| 摘要 |
Provided is an illuminating optical device capable of suppressing a reduction of luminance in a display mode in which color reproducibility is emphasized. A plurality of light source units (11, 19, 20) each emit different colors of light. A color wheel (28) includes a plurality of transmission regions each for transmitting a different color of light, and by rotation of the color wheel (28), the position at which incident light from the light source units is incident moves over the transmission regions. A storage unit (50) stores a plurality of lighting pattern information indicating each of a plurality of lighting patterns having different lighting periods for which each light source unit is lit. A control unit (60) receives a selection signal for selecting any of the plurality of lighting patterns, and causes each light source unit to light in response to the lighting pattern information indicating the lighting pattern selected by the selection signal. |
