Ink composition and display apparatus including layer containing the ink composition

Patent metadata

Field	Value
Publication number	US-12473440-B2
Application number	US-202217745894-A
Country	US
Kind code	B2
Filing date	May 17, 2022
Priority date	Sep 30, 2021
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

An ink composition and a display apparatus including a layer and that is formed using the ink composition. The ink composition includes a scatterer, a monomer, and a dispersant. The layer formed using the ink composition has a refractive index of about 1.1 to about 1.5. A lateral luminance of the display apparatus is improved as a result thereof.

First claim

What is claimed is:

1 . An ink composition comprising:
a scatterer, a monomer, and a dispersant, wherein a layer formed using the ink composition has a refractive index of about 1.1 to about 1.5, and the dispersant comprises a polyacrylate-based compound containing a Si moiety, a polyurethane-based compound containing a Si moiety, a polyethylene-based compound containing a Si moiety, or any combination thereof.

2 . The ink composition of claim 1 , wherein the polyacrylate-based compound containing a Si moiety, the polyurethane-based compound containing a Si moiety, or the polyethylene-based compound containing a Si moiety comprises a carboxyl group and/or an amine group.

3 . The ink composition of claim 1 , wherein the monomer is an acrylate-based monomer that includes a Si moiety, the monomer complying with Formula 1 below:

wherein, R 1 and R 2 are each independently be hydrogen, deuterium, a C 1 -C 60 alkyl group unsubstituted or substituted with at least one R 10a , a C 2 -C 60 alkenyl group unsubstituted or substituted with at least one R 10a , a C 2 -C 60 alkynyl group unsubstituted or substituted with at least one R 10a , a C 1 -C 60 alkoxy group unsubstituted or substituted with at least one R 10a , a C 3 -C 60 carbocyclic group unsubstituted or substituted with at least one R 10a , or a C 1 -C 60 heterocyclic group unsubstituted or substituted with at least one R 10a .

4 . The ink composition of claim 1 , wherein a vapor pressure of the ink composition is from about 10 −6 mmHg to about 10 −3 mmHg.

5 . The ink composition of claim 1 , wherein a surface energy of the ink composition is from about 1 dyne/cm to about 20 dyne/cm.

6 . The ink composition of claim 1 , wherein a viscosity of the ink composition is from about 1 cps to about 40 cps.

7 . The ink composition of claim 1 , wherein the ink composition does not contain a solvent.

8 . The ink composition of claim 1 , wherein the scatterer comprises a metal oxide, a non-metal oxide, or any combination thereof.

9 . The ink composition of claim 1 , wherein the scatterer comprises an oxide of titanium, silver, aluminum, or any combination thereof.

10 . The ink composition of claim 1 , wherein the ink composition further comprises particles having a refractive index of about 1.1 to about 1.5.

11 . The ink composition of claim 10 , wherein the particles comprise SiO 2 particles, MgF 2 particles, or any combination thereof.

12 . The ink composition of claim 1 , further comprising:
particles having a refractive index of about 1.1 to about 1.5; and a compound having a carboxyl group and/or an amine group, wherein the scatterer and/or the particles are surface-treated with a compound having a carboxyl group and/or an amine group.

13 . A display apparatus comprising:
a first substrate on which a plurality of light-emitting devices are located; a plurality of light control members corresponding to the plurality of light-emitting devices disposed on the first substrate; and a plurality of banks arranged between the plurality of light control members, wherein at least one of the light control members includes a layer formed using an ink composition that includes a scatterer, a monomer, and a dispersant, the layer has a refractive index of about 1.1 to about 1.5, and the dispersant comprises a polyacrylate-based compound containing a Si moiety a polyurethane-based compound containing a Si moiety, a polyethylene-based compound containing a Si moiety, or any combination thereof.

14 . The display apparatus of claim 13 , wherein the light control members comprise a color filter layer, a quantum dot layer, a scattering layer, or any combination thereof.

15 . The display apparatus of claim 13 , further comprising:
a low-refractive-index layer having a refractive index about 1.1 to about 1.5, wherein the low-refractive-index layer and the layer formed using the ink composition are adjacent to each other.

16 . The display apparatus of claim 13 , further comprising an inorganic capping layer.

17 . The display apparatus of claim 13 , further comprising:
a low-refractive-index layer having a refractive index of about 1.1 to about 1.5; and an inorganic capping layer, wherein the inorganic capping layer is in direct contact with the low-refractive-index layer, and the inorganic capping layer is in direct contact with the layer formed using the ink composition.

18 . The display apparatus of claim 13 , wherein the ink composition further comprises a compound having a carboxyl group and/or an amine group, and
a surface of the scatterer is surface-treated with the compound having a carboxyl group and/or an amine group, and adsorbed onto a surface of at least one of the banks.

19 . The display apparatus of claim 13 , wherein the ink composition further includes:
a compound having a carboxyl group and/or an amine group; and particles having a refractive index of about 1.1 to about 1.5, and the scatterer and/or the particles are surface-treated with the compound having a carboxyl group and/or an amine group, and adsorbed onto a surface of at least one of the banks.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Soodong
• Kim Minseok
• Kim Sujin

Classifications

• H10K59/38

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

• G02F1/133606

  including a specially adapted diffusing, scattering or light controlling members · CPC title

• C09K11/70

  containing phosphorus · CPC title

• C09K11/565

  with zinc cadmium · CPC title

• C09K11/06

  containing organic luminescent materials · CPC title