Display substrate having light processing structure for reducing optical crosstalk of adjacent sub-pixel units and display device

A display substrate, comprising:

• a substrate;
• a plurality of pixel units at a side of the substrate, wherein each of the plurality of pixel units comprises:
• a plurality of sub-pixel units;
• a color filter layer at a light emergent side of the plurality of pixel units, wherein the color filter layer comprises:
• a plurality of color filter units, arranged in one-to-one correspondence to the plurality of sub-pixel units, wherein the plurality of color filter units are closely arranged;
• a light processing structure comprising a first light processing structure and a second light processing structure, wherein an orthographic projection of the light processing structure on the substrate covers a junction of the color filter units of different colors;
• and
• a cover plate at a side of the color filter layer facing away from the substrate;
• wherein the light processing structure is configured to prevent light rays, emitted from the plurality of sub-pixel units and having an angle greater than a critical angle of total reflection of the cover plate, from being emitted from the cover plate;
• the first light processing structure and the second light processing structure are arranged on a surface of the cover plate respectively, and an orthographic projection of the first light processing structure on the substrate overlaps an orthographic projection of the second light processing structure on the substrate;
• and
• the first light processing structure is configured to absorb light rays having a long axis parallel to a first direction, and the second light processing structure is configured to absorb light rays having a long axis parallel to a second direction, wherein the first direction is perpendicular to the second direction.