Flexible display device

Patent metadata

Field	Value
Publication number	US-11972704-B2
Application number	US-202318201181-A
Country	US
Kind code	B2
Filing date	May 24, 2023
Priority date	Dec 27, 2019
Publication date	Apr 30, 2024
Grant date	Apr 30, 2024

Abstract

The flexible display device may include a display panel, including a display area, a non-display area and a bending area, bent in a rear direction so that one edge of the display panel has a predetermined curvature, a first back plate and a second back plate, disposed on a rear surface of the display panel, a cushion tape disposed on a rear surface of the first back plate, and a fixing tape, disposed between the cushion tape and the second back plate, made of an adhesive layer in the bending area. Accordingly, there is an effect of improving the quality of the flexible display device by reducing the peeling defect of the bending area.

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, a first non-display area, a bending area extending from one side of the first non-display area to be bent, and a second non-display area extending from the bending area;
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 on the rear surface of the display panel in the second non-display area,
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.

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 1 , 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 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 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.

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

• G09F9/301 Primary

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