Organic light emitting display

Patent metadata

Field	Value
Publication number	US-10756139-B2
Application number	US-201615576928-A
Country	US
Kind code	B2
Filing date	May 2, 2016
Priority date	Jun 19, 2015
Publication date	Aug 25, 2020
Grant date	Aug 25, 2020

Abstract

Disclosed is an organic light emitting display device including a substrate, an organic light emitting element formed on the substrate, and an encapsulation layer encapsulating the organic light emitting element, wherein the encapsulation layer has a structure in which at least two inorganic layers and at least one organic layer are alternately stacked one above another, each of the inorganic layers having a thickness of about 40 nm to about 1,000 nm and an index of refraction of about 1.41 to about 2.0, each of the organic layer having a thickness of about 0.2 μm to about 15 μm and an index of refraction of about 1.4 to about 1.65, the organic layer including a composition for encapsulating a display device, the composition for encapsulating a display device including a photocurable monomer and a photopolymerization initiator.

First claim

The invention claimed is:

1. An organic light emitting display device, comprising:
a substrate;
an organic light emitting element formed on the substrate; and
an encapsulation layer encapsulating the organic light emitting element, the encapsulation layer having a structure in which at least two inorganic layers and at least one organic layer are alternately stacked one above another, wherein:
each inorganic layer has layers having a thickness of about 40 nm to about 1,000 nm and an index of refraction of about 1.41 to about 2.0,
each organic layer has a surface roughness of about 0 nm to about 2 nm,
each organic layer has a thickness of about 0.2 μm to about 15 μm and an index of refraction of about 1.4 to about 1.65, and is formed of a composition that includes a photocurable monomer and a photopolymerization initiator, the photocurable monomer including:
about 60 wt % to about 95 wt % of a monomer without an aromatic hydrocarbon; and
about 5 wt % to about 40 wt % of a monomer represented by

wherein, in Formula 1,
A is a hydrocarbon that includes at least two substituted or non-substituted phenyl groups, or a hetero atom-containing hydrocarbon that includes at least two phenyl substituted or non-substituted groups,
Z 1 and Z 2 are each independently a group represented by Formula 2,
a and b are each independently an integer of 0 to 2, and a+b is an integer of 1 to 4;

wherein, in Formula 2,
* is a portion connected to a carbon atom of A in Formula 1,
X is a single bond, O, or S,
Y is a substituted or non-substituted straight chain alkylene group having 1 to 10 carbon atoms, or a substituted or non-substituted alkoxylene group having 1 to 20 carbon atoms,
R 1 is hydrogen or an alkyl group having 1 to 5 carbon atoms, and
c is 0 or 1.

2. The organic light emitting display device according to claim 1 , wherein:
the inorganic layers comprises a first inorganic layer and a second inorganic layer, and the organic layer comprises a first organic layer,
the encapsulation layer comprises the first inorganic layer, the first organic layer, and the second inorganic layer alternately stacked one above another, and
the first inorganic layer and the second inorganic layer at least partially contact each other.

3. The organic light emitting display device according to claim 2 , wherein the encapsulation layer has a structure in which the first inorganic layer and the second inorganic layer are sequentially stacked at an edge thereof.

4. The organic light emitting display device according to claim 2 , wherein the first inorganic layer and the second inorganic layer have the same area.

5. The organic light emitting display device according to claim 2 , wherein the second inorganic layer is formed to surround the first organic layer.

6. The organic light emitting display device according to claim 1 , wherein the inorganic layers has the same area or a gradually increasing area with increasing distance from the organic light emitting element.

7. The organic light emitting display device according to claim 1 , wherein the inorganic layers and the organic layer has a gradually increasing area with increasing distance from the organic light emitting element.

8. The organic light emitting display device according to claim 1 , wherein the inorganic layer comprises at least one of silicon oxide, silicon nitride, silicon oxynitride, ZnSe, ZnO, Sb 2 O 3 , Al 2 O 3 , In 2 O 3 , or SnO 2 .

9. The organic light emitting display device according to claim 1 , wherein the monomer represented by Formula 1 includes at least one of a mono(meth)acrylate compound and a di(meth)acrylate compound.

10. The organic light emitting display device according to claim 9 , wherein the monomer represented by Formula 1 includes the mono(meth)acrylate compound, and the mono(meth)acrylate compound is represented by following Formula 3:

wherein, in Formula 3,
R 2 is hydrogen or a methyl group,
R 3 is a substituted or non-substituted straight chain alkylene group having 1 to 10 carbon atoms, or a substituted or non-substituted alkoxylene group having 1 to 20 carbon atoms, and
R 4 is a hydrocarbon that includes at least two substituted or non-substituted phenyl groups, or a hetero atom-containing hydrocarbon that includes at least two substituted or non-substituted phenyl groups.

11. The organic light emitting display device according to claim 9 , wherein the monomer represented by Formula 1 includes the di(meth)acrylate compound, and the di(meth)acrylate compound is represented by Formula 4:

wherein, in Formula 4,
R 5 and R 9 are each independently hydrogen or a methyl group,
R 6 and R 8 are each independently a substituted or non-substituted straight chain alkylene group having 1 to 10 carbon atoms, or a substituted or non-substituted alkoxylene group having 1 to 20 carbon atoms, and
R 7 is a hydrocarbon that includes at least two substituted or non-substituted phenyl groups, or a hetero atom-containing hydrocarbon that includes at least two substituted or non-substituted phenyl groups.

12. The organic light emitting display device according to claim 1 , wherein the monomer represented by Formula 1 includes 4-(meth)acryloxy-2-hydroxybenzophenone, ethyl-3,3-diphenyl(meth)acrylate, benzoyloxyphenyl(meth)acrylate, bisphenol A di(meth)acrylate, ethoxylated bisphenol A di(meth)acrylate, bisphenol F di(meth)acrylate, ethoxylated bisphenol F di(meth)acrylate, 4-cumylphenoxyethyl(meth)acrylate, ethoxylated bisphenylfluorenedi(meth)acrylate, 2-phenylphenoxyethyl(meth)acrylate, 2,2′-phenylphenoxyethyldi(meth)acrylate, 2-phenylphenoxypropyl(meth)acrylate, 2,2′-phenylphenoxypropyldi(meth)acrylate, 2-phenylphenoxybutyl(meth)acrylate, 2,2′-phenylphenoxybutyldi(meth)acrylate, 2-(3-phenylphenyl)ethyl(meth)acrylate, 2-(4-benzylphenyl)ethyl(meth)acrylate, 2-phenyl-2-(phenylthio)ethyl(meth)acrylate, 2-(triphenylmethyloxy)ethyl(meth)acrylate, 4-(triphenylmethyloxy)butyl(meth)acrylate, 3-(biphenyl-2-yloxy)butyl(meth)acrylate, 2-(biphenyl-2-yloxy)butyl(meth)acrylate, 4-(biphenyl-2-yloxy)propyl(meth)acrylate, 3-(biphenyl-2-yloxy)propyl(meth)acrylate, 2-(biphenyl-2-yloxy)propyl (meth)acrylate, 4-(biphenyl-2-yloxy)ethyl(meth)acrylate, 3-(biphenyl-2-yloxy)ethyl (meth)acrylate, 2-(4-benzylphenyl)ethyl(meth)acrylate, 4,4′-di((meth) acryloyloxymethyl)biphenyl, 2,2′-di(2-(meth)acryloyloxyethoxy)biphenyl, or a mixture thereof.

13. The organic light emitting display device according to claim 1 , wherein A includes a substituted or non-substituted biphenyl group, a substituted or non-substituted triphenylmethyl group, a substituted or non-substituted terphenyl group, a substituted or non-substituted biphenylene group, a substituted or non-substituted terphenylene group, a substituted or non-substituted quarterphenylene group, a substituted or non-substituted 2-phenyl-2-(phenylthio)ethyl group, a substituted or non-substituted 2,2-diphenylpropane group, a substituted or non-substituted diphenylmethane group, a substituted or non-substituted cumylphenyl group, a substituted or non-substituted bisphenol F group, a substituted or non-substituted bisphenol A group, a substituted or

Assignees

• Samsung Sdi Co Ltd

Inventors

• Kim Hye Jin
• Ko Sung Min
• Kim Mi Sun
• Nam Seong Ryong
• Lee Ji Yeon
• Choi Mi Jeong

Classifications

• H10K59/879

  comprising refractive means, e.g. lenses · CPC title

• H10K50/8445

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

• H10K59/8731 Primary

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

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K50/858

  comprising refractive means, e.g. lenses · CPC title