Display device including bonding member

Patent metadata

Field	Value
Publication number	US-11844265-B2
Application number	US-202217872070-A
Country	US
Kind code	B2
Filing date	Jul 25, 2022
Priority date	Feb 19, 2019
Publication date	Dec 12, 2023
Grant date	Dec 12, 2023

Abstract

A display device includes a display panel including a front surface and a second surface which is opposite to the front surface; a front laminated structure attached to the front surface of the display panel; and a rear laminated structure attached to the second surface of the display panel. Each of the front laminated structure and the rear laminated structure includes a bonding member, and an average modulus of the bonding member of the front laminated structure is smaller than an average modulus of the bonding member of the rear laminated structure.

First claim

What is claimed is:

1. A display device comprising:
a display panel including a front surface and a rear surface opposite to each other, the display being configured to be folded by an in-folding method;
a front laminated structure disposed on the front surface of the display panel, the front laminated structure including at least one of a polarizing member, a cover window and a cover window protective layer; and
a rear laminated structure disposed on the rear surface of the display panel, the rear laminated structure including at least one of a polymer film layer, a buffer member and a heat dissipation member,
wherein an average indenter-measured modulus of all of bonding members disposed within the front laminated structure or disposed between the front laminated structure and the display panel, is smaller than an average indenter-measured modulus of all of bonding members disposed within the rear laminated structure or disposed between the rear laminated structure and the display panel.

2. The display device of claim 1 , wherein
the bonding members disposed within the front laminated structure include a window bonding member which is attached to the cover window, and
an indenter-measured modulus of the window bonding member ranges from about 50 kilopascals to about 1 megapascal.

3. The display device of claim 2 , wherein an indenter-measured creep value of the window bonding member ranges from about 30% to about 70%.

4. The display device of claim 2 , wherein
the bonding members disposed within the front laminated structure further include a protective layer bonding member which attaches the cover window protective layer to the cover window, and
the indenter-measured modulus of the window bonding member is greater than an indenter-measured modulus of the protective layer bonding member.

5. The display device of claim 4 , wherein an indenter-measured creep value of the protective layer bonding member ranges from about 30% to about 70%.

6. The display device of claim 4 , wherein
the bonding members disposed within the front laminated structure further include a polarizing member bonding member which attaches the polarizing member to the front surface of the display panel, and
an indenter-measured modulus of the polarizing member bonding member is greater than an indenter-measured modulus of the window bonding member.

7. A display device comprising:
a display panel including a front surface and a rear surface opposite to each other, the display being configured to be folded by an in-folding method;
a front laminated structure disposed on the front surface of the display panel, the front laminated structure including at least one of a polarizing member, a cover window and a cover window protective layer; and
a rear laminated structure disposed on the rear surface of the display panel, the rear laminated structure including at least one of a polymer film layer, a buffer member and a heat dissipation member,
wherein an average indenter-measured modulus of all of bonding members disposed within the rear laminated structure or disposed between the rear laminated structure and the display panel, ranges from about 100 kilopascals to 10 megapascals.

8. The display device of claim 7 , wherein
an average indenter-measured modulus of all of bonding members disposed within the front laminated structure or disposed between the front laminated structure and the display panel, is smaller than the average indenter-measured modulus of all of bonding members disposed within the rear laminated structure or disposed between the rear laminated structure and the display panel.

9. The display device of claim 7 , wherein
the bonding members disposed within the rear laminated structure include a polymer film bonding member which attaches the polymer film layer to the rear surface of the display panel and a heat dissipation member bonding member which attaches the heat dissipation member to the polymer film layer,
the bonding members disposed within the front laminated structure include a window bonding member which is attached to the cover window, and
each of an indenter-measured modulus of the polymer film bonding member and an indenter-measured modulus of the heat dissipation member bonding member, is greater than an indenter-measured modulus of the window bonding member.

10. The display device of claim 9 , wherein
the bonding members disposed within the front laminated structure further include a polarizing member bonding member which attaches the polarizing member to the front surface of the display panel, and
an indenter-measured modulus of the polarizing member bonding member is greater than the indenter-measured modulus of the polymer film bonding member.

11. The display device of claim 10 , wherein an indenter-measured creep value of each of the polymer film bonding member, the heat dissipation member, the window bonding member and the window bonding member ranges from about 30% to about 70%.

12. A display device comprising:
a display panel including a front surface at which an image or a video is displayed and a rear surface opposite to each other, the display being configured to be folded by an in-folding method;
a front laminated structure disposed on the front surface of the display panel, the front laminated structure including a polarizing member and a cover window; and
a rear laminated structure disposed on the rear surface of the display panel, the rear laminated structure including a polymer film layer,
wherein an average indenter-measured modulus of a bonding member between the rear surface of the display panel and the polymer film layer is from about 100 kilopascals to about 10 megapascals and is greater than an average indenter-measured modulus of a bonding member between the cover window and the polarizing member or of a bonding member between the cover window and the front surface of the display panel.

13. The display device of claim 12 , wherein an indenter-measured creep value of the bonding member between the rear surface of the display panel and the polymer film layer ranges from about 30% to about 70%.

14. A display device comprising:
a display panel including a front surface and a rear surface opposite to each other, the display being configured to be folded by an out-folding method;
a front laminated structure disposed on the front surface of the display panel, the front laminated structure including at least one of a polarizing member, a cover window and a cover window protective layer; and
a rear laminated structure disposed on the rear surface of the display panel, the rear laminated structure including at least one of a polymer film layer, a buffer member and a heat dissipation member,
wherein an average indenter-measured modulus of all of bonding members disposed within the rear laminated structure or disposed between the rear laminated structure and the display panel, is smaller than an average indenter-measured modulus of all of bonding members disposed within the rear laminated structure or disposed between the rear laminated structure and the display panel.

15. The display device of claim 14 , wherein
the bonding members disposed within the front laminated structure include a window bonding member which is attached to the cover window, and
an indenter-measured modulus of the window bonding member ranges from about 50 kilopascals to about 1 megapascal.

16. The display device of claim 14 , wherein an indenter-measured creep value of each of bonding members disposed within the front laminated structure and within the rear laminated structure, or dis

Assignees

• Samsung Display Co Ltd

Inventors

• Park Jun Su
• Kim Young Do
• Kim Young Moon
• Rho Kyung Lae
• Park Young Gil
• Seo Ji Hye
• Song Ki Cheol
• Ahn Na Ri
• Lee Jang Doo

Classifications

• H10K59/8794

  Arrangements for heating and cooling · CPC title

• H10K59/8791

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

• H10K59/871

  Self-supporting sealing arrangements · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K77/111 Primary

  Flexible substrates · CPC title