a display area having a plurality of sub-pixel regions, wherein each of the sub-pixel regions has a length and a width that are substantially the same;

a pixel array corresponding to the display area in position;

a display medium layer located on the pixel array; and

a color filter layer having a plurality of color resists and a plurality of empty regions located between the color resists, wherein the color resists are arranged along a first direction and a second direction different from the first direction, the first direction is the diagonal direction of the display area, the color resists has a cross-shaped region in the sub-pixel regions, two adjacent color resists arranged along the first direction have different colors, another two adjacent color resists arranged along the second direction have different colors, adjacent two of the color resists are spaced apart from each other, and each one of the sub-pixel regions overlaps the empty regions.