Display device including a light emitting layer containing quantum dots

Patent metadata

Field	Value
Publication number	US-9515285-B2
Application number	US-201514708869-A
Country	US
Kind code	B2
Filing date	May 11, 2015
Priority date	May 16, 2014
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

A display device includes a first insulating layer provided on a first surface of a first substrate; a second insulating layer including a plurality of openings exposing a part of the first insulating layer; and a plurality of light emitting elements including a first electrode located in each of the plurality of openings, the first electrode being located on a part of the first insulating layer in the opening and continuously on the second insulating layer and including an inclining surface on a side surface of the second insulating layer; a light emitting layer containing quantum dots, the light emitting layer being located on a part of the first electrode in the opening and including a side surface facing the inclining surface of the first electrode; and a second electrode located on the light emitting layer.

First claim

The invention claimed is:

1. A display device including a plurality of pixels on a substrate, each of the plurality of pixels comprising:
a first electrode on the substrate;
a quantum dot material on the first electrode;
a second electrode on the quantum dot material, the second electrode has a light transparent property;
a color conversion material on the first electrode, the color conversion material is located adjacent to and in contact with a side surface of the quantum dot material; and
a light shielding film on the quantum dot material,
wherein each of the plurality of pixels has a first region and a second region,
wherein in the first region in plan view, the quantum dot material overlaps the first electrode, the second electrode overlaps the quantum dot material, and the light shielding film overlaps the quantum dot material, and
wherein in the second region in plan view, the color conversion material overlaps the first electrode and the light shielding film does not overlap the color conversion material.

2. The display device according to claim 1 , wherein a first insulation film is arranged on the substrate,
wherein a second insulation film is arranged on the first insulation film and has an opening which exposes the first insulation film and which has an inclining surface and a bottom surface, and
wherein the first electrode is arranged on the inclining surface and the bottom surface of the opening of the second insulation film.

3. The display device according to claim 1 , wherein the pixel has a third region,
wherein in the third region in plan view, the color conversion material overlaps the first electrode and the second electrode overlaps the color conversion material, and
wherein in plan view, the third region is arranged between the first region and the second region.

4. A display device including a plurality of pixels on a substrate, each of the plurality of pixels comprising:
a first layer including a first electrode on the substrate;
a second layer including a quantum dot material and a color conversion material on the first layer, the color conversion material is located adjacent to and in contact with a side surface of the quantum dot material;
a third layer including a second electrode on the second layer, the second electrode has a light transparent property; and
a light shielding film on the quantum dot material,
wherein each of the plurality of pixels has a first region and a second region,
wherein in the first region in plan view, the quantum dot material overlaps the first electrode, the second electrode overlaps the quantum dot material, and a light shielding film overlaps the quantum dot material,
wherein in the second region in plan view, the color conversion material overlaps the first electrode and is arranged beside the light shielding film, and
wherein in the first region, the quantum dot material is located in contact with the first electrode wherein in the second region in plan view, the light shielding film does not overlap the color conversion material.

5. The display device according to claim 4 , wherein a first insulation film is arranged on the substrate,
wherein a second insulation film is arranged on the first insulation film and has an opening which exposes the first insulation film and which has an inclining surface and a bottom surface, and
wherein the first electrode is arranged on the inclining surface and the bottom surface of the opening of the second insulation film.

Assignees

• Japan Display Inc

Inventors

• Sato Toshihiro

Classifications

• H10K59/878

  comprising reflective means · CPC title

• H10K59/80521

  characterised by their shape · CPC title

• H10K59/80515

  characterised by their shape · CPC title

• H10K50/813

  characterised by their shape · CPC title

• H10K59/121 Primary

  characterised by the geometry or disposition of pixel elements · CPC title