Patent ID: 7808732

Claim:
A light source apparatus comprising: a plurality of light sources; a first beam profile transforming unit comprising a prism sheet having two opposite sides, a plurality of mutually parallel fine elongated prisms formed on one side of the two opposite sides, an other side of the two opposite sides being a smooth flat surface, the first beam profile transforming unit being disposed at a side of the light source apparatus closer to the light sources that are disposed to face the first beam profile transforming unit to emit light into the first beam profile transforming unit; a second beam profile transforming unit comprising a prism sheet having two opposite sides, a plurality of mutually parallel fine elongated prisms formed on one side of the two opposite sides to receive light that is passed through the two opposite sides of the prism sheet included in the first beam profile transforming unit; and the first beam profile transforming unit obliquely facing the second beam profile transforming unit, and the plurality of mutually parallel fine elongated prisms of the first beam profile transforming unit being configured to intersect the plurality of mutually parallel fine elongated prisms of the second light profile transforming unit as viewed from an incidence direction of light from the light sources.