Organic electroluminescence device, production method for organic electroluminescence device, illumination device and display device

Patent metadata

Field	Value
Publication number	US-10418592-B2
Application number	US-201615773573-A
Country	US
Kind code	B2
Filing date	Nov 15, 2016
Priority date	Nov 16, 2015
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

An organic electroluminescence device according to an aspect of the disclosure includes a base material including one face provided with a recessed portion; and a light emitting element including a reflective layer provided on at least a surface of the recessed portion, a filling layer having optical transparency and filling the inside of the recessed portion with the reflective layer interposed between the filling layer and the recessed portion, a first electrode having optical transparency and provided on at least an upper-layer side of the filling layer, an organic layer containing at least a light emitting layer and provided on an upper layer of the first electrode, a second electrode having optical transparency and provided on an upper-layer side of the organic layer, and an edge cover layer covering at least an end portion of the first electrode, and in the organic electroluminescence device, an upper face of the first electrode at a position of the recessed portion is positioned below a plane including an upper face of the reflective layer, and the end portion of the first electrode is located inside the recessed portion and at a distance from the reflective layer.

First claim

The invention claimed is:

1. An organic electroluminescence device comprising:
a substrate;
a flattening resin layer provided on the substrate, the flattening resin layer including one face on which a recessed portion is provided;
a reflective layer provided on at least a surface of the recessed portion;
a filling layer having optical transparency and filling a portion of an inside of the recessed portion via the reflective layer interposed between the filling layer and the recessed portion;
a first electrode having optical transparency and provided above the filling layer;
an organic layer containing at least a light emitting layer and provided on an upper layer of the first electrode;
a second electrode having optical transparency and provided above the organic layer; and
an edge cover layer that covers at least an end portion of the first electrode, and does not cover another portion of the first electrode, wherein
the another portion of the first electrode is in contact with the reflective layer at an upper face of the flattening resin layer,
an upper face of the first electrode at a position of the recessed portion is positioned below a plane including an upper face of the reflective layer, and
the end portion of the first electrode is located inside the recessed portion and at a distance from the reflective layer.

2. The organic electroluminescence device according to claim 1 , wherein an end portion of the edge cover layer is defined in a pattern shape following a shape of a circumference of the recessed portion in a direction normal to the substrate.

3. The organic electroluminescence device according to claim 1 , including a plurality of unit light emitting regions separated from one another; wherein
the unit light emitting regions each include a first region where a central portion of the first electrode is located and a second region where the end portion of the first electrode is located, and
the recessed portion is provided in the second region.

4. The organic electroluminescence device according to claim 3 , wherein the recessed portion is also provided in the first region.

5. The organic electroluminescence device according to claim 3 , wherein
the recessed portion is not provided in the first region, and
upper faces of the reflective layer, the first electrode, and the organic layer are smooth.

6. The organic electroluminescence device according to claim 3 , wherein
a second recessed portion is provided adjacent to the recessed portion in the second region, and
the end portion of the first electrode is located at a distance from the reflective layer inside the second recessed portion.

7. The organic electroluminescence device according to claim 6 , wherein
a cross-sectional shape of the second recessed portion is a parabola shape, and
the second recessed portion is defined to include the end portion of the first electrode as a focal point.

8. An illumination device comprising:
a base material;
a flattening resin layer provided on the base material, the flattening resin layer including one face on which a recessed portion is provided;
a reflective layer provided on at least a surface of the recessed portion;
a filling layer having optical transparency and filling a portion of an inside of the recessed portion via the reflective layer interposed between the filling layer and the recessed portion;
a first electrode having optical transparency and provided above the filling layer;
an organic layer containing at least a light emitting layer and provided on an upper layer of the first electrode;
a second electrode having optical transparency and provided above the organic layer; and
an edge cover layer that covers at least an end portion of the first electrode, and does not cover another portion of the first electrode, wherein
the another portion of the first electrode is in contact with the reflective layer at an upper face of the flattening resin layer,
an upper face of the first electrode at a position of the recessed portion is positioned below a plane including an upper face of the reflective layer, and
the end portion of the first electrode is located inside the recessed portion and at a distance from the reflective layer.

9. A display device comprising:
a base material;
a flattening resin layer provided on the base material, the flattening resin layer including one face provided on which a recessed portion is provided;
a reflective layer provided on at least a surface of the recessed portion;
a filling layer having optical transparency and filling a portion of an inside of the recessed portion via the reflective layer interposed between the filling layer and the recessed portion;
a first electrode having optical transparency and provided above the filling layer;
an organic layer containing at least a light emitting layer and provided on an upper layer of the first electrode;
a second electrode having optical transparency and provided above the organic layer; and
an edge cover layer that covers at least an end portion of the first electrode, and does not cover another portion of the first electrode, wherein
the another portion of the first electrode is in contact with the reflective layer at an upper face of the flattening resin layer,
an upper face of the first electrode at a position of the recessed portion is positioned below a plane including an upper face of the reflective layer, and
the end portion of the first electrode is located inside the recessed portion and at a distance from the reflective layer.

Assignees

• Sharp Kk

Inventors

• Inoue Satoshi
• Kikuchi Katsuhiro
• Kawato Shinichi
• Koike Eiji

Classifications

• G09F9/00

  Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements (in which the variable information is permanently attached to a movable support G09F11/00; abacus G06C1/00; slide-rules G06G1/00) · CPC title

• G09F9/30

  in which the desired character or characters are formed by combining individual elements (panels comprising a number of electrodes in a single cell controlling light arriving from an independent light source, e.g. electro-optical or magneto-optical cell, G02F1/00) · CPC title

• H01L51/5209

  Electricity · mapped topic

• H01L51/5072

  Electricity · mapped topic

• H01L27/3246

  Electricity · mapped topic