Patents by Inventor Gyu Chan Cho

Gyu Chan Cho 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: 8501848
    Abstract: A polycarbonate resin composition for a flame retardant film includes 100 parts by weight of a polycarbonate resin, about 0.01 to about 10 parts by weight of a silicon compound, about 0.01 to about 1.5 parts by weight of an organic sulfonic acid metal salt having an average particle diameter of about 100 to about 400 ?m, and about 0.01 to about 1 part by weight of a polyfluoroethylene resin.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: August 6, 2013
    Assignee: Cheil Industries, Inc.
    Inventors: Chang Gyu Im, Sung Kook Kim, Jin Woo Lee, Cheol Ho Kim, Gyu Chan Cho, Sun Hong Park
  • Patent number: 8310759
    Abstract: A diffusing film may have a microlens pattern and an embossed pattern on the surface thereof. The diffusing film includes a light entrance plane for receiving incident light, a light exit plane opposite the light entrance plane, the light exit plane for transmitting light, a plurality of microlenses on a surface of the light exit plane of the diffusing film, microlenses of the plurality of microlenses being spaced apart from one another, and a separation plane between the plurality of microlenses, the separation plane having an embossed pattern on a surface thereof.
    Type: Grant
    Filed: March 17, 2011
    Date of Patent: November 13, 2012
    Assignee: Cheil Industries, Inc.
    Inventors: Jin Woo Lee, Gyu Chan Cho, Jong Kwan Kim, Jae Goo Doh
  • Publication number: 20120252947
    Abstract: A polycarbonate resin composition for a flame retardant film includes 100 parts by weight of a polycarbonate resin, about 0.01 to about 10 parts by weight of a silicon compound, about 0.01 to about 1.5 parts by weight of an organic sulfonic acid metal salt having an average particle diameter of about 100 to about 400 ?m, and about 0.01 to about 1 part by weight of a polyfluoroethylene resin.
    Type: Application
    Filed: June 18, 2012
    Publication date: October 4, 2012
    Inventors: Chang Gyu IM, Sung Kook KIM, Jin Woo LEE, Cheol Ho KIM, Gyu Chan CHO, Sun Hong PARK
  • Patent number: 8279370
    Abstract: An optical laminate film, a backlight unit, and a liquid crystal display module, the optical laminate film including a multilayer film composed of multiple layers including at least two polymers having different refractive indexes, the multilayer film transmitting only a light component vibrating in a direction parallel to one transmittance axis while reflecting other light components; an embossed diffusing film laminated on one side of the multilayer film, the embossed diffusing film having roughness on a surface thereof; and a microlens film laminated on another side of the multilayer film, the microlens film having microlenses arranged on a surface thereof.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: October 2, 2012
    Assignee: Cheil Industries, Inc.
    Inventors: Jin Woo Lee, Gyu Chan Cho, Sun Hong Park, Sei Jin Oh
  • Publication number: 20110164321
    Abstract: A diffusing film may have a microlens pattern and an embossed pattern on the surface thereof. The diffusing film includes a light entrance plane for receiving incident light, a light exit plane opposite the light entrance plane, the light exit plane for transmitting light, a plurality of microlenses on a surface of the light exit plane of the diffusing film, microlenses of the plurality of microlenses being spaced apart from one another, and a separation plane between the plurality of microlenses, the separation plane having an embossed pattern on a surface thereof.
    Type: Application
    Filed: March 17, 2011
    Publication date: July 7, 2011
    Inventors: Jin Woo LEE, Gyu Chan CHO, Jong Kwan KIM, Jae Gao DOH
  • Publication number: 20110116014
    Abstract: An optical laminate film, a backlight unit, and a liquid crystal display module, the optical laminate film including a multilayer film composed of multiple layers including at least two polymers having different refractive indexes, the multilayer film transmitting only a light component vibrating in a direction parallel to one transmittance axis while reflecting other light components; an embossed diffusing film laminated on one side of the multilayer film, the embossed diffusing film having roughness on a surface thereof; and a microlens film laminated on another side of the multilayer film, the microlens film having microlenses arranged on a surface thereof.
    Type: Application
    Filed: November 15, 2010
    Publication date: May 19, 2011
    Inventors: Jin Woo Lee, Gyu Chan Cho, Sun Hong Park, Sei Jin Oh
  • Patent number: 7936517
    Abstract: A method of extrusion molding a prism film and a prism film manufactured by the same, the method including providing a molten film, simultaneously forming a prism pattern and an embossed pattern on opposite surfaces of the molten film by passing the molten film through a gap between a prism roll and an emboss roll, and cooling the molten film having the prism pattern and the embossed pattern on opposite surfaces thereof.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: May 3, 2011
    Assignee: Cheil Industries, Inc.
    Inventors: Gyu Chan Cho, Jin Woo Lee, Sun Hong Park, Jong Kwan Kim
  • Publication number: 20100149648
    Abstract: A method of extrusion molding a prism film and a prism film manufactured by the same, the method including providing a molten film, simultaneously forming a prism pattern and an embossed pattern on opposite surfaces of the molten film by passing the molten film through a gap between a prism roll and an emboss roll, and cooling the molten film having the prism pattern and the embossed pattern on opposite surfaces thereof.
    Type: Application
    Filed: December 10, 2009
    Publication date: June 17, 2010
    Inventors: Gyu Chan Cho, Jin Woo Lee, Sun Hong Park, Jong Kwan Kim