Display device

Patent metadata

Field	Value
Publication number	US-2024423070-A1
Application number	US-202418658107-A
Country	US
Kind code	A1
Filing date	May 8, 2024
Priority date	Jun 16, 2023
Publication date	Dec 19, 2024
Grant date	—

Abstract

A display device includes a first display substrate including a first base layer including a display area and a non-display area adjacent to the display area, and a second display substrate including a second base layer including pixel areas overlapping the display area in a plan view and a peripheral area surrounding the pixel areas. The first display substrate further includes light emitting elements respectively overlapping the pixel areas in a plan view, an encapsulation layer including a first inorganic layer covering the light emitting elements, an organic layer disposed on the first inorganic layer, and a second inorganic layer disposed on the organic layer, a bank disposed on the encapsulation layer and including openings respectively overlapping the pixel areas in a plan view, and light control patterns respectively disposed in the openings. The second inorganic layer has a first refractive index in a range of about 1.3 and to about 1.46.

First claim

What is claimed is:

1 . A display device comprising:
a first display substrate comprising a first base layer comprising a display area and a non-display area adjacent to the display area; and a second display substrate comprising a second base layer comprising pixel areas overlapping the display area in a plan view and a peripheral area surrounding the pixel areas, wherein the first display substrate further comprises:
light emitting elements respectively overlapping the pixel areas in a plan view;
an encapsulation layer comprising a first inorganic layer covering the light emitting elements, an organic layer disposed on the first inorganic layer, and a second inorganic layer disposed on the organic layer;
a bank disposed on the encapsulation layer and including openings respectively overlapping the pixel areas in a plan view; and
light control patterns respectively disposed in the openings, and
the second inorganic layer has a first refractive index in a range of about 1.3 to about 1.46.

2 . The display device of claim 1 , wherein the organic layer has a second refractive index greater than the first refractive index.

3 . The display device of claim 2 , wherein the second refractive index is in a range of about 1.5 to about 1.7.

4 . The display device of claim 1 , wherein a thickness of the second inorganic layer is in a range of about 400 nm to about 2000 nm.

5 . The display device of claim 1 , wherein
the second inorganic layer further comprises a plurality of layers, one of the plurality of layers has the first refractive index, and others of the plurality of layers have a refractive index different from the first refractive index.

6 . The display device of claim 5 , wherein the others of the plurality of layers have a refractive index greater than the first refractive index.

7 . The display device of claim 1 , wherein the light emitting elements emit a blue light.

8 . The display device of claim 1 , wherein one of the light control patterns comprises an organic material comprising a metal oxide.

9 . The display device of claim 8 , wherein another one of the light control patterns comprises a quantum dot.

10 . The display device of claim 1 , wherein the second display substrate is disposed above the first display substrate.

11 . The display device of claim 10 , further comprising:
a filling member filled between the first display substrate and the second display substrate.

12 . The display device of claim 10 , further comprising:
a sealing member overlapping the non-display area in a plan view and disposed between the first display substrate and the second display substrate.

13 . The display device of claim 1 , wherein the second display substrate further comprises a low refractive index layer disposed under the second base layer.

14 . The display device of claim 13 , wherein the second display substrate further comprises a second capping layer disposed under the low refractive index layer and covering the low refractive index layer.

15 . The display device of claim 1 , further comprising:
a first capping layer covering the bank and the light control patterns.

16 . The display device of claim 1 , wherein the second inorganic layer comprises a silicon oxide.

17 . The display device of claim 1 , wherein the second inorganic layer comprises a silicon oxynitride.

18 . The display device of claim 1 , wherein the second display substrate further comprises color filters disposed on the second base layer.

19 . The display device of claim 18 , wherein the color filters comprise a first color filter, a second color filter, and a third color filter.

20 . The display device of claim 19 , wherein two or more of the first, second, and third color filters overlap with each other in a plan view in the peripheral area.

Assignees

• Samsung Display Co Ltd

Inventors

• Kwon Junghyun
• Yoon Seon-Tae
• Cha Soonkyu

Classifications

• H10K2102/351

  Thickness · CPC title

• H10K59/872

  Containers · CPC title

• H10K59/8792

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

• H10K59/122

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

• H10K77/10

  Substrates, e.g. flexible substrates · CPC title