Display device including a bonding member

Patent metadata

Field	Value
Publication number	US-11997810-B2
Application number	US-202016986498-A
Country	US
Kind code	B2
Filing date	Aug 6, 2020
Priority date	Dec 20, 2019
Publication date	May 28, 2024
Grant date	May 28, 2024

Abstract

A display device including: a display panel; a polarizing member overlapping the display panel; a cover window overlapping the polarizing member; and a window bonding member disposed between the polarizing member and the cover window, wherein a penetration depth of the window bonding member that is measured by an indentation tester is equal to or less than approximately 13 μm.

First claim

What is claimed is:

1. A display device, comprising:
a display panel;
a polarizing member overlapping the display panel;
a cover window overlapping the polarizing member;
a window bonding member disposed between the polarizing member and the cover window, and
a light-blocking pattern disposed directly on a surface of the cover window that faces the window bonding member,
wherein the display device comprises a flat area, a first curved area located on a first side of the flat area, and a second curved area located on a second side of the flat area,
wherein the light-blocking pattern is disposed in the first curved area and the second curved area, and
wherein the window bonding member exposes a surface of the polarizing member facing the light blocking pattern in the first and second curved areas and a surface of the light blocking pattern facing the polarizing member in the first and second curved areas such that a space exists directly between the exposed surface of the polarizing member and the exposed surface of the light blocking pattern in each of the first and second curved areas.

2. The display device of claim 1 , wherein a modulus of elasticity of the window bonding member is equal to or greater than approximately 0.61 MPa, and wherein creep properties of the window bonding member are approximately 70%.

3. The display device of claim 2 , wherein the window bonding member is a thin film having a thickness of 0.05 mm to 1 mm, and wherein the modulus of elasticity and the creep properties of the window bonding member are measured from the thin film.

4. The display device of claim 2 , wherein the modulus of elasticity and the creep properties of the window bonding member are measured from the window bonding member separated from the display device by using an indentation tester.

5. The display device of claim 2 , wherein the window bonding member comprises a first portion disposed in the flat area, and second portions disposed in the first curved area and the second curved area, and
wherein a penetration depth of the first portion is smaller than a penetration depth of each of the second portions.

6. The display device of claim 5 , wherein a modulus of elasticity of the first portion is greater than a modulus of elasticity of each of the second portions, and creep properties of the first portion are smaller than creep properties of each of the second portions.

7. The display device of claim 2 , wherein the window bonding member is ultraviolet ray (UV) cured.

8. The display device of claim 7 , wherein the window bonding member is disposed between the polarizing member and the cover window and then UV cured.

9. A display device comprising a flat area, a first curved area located on a first side of the flat area and a second curved area located on a second side of the flat area,
wherein the display device comprises:
a display panel;
a polarizing member overlapping the display panel;
a cover window overlapping the polarizing member;
a window bonding member disposed between the polarizing member and the cover window; and
a light blocking pattern disposed between the window bonding member and the polarizing member,
wherein a thickness of the window bonding member between the light blocking pattern and the polarizing member is less than a thickness of the window bonding member between the cover window and the polarizing member,
wherein a modulus of elasticity of the window bonding member is equal to or greater than approximately 0.61 MPa, and
wherein the window bonding member exposes a surface of the polarizing member facing the light blocking pattern in at least one of the first and second curved areas and a surface of the light blocking pattern facing the polarizing member in at least one of the first and second curved areas such that an empty space exists directly between the exposed surface of the polarizing member and the exposed surface of the light blocking pattern.

10. The display device of claim 9 , wherein the window bonding member comprises a first portion disposed on the flat area, and second portions disposed on the first curved area and the second curved area, and wherein a modulus of elasticity of the first portion is larger than a modulus of elasticity of each of the second portions.

11. The display device of claim 10 , wherein creep properties of the window bonding member are approximately 70%, and creep properties of the first portion is smaller than creep properties of each of the second portions.

12. The display device of claim 11 , wherein a penetration depth of the window bonding member is equal to or less than 13 μm, and wherein a penetration depth of the first portion is smaller than a penetration depth of each of the second portions.

13. The display device of claim 12 , wherein the window bonding member is a thin film having a thickness of 0.05 mm to 1 mm, and wherein the modulus of elasticity of the window bonding member and the creep properties of the window bonding member are measured from the thin film.

14. The display device of claim 12 , wherein the modulus of elasticity of the window bonding member and the creep properties of the window bonding member are measured from the window bonding member separated from the display device.

15. A display device comprising a flat area, a first curved area located on a first side of the flat area and a second curved area located on a second side of the flat area,
wherein the display device comprises:
a display panel;
a polarizing member disposed on the display panel;
a cover window disposed on the polarizing member;
a window bonding member disposed between the polarizing member and the cover window; and
a light blocking pattern disposed on the cover window,
wherein the window bonding member comprises a first portion disposed on the flat area and second portions disposed on the first curved area and the second curved area,
wherein a modulus of elasticity of the first portion is equal to or greater than approximately 0.61 MPa and a modulus of elasticity of each of the second portions is equal to or greater than approximately 0.61 MPa, and
wherein the window bonding member exposes a surface of the polarizing member facing the light blocking pattern in the first and second curved areas and a surface of the light blocking pattern facing the polarizing member in the first and second curved areas such that an empty space exists directly between the exposed surface of the polarizing member and the exposed surface of the light blocking pattern in each of the first and second curved areas.

16. The display device of claim 15 , wherein creep properties of the first portion are approximately 70% and creep deformation characteristics of each of the second portions are approximately 70%, and wherein the creep properties of the first portion are smaller than the creep properties of each of the second portions.

17. The display device of claim 16 , wherein a penetration depth of the first portion is equal to or less than approximately 13 μm and a penetration depth of each of the second portions is equal to or less than approximately 13 μm, wherein the penetration depths of the first portion and the second portions are measured by an indentation tester, and the penetration depth of the first portion is smaller than the penetration depth of each of the second portions.

Assignees

• Samsung Display Co Ltd

Inventors

• Park Jun Su
• Kwon Gi Suk
• Park Young Gil
• Ahn Na Ri

Classifications

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/8722

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

• H10K59/871

  Self-supporting sealing arrangements · CPC title

• H10K59/80

  Constructional details · CPC title

• H05K5/03 Primary

  Covers · CPC title