Flexible display apparatus

1. A flexible display apparatus comprising a bending area and a non-bending area, the flexible display apparatus further comprising:

a display panel; and

a polarizing structure disposed on the display panel,

wherein the polarizing structure comprises:

a liquid crystal coating layer forming a phase retardation layer;

a linear polarizer disposed on the liquid crystal coating layer, the linear polarizer comprising a stretched polymer film;

a first adhesive structure disposed directly on a first surface of the liquid crystal coating layer, the first adhesive structure being an adhesive layer with a glass transition temperature that is greater than or equal to 40° C. and less than or equal to 150° C.;

a second adhesive structure disposed directly on a second surface of the liquid crystal coating layer opposing the first surface of the liquid crystal coating layer, the second adhesive structure being an adhesive layer with a glass transition temperature that is greater than or equal to −35° C. and less than or equal to 0° C.;

another phase retardation layer disposed on the liquid crystal coating layer;

a first optical compensation layer disposed directly on the second adhesive structure;

a second optical compensation layer disposed directly on the first adhesive structure, the second optical compensation layer being disposed between the liquid crystal coating layer and the another phase retardation layer;

a third adhesive structure disposed between the linear polarizer and the another phase retardation layer; and

a fourth adhesive structure disposed between the another phase retardation layer and the second optical compensation layer,

wherein the third adhesive structure is:

a pressure sensitive adhesive layer with a glass transition temperature that is greater than or equal to −35° C. and less than or equal to 0° C., or

an adhesive layer with a glass transition temperature that is greater than or equal to 40° C. and less than or equal to 150° C., and

wherein:

the phase retardation layer is a λ/4 phase retardation layer;

the another phase retardation layer is a λ/2 phase retardation layer; and

the fourth adhesive structure is an adhesive layer with a glass transition temperature that is greater than or equal to 40° C. and less than or equal to 150° C.

2. The flexible display apparatus of claim 1 , wherein a thickness of the first adhesive structure is greater than or equal to 0.1 μm and less than or equal to 5 μm.

3. The flexible display apparatus of claim 1 , wherein:

the first adhesive structure comprises an ultraviolet curable adhesive; and

the second adhesive structure comprises a pressure sensitive adhesive.

4. The flexible display apparatus of claim 1 , wherein a thickness of the liquid crystal coating layer is greater than or equal to 0.5 μm and less than or equal to 5 μm.

5. The flexible display apparatus of claim 1 , wherein each of the first optical compensation layer and the second optical compensation layer is a positive C-plate or a negative C-plate.

6. The flexible display apparatus of claim 1 , wherein, in a plan view, an angle between an absorption axis or a transmission axis of the linear polarizer and a first optical axis of the liquid crystal coating layer is 45 degrees±30 degrees.

7. The flexible display apparatus of claim 1 , wherein, in a plan view:

an angle between an absorption axis or a transmission axis of the linear polarizer and a first optical axis of the liquid crystal coating layer is 75 degrees±30 degrees; and

an angle between the absorption axis or the transmission axis and a second optical axis of the another phase retardation layer is 15 degrees±13 degrees.

8. The flexible display apparatus of claim 1 , wherein, in a plan view, an angle between a first optical axis of the liquid crystal coating layer and a second optical axis of the another phase retardation layer is 60 degrees±30 degrees.

9. The flexible display apparatus of claim 1 , wherein:

the liquid crystal coating layer is a nematic liquid crystal coating layer; and

the another phase retardation layer is a discotic liquid crystal coating layer.

10. The flexible display apparatus of claim 1 , wherein:

in a first mode, the display panel and the polarizing structure are bent with respect to a bending axis such that the polarizing structure is disposed closer to the bending axis than the display panel; and

in a second mode, the display panel and the polarizing structure are unfolded.

11. The flexible display apparatus of claim 1 , wherein:

in a third mode, the display panel and the polarizing structure are bent with respect to a bending axis such that the display panel is disposed closer to the bending axis than the polarizing structure; and

in a fourth mode, the display panel and the polarizing structure are unfolded.

12. The flexible display apparatus of claim 1 , wherein the bending area is bent from one side of the non-bending area.

13. The flexible display apparatus of claim 1 , wherein a radius of curvature of the bending area is greater than 0 mm and less than or equal to 5 mm.

14. The flexible display apparatus of claim 1 , further comprising:

a touch sensing structure disposed on the display panel,

wherein the touch sensing structure is disposed on an upper surface or a lower surface of the polarizing structure.

15. The flexible display apparatus of claim 1 , wherein at least one of a degree of polymerization and a degree of cross-linking of the first adhesive structure is different from that of the second adhesive structure.