Display substrate and manufacturing method thereof, display device

1. A display substrate, comprising:

a base substrate;

a plurality of pixel groups, located on the base substrate, wherein each of the pixel groups comprises two pixel units, each of the pixel groups comprises a common electrode, the common electrode comprises two opaque first common electrode strips extending in a first direction, and a second common electrode strip located between the two opaque first common electrode strips;

a first shading portion, located between the plurality of pixel groups and the base substrate, the first shading portion extends in the first direction,

wherein an orthogonal projection of a space between the two opaque first common electrode strips on the base substrate entirely falls within an orthogonal projection of the first shading portion on the base substrate.

2. The display substrate according to claim 1 , wherein in a direction from close to the second common electrode strip to away from the second common electrode strip, a vertical distance from the two opaque first common electrode strips to the base substrate gradually decreases, and a side of the two opaque first common electrode strips facing the base substrate is a reflective surface.

3. The display substrate according to claim 1 , wherein the plurality of pixel groups comprise:

an interlayer dielectric layer, located on the first shading portion, a section of the interlayer dielectric layer is a trapezoid, the two opaque first common electrode strips are respectively located on two waists of the trapezoid.

4. The display substrate according to claim 3 , wherein the interlayer dielectric layer comprises a color filter layer.

5. The display substrate according to claim 1 , wherein a ratio of a sum of sizes of the two opaque first common electrode strips in a second direction perpendicular to the first direction to a size of the plurality of pixel groups in the second direction is in a range of 40% to 60%, and the second direction is parallel to the base substrate.

6. The display substrate according to claim 1 , further comprising:

a data line, extending in the first direction, and there is a space between the data line and the first shading portion in a second direction perpendicular to the first direction, wherein in a direction perpendicular to the base substrate, an edge of the data line close to the first shading portion is aligned with an edge of the two opaque first common electrode strips away from the second common electrode strip or the data line overlaps with the two opaque first common electrode strips, the second direction is parallel to the base substrate.

7. The display substrate according to claim 6 , wherein the first shading portion is on a same layer as the data line.

8. The display substrate according to claim 6 , further comprising:

a gate line extending in the second direction, and the first shading portion is on a same layer as the gate line.

9. The display substrate according to claim 8 , further comprising:

a second shading portion, disposed on a same layer as the data line, and an orthogonal projection of the second shading portion on the base substrate falls within the orthogonal projection of the first shading portion on the base substrate.

10. The display substrate according to claim 9 , wherein a material of the first shading portion and a material of the second shading portion comprise a conductive material, and the first shading portion is electrically connected to the second shading portion, the first shading portion is electrically connected to the common electrode.

11. The display substrate according to claim 1 , wherein each of the pixel groups further comprises a pixel electrode disposed in a same layer as the common electrode, the pixel electrode is located between the two opaque first common electrode strips and the second common electrode strip.

12. The display substrate according to claim 1 , wherein the two pixel units of each of the pixel groups are symmetrically distributed with respect to a centerline of the second common electrode along the first direction.

13. A manufacturing method of a display substrate, comprising:

forming a first shading portion extending in a first direction on a base substrate;

forming a plurality of pixel groups on a side of the first shading portion away from the base substrate, each of the pixel groups comprises two pixel units, each of the pixel groups comprises a common electrode, the common electrode comprises two opaque first common electrode strips extending in the first direction, and a second common electrode strip located between the two opaque first common electrode strips,

wherein an orthogonal projection of a space between the two opaque first common electrode strips on the base substrate entirely falls within an orthogonal projection of the first shading portion on the base substrate.

14. The manufacturing method of the display substrate according to claim 13 , wherein forming the plurality of pixel groups comprises:

forming an interlayer dielectric layer with a sectional shape of trapezoid on the first shading portion,

wherein the two opaque first common electrode strips are respectively formed on two waists of the trapezoid.

15. The manufacturing method of the display substrate according to claim 13 , further comprising:

forming a second shading portion on the first shading portion so that an orthogonal projection of the second shading portion on the base substrate falls within the orthogonal projection of the first shading portion on the base substrate.

16. A display device, comprising the display substrate according to claim 1 .