Display device having color conversion and color reinforcement patterns

Patent metadata

Field	Value
Publication number	US-12588332-B2
Application number	US-202218071894-A
Country	US
Kind code	B2
Filing date	Nov 30, 2022
Priority date	Apr 27, 2022
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

A display device includes a color conversion pattern including first red quantum dots, a color reinforcement pattern adjacent to the color conversion pattern and including second red quantum dots, and an emission layer disposed on the color reinforcement pattern. A concentration of the second red quantum dots in the color reinforcement pattern is less than a concentration of the first red quantum dots in the color conversion pattern.

First claim

What is claimed is:

1 . A display device comprising:
a color conversion pattern disposed on a substrate and including first red quantum dots; a color reinforcement pattern disposed on the substrate adjacent to the color conversion pattern and including second red quantum dots, a monomer, and a dispersant; and an emission layer disposed on the color reinforcement pattern, wherein a concentration of the second red quantum dots in the color reinforcement pattern is less than a concentration of the first red quantum dots in the color conversion pattern, and wherein the color reinforcement pattern and the color conversion pattern do not overlap each other in a plan view.

2 . The display device of claim 1 , wherein the concentration of the second red quantum dots in the color reinforcement pattern is in a range of about 1 wt % to about 40 wt %.

3 . The display device of claim 1 , wherein the monomer includes at least one selected from the group consisting of an epoxy-based monomer and an ester-based monomer.

4 . The display device of claim 3 , wherein a terminal of the monomer includes at least one selected from the group consisting of acrylate, diacrylate, and methacrylate.

5 . The display device of claim 3 , wherein a surface energy of the monomer is in a range of about 1 dyne/cm to about 30 dyne/cm.

6 . The display device of claim 3 , wherein a viscosity of the monomer is in a range of about 1 cps to about 40 cps.

7 . The display device of claim 1 , wherein the dispersant includes at least one selected from the group consisting of polyacrylate polymer, polyurethane polymer, and polyethylene polymer.

8 . The display device of claim 1 , wherein the second red quantum dots and the first red quantum dots include a same material.

9 . The display device of claim 1 , wherein a thickness of the color reinforcement pattern in a cross-sectional view is in a range of about 1 um to about 15 um.

10 . The display device of claim 1 , further comprising:
a light absorption filter disposed between the substrate and the color reinforcement pattern and absorbing light in a wavelength band.

11 . The display device of claim 10 , wherein the wavelength band is in a range of about 550 nm to about 620 nm.

12 . The display device of claim 10 , wherein the light absorption filter includes a dipyrromethene-based compound.

13 . The display device of claim 12 , wherein the light absorption filter further includes particles formed of an inorganic material.

14 . The display device of claim 13 , wherein a refractive index of the light absorption filter is less than a refractive index of the color reinforcement pattern.

15 . The display device of claim 10 , wherein a thickness of the light absorption filter in a cross-sectional view is in a range of about 1 um to about 10 um.

16 . The display device of claim 10 , wherein the light absorption filter overlaps the color reinforcement pattern in a plan view.

17 . The display device of claim 16 , wherein a transmittance of light having a wavelength in a range of about 550 nm to about 600 nm in a region where the color reinforcement pattern and the light absorption filter overlap is less than or equal to about 60%.

18 . The display device of claim 17 , wherein a transmittance of light having a wavelength less than about 500 nm or greater than about 650 nm in the region where the color reinforcement pattern and the light absorption filter overlap is greater than or equal to about 80%.

19 . The display device of claim 16 , wherein a reflectivity of light having a wavelength in a range of about 550 nm to about 600 nm in a region where the color reinforcement pattern and the light absorption filter overlap is less than or equal to about 10%.

20 . The display device of claim 10 , further comprising:
a color filter disposed between the substrate and the color conversion pattern, wherein the light absorption filter is disposed on the color filter and overlaps the color conversion pattern and the color reinforcement pattern in a plan view.

21 . The display device of claim 10 , further comprising:
a color filter disposed between the light absorption filter and the color conversion pattern; and a low refractive layer disposed on the color filter, wherein the light absorption filter overlaps the color conversion pattern and the color reinforcement pattern in a plan view.

22 . The display device of claim 21 , further comprising:
an auxiliary light absorption filter disposed between the color reinforcement pattern and the emission layer.

23 . The display device of claim 21 , further comprising:
an auxiliary light absorption filter disposed on the emission layer.

24 . The display device of claim 10 , further comprising:
a color filter disposed between the substrate and the color conversion pattern, wherein the light absorption filter overlaps the color reinforcement pattern in a plan view and does not overlap the color filter in the plan view.

25 . The display device of claim 24 , further comprising:
an auxiliary light absorption filter disposed between the color reinforcement pattern and the emission layer.

26 . The display device of claim 24 , further comprising:
an auxiliary light absorption filter disposed on the emission layer and overlapping the light absorption filter in the plan view; and a metal layer disposed on the emission layer and covering the auxiliary light absorption filter.

27 . A display device comprising:
a light absorption filter disposed on a substrate and absorbing light in a wavelength band; a color conversion pattern disposed on the light absorption filter and including first red quantum dots; a color reinforcement pattern disposed on the light absorption filter adjacent to the color conversion pattern and including second red quantum dots, a monomer, and a dispersant; and an emission layer disposed on the color pattern, wherein a concentration of the second red quantum dots in the color reinforcement pattern is less than a concentration of the first red quantum dots in the color conversion pattern, and wherein the color reinforcement pattern and the color conversion pattern do not overlap each other in a plan view.

28 . The display device of claim 27 , wherein the wavelength band is in a range of about 550 nm to about 650 nm.

29 . The display device of claim 27 , wherein the light absorption filter includes a dipyrromethene-based compound.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Soodong
• Kwon Sunyoung
• Kwon Youngsoo

Classifications

• H10H20/8512

  Wavelength conversion materials · CPC title

• C08F20/26

  Esters containing oxygen in addition to the carboxy oxygen · CPC title

• C08F20/32

  containing epoxy radicals · CPC title

• C08F22/20

  Esters containing oxygen in addition to the carboxy oxygen · CPC title

• H10K2102/331

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