Resin composition, adhesive member, and display device including the same

Patent metadata

Field	Value
Publication number	US-12252569-B2
Application number	US-202017124409-A
Country	US
Kind code	B2
Filing date	Dec 16, 2020
Priority date	Jan 14, 2020
Publication date	Mar 18, 2025
Grant date	Mar 18, 2025

Abstract

A resin composition for a display device includes: a (meth)acrylic monomer having at least one (meth)acryloyl group; a urethane acrylate oligomer having a weight average molecular weight of about 27,000 to about 50,000; and at least one photoinitiator.

First claim

What is claimed is:

1. An adhesive member for a display device, the adhesive member comprising a polymer made from a resin composition, the resin composition comprising:
a (meth)acrylic monomer comprising at least one (meth)acryloyl group;
a urethane acrylate oligomer having a weight average molecular weight of about 27,000 to about 50,000; and
a photoinitiator,
wherein the photoinitiator is 1-hydroxycyclohexyl-phenyl ketone,
wherein the (meth)acrylic monomer comprises at least one of (2-methyl-2-ethyl-1,3-dioxolan-4-yl)methyl acrylate, 4-acryloyl morpholine, and octyl (meth)acrylate, and wherein the adhesive member has a storage elastic modulus of about 0.3×10 6− Pa to about 1.0×10 6− Pa at 25° C.

2. The adhesive member of claim 1 , wherein the resin composition has a viscosity of about 1.0 mPa·s to about 50 mPa·s at about 25° C. as measured by JIS K7117-2 method.

3. The adhesive member of claim 1 , wherein the adhesive member has a 180° peeling strength of about 15 N/inch or more, with respect to a glass substrate.

4. A display device comprising:
a display module including a display panel;
a window disposed on the display panel; and
an adhesive disposed between the display panel and the window,
wherein the adhesive comprises a polymer made from a resin composition, the resin composition comprising a (meth)acrylic monomer including at least one (meth)acryloyl group, a urethane acrylate oligomer having a weight average molecular weight of about 27,000 to about 50,000, and a photoinitiator, wherein the photoinitiator is 1-hydroxycyclohexyl-phenyl ketone,
wherein the (meth)acrylic monomer comprises at least one of (2-methyl-2-ethyl-1,3-dioxolan-4-yl)methyl acrylate, 4-acryloyl morpholine, and octyl (meth)acrylate, and
wherein the adhesive member has a storage elastic modulus of about 0.3×10 6 Pa to about 1.0×10 6 Pa at 25° C.

5. The display device of claim 4 , wherein the adhesive comprises an adhesive member having a thickness of about 50 μm to about 200 μm.

6. The display device of claim 4 , further comprising an input sensor disposed on the display panel, wherein the adhesive is disposed between the display panel and the input sensor or between the input sensor and the window.

7. The display device of claim 6 , wherein the display panel comprises a display element layer and an encapsulation layer disposed on the display element layer, the input sensor comprising an input sensing unit directly disposed on the encapsulation layer, and the adhesive is disposed on the input sensing unit.

8. The display device of claim 4 , wherein the adhesive directly provides the resin composition on one surface of the window or one surface of the display module, and is formed by UV curing the provided resin composition.

9. The display device of claim 4 , further comprising at least one foldable area having a radius of curvature of about 5 mm or less.

10. The display device of claim 4 , further comprising a light control layer disposed between the adhesive and the window and an optical adhesive layer disposed between the light control layer and the window, wherein the optical adhesive layer comprises a polymer made from the resin composition.

11. The display device of claim 10 , wherein the light control layer is a polarization plate or a color filter layer.

12. The display device of claim 10 , wherein the optical adhesive layer has a storage elastic modulus of about 0.3×10 6 Pa to about 1.0×10 6 Pa at 25° C., and a 180° peeling strength of about 15 N/inch or more with respect to a glass substrate.

13. The display device of claim 10 , further comprising an input sensor disposed between the adhesive and the light control layer and an interlayer adhesive layer disposed between the input sensor and the light control layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Morita Keisuke

Classifications

• C08F290/067 Primary

  Polyurethanes; Polyureas · CPC title

• C08F224/00

  Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a heterocyclic ring containing oxygen (cyclic esters of polyfunctional acids C08F218/00; cyclic anhydrides of unsaturated acids C08F220/00, C08F222/00) · CPC title

• C09J2203/326

  for bonding electronic components such as wafers, chips or semiconductors · CPC title

• C09J2203/318

  for the production of liquid crystal displays · CPC title

• C09J4/00

  Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16} · CPC title