Patents by Inventor Dong-Ho Yoon

Dong-Ho Yoon 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: 11649544
    Abstract: A method for depositing a large-area graphene layer and an apparatus for continuous graphene deposition using the same are disclosed. The method can include forming a titanium (Ti) layer on a substrate by sputtering, reducing the titanium layer by spraying a reductant gas containing a hydrogen gas (H2) and a purge gas onto the titanium layer while moving in a first direction in relation to the substrate and exhausting the reductant gas and the purge gas. The method can also include forming graphene by spraying a reactant gas containing a graphene source and the purge gas onto the titanium layer while moving in a second direction opposite the first direction in relation to the substrate and exhausting the reactant gas and the purge gas.
    Type: Grant
    Filed: December 9, 2020
    Date of Patent: May 16, 2023
    Assignee: KUK-IL GRAPHENE CO., LTD
    Inventors: Dong Ho Yoon, Chul Kyu Song, Ji Hye Han, Soon Gil Yoon, Ji Ho Eom
  • Publication number: 20210172059
    Abstract: A method for depositing a large-area graphene layer and an apparatus for continuous graphene deposition using the same are disclosed. The method can include forming a titanium (Ti) layer on a substrate by sputtering, reducing the titanium layer by spraying a reductant gas containing a hydrogen gas (H2) and a purge gas onto the titanium layer while moving in a first direction in relation to the substrate and exhausting the reductant gas and the purge gas. The method can also include forming graphene by spraying a reactant gas containing a graphene source and the purge gas onto the titanium layer while moving in a second direction opposite the first direction in relation to the substrate and exhausting the reactant gas and the purge gas.
    Type: Application
    Filed: December 9, 2020
    Publication date: June 10, 2021
    Inventors: Dong Ho Yoon, Chul Kyu Song, Ji Hye Han, Soon Gil Yoon, Ji Ho Eom
  • Patent number: 8859663
    Abstract: The present invention relates to a calcium carbonate having a surface charge, the preparing process thereof and filler for producing a paper using the same. The present invention provides the process of preparing a calcium carbonate having a surface charge, characterized in that it comprises the following steps of: preparing a solution mixture of one or more monomer selected from the group consisting of calcium hydroxide, acrylic acid, acrylamide, or [2-(acryloyloxy)ethyl]-trimethylammonium chloride; removing dissolved gases such as oxygen and carbon dioxide in the said solution by injecting nitrogen (N2) gas; adjusting pH of the said solution; and inducing a reaction by adding polymerization initiator of a high molecule while injecting carbon dioxide to the said mixture.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: October 14, 2014
    Assignee: Hankuk Paper Mfg. Co., Ltd.
    Inventors: Dong Ho Yoon, Seong Dal Heo, Seung Suk Seo, In Woo Cheong
  • Patent number: 8797346
    Abstract: A gamma correction system and method for a display device are disclosed. According to one aspect, the gamma correction system includes a display panel configured to display an image, a measuring unit configured to acquire optical characteristic information from the image displayed on the display panel, and a display panel driver configured to convert a gamma data result value obtained after performing optical compensation for at least two sample gray values among a plurality of reference luminance values into a corresponding data voltage and calculate a data voltage for the rest of the luminance values for which optical compensation is not performed.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: August 5, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sung-Un Park, Ji-Yun Son, Dong-Ho Yoon
  • Publication number: 20130164206
    Abstract: The present invention relates to a calcium carbonate having a surface charge, the preparing process thereof and filler for producing a paper using the same. The present invention provides the process of preparing a calcium carbonate having a surface charge, characterized in that it comprises the following steps of: preparing a solution mixture of one or more monomer selected from the group consisting of calcium hydroxide, acrylic acid, acrylamide, or [2-(acryloyloxy)ethyl]-trimethylammonium chloride; removing dissolved gases such as oxygen and carbon dioxide in the said solution by injecting nitrogen (N2) gas; adjusting pH of the said solution; and inducing a reaction by adding polymerization initiator of a high molecule while injecting carbon dioxide to the said mixture.
    Type: Application
    Filed: March 21, 2012
    Publication date: June 27, 2013
    Applicant: HANKUK PAPER MFG, CO, LTD.
    Inventors: Dong Ho YOON, Seoung Dal HEO, Seung Suk SEO, In Woo CHEONG
  • Publication number: 20130120659
    Abstract: A gamma correction system and method for a display device are disclosed. According to one aspect, the gamma correction system includes a display panel configured to display an image, a measuring unit configured to acquire optical characteristic information from the image displayed on the display panel, and a display panel driver configured to convert a gamma data result value obtained after performing optical compensation for at least two sample gray values among a plurality of reference luminance values into a corresponding data voltage and calculate a data voltage for the rest of the luminance values for which optical compensation is not performed.
    Type: Application
    Filed: March 14, 2012
    Publication date: May 16, 2013
    Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.
    Inventors: Sung-Un Park, Ji-Yun Son, Dong-Ho Yoon