FLEXIBLE PANEL, MANUFACTURING METHOD FOR THE SAME AND DISPLAY DEVICE

• US 20190326544A1
• Filed: 09/12/2018
• Published: 10/24/2019
• Est. Priority Date: 04/19/2018
• 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: HUANG, Jing, HSU, HSIANG LUN
• Granted Patent: US 10,756,297 B2
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells
• CPC Class Codes: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 2102/351 Thickness
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/8428 Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 59/8723 Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
• CPC Class Codes: H10K 59/873 Encapsulations
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/166 using selective deposition, e.g. using a mask
• CPC Class Codes: H10K 77/111 Flexible substrates

Abstract

A flexible panel is provided. The flexible panel includes a substrate, an organic light-emitting diode device, a thin-film encapsulation layer and a retaining wall. Wherein the organic light-emitting diode device is formed on the substrate, the thin-film encapsulation layer is formed on the substrate and covers the organic light-emitting diode device, the retaining wall is disposed on the substrate and is around an outside of the organic light-emitting diode device. Wherein the first portion is closer to a light-emitting region of the flexible panel than the second portion. A manufacturing method for the flexible panel and a display device using the flexible panel are also disclosed.

Claims

1. A flexible panel, comprising:

a substrate, an organic light-emitting diode device, a thin-film encapsulation layer and a retaining wall;

wherein the organic light-emitting diode device is formed on the substrate, the thin-film encapsulation layer is formed on the substrate and covers the organic light-emitting diode device, the retaining wall is disposed on the substrate and is around an outside of the organic light-emitting diode device; and

wherein the retaining wall includes a first portion and a second portion, the first portion is closer to a light-emitting region of the flexible panel than the second portion.

2. The flexible panel according to claim 1, wherein each of the first portion and the second portion of the retaining wall includes multiple protrusions that are disposed at intervals and around the organic light-emitting diode device, the protrusions of the first portion and the protrusions of the second portion are staggered.

3. The flexible panel according to claim 2, wherein a height of each of the first portion and the second portion is in range of 0.01 um to 3 um, and a width of each of the first portion and the second portion is in a range of 5 um to 50 um.

4. The flexible panel according to claim 2, wherein a gap is existed between the protrusion of the first portion and the protrusion of the adjacent second portion.

5. The flexible panel according to claim 1, wherein the retaining wall is an integral structure, the retaining wall includes a first portion, a second portion, and a side wall that connects the first portion and the second portion;

the first portion and the second portion are mutually staggered, and the adjacent first portion and the second portion are integrally connected through the side wall to form a saw-tooth closed structure.

6. The flexible panel according to claim 1, wherein the organic light-emitting diode device includes a driving circuit, a planarization layer, a first electrode, a pixel definition layer, and an organic light-emitting structure and a second electrode which are sequentially formed on the substrate.

7. The flexible panel according to claim 6, wherein a material of the retaining wall and a material of the planarization layer and the pixel definition layer are the same, and the first portion and the second portion of the retaining wall are formed in a same mask process as the planarization layer and the pixel definition layer.

8. The flexible panel according to claim 7, wherein the material of each of the retaining wall and the pixel definition layer is one or a combination of an organic material selected from a photoresist, an epoxy resin, a poly(methyl methacrylate) resin, a polyimide resin, an acrylic resin, or one or a combination of an inorganic material of a silicon compound.

9. A display device, comprising:

a flexible panel and a cover plate disposed on the flexible panel;

wherein the flexible panel comprises;

a substrate, an organic light-emitting diode device, a thin-film encapsulation layer and a retaining wall;

wherein the organic light-emitting diode device is formed on the substrate, the thin-film encapsulation layer is formed on the substrate and covers the organic light-emitting diode device, the retaining wall is disposed on the substrate and is around an outside of the organic light-emitting diode device; and

wherein the retaining wall includes a first portion and a second portion, the first portion is closer to a light-emitting region of the flexible panel than the second portion.

10. The display device according to claim 9, wherein each of the first portion and the second portion of the retaining wall includes multiple protrusions that are disposed at intervals and around the organic light-emitting diode device, the protrusions of the first portion and the protrusions of the second portion are staggered.

11. The display device according to claim 10, wherein a height of each of the first portion and the second portion is in range of 0.01 um to 3 um, and a width of each of the first portion and the second portion is in a range of 5 um to 50 um.

12. The display device according to claim 10, wherein a gap is existed between the protrusion of the first portion and the protrusion of the adjacent second portion.

13. The display device according to claim 9, wherein the retaining wall is an integral structure, the retaining wall includes a first portion, a second portion, and a side wall that connects the first portion and the second portion;

the first portion and the second portion are mutually staggered, and the adjacent first portion and the second portion are integrally connected through the side wall to form a saw-tooth closed structure.

14. The display device according to claim 9, wherein the organic light-emitting diode device includes a driving circuit, a planarization layer, a first electrode, a pixel definition layer, and an organic light-emitting structure and a second electrode which are sequentially formed on the substrate.

15. The display device according to claim 14, wherein a material of the retaining wall and a material of the planarization layer and the pixel definition layer are the same, and the first portion and the second portion of the retaining wall are formed in a same mask process as the planarization layer and the pixel definition layer.

16. The display device according to claim 15, wherein the material of each of the retaining wall and the pixel definition layer is one or a combination of an organic material selected from a photoresist, an epoxy resin, a poly(methyl methacrylate) resin, a polyimide resin, an acrylic resin, or one or a combination of an inorganic material of a silicon compound.

17. A manufacturing method for a flexible panel, comprising steps of:

forming a planarization layer and a portion of a retaining wall on a substrate by a same mask;

forming a first electrode pattern on the planarization layer;

forming the pixel definition layer and the other portion of the retaining wall on the planarization layer and the substrate using a same mask, wherein the pixel definition layer correspondingly defines a space of a light-emitting pixel on the planarization layer and the first electrode;

forming an organic light-emitting structure in a region where a light-emitting pixel defined by the pixel definition layer is located;

forming a second electrode on the organic light-emitting structure; and

forming a thin-film encapsulation layer on the substrate to perform an encapsulation.