Display Apparatus

Patent metadata

Field	Value
Publication number	US-2025275416-A1
Application number	US-202519060993-A
Country	US
Kind code	A1
Filing date	Feb 24, 2025
Priority date	Feb 26, 2024
Publication date	Aug 28, 2025
Grant date	—

Abstract

A display apparatus according to one embodiment of the present disclosure may include a display panel, a cover layer on the display panel, and a bonding layer including a main bonding layer on the cover layer and a nitrogen reactive bonding layer on the main bonding layer, wherein a content of nitrogen atom of the nitrogen reactive bonding layer may be greater than a content of nitrogen atoms of the main bonding layer.

First claim

What is claimed is:

1 . A display apparatus comprising:
a display panel; a main bonding layer on the display panel; a cover layer on the main bonding layer; and a nitrogen reactive bonding layer on the cover layer, wherein a content of nitrogen atoms of the nitrogen reactive bonding layer is greater than a content of nitrogen atoms of the main bonding layer.

2 . The display apparatus of claim 1 , wherein the nitrogen reactive bonding layer comprises at least one bond between the nitrogen atoms, and wherein the nitrogen reactive bonding layer comprises at least one of an azo compound, a diazo compound, and a pyrrole and imidazole compound.

3 . The display apparatus of claim 2 , wherein the nitrogen reactive bonding layer comprises the azo compound or the diazo compound, and wherein a weight ratio of the azo compound or the diazo compound is 2 wt % or less.

4 . The display apparatus of claim 2 , wherein the nitrogen reactive bonding layer is an ultraviolet reactive bonding layer.

5 . The display apparatus of claim 4 , further comprising a polarization layer between the display panel and the main bonding layer.

6 . The display apparatus of claim 5 , wherein adhesive strength between the main bonding layer and the polarization layer is 0.8 kgf/inch or more.

7 . The display apparatus of claim 6 , wherein the adhesive strength between the main bonding layer and the polarization layer is less than 0.5 kgf/inch according to the reaction of the nitrogen reactive bonding layer with the ultraviolet rays.

8 . The display apparatus of claim 4 , wherein a wavelength range of the ultraviolet rays ranges from 320 nm to 400 nm.

9 . The display apparatus of claim 8 , wherein the ultraviolet rays are radiated at an energy density less than 5000 mJ/cm 2 .

10 . The display apparatus of claim 2 , wherein the nitrogen reactive bonding layer comprises the pyrrole and imidazole compound, and wherein a weight ratio of the pyrrole and imidazole compound is 5 wt % or less.

11 . A display apparatus comprising:
a display panel; a cover layer on the display panel; and a bonding layer comprising a main bonding layer on the cover layer and a nitrogen reactive bonding layer on the main bonding layer, wherein a content of nitrogen atoms of the nitrogen reactive bonding layer is greater than a content of nitrogen atoms of the main bonding layer.

12 . The display apparatus of claim 11 , wherein the nitrogen reactive bonding layer comprises at least one bond between nitrogen atoms.

13 . The display apparatus of claim 12 , wherein the nitrogen reactive bonding layer comprises at least one of an azo compound, a diazo compound, and a pyrrole and imidazole compound.

14 . The display apparatus of claim 13 , wherein the nitrogen reactive bonding layer is an ultraviolet reactive bonding layer.

15 . The display apparatus of claim 14 , wherein adhesive strength between the main bonding layer and the cover layer ranges from 1.0 kgf/inch to 4.0 kgf/inch.

16 . The display apparatus of claim 15 , wherein the adhesive strength between the main bonding layer and the cover layer is less than 0.3 kgf/inch according to the reaction of the nitrogen reactive bonding layer with the ultraviolet rays.

17 . A display apparatus comprising:
a display panel; a first stretchable board on the display panel; a main bonding layer on the first stretchable board; a second stretchable board on the main bonding layer; and a nitrogen reactive bonding layer on the second stretchable board, wherein a content of nitrogen atoms of the nitrogen reactive bonding layer is greater than a content of nitrogen atoms of the main bonding layer.

18 . The display apparatus of claim 17 , wherein the nitrogen reactive bonding layer comprises at least one bond between nitrogen atoms,
the nitrogen reactive bonding layer comprises at least one of an azo compound, a diazo compound, and a pyrrole and imidazole, and wherein the nitrogen reactive bonding layer is an ultraviolet reactive bonding layer.

19 . The display apparatus of claim 18 , wherein adhesive strength between the main bonding layer and the first stretchable board ranges from 1.0 kgf/inch to 3.0 kgf/inch, and adhesive strength between the main bonding layer and the first stretchable board is less than 0.3 kgf/inch according to the reaction of the nitrogen reactive bonding layer with the ultraviolet rays.

20 . The display apparatus of claim 17 , wherein a thickness of the second stretchable board ranges from 5 μm to 500 μm, and wherein a free volume fraction of the second stretchable board is 50 or more.

Assignees

• Lg Display Co Ltd

Inventors

• Kim Giyoun
• Lee Jungwoo
• Park Jaehyoung

Classifications

• H10K59/8791

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title

• H10K71/80

  using temporary substrates · CPC title

• H10K59/121 Primary

  characterised by the geometry or disposition of pixel elements · CPC title

• H10K59/8793

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

• H10K59/1315

  comprising structures specially adapted for lowering the resistance · CPC title