Patents by Inventor Chang-gyu Kim

Chang-gyu 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).

  • Publication number: 20250070100
    Abstract: A light emitting device including a first LED sub-unit having a thickness in a first direction, a second LED sub-unit disposed on a portion of the first LED sub-unit in the first direction, each of the first and second LED sub-units comprising a first-type semiconductor layer, a second-type semiconductor layer, and an active layer, a reflective electrode disposed adjacent to the first LED sub-unit and electrically connected to the first-type semiconductor layer of the first LED sub-unit, and a first ohmic electrode forming ohmic contact with the second-type semiconductor layer of the first LED sub-unit, in which the active layer of the first LED sub-unit is configured to generate light, includes AlxGa(1-x-y)InyP (0?x?1, 0?y?1), and overlaps the active layer of the second LED sub-unit in the first direction, and the active layer of the second LED sub-unit includes the same material as the active layer of the first LED sub-unit.
    Type: Application
    Filed: November 7, 2024
    Publication date: February 27, 2025
    Applicant: Seoul Viosys Co., Ltd.
    Inventors: Jong Hyeon CHAE, Chang Yeon KIM, Ho Joon LEE, Seong Gyu JANG, Chung Hoon LEE, Dae Sung CHO
  • Publication number: 20250056991
    Abstract: A display device includes a pixel circuit part including a first oxide semiconductor layer, a first gate driver electrically connected to the pixel circuit part, and including a second oxide semiconductor layer at a same layer as the first oxide semiconductor layer, and a first line part electrically connected to the first gate driver, and defining at least one first dummy contact hole adjacent to the second oxide semiconductor layer.
    Type: Application
    Filed: August 6, 2024
    Publication date: February 13, 2025
    Inventors: YEONG-GYU KIM, SEMYUNG KWON, CHANG-YEOL LEE, WOONGHEE JEONG, YOUNGJIN CHO
  • Patent number: 11977205
    Abstract: An optical element including an optically transparent lens which defines a curved surface having a steepness given by an R/# of from about 0.5 to about 1.0. A film is positioned on the curved surface. The film includes an index layer. A composite layer is positioned on the curved surface having a refractive index greater than the index layer. The composite layer includes HfO2 and Al2O3. The composite layer has a mole fraction X of HfO2, wherein X is from about 0.05 to about 0.95 and a mole fraction of Al2O3 in the composite layer is 1?X.
    Type: Grant
    Filed: April 1, 2022
    Date of Patent: May 7, 2024
    Assignee: Corning Incorporated
    Inventors: Ming-Huang Huang, Chang-gyu Kim, Hoon Kim, Soo Ho Park, Jue Wang
  • Patent number: 11927722
    Abstract: A transparent article is described herein that includes: a glass-ceramic substrate comprising first and second primary surfaces opposing one another and a crystallinity of at least 40% by weight; and an optical film structure disposed on the first primary surface. The optical film structure comprises a plurality of alternating high refractive index (RI) and low RI layers and a scratch-resistant layer. The article also exhibits an average photopic transmittance of greater than 80% and a maximum hardness of greater than 10 GPa, as measured by a Berkovich Hardness Test over an indentation depth range from about 100 nm to about 500 nm. The glass-ceramic substrate comprises an elastic modulus of greater than 85 GPa and a fracture toughness of greater than 0.8 MPa·?m. Further, the optical film structure exhibits a residual compressive stress of ?700 MPa and an elastic modulus of ?140 GPa.
    Type: Grant
    Filed: March 13, 2023
    Date of Patent: March 12, 2024
    Assignee: Corning Incorporated
    Inventors: Jaymin Amin, Jason Thomas Harris, Shandon Dee Hart, Chang-gyu Kim, Karl William Koch, III, Carlo Anthony Kosik Williams, Lin Lin, Dong-gun Moon, Jeonghong Oh, James Joseph Price, Charlene Marie Smith, Ananthanarayanan Subramanian, Ljerka Ukrainczyk, Tingge Xu
  • Publication number: 20230244004
    Abstract: A transparent article is described herein that includes: a glass-ceramic substrate comprising first and second primary surfaces opposing one another and a crystallinity of at least 40% by weight; and an optical film structure disposed on the first primary surface. The optical film structure comprises a plurality of alternating high refractive index (RI) and low RI layers and a scratch-resistant layer. The article also exhibits an average photopic transmittance of greater than 80% and a maximum hardness of greater than 10 GPa, as measured by a Berkovich Hardness Test over an indentation depth range from about 100 nm to about 500 nm. The glass-ceramic substrate comprises an elastic modulus of greater than 85 GPa and a fracture toughness of greater than 0.8 MPa·?m. Further, the optical film structure exhibits a residual compressive stress of ? 700 MPa and an elastic modulus of ?140 GPa.
    Type: Application
    Filed: March 13, 2023
    Publication date: August 3, 2023
    Inventors: Jaymin Amin, Jason Thomas Harris, Shandon Dee Hart, Chang-gyu Kim, Karl William Koch, III, Carlo Anthony Kosik Williams, Lin Lin, Dong-gun Moon, Jeonghong Oh, James Joseph Price, Charlene Marie Smith, Ananthanarayanan Subramanian, Ljerka Ukrainczyk, Tingge Xu
  • Publication number: 20230002884
    Abstract: A system is described herein for film deposition includes a drum; a motor configured to rotate the drum in a direction of rotation; a target including a target material; and a holder attached to the drum. The holder is configured to accommodate a substrate and to expose the substrate to free particles of the target material sputtered from the target, and the holder has an asymmetric shape.
    Type: Application
    Filed: November 19, 2020
    Publication date: January 5, 2023
    Inventors: Chang-gyu Kim, Jeonghong Oh, Jung-Hun Yun
  • Publication number: 20220317340
    Abstract: A transparent article is described herein that includes: a glass-ceramic substrate comprising first and second primary surfaces opposing one another and a crystallinity of at least 40% by weight; and an optical film structure disposed on the first primary surface. The optical film structure comprises a plurality of alternating high refractive index (RI) and low RI layers and a scratch-resistant layer. The article also exhibits an average photopic transmittance of greater than 80% and a maximum hardness of greater than 10 GPa, as measured by a Berkovich Hardness Test over an indentation depth range from about 100 nm to about 500 nm. The glass-ceramic substrate comprises an elastic modulus of greater than 85 GPa and a fracture toughness of greater than 0.8 MPa·?m. Further, the optical film structure exhibits a residual compressive stress of ?700 MPa and an elastic modulus of ?140 GPa.
    Type: Application
    Filed: March 30, 2022
    Publication date: October 6, 2022
    Inventors: Jaymin Amin, Jason Thomas Harris, Shandon Dee Hart, Chang-gyu Kim, Karl William Koch, III, Carlo Anthony Kosik Williams, Lin Lin, Dong-gun Moon, Jeonghong Oh, James Joseph Price, Charlene Marie Smith, Ljerka Ukrainczyk, Tingge Xu
  • Publication number: 20220221617
    Abstract: An optical element including an optically transparent lens which defines a curved surface having a steepness given by an R/# of from about 0.5 to about 1.0. A film is positioned on the curved surface. The film includes an index layer. A composite layer is positioned on the curved surface having a refractive index greater than the index layer. The composite layer includes HfO2 and Al2O3. The composite layer has a mole fraction X of HfO2, wherein X is from about 0.05 to about 0.95 and a mole fraction of Al2O3 in the composite layer is 1?X.
    Type: Application
    Filed: April 1, 2022
    Publication date: July 14, 2022
    Inventors: Ming-Huang Huang, Chang-gyu Kim, Hoon Kim, Soo Ho Park, Jue Wang
  • Patent number: 11320568
    Abstract: An optical element including an optically transparent lens which defines a curved surface having a steepness given by an R/# of from about 0.5 to about 1.0. A film is positioned on the curved surface. The film includes an index layer. A composite layer is positioned on the curved surface having a refractive index greater than the index layer. The composite layer includes HfO2 and Al2O3. The composite layer has a mole fraction X of HfO2, wherein X is from about 0.05 to about 0.95 and a mole fraction of Al2O3 in the composite layer is 1?X.
    Type: Grant
    Filed: May 2, 2019
    Date of Patent: May 3, 2022
    Assignee: Corning Incorporated
    Inventors: Ming-Huang Huang, Chang-gyu Kim, Hoon Kim, Soo Ho Park, Jue Wang
  • Publication number: 20200158916
    Abstract: An optical film structure that includes: an optical film comprising a physical thickness from about 50 nm to about 3000 nm, and a silicon-containing nitride or a silicon-containing oxynitride. The optical film exhibits a maximum hardness of greater than 18 GPa, as measured by a Berkovich Indenter Hardness Test over an indentation depth range from about 100 nm to about 500 nm on a hardness stack comprising a test optical film with a physical thickness of about 2 microns disposed on an inorganic oxide test substrate, the test optical film having the same composition as the optical film. Further, the optical film exhibits an optical extinction coefficient (k) of less than 1×10?2 at a wavelength of 400 nm and a refractive index (n) of greater than 1.8 at a wavelength of 550 nm.
    Type: Application
    Filed: November 15, 2019
    Publication date: May 21, 2020
    Inventors: Shandon Dee Hart, Chang-gyu Kim, Karl William Koch, III, Carlo Anthony Kosik Williams, Lin Lin, Dong-gun Moon, Jung-keun Oh, Charles Andrew Paulson, James Joseph Price
  • Patent number: 10578777
    Abstract: According to one or more embodiments disclosed herein, a coated article may include a substrate and an optical coating. The optical coating may be disposed on a major surface of the substrate and may form an air-side surface. The optical coating may include an optical stack, an adhesion coating, and an easy-to-clean coating. The adhesion coating may comprise an alumina layer and a silica layer. The present disclosure is also directed to methods for depositing optical coatings on substrates and to consumer electronic products which include the coated articles.
    Type: Grant
    Filed: June 22, 2018
    Date of Patent: March 3, 2020
    Assignee: Corning Incorporated
    Inventors: Robert Alan Bellman, Chang-gyu Kim, Eric Louis Null, Jung-keun Oh, Sang-Yoon Oh, Jin-ah Yoo
  • Publication number: 20190346590
    Abstract: An optical element including an optically transparent lens which defines a curved surface having a steepness given by an R/# of from about 0.5 to about 1.0. A film is positioned on the curved surface. The film includes an index layer. A composite layer is positioned on the curved surface having a refractive index greater than the index layer. The composite layer includes HfO2 and Al2O3. The composite layer has a mole fraction X of HfO2, wherein X is from about 0.05 to about 0.95 and a mole fraction of Al2O3 in the composite layer is 1-X.
    Type: Application
    Filed: May 2, 2019
    Publication date: November 14, 2019
    Inventors: Ming-Huang Huang, Chang-gyu Kim, Hoon Kim, Soo Ho Park, Jue Wang
  • Publication number: 20180372920
    Abstract: According to one or more embodiments disclosed herein, a coated article may include a substrate and an optical coating. The optical coating may be disposed on a major surface of the substrate and may form an air-side surface. The optical coating may include an optical stack, an adhesion coating, and an easy-to-clean coating. The adhesion coating may comprise an alumina layer and a silica layer. The present disclosure is also directed to methods for depositing optical coatings on substrates and to consumer electronic products which include the coated articles.
    Type: Application
    Filed: June 22, 2018
    Publication date: December 27, 2018
    Inventors: Robert Alan Bellman, Chang-gyu Kim, Eric Louis Null, Jung-keun Oh, Sang Oh, Jin-ah Yoo
  • Patent number: 9442313
    Abstract: A thermochromic window, the sunlight transmittance of which is adjustable depending on temperature, and a method of fabricating the same. The thermochromic window includes a substrate, a plurality of nanodots formed on the substrate, and a thermochromic thin film coating the substrate and the nanodots. The thermochromic thin film is made of a thermochromic material. The thickness of the thermochromic thin film disposed on the substrate is smaller than the thickness of the thermochromic thin film disposed on the nanodots.
    Type: Grant
    Filed: May 13, 2014
    Date of Patent: September 13, 2016
    Assignee: SAMSUNG CORNING PRECISION MATERIALS CO., LTD.
    Inventors: Yongwon Choi, Yung-Jin Jung, Chang Gyu Kim, Hyun Bin Kim
  • Publication number: 20150332802
    Abstract: Disclosed is a polyamide resin composition, which includes a polyamide resin and 5˜100 parts by weight of a polypropylene resin, 10˜135 parts by weight of glass fiber, and 0.1˜8 parts by weight of a phenolic heat-resistance agent, based on 100 parts by weight of the polyamide resin, and which also has low ion release, few changes in properties even when being exposed to external environment of high or low temperature, and high productivity, thus making it easy to serve as a material for a humidifier for a fuel cell membrane for vehicles.
    Type: Application
    Filed: December 30, 2013
    Publication date: November 19, 2015
    Applicant: KOLON PLASTICS, INC.
    Inventors: Heon Kyu JEONG, Chang Gyu KIM
  • Patent number: 9146408
    Abstract: A thermochromic window that can effectively insulate heat when warming is conducted in winter. The thermochromic window that includes a substrate, a thermochromic thin film formed on the substrate, and a transparent conductive film formed on at least one surface of the upper surface and the undersurface of the thermochromic thin film. The emissivity of the transparent conductive film is lower than the emissivity of the thermochromic thin film.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: September 29, 2015
    Assignee: Corning Precision Materials Co., Ltd.
    Inventors: Seulgi Bae, Sang-Ryoun Ryu, Chang Gyu Kim, Hyun Bin Kim, Dong-Gun Moon, Young Soo Jung, Yung-Jin Jung, Jee Yun Cha, Yong Won Choi
  • Publication number: 20140333984
    Abstract: A thermochromic window, the sunlight transmittance of which is adjustable depending on temperature, and a method of fabricating the same. The thermochromic window includes a substrate, a plurality of nanodots formed on the substrate, and a thermochromic thin film coating the substrate and the nanodots. The thermochromic thin film is made of a thermochromic material. The thickness of the thermochromic thin film disposed on the substrate is smaller than the thickness of the thermochromic thin film disposed on the nanodots.
    Type: Application
    Filed: May 13, 2014
    Publication date: November 13, 2014
    Applicant: SAMSUNG CORNING PRECISION MATERIALS CO., LTD.
    Inventors: Yongwon CHOI, Yung-Jin JUNG, Chang Gyu KIM, Hyun Bin KIM
  • Publication number: 20140228492
    Abstract: Disclosed is a polyamide resin composition for a wheel cover, which has an excellent balance between rigidity and toughness, improved low temperature impact property, excellent heat resistance, and improved strength of the surface of the composition and the weld. In particular, the polyamide resin composition comprises a polyamide 6 resin, an ethylene-based copolymer, a styrene-based copolymer, a maleic anhydride grafted styrene, an imide-based copolymer, nano-minerals, and a phenolic heat-resistant material.
    Type: Application
    Filed: July 8, 2013
    Publication date: August 14, 2014
    Inventors: Duck-Hyoung Hwang, Yong-Chul Lee, Sung-Woo Lee, Chang-Gyu Kim, Ji-Hyuk Park
  • Publication number: 20130335803
    Abstract: A thermochromic window that can effectively insulate heat when warming is conducted in winter. The thermochromic window that includes a substrate, a thermochromic thin film formed on the substrate, and a transparent conductive film formed on at least one surface of the upper surface and the undersurface of the thermochromic thin film. The emissivity of the transparent conductive film is lower than the emissivity of the thermochromic thin film.
    Type: Application
    Filed: June 13, 2013
    Publication date: December 19, 2013
    Inventors: Seulgi Bae, Sang-Ryoun Ryu, Chang Gyu Kim, Hyun Bin Kim, Dong-Gun Moon, Young Soo Jung, Yung-Jin Jung, Jee Yun Cha, Yong Won Choi
  • Patent number: D1064007
    Type: Grant
    Filed: August 16, 2022
    Date of Patent: February 25, 2025
    Assignee: TaeguTec Ltd.
    Inventors: Chang Gyu Park, Su Jin Ryu, Jae Seong Kim