Manufacturing method for display panel, display panel and display device

Patent metadata

Field	Value
Publication number	US-12016205-B2
Application number	US-202117458193-A
Country	US
Kind code	B2
Filing date	Aug 26, 2021
Priority date	Oct 15, 2020
Publication date	Jun 18, 2024
Grant date	Jun 18, 2024

Abstract

The application provides a manufacturing method for a display panel, a display panel, and a display device. The manufacturing method includes: providing a substrate; forming a driving circuit layer on the substrate; forming a planarization layer on the side of the driving circuit layer facing away from the substrate; forming a composite material layer on the side of the planarization layer facing away from the substrate with a polymerization-induced phase separation method to the composite material layer including a polymer and liquid crystal phase molecules dispersed in the polymer; removing the liquid crystal phase molecules in the composite material layer to obtain an auxiliary structure layer, the side of the auxiliary structure layer facing away from the substrate having a plurality of protrusion structures; and forming a pixel structure on the side of the auxiliary structure layer facing away from the substrate, wherein the auxiliary structure layer makes the pixel structure uneven, and the pixel structure includes a first electrode, an organic light emitting material, and a second electrode that are sequentially formed on the side of the auxiliary structure layer facing away from the substrate.

First claim

What is claimed is:

1. A manufacturing method for a display panel, comprising:
providing a substrate;
forming a driving circuit layer on the substrate;
forming a planarization layer on the side of the driving circuit layer facing away from the substrate;
forming a composite material layer on the side of the planarization layer facing away from the substrate with a polymerization-induced phase separation method to the composite material layer comprising a polymer and liquid crystal phase molecules dispersed in the polymer;
removing the liquid crystal phase molecules in the composite material layer to obtain an auxiliary structure layer, the side of the auxiliary structure layer facing away from the substrate having a plurality of protrusion structures; and
forming a pixel structure on the side of the auxiliary structure layer facing away from the substrate, wherein the auxiliary structure layer makes the pixel structure uneven, and the pixel structure comprises a first electrode, an organic light emitting material, and a second electrode that are sequentially formed on the side of the auxiliary structure layer facing away from the substrate.

2. The manufacturing method for a display panel of claim 1 , wherein forming a composite material layer on the side of the planarization layer facing away from the substrate with a polymerization-induced phase separation method comprises:
coating a mixture of liquid crystal phase molecules and polymer monomers on the planarization layer; and
initiating a polymerization reaction of the polymer monomers, to generate a plurality of microsphere structures of a material of polymer, wherein the liquid crystal phase molecules are dispersed in gaps among the microsphere structures to obtain the composite material layer including the plurality of microsphere structures and the liquid crystal phase molecules.

3. The manufacturing method for a display panel of claim 2 , wherein the polymer monomers are ultraviolet polymer monomers, and initiating a polymerization reaction of the polymer monomers, to generate a plurality of microsphere structures of a material of polymer comprises:
irradiating the mixture with ultraviolet light to polymerize the ultraviolet polymer monomers to form a plurality of microsphere structures.

4. The manufacturing method for a display panel of claim 2 , wherein the polymer monomers are thermally polymer monomers, and initiating a polymerization reaction of the polymer monomers, to generate a plurality of microsphere structures of a material of polymer comprises:
heating the mixture to polymerize the thermally polymer monomers to form a plurality of microsphere structures.

5. The manufacturing method for a display panel of claim 2 , wherein in the mixture of the liquid crystal phase molecules and the polymer monomers, a mass fraction of the liquid crystal phase molecules is in the range of 50%˜80%.

6. The manufacturing method for a display panel of claim 1 , wherein the auxiliary structure layer comprises a plurality of microsphere structures, and a size of the microsphere structure ranges from 100 nm to 2000 nm.

7. The manufacturing method for a display panel of claim 1 , wherein in the auxiliary structure layer, the maximum thickness of the protrusion structure ranges from 20 nm to 400 nm.

8. The manufacturing method for a display panel of claim 1 , wherein the liquid crystal phase molecules are liquid crystal molecules.

9. The manufacturing method for a display panel of claim 1 , wherein the liquid crystal phase molecules are made of organic material, and removing the liquid crystal phase molecules in the composite material layer comprises:
immersing the composite material layer in an organic solvent, or spraying the composite material layer with an organic solvent, so that the liquid crystal phase molecules are dissolved in the organic solvent.

10. The manufacturing method for a display panel of claim 1 , wherein the first electrode is a reflective electrode, and the second electrode is a light transmitting electrode; or, the first electrode is a light transmitting electrode, and the second electrode is a reflective electrode.

11. A display panel manufactured by the method of claim 1 comprising:
a substrate;
a driver circuit layer over the substrate-e;
a planarization layer on the side of the driver circuit facing away from the substrate;
an auxiliary structure layer on the side of the planarization layer facing away from the substrate, the auxiliary structure layer having a plurality of protrusion structures on the side of the auxiliary structure layer facing away from the substrate; and
a pixel structure on the side of the auxiliary structure layer facing away from the substrate, wherein the auxiliary structure layer makes the pixel structure uneven, and the pixel structure comprises a first electrode, an organic light emitting material, and a second electrode that are sequentially formed on the side of the auxiliary structure layer facing away from the substrate.

12. The display panel of claim 11 , wherein the auxiliary structure layer is formed by polymerizing polymer monomers to form a plurality of microsphere structures, filling the gaps among the microsphere structures with liquid crystal phase molecules to form protrusion structures, and finally removing the liquid crystal phase molecules.

13. The display panel of claim 11 , wherein the material of the auxiliary structure layer is at least one of an olefin monomer and a mercaptan monomer or at least one of an epoxy monomer and a thiol monomer.

14. The display panel of claim 11 , wherein the auxiliary structure layer comprises a plurality of microsphere structures, and the plurality of microsphere structures are gathered together to form at least one microsphere aggregation layer, and the exposed part of the uppermost microsphere aggregation layer forms the plurality of protrusion structures.

15. The display panel of claim 11 , wherein the size of the microsphere structure ranges from 100 nm to 2000 nm.

16. The display panel of claim 11 , wherein the protrusion structure is hemispherical.

17. The display panel of claim 11 , wherein the maximum thickness of the protrusion structures ranges from 20 nm to 400 nm.

18. A display device comprising:
a display panel of claim 11 ; and
a housing, wherein the display panel is embedded in the housing.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Han Cheng
• Li Xin
• Fan Xing
• Wu Songquan
• Sun Meng
• Li Erli

Classifications

• H10K59/875

  Arrangements for extracting light from the devices · CPC title

• H10K59/80515

  characterised by their shape · CPC title

• H10K59/121 Primary

  characterised by the geometry or disposition of pixel elements · CPC title

• H10K59/124 Primary

  Insulating layers formed between TFT elements and OLED elements · CPC title

• H10K59/1201

  Manufacture or treatment · CPC title