Light emitting display device

Patent metadata

Field	Value
Publication number	US-12477901-B2
Application number	US-202217721865-A
Country	US
Kind code	B2
Filing date	Apr 15, 2022
Priority date	Sep 27, 2021
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

A light emitting display device includes an organic layer positioned on a substrate and including an anode connection opening, an anode positioned on the organic layer and having electrical connection through the anode connection opening, a black pixel defining layer including an anode exposing opening exposing the anode and including a black-colored organic material, a cathode positioned on the black pixel defining layer and the anode, and an encapsulation layer covering the cathode. The anode includes an anode center portion overlapping the anode exposing opening and having a triple layer structure, and an anode peripheral portion extending from the anode center portion and including a transparent conductive material. The triple-layer structure includes a lower layer and an upper layer that include a transparent conductive material, and a middle layer that includes a metal material and reflects light.

First claim

What is claimed is:

1 . A light emitting display device comprising:
an organic layer that is positioned on a substrate, and includes an anode connection opening; an anode that is positioned on the organic layer, and has electrical connection through the anode connection opening of the organic layer; a black pixel defining layer that includes an anode exposing opening exposing the anode, and includes a black-colored organic material; a cathode that is positioned on the black pixel defining layer and the anode; and an encapsulation layer that covers the cathode, wherein the anode comprises:
an anode center portion that overlaps the anode exposing opening of the black pixel defining layer, and has a triple-layer structure; and
an anode peripheral portion that extends from the anode center portion, and includes a transparent conductive material,
the triple-layer structure includes:
a lower layer and an upper layer that include a transparent conductive material; and
a middle layer that includes a metal material and reflects light,
the anode peripheral portion has a single-laver structure, and the upper layer of the anode center portion extends to form the anode peripheral portion.

2 . The light emitting display device of claim 1 , wherein the anode peripheral portion covers a side surface of the anode center portion.

3 . The light emitting display device of claim 1 , wherein a part of the anode center portion overlaps the black pixel defining layer.

4 . The light emitting display device of claim 3 , wherein a gap between the anode exposing opening of the black pixel defining layer and an end of the anode center portion is equal to or greater than about 1.5 μm and equal to or less than about 3.5 μm.

5 . The light emitting display device of claim 4 , wherein a gap between the anode exposing opening of the black pixel defining layer and an end of the anode peripheral portion is equal to or greater than about 5.5 μm and equal to or less than about 9.5 μm.

6 . The light emitting display device of claim 5 , further comprising:
a light blocking layer that is positioned on the encapsulation layer and includes a color filter opening; and a color filter that fills the color filter opening of the light blocking layer.

7 . The light emitting display device of claim 6 , wherein a gap between the color filter opening of the light blocking layer and the end of the anode center portion is larger than a gap between the color filter opening of the light blocking layer and the end of the anode peripheral portion.

8 . The light emitting display device of claim 7 , wherein the gap between the color filter opening of the light blocking layer and the end of the anode center portion is equal to or greater than about 3.5 μm and equal to or less than about 8.5 μm.

9 . The light emitting display device of claim 8 , wherein the gap between the color filter opening of the light blocking layer and the end of the anode peripheral portion is equal to or greater than about 1.0 μm and equal to or less than about 2.0 μm.

10 . The light emitting display device of claim 6 , wherein a gap between the color filter opening of the light blocking layer and the anode exposing opening of the black pixel defining layer is equal to or greater than about 4.5 μm and equal to or less than about 7.5 μm.

11 . The light emitting display device of claim 6 , further comprising:
a sensing electrode that overlaps the light blocking layer in a plan view, and is covered by the light blocking layer, wherein the anode connection opening of the organic layer overlaps the black pixel defining layer and the light blocking layer, and the anode connection opening of the organic layer overlaps at least a part of the sensing electrode in the plan view.

12 . The light emitting display device of claim 1 , wherein the anode further comprises:
an extension portion that extends from the anode center portion, and has the triple-layer structure.

13 . The light emitting display device of claim 12 , wherein a gap between the anode center portion and the anode connection opening is equal to or less than about 12 μm.

14 . The light emitting display device of claim 1 , wherein the transparent conductive material comprises at least one of an indium tin oxide (ITO), an indium zinc oxide (IZO), and a transparent conductive oxide (TCO).

15 . The light emitting display device of claim 14 , wherein the middle layer comprises at least one of silver (Ag), lithium (Li), calcium (Ca), aluminum (Al), magnesium (Mg), and gold (Au).

16 . The light emitting display device of claim 15 , wherein the lower layer and the upper layer comprise an indium tin oxide (ITO), and the middle layer comprises silver (Ag).

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Jun Hee

Classifications

• H10K50/813

  characterised by their shape · CPC title

• H10K50/822

  characterised by their shape · CPC title

• H10K50/818

  Reflective anodes, e.g. ITO combined with thick metallic layers · CPC title

• H10K50/865

  comprising light absorbing layers, e.g. light-blocking layers · CPC title

• H10K59/80521

  characterised by their shape · CPC title