Patents by Inventor Yue (Helen) Xu

Yue (Helen) Xu 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).

  • Reactive metal sources and deposition method for thioaluminate phosphors
    Patent number: 7622149
    Abstract: A physical vapor deposition method for the deposition of thioaluminate phosphor compositions includes providing one or more source materials including an intermetallic barium aluminum compound, a barium aluminum alloy or a protected barium metal, providing an activator species and effecting deposition of the one or more source materials and activator species as a phosphor composition on a selected substrate. The method allows for the deposition of blue thin film electroluminescent phosphors with high luminance and colors required for TV applications.
    Type: Grant
    Filed: March 4, 2005
    Date of Patent: November 24, 2009
    Assignee: Ifire IP Corporation
    Inventors: Yue (Helen) Xu, Alexander Kosyachkov, Guo Liu, Xingwei Wu, Joe Acchione
  • Fine-grained rare earth activated zinc sulfide phosphors for electroluminescent displays
    Patent number: 7534504
    Abstract: An improved fine grained zinc sulfide phosphor is provided for use in ac electroluminescent displays. The fine-grained zinc sulfide phosphor film exhibits improved luminance and may be used in conjunction with a structure or substance to minimize or prevent reaction of the fine grained phosphor with oxygen. The invention is particularly applicable to zinc sulfide phosphors used in electroluminescent displays that employ thick dielectric layers subject to high processing temperatures to form and activate the phosphor films.
    Type: Grant
    Filed: August 27, 2003
    Date of Patent: May 19, 2009
    Assignee: Ifire IP Corporation
    Inventors: Guo Liu, Alexander Kosyachkov, Yue (Helen) Xu, James Alexander Stiles
  • Reactive metal sources and deposition method for thioaluminate phosphors
    Publication number: 20050202162
    Abstract: A physical vapour deposition method for the deposition of thioaluminate phosphor compositions includes providing one or more source materials including an intermetallic barium aluminum compound, a barium aluminum alloy or a protected barium metal, providing an activator species and effecting deposition of the one or more source materials and activator species as a phosphor composition on a selected substrate. The method allows for the deposition of blue thin film electroluminescent phosphors with high luminance and colors required for TV applications.
    Type: Application
    Filed: March 4, 2005
    Publication date: September 15, 2005
    Inventors: Yue (Helen) Xu, Alexander Kosyachkov, Guo Liu, Xingwei Wu, Joe Acchione