In the present disclosure, the first sub-pixels 201 may be blue sub-pixels, the second sub-pixels 202 may be green sub-pixels, and the third sub-pixels 203 may be red sub-pixels. Correspondingly, an arrangement of the plurality of sub-pixels in the display module may be different from a standard RGB arrangement. A display unit of the standard RGB arrangement is composed of three sub-pixels with red, green, and blue. In the present embodiment, the arrangement of the plurality of sub-pixels may form two different types of display units. A first type display unit may include a red sub-pixel and a green sub-pixel, and a second type display unit may include a blue sub-pixel and a green sub-pixel. Since only three primary colors can form all colors and two colors cannot form all colors, a display unit in the present disclosure may borrow another color from an adjacent display unit to form three primary colors when the display module displays images. Each display unit and an adjacent display unit may share a sub-pixel with a color that they do not have, to achieve a white display together. The standard RGB arrangement is used in liquid crystal display devices. A liquid crystal display device usually uses a backlight source to emit light passively, and its RGB implementation on the display device is a filter. The filter can be formed easily and high-density RGB ribbons do not increase cost significantly. For an organic light-emitting display panel that emits light actively, RGB corresponds to organic light-emitting materials. Each of the light-emitting materials may be needed to be small, and may be integrated with a high density, to achieve a display device with high resolution. The fabrication process may be difficult, and the cost may be high. In the present disclosure, the pixel arrangement may be achieved by sharing a common sub-pixel by adjacent display units. A number of the plurality of sub-pixels in the display panel with a same area may be reduced. A low resolution may be used to simulate a high-resolution display effect, and the display module may have a high visual brightness at the same brightness. In the sub-pixel arrangement of the present disclosure, each display unit may only include two materials and each of the two materials may have a larger area. The fabrication process may be simplified and the cost may be reduced. Since human eyes are most sensitive to green in the three primary colors (red, green, and blue), in the present disclosure, the first sub-pixels 201 may be blue sub-pixels, the second sub-pixels 202 may be green sub-pixels, and the third sub-pixels 203 may be red sub-pixels. A number of the green sub-pixels may be larger than a number of the blue sub-pixels and a number of the red sub-pixels. The visual resolution of the human eyes and the display quality may be improved further.