Backlight Module and a Light Diffusing Module Using the Same

摘要

A backlight module and a light diffusing module disposed therein are provided. The light diffusing module includes a diffuser plate and an optical structure layer. The diffuser plate has a light entrance surface and a light output surface. The light entrance surface is corresponding to a light emitting surface of a light source. The light output surface of the diffuser plate includes a prickleless surface. The diffuser plate has a transmittance between 50% and 65%. The optical structure layer is disposed on the diffuser plate and includes an upper surface and a lower surface. The upper surface includes a plurality of optical structures. The lower surface of the optical structure layer directly contacts the light output surface of the diffuser plate.