A backlight module is provided. The backlight module is used for a display panel having a camera region. The backlight module may be operated in display mode or camera mode. The backlight module includes multiple light emitting units. When the backlight module is operating in the display mode, the light emitting units are all turned on. When the backlight module is operating in the camera mode, a portion of the light emitting units corresponding to the camera region of the display panel is turned off, and another portion of the light emitting units is turned on.