Pixel structure, OLED display screen and evaporation mask

A pixel structure, comprising a plurality of pixel unit groups arranged in an array, wherein

• each of the pixel unit groups comprises a first sub-pixel, a second sub-pixel and a third sub-pixel;
• an edge of the first sub-pixel close to the third sub-pixel is not parallel to an edge of the first sub-pixel away from the third sub-pixel, and an edge of the second sub-pixel close to the third sub-pixel is not parallel to an edge of the second sub-pixel away from the third sub-pixel;
• at least two adjacent first sub-pixels and/or at least two adjacent second sub-pixels of at least two adjacent pixel unit groups are formed by a same mask opening in an evaporation mask;
• wherein the first sub-pixel and the second sub-pixel in each of the pixel unit groups are arranged around the third sub-pixel, and the third sub-pixels in the pixel unit groups of adjacent rows are arranged in a staggered manner.

A pixel structure, comprising a plurality of pixel unit groups arranged in an array, wherein

• each of the pixel unit groups comprises a first sub-pixel, a second sub-pixel and a third sub-pixel;
• an edge of the first sub-pixel close to the third sub-pixel is not parallel to an edge of the first sub-pixel away from the third sub-pixel, and an edge of the second sub-pixel close to the third sub-pixel is not parallel to an edge of the second sub-pixel away from the third sub-pixel;
• at least two adjacent first sub-pixels and/or at least two adjacent second sub-pixels of at least two adjacent pixel unit groups are formed by a same mask opening in an evaporation mask;
• wherein the first sub-pixel and the second sub-pixel in each of the pixel unit groups are arranged around the third sub-pixel, the third sub-pixels in the pixel unit groups of adjacent rows are arranged in an aligned manner, and two adjacent pixel unit groups in a column and/or row direction are symmetrically distributed with respect to the boundary therebetween.

An evaporation mask, wherein the evaporation mask is configured to form a pixel structure, comprising:

• a plurality of pixel unit groups arranged in an array, wherein each of the pixel unit groups comprises a first sub-pixel, a second sub-pixel and a third sub-pixel;
• an edge of the first sub-pixel close to the third sub-pixel is not parallel to an edge of the first sub-pixel away from the third sub-pixel, and an edge of the second sub-pixel close to the third sub-pixel is not parallel to an edge of the second sub-pixel away from the third sub-pixel;
• and at least two adjacent first sub-pixels and/or at least two adjacent second sub-pixels of at least two adjacent pixel unit groups are formed by a same mask opening in an evaporation mask, and the evaporation mask comprises a plurality of mask openings,
• wherein the mask opening of the evaporation mask is a polygon formed by combining at least two right-angled trapezoids.