Flexible display device

Patent metadata

Field	Value
Publication number	US-10347700-B2
Application number	US-201615285219-A
Country	US
Kind code	B2
Filing date	Oct 4, 2016
Priority date	Mar 25, 2016
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

A flexible display device includes a protection member, a first adhesion member, a display member, a second adhesion member, and a window member. A thickness of the display member is less than a sum of thicknesses of the protection member and the window member. The display member includes a display panel layer, a touch sensing layer, and a reflection prevention layer integrated with each other to reduce a thickness of the flexible display device. The reduction in thickness enables the flexible display device to be bent with a relatively small radius of curvature, as well as to be repeatedly bent (or otherwise flexed) with reduced potential for delamination of the first and second adhesion members.

First claim

What is claimed is:

1. A flexible display device comprising:
a protection member forming a first outer surface exposed to an outside of the flexible display device;
a window member forming a second outer surface exposed to the outside;
a display member disposed between the protection member and the window member;
a first adhesion member to couple the display member to the protection member; and
a second adhesion member to couple the display member to the window member,
wherein the display member comprises:
a display panel layer forming a first display panel surface and a second display panel surface, the display panel layer comprising:
a display area comprising a plurality of light emitting areas and a non-light emitting area adjacent to the plurality of light emitting areas; and
a non-display area adjacent to the display area;

a touch sensing layer forming a first base surface; and
a reflection prevention layer forming a second base surface, and

wherein:
the touch sensing layer is disposed directly on one of the first display panel surface, the second display panel surface, and the second base surface;
the reflection prevention layer is disposed directly on the second display panel surface or the first base surface; and
a thickness of the display member is less than a sum of thicknesses of the protection member and the window member.

2. The flexible display device of claim 1 , wherein a ratio between the thickness of the display member and the sum of thicknesses of the protection member and the window member is about 1:1.2 to about 1:4.

3. The flexible display device of claim 2 , wherein a ratio between thicknesses of the protection member and the window member is about 5:3 to about 3:7.

4. The flexible display device of claim 3 , wherein a ratio between thicknesses of the first and second adhesion members corresponds to the ratio between thicknesses of the protection member and the window member.

5. The flexible display device of claim 1 , wherein the reflection prevention layer comprises:
a black matrix disposed directly on the second display panel surface or the first base surface; and
a plurality of color filters respectively overlapping with the plurality of light emitting areas.

6. The flexible display device of claim 5 , wherein:
the black matrix comprises:
a light shield portion overlapping with the non-light emitting area; and
a bezel portion overlapping with the non-display area; and

the bezel portion is thicker than the light shield portion.

7. The flexible display device of claim 6 , wherein the light shield portion and the bezel portion are integrated with each other.

8. The flexible display device of claim 6 , wherein:
the bezel portion comprises a plurality of layers; and
a first layer of the plurality of layers is integrated with the light shield portion.

9. The flexible display device of claim 8 , wherein an i-th layer (“i” being a natural number greater than or equal to two) disposed on the first layer of the plurality of layers comprises a colored layer.

10. The flexible display device of claim 6 , wherein at least one of the light shield portion and the bezel portion comprises an inclined side surface in a cross-sectional view.

11. The flexible display device of claim 1 , wherein the display panel layer comprises:
a base layer comprising the first display panel surface;
a circuit layer disposed on the base layer;
an organic light emitting device layer disposed on the circuit layer; and
a thin film encapsulation layer to seal the organic light emitting device layer, the thin film encapsulation layer comprising the second display panel surface.

12. The flexible display device of claim 11 , wherein the protection member is thicker than the base layer.

13. The flexible display device of claim 1 , wherein the window member comprises:
a base film forming a surface disposed directly on the second adhesion member; and
a hard coating layer disposed on the base film.

14. The flexible display device of claim 13 , wherein the window member further comprises:
a functional coating layer disposed on the base film.

15. The flexible display device of claim 13 , wherein the window member further comprises:
a black matrix disposed directly on the surface of the base film, the black matrix overlapping with the non-display area.

16. The flexible display device of claim 1 , wherein the reflection prevention layer comprises:
a plurality of metal-containing layers overlapping with the display area and the non-display area; and
a plurality of dielectric layers overlapping with the display area and the non-display area, the plurality of dielectric layers being alternately stacked with the plurality of metal-containing layers.

17. The flexible display device of claim 16 , wherein the reflection prevention layer further comprises:
a black matrix overlapping with the non-light emitting area and the non-display area.

18. The flexible display device of claim 1 , wherein the touch sensing layer comprises:
a plurality of first conductive patterns disposed directly on one of the first display panel surface, the second display panel surface, and the second base surface, the plurality of first conductive patterns overlapping with the non-light emitting area;
a touch insulation layer covering the first conductive patterns; and
a plurality of second conductive patterns disposed on the touch insulation layer, the plurality of second conductive patterns overlapping with the non-light emitting area.

19. The flexible display device of claim 18 , wherein:
the plurality of first conductive patterns forms a first mesh shape, the first mesh shape comprising a plurality of first openings corresponding to some of the plurality of light emitting areas; and
the plurality of second conductive patterns forms a second mesh shape, the second mesh shape comprising a plurality of second openings corresponding to some of the plurality of light emitting areas.

20. A flexible display device comprising:
a protection member forming a first outer surface exposed to an outside of the flexible display device;
a window member forming a second outer surface exposed to the outside;
a display member disposed between the protection member and the window member;
a first adhesion member to couple the display member to the protection member; and
a second adhesion member to couple the display member to the window member,
wherein the display member comprises:
a display panel layer forming a first display panel surface disposed directly on the first adhesion member and a second display panel surface, the display panel layer comprising:
a display area comprising a plurality of light emitting areas and a non-light emitting area adjacent to the plurality of light emitting areas; and
a non-display area adjacent to the display area; and

a touch sensing layer forming:
a first base surface disposed directly on the second adhesion member; and
a second surface opposing the first base surface, the second surface being disposed directly on the second display panel surface,

wherein the touch sensing layer comprises:
a plurality of first conductive patterns overlapping with the non-light emitting area, the plurality of first conductive patterns being disposed directly on the second display panel surface;
a plurality of second conductive patterns overlapping with the non-light emitting area; and
a touch insulation layer configured to insulate the plurality of first conductive patterns f

Assignees

• Samsung Display Co Ltd

Inventors

• Yang Taehoon
• Lee Yongsu
• Kim Sungchul
• Kim Sunghoon
• Yun Sungsik
• Lee Kyoungah

Classifications

• G06F2203/04112

  Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material · CPC title

• H01L2251/5338

  Electricity · mapped topic

• H01L51/0097

  Electricity · mapped topic

• G06F3/044

  by capacitive means · CPC title

• H01L27/323 Primary

  Electricity · mapped topic