Flexible display panel having buffer portion improving rigidity in folding portion
A flexible display panel includes a glass substrate, a circuit layer disposed on the glass substrate and configured to drive a pixel, a light-emitting element layer disposed on the circuit layer, an encapsulation layer which covers the circuit layer and the light-emitting element layer, a polarizing plate disposed on the encapsulation layer, and a cover glass disposed on the polarizing plate, at least one of the glass substrate and the cover glass includes a buffer portion, the buffer portion includes an organic filler and glass, the glass of the buffer portion has a thickness less than or equal to a thickness of the glass substrate and includes a pattern of a specific shape, thus, rigidity of a folding portion in which the buffer portion is located can be increased due to the glass in the buffer portion.
1. A flexible display panel comprising:
a glass substrate;
a circuit layer disposed on the glass substrate and configured to drive a pixel;
a light-emitting element layer disposed on the circuit layer;
an encapsulation layer disposed on the circuit layer and the light-emitting element layer;
a polarizing plate disposed on the encapsulation layer; and
a cover glass disposed on the polarizing plate,
wherein the glass substrate includes a first buffer portion that includes an organic filler and glass,
wherein the cover glass includes a second buffer portion,
wherein a glass of the first buffer portion has a thickness less than or equal to a thickness of the glass substrate, and
wherein beads are disposed in the second buffer portion.
2. The flexible display panel of claim 1 , wherein the second buffer portion further includes an organic filler including the beads,
wherein a glass of the second buffer portion has a thickness less than or equal to a thickness of the cover glass.
3. The flexible display panel of claim 1 , wherein at least one of the first and second buffer portions further includes a quantum dot (QD) material.
4. The flexible display panel of claim 1 , wherein the beads are disposed in a folding area overlapping with the glass substrate.
5. The flexible display panel of claim 1 , wherein the beads include a quantum dot (QD) material.
6. A flexible display panel comprising
a glass substrate;
a circuit layer disposed on the glass substrate and configured to drive a pixel;
a light-emitting element layer disposed on the circuit layer;
an encapsulation layer disposed on the circuit layer and the light-emitting element layer;
a polarizing plate disposed on the encapsulation layer;
a cover glass disposed on the polarizing plate; and
a bead film disposed between the polarizing plate and the cover glass and in which beads are dispersed,
wherein at least one of the glass substrate and the cover glass includes a buffer portion that includes an organic filler and glass.
7. The flexible display panel of claim 6 , wherein the beads are disposed in a folding area overlapping with the buffer portion of the glass substrate.
8. The flexible display panel of claim 7 , wherein the beads film includes a quantum dot (QD) material.
9. A flexible display panel comprising:
a glass substrate:
a circuit layer disposed on the glass substrate and configured to drive a pixel;
a light-emitting element layer disposed on the circuit layer;
an encapsulation layer disposed on the circuit layer and the light-emitting element layer;
a polarizing plate disposed on the encapsulation layer; and
a cover glass disposed on the polarizing plate,
wherein at least one of the glass substrate and the cover glass includes a buffer portion that includes an organic filler and glass,
wherein the at least one of the glass substrate and the cover glass includes a first folding area having a first curvature being a maximum curvature and a second folding area immediately adjacent to the first folding area having a second curvature that is smaller than the first curvature, and
wherein a glass located in the first folding area has a thickness different from that of the glass located in the second folding area.
10. The flexible display panel of claim 1 , wherein a ratio of a thickness of the organic filler to a thickness of the glass in the buffer portion is in a range of 6 to 10:4 to 9.
11. The flexible display panel of claim 10 , wherein the ratio of the thickness of the organic filler to the thickness of the glass in the buffer portion is 6:4.
12. The flexible display panel of claim 1 , wherein a sidewall of an edge of the glass substrate includes a wedge-shaped tapered surface which is vertically symmetrical and a thickness of the sidewall is decreased in a direction toward an end of the sidewall.
13. The flexible display panel of claim 1 , wherein a sidewall of an edge of the glass substrate includes a wedge-shaped tapered surface which is vertically symmetrical and a thickness of the sidewall is decreased in a direction toward an end of the sidewall,
wherein the wedge-shaped tapered surface protrudes out of the circuit layer.
14. The flexible display panel of claim 1 , wherein a sidewall of an edge of the glass substrate includes a wedge-shaped tapered surface which is vertically symmetrical and a thickness of the sidewall is decreased in a direction toward an end of the sidewall,
wherein a length of the wedge-shaped tapered surface is inversely proportional to the thickness of the glass substrate.
15. A flexible display panel comprising:
a glass substrate;
a circuit layer disposed on the glass substrate and configured to drive a pixel;
a light-emitting element layer disposed on the circuit layer;
an encapsulation layer disposed on the circuit layer and the light-emitting element layer;
a polarizing plate disposed on the encapsulation layer; and
a cover glass disposed on the polarizing plate,
wherein at least one of the glass substrate and the cover glass includes a buffer portion that includes an organic filler and glass, and
wherein the at least one of the glass substrate and the cover glass includes a first folding area having a first curvature being a maximum curvature and a second folding area immediately adjacent to the first folding area having a second curvature that is smaller than the first curvature, and
wherein the organic filler included in the first folding area has a thickness different from that of the organic filler included the second folding area.
16. The flexible display panel of claim 1 , wherein the light-emitting element layer includes an organic light-emitting diode (OLED), and
wherein the circuit layer includes a transistor configured to supply current to the organic light-emitting diode.
17. The flexible display panel of claim 9 , wherein the first folding area in which the buffer portion is located is bendable in the flexible display panel.
18. The flexible display panel of claim 15 , wherein a sidewall of an edge of the glass substrate includes a wedge-shaped tapered surface which is vertically symmetrical and a thickness of the sidewall is decreased in a direction toward an end of the sidewall.
19. The flexible display panel of claim 18 , wherein the wedge-shaped tapered surface protrudes out of the circuit layer.
20. The flexible display panel of claim 18 , wherein a length of the wedge-shaped tapered surface is inversely proportional to the thickness of the glass substrate.
21. The flexible display panel of claim 6 , wherein a sidewall of an edge of the glass substrate includes a wedge-shaped tapered surface which is vertically symmetrical and a thickness of the sidewall is decreased in a direction toward an end of the sidewall.
22. The flexible display panel of claim 9 , wherein a sidewall of an edge of the glass substrate includes a wedge-shaped tapered surface which is vertically symmetrical and a thickness of the sidewall is decreased in a direction toward an end of the sidewall.
23. The flexible display panel of claim 6 , wherein a sidewall of an edge of the glass substrate includes a wedge-shaped tapered surface which is vertically symmetrical and a thickness of the sidewall is decreased in a direction toward an end of the sidewall,
wherein the wedge-shaped tapered surface protrudes out of the circuit layer.
24. The flexible display panel of claim 9 , wherein a sidewall of an edge of the glass substrate includes a wedge-shaped tapered surface which is vertically symmetrical and a thickness of the sidewall is decreased in a direction toward an end of the sidewall,
wherein the wedge-shaped tapered surface protrudes out of the circuit layer.
25. The flexible display panel of claim 6 , wherein a sidewall of an edge of the glass substrate includes a wedge-shaped tapered surface which is vertically symmetrical and a thickness of the sidewall is decreased in a direction toward an end of the sidewall,
wherein a length of the wedge-shaped tapered surface is inversely proportional to the thickness of the glass substrate.
26. The flexible display panel of claim 9 , wherein a sidewall of an edge of the glass substrate includes a wedge-shaped tapered surface which is vertically symmetrical and a thickness of the sidewall is decreased in a direction toward an end of the sidewall,
wherein a length of the wedge-shaped tapered surface is inversely proportional to the thickness of the glass substrate.
27. The flexible display panel of claim 15 , wherein the first folding area in which the buffer portion is located is bendable in the flexible display panel.