Light-emitting module and light-emitting device

Patent metadata

Field	Value
Publication number	US-9478593-B2
Application number	US-201414541650-A
Country	US
Kind code	B2
Filing date	Nov 14, 2014
Priority date	Nov 4, 2011
Publication date	Oct 25, 2016
Grant date	Oct 25, 2016

Abstract

Provided is a light-emitting module from which light with uniform brightness can be extracted. Further, provided is a beautiful light-emitting module in which Newton's rings are not observed. The light-emitting module includes a first substrate, a light-emitting element formed on one surface side of the first substrate, a second substrate, a conductive spacer maintaining the gap between the first substrate and the second substrate, and a space in which the light-emitting element is sealed between the first substrate and the second substrate. Further, the pressure in the space is lower than or equal to the atmospheric pressure. Furthermore, the conductive spacer is electrically connected to the second electrode in a position overlapping with a partition provided over the first substrate so as to reduce a voltage drop occurring in the second electrode.

First claim

What is claimed is:

1. A display device comprising:
a first substrate;
a first electrode over the first substrate;
a transistor over the first substrate, the transistor being electrically connected to the first electrode
a second electrode over the first substrate;
a first layer containing a light-emitting organic compound between the first electrode and the second electrode;
a partition over the first electrode;
a second substrate over the first substrate; and
a conductive spacer maintaining a gap between the first substrate and the second substrate,
wherein the conductive spacer is electrically connected to the second electrode in a position overlapping with the partition, and
wherein the conductive spacer comprises an edge in which a corner portion is chamfered to have a curved surface.

2. The display device according to claim 1 ,
wherein the conductive spacer provided over the second substrate.

3. The display device according to claim 1 , further comprising a space between the first substrate and the second substrate,
wherein a pressure in the space is lower than or equal to an atmospheric pressure.

4. The display device according to claim 1 , further comprising:
a second layer containing a light-emitting organic compound between the first electrode and the second electrode; and
an intermediate layer between the first layer and the second layer,
wherein the intermediate layer contains an electron-transport substance and a donor substance.

5. The display device according to claim 1 ,
wherein the edge is electrically connected to the second electrode.

6. The display device according to claim 1 ,
wherein the conductive spacer has a stripe shape, a vein shape, a lattice shape, or a mesh shape.

7. The display device according to claim 1 ,
wherein the conductive spacer has a layered structure in which a titanium film is provided over an aluminum film.

8. The display device according to claim 1 ,
wherein the conductive spacer includes at least one of aluminum, copper, chromium, tantalum, titanium, molybdenum, and tungsten.

9. The display device according to claim 1 ,
wherein the conductive spacer comprises a plurality of layers, and
wherein a layer with a lower reflectance than another layer in the conductive spacer is provided on a second substrate side.

10. The display device according to claim 9 ,
wherein the layer with the lower reflectance is a colored conductive layer or a colored insulating layer.

11. The display device according to claim 1 , further comprising a color filter that extends between the second substrate and the conductive spacer.

12. The display device according to claim 1 , wherein the transistor comprises an oxide semiconductor in a channel formation region.

13. A display device comprising:
a first substrate;
a first electrode over the first substrate;
a transistor over the first substrate, the transistor being electrically connected to the first electrode
a second electrode over the first substrate;
a first layer containing a light-emitting organic compound between the first electrode and the second electrode;
a partition over the first electrode;
a second substrate over the first substrate; and
a conductive spacer between the second electrode and the partition, the conductive spacer maintaining a gap between the first substrate and the second substrate,
wherein the conductive spacer is electrically connected to the second electrode in a position overlapping with the partition.

14. The display device according to claim 13 , further comprising a space between the first substrate and the second substrate,
wherein a pressure in the space is lower than or equal to an atmospheric pressure.

15. The display device according to claim 13 , further comprising:
a second layer containing a light-emitting organic compound between the first electrode and the second electrode; and
an intermediate layer between the first layer and the second layer,
wherein the intermediate layer contains an electron-transport substance and a donor substance.

16. The display device according to claim 13 , further comprising a color filter that extends between the second substrate and the conductive spacer.

17. The display device according to claim 13 ,
wherein the conductive spacer has a stripe shape, a vein shape, a lattice shape, or a mesh shape.

18. The display device according to claim 13 ,
wherein the conductive spacer has a layered structure in which a titanium film is provided over an aluminum film.

19. The display device according to claim 13 ,
wherein the conductive spacer include at least one of aluminum, copper, chromium, tantalum, titanium, molybdenum, and tungsten.

20. The display device according to claim 13 , wherein the transistor comprises an oxide semiconductor in a channel formation region.

Assignees

• Semiconductor Energy Lab

Inventors

• Yamazaki Shunpei
• Hirakata Yoshiharu
• Hamada Takashi

Classifications

• H10K50/828

  Transparent cathodes, e.g. comprising thin metal layers · CPC title

• H10K50/818

  Reflective anodes, e.g. ITO combined with thick metallic layers · CPC title

• H10K59/80518

  Reflective anodes, e.g. ITO combined with thick metallic layers · CPC title

• H10K59/80524

  Transparent cathodes, e.g. comprising thin metal layers · CPC title

• H10K50/8428 Primary

  Vertical spacers, e.g. arranged between the sealing arrangement and the OLED · CPC title