Electronic apparatus

Patent metadata

Field	Value
Publication number	US-12306380-B2
Application number	US-202318327632-A
Country	US
Kind code	B2
Filing date	Jun 1, 2023
Priority date	May 9, 2019
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

An electronic apparatus includes an electronic panel foldable together with a window; and a first functional layer and a second functional layer each foldable together with the window and the electronic panel. The second functional layer is disposed farther from the window than the first functional layer, and has a thickness in a range from about micrometers to about 50 micrometers and a modulus in a range from about 3 gigapascals to about 8 gigapascals, and the first functional layer is disposed closer to the window than the second functional layer, and has both a thickness equal to or greater than that of the second functional layer, and a modulus less than that of the second functional layer.

First claim

What is claimed is:

1. An electronic apparatus comprising:
a display panel which provides an image and is foldable with respect to a folding axis;
a first cover layer which is foldable together with the display panel with respect to the folding axis and disposed on the display panel;
a second cover layer which is foldable together with the display panel with respect to the folding axis and disposed below the display panel;
a plurality of functional layers between the display panel and the first cover layer, the plurality of functional layers foldable together with the each other and with the first cover layer and the display panel;
the plurality of functional layers comprising:
a first functional layer which includes any one of polyurethane, silicone, polyether block amide, and copolyester elastomers, and
a second functional layer which is disposed farther from the first cover layer than the first functional layer; and

adhesive layers which respectively couple the first cover layer to the first functional layer, the second functional layer to the first functional layer, the second functional layer to the display panel and the display panel to the second cover layer,
wherein
the second functional layer which is disposed farther from the first cover layer than the first functional layer, has a thickness in a range from 30 micrometers to 50 micrometers together with a modulus in a range from 3 gigapascals 8 gigapascals, and
the first functional layer has a thickness equal to or greater than the thickness of the second functional layer together with having a modulus less than that of the se and functional layer.

2. The electronic apparatus of claim 1 , wherein
the thickness of the first functional layer is in a range from 50 micrometers to 100 micrometers, and
a modulus of the first functional layer is variable according to temperature.

3. The electronic apparatus of claim 2 , wherein the modulus of the first functional layer is about 200 megapascals to 1500 megapascale at room temperature.

4. The electronic apparatus of claim 1 , wherein
the thickness of the first functional layer is in a range from 50 micrometers to 75 micrometers,
a modulus of the first functional layer is 1000 megapascals to 1800 at a temperature of about −20° C.

5. The electronic apparatus of claim 2 , wherein
the thickness of the first functional layer is in a range from 75 micrometers to 100 micrometers, and
the modulus of the first functional layer is in a range from 1000 megapascals to 1800 megapascals at a temperature of about −20° C.

6. The electronic apparatus of claim 2 , wherein
the thickness of the first functional layer is in a range from 50 micrometers to 75 micrometers, and
the modulus of the first functional layer is 100 megapascals to 800 megapascals at a temperature of about 80° C.

7. The electronic apparatus of claim 2 , wherein
the thickness of the first functional layer is in a range from 75 micrometers to 100 micrometers, and
the modulus of the first functional layer is 150 megapascals to 800 megapascals at a temperature of about 80° C.

8. The electronic apparatus of claim 1 , wherein each of the first functional layer and the second functional layer is optically clear.

9. The electronic apparatus of claim 1 , wherein the first cover layer comprises glass.

10. The electronic apparatus of claim 9 , wherein the first cover layer further comprises a coating layer on a top surface of the first cover layer.

11. An electronic apparatus comprising:
an electronic panel which provides an image and is bendable with respect to an axis extending in one direction;
a window which is bendable together with the electronic panel;
a plurality of functional layers between the electronic panel and the window, the plurality of functional layers foldable together with the each other and with the window and the electronic panel; and
the plurality of functional layers comprising:
a first functional layer which includes any one of poly ethane, silicone, polyether block amide, and copolyester elastomers, and
a second functional layer which is disposed farther from the window than the first functional layer;

wherein
the first functional layer has a thickness equal to or greater than a thickness of the second functional layer together with a modulus less than a modulus of the second functional layer.

12. The electronic apparatus of claim 11 , wherein
the thickness of the second functional layer is in a range from 30 micrometers to 50 micrometers, and
the modulus of the second functional layer is in a range from 3 gigapascals to 8 gigapascals.

13. The electronic apparatus of claim 12 , wherein the thickness of the first functional layer is in a range from 50 micrometers to 100 micrometers.

14. The electronic apparatus of claim 11 , wherein the thickness of the first functional layer is in a range from 50 micrometers to 75 micrometers.

15. The electronic apparatus of claim 14 , wherein the modulus of the first functional layer is 100 megapascals to 800 megapascals at the temperature of about 80° C.

16. The electronic apparatus of claim 13 , wherein the thickness of the first functional layer is in a range from 75 micrometers to 100 micrometers.

17. The electronic apparatus of claim 16 , wherein the modulus of the first functional layer is 150 megapascals to 800 megapascals at the temperature of about 80° C.

18. The electronic apparatus of claim 11 , further comprising adhesive layers which respectively couple the window to the first functional layer, and the second functional layer to the first functional layer.

19. The electronic apparatus of claim 11 , wherein the window comprises glass.

20. The electronic apparatus of claim 11 , wherein
the first functional layer has a modulus in a range of 1000 megapascals to 1800 megapascals at a temperature of about −20° C., and
the first functional layer has a modulus in a range of 200 megapascals to 1000 megapascals at room temperature.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Jeoungsub
• Shin Heonjung
• Oh Hyun Joon
• Yoon Daeho

Classifications

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/873

  Encapsulations · CPC title

• H04M1/0268

  including a flexible display panel · CPC title

• G09F9/301 Primary

  flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED · CPC title

• G06F2203/04102

  Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper · CPC title