Pixel layout structure, metal mask, and display apparatus

A pixel layout structure, comprising a plurality of first sub-pixels, a plurality of second sub-pixels, and a plurality of third sub-pixel, arranged as:

• a plurality of first repeat units, each comprising a first sub-pixel and a second sub-pixel;
• and
• a plurality of second repeat units, each comprising a third sub-pixel and a second sub-pixel;
• wherein:
• the plurality of first repeat units and the plurality of second repeat units are alternately arranged along a first direction and a second direction intersecting with the first direction;
• the plurality of second sub-pixels are arranged in a matrix along the first direction and the second direction;
• every four second sub-pixels surround one first sub-pixel or one third sub-pixel;
• and
• the plurality of first sub-pixels and the plurality of third sub-pixels are alternately arranged in the first direction and the second direction.