Display panel and manufacturing method thereof, and display device

1 . A display panel, comprising:

a substrate;

a plurality of organic light emitting elements, which are located on a side of the substrate;

a film encapsulation layer, which is located on a side of the plurality of organic light emitting elements facing away from the substrate; wherein the film encapsulation layer covers the plurality of organic light emitting elements, the film encapsulation layer comprises a first inorganic layer, a lens layer and a second cover layer, the lens layer is located between the first inorganic layer and the second cover layer, and the second covering layer is located on a side of the first inorganic layer facing away from the plurality of organic light emitting elements; wherein the lens layer comprises a plurality of lenses, and

a material of the second cover layer is an inorganic material; the second cover layer comprises a first portion overlapping the plurality of lenses and a second portion not overlapping the plurality of lenses, the first portion of the second cover layer is in direct contact with the plurality of lenses, and the second portion of the second cover layer is in direct contact with the first inorganic layer,

wherein the film encapsulation layer further comprises a first cover layer, wherein the first cover layer is located on a side of the second cover layer facing away from the plurality of organic light emitting elements, and covers an entire upper surface of the second cover layer;

a material of the first cover layer is an organic material; and

a refractive index of the lens layer is M, a refractive index of the first cover layer is N, and a refractive index of the second cover layer is P, wherein N<P<M.

2 . The display panel of claim 1 , wherein a surface of each of the plurality of lenses facing away from the organic light emitting elements is convex towards a side facing away from the plurality of organic light emitting elements.

3 . The display panel of claim 1 , wherein the plurality of lenses overlaps with the plurality of organic light emitting elements.

4 . The display panel of claim 1 , wherein the display panel further comprises a touch function layer, which is located on a side of the film encapsulation layer facing away from the plurality of organic light emitting elements;

the film encapsulation layer further comprises a second inorganic layer;

the second inorganic layer is located on a side of the first cover layer facing away from the plurality of organic light emitting elements; and

the touch function layer is in contact with the second inorganic layer.

5 . The display panel of claim 1 , wherein the display panel further comprises a touch function layer, which is located on a side of the film encapsulation layer facing away from the plurality of organic light emitting elements; and

the touch function layer is in contact with the first cover layer.

6 . A method of manufacturing the display panel according to claim 1 , comprising:

providing a substrate;

forming a plurality of organic light emitting elements on the substrate located on a side of the substrate; and

forming a film encapsulation layer, wherein the film encapsulation layer covers the plurality of organic light emitting elements;

wherein forming the film encapsulation layer comprises:

forming a first inorganic layer, wherein the first inorganic layer covers the plurality of organic light emitting elements,

forming a lens layer, wherein the lens layer is in contact with the first inorganic layer, and is located on a side of the first inorganic layer facing away from the plurality of organic light emitting elements, and the lens layer comprises a plurality of lenses; and

forming a second cover layer on a side of the lens layer facing away from the plurality of organic light emitting elements, wherein a material of the second cover layer is an inorganic material, the second cover layer comprises a first portion overlapping the plurality of lenses and a second portion not overlapping the plurality of lenses, the first portion of the second cover layer is in direct contact with the plurality of lenses, and the second portion of the second cover layer is in direct contact with the first inorganic layer, and

forming a first cover layer on a side of the second cover layer facing away from the plurality of organic light emitting elements, wherein the first cover layer covers an entire upper surface of the second cover layer, and a material of the first cover layer is an organic material; and a refractive index of the lens layer is M, a refractive index of the first cover layer is N, and a refractive index of the second cover layer is P, wherein N<P<M.

7 . The method of manufacturing of claim 6 , wherein forming the lens layer comprises:

forming the lens layer by using an inkjet printing process or a photolithography process.

8 . The method of manufacturing of claim 7 , wherein

the lens layer is formed by using an inkjet printing process, wherein in the inkjet printing process, each droplet used for printing has a same volume;

wherein before forming the lens layer, the method further comprises:

the first inorganic layer comprises a first surface facing away from the plurality of organic light emitting elements, the first surface is subjected to a hydrophobization or hydrophilization treatment, the first surface after the hydrophobization or hydrophilization treatment comprises a first portion, a second portion and a third portion, and both the first portion and the second portion have higher hydrophobicity than the third portion;

wherein a lens in contact with the first portion is a first lens, a lens in contact with the second portion is a second lens, and a lens in contact with the third portion is a third lens, a contact angle of the first lens and the first inorganic layer is α, a contact angle of the second lens and the first inorganic layer is β, and a contact angle of the third lens and the first inorganic layer is γ, wherein α>γ, β>γ;

the plurality of organic light emitting elements comprise a red organic light emitting element, a green organic light emitting element, and a blue organic light emitting element, the red organic light emitting element overlaps the first lens, the green organic light emitting element overlaps the second lens, and the blue organic light emitting element overlaps the third lens.

9 . The method of manufacturing of claim 6 , wherein

forming the first inorganic layer comprises:

forming the first inorganic layer by using a chemical vapor deposition process or an atomic layer deposition process;

forming the second cover layer comprises:

forming the second cover layer by using a chemical vapor deposition process.

10 . The method of manufacturing of claim 6 , wherein after forming the film encapsulation layer, the method further comprises:

forming a touch function layer, the touch function layer is located on a side of the film encapsulation layer facing away from the plurality of organic light emitting elements, and the touch function layer is in contact with the first cover layer.

11 . The method of manufacturing of claim 6 , wherein forming the film encapsulation layer further comprises:

forming a second inorganic layer on a side of the first cover layer facing away from the plurality of organic light emitting elements by using a chemical vapor deposition process after forming the first cover layer, wherein the second inorganic layer covers the first cover layer; wherein after forming the film encapsulation layer, the method further comprises:

forming a touch function layer on a side of the film encapsulation layer facing away from the plurality of organic light emitting elements, wherein the touch function layer is in contact with the second inorganic layer of the film encapsulation layer.

12 . A display device, comprising the display panel of claim 1 .