Patents Examined by Ling Yu
  • Organic electroluminescent device
    Patent number: 6406804
    Abstract: The invention provides an organic EL device which produces high luminance and is durable and which can be fabricated with ease. The organic EL device comprises two electrodes and a light-emitting layer sandwiched therebetween, in which the light-emitting layer contains a molecular compound having an electron-transporting unit and a hole-transporting unit bonded to each other via a linking group.
    Type: Grant
    Filed: February 1, 2000
    Date of Patent: June 18, 2002
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Hisahiro Higashi, Chishio Hosokawa