Patents by Inventor Zhi-Yuan Xie

Zhi-Yuan Xie 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).

  • Organic electroluminescence devices using pyrazolo[3,4b]quinoxaline derivatives
    Patent number: 6861162
    Abstract: An organic electroluminescence device which includes an anode, a cathode, a hole transport layer, an electron transport layer, and at least one organic luminescent medium doped with a pyrazolo[3,4b]quinoxaline derivative is disclosed. The present device provides improved efficiency, and the emission band associated therewith is surprisingly narrow. The improved green emitting organic electroluminescence device exhibits high color purity.
    Type: Grant
    Filed: August 28, 2002
    Date of Patent: March 1, 2005
    Assignee: CityU Research Ltd.
    Inventors: Shuit-Tong Lee, Chun-Sing Lee, Peng-Fei Wang, Zhi-Yuan Xie
  • Electroluminescent devices
    Patent number: 6833202
    Abstract: Organic electroluminescence devices are described, each of which comprises an anode, a cathode, a luminescent layer, at least one hole-transporting layer disposed between the anode and the luminescent layer, at least one electron-transporting layer disposed between the cathode and the luminescent layer, and a substrate present on either the anode or cathode. The luminescent layer in the devices uses as red-emitting materials, salicylaldiminato Schiff bases or their metal complexes based on diaminomaleonitrile and salicylaldehyde derivatives. These organic electroluminescence devices exhibit excellent color chromaticity co-ordinates and good efficiency.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: December 21, 2004
    Assignee: City University of Hong Kong
    Inventors: Shuit-Tong Lee, Chun-Sing Lee, Peng-Fei Wang, Zhi-Yuan Xie
  • Electroluminescent devices
    Publication number: 20040180234
    Abstract: Organic electroluminescence devices are described, each of which comprises an anode, a cathode, a luminescent layer, at least one hole-transporting layer disposed between the anode and the luminescent layer, at least one electron-transporting layer disposed between the cathode and the luminescent layer, and a substrate present on either the anode or cathode. The luminescent layer in the devices uses as red-emitting materials, salicylaldiminato Schiff bases or their metal complexes based on diaminomaleonitrile and salicylaldehyde derivatives. These organic electroluminescence devices exhibit excellent color chromaticity co-ordinates and good efficiency.
    Type: Application
    Filed: March 13, 2003
    Publication date: September 16, 2004
    Inventors: Shuit-Tong Lee, Chun-Sing Lee, Peng-Fei Wang, Zhi-Yuan Xie
  • Organic electroluminescence devices using pyrazolo [3,4B] quinoxaline derivatives
    Publication number: 20040043247
    Abstract: An organic electroluminescence device which includes an anode, a cathode, a hole transport layer, an electron transport layer, and at least one organic luminescent medium doped with a pyrazolo[3,4b]quinoxaline derivative is disclosed. The present device provides improved efficiency, and the emission band associated therewith is surprisingly narrow. The improved green emitting organic electroluminescence device exhibits high color purity.
    Type: Application
    Filed: August 28, 2002
    Publication date: March 4, 2004
    Inventors: Shuit-Tong Lee, Chun-Sing Lee, Peng-Fei Wang, Zhi-Yuan Xie