| 摘要 |
PROBLEM TO BE SOLVED: To improve the gradation representation of a low luminance part without complicating the constitution of a light source, and also to suppress the reduction in contrast due to black-floating, in a liquid crystal projector device. SOLUTION: A light shutter 12 for shielding light in the order of the lower contrast in accordance with the contrast visual field angle characteristics of a liquid crystal panel 3 is arranged nearly to the pupil position of an illumination optical system 2, and the device is provided with a control means 14 for detecting the peak level of a video signal Vin supplied from the outside at prescribed intervals and shielding the light by using the light shutter 12 in the case the peak level is below the prescribed reference level, and also, increasing the level of the video signal Vin to drive the liquid crystal panel 3.
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