Display panel and display device

1 . A display panel, wherein a display area of the display panel comprises a first sub-display area, a second sub-display area surrounding at least a part of the first sub-display area, and a third sub-display area surrounding at least a part of the second sub-display area; a side of the first sub-display area away from a display surface is configured to carry a sensing element for sensing light;

the display panel comprises:

a substrate;

a plurality of sub-pixels, arranged in the display area on a side of the substrate;

a light-shielding layer arranged on a side of the sub-pixels away from the substrate, wherein the light-shielding layer comprises a light-shielding structure and first openings, and the first openings are in one-to-one correspondence with the sub-pixels; and

color film units, arranged corresponding to the first openings, wherein each color film unit is located at a corresponding one of the first openings, and at least a part of the color film unit is arranged to cover the light-shielding structure;

wherein:

a proportion of the light-shielding structure covered with the color film units in the second sub-display area is smaller than a proportion of the light-shielding structure covered with the color film units in the third sub-display area; and/or,

a thickness of the color film units in the second sub-display area is smaller than a thickness of the color film units in the third sub-display area.

2 . The display panel according to claim 1 , wherein a density of the sub-pixels in the second sub-display area is the same as a density of the sub-pixels in the third sub-display area; for sub-pixels emitting light of same color, the sub-pixel in the second sub-display area is smaller than that in the third sub-display area;

wherein within the unit area, the area of the light-shielding structure in the second sub-display area is larger than the area of the light-shielding structure in the third sub-display area.

3 . The display panel according to claim 1 , wherein in the second sub-display area, between two of the first openings that are adjacent to each other, at least a part of the light shielding structure does not overlap with the color film unit in a direction perpendicular to the display panel.

4 . The display panel according to claim 1 , wherein in the third sub-display area, the color film unit is arranged to entirely cover the light-shielding structure between two adjacent first openings in a direction perpendicular to the display panel.

5 . The display panel according to claim 1 , further comprising a first sub-pixel that emits light of a first primary color;

the color film units comprise a first color film unit facing the first sub-pixel;

within the unit area, the first color film unit arranged in the second sub-display area covers the light-shielding structure with a first coverage area, and the first color film unit arranged in the third sub-display area covers the light-shielding structure with a second coverage area, and the first coverage area is smaller than the second coverage area.

6 . The display panel according to claim 1 , wherein the display panel comprises a first sub-pixel and a second sub-pixel each emitting light of a different color; the color film units comprise a first color film unit facing the first sub-pixel and a second color film unit facing the second sub-pixel;

in the second sub-display area, within the unit area, a first difference exists between a coverage of the first color film unit on the light-shielding structure and a coverage of the second color film unit on the light-shielding structure;

in the third sub-display area, within the unit area, a second difference exists between a coverage of the first color film unit on the light-shielding structure and a coverage of the second color film unit on the light-shielding structure;

wherein the first difference is not equal to the second difference.

7 . The display panel according to claim 1 , wherein the display panel comprises a first sub-pixel and a second sub-pixel each emitting light of a different color; the color film units comprise a first color film unit facing the first sub-pixel and a second color film unit facing the second sub-pixel;

in the third sub-display area, within the unit area, a coverage of the first color film unit on the light-shielding structure is larger than a coverage of the second color film unit on the light-shielding structure;

wherein the first sub-pixel is a sub-pixel that emits red light.

8 . The display panel according to claim 1 , wherein the display panel comprises a first sub-pixel and a second sub-pixel each emitting light of a different color; and the color film units comprise a first color film unit facing the first sub-pixel and a second color film unit facing the second sub-pixel;

in the second sub-display area, within the unit area, a coverage of the first color film unit on the light-shielding structure is larger than a coverage of the second color film unit on the light-shielding structure;

wherein the second sub-pixel is a sub-pixel that emits green light.

9 . The display panel according to claim 3 , wherein in the second sub-display area, a width of a portion where the color film unit covers the light-shielding structure is 2 μm to 6 μm in a direction parallel to a plane of the light-shielding layer;

wherein the width is a distance from an edge of a portion of the color film unit that extends beyond the first opening where the color film unit is located.

10 . The display panel according to claim 1 , wherein a through hole is arranged in the second sub-display area to penetrate through the light-shielding structure.

11 . The display panel according to claim 10 , wherein the through hole does not overlap with the color film unit in a direction perpendicular to the display panel.

12 . The display panel according to claim 11 , wherein an orthographic projection area of the through hole on the substrate is 20 μm 2 to 50 μm 2 .

13 . The display panel according to claim 10 , wherein the color film unit is arranged to cover the through hole in a direction perpendicular to the display panel, and the color film unit is arranged to fill the through hole.

14 . The display panel according to claim 13 , wherein an orthographic projection area of the through hole on the substrate is 400 μm 2 to 600 μm 2 .

15 . The display panel according to claim 1 , wherein for the sub-pixel that emits light of any color and the first opening and the color film unit corresponding to the sub-pixel, in the second sub-display area, the color film unit is projected on the substrate with a first vertical projection, the first opening is projected on the substrate with a second vertical projection, and the sub-pixel is projected on the substrate with a third vertical projection;

the first vertical projection, the second vertical projection and the third vertical projection are all in a form of a similar geometry; the first vertical projection, the second vertical projection and the third vertical projection have their centers coincide with one another, and their areas decrease sequentially.

16 . The display panel according to claim 1 , wherein in the second sub-display area, the color film units in at least some first openings each comprise a second opening.

17 . The display panel according to claim 1 , wherein at least two of the first openings corresponding to the sub-pixels out of the sub-pixels that emit light of the same color have different shapes and/or sizes.

18 . The display panel according to claim 17 , wherein in the first sub-display area, the at least two of the first openings corresponding to the sub-pixels out of the sub-pixels that emit light of the same color have different shapes.

19 . The display panel according to claim 17 , wherein in the second sub-display area, at least two of the first openings corresponding to the sub-pixels out of the sub-pixels that emit light of the same color have different sizes.

20 . A display device, comprising:

a display panel; and

a sensing element for sensing light,

wherein:

a display area of the display panel comprises a first sub-display area, a second sub-display area surrounding at least a part of the first sub-display area, and a third sub-display area surrounding at least a part of the second sub-display area;

the display panel comprises:

a substrate;

a plurality of sub-pixels, arranged in the display area on a side of the substrate;

a light-shielding layer arranged on a side of the sub-pixels away from the substrate, wherein the light-shielding layer comprises a light-shielding structure and first openings, and the first openings are in one-to-one correspondence with the sub-pixels; and

color film units, arranged corresponding to the first openings, wherein each color film unit is located at a corresponding one of the first openings, and at least a part of the color film unit is arranged to cover the light-shielding structure;

wherein:

a proportion of the light-shielding structure covered with the color film units in the second sub-display area is smaller than a proportion of the light-shielding structure covered with the color film units in the third sub-display area; and/or,

a thickness of the color film units in the second sub-display area is smaller than a thickness of the color film units in the third sub-display area;

wherein the sensing element is arranged on a side of the display panel away from a display surface and opposite to the first sub-display area of the display panel.