Display panel comprising black matrix and color resists along with angled low-refractivity layer and display device comprising the same

1. A display panel comprising:

a filter layer, wherein the filter layer comprises a black matrix and a plurality of color resists, the black matrix is provided with a plurality of first openings, the plurality of color resists are respectively arranged in the plurality of first openings, the plurality of color resists comprise a first color resist and a second color resist which is of a color different from a color of the first color resist, and a thickness of the first color resist is greater than a thickness of the second color resist; and

a low-refractivity layer, wherein the low-refractivity layer is provided with a plurality of second openings, the low-refractivity layer is in contact with the plurality of color resists, the low-refractivity layer comprises a first part that is overlapped with the first color resist and a second part that is overlapped with the second color resist, a bottom angle of the first part adjacent to the first color resist is a first angle, a bottom angle of the second part adjacent to the second color resist is a second angle, and the first angle is different from the second angle.

2. The display panel according to claim 1 , further comprising:

an array substrate; and

a light-emitting unit layer arranged on the array substrate, wherein the light-emitting unit layer comprises a pixel definition layer and a plurality of light-emitting units, the pixel definition layer is provided with a plurality of pixel openings, and the plurality of light-emitting units are respectively arranged in the plurality of pixel openings;

wherein:

the filter layer is arranged on a side of the light-emitting unit layer which faces away from the array substrate,

the low-refractivity layer is arranged on a side of the filter layer which faces away from the array substrate, and

in a first direction, a pixel opening of the plurality of pixel openings, a first opening of the plurality of first openings and a second opening of the plurality of second openings are overlapped with each other, and the first direction is perpendicular to the array substrate.

3. The display panel according to claim 2 , further comprising a high-refractivity layer arranged on a side of the low-refractivity layer which faces away from the array substrate, wherein

the high-refractivity layer covers the low-refractivity layer and is in contact with the low-refractivity layer; and

a refractive index of the high-refractivity layer is greater than a refractive index of the low-refractivity layer.

4. The display panel according to claim 1 , wherein

a thickness of the first part is less than a thickness of the second part.

5. The display panel according to claim 4 , wherein

the first angle and the second angle satisfy conditions that:

the first angle is greater than the second angle, and the first angle is less than or equal to a boundary angle; or

the first angle is less than the second angle, and the first angle is greater than or equal to the boundary angle.

6. The display panel according to claim 5 , wherein

in a case that a bottom angle of the low-refractivity layer adjacent to a corresponding one of the plurality of color resists is equal to the boundary angle, an increment of light-emitting efficiency of the display panel at the corresponding one of the plurality of color resists is at a maximum.

7. The display panel according to claim 6 , wherein

the boundary angle is 55°.

8. The display panel according to claim 1 , wherein

the first color resist is a red color resist and the second color resist is at least one of a blue color resist and a green color resist.

9. The display panel according to claim 2 , wherein

the display panel comprises a display region, the display region comprises a first area and a second area;

the display panel further comprises a thin film packaging layer, and the thin film packaging layer is arranged between the light-emitting unit layer and the filter layer;

a thickness of the thin film packaging layer in the first area is greater than a thickness of the thin film packaging layer in the second area;

a thickness of a first color resist arranged in the first area is less than a thickness of a first color resist arranged in the second area; and

a thickness of a second color resist arranged in the first area is less than a thickness of a second color resist arranged in the second area.

10. The display panel according to claim 9 , wherein

in the first area, the first angle and the second angle satisfy conditions that:

the first angle is greater than the second angle, and the first angle is less than or equal to a boundary angle; or the first angle is less than the second angle, and the first angle is greater than or equal to the boundary angle;

in the second area, the first angle and the second angle satisfy conditions that:

the first angle is greater than the second angle, and the first angle is less than or equal to the boundary angle; or, the first angle is less than the second angle, and the first angle is greater than or equal to the boundary angle; and

in the first area, an absolute value of a difference between the first angle and the boundary angle is a first difference; in the second area, an absolute value of a difference between the first angle and the boundary angle is a second difference; and the first difference is greater than the second difference.

11. The display panel according to claim 2 , further comprising an outer insulation layer arranged between the light-emitting unit layer and the filter layer; wherein

the outer insulation layer comprises a convex part corresponding to the second color resist.

12. The display panel according to claim 11 , wherein

a surface of the first color resist which faces away from the array substrate is aligned with a surface of the second color resist which faces away from the array substrate.

13. The display panel according to claim 12 , further comprising:

a thin film packaging layer arranged between the light-emitting unit layer and the filter layer;

a touch electrode layer arranged on a side of the thin film packaging layer which faces away from the array substrate, wherein the touch electrode layer comprises a plurality of touch electrodes; and

the outer insulation layer arranged on a side of the touch electrode layer which faces away from the array substrate.

14. The display panel according to claim 13 , wherein

the thin film packaging layer comprises a first inorganic layer, an organic layer and a second inorganic layer that are sequentially stacked in a direction from the array substrate to the filter layer.

15. The display panel according to claim 2 , wherein

a spacing between a contour line of an orthographic projection of the second opening on the array substrate and a contour line of an orthographic projection of the pixel opening on the array substrate is a reference spacing,

the reference spacing corresponding to the first part is a first reference spacing, the reference spacing corresponding to the second part is a second reference spacing, and the first reference spacing is different from the second reference spacing.

16. The display panel according to claim 15 , wherein

the first reference spacing is less than the second reference spacing.

17. The display panel according to claim 2 , wherein

a contour line of an orthographic projection of the pixel opening on the array substrate is outside a contour line of an orthographic projection of the second opening on the array substrate.

18. The display panel according to claim 1 , wherein

the thickness of the first color resist is greater than a thickness of the black matrix.

19. A display panel comprising:

an array substrate;

a light-emitting unit layer arranged on the array substrate, wherein the light-emitting unit layer comprises a pixel definition layer and a plurality of light-emitting units, the pixel definition layer is provided with a plurality of pixel openings, and the plurality of light-emitting units are respectively arranged in the plurality of pixel openings;

a filter layer arranged on a side of the light-emitting unit layer which faces away from the array substrate, wherein the filter layer comprises a black matrix and a plurality of color resists, the black matrix is provided with a plurality of first openings, the plurality of color resists are respectively arranged in the plurality of first openings, the plurality of color resists comprise a first color resist and a second color resist which is of a color different from a color of the first color resist, a thickness of the first color resist is greater than a thickness of the second color resist, and a surface of the first color resist which faces away from the array substrate is aligned with a surface of the second color resist which faces away from the array substrate; and

a low-refractivity layer arranged on a side of the filter layer which faces away from the array substrate, wherein the low-refractivity layer is provided with a plurality of second openings, the low-refractivity layer is in contact with the plurality of color resists, the low-refractivity layer comprises a first part that is overlapped with the first color resist and a second part that is overlapped with the second color resist in a first direction, a bottom angle of the first part adjacent to the first color resist is a first angle, a bottom angle of the second part adjacent to the second color resist is a second angle, and the first angle is equal to the second angle, wherein

in the first direction, a pixel opening of the plurality of pixel openings, the first opening and the second opening are overlapped with each other; and

the first direction is perpendicular to the array substrate.

20. A display device comprising a display panel, wherein the display panel comprises:

a filter layer, wherein the filter layer comprises a black matrix and a plurality of color resists, the black matrix is provided with a plurality of first openings, the plurality of color resists are respectively arranged in the plurality of first openings, the plurality of color resists comprise a first color resist and a second color resist which is of a color different from a color of the first color resist, and a thickness of the first color resist is greater than a thickness of the second color resist; and

a low-refractivity layer, wherein the low-refractivity layer is provided with a plurality of second openings, the low-refractivity layer is in contact with the plurality of color resists, the low-refractivity layer comprises a first part that is overlapped with the first color resist and a second part that is overlapped with the second color resist, a bottom angle of the first part adjacent to the first color resist is a first angle, a bottom angle of the second part adjacent to the second color resist is a second angle, and the first angle is different from the second angle.