Display panel including reflection pattern

Patent metadata

Field	Value
Publication number	US-11569305-B2
Application number	US-202016941471-A
Country	US
Kind code	B2
Filing date	Jul 28, 2020
Priority date	Aug 27, 2019
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

A display panel including a light emitting element to emit a source light and including a first electrode, a light emitting layer disposed on the first electrode, and a second electrode disposed on the light emitting layer and outputting a source light, a pixel definition layer including an opening exposing at least a portion of the first electrode, an optical conversion pattern disposed on the pixel definition layer, a reflection pattern disposed on the light emitting element and including an inclined surface, and a first light blocking pattern disposed outside from the optical conversion pattern when viewed in a plan view.

First claim

What is claimed is:

1. A display panel, comprising:
a light emitting element configured to emit a source light and including a first electrode, a light emitting layer disposed on the first electrode, and a second electrode disposed on the light emitting layer;
a pixel definition layer including an opening exposing at least a portion of the first electrode;
an optical conversion pattern disposed on the pixel definition layer;
a reflection pattern disposed on the light emitting element and having an inclined surface; and
a first light blocking pattern, which is disposed outside at least the optical conversion pattern when viewed in a plan view,
wherein a top surface of the optical conversion pattern that faces away from the light emitting element is disposed at a lower elevation than the reflection pattern with respect to the light emitting element.

2. The display panel of claim 1 , wherein the optical conversion pattern is in contact with the pixel definition layer.

3. The display panel of claim 1 , wherein:
the light emitting element further comprises at least one of a hole control layer and an electron control layer overlapping with the light emitting layer; and
a portion of at least one of the hole control layer and the electron control layer is disposed between the pixel definition layer and the optical conversion pattern.

4. The display panel of claim 1 , further comprising a color filter configured to transmit light converted from the source light by the optical conversion pattern.

5. The display panel of claim 4 , wherein:
the color filter is disposed on the reflection pattern; and
the color filter overlaps the reflection pattern and the optical conversion pattern, when viewed in a plan view.

6. The display panel of claim 4 , further comprising a first organic layer disposed on the optical conversion pattern and below the reflection pattern,
wherein at least a portion of the color filter is disposed between the optical conversion pattern and the first organic layer.

7. The display panel of claim 6 , further comprising a second organic layer disposed on the reflection pattern and overlapping the first organic layer.

8. The display panel of claim 1 , wherein the reflection pattern and the first light blocking pattern are spaced apart from each other, when viewed in a plan view.

9. The display panel of claim 1 , wherein the first light blocking pattern comprises a metal layer in contact with an outer side surface of the optical conversion pattern.

10. The display panel of claim 1 , wherein the first light blocking pattern comprises a black coloring agent in contact with an outer side surface of the optical conversion pattern.

11. The display panel of claim 1 , further comprising:
an organic layer disposed on the optical conversion pattern below the reflection pattern; and
a second light blocking pattern disposed on the organic layer and overlapping with the first light blocking pattern when viewed in a plan view.

12. The display panel of claim 11 , further comprising at least one inorganic layer disposed between the organic layer and the light emitting element.

13. The display panel of claim 12 , wherein:
the optical conversion pattern comprises a first pattern disposed at a side of the first electrode, and a second pattern disposed at an opposite side of the first electrode, when viewed in a plan view; and
the inorganic layer is disposed between the first pattern and the second pattern, when viewed in a plan view.

14. The display panel of claim 1 , wherein:
the reflection pattern comprises a lens surface having at least one of a spherical shape, elliptical, lenticular shape, and polygonal pyramid shape; and
the lens surface comprises the inclined surface.

15. The display panel of claim 1 , wherein:
the optical conversion pattern comprises a first pattern and a second pattern disposed at opposite sides of the first electrode when viewed in a plan view;
the inclined surface comprises a first region corresponding to the first pattern and a second region corresponding to the second pattern; and
the first region and the second region are provided as a single body.

16. A display panel, comprising:
a first light emitting element and a second light emitting element configured to emit a source light, respectively, each light emitting element including a first electrode, a light emitting layer disposed on the first electrode, and a second electrode disposed on the light emitting layer;
a pixel definition layer including a first opening and a second opening exposing at least a portion of the first electrode of a corresponding one of the first and second light emitting elements;
a first optical conversion pattern disposed on the pixel definition layer and disposed outside the first electrode of the first light emitting element when viewed in a plan view;
a second optical conversion pattern disposed on the pixel definition layer and disposed outside from the first electrode of the second light emitting element when viewed in a plan view;
a first reflection pattern and a second reflection pattern each including an inclined surface and disposed on the first light emitting element and second light emitting element, respectively; and
an insulating layer overlapping the first optical conversion pattern, the second optical conversion pattern, the first reflection pattern, and the second reflection pattern, and disposed on the first optical conversion pattern and the second optical conversion pattern below the first reflection pattern and the second reflection pattern;
a light blocking pattern disposed between the first optical conversion pattern and the second optical conversion pattern when viewed in a plan view,
wherein the insulating layer covers a top surface of the light blocking pattern that faces away from the first light emitting element.

17. The display panel of claim 16 , wherein:
the first electrode of the first light emitting element and the first electrode of the second light emitting element are spaced apart from each other when viewed in a plan view; and
the second electrode of the first light emitting element and the second electrode of the second light emitting element are provided as a single body.

18. The display panel of claim 16 , wherein the light blocking pattern comprises a metal layer disposed on an outer side surface of the first optical conversion pattern and an outer side surface of the second optical conversion pattern.

19. The display panel of claim 16 , wherein the first optical conversion pattern comprises:
a first pattern and a second pattern disposed at opposite sides of the first electrode in a first direction when viewed in a plan view; and
a third pattern and a fourth pattern disposed at opposite sides of the first electrode in a second direction perpendicular to the first direction when viewed in a plan view.

20. The display panel of claim 19 , wherein the inclined surface comprises first, second, third, and fourth regions corresponding to the first, second, third, and fourth patterns, respectively.

21. The display panel of claim 16 , further comprising:
a first color filter configured to transmit a first light converted from the source light by the first optical conversion pattern; and
a second color filter configured to transmit a second light converted from the source light by the second optical conversion pattern.

22. The display panel of claim 21 , wherein each of a portion of the first color filt

Assignees

• Samsung Display Co Ltd

Inventors

• Bae Kwang Soo
• Park Beomsoo
• Kwak Eun-Ae
• Oh Minjeong
• Cho Young Je

Classifications

• H01L27/322 Primary

  Electricity · mapped topic

• H01L51/5275

  Electricity · mapped topic

• H10K59/87

  Passivation; Containers; Encapsulations · CPC title

• H10K59/38 Primary

  comprising colour filters or colour changing media [CCM] · CPC title

• H10K59/878 Primary

  comprising reflective means · CPC title