Thin film transistor array substrate, display panel thereon, and method of testing single color image of display panel

A display panel comprising:

• a thin film transistor array substrate comprising:
• a plurality of pixels arranged in a matrix comprising a plurality of columns and a plurality of rows, each of the plurality of pixels comprising a plurality of sub-pixels, the plurality of sub-pixels arranged in a matrix comprising a plurality of columns and a plurality of rows, the plurality of sub-pixels comprising a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel arranged in a 2×2 matrix, the first sub-pixel configured to display a first color, the second sub-pixel configured to display a second color, the third sub-pixel configured to display a third color, the fourth sub-pixel configured to display a fourth color;
• a plurality of data lines and a plurality of scan lines configured to drive the plurality of pixels, wherein two of the plurality of data lines are arranged between every two adjacent columns of the sub-pixels, one of the plurality of scan lines is arranged between every two adjacent rows of the sub-pixels, the sub-pixels in the same row are electrically coupled to the adjacent same scan line, the sub-pixels configured to display a same color in each column of the sub-pixels are electrically coupled to the adjacent same data line, and the sub-pixels displaying different colors in each column of the sub-pixels are electrically coupled to different data lines;
• four data test points comprising a first data test point, a second data test point, a third data test point, and a fourth data test point, every two data lines which are electrically coupled to the sub-pixels of each column of the sub-pixels are coupled to a node, and four adjacent nodes are respectively electrically coupled to the four data test points;
• and
• four scan test points comprising a first scan test point, a second scan test point, a third scan test point, and a fourth scan test point, four of the plurality of scan lines respectively coupled to adjacent four rows of the sub-pixels are respectively electrically coupled to the four scan test points,
• wherein, every two sub-pixels which are configured to display a same color and adjacent to each other have opposite polarities.