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Display device having light-emitting elements including metals

  • US 9,595,573 B2
  • Filed: 01/20/2016
  • Issued: 03/14/2017
  • Est. Priority Date: 12/12/2002
  • Status: Expired due to Term
First Claim
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1. A display device comprising:

  • a plurality of light-emitting elements aligned on a TFT substrate in a formation of a matrix, the plurality of light-emitting elements each having a flat surface portion and including an anode, a light-emitting layer arranged on the anode, and a cathode arranged on the light-emitting layer;

    an insulation layer formed on the TFT substrate and under the light emitting element;

    a tilted metal which is provided on a peripheral area surrounding the flat surface portion of each of the plurality of light-emitting elements and has a tilt angle against the flat surface portion of each of the plurality of light-emitting elements; and

    an optical waveguide layer which is arranged on the cathode and includes a first layer and a second layer on the first layer, a first refraction index of the first layer being larger than a second refraction index of the second layer,wherein the tilted metal is provided on a surface of a slope of a bank that is provided on the insulation layer,wherein the bank covers an edge of the anode and has an opening exposing a part of a surface of the anode,wherein the optical waveguide layer is arranged directly above the part of the surface of the anode,wherein a width of a cross section of the bank becomes smaller as the cross section comes farther away from a surface of the TFT substrate,wherein a sealing film is placed on the plurality of light-emitting elements, the optical waveguide layer, the tilted metal, and the TFT substrate,wherein the light emitting element emits light in a direction from the TFT substrate to the sealing film, andwherein a first distance between the TFT substrate and a first top surface of the optical waveguide layer is smaller than a second distance between a second top surface of the bank and the TFT substrate.

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