Display device

Patent metadata

Field	Value
Publication number	US-2020152705-A1
Application number	US-201916595307-A
Country	US
Kind code	A1
Filing date	Oct 7, 2019
Priority date	Nov 13, 2018
Publication date	May 14, 2020
Grant date	—

Abstract

A display device includes a first substrate; light-emitting elements disposed on the first substrate; an encapsulation film covering the light-emitting elements; a second substrate facing the first substrate; a first outermost film disposed on the second substrate to face the encapsulation film and including AO X N Y (where A is a metal or non-metal element and X>Y); and a filler material disposed between the encapsulation film and the first outermost film and placed in direct contact with the first outermost film.

First claim

What is claimed is:

1 . A display device comprising:
a first substrate; a plurality of light-emitting elements on the first substrate; an encapsulation film covering the plurality of light-emitting elements; a second substrate facing the first substrate; a first outermost film on the second substrate, facing the encapsulation film, and comprising AO X N Y , wherein A is a metal or non-metal element and X>Y; and a filler material between the encapsulation film and the first outermost film, and in direct contact with the first outermost film.

2 . The display device of claim 1 , wherein a first surface tension of the first outermost film is greater than a second surface tension of the filler material.

3 . The display device of claim 2 , wherein the first surface tension of the first outermost film is 60 mN/m or greater.

4 . The display device of claim 3 , wherein a polar component of the first surface tension is 35 mN/n or greater.

5 . The display device of claim 1 , wherein a difference in refractive index between the first outermost film and the filler material is less than or equal to about 0.2.

6 . The display device of claim 1 , wherein the first outermost film has a thickness of about 200 Å to about 1000 Å and a transmittance of about 80% or higher.

7 . The display device of claim 1 , wherein the metal or non-metal element A comprises silicon (Si) or aluminum (Al).

8 . The display device of claim 1 , wherein the filler material comprises one selected from a silicon-based organic material, an epoxy-based organic material, and an acrylic organic material.

9 . The display device of claim 1 , further comprising:
a sealant between the first and second substrates and surrounding the filler material as viewed in a plan view, wherein the filler material is in a space surrounded by the encapsulation film, the first outermost film, and the sealant.

10 . The display device of claim 9 , wherein the sealant is in contact with the filler material and is in direct contact with surfaces of the first and second substrates to couple the surfaces of the first and second substrates together.

11 . The display device of claim 1 , wherein each of the plurality of light-emitting elements comprises an anode electrode, a cathode electrode facing the anode electrode, and an organic layer between the anode and cathode electrodes, and configured to emit blue light.

12 . The display device of claim 1 , further comprising:
a plurality of light conversion patterns between the second substrate and the first outermost film.

13 . The display device of claim 12 , wherein
the plurality of light-emitting elements are each configured to emit blue light, and the plurality of light conversion patterns comprise a first wavelength conversion pattern configured to convert the blue light into red light, a second wavelength conversion pattern configured to convert the blue light into green light, and a light-transmitting pattern configured to transmit the blue light therethrough.

14 . The display device of claim 12 , wherein
the first outermost film forms convex parts in regions where the plurality of light conversion patterns are disposed and concave parts in regions where the plurality of light conversion patterns are not disposed.

15 . The display device of claim 14 , wherein the filler material fills the concave parts of the first outermost film.

16 . The display device of claim 14 , further comprising:
a light shield, wherein the light shield is disposed to overlap with the concave parts of the first outermost film in a thickness direction.

17 . The display device of claim 1 , further comprising:
a second outermost film on the second substrate, in direct contact with the filler material, and comprising BO P N Q , wherein B is a metal or non-metal element and P>Q, wherein the metal or non-metal element B comprises silicon or aluminum.

18 . The display device of claim 17 , wherein
a third surface tension of the second outermost film is greater than a second surface tension of the filler material, the third surface tension is about 60 mN/m or greater, and a polar component of the third surface tension is about 35 mN/m or greater.

19 . A display device comprising:
a first substrate; a plurality of light-emitting elements on the first substrate; an encapsulation film covering the plurality of light-emitting elements; an outermost film on the encapsulation film and comprising AO X N Y , wherein A is a metal or non-metal element and X>Y; a second substrate facing the first substrate; and a filler material between the outermost film and the second substrate and in direct contact with the outermost film.

20 . The display device of claim 19 , wherein a first surface tension of the outermost film is greater than a second surface tension of the filler material, and the first surface tension is about 60 mN/m or greater.

21 . The display device of claim 20 , wherein a polar component of the first surface tension is about 35 mN/n or greater.

22 . The display device of claim 19 , wherein a difference in refractive index between the outermost film and the filler material is less than or equal to about 0.2.

23 . The display device of claim 19 , wherein the outermost film has a thickness of about 200 Å to about 1000 Å and a transmittance of about 80% or higher.

24 . The display device of claim 19 , wherein the metal or non-metal element A comprises silicon or aluminum.

Assignees

• Samsung Display Co Ltd

Inventors

• Son Jung Hyun
• Kim Yo Han
• Kim Yong Tack
• Lee Byoung Duk
• Cho Yoon Hyeung

Classifications

• H01L33/50

  Electricity · mapped topic

• H01L51/5253

  Electricity · mapped topic

• H01L51/5275

  Electricity · mapped topic

• H01L27/3211

  Electricity · mapped topic

• H01L27/322 Primary

  Electricity · mapped topic