Display substrate, display panel and display device

A display panel, comprising:

• a display substrate, an opposite substrate opposite to the display substrate, and a liquid crystal layer between the display substrate and the opposite substrate;
• wherein the display panel is provided with a display region and a dummy region surrounding the display region;
• wherein the opposite substrate comprises:
• a first base substrate;
• and
• a black matrix arranged on a side of the first base substrate facing the liquid crystal layer;
• wherein the black matrix comprises a first black matrix strip extending along a first direction and a second black matrix strip extending along a second direction, wherein the first black matrix strip and the second black matrix strip are located in the display region, the first black matrix strip and the second black matrix strip comprise a widened portion at an overlapping position where the first black matrix strip and the second black matrix strip overlap with each other, and the first direction intersects with the second direction.