Organic electro-luminescence display device

Patent metadata

Field	Value
Publication number	US-9583737-B2
Application number	US-201514976058-A
Country	US
Kind code	B2
Filing date	Dec 21, 2015
Priority date	Dec 4, 2013
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

An organic electro-luminescence display device includes a first substrate, plural pedestals which are provided in a convex shape on the first substrate and have inclined side surfaces, plural first electrodes respectively provided on the respective side surfaces of the pedestals, an organic electro-luminescence film which is provided above the plural pedestals and includes a light-emitting layer laminated on the plural fist electrodes, and a second electrode which is provided above the plural pedestals and is laminated on the organic electro-luminescence film. Light generated in the light-emitting layer is transmitted between a first reflection surface and a second reflection surface. The second electrode includes light transmission parts, through which the light passes, above upper end parts of the pedestals. A surface of the second electrode facing the organic electro-luminescence film is the second reflection surface except for the light transmission parts.

First claim

What is claimed:

1. A display device comprising:
a substrate including a plurality of pixels,
each of the plurality of pixels comprising:
a convex portion located on the substrate, and having an upper surface and a side surface;
a first electrode located on at least the side surface;

a light-emitting layer having a first main surface and a second main surface opposite to the first main surface, the first main surface facing at least the side surface, the light-emitting layer being directly in contact with the first electrode between the first main surface and the side surface;
a first reflection surface facing the first main surface;
a second reflection surface facing the second main surface; and
a second electrode located above at least the side surface via the light-emitting layer and the first electrode, including the second reflection surface, and having an opening just above the upper surface, the second reflection surface having no portion in the opening.

2. The display device according to claim 1 , wherein the first reflection surface is a surface of the first electrode.

3. The display device according to claim 1 , further comprising an insulation layer provided between two of the pixels adjacent each other,
wherein the insulation layer covers an end part of the first electrode.

4. The display device according to claim 1 further comprising a mirror layer arranged below the convex portion,
wherein the mirror layer includes the first reflection surface.

5. The display device according to claim 4 , wherein the first electrode has light transmissivity, and
the convex portion includes a color filter.

6. The display device according to claim 4 , wherein the mirror layer has conductivity and is electrically connected to the first electrode.

7. The display device according to claim 1 , wherein the first electrode and the light-emitting layer are not located above the upper surface.

8. The display device according to claim 1 , wherein the first electrode is located on the upper surface, and
the light-emitting layer is located above the upper surface via the first electrode.

9. The display device according to claim 1 , further comprising a transparent conductive layer on the second electrode,
wherein the transparent conductive layer faces the upper surface and the side surface.

10. The display device according to claim 1 , wherein the plurality of pixels include a first pixel having a first convex portion and a second pixel having a second convex portion, the second pixel being adjacent to the first pixel,
wherein a concave part between the first and second convex portions is filled with a flattening film.

11. The display device according to claim 1 , wherein the convex portion has a truncated shape.

12. The display device according to claim 1 , wherein light generated in the light-emitting layer is transmitted between the first reflection surface and the second reflection surface, and
the light passes through the opening.

13. A display device comprising:
a substrate;
a plurality of convex portions on the substrate, each of the convex portions having an upper surface and a side surface;
a plurality of first electrodes each located on at least the side surface;
a light-emitting layer having a portion, the portion of the light-emitting layer facing at least the side surface, the light-emitting layer being directly in contact with at least one of the first electrodes between the portion of the light-emitting layer and the side surface; and
a second electrode facing at least the side surface via the light-emitting layer and the one of the first electrodes,
wherein the second electrode has an opening just above the upper surface and a second reflection surface facing the light-emitting layer, and
the second reflection surface has no portion in the opening.

14. The display device according to claim 13 , wherein each of the first electrodes has a first reflection surface facing the light-emitting layer.

15. The display device according to claim 13 , further comprising a plurality of mirror layers each arranged below each of the convex portions,
wherein each of the mirror layers has a first reflection surface facing the light-emitting layer.

16. The display device according to claim 15 , wherein each of the mirror layers has conductivity and is electrically connected to each of the first electrodes.

17. The display device according to claim 13 , wherein each of the first electrodes overlaps the upper surface and the side surface.

18. The display device according to claim 13 , wherein the light-emitting layer overlaps the upper surface and the side surface.

19. The display device according to claim 13 , wherein the second electrode overlaps the plurality of convex portions.

20. The display device according to claim 13 , wherein the first electrodes and the light-emitting layer are not located above the upper surface.

Assignees

• Japan Display Inc

Inventors

• Sato Toshihiro

Classifications

• H10K59/873

  Encapsulations · CPC title

• H10K59/875

  Arrangements for extracting light from the devices · CPC title

• H10K59/876

  comprising a resonant cavity structure, e.g. Bragg reflector pair · CPC title

• H10K59/80521

  characterised by their shape · CPC title

• H10K59/878

  comprising reflective means · CPC title