Patents Assigned to Youmin Liu
  • Double-sided electroluminescent device
    Patent number: 5786664
    Abstract: A double-sided electroluminescent device emits light from its both sides and has a symmetrically laminated structure. The materials of the insulating layers and the binder of the phosphor layer are the same. The insulating layers and transparent insulating frame form a sealing box to encapsulate the phosphor layer. The bus bars are disposed oppositely in symmetry with respective to the symmetrical plane and a vertical axis of the device. The refractive index of the out most reinforcement layer is higher than that of the substrates.
    Type: Grant
    Filed: March 27, 1995
    Date of Patent: July 28, 1998
    Assignee: Youmin Liu
    Inventor: Youmin Liu