ILLUMINATION DEVICE AND PROJECTION TYPE VIDEO DISPLAY DEVICE USING SAME

摘要

An illumination device and a projection type video display device using the same are provided to reduce uneven brightness and to render a high-accuracy adjustment unnecessary. The illumination device and the projection type video display device using the same are comprised of a plurality of light sources (1a) and (1b) for projecting substantially parallel lights, an optical separation member (polarizing beam splitters (3a), (3b)) which reflects half of the substantially parallel lights projected by each of the light sources (1a), (1b) and gets the remaining half through, and a light path changing member (2) which makes the lights from each of the light sources (1a) and (1b) in alignment with the same direction and irradiates it to the entire area of the same irradiating surface (light incident surface of integrator lens (71)).