Display panel and display device

A display panel, comprising:

• a plurality of sub-pixel units disposed on a first base substrate, wherein the plurality of sub-pixel units comprises a first sub-pixel unit and a second sub-pixel unit, and a size of an opening region of the first sub-pixel unit along a first direction is greater than a size of an opening region of the second sub-pixel unit along the first direction;
• wherein at least one of the sub-pixel units comprises a first electrode disposed on the first base substrate, the first electrode is provided with at least one slit extending along the first direction, and an orthographic projection of the slit on the first base substrate is located within a range of an orthographic projection of the opening region of the sub-pixel unit on the first base substrate;
• wherein a size of the slit in the first sub-pixel unit along a second direction is smaller than a size of the slit in the second sub-pixel unit along the second direction, and the second direction intersects the first direction;
• wherein the at least one of the sub-pixel units further comprises a black matrix disposed on a side of the first electrode away from the first base substrate;
• wherein the black matrix comprises a first light-shielding portion and a second light-shielding portion that are arranged in a third direction, and a third light-shielding portion located between the first light-shielding portion and the second light-shielding portion, wherein the opening region of the sub-pixel unit is defined by the first light-shielding portion, the second light-shielding portion and the third light-shielding portion define the opening region of the sub-pixel unit;
• and
• wherein a size of the third light-shielding portion of the first sub-pixel unit along a fourth direction is greater than a size of the third light-shielding portion of the second sub-pixel unit along the fourth direction, wherein the fourth direction intersects the third direction.