Display apparatus and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-2022013749-A1
Application number	US-202117337870-A
Country	US
Kind code	A1
Filing date	Jun 3, 2021
Priority date	Jul 10, 2020
Publication date	Jan 13, 2022
Grant date	—

Abstract

A display apparatus includes a substrate including a display area including a transmission area and a pixel area, and a peripheral area adjacent to the display area; a display element disposed corresponding to the pixel area, the display element including a pixel electrode, an intermediate layer on the pixel electrode, and an opposite electrode on the intermediate layer; a hydrophobic layer disposed corresponding to the transmission area; and a plurality of fine particles disposed on the hydrophobic layer, the plurality of fine particles and the opposite electrode including a same material.

First claim

What is claimed is:

1 . A display apparatus comprising:
a substrate including:
a display area including a transmission area and a pixel area; and
a peripheral area adjacent to the display area;
a display element disposed corresponding to the pixel area, the display element comprising:
a pixel electrode;
an intermediate layer on the pixel electrode; and
an opposite electrode on the intermediate layer;
a hydrophobic layer disposed corresponding to the transmission area; and a plurality of fine particles disposed on the hydrophobic layer, the plurality of fine particles and the opposite electrode comprising a same material.

2 . The display apparatus of claim 1 , wherein the hydrophobic layer comprises a fluorine-based molecule including at least one —CF 3 group at an end.

3 . The display apparatus of claim 1 , wherein
the intermediate layer comprises:
an emission layer on the pixel electrode; and
an electron transport layer and an electron injection layer, the electron transport layer and the electron injection layer being disposed between the emission layer and the opposite electrode, and
the hydrophobic layer is disposed directly on the electron transport layer.

4 . The display apparatus of claim 3 , wherein the electron injection layer comprises a metal material.

5 . The display apparatus of claim 1 , wherein
the intermediate layer comprises:
an emission layer on the pixel electrode; and
an electron transport layer and an electron injection layer, the electron transport layer and the electron injection layer being disposed between the emission layer and the opposite electrode, and
the hydrophobic layer is disposed directly on the electron transport layer.

6 . The display apparatus of claim 1 , wherein each of the plurality of fine particles has a diameter in a range of about 1 nm to about 10 nm.

7 . The display apparatus of claim 1 , wherein, in a same area, a volume ratio of the plurality of fine particles is about 30% or less of a volume ratio of the opposite electrode.

8 . The display apparatus of claim 1 , further comprising a capping layer disposed on the opposite electrode corresponding to the display area.

9 . The display apparatus of claim 8 , wherein the capping layer includes an opening corresponding to the transmission area.

10 . The display apparatus of claim 9 , further comprising a thin-film encapsulation layer disposed on the capping layer, the thin-film encapsulation layer comprising at least one inorganic encapsulation layer and at least one organic encapsulation layer,
wherein the at least one inorganic encapsulation layer directly contacts the plurality of fine particles and corresponds to the transmission area.

11 . The display apparatus of claim 8 , wherein the capping layer has a refractive index in a range of about 1.7 to about 1.99.

12 . The display apparatus of claim 8 , further comprising an optical functional layer disposed above the hydrophobic layer corresponding to the transmission area, wherein the optical functional layer has a refractive index in a range of about 1.3 to about 1.6.

13 . The display apparatus of claim 12 , wherein the optical functional layer directly contacts the plurality of fine particles.

14 . The display apparatus of claim 12 , wherein the capping layer is disposed on the optical functional layer corresponding to the transmission area.

15 . The display apparatus of claim 1 , wherein the opposite electrode includes an opening corresponding to the transmission area.

16 . The display apparatus of claim 1 , wherein the plurality of fine particles have hydrophilicity.

17 . A method of manufacturing a display apparatus, the method comprising:
preparing a substrate including a display area and a peripheral area adjacent to the display area, the display area comprising a transmission area and a pixel area; forming a pixel electrode corresponding to the pixel area; forming an intermediate layer on the pixel electrode corresponding to the pixel area and the transmission area; forming a hydrophobic layer corresponding to the transmission area; and applying an electrode material onto the intermediate layer and the hydrophobic layer in the pixel area and the transmission area.

18 . The method of claim 17 , wherein the applying of the electrode material comprises:
forming an opposite electrode on the intermediate layer corresponding to the pixel area; and forming a plurality of fine particles on the hydrophobic layer corresponding to the transmission area.

19 . The method of claim 18 , wherein the forming of the opposite electrode and the forming of the plurality of fine particles are performed simultaneously.

20 . The method of claim 18 , wherein
the electrode material has hydrophilicity, and the forming of the opposite electrode includes forming the opposite electrode only in the pixel area by the hydrophobic layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Jaeik
• Gwark Hyejin
• Park Jungsun
• Park Heemin
• Shim Yongsub
• Lee Yeonhwa
• Lee Joongu
• Hong Jongbeom

Classifications

• H10K59/122 Primary

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K59/00

  Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00 · CPC title

• H10K50/844

  Encapsulations · CPC title

• H10K30/865

  Intermediate layers comprising a mixture of materials of the adjoining active layers · CPC title

• H10K50/85 Primary

  Arrangements for extracting light from the devices · CPC title