Patent ID: 7594733

Claim:
A converging sheet disposed in a surface light source unit containing a light source member formed of a plurality of light sources arranged in parallel, the converging sheet having a sheet face and converging light from the light source member, the converging sheet comprising: a lens member formed of a plurality of unit lenses of convex shape that are arranged on a light-emerging side of the converging sheet at a predetermined lens pitch; and a scattering layer that is formed in direct contact with the plurality of unit lenses so that the scattering layer conforms to the shape of the plurality of unit lenses wherein each unit lens and an associated portion of said scattering layer converges some of the light that enters a light-incident side of the converging sheet and diffuses the remainder of the light that enters the light-incident side of the converging sheet, thereby increasing the front luminance of the light emitted from the converging sheet.