Patents by Inventor Wakai Hitoshi

Wakai Hitoshi 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).

  • Patent number: 6624571
    Abstract: There is disclosed an electroluminescent (EL) device accomplishing improved visual performance. The device has a transparent substrate on which a transparent electrode layer is formed. The transparent electrode layer is partitioned into segments to represent desired shapes in terms of pixels by selective emission of the segments. Parts of the transparent electrode layer are brought out toward the outer periphery of the transparent substrate to form terminals. Display electrodes, the terminals, and conductive interconnects that are different in function are formed from the transparent electrode layer. The conductive interconnects connect the display electrodes with the terminals. Other terminals for connection with a back electrode are also formed from the transparent electrode layer. An auxiliary electrode layer having a resistivity smaller than that of the transparent electrode layer is formed on the transparent electrode layer.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: September 23, 2003
    Assignee: Nippon Seiki Co., Ltd.
    Inventors: Tadokoro Toyoyasu, Ohkawa Hiroshi, Wakai Hitoshi
  • Patent number: 6316879
    Abstract: A simple driver circuit used for an organic electroluminescent (EL) device comprises a transparent substrate on which an anode, at least one organic layer, and a cathode are formed. The anode is made of a transparent conductive material. The cathode is made of a conductive metal material. The driver circuit has a resistor electrically connected with the EL device to form a series circuit. A DC power supply is connected with this series circuit.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: November 13, 2001
    Assignee: Nippon Seiki Co., Ltd.
    Inventor: Wakai Hitoshi