Patents by Inventor Mi Eun KANG

Mi Eun KANG 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).

  • Polyimide-based resin film, substrate for display device, and optical device using the same
    Patent number: 12577357
    Abstract: The present disclosure relates to a polyimide-based resin film wherein a thermal hysteresis gap at a temperature of 50° C. or more and 150° C. or less is 100 ?m or more and 500 ?m or less, and a substrate for display device, and an optical device using the same.
    Type: Grant
    Filed: August 22, 2022
    Date of Patent: March 17, 2026
    Assignee: LG CHEM, LTD.
    Inventors: Ye Ji Hong, Mi Eun Kang
  • POLYIMIDE-BASED POLYMER FILM, SUBSTRATE FOR DISPLAY DEVICE, AND OPTICAL DEVICE USING THE SAME
    Publication number: 20240294710
    Abstract: The present disclosure relates to a polyimide-based resin film in which a refractive index difference (?n) obtained by Equation 1 is 0.0068 or less, and a yellow index at a thickness of 10 ?m is 5.5 or less, and a substrate for display device, and an optical device using the same.
    Type: Application
    Filed: May 17, 2022
    Publication date: September 5, 2024
    Applicant: LG CHEM, LTD.
    Inventors: Mi Eun KANG, Ye Ji HONG, Chan Hyo PARK, Hangah PARK, Min Wook LEE
  • POLYIMIDE-BASED POLYMER FILM, SUBSTRATE FOR DISPLAY DEVICE, AND OPTICAL DEVICE USING THE SAME
    Publication number: 20240287266
    Abstract: The present disclosure relates to a polyimide-based polymer film comprising a polyimide-based polymer which contains a polyimide repeating unit represented by Chemical Formula 1 and a polyimide repeating unit represented by Chemical Formula 2, and a substrate for display device and an optical device using the same.
    Type: Application
    Filed: March 10, 2023
    Publication date: August 29, 2024
    Applicant: LG CHEM, LTD.
    Inventors: Mi Eun KANG, Chan Hyo PARK, Jinyoung PARK, Chae Won PARK
  • Polyimide precursor composition and polyimide film, substrate for display device, and optical device prepared by using same
    Patent number: 12060456
    Abstract: The present disclosure provides a polyimide film having improved heat resistance and refractive index by using a polyimide precursor composition comprising a diamine of Chemical Formula 1 and an acid dianhydride of Chemical Formula 2 as polymerization components, thereby reducing the difference in refractive index from the upper layer to improve bottom emission efficiency.
    Type: Grant
    Filed: January 28, 2020
    Date of Patent: August 13, 2024
    Assignee: LG CHEM, LTD.
    Inventors: Jiyeon Sung, Hoyong Lee, Cheol Jun Song, Kyunghwan Kim, Mi Eun Kang
  • POLYIMIDE-BASED POLYMER FILM, SUBSTRATE FOR DISPLAY DEVICE, AND OPTICAL DEVICE USING THE SAME
    Publication number: 20240092974
    Abstract: The present disclosure relates to a polyimide-based resin film comprising a polyimide-based resin containing a polyimide repeating unit represented by Chemical Formula 1 and a polyimide repeating unit represented by Chemical Formula 2, a substrate for display device, and an optical device using the same.
    Type: Application
    Filed: September 14, 2022
    Publication date: March 21, 2024
    Applicant: LG CHEM, LTD.
    Inventors: Mi Eun KANG, Chan Hyo PARK, Jinyoung PARK, Chae Won PARK, Min Wook LEE
  • POLYIMIDE-BASED RESIN FILM, SUBSTRATE FOR DISPLAY DEVICE, AND OPTICAL DEVICE USING THE SAME
    Publication number: 20240034848
    Abstract: The present disclosure relates to a polyimide-based resin film wherein a thermal hysteresis gap at a temperature of 50° C. or more and 150° C. or less is 100 ?m or more and 500 ?m or less, and a substrate for display device, and an optical device using the same.
    Type: Application
    Filed: August 22, 2022
    Publication date: February 1, 2024
    Applicant: LG CHEM, LTD.
    Inventors: Ye Ji HONG, Mi Eun KANG
  • POLYIMIDE PRECURSOR COMPOSITION AND POLYIMIDE FILM, SUBSTRATE FOR DISPLAY DEVICE, AND OPTICAL DEVICE PREPARED BY USING SAME
    Publication number: 20210238351
    Abstract: The present disclosure provides a polyimide film having improved heat resistance and refractive index by using a polyimide precursor composition comprising a diamine of Chemical Formula 1 and an acid dianhydride of Chemical Formula 2 as polymerization components, thereby reducing the difference in refractive index from the upper layer to improve bottom emission efficiency.
    Type: Application
    Filed: January 28, 2020
    Publication date: August 5, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Jiyeon SUNG, Hoyong LEE, Cheol Jun SONG, Kyunghwan KIM, Mi Eun KANG