Display panel and method for fabricating the same

Patent metadata

Field	Value
Publication number	US-11016331-B2
Application number	US-201916539857-A
Country	US
Kind code	B2
Filing date	Aug 13, 2019
Priority date	Oct 4, 2018
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

A display panel includes an upper display substrate and a lower display substrate. The upper display substrate includes a base substrate, a first partition wall on the base substrate, overlapping the light blocking area, and configured to define first, second, and third internal regions corresponding to the first, second, and third pixel areas, a second partition wall extending from the first partition wall, overlapping at least one area of the first, second, and third pixel areas, and configured to partition a region corresponding to the at least one area into partial regions, and first, second, and third color control layers respectively located in the first, second, and third internal regions.

First claim

What is claimed is:

1. A display panel comprising:
an upper display substrate comprising first, second, and third pixel areas configured to emit light of different colors, and a light blocking area around the first, second, and third pixel areas; and
a lower display substrate comprising first, second, and third display elements corresponding to the first, second, and third pixel areas,
wherein the upper display substrate comprises:
a base substrate;
a first partition wall on the base substrate, overlapping the light blocking area, and configured to define first, second, and third internal regions corresponding to the first, second, and third pixel areas;
first, second, and third color control layers respectively located in the first, second, and third internal regions; and
a second partition wall overlapping at least one pixel area of the first, second, and third pixel areas, and configured to partition at least one internal region of the first, second, and third internal regions into partial regions such that lower surfaces of at least one color control layer of the first, second, and third color control layers located in the partial regions are spaced apart from each other with the second partition wall therebetween.

2. The display panel of claim 1 , wherein each of the first, second, and third display elements comprises a first electrode, a second electrode, and a light emitting layer between the first electrode and the second electrode, and
the light emitting layers of the first, second, and third display elements have an integrated shape to generate blue light.

3. The display panel of claim 2 , wherein the first color control layer comprises a first quantum dot to convert the blue light into red light,
the second color control layer comprises a second quantum dot to convert the blue light into green light, and
the third color control layer is configured to transmit the blue light.

4. The display panel of claim 3 , wherein the upper display substrate further comprises:
a black matrix on the base substrate to overlap the light blocking area;
red, green, and blue color filters on the base substrate to respectively correspond to the first, second, and third pixel areas;
a first encapsulation layer covering the red color filter, the green color filter, and the blue color filter; and
a second encapsulation layer covering the first partition wall, the second partition wall, and the first, second, and third color control layers.

5. The display panel of claim 3 , wherein the second partition wall partitions each of the first, second, and third internal regions into the partial regions.

6. The display panel of claim 3 , wherein the first pixel area has a surface area greater than that of each of the second and third pixel areas on a plane.

7. The display panel of claim 3 , wherein the at least one internal region partitioned by the second partition wall is the first internal region that is defined, together with the second and third internal regions, by the first partition wall, and
the second partition wall overlaps the first electrode of the first display element.

8. The display panel of claim 7 , wherein the second partition wall extends in a first direction, and
the second partition wall is arranged such that the first electrode of the first display element is bisected in a second direction perpendicular to the first direction.

9. The display panel of claim 7 , wherein the partial regions have a same surface area on a plane.

10. The display panel of claim 1 , further comprising a liquid crystal layer between the upper display substrate and the lower display substrate.

11. The display panel of claim 1 , wherein the first color control layer comprises a red color filter,
the second color control layer comprises a green color filter, and
the third color control layer comprises a blue color filter.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Chang-Hun
• Kim Min-Jae
• Kim Min-Hee
• Kim Taehoon
• Park Kyunghae
• Park Joon-Hyoung
• Yang Danbi

Classifications

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/873

  Encapsulations · CPC title

• H10K59/871

  Self-supporting sealing arrangements · CPC title

• G02F1/133516 Primary

  Methods for their manufacture, e.g. printing, electro-deposition or photolithography · CPC title

• G02F1/133617 Primary

  Illumination with ultraviolet light; Luminescent elements or materials associated to the cell · CPC title