Organic electroluminescence device, illumination device, and display device

Patent metadata

Field	Value
Publication number	US-10381600-B2
Application number	US-201615758408-A
Country	US
Kind code	B2
Filing date	Aug 10, 2016
Priority date	Sep 10, 2015
Publication date	Aug 13, 2019
Grant date	Aug 13, 2019

Abstract

An organic electroluminescence device includes a base material including a recessed portion on one face side, and a light emitting element. The light emitting layer including a reflective layer disposed at least on a surface of the recessed portion, a filling layer that has optical transparency and is filled and disposed in the recessed portion with the reflective layer interposed between the recessed portion and the filling layer, a first electrode that has optical transparency and is disposed at least on an upper-layer side of the filling layer, an organic layer that includes at least a light emitting layer and is disposed on an upper layer of the first electrode, and a second electrode that has optical transparency and is disposed on an upper-layer side of the organic layer. The organic electroluminescence device includes a display region divided into a plurality of unit regions separated from each other. The unit regions each has a light emitting area and a non emissive area that are partitioned. The light emitting area includes the light emitting element, and the non emissive area includes a light absorption layer.

First claim

The invention claimed is:

1. A display device comprising:
a base material including a recessed portion on one face side; and
a light emitting element including:
a reflective layer being disposed at least on a surface of the recessed portion,
a filling layer having optical transparency, the filling layer being filled at an inside of the recessed portion via the reflective layer,
a first electrode having optical transparency, the first electrode being disposed at least on an upper-layer side of the filling layer,
an organic layer including at least a light emitting layer, the organic layer being disposed on an upper-layer side of the first electrode, and
a second electrode having optical transparency, the second electrode being disposed on an upper-layer side of the organic layer, wherein

a display region includes a plurality of unit regions separated from each other,
each of the plurality of unit regions includes a light emitting area and a non-emissive area being partitioned,
the light emitting element is provided in the light emitting area,
the non-emissive area includes a light absorption layer,
the light absorption layer is provided between the base material and the reflective layer in the light emitting area and the non-emissive area, and
the light absorption layer in the light emitting area includes the recessed portion.

2. The display device according to claim 1 , wherein
a color filter substrate including a color filter and the light absorption layer is disposed on the base material,
the color filter corresponds to the light emitting area, and
the light absorption layer partitions the color filter and corresponds to the non-emissive area.

3. The display device according to claim 1 , wherein the light emitting area and the non-emissive area satisfy a ratio of the light emitting area to the light emitting area and the non-emissive area of less than 50%.

4. The display device according to claim 1 , wherein
the recessed portion includes a plurality of recessed portions,
the plurality of recessed portions are disposed in the light emitting area, and
the reflective layer is disposed in the plurality of recessed portions.

5. The display device according to claim 1 , wherein a portion of the reflective layer is in contact with a portion of the first electrode.

6. The display device according to claim 1 , wherein a lower face of the first electrode at a position inside the recessed portion is positioned lower than a plane including one face side of the base material.

7. The display device according to claim 1 , wherein
the light emitting area includes a plurality of active elements,
the plurality of active elements independently control light emission, and
the plurality of active elements are electrically connected to the light emitting element through the reflective layer.

8. The display device according to claim 7 , wherein the plurality of active elements are made of an oxide semiconductor.

9. The display device according to claim 1 , further comprising:
an antireflective layer disposed on the light emitting element.

10. A display device comprising:
a base material including a recessed portion on one face side; and
a light emitting element including:
a reflective layer being disposed at least on a surface of the recessed portion,
a filling layer having optical transparency, the filling layer being filled at an inside of the recessed portion via the reflective layer,
a first electrode having optical transparency, the first electrode being disposed at least on an upper-layer side of the filling layer,
an organic layer including at least a light emitting layer, the organic layer being disposed on an upper-layer side of the first electrode, and
a second electrode having optical transparency, the second electrode being disposed on an upper-layer side of the organic layer, wherein

a display region includes a plurality of unit regions separated from each other,
each of the plurality of unit regions includes a light emitting area and a non-emissive area being partitioned,
the light emitting element is provided in the light emitting area,
the non-emissive area includes a light absorption layer,
a resin layer including the recessed portion, and the light absorption layer disposed along an upper face of the resin layer including the recessed portion are disposed on the base material.

11. The display device according to claim 10 , wherein
a color filter substrate including a color filter and the light absorption layer is disposed on the base material,
the color filter corresponds to the light emitting area, and
the light absorption layer partitions the color filter and corresponds to the non-emissive area.

12. The display device according to claim 10 , wherein the light emitting area and the non-emissive area satisfy a ratio of the light emitting area to the light emitting area and the non-emissive area of less than 50%.

13. The display device according to claim 10 , wherein
the recessed portion includes a plurality of recessed portions,
the plurality of recessed portions are disposed in the light emitting area, and
the reflective layer is disposed in the plurality of recessed portions.

14. The display device according to claim 10 , wherein a portion of the reflective layer is in contact with a portion of the first electrode.

15. The display device according to claim 10 , wherein a lower face of the first electrode at a position inside the recessed portion is positioned lower than a plane including one face side of the base material.

16. The display device according to claim 10 , wherein
the light emitting area includes a plurality of active elements,
the plurality of active elements are configured to independently control light emission, and
the plurality of active elements are electrically connected to the light emitting element through the reflective layer.

17. The display device according to claim 16 , wherein the plurality of active elements are made of an oxide semiconductor.

18. The display device according to claim 10 , further comprising:
an antireflective layer disposed on the light emitting element.

19. An illumination device comprising:
a base material including a recessed portion on one face side;
a light emitting element including:
a reflective layer disposed at least along a surface of the recessed portion;
a filling layer having optical transparency, the filling layer being filled at an inside of the recessed portion via the reflective layer;
a first electrode having optical transparency, the first electrode being at least on an upper-layer side of the filling layer;
an organic layer including at least a light emitting layer, the organic layer being disposed on an upper-layer side of the first electrode; and
a second electrode having optical transparency and light reflectivity, the second electrode being disposed on an upper-layer side of the organic layer, and

a display region including a plurality of unit regions separated from each other, wherein
each of the plurality of unit regions includes a light emitting area and a non-emissive area that is partitioned,
the light emitting element is provided in the light emitting area,
the non-emissive area includes a light absorption layer,
the light absorption layer is provided between the base material and the reflective layer in the light emitting area and the non-emissive area, and
the light absorption layer in the light emitting area includes the recessed portion.

20

Assignees

• Sharp Kk

Inventors

• Uchida Hideki
• Kikuchi Katsuhiro
• Isomura Yoshiyuki
• Koike Eiji
• Inoue Satoshi
• Tsukamoto Yuto
• Ohara Masanori
• ITO Asae

Classifications

• H05B33/10

  Apparatus or processes specially adapted to the manufacture of electroluminescent light sources · CPC title

• H05B33/12

  Light sources with substantially two-dimensional [2D] radiating surfaces · CPC title

• G02B5/20

  Filters (polarising elements G02B5/30) · CPC title

• H05B33/22

  characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers · CPC title

• G02B5/201

  in the form of arrays · CPC title