ILLUMINATION UNIT, PROJECTION DISPLAY UNIT, AND DIRECT VIEW DISPLAY UNIT

摘要

An illumination unit includes one or more light sources and an optical member. The optical member includes an integrator having a first fly-eye lens on which light from a solid-state light-emitting device is incident and a second fly-eye lens on which the light from the first fly-eye lens is incident. The integrator uniformalizes an illuminance distribution of light in a predetermined illumination region illuminated by the light incident from the solid-state light-emitting device. Each of the first fly-eye lens and the second fly-eye lens has a plurality of cells. The cells of the first fly-eye lens are arranged in a first direction and a second direction that intersect each other, and positions of the cells in the second direction are different from one another at least partially among a plurality of cell rows arranged along the first direction in the first fly-eye lens.