| 摘要 |
A projector includes an electrooptic modulator that modulates an illumination light flux in accordance with image information; a projection optical system that projects the illumination light flux modulated at the electrooptic modulator; an illuminating system that so as to illuminate an entire image forming area in one direction on an image forming area of the electrooptic modulator and to partially illuminate the image forming area in the other direction, emits an illumination light flux having a sectional form compressed in the other direction of directions; and a rotating prism that is rotated at a constant speed so that an illumination light flux from the illuminating system scan along the other direction over the image forming area of the electrooptic modulator, wherein the projector further includes: a light transmittance control module that changes a light transmittance of the illumination light flux depending on a position of the illumination light flux over the image forming area so as to reduce a difference in illuminance caused by changes in a scanning rate of the illumination light flux over the image forming area of the electrooptic modulator
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