Display device and method of manufacturing display device

Patent metadata

Field	Value
Publication number	US-12238984-B2
Application number	US-202117356937-A
Country	US
Kind code	B2
Filing date	Jun 24, 2021
Priority date	Oct 13, 2020
Publication date	Feb 25, 2025
Grant date	Feb 25, 2025

Abstract

A display device includes a first light emitting element in a first display area, a first pixel circuit in a first non-display area spaced from the first display area and connected to the first light emitting element, an insulating layer covering the first pixel circuit, a metal wiring on the insulating layer, connected to the first pixel circuit, and extending from the first non-display area to a second non-display area between the first display area and the first non-display area, and a transparent wiring on the insulating layer, connecting the first light emitting element and the metal wiring, and extending from the first display area to a surface of the metal wiring, where a trench is defined in a surface of the insulating layer in the second non-display area, and the metal wiring is in the trench in the second non-display area.

First claim

What is claimed is:

1. A display device, comprising:
a substrate including a first display area, a first non-display area spaced apart from the first display area, and a second non-display area disposed between the first display area and the first non-display area;
a first light emitting element disposed on the substrate in the first display area;
a first pixel circuit disposed on the substrate in the first non-display area and electrically connected to the first light emitting element;
a first insulating layer disposed on the substrate, covering the first pixel circuit, and including a first surface facing the substrate;
a metal wiring disposed on the first insulating layer, connected to the first pixel circuit, extending from the first non-display area to the second non-display area, and including a first surface facing the first insulating layer; and
a transparent wiring disposed on the first insulating layer, connecting the first light emitting element and the metal wiring, and extending from the first display area to a second surface of the metal wiring opposite to the first surface of the metal wiring,
wherein a trench is defined in a second surface of the first insulating layer opposite to the first surface of the first insulating layer in the second non-display area, and
wherein the metal wiring is disposed in the trench in the second non-display area.

2. The display device of claim 1 , wherein a depth of the trench is less than a thickness of the first insulating layer along a direction perpendicular to a main plane extension direction of the substrate.

3. The display device of claim 1 , wherein a depth of the trench is equal to a thickness of the first insulating layer along a direction perpendicular to a main plane extension direction of the substrate.

4. The display device of claim 1 , wherein a depth of the trench is greater than a thickness of the first insulating layer along a direction perpendicular to a main plane extension direction of the substrate.

5. The display device of claim 1 , wherein a depth of the trench is less than a thickness of the metal wiring along a direction perpendicular to a main plane extension direction of the substrate.

6. The display device of claim 1 , wherein a depth of the trench is equal to a thickness of the metal wiring along a direction perpendicular to a main plane extension direction of the substrate.

7. The display device of claim 1 , wherein a thickness of the transparent wiring is less than a thickness of the metal wiring along a direction perpendicular to a main plane extension direction of the substrate.

8. The display device of claim 1 , wherein the first insulating layer includes an inorganic insulating material.

9. The display device of claim 8 , further comprising:
a second insulating layer disposed between the substrate and the first insulating layer.

10. The display device of claim 9 , wherein the trench is recessed from the second surface of the first insulating layer to at least a portion of the second insulating layer.

11. The display device of claim 9 , wherein the second insulating layer includes an inorganic insulating material.

12. The display device of claim 1 , wherein the first insulating layer includes an organic insulating material.

13. The display device of claim 1 , wherein the first light emitting element includes a pixel electrode, an emission layer disposed on the pixel electrode, and an opposite electrode disposed on the emission layer, and
wherein the transparent wiring is connected to the pixel electrode.

14. The display device of claim 1 , wherein the transparent wiring includes at least one of indium tin oxide, indium zinc oxide, indium gallium oxide, tin oxide, and zinc oxide.

15. The display device of claim 1 , wherein the substrate further includes a second display area surrounding at least a portion of the first display area, and
wherein the display device further includes:
a second light emitting element disposed on the substrate in the second display area; and
a second pixel circuit overlapping the second light emitting element and electrically connected to the second light emitting element.

16. The display device of claim 15 , wherein a transmittance of the first display area is greater than a transmittance of the second display area.

17. A method of manufacturing a display device, the method comprising:
forming a first pixel circuit on a substrate in a first non-display area spaced apart from a first display area;
forming a first insulating layer covering the first pixel circuit on the substrate and including a first surface facing the substrate;
defining a trench in a second surface of the first insulating layer opposite to the first surface of the first insulating layer in a second non-display area disposed between the first display area and the first non-display area;
forming a metal wiring connected to the first pixel circuit, extending from the first non-display area into the trench in the second non-display area on the first insulating layer, and including a first surface facing the first insulating layer;
forming a transparent wiring extending from the first display area to a second surface of the metal wiring opposite to the first surface of the metal wiring on the first insulating layer; and
forming a first light emitting element connected to the transparent wiring on the first insulating layer in the first display area.

18. The method of claim 17 , wherein the trench is defined using a halftone mask or a slit mask.

19. The method of claim 17 , wherein the first insulating layer includes an inorganic insulating material.

20. The method of claim 17 , wherein the first insulating layer includes an organic insulating material.

Assignees

• Samsung Display Co Ltd

Inventors

• Park Gwui-Hyun
• Sugitani Koichi
• Kim Hye In
• PARK Chulwon
• Hong Pil Soon

Classifications

• H10K59/1201

  Manufacture or treatment · CPC title

• H10D86/441

  Interconnections, e.g. scanning lines · CPC title

• H10D86/021

  of multiple TFTs · CPC title

• H10D86/451

  characterised by the compositions or shapes of the interlayer dielectrics · CPC title

• H10K59/124

  Insulating layers formed between TFT elements and OLED elements · CPC title