A backlight module, a display device and a driving method are disclosed. The backlight module includes a first light guide plate and a second light guide plate arranged oppositely, a first light source and a second light source. A surface of the first light guide plate facing the second light guide plate is a light exit surface of the first light guide plate. The first light source is arranged at a light entrance surface of the first light guide plate. The second light source is arranged at a light entrance surface of the second light guide plate. The first light guide plate includes a light guide element guiding light along a direction perpendicular to the light exit surface of the first light guide plate. The second light guide plate includes a scattering element.