Patents by Inventor Yun-Bong Kim

Yun-Bong 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).

  • BIAXIAL LIQUID CRYSTAL COMPOUND, LIQUID CRYSTAL COMPOSITION COMPRISING THE SAME, AND OPTICAL FILM USING THE SAME LIQUID CRYSTAL COMPOSITION
    Publication number: 20100078594
    Abstract: Disclosed are a biaxial liquid crystal compound, a liquid crystal composition comprising the same, and an optical film using the same liquid crystal composition. More particularly, there is provided a liquid crystal material of a viewing angle compensation film with high quality characteristics, which can improve a contrast ratio and minimize variations in color with viewing angles in a black state, a liquid crystal composition comprising the same liquid crystal material, and a compensation film obtained from the same liquid crystal composition.
    Type: Application
    Filed: January 22, 2008
    Publication date: April 1, 2010
    Inventors: Jae-Ho Cheong, Min-Jin Ko, Myung-Sun Moon, Bum-Gyu Choi, Dae-Ho Kang, Ki-Youl Lee, Yun-Bong Kim
  • FLUORENE DERIVATIVE, LIQUID CRYSTAL COMPOSITION COMPRISING THE SAME, AND OPTICAL FILM USING THE SAME LIQUID CRYSTAL COMPOSITION
    Publication number: 20100059712
    Abstract: Disclosed are a novel fluorene derivative, a liquid crystal composition comprising the same, and an optical film using the same liquid crystal composition. More particularly, there are provided a liquid crystal material for a viewing angle compensation film with high quality characteristics, which can improve a contrast ratio measured at an oblique angle to the front and minimize variations in color with viewing angles in a black state, a liquid crystal composition comprising the same liquid crystal material, and a compensation film obtained from the same liquid crystal composition.
    Type: Application
    Filed: January 22, 2008
    Publication date: March 11, 2010
    Inventors: Jae-Ho Cheong, Min-Jin Ko, Myung-Sun Moon, Bum-Gyu Choi, Dae-Ho Kang, Ki-Youl Lee, Yun-Bong Kim
  • Novel pyran derivative, its preparation method, liquid crystal composition and liquid crystal display device comprising the same
    Publication number: 20100059710
    Abstract: The present invention relates to a pyran derivative which manifests appropriate refractive anisotropy (optical anisotropy) and liquid crystal transition temperature and excellent dielectric anisotropy, and has excellent compatibility with various liquid crystal compounds, and thus, can be preferably used for the formation of a liquid crystal layer of a liquid crystal display device, its preparation method, a liquid crystal composition and liquid crystal display device comprising the same.
    Type: Application
    Filed: September 9, 2009
    Publication date: March 11, 2010
    Inventors: Bum-Gyu Choi, Min-Jin Ko, Myung-Sun Moon, Jae-Ho Cheong, Dae-Ho Kang, Ki-Youl Lee, Yun-Bong Kim
  • NOVEL LIQUID CRYSTAL COMPOUND, LIQUID CRYSTAL COMPOSITION COMPRISING THE SAME, AND OPTICAL FILM USING THE SAME LIQUID CRYSTAL COMPOSITION
    Publication number: 20100051867
    Abstract: Disclosed is a novel liquid crystal compound, a liquid crystal composition comprising the same, and an optical film using the same liquid crystal composition. More particularly, there is provided a liquid crystal material of a viewing angle compensation film with high quality characteristics, which can improve a contrast ratio and minimize variations in color with viewing angles in a black state, a liquid crystal composition comprising the same liquid crystal material, and a compensation film obtained from the same liquid crystal composition.
    Type: Application
    Filed: January 22, 2008
    Publication date: March 4, 2010
    Inventors: Jae-Ho Cheong, Min-Jin Ko, Myung-Sun Moon, Bum-Gyu Choi, Dae-Ho Kang, Ki-Youl Lee, Yun-Bong Kim