Display apparatus

Patent metadata

Field	Value
Publication number	US-2025359440-A1
Application number	US-202519209581-A
Country	US
Kind code	A1
Filing date	May 15, 2025
Priority date	May 16, 2024
Publication date	Nov 20, 2025
Grant date	—

Abstract

A display apparatus includes a substrate, a first main light-emitting diode disposed on the substrate, a first sub light-emitting diode disposed on the substrate to be adjacent to the first main light-emitting diode, where the first sub light-emitting diode emits light of a same color as a color of light of the first main light-emitting diode, a bank layer defining a first main opening exposing the first main light-emitting diode and a first sub-opening exposing the first sub light-emitting diode, and a first central separator disposed on an upper surface of the bank layer, where when viewed in a direction perpendicular to the substrate, the first central separator is disposed between the first main opening and the first sub-opening.

First claim

What is claimed is:

1 . A display apparatus comprising:
a substrate; a first main light-emitting diode disposed on the substrate; a first sub light-emitting diode disposed on the substrate to be adjacent to the first main light-emitting diode, wherein the first sub light-emitting diode emits light of a same color as the first main light-emitting diode; a bank layer defining a first main opening exposing the first main light-emitting diode and a first sub-opening exposing the first sub light-emitting diode; and a first central separator disposed on an upper surface of the bank layer, wherein when viewed in a direction perpendicular to the substrate, the first central separator is arranged between the first main opening and the first sub-opening.

2 . The display apparatus of claim 1 , wherein the first central separator is defined by a trench shape of the bank layer in which a portion of the upper surface of the bank layer is concave.

3 . The display apparatus of claim 1 , wherein the first central separator is defined by a structure disposed on the upper surface of the bank layer, and a lateral surface of the first central separator includes a reverse tapered inclined surface.

4 . The display apparatus of claim 1 , wherein the first main light-emitting diode includes a first main pixel electrode, a first main intermediate layer on the first main pixel electrode, and a first main opposite electrode on the first main intermediate layer,
the first sub light-emitting diode includes a first sub-pixel electrode, a first sub-intermediate layer on the first sub-pixel electrode, and a first sub-opposite electrode on the first sub-intermediate layer, the first main intermediate layer and the first sub-intermediate layer are apart from each other with the first central separator therebetween, and the first main opposite electrode and the first sub-opposite electrode are apart from each other with the first central separator therebetween.

5 . The display apparatus of claim 4 , further comprising:
a dummy intermediate layer disposed between the first main intermediate layer and the first sub-intermediate layer when viewed in the direction perpendicular to the substrate; and a dummy opposite electrode disposed between the first main opposite electrode and the first sub-opposite electrode when viewed in the direction perpendicular to the substrate.

6 . The display apparatus of claim 5 , wherein the dummy intermediate layer and the dummy opposite electrode are disposed on the first central separator.

7 . The display apparatus of claim 5 , wherein the dummy intermediate layer is not electrically connected to the first main intermediate layer and the first sub-intermediate layer, and the dummy opposite electrode is not electrically connected to the first main opposite electrode and the first sub-intermediate layer.

8 . The display apparatus of claim 4 , wherein each of the first main intermediate layer and the first sub-intermediate layer has a stacked structure including a lower emission layer and an upper emission layer on the lower emission layer.

9 . The display apparatus of claim 8 , wherein each of the first main intermediate layer and the first sub-intermediate layer further includes a charge generation layer disposed between the lower emission layer and the upper emission layer.

10 . The display apparatus of claim 1 , further comprising:
a second main light-emitting diode disposed on the substrate, wherein the second main light-emitting diode emits light of a color different from a color of light of the first main light-emitting diode; and a second sub light-emitting diode disposed on the substrate to be adjacent to the second main light-emitting diode, wherein the second sub light-emitting diode emits light of a same color as a color of light of the second main light-emitting diode, wherein the bank layer further defines a second main opening exposing the second main light-emitting diode, and a second sub-opening exposing the second sub light-emitting diode.

11 . The display apparatus of claim 10 , further comprising a second central separator disposed on the upper surface of the bank layer, wherein when viewed in the direction perpendicular to the substrate, the second central separator is arranged between the second main opening and the second sub-opening.

12 . The display apparatus of claim 11 , wherein the first central separator and the second central separator are integrally formed with each other as a single unitary indivisible part.

13 . The display apparatus of claim 11 , wherein the first central separator and the second central separator are arranged to be apart from each other.

14 . The display apparatus of claim 10 , further comprising:
a first outer separator surrounding at least a portion of an outer portion of a first sub-pixel group including the first main light-emitting diode and the first sub light-emitting diode when viewed in the direction perpendicular to the substrate; and a second outer separator surrounding at least a portion of an outer portion of a second sub-pixel group including the second main light-emitting diode and the second sub light-emitting diode when viewed in the direction perpendicular to the substrate.

15 . The display apparatus of claim 14 , wherein, when viewed in the direction perpendicular to the substrate, the first outer separator and the second outer separator are arranged to be apart from each other between the first sub-pixel group and the second sub-pixel group.

16 . The display apparatus of claim 1 , further comprising:
an encapsulation layer disposed on the first main light-emitting diode and the first sub light-emitting diode; and a light-blocking layer disposed on the encapsulation layer, wherein, when viewed in the direction perpendicular to the substrate, the light-blocking layer defines a plurality of light-transmissive openings respectively overlapping the first main opening and the first sub-opening of the bank layer.

17 . The display apparatus of claim 16 , wherein the light-blocking layer includes a first light-blocking line and a second light-blocking line extending in directions crossing each other,
wherein the first light-blocking line overlaps each of the first main light-emitting diode and the first sub light-emitting diode when viewed in the direction perpendicular to the substrate, and the second light-blocking line is arranged to be adjacent to an opposite lateral surface of a lateral surface facing the first main light-emitting diode among lateral surfaces of the first sub light-emitting diode when viewed in the direction perpendicular to the substrate.

18 . The display apparatus of claim 1 , wherein the first main light-emitting diode and the first sub light-emitting diode respectively emit light according to different electrical signals from each other.

19 . The display apparatus of claim 1 , wherein, when viewed in the direction perpendicular to the substrate, an emission area of the first main light-emitting diode is greater than an emission area of the first sub light-emitting diode.

20 . A display apparatus comprising:
a substrate; a sub-pixel group disposed on the substrate and including a main light-emitting diode and a sub light-emitting diode, which emit light of a same color as each other and are disposed to be adjacent to each other; a bank layer defining a main opening exposing the main light-emitting diode, and a sub opening exposing the sub light-emitting diode; and a separato

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Seongmin
• Kim Minjae
• Chung Jinkoo

Classifications

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/873

  Encapsulations · CPC title

• H10K50/13

  comprising stacked EL layers within one EL unit · CPC title

• H10K50/19

  Tandem OLEDs · CPC title

• H10K59/88

  Dummy elements, i.e. elements having non-functional features · CPC title