OPTICAL SHEET, SURFACE LIGHT SOURCE DEVICE AND TRANSMISSIVE DISPLAY DEVICE

摘要

An optical sheet is incorporated into a direct-lighting surface light source device having a light source. The optical sheet outputs light received from the light source by changing the traveling direction of the light. The optical sheet is provided with an outputting lens section, which has a plurality of convex unit lenses arranged on the outputting side. The unit lens is provided with a scattering layer for scattering light. The scattering layer extends along the output surface of the convex unit lenses and configures the output surfaces of the unit lenses. The thickness of the scattering layer in the vicinity of a top portion of the unit lens is more than the thickness of the scattering layer in the vicinity of an end portion of the unit lens.