Display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-12225774-B2
Application number	US-202117353815-A
Country	US
Kind code	B2
Filing date	Jun 22, 2021
Priority date	Dec 4, 2020
Publication date	Feb 11, 2025
Grant date	Feb 11, 2025

Abstract

A display device includes a substrate, a first electrode disposed on the substrate, a first pixel-defining layer disposed on the first electrode, the first pixel-defining layer having a first opening exposing at least a portion of the first electrode and including a pigment, and a second pixel-defining layer disposed on the first pixel-defining layer and including a dye.

First claim

What is claimed is:

1. A display device comprising:
a substrate;
a first electrode disposed on the substrate;
a first pixel-defining layer disposed on the first electrode, the first pixel-defining layer having a first opening exposing at least a portion of the first electrode and comprising a negative photosensitive material and a black pigment; and
a second pixel-defining layer disposed on the first pixel-defining layer and comprising a positive photosensitive material and a black dye, wherein the first pixel-defining layer has an optical density of 1 or more, and
an optical density of the second pixel-defining layer is less than an optical density of the first pixel-defining layer.

2. The display device of claim 1 , wherein:
the first pixel-defining layer comprises a plurality of particles, and
an average size of the plurality of particles is about 200 nm or less.

3. The display device of claim 1 , wherein the second pixel-defining layer has a second opening exposing at least a portion of the first electrode.

4. The display device of claim 3 , wherein a width of the first opening is greater than a width of the second opening.

5. The display device of claim 4 , wherein the second pixel-defining layer covers an upper surface and a side surface of the first pixel-defining layer.

6. The display device of claim 4 , wherein the second pixel-defining layer is in direct contact with the first electrode.

7. The display device of claim 1 , further comprising a spacer disposed on the second pixel-defining layer,
wherein the spacer comprises a same material as the second pixel-defining layer.

8. The display device of claim 7 , wherein the first pixel-defining layer and the spacer are formed of different materials from each other.

9. The display device of claim 3 , further comprising:
an intermediate layer comprising an emission layer filling the second opening; and
a second electrode disposed on the intermediate layer.

10. The display device of claim 9 , further comprising a thin-film encapsulation layer disposed on the second electrode, the thin-film encapsulation layer comprising at least one inorganic layer and at least one organic layer.

11. The display device of claim 10 , further comprising an optical functional layer disposed on the thin-film encapsulation layer, the optical functional layer comprising a color filter at least partially overlapping the first opening and a black matrix surrounding the color filter.

12. The display device of claim 11 , wherein the black matrix at least partially overlaps the first pixel-defining layer.

13. The display device of claim 11 , wherein the black matrix at least partially overlaps the second pixel-defining layer.

14. A display device comprising:
a plurality of pixels, each pixel comprising a pixel electrode; and
a pixel-defining layer disposed between the plurality of pixels to define the plurality of pixels,
wherein the pixel-defining layer comprises:
a first pixel-defining layer disposed to at least partially cover the pixel electrode and comprising a negative photosensitive material and a black pigment; and
a second pixel-defining layer disposed on the first pixel-defining layer to at least partially cover the pixel electrode and comprising a positive photosensitive material and a black dye,
the first pixel-defining layer has an optical density of 1 or more, and
an optical density of the second pixel-defining layer is less than an optical density of the first pixel-defining layer.

15. The display device of claim 14 , wherein a light transmittance of the first pixel-defining layer is substantially equal to or less than a light transmittance of the second pixel-defining layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Hong Pilsoon
• Kim Jungi
• Sim Junho
• Lee Jaehun
• Jung Yangho

Classifications

• H10K50/844

  Encapsulations · CPC title

• H10K50/865

  comprising light absorbing layers, e.g. light-blocking layers · CPC title

• H10K71/00

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

• H10K59/8792

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

• H10K59/8731

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title