Display device, manufacturing method of display device, and electronic apparatus

Patent metadata

Field	Value
Publication number	US-9425435-B2
Application number	US-201314400235-A
Country	US
Kind code	B2
Filing date	May 31, 2013
Priority date	Jul 30, 2012
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

There is provided a display device ( 100 ) including a step forming member ( 14 ) which forms a step between a first region (s1) and a second region (s2) over a substrate ( 11 ) so that the first region (s1, 173 R) becomes higher than the second region (s2, 173 G) when viewed from the substrate ( 11 ), a first light emitting ( 173 R) layer transferred to the first region, and a second light emitting layer ( 173 G) transferred to the first region and the second region, and which has an emission wavelength shorter than an emission wavelength of the first light emitting layer.

First claim

The invention claimed is:

1. A display device comprising:
a step forming member which forms a step between a first region and a second region over a substrate so that the first region becomes higher than the second region when viewed from the substrate;
a first light emitting layer transferred to the first region; and
a second light emitting layer transferred to the first region and the second region, and which has an emission wavelength shorter than an emission wavelength of the first light emitting layer,
wherein the step forming member includes a color filter provided between the substrate and the first light emitting layer,
wherein the step forming member includes a first color filter provided between the substrate and the first light emitting layer, and a second color filter provided between the substrate and the second light emitting layer, and
wherein the step forming member is formed in a manner that a thickness of the first color filter is greater than a thickness of the second color filter.

2. The display device according to claim 1 ,
wherein the step forming member further forms a step between the second region and a third region over the substrate so that the second region becomes higher than the third region when viewed from the substrate, and
wherein the display device further includes a third light emitting layer formed in at least the third region, and which has an emission wavelength shorter than the emission wavelength of the second light emitting layer.

3. The display device according to claim 2 ,
wherein the third light emitting layer is formed in the first region, the second region, and the third region.

4. The display device according to claim 3 ,
wherein the third light emitting layer is transferred to the first region, the second region, and the third region.

5. The display device according to claim 1 ,
wherein the step forming member is a flattening insulating film provided between the substrate and the first light emitting layer and the second light emitting layer.

6. The display device according to claim 5 ,
wherein the step is formed in a manner that a thickness of the flattening insulating film in the first region is greater than a thickness of the flattening insulating film in the second region.

7. The display device according to claim 1 ,
wherein the step forming member includes a thin film transistor layer provided between the substrate and the first light emitting layer and the second light emitting layer, and
wherein the step forming member is formed by an unevenness of a surface of the thin film transistor layer.

8. The display device according to claim 1 ,
wherein a height of the step forming member is 1/100 or more of a width of the second region, or is 500 nanometers or more.

9. The display device according to claim 1 , further comprising: a pair of electrode layers provided so that the superimposed first light emitting layer and the second light emitting layer are between the pair of electrode layers in the first region,
wherein a thickness of the first light emitting layer and a thickness of the second light emitting layer are set so that an interval between the pair of electrode layers in the first region becomes an integral multiple of the emission wavelength of the first light emitting layer.

10. The display device according to claim 9 ,
wherein the pair of electrode layers are provided so that the second light emitting layer is between the pair of electrode layers in the second region, and
wherein the thickness of the second light emitting layer is set so that an interval between the pair of electrode layers in the second region becomes an integral multiple of the emission wavelength of the second light emitting layer.

11. A manufacturing method of a display device, the manufacturing method comprising:
transferring a first light emitting layer applied uniformly on a transfer body to a first region over a substrate and preventing the first light emitting layer from adhering to a second region over the substrate by a step formed between the first region and the second region; and
transferring a second light emitting layer having an emission wavelength shorter than an emission wavelength of the first light emitting layer to the first region and the second region.

12. The manufacturing method of a display device according to claim 11 ,
wherein the second light emitting layer is applied uniformly on a transfer body and transferred to the first region and the second region, and
wherein, at a time when the second light emitting layer is transferred, a contact pressure of the transfer body is adjusted so that the second light emitting layer is transferred to the second region.

13. The manufacturing method of a display device according to claim 11 ,
wherein in the step for transferring the second light emitting layer, the second light emitting layer is prevented from adhering to a third region over the substrate by a step formed between the second region and the third region.

14. The manufacturing method of a display device according to claim 13 , further comprising: forming a third light emitting layer in the first region, the second region, and the third region.

15. The manufacturing method of a display device according to claim 14 , wherein the third light emitting layer is formed by being applied uniformly on a transfer body and transferred to the first region, the second region, and the third region.

16. An electronic apparatus comprising:
a display device including
a step forming member which forms a step between a first region and a second region over a substrate so that the first region becomes higher than the second region when viewed from the substrate;
a first light emitting layer transferred to the first region; and
a second light emitting layer transferred to the first region and the second region, and which has an emission wavelength shorter than an emission wavelength of the first light emitting layer,
wherein the step forming member includes a color filter provided between the substrate and the first light emitting layer,
wherein the step forming member includes a first color filter provided between the substrate and the first light emitting layer, and a second color filter provided between the substrate and the second light emitting layer, and
wherein the step forming member is formed in a manner that a thickness of the first color filter is greater than a thickness of the second color filter.

17. A display device comprising:
a step forming member which forms a step between a first region and a second region over a substrate so that the first region becomes higher than the second region when viewed from the substrate;
a first light emitting layer transferred to the first region; and
a second light emitting layer transferred to the first region and the second region, and which has an emission wavelength shorter than an emission wavelength of the first light emitting layer,
wherein the step forming member includes a first color filter provided between the substrate and the first light emitting layer, and a second color filter provided between the substrate and the second light emitting layer, and
wherein the step forming member is formed in a manner that a thickness of the first color filter is greater than a thickness of the second color filter.

18. A display device comprising:
a step forming member which forms a step between a first region and a second region over a substrate so that the first region becomes higher than the second region when viewed fr

Assignees

• Sony Corp
• Joled Inc

Inventors

• Ando Makoto

Classifications

• H10K59/876

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

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K59/35 Primary

  comprising red-green-blue [RGB] subpixels · CPC title

• H01L51/5265

  Electricity · mapped topic

• H01L51/56 Primary

  Electricity · mapped topic