A backlight module is for providing light to a liquid crystal panel having a visible region. The backlight module includes a light guide plate, light emitting units, a mesh dot layer, and a diffusing tape. The light emitting units are disposed at a position corresponding to a light entrance surface of the light guide plate for emitting light to the light entrance surface. The mesh dot layer is disposed on a bottom surface of the light guide plate. A side of the mesh dot layer corresponding to the light entrance surface is shifted inward by a first distance relative to a side of the visible region corresponding to the light entrance surface. The diffusing tape is attached onto the bottom surface corresponding to the light entrance surface for diffusing light in the light guide plate to a light exit surface of the light guide plate.