Patents by Inventor Masatoshi Shiiiki

Masatoshi Shiiiki 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).

  • Image-display device
    Patent number: 6808829
    Abstract: An image-display device using phosphor can improve the its luminescence efficiency and characteristics of color coordinates by adding an IIA element to a host crystal of ZnS phosphor to form a composite crystal. The image-display device improves the luminescence efficiency and color coordinate characteristics by using a phosphor expressed by Zn(1−x)MIIAxS:MIB, MIII where MIIA is one or more IIA elements in periodic table of elements, MIB is one or more IB elements and MIII is one or more MIIIA elements such as Sc or Y.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: October 26, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Masaaki Komatsu, Masatoshi Shiiiki, Shin Imamura
  • Image-didplay device
    Publication number: 20030164670
    Abstract: The present invention provides an image-display device using a phosphor which can improve a luminescence efficiency and characteristics of color coordinates by adding a IIA element to a host crystal of a ZnS phosphor to make a compound crystal.
    Type: Application
    Filed: November 22, 2002
    Publication date: September 4, 2003
    Inventors: Masaaki Komatsu, Masatoshi Shiiiki, Shin Imamura