METHOD FOR FABRICATING FLEXIBLE DISPLAY DEVICE, FLEXIBLE DISPLAY DEVICE, AND DISPLAY APPARATUS

• US 20190036024A1
• Filed: 08/22/2017
• Published: 01/31/2019
• Est. Priority Date: 07/31/2017
• Status: Active Grant

• Current Assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: BAI, Sihang
• Granted Patent: US 10,658,592 B2
• Time in Patent Office: Days
• CPC Class Codes: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/40 Thermal treatment, e.g. annealing in the presence of a solvent vapour
• CPC Class Codes: H10K 71/80 using temporary substrates
• CPC Class Codes: H10K 77/111 Flexible substrates
• CPC Class Codes: Y02E 10/549 Organic PV cells

Abstract

The present application discloses a method for fabricating a flexible display device, a flexible display device and a display apparatus, the method including: disposing a separation layer on a surface of a substrate; disposing a flexible substrate on a surface of the separation layer away from the substrate; disposing a display assembly on a surface of the flexible substrate away from the separation layer; separating the flexible substrate from the separation layer to obtain the flexible display device; wherein an adhesion between the flexible substrate and the surface of the substrate is greater than an adhesion between the separation layer and the surface of the flexible substrate, an adhesion between the separation layer and the surface of the substrate is greater than the adhesion between the separation layer and the surface of the flexible substrate. By the above method, the application can increase the yield of the flexible display device.

Claims

1. A flexible display device, comprising:

a flexible substrate and a display assembly disposed on a surface of the flexible substrate;

wherein the flexible display device is obtained by the fabricating method comprises;

disposing a separation layer on a surface of a substrate;

disposing the flexible substrate on a surface of the separation layer away from the substrate;

disposing the display assembly on a surface of the flexible substrate away from the separation layer;

separating the flexible substrate from the separation layer to obtain the flexible display device;

an adhesion between the flexible substrate and the surface of the substrate greater than an adhesion between the separation layer and the surface of the flexible substrate, an adhesion between the separation layer and the surface of the substrate greater than the adhesion between the separation layer and the surface of the flexible substrate;

wherein the flexible substrate is separated from the surface in contact with the separation layer by a mechanical method; and

the display assembly comprising an inorganic film layer, a flexible substrate, a barrier layer, a buffer layer, a display panel, and an encapsulation layer sequentially deposited on the surface of the flexible substrate away from the separation layer.

2. The flexible display device according to claim 1, wherein the material of the separation layer is titanium dioxide nanoparticles;

and the separation layer is obtained by coating a solution containing the titanium dioxide nanoparticles on the surface of the substrate, and performing a high-temperature annealing process followed by the coating of the solution for the formation of the separation layer.

3. The flexible display device according to claim 1, wherein the separation layer covering a first region of the surface of the substrate, the flexible substrate covering a second region of the surface of the substrate, wherein the second region is a region of the surface of the substrate not covered by the separation layer;

and

the flexible substrate is separated from the separation layer by the mechanical roller in the direction perpendicular to cutting lines;

wherein the cutting lines are formed in the boundaries of the laminated the separation layer and the flexible substrate by laser.

4. The flexible display device according to claim 1, wherein the flexible substrate is a polyimide thin film.

5. A method for fabricating a flexible display device, comprising:

disposing a separation layer on a surface of a substrate;

disposing a flexible substrate on a surface of the separation layer away from the substrate;

disposing a display assembly on a surface of the flexible substrate away from the separation layer;

separating the flexible substrate from the separation layer to obtain the flexible display device; and

wherein an adhesion between the flexible substrate and the surface of the substrate is greater than an adhesion between the separation layer and the surface of the flexible substrate, an adhesion between the separation layer and the surface of the substrate is greater than the adhesion between the separation layer and the surface of the flexible substrate.

6. The method according to claim 5, wherein a material of the separation layer is titanium dioxide nanoparticles.

7. The method according to claim 5, wherein the step of separating the flexible substrate from the separation layer comprises:

separating the flexible substrate through mechanical methods from the surface in contact with the separation layer to make the flexible substrate separating from the substrate to obtain the flexible display device.

8. The method according to claim 7, wherein the separation layer covering a first region of the surface of the substrate, the flexible substrate covering a second region of the surface of the substrate, wherein the second region is a region of the surface of the substrate not covered by the separation layer.

9. The method according to claim 8, wherein the step of separating the flexible substrate from the separation layer further comprises:

cutting boundaries of the laminated the separation layer and the flexible substrate by laser to form cutting lines; and

the step of separating the flexible substrate through a mechanical method from a surface in contact with the separation layer comprising;

separating the flexible substrate from the separation layer by the mechanical roller in the direction perpendicular to cutting lines.

10. The method according to claim 6, wherein disposing the separation layer on the surface of the substrate comprises:

coating a solution containing titanium dioxide nanoparticles on the surface of the substrate; and

performing a high-temperature annealing process to the solution to form the separation layer.

11. The method according to claim 5, wherein the step of disposing a flexible substrate on a surface of the separation layer away from the substrate comprises:

coating a polyimide film on the surface of the separation layer away from the substrate to form the flexible substrate.

12. The method according to claim 5, wherein the step of disposing a display assembly on a surface of the flexible substrate away from the separation layer comprises:

depositing an inorganic film layer, a flexible substrate, a barrier layer, a buffer layer, a display panel and an encapsulation layer sequentially on the surface of the flexible substrate away from the separation layer.

13. A display apparatus comprising a flexible display device, the flexible display device comprising:

a flexible substrate and a display assembly disposed on a surface of the flexible substrate;

wherein the flexible display device is obtained by the fabricating method comprises;

disposing a separation layer on a surface of a substrate;

disposing the flexible substrate on a surface of the separation layer away from the substrate;

disposing the display assembly on a surface of the flexible substrate away from the separation layer;

separating the flexible substrate from the separation layer to obtain the flexible display device; and

an adhesion between the flexible substrate and the surface of the substrate is greater than an adhesion between the separation layer and the surface of the flexible substrate, an adhesion between the separation layer and the surface of the substrate is greater than the adhesion between the separation layer and the surface of the flexible substrate.

14. The display apparatus according to claim 13, wherein the material of the separation layer is titanium dioxide nanoparticles.

15. The display apparatus according to claim 13, wherein the flexible substrate is separated through a mechanical method from a surface in contact with the separation layer.

16. The display apparatus according to claim 15, wherein the separation layer covering a first region of the surface of the substrate, the flexible substrate covering a second region of the surface of the substrate, wherein the second region is a region of the surface of the substrate not covered by the separation layer.

17. The display apparatus according to claim 16, wherein the flexible substrate is separated from the separation layer by the mechanical roller in the direction perpendicular to cutting lines;

and

wherein the cutting lines are formed in the boundaries of the laminated the separation layer and the flexible substrate by laser.

18. The display apparatus according to claim 17, wherein the formation of the separation layer is by coating a solution containing titanium dioxide nanoparticles on the surface of the substrate;

and performing a high-temperature annealing process to the solution.

19. The display apparatus according to claim 13, wherein the flexible substrate is a polyimide thin film.

20. The display apparatus according to claim 13, wherein the display assembly comprising an inorganic film layer, a flexible substrate, a barrier layer, a buffer layer, a display panel, and an encapsulation layer sequentially deposited on the surface of the flexible substrate away from the separation layer.