100239549
    Abstract: The present invention relates to an alpha lipoic acid capsule composition stabilized in aqueous phase, which can effectively prevent alpha lipoic acid from decomposing due to external environmental conditions, such as water, temperature, light, and the like, and can maintain the stability of alpha lipoic acid from the interaction between the lipoic acid and other materials, which are added together with the lipoic acid when the lipoic acid is applied to cosmetics, foods, or medical supplies, by mixing water-dispersed alpha lipoic acid, a water-insoluble polymer having self-emulsification properties, and a hydrophilic solvent, thus capsulating alpha lipoic acid, and to a method of preparing the same.
    Type: Application
    Filed: April 26, 2006
    Publication date: September 23, 2010
    Applicant: DPI SOLUTIONS, INC.
    Inventors: Chul Hwan Kim, Ki Seok Park, Hyun Nam Yoon
  • Publication number: 20100194672
    Abstract: Provided is a color filter that can ensure high productivity by producing all colors in a single process irrespective of colors of pixels and can improve uniformity in the transmittance, color reproduction, and thickness of pixels having their colors. The color filter includes: a substrate; and at least one of light sensitive color developing layers stacked on the substrate, the light sensitive color developing layers having pixel portions, wherein the pixel portions are defined by partial color developing regions formed by exposure and development of the light sensitive color developing layer.
    Type: Application
    Filed: September 19, 2008
    Publication date: August 5, 2010
    Applicant: IMAGE & MATERIALS, INC.
    Inventors: Chul Hwan Kim, Yong Eui Lee
  • Publication number: 20100163201
    Abstract: A method of measuring a Stockigt sizing degree of a paper or hoard is provided. The method includes: placing a paper or board, to which FeCl3 (II) is dropped or applied, on NH4SCN solution; sequentially capturing, by using a camera, a process of forming reddish brown Fe(SCN)3 wile the FeCl3 (II) meets the NH4SCN solution penetrating in a thickness direction of the specimen, and recording RGB values of droplet image of the reddish brown Fe(SCN)3; converting the RGB values into HSV values; recording hue (H) value of the HSV values with respect to time; and checking a point where a differentiation value of the H value recorded with respect to time becomes maximum.
    Type: Application
    Filed: April 10, 2006
    Publication date: July 1, 2010
    Applicant: Industry-Academ. Coop Found. Gyeongsang Nat. Univ.
    Inventors: Chul-hwan Kim, Jong-cheol Kim
  • Patent number: 7732940
    Abstract: An apparatus for reducing a neutral current using a load switching method in accordance with the present invention includes a phase current detection unit for detecting a phase current in each of a top stage power line and a bottom stage power line, a load switching unit for changing an arrangement of a load connected each phase of at least one among the top stage power line and the bottom stage power line and a control unit for controlling the load switching unit so as to compare a strength of the detected phase current of the top stage power line with a strength of the detected phase current of the bottom stage power line and to change the arrangement of the load connected to each phase of at least one among the top stage power line and the bottom stage power line according to the comparison result.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: June 8, 2010
    Assignee: Sungkyunkwan University Foundation For Corporate Collaboration
    Inventors: Chul Hwan Kim, Keon Woo Park