Sub-pixel arrangement structure, mask device, and display device

A sub-pixel arrangement structure, comprising:

• a reference sub-pixel array, a plurality of third sub-pixels, and a plurality of fourth sub-pixels, wherein
• the reference sub-pixel array comprises:
• first sub-pixels and second sub-pixels, both of which are arranged alternately in a first direction and a second direction;
• in at least one of the first and second directions, one of the third sub-pixels is arranged between one of the first sub-pixels and one of the second sub-pixels adjacent to the one of the first sub-pixels, in the reference sub-pixel array;
• and
• one of the fourth sub-pixels is arranged among four sub-pixels arranged in two rows and two columns in the reference sub-pixel array, the four sub-pixels comprise two of the first sub-pixels and two of the second sub-pixels;
• and a center of the one of the fourth sub-pixels is located between two rows of sub-pixels of the four sub-pixels arranged in two rows and two columns;
• and
• wherein orthographic projections of the first and second sub-pixels on the substrate approximately have a shape of an octagon;
• orthographic projections of the third sub-pixels on the substrate approximately have a shape of a rectangle;
• and orthographic projections of the fourth sub-pixels on the substrate approximately have a shape of a hexagon;
• wherein the octagon comprises two sides having an angle of less than 3 degrees with the first direction, and two sides having an angle of less than 3 degrees with the second direction;
• the rectangle comprises two sides having an angle of less than 3 degrees with the first direction, and two sides having an angle of less than 3 degrees with the second direction;
• and the hexagon comprises two sides having an angle of less than 3 degrees with the first direction;
• and
• wherein the fourth sub-pixels and the first sub-pixels are alternately arranged in a third direction;
• the fourth sub-pixels and the second sub-pixels are arranged alternately in the third direction;
• and the third direction is intersected with both the first and second directions;
• for each type of the first and second sub-pixels, a size of the sub-pixels in the second direction is larger than the size of the sub-pixels in the first direction;
• and the third sub-pixels are located between adjacent first and the second sub-pixels only in the first direction;
• the third sub-pixels and the fourth sub-pixels are arranged alternately in the second direction;
• a size of the third sub-pixels is smaller than a size of the fourth sub-pixels in the first and second directions, and the size of the fourth sub-pixels is smaller than the size of the first and second sub-pixels in the second direction;
• within a circumscribed rectangular area of the four sub-pixels arranged in two rows and two columns in the reference sub-pixel array, a number of the first sub-pixels, a number of the second sub-pixels, and a number of the third sub-pixels are all two times a number of the fourth sub-pixels;
• centers of the four sub-pixels arranged in two rows and two columns in the reference sub-pixel array are located at four vertexes of a rectangle, and centers of all the sub-pixels in the reference sub-pixel array are located at vertexes of a plurality of rectangles arranged in a checkerboard pattern;
• a ratio of a maximum spacing to a minimum spacing between two opposite sides of any two adjacent sub-pixels ranges from 0.8 to 1.2;
• either of the first and second sub-pixels has a color of red, and the other has a color of blue;
• and the color of the third sub-pixels is a first color, and the color of the fourth sub-pixels is green;
• the first color comprises any one of white, yellow and cyan;
• the sub-pixel arrangement structure is located on the substrate;
• and blue sub-pixels are sub-pixels which have the largest area of the orthographic projection on the substrate in the sub-pixel arrangement structure.