Organic electroluminescence display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9520577-B2
Application number	US-201514690591-A
Country	US
Kind code	B2
Filing date	Apr 20, 2015
Priority date	Aug 21, 2013
Publication date	Dec 13, 2016
Grant date	Dec 13, 2016

Abstract

A sealing film includes a first inorganic layer that has, in a surface thereof, a convex portion corresponding to an upper surface of an element layer, a second inorganic layer that covers the first inorganic layer, and an organic layer disposed between these layers. The surface of the first inorganic layer includes a recurved area changed from an area around the convex portion to the convex portion, and a flat area surrounding the element layer. The flat area includes an outer peripheral area on an outer end of the first inorganic layer, and an inner peripheral area between the outer peripheral area and the recurved area. The organic layer has an end in the outer peripheral area, has another portion in the recurved area, and avoids the inner peripheral area. A part of the second inorganic layer contacts the first inorganic layer in the inner peripheral area.

First claim

What is claimed is:

1. An organic electroluminescence display device, comprising:
a first substrate;
an element layer provided on the first substrate, wherein the element layer comprises an anode electrode, an organic electroluminescence film, and a cathode electrode;
a first inorganic layer provided over the element layer; and
a second inorganic layer provided over the first inorganic layer, wherein the second inorganic layer at least partially contacts with the first inorganic layer,
wherein an upper surface of the first inorganic layer and a lower surface of the second inorganic layer are separated from each other by a predetermined distance above an edge portion of the first substrate.

2. The organic electroluminescence display device according to claim 1 ,
wherein a first region which includes the element layer is arranged around a second region, where the second inorganic layer is in contact with the first inorganic layer, and the upper surface of the first inorganic layer and the lower surface of the second inorganic layer are separated from each other.

3. The organic electroluminescence display device according to claim 2 ,
wherein the upper surface of the first inorganic layer includes a first flat area and a second flat area,
wherein each of the first and second inorganic layers includes SiN,
wherein the lower surface of the second inorganic layer includes a first curved area and a third flat area,
wherein the third flat area of the lower surface is in contact with the second flat area of the upper surface, and
wherein there is the predetermined distance between the first flat area of the upper surface and the first curved area of the lower surface.

4. The organic electroluminescence display device according to claim 3 ,
further comprising a first organic layer between the first flat area of the upper surface and the first curved area of the lower surface,
wherein the first inorganic layer, the first organic layer, and the second inorganic layer each have a side exposed to outside on the edge portion of the first substrate.

5. The organic electroluminescence display device according to claim 4 ,
further including a circuit layer between the first substrate and the element layer; and
a second organic layer,
wherein the upper surface of the first inorganic layer includes a second curved area ascending from the first substrate and a boundary between the second curved area and the second flat area, the second flat area lying between the boundary and the first flat area,
wherein the second organic layer sits on the boundary,
wherein the edge portion of the first substrate has a side which is flush with an edge of the first flat area and an edge of the first curved area.

6. The organic electroluminescence display device according to claim 5 ,
wherein a seal film, which includes the first and second inorganic layers and the first and second organic layers, seals the element layer; and
wherein the first and second curved areas, the boundary, the first, second and third flat areas are arranged in the second region.

7. The organic electroluminescence display device according to claim 1 , further comprising:
a plurality of light emitting elements provided on the first substrate, wherein each of the plurality of light emitting elements comprises an anode electrode, an organic electroluminescence film, and a cathode electrode, wherein the first inorganic layer provided over the plurality of light emitting elements; and
a first organic layer provided on the first inorganic layer;
wherein the second inorganic layer provided over the first inorganic layer and the first organic layer, wherein the second inorganic layer at least partially contacts with the first inorganic layer, and
wherein the first inorganic layer, the first organic layer, and the second inorganic layer are sequentially laminated from beneath above an edge portion of the first substrate.

8. The organic electroluminescence display device according to claim 7 ,
wherein a first region which includes the plurality of light emitting elements is arranged around a second region, where the first organic layer is in contact with the first inorganic layer, and the first inorganic layer, the first organic layer, and the second inorganic layer are sequentially laminated from beneath.

9. The organic electroluminescence display device according to claim 8 ,
wherein an upper surface of the first inorganic layer includes a first flat area and a second flat area,
wherein each of the first and second inorganic layers includes SiN,
wherein a lower surface of the second inorganic layer includes a first curved area and a third flat area,
wherein the third flat area of the lower surface is in contact with the second flat area of the upper surface, and
wherein the first organic layer lies between the first curved area and the first flat area.

10. The organic electroluminescence display device according to claim 9 ,
wherein the first inorganic layer, the first organic layer, and the second inorganic layer each have a side exposed to outside on the edge portion of the first substrate.

11. The organic electroluminescence display device according to claim 10 ,
further including a circuit layer between the first substrate and the plurality of light emitting elements; and
a second organic layer,
wherein the upper surface of the first inorganic layer includes a second curved area and a boundary between the second curved area and the second flat area, the second flat area lying between the boundary and the first flat area,
wherein each of the first and second curved areas ascends from the first substrate,
wherein the second organic layer sits on the boundary,
wherein the edge portion of the first substrate has a side which is flush with an edge of the first flat area and an edge of the first curved area.

12. The organic electroluminescence display device according to claim 11 ,
wherein a seal film, which includes the first and second inorganic layers and the first and second organic layers, seals the plurality of light emitting elements; and
wherein the first and second curved areas, the boundary, the first, second and third flat area are arranged in the second region.

13. The organic electroluminescence display device according to claim 1 , further comprising:
a plurality of light emitting elements provided on the first substrate, wherein each of the plurality of light emitting elements comprises an anode electrode, an organic electroluminescence film, and a cathode electrode,
wherein the first inorganic layer provided over the plurality of light emitting elements, wherein the first inorganic layer has a first flat area, which is a part of an upper surface thereof,
wherein the second inorganic layer provided over the first inorganic layer and at least partially contacts with the first inorganic layer, wherein the second inorganic layer has a first curved area, which is a part of a lower surface thereof, and
wherein the first flat area and the first curved area face each other without directly contacting with each other at an edge portion of the first substrate.

14. The organic electroluminescence display device according to claim 13 ,
wherein a first region which includes the plurality of light emitting elements is arranged around a second region, where the first flat area of the upper surface and the first curved area of the lower surface are opposed to each other.

15. The organic electroluminescence display device according to claim 14 ,
further comprising a first organic layer between the first and second inorg

Assignees

• Japan Display Inc

Inventors

• Sato Toshihiro
• Furuie Masamitsu

Classifications

• H10K50/8426

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

• H10K59/8731 Primary

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

• H01L51/5012

  Electricity · mapped topic

• H01L2251/301

  Electricity · mapped topic

• H01L51/5206

  Electricity · mapped topic