ILLUMINATOR AND PROJECTION DISPLAY

摘要

An illuminator for use in a projection display in which the quantity of light inputted into an optical modulation means can be varied without varying the intensity of light outputted from a lamp and an excellent effect can be produced in the aspect of video representation or adaptability to the use environment. The illuminator comprises a light source, two fly-eye lenses constituting a uniform illumination means, and a light-shielding plate interposed between the fly-eye lenses and constituting light-regulating means for regulating the quantity of light emitted from the light source. The quantity of light can be regulated by controlling the inclination angle of the light shielding plate according to a video signal delivered to the optical modulation means.