Organic light-emitting display device

Patent metadata

Field	Value
Publication number	US-10707447-B2
Application number	US-201816003873-A
Country	US
Kind code	B2
Filing date	Jun 8, 2018
Priority date	Jan 15, 2018
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

An organic light-emitting display device includes: a substrate; a first organic light-emitting layer disposed on the substrate; a pixel defining film disposed on the first organic light-emitting layer and having a first opening, which at least partially exposes the first organic light-emitting layer; and an optical path converter disposed on the pixel defining film to overlap with the first organic light-emitting layer and including a first optical path converting member, which has a first refractive index, and a second optical path converting member, which has a second refractive index that is lower than the first refractive index.

First claim

What is claimed is:

1. An organic light-emitting display device comprising:
a substrate;
a pixel defining film disposed on the substrate and including a first opening;
a first organic light-emitting layer on the pixel defining film, and at least a portion of the first organic light-emitting layer is disposed on the first opening of the pixel defining film; and
an optical path converter on the pixel defining film and overlapping with the first organic light-emitting layer, the optical path converter comprising a first optical path converting member having a first refractive index and a second optical path converting member having a second refractive index that is lower than the first refractive index,
wherein:
the first optical path converting member includes a first surface, a second surface opposing the first surface of the first optical path converting member and being shorter than the first surface of the first optical path converting member, a first side surface connecting a first side of the first surface and a first side of the second surface of the first optical path converting member, and a second side surface connecting a second side of the first surface and a second side of the second surface of the first optical path converting member,
the second optical path converting member surrounds the first and second side surfaces of the first optical path converting member, and
a length of the second surface of the first optical path converting member is greater than a length of the first opening of the pixel defining film.

2. The organic light-emitting display device of claim 1 , wherein the first optical path converting member has a trapezoidal cross-sectional shape.

3. The organic light-emitting display device of claim 1 , wherein the optical path converter further comprises a planarization layer between the pixel defining film and the first optical path converting member.

4. The organic light-emitting display device of claim 3 , wherein a refractive index of the planarization layer is higher than or equal to the first refractive index.

5. The organic light-emitting display device of claim 1 , further comprising:
a second organic light-emitting layer on the substrate and to emit light of a different color from the first organic light-emitting layer,
wherein:
the pixel defining film further includes a second opening that at least partially exposes the second organic light-emitting layer and has a different length from the first opening,
the optical path converter further comprises a third optical path converting member on the pixel defining film and overlapping with the second organic light-emitting layer, the third optical path converting member having the first refractive index,
the third optical path converting member includes a first surface, a second surface opposing the first surface of the third optical path converting member and being shorter than the first surface of the third optical path converting member, a first side surface connecting a first side of the first surface and a first side of the second surfaces of the third optical path converting member, and a second side surface connecting a second side of the first surface and a second side of the second surface of the third optical path converting member, and
the length of the second surface of the first optical path converting member is different from a length of the second surface of the third optical path converting member.

6. The organic light-emitting display device of claim 1 , further comprising:
an encapsulation layer on the optical path converter,
wherein the encapsulation layer is a glass insulating substrate.

7. The organic light-emitting display device of claim 1 , further comprising:
an encapsulation layer between the pixel defining film and the first optical path converting member,
wherein the encapsulation layer comprises an organic layer and an inorganic layer.

8. The organic light-emitting display device of claim 1 , wherein the second optical path converting member is an air layer.

9. The organic light-emitting display device of claim 1 , wherein the second optical path converting member is in direct contact with the first and second side surfaces of the first optical path converting member.

10. The organic light-emitting display device of claim 1 , wherein the optical path converter further comprises a third optical path converting member, the third optical path converting member surrounding the first optical path converting member on an outside of the first optical path converting member.

11. The organic light-emitting display device of claim 10 , wherein the third optical path converting member has a trapezoidal cross-sectional shape.

12. An organic light-emitting display device comprising:
a substrate;
a pixel defining film disposed on the substrate and including a first opening;
an organic light-emitting layer on the pixel defining film, and at least a portion of the organic light-emitting layer is disposed on the first opening of the pixel defining film;
and
an optical path converter on the pixel defining film and overlapping with the organic light-emitting layer, the optical path converter comprising a first optical path converting member having a trapezoidal cross-sectional shape and a second optical path converting member surrounding side surfaces of the first optical path converting member,
wherein:
a refractive index of the first optical path converting member is higher than a refractive index of the second optical path converting member, and
a length of a top surface of the first optical path converting member is greater than a length of the first opening of the pixel defining film.

13. The organic light-emitting display device of claim 12 , wherein
the first optical path converting member includes a bottom surface facing the top surface of the first optical path converting member and being longer than the top surface of the first optical path converting member, a first side surface connecting a first side of the top surface and a first side of the bottom surface of the first optical path converting member, and a second side surface connecting a second side of the top surface and a second side of the bottom surface of the first optical path converting member, and
the second optical path converting member surrounds the first and second side surfaces of the first optical path converting member.

14. The organic light-emitting display device of claim 12 , wherein the optical path converter further comprises a planarization layer between the pixel defining film and the first optical path converting member.

15. The organic light-emitting display device of claim 14 , wherein the planarization layer comprises an inorganic layer.

16. The organic light-emitting display device of claim 12 , further comprising:
an encapsulation layer on the optical path converter,
wherein the encapsulation layer is a glass insulating substrate.

17. The organic light-emitting display device of claim 12 , further comprising:
an encapsulation layer between the pixel defining film and the first optical path converting member,
wherein the encapsulation layer comprises an organic layer and an inorganic layer.

18. The organic light-emitting display device of claim 12 , wherein the optical path converter further comprises a third optical path converting member surrounding the first optical path converting member on an outside of the first optical path converting member.

19. The organic light-emitting display device of claim 18 , wher

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Suk
• Kim Gee Bum
• Park Sung Kook

Classifications

• H10K59/879 Primary

  comprising refractive means, e.g. lenses · CPC title

• H10K59/873

  Encapsulations · CPC title

• H10K59/8722

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title

• H10K59/80515

  characterised by their shape · CPC title

• H10K50/858

  comprising refractive means, e.g. lenses · CPC title