Patents by Inventor Jung Wan Han

Jung Wan Han 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: 9170355
    Abstract: A reflective polarizer of the invention has excellent optical properties even though a very small number of polymer components per unit area is disposed inside a matrix thereof compared to reflective polarizers of the related art, which include birefringent polymer, since the polymer inside the matrix has a plate-like shape. This is advantageous for covering the entire range of visible light, since a plate-like polymer having a variety of optical thicknesses can be used. The additional processing of bonding the skin layer is not performed, since the skin layer is formed on at least one surface of the core layer in the state in which it is molten. This can greatly reduce manufacturing costs, and is advantageous in that it maximizes optical properties in a limited thickness.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: October 27, 2015
    Assignee: WOONGJIN CHEMICAL CO., LTD.
    Inventors: Duk Jae Cho, Jung Wan Han, Myeong Ki Baek, Hwang Kyu Lee, Seung Jin Ko
  • Publication number: 20140043786
    Abstract: A reflective polarizer of the invention has excellent optical properties even though a very small number of polymer components per unit area is disposed inside a matrix thereof compared to reflective polarizers of the related art, which include birefringent polymer, since the polymer inside the matrix has a plate-like shape. This is advantageous for covering the entire range of visible light, since a plate-like polymer having a variety of optical thicknesses can be used. The additional processing of bonding the skin layer is not performed, since the skin layer is formed on at least one surface of the core layer in the state in which it is molten. This can greatly reduce manufacturing costs, and is advantageous in that it maximizes optical properties in a limited thickness.
    Type: Application
    Filed: February 7, 2012
    Publication date: February 13, 2014
    Applicant: Woongjin Chemical Co., Ltd.
    Inventors: Duk Jae Cho, Jung Wan Han, Myeong Ki Baek, Hwang Kyu Lee, Seung Jin Ko