Display device

Patent metadata

Field	Value
Publication number	US-2025072193-A1
Application number	US-202418810151-A
Country	US
Kind code	A1
Filing date	Aug 20, 2024
Priority date	Aug 25, 2023
Publication date	Feb 27, 2025
Grant date	—

Abstract

A display device includes a substrate, a pixel electrode provided on the substrate, a light emitting element provided on the pixel electrode, and including a first semiconductor layer, a second semiconductor layer, and an active layer interposed between the first semiconductor layer and the second semiconductor layer, a connection electrode provided between the pixel electrode and the light emitting element, an adhesive layer provided between the connection electrode and the pixel electrode, and a common electrode provided on the light emitting element. The first semiconductor layer includes a body portion adjacent to the active layer, and a support portion protruding from the body portion toward the pixel electrode, and the adhesive layer overlaps the support portion of the first semiconductor layer in a horizontal direction of the substrate.

First claim

What is claimed is:

1 . A display device comprising:
a substrate; a pixel electrode on the substrate; a light emitting element on the pixel electrode, the light emitting element comprising a first semiconductor layer, a second semiconductor layer, and an active layer between the first semiconductor layer and the second semiconductor layer; a connection electrode between the pixel electrode and the light emitting element; an adhesive layer between the connection electrode and the pixel electrode; and a common electrode on the light emitting element, wherein the first semiconductor layer comprises a body portion adjacent to the active layer, and a support portion protruding from the body portion toward the pixel electrode, and the adhesive layer overlaps the support portion of the first semiconductor layer in a horizontal direction of the substrate.

2 . The display device of claim 1 , wherein the support portion of the first semiconductor layer is at a position adjacent to an edge of the body portion.

3 . The display device of claim 1 , wherein a thickness of the support portion of the first semiconductor layer is equal to or greater than a thickness of the connection electrode.

4 . The display device of claim 1 , wherein the support portion of the first semiconductor layer is in contact with the pixel electrode.

5 . The display device of claim 1 , wherein the body portion and the support portion of the first semiconductor layer are integral with each other.

6 . The display device of claim 1 , wherein the connection electrode is surrounded by the support portion.

7 . The display device of claim 1 , wherein the support portion of the first semiconductor layer comprises a first pillar, and a second pillar facing the first pillar, and
the adhesive layer and the connection electrode are between the first pillar and the second pillar of the support portion.

8 . The display device of claim 7 , wherein the first pillar and the second pillar are spaced apart from each other in a plan view.

9 . The display device of claim 8 , wherein a width of the adhesive layer is greater than a distance between the first pillar and the second pillar.

10 . The display device of claim 6 , wherein a space between the body portion of the first semiconductor layer and the adhesive layer is empty.

11 . The display device of claim 7 , wherein a space between the body portion of the first semiconductor layer and the adhesive layer is empty or comprises a via layer.

12 . The display device of claim 1 , wherein a cross section of the support portion of the first semiconductor layer is square, pentagonal, or hexagonal.

13 . The display device of claim 1 , wherein the adhesive layer comprises solder.

14 . The display device of claim 1 , wherein the pixel electrode comprises glass.

15 . A display device comprising:
a substrate; a first pixel electrode on the substrate and comprising a groove; an adhesive layer on the groove of the first pixel electrode; a connection electrode on the adhesive layer; a first light emitting element on the connection electrode, and comprising a first semiconductor layer, a second semiconductor layer, and an active layer between the first semiconductor layer and the second semiconductor layer; a common electrode on the first light emitting element; and a first wavelength conversion layer on the common electrode, the first wavelength conversion layer overlapping the first light emitting element, wherein the connection electrode, the first light emitting element, and the first wavelength conversion layer overlap the groove of the first pixel electrode.

16 . The display device of claim 15 , wherein a width of the adhesive layer is equal to or greater than a width of the groove of the first pixel electrode.

17 . The display device of claim 15 , further comprising:
a bank layer on the first pixel electrode, the bank layer not overlapping the groove of the first pixel electrode; and a light blocking layer on the common electrode, the light blocking layer overlapping the bank layer.

18 . The display device of claim 15 , further comprising:
a second pixel electrode on the substrate and spaced apart from the first pixel electrode; a second light emitting element on the connection electrode, and comprising a first semiconductor layer, a second semiconductor layer, and an active layer between the first semiconductor layer and the second semiconductor layer; and a light transmission layer on the common electrode, the light transmission layer overlapping the second light emitting element.

19 . The display device of claim 15 , wherein the first semiconductor layer of the first light emitting element comprises a body portion adjacent to the active layer, and a support portion protruding from the body portion toward the first pixel electrode, and
the support portion is in contact with the first pixel electrode.

20 . The display device of claim 19 , wherein the support portion of the first semiconductor layer comprises a first pillar, and a second pillar facing the first pillar, and
a width of the groove of the first pixel electrode is equal to or smaller than a distance between the first pillar and the second pillar.

Assignees

• Samsung Display Co Ltd

Inventors

• Eom Ki Chang
• Kim Sung Hwan

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10H20/831

  characterised by their shape · CPC title

• H10H20/833

  Transparent materials · CPC title

• H10H20/819

  characterised by their shape, e.g. curved or truncated substrates · CPC title

• H10H20/8512

  Wavelength conversion materials · CPC title