Patent ID: 7686495

Claim:
A light source unit comprising: a plurality of light-emitting diodes having different emission spectrum peak wavelengths, respectively; and a light mixing member having an entrance surface through which lights from the light-emitting diodes are received, an exit surface disposed opposite the entrance surface to allow the lights received through the entrance surface to exit through the exit surface; and anisotropic diffusing elements comprising a plurality of substantially parallel elongated projections and recesses that are provided on the entrance surface of the light mixing member, the plurality of substantially parallel elongated projections and recesses extending in a length direction of the light mixing member; the plurality of light-emitting diodes that have different emission spectrum peak wavelengths respectively, being arranged in a direction perpendicular to the length direction of the light mixing member to face the plurality of substantially parallel elongated projections and recesses that diffuse the lights traveling through the entrance surface toward the exit surface and to promote mixing of the lights.