Patents by Inventor Bum Gyu Chol

Bum Gyu Chol 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: 9045671
    Abstract: Disclosed are (A) an acrylic pressure-sensitive adhesive; and (B) an acrylic pressure-sensitive adhesive comprising an optically anisotropic compound having at least one substituent which contains an alkyl group, alkenyl group or alkynyl group at a meta-position of a mesogen. A polarizing plate and a liquid crystal display using the same are also disclosed. The optically anisotropic compound ensures excellent compatibility with the adhesive and high birefringence. Thus, main properties such as adhesion, reliability and durability in the conditions of high temperatures or high temperatures and high humidity are not worsened. Moreover light leakage is prevented by efficiently controlling the birefringence caused by shrinkage stress of the polarizing plate.
    Type: Grant
    Filed: February 2, 2009
    Date of Patent: June 2, 2015
    Assignee: LG Chem, Ltd.
    Inventors: In Cheon Han, Ki Seok Jang, Min Soo Park, Min Jin Ko, Bum Gyu Chol, Ik Hwan Cho, Ki Youl Lee
  • Publication number: 20110051051
    Abstract: Disclosed are (A) an acrylic pressure-sensitive adhesive; and (B) an acrylic pressure-sensitive adhesive comprising an optically anisotropic compound having at least one substituent which contains an alkyl group, alkenyl group or alkynyl group at a meta-position of a mesogen. A polarizing plate and a liquid crystal display using the same are also disclosed. The optically anisotropic compound ensures excellent compatibility with the adhesive and high birefringence. Thus, main properties such as adhesion, reliability and durability in the conditions of high temperatures or high temperatures and high humidity are not worsened. Moreover light leakage is prevented by efficiently controlling the birefringence caused by shrinkage stress of the polarizing plate.
    Type: Application
    Filed: February 2, 2009
    Publication date: March 3, 2011
    Inventors: In Cheon Han, Ki Seok Jang, Min Soo Park, Min Jin Ko, Bum Gyu Chol, Ik Hwan Cho, Ki Youl Lee