An active element array substrate includes a substrate, first to third data lines extending along a first direction, first and second scan lines and a common electrode line extending along a second direction, and first to third sub-pixel units that are provided on the substrate. The first and third data lines respectively intersect with first and second adjacent ones of the first scan lines to define a pixel region. The second data line is located between the first and third data lines and passes through the pixel region. The first data line intersects with the second scan line and the common electrode line to define a plurality of sub-pixel regions in the pixel region. The first to third sub-pixel units are respectively provided in the sub-pixel regions and respectively electrically connected to the first data line and the first one of the first scan lines, the second data line and the second scan line, and the third data line and the second scan line.