Display device featuring spaced apart insulating layer patterns

Patent metadata

Field	Value
Publication number	US-12199216-B2
Application number	US-202117470383-A
Country	US
Kind code	B2
Filing date	Sep 9, 2021
Priority date	Sep 29, 2020
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

A display device comprises a substrate, a first electrode on the substrate and extending in a first direction, a second electrode on the substrate and extending in the first direction, the second electrode being spaced apart from the first electrode in a second direction, a first insulating layer on the first electrode and the second electrode, light-emitting elements on the first insulating layer, the light-emitting elements being disposed on the first electrode and the second electrode, a second insulating layer disposed on the light-emitting elements, a first contact electrode disposed on the first electrode and electrically contacting the light-emitting elements, and a second contact electrode disposed on the second electrode and electrically contacting the light-emitting elements. The second insulating layer comprises patterns that cover at least part of the light-emitting elements and are spaced apart from one another in the first direction.

First claim

What is claimed is:

1. A display device comprising:
a substrate;
a first electrode on the substrate and extending in a first direction;
a second electrode on the substrate and extending in the first direction, the second electrode being spaced apart from the first electrode in a second direction;
a first insulating layer on the first electrode and the second electrode;
light-emitting elements on the first insulating layer, the light-emitting elements being disposed on the first electrode and the second electrode;
a second insulating layer disposed on the light-emitting elements;
a first contact electrode disposed on the first electrode and electrically contacting the light-emitting elements; and
a second contact electrode disposed on the second electrode and electrically contacting the light-emitting elements, wherein
the second insulating layer comprises patterns that cover at least part of the light-emitting elements and are spaced apart from one another in the first direction, and
a length of each of the patterns measured in the first direction is greater than a distance between the patterns spaced apart from one another in the first direction.

2. The display device of claim 1 , wherein
a length of each of the patterns measured in the second direction is smaller than a length of the light-emitting elements,
the first contact electrode contacts an end of each of the light-emitting elements,
the second contact electrode contacts another end of each of the light-emitting elements,
the end and the another end of each of the light-emitting elements are exposed from the patterns, and
the patterns are not disposed on the end and the another end of each of the light-emitting elements.

3. The display device of claim 1 , further comprising:
first banks disposed between the substrate and the first electrode and between the substrate and the second electrode,
wherein the patterns of the second insulating layer are between the first banks.

4. The display device of claim 3 , wherein a length of each of the patterns measured in the first direction is greater than a distance between a center of the patterns and a center of the first banks.

5. The display device of claim 1 , wherein the light-emitting elements are not disposed between the patterns spaced apart in the first direction.

6. The display device of claim 5 , wherein the first contact electrode and the second contact electrode are disposed directly on the first insulating layer between the patterns spaced apart from one another in the first direction.

7. The display device of claim 1 , wherein
the second insulating layer comprises an organic insulating material, and
each of the patterns has a flat upper surface.

8. The display device of claim 1 , wherein
the second insulating layer comprises an organic insulating material, and
each of the patterns has a curved upper surface.

9. The display device of claim 1 , wherein
each of the first contact electrode and the second contact electrode comprises:
first electrode portions partially disposed over the patterns; and
second electrode portions disposed between the first electrode portions and located between the patterns spaced apart from one another, and

a width of the first electrode portions is greater than a width of the second electrode portions.

10. The display device of claim 9 , wherein
a length of the first electrode portions measured in the first direction is equal to a length of the pattern parts, and
a distance between the first electrode portions in the first direction is equal to a distance between the patterns in the first direction.

11. The display device of claim 1 , further comprising:
structures between the patterns which are spaced apart from one another in the first direction,
wherein the light-emitting elements are disposed between the structures which are spaced apart from one another in the first direction.

12. The display device of claim 11 , wherein a width of the structures measured in the second direction is smaller than a distance between the first electrode and the second electrode.

13. The display device of claim 11 , wherein
each of the structures comprises:
a bottom layer; and
an upper layer disposed to cover the bottom layer, and

the upper layer and the first electrode or the upper layer and the first contact electrode comprise a same material.

14. The display device of claim 1 , wherein
the second insulating layer comprises a base that overlaps the first electrode and the second electrode, and
the base is spaced apart from the light-emitting elements in the second direction.

15. The display device of claim 14 , further comprising:
a third insulating layer disposed on the second insulating layer, wherein
the first contact electrode is disposed on the third insulating layer, and
the second contact electrode is disposed between the second insulating layer and the third insulating layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Jong Won
• Cho Hyun Min

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10H29/142

  Two-dimensional arrangements, e.g. asymmetric LED layout · CPC title

• H10H20/8312 Primary

  extending at least partially through the bodies · CPC title

• H10H20/853

  characterised by their shape · CPC title

• H10H20/857 Primary

  Interconnections, e.g. lead-frames, bond wires or solder balls · CPC title