Flexible display substrate including leveling layer
View Patent ↗A flexible display substrate includes: a flexible substrate, a display function layer at a side of the flexible substrate, a film packaging layer at a side of the display function layer facing away from the flexible substrate, and a leveling layer at a side of the film packaging layer facing away from the flexible substrate, where the flexible substrate includes a non-bending area and a bending area, the leveling layer is at least located in the bending area, and the leveling layer is configured to compensate for a height difference between a related film layer structure in the non-bending area and a related film layer structure in the bending area.
1 . A flexible display substrate, comprising:
a flexible substrate;
a display function layer at a side of the flexible substrate;
a film packaging layer at a side of the display function layer facing away from the flexible substrate; and,
a leveling layer at a side of the film packaging layer facing away from the flexible substrate;
wherein the flexible substrate comprises a non-bending area and a bending area, the leveling layer is at least located in the bending area, and the leveling layer is configured to compensate for a height difference between a related film layer structure in the non-bending area and a related film layer structure in the bending area; the related film layer structure in the non-bending area comprises the flexible substrate, the display function layer and the film packaging layer, and the related film layer structure in the bending area comprises the flexible substrate and the film packaging layer;
wherein the flexible display substrate further comprises:
a flexible multi-layer structure at a side of the film packaging layer facing away from the flexible substrate; wherein the leveling layer is located at a side of the flexible multi-layer structure facing away from the flexible substrate, and the flexible multi-layer structure is used to implement a touch function of the flexible display substrate; wherein the flexible multi-layer structure comprises a first metal layer, an insulating layer and a second metal layer;
wherein the leveling layer is only located in the bending area, and a surface of a side of the leveling layer facing away from the flexible substrate is flush with a surface of a side of the flexible multi-layer structure facing away from the flexible substrate in the bending area.
2 . The flexible display substrate according to claim 1 , wherein the leveling layer is made of cured ultraviolet (UV) curing adhesive or thermocuring adhesive.
3 . The flexible display substrate according to claim 1 , wherein the leveling layer is made of cured transparent optical adhesive.
4 . The flexible display substrate according to claim 2 , wherein a modulus of the leveling layer after curing is greater than 100 Mpa.
5 . A display apparatus, comprising the flexible display substrate according to claim 1 .
6 . The display apparatus according to claim 5 , further comprising:
a filter layer on the flexible display substrate.
7 . The display apparatus according to claim 6 , wherein the filter layer is a polarizer or a color filter.
8 . A manufacturing method for the flexible display substrate according to claim 1 , comprising:
providing the flexible substrate, wherein the flexible substrate comprises the non-bending area and the bending area;
forming the display function layer at the side of the flexible substrate;
forming the film packaging layer at the side of the display function layer facing away from the flexible substrate; and
forming the leveling layer at a side of the film packaging layer facing away from the flexible substrate;
wherein the leveling layer is at least located in the bending area, and the leveling layer is configured to compensate for the height difference between the related film layer structure in the non-bending area and the related film layer structure in the bending area; the related film layer structure in the non-bending area comprises the flexible substrate, the display function layer and the film packaging layer, and the related film layer structure in the bending area comprises the flexible substrate and the film packaging layer.
9 . The method according to claim 8 , wherein the forming the leveling layer at the side of the film packaging layer facing away from the flexible substrate comprises:
forming a flexible multi-layer structure at a side of the film packaging layer facing away from the flexible substrate; and
coating the leveling layer on a side of the flexible multi-layer structure facing away from the flexible substrate.
10 . The method according to claim 8 , wherein the forming the leveling layer at the side of the film packaging layer facing away from the flexible substrate comprises:
printing an organic film packaging material on a side of the film packaging layer facing away from the flexible substrate by using an ink jet printing process, to form the leveling layer.
11 . A flexible display substrate, comprising:
a flexible substrate;
a display function layer at a side of the flexible substrate;
a film packaging layer at a side of the display function layer facing away from the flexible substrate; and,
a leveling layer at a side of the film packaging layer facing away from the flexible substrate;
wherein the flexible substrate comprises a non-bending area and a bending area, the leveling layer is at least located in the bending area, and the leveling layer is configured to compensate for a height difference between a related film layer structure in the non-bending area and a related film layer structure in the bending area; the related film layer structure in the non-bending area comprises the flexible substrate, the display function layer and the film packaging layer, and the related film layer structure in the bending area comprises the flexible substrate and the film packaging layer;
wherein the flexible display substrate further comprises:
a flexible multi-layer structure at a side of the film packaging layer facing away from the flexible substrate; wherein the leveling layer is located at a side of the flexible multi-layer structure facing away from the flexible substrate, and the flexible multi-layer structure is used to implement a touch function of the flexible display substrate: wherein the flexible multi-layer structure comprises a first metal layer, an insulating layer and a second metal layer.
12 . A flexible display substrate, comprising:
a flexible substrate;
a display function layer at a side of the flexible substrate;
a film packaging layer at a side of the display function layer facing away from the flexible substrate; and,
a leveling layer at a side of the film packaging layer facing away from the flexible substrate;
wherein the flexible substrate comprises a non-bending area and a bending area, the leveling layer is at least located in the bending area, and the leveling layer is configured to compensate for a height difference between a related film layer structure in the non-bending area and a related film layer structure in the bending area; the related film layer structure in the non-bending area comprises the flexible substrate, the display function layer and the film packaging layer, and the related film layer structure in the bending area comprises the flexible substrate and the film packaging layer;
wherein the flexible display substrate further comprises:
a flexible multi-layer structure at a side of the film packaging layer facing away from the flexible substrate, wherein the leveling layer is disposed between the flexible multi-layer structure and the film packaging layer, the flexible multi-layer structure is used to implement a touch function of the flexible display substrate, and the flexible multi-layer structure comprises a first metal layer, an insulating layer and a second metal layer; wherein the leveling layer is located in both the non-bending area and the bending area, and a surface of a side of the leveling layer facing away from the flexible substrate in the non-bending area is flush with a surface of a side of the leveling layer facing away from the flexible substrate in the bending area; wherein the leveling layer is made of an organic film packaging material;
a barrier dam at a side of the leveling layer facing away from the display function layer, wherein the barrier dam is arranged around the leveling layer.