Pixel layout structure, metal mask, and display apparatus

Abstract

A pixel layout structure includes a plurality of first, second and third sub-pixels arranged as a plurality of first repeat units, each comprising a first sub-pixel and a second sub-pixel, and further as a plurality of second repeat units, each including a third sub-pixel and a second sub-pixel. The first repeat units and the second repeat units are alternately arranged along a first direction. The second sub-pixels are arranged in a matrix along the first direction and the second direction. Four second sub-pixels are disposed adjacent to and around each one first sub-pixel or each one third sub-pixel. The plurality of first sub-pixels and the plurality of third sub-pixels each have a shape of an irregular polygon with four sides facing respectfully four adjacent second sub-pixels, and each of the four sides has a shape of an inward curve in a direction distal from an adjacent second sub-pixel.

What is claimed is: 
     
         1 . 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; 
 the plurality of second sub-pixels are arranged in a matrix along the first direction and the second direction; 
 four second sub-pixels are disposed adjacent to and around each one first sub-pixel or each one third sub-pixel; 
 the plurality of first sub-pixels and the plurality of third sub-pixels each have a shape of an irregular polygon with four sides facing respectfully four adjacent second sub-pixels; and 
 each of the four sides has a shape of an inward curve in a direction distal from an adjacent second sub-pixel. 
   
     
     
         2 . The pixel layout structure of  claim 1 , wherein at least a portion of a side of at least one of the four second sub-pixels facing the one first sub-pixel or the one third sub-pixel is a curved shape. 
     
     
         3 . The pixel layout structure of  claim 1 , wherein a side of at least one of the four second sub-pixels facing the one first sub-pixel or the one third sub-pixel is a substantially straight. 
     
     
         4 . The pixel layout structure of  claim 1 , wherein at least a portion of the inward curve of one first sub-pixel is parallel to a curved shape portion of one second sub-pixel facing the one first sub-pixel. 
     
     
         5 . The pixel layout structure of  claim 1 , wherein the inward curve of one first sub-pixel has a same shape as or substantially complementary to a curved shape portion of one second sub-pixel facing the one first sub-pixel. 
     
     
         6 . The pixel layout structure of  claim 1 , wherein each of the plurality of third sub-pixels comprises at least four sides facing the four second sub-pixels. 
     
     
         7 . The pixel layout structure of  claim 6 , wherein at least a portion of at least one of the at least four sides is a curved shape. 
     
     
         8 . The pixel layout structure of  claim 7 , wherein the inward curve of one third sub-pixel is parallel to a curved shape portion of one second sub-pixel facing the one first sub-pixel. 
     
     
         9 . The pixel layout structure of  claim 7 , wherein the inward curve of one third sub-pixel has a same shape as a curved shape portion of one second sub-pixel facing the one first sub-pixel. 
     
     
         10 . The pixel layout structure of  claim 1 , wherein the inward curve is parallel to a curved shape portion of one second sub-pixel facing the one first sub-pixel or the one third sub-pixel. 
     
     
         11 . The pixel layout structure of  claim 1 , wherein each of the plurality of second sub-pixels has an axial symmetry shape. 
     
     
         12 . The pixel layout structure of  claim 1 , wherein at least one of each of the plurality of first sub-pixels or each of the plurality of third sub-pixels has a shape of axial symmetry. 
     
     
         13 . The pixel layout structure of  claim 1 , wherein each of the plurality of second sub-pixels has a shape of substantially a circle or an oval. 
     
     
         14 . The pixel layout structure of  claim 13 , either or both of each of the plurality of first sub-pixels and each of the plurality of third sub-pixels have a shape of:
 an irregular octagon with four substantially straight sides and four substantially curved sides by chamfered corners; or   a quadrilateral with four concave sides and four flat or chamfered corners.   
     
     
         15 . The pixel layout structure of  claim 13 , wherein both of each of the plurality of first sub-pixels and each of the plurality of third sub-pixels have sides facing the adjacent second sub-pixel having the shape of the inward curve are connected smoothly, thereby forming an approximate ellipse or circle. 
     
     
         16 . The pixel layout structure of  claim 1 , wherein each of the plurality of second sub-pixels has a smaller size than each of the plurality of first sub-pixels, and each of the plurality of second sub-pixels has a smaller size than each of the plurality of third sub-pixels. 
     
     
         17 . The pixel layout structure of  claim 16 , wherein each of the plurality of second sub-pixels is configured to emit a green light. 
     
     
         18 . The pixel layout structure of  claim 1 , wherein a gap distance between any adjacent sub-pixels has a distance of at least 16 μm or larger. 
     
     
         19 . A display apparatus, comprising a pixel layout structure according to  claim 1 . 
     
     
         20 . The display apparatus of  claim 19 , 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.