Patents by Inventor Yongbum CHA

Yongbum CHA 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).

  • Compound and organic light-emitting device using same
    Patent number: 9728728
    Abstract: The present invention provides a novel compound that is capable of largely improving a life span, efficiency, electrochemical stability and thermal stability of an organic light emitting device, and an organic light emitting device in which the compound is included in an organic compound layer.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: August 8, 2017
    Assignee: LG CHEM, LTD.
    Inventors: Sung Kil Hong, Yun Hwan Kim, Jungoh Huh, Seongmi Cho, Seong So Kim, Yongbum Cha
  • Compound and organic light-emitting device using same
    Patent number: 9373793
    Abstract: The present invention provides a novel compound that is capable of largely improving a life span, efficiency, electrochemical stability and thermal stability of an organic light emitting device, and an organic light emitting device in which the compound is included in an organic compound layer.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: June 21, 2016
    Assignee: LG CHEM, LTD.
    Inventors: Sung Kil Hong, Yun Hwan Kim, Jungoh Huh, Seongmi Cho, Seong So Kim, Yongbum Cha
  • POLYCYCLIC COMPOUND AND ORGANIC LIGHT EMITTING DEVICE INCLUDING THE SAME
    Publication number: 20160087216
    Abstract: The present specification provides a polycyclic compound and an organic light emitting device including the same.
    Type: Application
    Filed: September 22, 2015
    Publication date: March 24, 2016
    Inventors: Jin Joo KIM, Sung Kil HONG, Yongbum CHA
  • NOVEL COMPOUND AND ORGANIC LIGHT-EMITTING DEVICE USING SAME
    Publication number: 20140183489
    Abstract: The present invention provides a novel compound that is capable of largely improving a life span, efficiency, electrochemical stability and thermal stability of an organic light emitting device, and an organic light emitting device in which the compound is included in an organic compound layer.
    Type: Application
    Filed: June 20, 2012
    Publication date: July 3, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Sung Kil Hong, Yun Hwan Kim, Jungoh Huh, Seongmi Cho, Seong So Kim, Yongbum Cha
  • NOVEL COMPOUND AND ORGANIC LIGHT-EMITTING DEVICE USING SAME
    Publication number: 20140091298
    Abstract: The present invention provides a novel compound that is capable of largely improving a life span, efficiency, electrochemical stability and thermal stability of an organic light emitting device, and an organic light emitting device in which the compound is included in an organic compound layer.
    Type: Application
    Filed: December 10, 2013
    Publication date: April 3, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Sung Kil HONG, Yun Hwan KIM, Jungoh HUH, Seongmi CHO, Seong So KIM, Yongbum CHA