Display apparatus including quantum dot

Patent metadata

Field	Value
Publication number	US-12069927-B2
Application number	US-202117462499-A
Country	US
Kind code	B2
Filing date	Aug 31, 2021
Priority date	Nov 25, 2020
Publication date	Aug 20, 2024
Grant date	Aug 20, 2024

Abstract

A display apparatus includes a first pixel, a second pixel, and a third pixel that emit light of different colors, a first quantum conversion layer arranged corresponding to an emission area of the first pixel and including first quantum dots and first metal nanoparticles, and a second quantum conversion layer arranged corresponding to an emission area of the second pixel and including second quantum dots and second metal nanoparticles, where the plurality of first quantum dots has an average size different from an average size of the second quantum dots, and the first metal nanoparticles have an average size identical to an average size of the plurality of second metal nanoparticles, and outer shapes of the first metal nanoparticles and the second metal nanoparticles have sharper corners than virtual outer spherical shapes.

First claim

What is claimed is:

1. A display apparatus comprising:
a first pixel, a second pixel, and a third pixel which emit light of different colors;
a first quantum conversion layer arranged corresponding to an emission area of the first pixel and comprising a plurality of first quantum dots and a plurality of first metal nanoparticles; and
a second quantum conversion layer arranged corresponding to an emission area of the second pixel and comprising a plurality of second quantum dots and a plurality of second metal nanoparticles,
wherein the plurality of first quantum dots has an average size different from an average size of the plurality of second quantum dots, and
the plurality of first metal nanoparticles has an average size identical to an average size of the plurality of second metal nanoparticles, and outer shapes of the plurality of first metal nanoparticles and the plurality of second metal nanoparticles have sharper corners than virtual outer spherical shapes.

2. The display apparatus of claim 1 , further comprising:
a first color filter arranged corresponding to the first pixel;
a second color filter arranged corresponding to the second pixel; and
a third color filter arranged corresponding to the third pixel, wherein the first, second, and third color filters emit light of different colors.

3. The display apparatus of claim 1 , further comprising:
a substrate; and
an opposite substrate arranged corresponding to the substrate and comprising a polarization layer.

4. The display apparatus of claim 1 , further comprising:
a thin film encapsulation layer covering the first pixel, the second pixel, and the third pixel and comprising at least one inorganic encapsulation layer and at least one organic encapsulation layer; and
a touch screen layer arranged on a surface of the thin film encapsulation layer facing the first and second quantum conversion layers.

5. The display apparatus of claim 1 , wherein the first pixel displays a color of a longer wavelength than a color of the second pixel, and
the average size of the plurality of first quantum dots is greater than the average size of the plurality of second quantum dots.

6. The display apparatus of claim 1 , wherein the plurality of first metal nanoparticles and the plurality of second metal nanoparticles have polygonal shapes with rounded corners.

7. The display apparatus of claim 1 , wherein the plurality of first metal nanoparticles and the plurality of second metal nanoparticles each have a star, a crescent moon, a nanorod, a hollow nanocage, or an oval shape.

8. The display apparatus of claim 1 , wherein the plurality of first metal nanoparticles and the plurality of first quantum dots are arranged apart from each other, and
the plurality of second metal nanoparticles and the plurality of second quantum dots are arranged apart from each other.

9. The display apparatus of claim 1 , wherein graft molecules are further arranged on surfaces of the plurality of first metal nanoparticles and the plurality of second metal nanoparticles.

10. The display apparatus of claim 1 , wherein the plurality of first metal nanoparticles and the plurality of second metal nanoparticles each comprise at least one of Au, Ag, Al, Al 2 O 3 , Co, Cu, Cr, Pt, Ni, Fe, Mo, and W.

11. The display apparatus of claim 1 , further comprising a third quantum conversion layer arranged corresponding to the third pixel and comprising a plurality of third quantum dots and a plurality of third metal nanoparticles,
wherein an average size of the plurality of third quantum dots is different from the average size of the plurality of first quantum dots and the average size of the plurality of second quantum dots, and
an average size of the plurality of third metal nanoparticles is identical to the average size of the plurality of first metal nanoparticles and the average size of the plurality of second metal nanoparticles.

12. The display apparatus of claim 1 , wherein the first pixel, the second pixel, and the third pixel each comprise an organic light-emitting diode.

13. The display apparatus of claim 12 , wherein the organic light-emitting diodes of the first, second, and third pixels emit blue light.

14. A display apparatus comprising:
a first pixel, a second pixel, and a third pixel arranged on a substrate and respectively comprising organic light-emitting diodes which emit a same color light;
a thin film encapsulation layer covering the organic light-emitting diodes; and
a first quantum conversion layer, a second quantum conversion layer and a transmission window arranged on the thin film encapsulation layer, the first quantum conversion layer corresponding to the first pixel, the second quantum conversion layer corresponding to the second pixel, and the transmission window corresponding to the third pixel,
wherein the first quantum conversion layer comprises a plurality of first quantum dots and a plurality of first metal nanoparticles,
the second quantum conversion layer comprises a plurality of second quantum dots having an average size different from an average size of the plurality of first quantum dots, and a plurality of second metal nanoparticles having an average size identical to an average size of the plurality of first metal nanoparticles within an error range, and
outer shapes of the plurality of first metal nanoparticles and the plurality of second metal nanoparticles have sharper corners than virtual outer spherical shapes.

15. The display apparatus of claim 14 , wherein the organic light-emitting diodes of the first, second, and third pixels emit the blue light.

16. The display apparatus of claim 14 , wherein the thin film encapsulation layer comprises at least one inorganic encapsulation layer and at least one organic encapsulation layer.

17. The display apparatus of claim 14 , wherein the plurality of first metal nanoparticles and the plurality of second metal nanoparticles comprise silver (Ag) and have triangular shapes.

18. The display apparatus of claim 14 , wherein the transmission window comprises scattered particles.

19. The display apparatus of claim 14 , further comprising:
a touch conductive layer arranged on a surface of the thin film encapsulation layer facing the first and second quantum conversion layers.

20. The display apparatus of claim 14 , further comprising:
a first color filter arranged corresponding to the first quantum conversion layer;
a second color filter arranged corresponding to the second quantum conversion layer; and
a third color filter arranged corresponding to the transmission window.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Minsu

Classifications

• H10K59/8791

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• H10K59/8731

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10K59/8722

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

• H10K2102/331

  Nanoparticles used in non-emissive layers, e.g. in packaging layer · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title