| abstract |
An illumination device capable of reducing speckle noise and realizing high light use efficiency and a projector capable of displaying a bright and high-quality image are provided. Light source units 12R, 12G, and 12B that supply coherent light, and light modulators 13R, 13G, and 13B that modulate at least one of the phase and amplitude of the coherent light and enter the illumination area of the irradiated surface; The light modulation units 13R, 13G, and 13B sequentially switch a plurality of modulation patterns that generate a substantially constant light amount distribution in a substantially constant illumination region. [Selection] Figure 1 |