Flexible display device

Patent metadata

Field	Value
Publication number	US-12364124-B2
Application number	US-202418610751-A
Country	US
Kind code	B2
Filing date	Mar 20, 2024
Priority date	Dec 27, 2019
Publication date	Jul 15, 2025
Grant date	Jul 15, 2025

Abstract

A flexible display device may include a cover glass, a light shielding pattern on a lower surface of the cover glass, a display panel under the cover glass and including a display area and a bending area, a plurality of touch sensors disposed at a position corresponding to the display area of the display panel below the cover glass, an adhesive layer between the cover glass and the display panel, a micro coating layer on an upper surface of the display panel in the bending area, a first back plate on a rear surface of the display panel in the display area, and a second back plate.

First claim

What is claimed is:

1. A flexible display device, comprising:
a cover glass;
a light shielding pattern on a lower surface of the cover glass;
a display panel under the cover glass and including a display area and a bending area;
a plurality of touch sensors disposed at a position corresponding to the display area of the display panel below the cover glass;
an adhesive layer between the cover glass and the display panel;
a micro coating layer on an upper surface of the display panel in the bending area;
a first back plate on a rear surface of the display panel in the display area; and
a second back plate.

2. The flexible display device of claim 1 , further comprising a polarizing plate between the adhesive layer and the display panel.

3. The flexible display device of claim 2 , wherein the polarizing plate overlaps the light shielding pattern.

4. The flexible display device of claim 2 , further comprising a cushion tape on a rear surface of the first back plate.

5. The flexible display device of claim 4 , further comprising a fixing tape between the cushion tape and the second back plate.

6. The flexible display device of claim 5 , wherein:
the display panel further includes a first non-display area between the display area and the bending area; and
the fixing tape includes:
a first fixing tape attached to a rear surface of the cushion tape in the first non-display area; and
a second fixing tape attached to the rear surface of the cushion tape in the bending area.

7. The flexible display device of claim 5 , wherein the fixing tape overlaps the light shielding pattern.

8. The flexible display device of claim 5 , wherein the fixing tape includes an adhesive layer contacting a rear surface of the cushion tape and the second back plate.

9. The flexible display device of claim 8 , wherein a lateral end portion of the cushion tape does not coincide with a lateral end portion of the fixing tape and extends farther than the laternal end portion of the fixing tape, and
wherein a lateral end portion of the second back plate does not coincide with the lateral end portion of the fixing tape and extends farther than the lateral end portion of the fixing tape.

10. The flexible display device of claim 1 , further comprising a driving IC,
wherein the display panel further includes a second non-display area extending from the bending area, and the driving IC is mounted on the upper surface of the display panel in the second non-display area.

11. The flexible display device of claim 10 , wherein the driving IC overlaps the light shielding pattern.

12. The flexible display device of claim 1 , further comprising:
a thin film transistor in the display panel in the display area; and
a planarization layer over the thin film transistor.

13. The flexible display device of claim 12 , further comprising an intermediate electrode on a first planarization layer of the planarization layer and electrically connected to the thin film transistor.

14. The flexible display device of claim 13 , further comprising a light emitting element over a second planarization layer of the planarization layer and electrically connected to the intermediate electrode.

15. The flexible display device of claim 14 , wherein the light emitting element includes an anode, a light emitting unit, and a cathode.

16. The flexible display device of claim 15 , further comprising a bank on the anode and the second planarization layer,
wherein the bank covers a lateral end portion of the anode.

17. The flexible display device of claim 16 , further comprising a spacer on the bank.

18. The flexible display device of claim 1 , wherein the light shielding pattern overlaps a portion of the micro coating layer, a portion of the first back plate, and a portion of the second back plate.

19. The flexible display device of claim 2 , further comprising a touch screen panel including the plurality of touch sensors is provided on the display panel.

20. The flexible display device of claim 19 , wherein:
the polarizing plate is located on a top of the touch screen panel; and
the cover glass is provided to cover at least a part of the touch screen panel.

21. The flexible display device of claim 6 , wherein an edge of first fixing tape and an edge of the polarizing plate disposed on the first fixing tape are aligned with each other.

22. The flexible display device of claim 2 , wherein the micro coating layer is extended to cover a portion of side and top surfaces of the polarizing plate.

23. The flexible display device of claim 2 , wherein a part where the polarizing plate and the micro coating layer face each other overlaps with the light shielding pattern.

24. The flexible display device of claim 2 , wherein the polarizing plate and the micro coating layer are in contact with each other.

Assignees

• Lg Display Co Ltd

Inventors

• Yun Junho
• Jang Dongwon
• Baek Lokdam

Classifications

• H10K50/868

  Arrangements for polarized light emission (H10K50/86 takes precedence) · CPC title

• H10K50/8426

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

• H10K2102/311

  Flexible OLED · CPC title