Pixel layout structure, metal mask, and display apparatus

1. A pixel layout structure, comprising a plurality of first sub-pixels, a plurality of second sub-pixels, and a plurality of third sub-pixels, 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;

a set of four corresponding alternative sub-pixels surround a corresponding second sub-pixel, the corresponding alternative sub-pixel including a plurality of corresponding first sub-pixels and a plurality of corresponding third sub-pixels;

the plurality of first sub-pixels and the plurality of third sub-pixels are alternately arranged in the first direction and the second direction; and

each of the plurality of alternative sub-pixels comprises a plurality of sides each facing a plurality of corresponding second sub-pixels; and

a uniform gap distance is formed between a surface of each particular second sub-pixel and each set of four corresponding alternative sub-pixels;

wherein the corresponding second sub-pixel is a green sub-pixel having an oval shape, and each of the plurality of first sub-pixels and the plurality of third sub-pixels has an irregular octagon shape with each side facing the corresponding second sub-pixel having a concave shape.

2. The pixel layout structure of claim 1 , wherein each of the plurality of second sub-pixels has a relatively smaller size than each of the plurality of first sub-pixels, and each of the plurality of second sub-pixels has a relatively smaller size than each of the plurality of third sub-pixels.

3. The pixel layout structure of claim 1 , wherein the gap distance between any adjacent sub-pixels has a minimum distance of around 16 μm.

4. A mask set for fabricating a pixel layout structure according to claim 1 , comprising at least two masks, wherein each of the at least two masks is provided with a plurality of openings, wherein the at least two masks comprises a first mask and a second mask, the first mask having a plurality of first openings corresponding to the plurality of first sub-pixels or the plurality of third sub-pixels of the pixel layout structure in sizes and positions, and the second mask having a plurality of second openings corresponding to the second sub-pixels of the pixel layout structure in sizes and positions.

5. The mask set according to claim 4 , comprising the first mask, the second mask, and a third mask, wherein:

the first mask is provided with the plurality of first openings, corresponding to the plurality of first sub-pixels in sizes and positions;

the second mask is provided with the plurality of second openings, corresponding to the plurality of second sub-pixels in sizes and positions; and

the third mask is provided with a plurality of third openings, corresponding to the plurality of third sub-pixels in sizes and positions.

6. A display apparatus, comprising a pixel layout structure according to claim 1 .

7. The display apparatus of claim 6 , wherein each of the plurality of first sub-pixels, the plurality of second sub-pixels, and the plurality of third sub-pixels comprises an OLED.