Organic electroluminescence display device

Patent metadata

Field	Value
Publication number	US-9608232-B2
Application number	US-201615181592-A
Country	US
Kind code	B2
Filing date	Jun 14, 2016
Priority date	Dec 4, 2013
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

The organic electroluminescence display device has a circuit board, an element layer which contains an organic electrode luminescence film and a positive electrode and a negative electrode sandwiching the organic electroluminescence film and which is formed on the circuit board, and a sealing film sealing the element layer. The sealing film contains an inorganic layer covering the element layer and an organic layer formed between a part of the element layer and a part of the inorganic layer. The upper surface of the element layer has an inorganic contact area contacting the inorganic layer and an organic contact area contacting the organic layer. The organic contact area is a hollow in the upper surface of the element layer. The area of the upper surface of the organic layer is smaller than the area of the lower surface contacting the inner surface of the hollow.

First claim

What is claimed is:

1. An organic electroluminescence display device comprising:
a circuit board;
an element layer which contains an organic electroluminescence film and a positive electrode and a negative electrode sandwiching the organic electroluminescence film and which is formed on the circuit board;
a partition wall partitioning the element layer into pieces for pixels; and
a sealing film sealing the element layer,
wherein one of the positive electrode and negative electrode is a common electrode on a top surface of the element layer,
the common electrode lies over the partition wall, whereby having an upper surfaces along the partition walls, the upper surfaces including a first flat surface over the partition wall, a second surface being closer to the circuit board than the first surface, and an inclined surface between the first surface and the second surface,
the sealing film contains an inorganic layer covering the element layer and contains an organic layer formed between a part of the common electrode and a part of the inorganic layer;
the organic layer sits on a position between the second flat surface and the inclined surface and in contact with the common electrode,
the upper surfaces of the common electrode have an inorganic contact area contacting the inorganic layer and have an organic contact area contacting the organic layer around the position between the second flat surface and the inclined surface; and
the organic layer has an upper surface which is smaller than a lower surface thereof, the lower surface contacting the common electrode around the position between the second flat surface and the inclined surface.

2. The organic electroluminescence display device of claim 1 ,
wherein the positive electrode is two or more pixel electrodes under the organic electroluminescence film and the negative electrode is the common electrode on the organic electroluminescence film.

3. The organic electroluminescence display device of claim 2 ,
wherein the upper surfaces of the common electrode have the inorganic contact area and the organic contact area in an area over each of the pixel electrodes.

4. The organic electroluminescence display device of claim 2
wherein the partition wall is an insulating layer sitting between an edge of each of the pixel electrodes and the common electrode,
wherein the upper surfaces of the common electrode have a protruding part along a shape of the insulating layer, whereby relatively having a hollow from the second flat surface, which is lower than the protruding part over each of the pixel electrodes and is adjacent to the protruding part, to a rising area of the protruding part.

5. The organic electroluminescence display device of claim 1 ,
wherein the organic contact area is completely surrounded by the inorganic contact area.

Assignees

• Japan Display Inc

Inventors

• Kamiya Akinori

Classifications

• H10K59/8731

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

• H10K50/8426

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

• H10K59/8722 Primary

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

• H01L27/322

  Electricity · mapped topic

• H01L51/5246 Primary

  Electricity · mapped topic