Organic electroluminescence display device

Patent metadata

Field	Value
Publication number	US-9577213-B2
Application number	US-201615060136-A
Country	US
Kind code	B2
Filing date	Mar 3, 2016
Priority date	Oct 1, 2013
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

An organic electroluminescence display device includes: a lower electrode that is made of a conductive inorganic material and formed in each of pixels arranged in a matrix in a display area; a light-emitting organic layer that is in contact with the lower electrode and made of a plurality of different organic material layers including a light-emitting layer emitting light; an upper electrode that is in contact with the light-emitting organic layer, formed so as to cover the whole of the display area, and made of a conductive inorganic material; and a conductive organic layer that is in contact with the upper electrode, formed so as to cover the whole of the display area, and made of a conductive organic material.

First claim

What is claimed is:

1. An emitting display device comprising:
a substrate;
a plurality of pixels which are on the substrate, each of the plurality of pixels comprising an organic light emitting element including an anode, an organic emitting layer on the anode, and a cathode on the organic emitting layer, the anode connected to the organic emitting layer, the organic emitting layer connected to the cathode, the cathode shared by the plurality of pixels;
a first organic layer on the cathode, the first organic layer covering the each of the plurality of pixels; and
a sealing film on the first organic layer, the sealing film covering the each of the plurality of pixels and including a first silicon nitride layer, a second organic layer on the first silicon nitride layer, and a second silicon nitride layer on the second organic layer and the first silicon nitride layer;
wherein the plurality of pixels is arranged in a display region,
wherein the first organic layer overlaps the display region and surrounds a first periphery of the display region in plan view,
wherein the cathode surrounds a second periphery of the first organic layer in plan view, and
wherein the sealing film surrounds a third periphery of the cathode in plan view.

2. The emitting display device according to claim 1 ,
wherein the first organic layer is contacted with the cathode.

3. The emitting display device according to claim 1 ,
wherein an insulation film covers an edge portion of the anode,
wherein the insulation film is arranged between the edge portion of the anode and the organic emitting layer, and
wherein a first organic layer has a first portion located directly above the organic emitting element and a second portion located directly above the insulation film, and
wherein a first thickness of the first portion is thicker than a second thickness of the second portion.

4. The emitting display device according to claim 1 ,
further comprising a transparent inorganic layer between the first organic layer and the sealing film.

5. The emitting display device according to claim 4 ,
wherein a third thickness of the sealing film is thicker than a fourth thickness of the cathode,
wherein the third thickness of the sealing film is thicker than a fifth thickness of the transparent inorganic layer,
wherein the first thickness of the first organic layer is thicker than the fourth thickness of the cathode, and
wherein the first thickness of the first organic layer is thicker than the fifth thickness of the transparent inorganic layer.

6. The emitting display device according to claim 1 , further comprising a counter substrate on the sealing film,
wherein the emitting display device has a first area and a second area,
the first area is located directly above the display region,
the second area is located outside the third periphery of the the cathode,
the first area has a first distance between the counter substrate and the sealing film,
the second area has a second distance between the counter substrate and the sealing film, and
the first distance is smaller than the second distance.

7. The emitting display device according to claim 6 , further comprising a fill material between the counter substrate and the sealing film.

8. The emitting display device according to claim 1 , wherein the second organic layer is divided to a plurality of regions, and wherein the first organic layer continuously covers the plurality of pixels.

9. An emitting display device comprising:
a substrate having a first edge portion;
a plurality of pixels which are on the substrate, each of the plurality of pixels including a light emitting element and a cathode shared by the plurality of pixels;
a first organic layer on the cathode, the first organic layer covering the each of the plurality of pixels; and
a sealing film on the first organic layer, the sealing film covering the each of the plurality of pixels, the sealing film including a first silicon nitride layer, a second organic layer on the first silicon nitride layer, and a second silicon nitride layer on the second organic layer and the first silicon nitride layer;
wherein the plurality of pixels is arranged in a display region,
wherein a first distance between a third edge portion of the first organic layer and the first edge portion of the substrate is shorter than a second distance between a second edge portion of the display region and the first edge portion of the substrate in plan view,
wherein a third distance between a fourth edge portion of the cathode and the first edge portion of the substrate is shorter than the second distance in plan view, and
wherein a fourth distance between a fifth edge portion of the sealing film and the first edge portion of the substrate is shorter than the third distance in plan view.

10. The emitting display device according to claim 9 ,
wherein the first organic layer is contacted with the cathode.

11. The emitting display device according to claim 9 ,
wherein an insulation film covers an edge portion of the anode,
wherein the insulation film is arranged between the edge portion of the anode and the organic emitting layer, and
wherein a first organic layer has a first portion located directly above the organic emitting element and a second portion located directly above the insulation film, and
wherein a first thickness of the first portion is thicker than a second thickness of the second portion.

12. The emitting display device according to claim 11 ,
wherein a transparent inorganic layer is arranged between the first organic layer and the sealing film.

13. The emitting display device according to claim 12 ,
wherein a third thickness of the sealing film is thicker than a fourth thickness of the cathode,
wherein the third thickness of the sealing film is thicker than a fifth thickness of the transparent inorganic layer,
wherein the first thickness of the first organic layer is thicker than the fourth thickness of the cathode, and
wherein the first thickness of the first organic layer is thicker than the fifth thickness of the transparent inorganic layer.

14. The emitting display device according to claim 9 , further comprising a counter substrate on the sealing film,
wherein the counter substrate and the sealing film has a fifth distance therebetween in the display region,
wherein the counter substrate and the sealing film a sixth distance therebetween outside the periphery of the cathode, and
wherein the fifth distance is smaller than the sixth distance.

15. The emitting display device according to claim 14 , further comprising a fill material between the counter substrate and the sealing film.

16. The emitting display device according to claim 9 , wherein the second organic layer is divided to a plurality of regions, and
wherein the first organic layer continuously covers the plurality of pixels.

17. The emitting display device according to claim 9 , wherein the fifth edge portion of the sealing film is conforms to the first edge portion of the substrate in plan view.

Assignees

• Japan Display Inc

Inventors

• Sato Toshihiro
• Toyoda Hironori

Classifications

• H10K59/122

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

• H10K50/8445

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

• H10K59/8792

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

• H10K59/8731 Primary

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

• H10K59/8722

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title