Display device

Patent metadata

Field	Value
Publication number	US-2024244926-A1
Application number	US-202318382300-A
Country	US
Kind code	A1
Filing date	Oct 20, 2023
Priority date	Jan 18, 2023
Publication date	Jul 18, 2024
Grant date	—

Abstract

A display device includes: a display panel including a display area, in which a plurality of pixels are arranged, and a peripheral area adjacent to the display area, a polarizing member disposed on the display panel, a cover window disposed on the polarizing member, and an adhesive layer attaching the polarizing member and the cover window, where the adhesive layer has a stress relaxation rate in a range of about 0.36 to about 0.45.

First claim

What is claimed is:

1 . A display device comprising:
a display panel including a display area, in which a plurality of pixels are arranged, and a peripheral area adjacent to the display area; a polarizing member disposed on the display panel; a cover window disposed on the polarizing member; and an adhesive layer attaching the polarizing member and the cover window to each other, wherein the adhesive layer has a stress relaxation rate in a range of about 0.36 to about 0.45.

2 . The display device of claim 1 , wherein the adhesive layer has a creep value in a range of about 6% to about 7%.

3 . The display device of claim 1 , wherein the adhesive layer includes a monomer, an oligomer, a photo initiator, a crosslinking agent, and a molecular weight control agent.

4 . The display device of claim 3 , wherein the crosslinking agent include a first crosslinking agent having three functional groups and a second crosslinking agent having four functional groups.

5 . The display device of claim 4 , wherein each of the first crosslinking agent and the second crosslinking agent has an acrylate functional group.

6 . The display device of claim 4 , wherein
the first crosslinking agent includes pentaerythritol triacrylate, and the second crosslinking agent includes pentaerythritol tetraacrylate.

7 . The display device of claim 6 , wherein
a content of the first crosslinking agent is in a range of about 0.1 wt % to about 0.3 wt % based on a total content of the adhesive layer, and a content of the second crosslinking agent is in a range of about 0.1 wt % to about 0.2 wt % based on the total content of the adhesive layer.

8 . The display device of claim 3 , wherein the oligomer includes 2-hydroxyethylhexyl acrylate.

9 . The display device of claim 3 , wherein the monomer includes at least one selected from 2-hydroxyethyl acrylate, butyl acrylate, isooctyl acrylate, and isobornyl acrylate.

10 . The display device of claim 1 , wherein the adhesive layer has a modulus in a range of 0.15 Mpa to about 0.3 Mpa at a room temperature.

11 . The display device of claim 1 , wherein the adhesive layer includes an optically clear adhesive.

12 . The display device of claim 1 , further comprising:
a light blocking layer disposed on a lower surface of the cover window and overlapping a part of the peripheral area.

13 . A display device comprising:
a display panel including a display area, in which a plurality of pixels are arranged, and a peripheral area adjacent to the display area; a polarizing member disposed on the display panel; a cover window disposed on the polarizing member; and an adhesive layer attaching the polarizing member and the cover window, wherein the adhesive layer has a stress relaxation rate in a range of about 0.36 to about 0.45, a creep value of about 6% to about 7%, and a modulus in a range of about 0.15 Mpa to about 0.3 Mpa at a room temperature.

14 . The display device of claim 13 , wherein the adhesive layer includes a monomer, an oligomer, a photo initiator, a crosslinking agent, and a molecular weight control agent.

15 . The display device of claim 14 , wherein the crosslinking agent include a first crosslinking agent having three functional groups and a second crosslinking agent having four functional groups.

16 . The display device of claim 15 , wherein each of the first crosslinking agent and the second crosslinking agent has an acrylate functional group.

17 . The display device of claim 15 , wherein
the first crosslinking agent includes pentaerythritol triacrylate, and the second crosslinking agent includes pentaerythritol tetraacrylate.

18 . The display device of claim 17 , wherein
a content of the first crosslinking agent is in a range of about 0.1 wt % to about 0.3 wt %, based on a total content of the adhesive layer and a content of the second crosslinking agent is in a range of about 0.1 wt % to about 0.2 wt % based on the total content of the adhesive layer.

19 . The display device of claim 13 , wherein the adhesive layer includes an optically clear adhesive.

20 . The display device of claim 13 , further comprising:
a light blocking layer disposed on a lower surface of the cover window and overlapping a part of the peripheral area.

Assignees

• Samsung Display Co Ltd

Inventors

• Eun Sangwon
• Park Youngju
• Yoo Seongsoo
• Lee Joosub
• Lee Jinyoung

Classifications

• H10K59/8722 Primary

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

• H10K59/8793

  Arrangements for polarized light emission (H10K59/8791 takes precedence) · CPC title

• H10K59/124 Primary

  Insulating layers formed between TFT elements and OLED elements · CPC title

• C08F285/00

  Macromolecular compounds obtained by polymerising monomers on to preformed graft polymers · 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