Patents by Inventor Hiroshi Takehisa

Hiroshi Takehisa 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 EL device
    Patent number: 8227980
    Abstract: The organic EL device (1) comprises: a substrate (2); a light emitting unit formed on the substrate (2), and including an anode (11), a cathode (7) having anelectric resistance lower than that of the anode (11), an organic light emitting layer (6) formed between the anode (11) and the cathode (7); an anode terminal (12) formed on the substrate (2) and connected to the anode (11), and a cathode terminal (16) formed on the substrate (2) and connected to the cathode (7). A surface of the anode terminal (12) connected to the external is applied into an anode connecting surface (12a), and a surface of the cathode terminal (16) connected to the external is applied into a cathode connecting face (16a). The size (S1) of the anode connecting surface (12a) is larger than the size (S2) of the cathode connecting surface (16a).
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: July 24, 2012
    Assignee: Rohm Co., Ltd.
    Inventors: Norifumi Kawamura, Kohichi Mori, Hideyuki Kobayashi, Hiroshi Takehisa
  • ORGANIC EL DEVICE
    Publication number: 20110025197
    Abstract: The organic EL device (1) comprises: a substrate (2); a light emitting unit formed on the substrate (2), and including an anode (11), a cathode (7) having anelectric resistance lower than that of the anode (11), an organic light emitting layer (6) formed between the anode (11) and the cathode (7); an anode terminal (12) formed on the substrate (2) and connected to the anode (11), and a cathode terminal (16) formed on the substrate (2) and connected to the cathode (7). A surface of the anode terminal (12) connected to the external is applied into an anode connecting surface (12a), and a surface of the cathode terminal (16) connected to the external is applied into a cathode connecting face (16a). The size (S1) of the anode connecting surface (12a) is larger than the size (S2) of the cathode connecting surface (16a).
    Type: Application
    Filed: March 31, 2009
    Publication date: February 3, 2011
    Applicant: Rohm Co., Ltd.
    Inventors: Norifumi Kawamura, Kohichi Mori, Hideyuki Kobayashi, Hiroshi Takehisa