A backlight module includes a light guide plate having an incident
surface, an emitting surface adjacent to the incident surface, and a
reflective surface opposite to the emitting surface. At least one light
source is disposed adjacent the incident surface. The light source has a
luminescent surface; and at least one reflecting device is disposed
adjacent the light source. The reflecting device has a reflective surface
facing the incident surface. At least one semi-transmissive and
semi-reflective film disposed on the incident surface of the light guide
plate. The semi-transmissive and semi-reflective film and the reflecting
device together are disposed for cooperatively reflecting some (i.e., a
fraction) of the light beams emitted from the light source and
redirecting the fraction of the light beams into the light guide plate
through the incident surface, distant from the light source.