Display device

Patent metadata

Field	Value
Publication number	US-11730002-B2
Application number	US-202117382966-A
Country	US
Kind code	B2
Filing date	Jul 22, 2021
Priority date	Jul 28, 2020
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

A display device includes a first bank and a second bank spaced apart from each other on a substrate, at least one semiconductor layer disposed between the first bank and the second bank, a first electrode disposed on the first bank and electrically connected to a part of the at least one semiconductor layer, an organic functional layer disposed on another part of the semiconductor layer and comprising at least an organic light emitting layer, and a second electrode disposed on the organic functional layer.

First claim

What is claimed is:

1. A display device comprising:
a first bank and a second bank spaced apart from each other and disposed on a substrate;
at least one semiconductor layer disposed between the first bank and the second bank;
a first electrode disposed on the first bank and electrically connected to a part of the at least one semiconductor layer;
an organic functional layer disposed on another part of the at least one semiconductor layer and comprising an organic light emitting layer; and
a second electrode disposed on the organic functional layer.

2. The display device of claim 1 , wherein the at least one semiconductor layer comprises an n-type dopant and is made of a semiconductor having chemical formula:
Al x Ga y In 1-x-y N
wherein 0≤x≤1, 0≤y≤1 and 0≤x+y≤1.

3. The display device of claim 2 , wherein the organic functional layer comprises at least one of a hole transport layer and a hole injection layer between the organic light emitting layer and the second electrode.

4. The display device of claim 3 , wherein
the first electrode is a cathode electrode, and
the second electrode is an anode electrode.

5. The display device of claim 1 , wherein the at least one semiconductor layer comprises a p-type dopant and is made of a semiconductor having chemical formula:
Al x Ga y In 1-x-y N
wherein 0≤x≤1, 0≤y≤1 and 0≤x+y≤1.

6. The display device of claim 5 , wherein the organic functional layer comprises at least one of an electron transport layer and an electron injection layer between the organic light emitting layer and the second electrode.

7. The display device of claim 6 , wherein
the first electrode is an anode electrode, and
the second electrode is a cathode electrode.

8. The display device of claim 1 , wherein
the first electrode overlaps the first bank and extends parallel to the first bank, and
the first electrode contacts a side surface and a part of an upper surface of the at least one semiconductor layer.

9. The display device of claim 8 , wherein
the second electrode extends parallel to the first electrode and overlaps the at least one semiconductor layer and the organic functional layer, and
an area where the at least one semiconductor layer, the organic functional layer and the second electrode overlap one another is an emission area.

10. The display device of claim 9 , further comprising:
an insulating layer that extends parallel to the first electrode, crosses a direction in which the at least one semiconductor layer extends, and overlaps the at least one semiconductor layer.

11. The display device of claim 1 , wherein the at least one semiconductor layer has a shape of a cylinder, a rod, a wire, a polygonal column, or a combination thereof.

12. A display device comprising:
a first bank and a second bank spaced apart from each other and disposed on a substrate;
at least one semiconductor layer disposed between the first bank and the second bank and comprising an inorganic light emitting layer surrounding an outer circumferential surface of the at least one semiconductor layer;
a first electrode disposed on the first bank and electrically connected to a part of the at least one semiconductor layer;
an organic functional layer disposed on the inorganic light emitting layer of the at least one semiconductor layer; and
a second electrode disposed on the organic functional layer.

13. The display device of claim 12 , wherein
the at least one semiconductor layer comprises a semiconductor part surrounded by the inorganic light emitting layer, and
ends of the semiconductor part in a longitudinal direction are aligned with ends of the inorganic light emitting layer in the longitudinal direction, respectively.

14. The display device of claim 13 , wherein the semiconductor part comprises an n-type dopant and is made of a semiconductor having chemical formula:
Al x Ga y In 1-x-y N
wherein 0≤x≤1, 0≤y≤1 and 0≤x+y≤1.

15. The display device of claim 14 , wherein the organic functional layer comprises at least one of a hole transport layer and a hole injection layer between the inorganic light emitting layer and the second electrode.

16. The display device of claim 15 , wherein
the first electrode is a cathode electrode, and
the second electrode is an anode electrode.

17. The display device of claim 13 , wherein the semiconductor part comprises a p-type dopant and is made of a semiconductor having chemical formula:
Al x Ga y In 1-x-y N
wherein 0≤x≤1, 0≤y≤1 and 0≤x+y≤1.

18. The display device of claim 17 , wherein the organic functional layer comprises at least one of an electron transport layer and an electron injection layer between the inorganic light emitting layer and the second electrode.

19. The display device of claim 18 , wherein
the first electrode is an anode electrode, and
the second electrode is a cathode electrode.

20. The display device of claim 13 , wherein
the first electrode overlaps the first bank and extends parallel to the first bank, and
the first electrode contacts an end of the semiconductor part of the at least one semiconductor layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Yoo Je Won
• Kim In Hyuk

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K59/70

  OLEDs integrated with inorganic light-emitting elements, e.g. with inorganic electroluminescent elements · CPC title

• H10K59/80521

  characterised by their shape · CPC title

• H10K2102/00

  Constructional details relating to the organic devices covered by this subclass · CPC title