Patents by Inventor Naoyuki Itou

Naoyuki Itou 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 electroluminescent display device
    Patent number: 7786666
    Abstract: An organic electroluminescent display device with an extended lifetime is provided. When at least a hole transport layer HTR, a light emitting layer LUM, an electron transport layer ETR and an electron injection layer EIN are stacked between one electrode (an anode AND or a cathode CTD) formed on the principal surface of an insulating substrate SUB1 and the other electrode (the cathode CTD or the anode AND) by vapor deposition, the concentration of a plasticizer trapped into the layers in a vapor deposition apparatus is limited to less than or equal to 100 ppm.
    Type: Grant
    Filed: September 26, 2006
    Date of Patent: August 31, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Masaaki Okunaka, Masato Ito, Masamitsu Furuie, Hironori Toyoda, Naoyuki Itou
  • Organic electroluminescent display device
    Publication number: 20070069640
    Abstract: An organic electroluminescent display device with an extended lifetime is provided. When at least a hole transport layer HTR, a light emitting layer LUM, an electron transport layer ETR and an electron injection layer EIN are stacked between one electrode (an anode AND or a cathode CTD) formed on the principal surface of an insulating substrate SUB1 and the other electrode (the cathode CTD or the anode AND) by vapor deposition, the concentration of a plasticizer trapped into the layers in a vapor deposition apparatus is limited to less than or equal to 100 ppm.
    Type: Application
    Filed: September 26, 2006
    Publication date: March 29, 2007
    Inventors: Masaaki Okunaka, Masato Ito, Masamitsu Furuie, Hironori Toyoda, Naoyuki Itou