Stretch display device and preparation method
View Patent ↗The present disclosure discloses a stretch display device and a preparation method. The method includes providing a substrate on which a flexible substrate is disposed, and a film layer constituting a thin film transistor disposed on a side of the flexible substrate away from the substrate, the film layer being away from the flexible substrate. One side defines a plurality of pixel regions; a hollow portion is formed between adjacent two of the pixel regions, the hollow portion penetrates through the film layer and the flexible substrate; and thermal separation is provided in the hollow portion via a gel; a light-emitting element is disposed in the pixel region, and an encapsulating film layer is disposed on a side of the light-emitting element and the thermal separation gel away from the flexible substrate; heating the thermal separation gel, and the flexible liner. The bottom and the substrate are peeled off. Therefore, when the substrate is peeled off by this method, the problem of breakage of the flexible substrate and the film layer constituting the thin film transistor can be alleviated, and the production yield of the stretch display device can be remarkably improved.
1. A method of preparing a stretch display device, comprising:
providing a substrate on which a flexible substrate is disposed;
providing a film layer for forming a thin film transistor on a side of the flexible substrate away from the substrate, the film layer defining a plurality of pixel regions away from the side of the flexible substrate;
forming a hollow portion between two adjacent pixel regions, the hollow portion penetrating the film layer and the flexible substrate;
providing a thermal separation glue in the hollow portion;
providing a light-emitting element in each pixel region of the plurality of pixel regions, and providing an encapsulating film layer on a side of the light-emitting element and the thermal separation glue away from the flexible substrate; and
heating the thermal separation glue and stripping the flexible substrate and the substrate.
2. The method of claim 1 , wherein after the hollow portion is formed between two adjacent of the pixel regions, and before the thermal separation glue is disposed in the hollow portion, the method further comprises:
providing a pixel defining structure on a side of the film layer away from the flexible substrate, the pixel defining structure defining the plurality of pixel regions,
wherein a package partition wall is disposed on a side of the pixel defining structure adjacent to the hollow portion.
3. The method of claim 2 , wherein the thermal separation glue is away from a side of the substrate and is flush with a side of the film layer away from the substrate.
4. The method of claim 2 , wherein said thermal separation glue is remote from one side of said substrate above said film layer and below said package partition wall.
5. The method of claim 1 , wherein the film layer comprises a buffer layer, a gate insulating layer, an interlayer dielectric layer, and an insulating layer which are sequentially stacked, wherein the buffer layer is adjacent to the flexible substrate.
6. The method of claim 1 , wherein the thermal separation glue has a thickness of from 1 to 50 μm.
7. The method of claim 1 , wherein providing the thermal separation glue comprises at least one of printing and coating.
8. The method of claim 1 , wherein heating the thermal separation glue comprises heating the thermal separation glue to a temperature between 60 and 120° C.
9. The method of claim 8 , wherein the thermal separation glue comprises at least one of azodicarbonamide, diazoaminobenzene, and p-toluenesulfonylhydrazide.
10. The method of claim 1 , wherein after the thermal separation glue is heated, and before the substrate is peeled off, the method further comprises:
removing the thermal separation glue and the encapsulating film layer covering the thermal separation glue.
11. The method of claim 10 , wherein the removing the thermal separation glue and the encapsulating film layer covering the thermal separation glue comprises:
heating the thermal separation glue to break the encapsulating film layer covering the thermal separation glue from the encapsulating film layer covering remaining regions; and
inverting the flexible substrate provided with the thermal separation glue to take out the thermal separation glue.
12. The method of claim 1 , wherein after the substrate is peeled off, the method further comprises:
removing the thermal separation glue and the encapsulating film layer covering the thermal separation glue.
13. The method of claim 12 , wherein the removing the thermal separation glue and the encapsulating film layer covering the thermal separation glue comprises:
heating the thermal separation glue to break the encapsulating film layer covering the thermal separation glue from the encapsulating film layer covering remaining regions; and
inverting the flexible substrate provided with the thermal separation glue to take out the thermal separation glue.