Display panel and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-11469287-B2
Application number	US-202016846246-A
Country	US
Kind code	B2
Filing date	Apr 10, 2020
Priority date	Jun 7, 2019
Publication date	Oct 11, 2022
Grant date	Oct 11, 2022

Abstract

The display panel includes an upper display substrate including a plurality of pixel areas and a light blocking area, a lower display substrate. The upper display substrate includes a base substrate, a barrier part overlapping the light blocking area and disposed on the base substrate, a light blocking layer including a first light blocking portion disposed on the barrier part and a second light blocking portion disposed on the same layer as the barrier part to respectively overlap the pixel areas, a reflection layer including a first reflection portion disposed on the first light blocking portion and a second reflection portion disposed on the second light blocking portion, and a light control layer overlapping the pixel areas and disposed on the reflection layer. A plurality of openings passing through the second light blocking portion and the second reflection portion are defined in each of the pixel areas.

First claim

What is claimed is:

1. A display panel comprising:
an upper display substrate on which a plurality of pixel areas and a light blocking area adjacent to the pixel areas are defined; and
a lower display substrate facing the upper display substrate and comprising a plurality of display elements respectively overlapping the pixel areas,
wherein the upper display substrate comprises:
a base substrate defining the pixel areas and the light blocking area;
a barrier part overlapping the light blocking area and disposed on the base substrate;
a light blocking layer comprising a first light blocking portion disposed on the barrier part and a second light blocking portion disposed on a same layer as the barrier part is disposed on to respectively overlap the pixel areas;
a reflection layer comprising a first reflection portion disposed on the first light blocking portion and a second reflection portion disposed on the second light blocking portion; and
a light control layer overlapping the pixel areas and disposed on the reflection layer,
wherein a plurality of openings passing through the second light blocking portion and the second reflection portion are defined in each of the pixel areas, and
the openings overlap the pixel areas, respectively.

2. The display panel of claim 1 , wherein each of the openings is surrounded by the second light blocking portion in a top plan view.

3. The display panel of claim 2 , wherein the second light blocking portion overlapping a first pixel area of the pixel areas comprises a first light blocking area and a second light blocking area, which are spaced apart from each other in a first direction with respect to a first opening, which overlaps the first pixel area, of the openings, and
a width of the first light blocking area, a width of the first opening, and a width of the second light blocking area in the first direction are substantially equal.

4. The display panel of claim 3 , wherein the second light blocking portion further comprises a third light blocking area and a fourth light blocking area, which are spaced apart from each other in a second direction perpendicular to the first direction with respect to the first opening, and
a width of the third light blocking area, the width of the first opening, and a width of the fourth light blocking area in the second direction are substantially equal.

5. The display panel of claim 2 , wherein the second light blocking portion overlapping a first pixel area of the pixel areas has a surface area greater than a surface area of the opening, which overlaps the first pixel area, in the top plan view.

6. The display panel of claim 1 , wherein the first light blocking portion is disposed between the barrier part and the first reflection portion, and
the second light blocking portion is disposed between the base substrate and the second reflection portion.

7. The display panel of claim 6 , wherein the barrier part comprises a top surface facing the base substrate, a bottom surface facing the lower display substrate, and a side surface connecting the top surface to the bottom surface, and
the first light blocking portion exposes at least a portion of the bottom surface of the barrier part.

8. The display panel of claim 7 , wherein a bottom surface opening passing through the first light blocking portion and the first reflection portion and exposing the bottom surface of the barrier part is defined.

9. The display panel of claim 6 , wherein the reflection layer entirely overlaps the light blocking layer.

10. The display panel of claim 1 , further comprising:
a color filter layer disposed between the base substrate and the light control layer; and
an upper insulation layer covering the color filter layer and disposed on the base substrate,
wherein each of the openings exposes the upper insulation layer.

11. The display panel of claim 10 , wherein the display elements emit first color light to the upper display substrate,
the pixel areas comprise first, second, and third pixel areas that are arranged in one direction, and
the light control layer comprises:
a first conversion part overlapping the first pixel area and configured to convert the first color light so as to emit second color light;
a second conversion part overlapping the second pixel area and configured to convert the first color light so as to emit third color light different from the second color light; and
a transmission part overlapping the third pixel area and configured to transmit the first color light.

12. The display panel of claim 11 , wherein the color filter layer comprises:
a first color filter overlapping the first pixel area and configured to transmit the second color light different from the first color light;
a second color filter overlapping the second pixel area and configured to transmit the third color light different from the second color light; and
a third color filter overlapping the third pixel area and configured to transmit the first color light,
wherein the third color filter comprises a filter portion overlapping the third pixel area and a light blocking portion overlapping the light blocking area.

13. The display panel of claim 1 , wherein the lower display substrate further comprises a pixel defining layer in which light emitting openings respectively overlapping the pixel areas are defined,
each of the display elements comprises a first electrode, a light emitting layer disposed on the first electrode, and a second electrode disposed on the light emitting layer, the first electrode is exposed by a corresponding light emitting opening of the light emitting openings, and
a height of the barrier part is greater than the shortest distance from a bottom surface of the barrier part to a top surface of the first electrode in a thickness direction perpendicular to the base substrate.

14. The display panel of claim 13 , wherein a ratio of the height of the barrier part to the shortest distance is 2:1 in the thickness direction.

15. The display panel of claim 1 , wherein the first light blocking portion and the second light blocking portion are provided in an integrated shape, and
the first reflection portion and the second reflection portion are provided in an integrated shape.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Chang-Hun
• Kim Min-Jae
• Kim Min-Hee
• Kim Taehoon
• Park Kyunghae
• Park Joon-Hyung
• Yang Danbi
• Yu Hanjun
• Youn Dokyung

Classifications

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K59/38 Primary

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

• H10K59/875 Primary

  Arrangements for extracting light from the devices · CPC title

• H01L2227/323

  Electricity · mapped topic

• H01L27/322

  Electricity · mapped topic