Organic light emitting display apparatus comprising a light conversion film and composite film comprising a light conversion film

Patent metadata

Field	Value
Publication number	US-11005053-B2
Application number	US-201816115086-A
Country	US
Kind code	B2
Filing date	Aug 28, 2018
Priority date	Aug 31, 2017
Publication date	May 11, 2021
Grant date	May 11, 2021

Abstract

An organic light emitting display apparatus can include a substrate including an active area and a non-active area; a bending area in the active area of the substrate; a non-bending area in the active area of the substrate, the non-bending area being adjacent to the bending area; and a plurality of light conversion particles disposed in the active area of the substrate.

First claim

What is claimed is:

1. An organic light emitting display apparatus comprising:
a substrate including an active area and a non-active area;
a pixel array layer disposed on a first surface of the substrate, the pixel array layer overlapping with the active area;
a bending area in the active area of the substrate;
a non-bending area in the active area of the substrate, the non-bending area being adjacent to the bending area;
an optical film disposed on the second surface of the substrate overlapping the non-bending area; and
a light conversion film comprising a plurality of light conversion particles disposed in the bending area in the active area of the substrate,
wherein the optical film is disposed adjacent to the light conversion film and contacts an edge of the light conversion film without extending into the bending area, and
wherein the light conversion film includes a plurality of quantum dots in the bending area and the non-bending area is devoid of quantum dots.

2. The organic light emitting display apparatus of claim 1 , wherein the plurality of light conversion particles are quantum dots.

3. The organic light emitting display apparatus of claim 1 , further comprising:
a light conversion film disposed in the bending area of the substrate,
wherein the plurality of light conversion particles are included in the light conversion film.

4. The organic light emitting display apparatus of claim 3 , further comprising:
a light reflection layer disposed between the substrate and the light conversion film.

5. The organic light emitting display apparatus of claim 4 , wherein the light reflection layer is an ultraviolet reflection layer configured to reflect ultraviolet light.

6. The organic light emitting display apparatus of claim 1 , further comprising an encapsulation member covering the pixel array layer,
wherein the plurality of light conversion particles are disposed on a second surface opposite to the first surface of the substrate, and the substrate is disposed between the pixel array layer and the plurality of light conversion particles.

7. The organic light emitting display apparatus of claim 1 , further comprising:
a light conversion film disposed in the bending area of the substrate, wherein the plurality of light conversion particles are included in the light conversion film; and
a protective film disposed on the optical film and the light conversion film,
wherein the protective film covers a boundary portion between the light conversion film and the optical film.

8. The organic light emitting display apparatus of claim 1 , further comprising:
a plurality of pixels disposed in the bending area,
wherein the plurality of light conversion particles have different sizes based on a color set in each of the plurality of pixels in the bending area.

9. The organic light emitting display apparatus of claim 8 , wherein the plurality of light conversion particles include a red quantum dot, a green quantum dot, and a blue quantum dot.

10. A composite film comprising:
a base substrate;
a light reflection layer disposed in a first area of the base substrate;
a light conversion film disposed on the light reflection layer;
an optical film disposed in a second area of the base substrate, the second area being adjacent to the first area of the base substrate; and
a protective film covering the light conversion film and the optical film,
wherein the light conversion film contacts the optical film,
wherein a boundary portion between the light conversion film and the optical film has a step height,
wherein the optical film is disposed adjacent to the light conversion film and contacts an edge of the light conversion film without extending into the first area, and
wherein the light conversion film includes a plurality of quantum dots in the first area and the second area is devoid of quantum dots.

11. The composite film of claim 10 , wherein the light conversion film includes a plurality of light conversion particles.

12. The composite film of claim 10 , wherein a sum of a thickness of the light reflection layer and a thickness of the light conversion film is less than a thickness of the optical film.

13. The composite film of claim 10 , wherein the protective film covers the boundary portion between the light conversion film and the optical film.

14. An organic light emitting display apparatus comprising the composite film of claim 10 and a substrate,
wherein the composite film is disposed on the substrate.

15. An organic light emitting display apparatus comprising:
a pixel array layer including a plurality of pixels disposed across a bending area of the pixel array layer and a non-bending area of the pixel array layer;
an optical film disposed in the non-bending area;
a light conversion film disposed in the bending area;
a protective film disposed across a boundary between the non-bending area and the bending area,
wherein the optical film is disposed adjacent to the light conversion film and contacts an edge of the light conversion film without extending into the bending area,
wherein the light conversion film includes a plurality of quantum dots in the bending area and the non-bending area is devoid of quantum dots,
wherein the optical film in the non-bending area is thicker than the light conversion film in the bending area, and
wherein the plurality of quantum dots are arranged in a plurality of groups.

16. The organic light emitting display apparatus of claim 15 , wherein each of the plurality of groups overlaps with one of the plurality of pixels located in the bending area and is configured to convert light output by the one of the plurality of pixels into converted light having a wavelength that corresponds to a same color of the light output by the one of the plurality of pixels, and
wherein the wavelength of the converted light is longer than a wavelength of the light output by the one of the plurality of pixels.

17. The organic light emitting display apparatus of claim 15 , further comprising: a light reflection layer disposed between the light conversion film and the pixel array layer,
wherein a sum of a thickness of the light reflection layer and a thickness of the light conversion film is less than a thickness of the optical film.

18. The organic light emitting display apparatus of claim 17 , wherein the optical film includes a plurality of film layers,
wherein first portions of the protective film and the optical film form a first stacked structure in the non-bending area,
wherein second portions of the protective film, the light reflection layer and the light conversion film form a second stacked structure in the bending area, and
wherein a ratio of a thickness of the second stacked structure to a thickness of the first stacked structure is approximately 1:4.

Assignees

• Lg Display Co Ltd

Inventors

• Park Seongwoo
• Lee Moonsun
• Jung Haeyoon

Classifications

• H10K50/84

  Passivation; Containers; Encapsulations · CPC title

• H10K59/38 Primary

  comprising colour filters or colour changing media [CCM] · CPC title

• H10K50/856

  comprising reflective means · CPC title

• H10K59/35

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

• H10K50/868 Primary

  Arrangements for polarized light emission (H10K50/86 takes precedence) · CPC title