This application discloses a backlight module, including: a back plate, a backlight source installed on the back plate, a luminous region located in the center region of the back plate, and a dark region which is located at the edge of the back plate and surrounds the luminous region. The backlight source includes first light sources and second light sources. The first light sources are located in the luminous region, and the second light sources are located in the dark region.