Flexible display device

Patent metadata

Field	Value
Publication number	US-10153457-B2
Application number	US-201615235818-A
Country	US
Kind code	B2
Filing date	Aug 12, 2016
Priority date	Aug 13, 2015
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

A flexible display device comprises a flexible substrate including a display area and a non-display area; a display layer in the display area on a first surface of the flexible substrate; a polarizing plate on the display layer; and a cover coat in the non-display area on the first surface of the flexible substrate, the cover coat including a first end portion overlapping with the polarizing plate. At least a portion of the non-display area of the flexible substrate and the cover coat are bendable in a bending direction.

First claim

What is claimed is:

1. A flexible display device, comprising:
a flexible substrate including a display area and a non-display area;
a display layer in the display area on a first surface of the flexible substrate;
a polarizing plate on the display layer;
a first adhesive layer on the polarizing plate; and
a cover coat on the first surface of the flexible substrate and including a first end portion in the display area near a boundary with the non-display area and a second end portion in the non-display area, the first end portion overlapping with an end portion of the polarizing plate in the display area near the boundary with the non-display area,
wherein the first end portion of the cover coat is sandwiched between the polarizing plate and the first adhesive layer, and
wherein at least a portion of the non-display area of the flexible substrate and the cover coat are bendable in a bending direction.

2. The flexible display device of claim 1 , wherein the first end portion of the cover coat is disposed between the polarizing plate and the first adhesive layer.

3. The flexible display device of claim 1 , further comprising a second adhesive layer disposed on the display layer and under the polarizing plate.

4. The flexible display device of claim 3 , wherein the first end portion of the cover coat is disposed between the display layer and the second adhesive layer, or between the second adhesive layer and the polarizing plate.

5. The flexible display device of claim 3 , further comprising a barrier film disposed on the display layer and under the second adhesive layer,
wherein the first end portion of the cover coat is disposed between the display layer and the barrier film, between the barrier film and the second adhesive layer, or between the second adhesive layer and the polarizing plate.

6. The flexible display device of claim 1 , further comprising:
an adhesive layer disposed on the display layer and under the polarizing plate,
wherein the first end portion of the cover coat is disposed between the display layer and the adhesive layer, or between the adhesive layer and the polarizing plate.

7. The flexible display device of claim 1 , further comprising:
a barrier film disposed on the display layer and under the polarizing plate; and
an adhesive layer disposed on the barrier film and under the polarizing plate,
wherein the first end portion of the cover coat is disposed between the display layer and the barrier film, between the barrier film and the adhesive layer, or between the adhesive layer and the polarizing plate.

8. The flexible display device of claim 1 , further comprising an over coat layer on the first adhesive layer and bonded to the polarizing plate through the first adhesive layer.

9. A flexible display device, comprising:
a flexible substrate including a display area and a non-display area;
a display layer in the display area on a first surface of the flexible substrate;
at least two additional layers on the display layer; and
a cover coat on the first surface of the flexible substrate and including a first end portion in the display area near a boundary with the non-display area and a second end portion in the non-display area, the first end portion of the cover coat overlapping with an end portion of the two additional layers in the display area near the boundary with the non-display area and being disposed between the display layer and the two additional layers,
wherein the first end portion of the cover coat is sandwiched between the two additional layers, and
wherein at least a portion of the non-display area of the flexible substrate and the cover coat are bendable in a bending direction.

10. The flexible display device of claim 9 , further comprising:
a drive integrated circuit (IC) connection member disposed in the non-display area on the first surface of the flexible substrate,
wherein the second end portion of the cover coat covers an end of the drive IC connection member in the non-display area.

11. The flexible display device of claim 10 , wherein the drive IC connection member includes at least one of a tape carrier package (TCP) and a chip on film (COF).

12. The flexible display device of claim 9 , further comprising:
a first back plate disposed in the display area on a second surface of the flexible substrate opposite the first surface;
a second back plate disposed in the non-display area on the second surface of the flexible substrate; and
a supporting member positioned between the first back plate and the second back plate when the flexible substrate is bent in the bending direction.

13. The flexible display device of claim 12 , wherein, with the flexible substrate in a state of being bent in the bending direction, the supporting member includes an end portion having a semicircular shape and contacting the second surface of the flexible substrate at a bent area of the flexible substrate.

14. The flexible display device of claim 13 , wherein, with the flexible substrate in a state of being bent in the bending direction, the semicircular end portion of the supporting member has a radius substantially equal to a radius of the bent area of the flexible substrate so that the semicircular end portion of the supporting member substantially entirely contacts the second surface of the flexible substrate a the bent area of the flexible substrate.

15. The flexible display device of claim 9 , wherein each of the two additional layers is one of a polarizing plate, an adhesive layer, and a barrier film.

16. A flexible display device, comprising:
a flexible substrate including a display area and a non-display area;
a display layer in the display area on a first surface of the flexible substrate;
at least two additional layers on the display layer;
a bendable cover coat on the first surface of the flexible substrate and having a first end portion disposed in the display area near a boundary with the non-display area and a second end portion disposed in the non-display area, the first end portion of the cover coat overlapping with an end portion of the display layer in the display area near the boundary with the non-display area;
a first back plate disposed in the display area on a second surface of the flexible substrate opposite the first surface;
a second back plate disposed in the non-display area on the second surface of the flexible substrate; and
a supporting member positioned between the first back plate and the second back plate with the flexible substrate in a state of being bent in the bending direction,
wherein the first end portion of the bendable cover coat is sandwiched between the two additional layers.

17. The flexible display device of claim 16 , wherein, with the flexible substrate in a state of being bent in the bending direction, the supporting member includes an end portion having a semicircular shape and contacting the second surface of the flexible substrate at a bent area of the flexible substrate.

18. The flexible display device of claim 17 , wherein, with the flexible substrate in a state of being bent in the bending direction, the semicircular end portion of the supporting member has a radius substantially equal to a radius of the bent area of the flexible substrate so that the semicircular end portion of the supporting member substantially entirely contacts the second surface of the flexible substrate a the bent area of the flexible substrate.

19. The flexible display device of claim 16 , further comprising:
a drive integrated circuit (IC) connecti

Assignees

• Lg Display Co Ltd

Inventors

• Son Haejoon
• Choi Siehyug
• Yoo Juhnsuk
• Kim Moongoo
• Park Jehong
• Kim Chiwoong

Classifications

• H10W90/00

  Package configurations · CPC title

• Y02E10/549

  Organic PV cells · CPC title

• H01L51/5281

  Electricity · mapped topic

• H01L25/167

  Electricity · mapped topic

• H01L51/5253 Primary

  Electricity · mapped topic