Patents Assigned to Asashi Kasei Kogyo Kabushiki Kaisha
  • Patent number: 5281489
    Abstract: Disclosed is an electroluminescent element comprising an anode, a cathode and, disposed therebetween, an organic luminescent layer comprising a mixture of a fluorescent luminescent agent, at least one hole moving and donating agent capable of moving holes and donating the same to the luminescent agent and at least one electron moving and donating agent capable of moving electrons and donating the same to the luminescent agent. In the element, the components of the luminescent layer have specific oxidation potential and reduction potential relationships. The element emits light in response to electrical signals. The element exhibits high luminescence efficiency and brightness even at low voltages, and it can efficiently be produced at low cost.
    Type: Grant
    Filed: September 16, 1991
    Date of Patent: January 25, 1994
    Assignee: Asashi Kasei Kogyo Kabushiki Kaisha
    Inventors: Yoshihiko Mori, Hiroshi Endo