Display device including a color conversion layer

Patent metadata

Field	Value
Publication number	US-9575228-B2
Application number	US-201414522889-A
Country	US
Kind code	B2
Filing date	Oct 24, 2014
Priority date	Apr 3, 2014
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

A display device includes a display panel, a backlight unit and a color conversion layer. The color conversion layer includes light emitting particles and metal particles. The light emitting particles are configured to receive a first light and to generate a second light having a wavelength different from the first light. The metal particles are configured to receive the first light or the second light and to cause a surface plasmon resonance.

First claim

What is claimed is:

1. A display device comprising:
a display panel to emit a first light;
a backlight unit configured to provide the first light to the display panel; and
a color conversion layer which receives the first light from the display panel, the color conversion layer comprising:
a red color conversion layer; and
a green color conversion layer,
wherein each of the red color conversion layer and the green color conversion layer comprises:
light emitting particles configured to receive the first light and generate a second light having a wavelength different from the first light; and
metal particles configured to receive the first light or the second light and cause a surface plasmon resonance,
wherein
the metal particles of the red color conversion layer comprise first metal particles which comprise a first metal material and second metal particles which comprise a second metal material different from the first metal material, and
the metal particles of the green color conversion layer comprise third metal particles which comprise a third metal material and fourth metal particles which comprise a fourth metal material different from the third metal material.

2. The display device of claim 1 , wherein the light emitting particles and the metal particles are distributed in the color conversion layer.

3. The display device of claim 1 , wherein the color conversion layer comprises:
a light emitting particle layer comprising an entirety of the light emitting particles of the color conversion layer; and
a metal particle layer on the light emitting particle layer and comprising an entirety of the metal particles of the color conversion layer
wherein in a thickness direction of the color conversion layer, the metal particles of the metal particle layer are disposed non-overlapping with the light emitting particles of the light emitting particle layer.

4. The display device of claim 3 , wherein the metal particle layer for which the metal particles are disposed non-overlapping with the light emitting particles of the light emitting particle layer in the thickness direction of the color conversion layer, comprises a first metal particle layer and a second metal particle layer respectively disposed at opposing sides of the light emitting particle layer.

5. The display device of claim 1 , wherein the each color conversion layer comprises:
a light emitting particle layer comprising an entirety of the light emitting particles of the each color conversion layer;
a first metal particle layer on the light emitting particle layer and comprising an entirety of the first metal particles of the each color conversion layer; and
a second metal particle layer on the light emitting particle layer and comprising an entirety of the second metal particles of the each color conversion layer,
wherein in a thickness direction of the color conversion layer, the first and second metal particles of the first and second metal particle layers are each disposed non-overlapping with the light emitting particles of the light emitting particle layer.

6. The display device of claim 1 , wherein the each color conversion layer comprises:
a first light emitting metal layer in which an entirety of the light emitting particles and an entirety of the first metal particles of the each color conversion layer are distributed; and
a second metal particle layer on the first light emitting metal layer and comprising an entirety of the second metal particles of the each color conversion layer,
wherein in a thickness direction of the color conversion layer, the second metal particles of the second metal particle layer are disposed non-overlapping with the light emitting particles and the first metal particles of the light emitting particle layer.

7. The display device of claim 1 , wherein the each color conversion layer comprises:
a second light emitting metal layer in which an entirety of the light emitting particles and an entirety of the second metal particles of the each color conversion layer are distributed; and
a first metal particle layer on the second light emitting metal layer and comprising an entirety of the first metal particles of the each color conversion layer,
wherein in a thickness direction of the color conversion layer, the first metal particles of the first metal particle layer are disposed non-overlapping with the light emitting particles and the second metal particles of the light emitting particle layer.

8. The display device of claim 1 , wherein the first light is a blue light.

9. The display device of claim 1 , wherein
the display panel comprises a plurality of pixel areas, each of the pixel areas comprising:
a red pixel area;
a green pixel area; and
a blue pixel area,

the red color conversion layer is overlapped with the red pixel area; and
the green color conversion layer is overlapped with the green pixel area.

10. The display device of claim 9 , further comprising a scattering layer overlapped with the blue pixel area, wherein the scattering layer comprises scatter particles configured to scatter the first light.

11. The display device of claim 10 , wherein
an average particle diameter of the first metal particles and the second metal particles is greater than an average particle diameter of the third metal particles and the fourth metal particles.

12. The display device of claim 11 , wherein an average particle diameter of the scatter particles is smaller than the average particle diameter of the third metal particles and the fourth metal particles.

13. The display device of claim 1 , further comprising:
a band-pass filter between the color conversion layer and the display panel; and
a recycling layer on the color conversion layer and configured to reflect a portion of the first light passed through the color conversion layer.

14. The display device of claim 1 , wherein the metal particles comprise at least one selected from gold, silver, aluminum, platinum, palladium, cadmium, cobalt, ruthenium, copper, indium, nickel, iron and alloys thereof.

15. The display device of claim 1 , wherein a portion of the metal particles within the color conversion layer comprises a dielectric layer respectively thereon.

16. The display device of claim 15 , wherein the dielectric layer comprises:
a first dielectric sub-layer; and
a second dielectric sub-layer on the first dielectric sub-layer.

17. The display device of claim 15 , wherein the dielectric layer comprises at least one selected from titanium oxide, silicon oxide, magnesium oxide, aluminum oxide, yttrium oxide, silicon nitride and aluminum nitride.

18. The display device of claim 1 , wherein the light emitting particles comprise fluorescent material or a quantum dot.

19. The display device of claim 1 , wherein the third metal material is identical to the first metal material, and the fourth metal material is identical to the second metal material.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Dong-Uk
• Lee Baek Hee

Classifications

• G02B5/201 Primary

  in the form of arrays · CPC title