Patents by Inventor Woonghyun Choi

Woonghyun Choi 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).

  • Pyrrole derivative and photosensitive film using the same
    Patent number: 7446166
    Abstract: The present invention relates to pyrrole derivatives and photosensitive film using the same and more particularly, the pyrrole derivatives consist of pyrrole units to allow polymerization chemically and electrochemically and a perylene diimide unit to absorb light so that perylene diimide film can be produced by crosslinking the pyrrole units by irradiation of visible light having wavelengths longer than 500 nm and become insoluble in most solvents. Such perylene diimide films can be widely used in the manufacture of electrical, electronical and optical devices such as photo diodes, solar batteries, liquid crystal displays, and luminescent diodes, etc.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: November 4, 2008
    Assignee: Industry - University Cooperation Foundation Sogang University
    Inventors: Hoosung Lee, Bongjin Moon, Heung Cho Ko, Woonghyun Choi, Suk-ho Kim
  • Pyrrole derivative and photosensitive film using the same
    Publication number: 20060234148
    Abstract: The present invention relates to pyrrole derivatives and photosensitive film using the same and more particularly, the pyrrole derivatives consist of pyrrole units to allow polymerization chemically and electrochemically and a perylene diimide unit to absorb light so that perylene diimide film can be produced by crosslinking the pyrrole units by irradiation of visible light having wavelengths longer than 500 nm and become insoluble in most solvents. Such perylene diimide films can be widely used in the manufacture of electrical, electronical and optical devices such as photo diodes, solar batteries, liquid crystal displays, and luminescent diodes, etc.
    Type: Application
    Filed: October 21, 2005
    Publication date: October 19, 2006
    Inventors: Hoosung Lee, Bongjin Moon, Heung Ko, Woonghyun Choi, Suk-ho Kim