Patent ID: 7808577

Claim:
A light source device comprising: a prism sheet disposed to face a plane to be irradiated, and to bend an incident light to a direction substantially orthogonal to an incident direction; a light source section separately emitting a plurality of color lights having wavelength regions different from each other so that each of the color lights enters into the prism sheet at a small angle with respect to an extending direction of the prism sheet; a light source drive means for driving the light source section so that each of the color lights periodically scans the plane to be irradiated so as to perform a line-sequential irradiation operation; and a light guide section (i) disposed between the light source section and the prism sheet, (ii) configured to separately guide each of the color lights to the prism sheet and (iii) haying an inclination with respect to the prism sheet so that each of the color lights separately enters the prism sheet at the small angle.