IMAGE PROJECTION APPARATUS AND CONTROL METHOD THEREFOR

摘要

The image projection apparatus of the present invention includes a light source that outputs coherent light; a phase modulator that performs phase modulation on the light output from the light source to create a Fourier transform image; an amplitude modulator that performs amplitude modulation on the Fourier transform image in accordance with an image signal; a projection optical system that projects the light that has been amplitude modulated, and a controller that divides the image represented by the image signal into a plurality of divided images, determines the target luminance value of each of the areas of the Fourier transform image that is divided corresponding to the division of the image, based on the image signal, and outputs phase data indicating the amount of phase modulation so as to make the luminance value of each area of the Fourier transform image acquire the target luminance value of the associated area.

主权项

1. An image projection apparatus for projecting an image represented by an input image signal, comprising:
a light source that outputs coherent light; a phase modulator that performs phase modulation on the light output from said light source to create a Fourier transform image; an amplitude modulator that performs amplitude modulation on the Fourier transform image in accordance with said image signal; a projection optical system that projects the light that has been amplitude modulated by said amplitude modulator; and, a controller that divides the image represented by the image signal into a plurality of divided images, determines the target luminance value of each of the areas of the Fourier transform image that is divided corresponding to the division of the image, based on said image signal of the divided image corresponding to the area, and outputs phase data indicating the amount of phase modulation on the output light from said light source so as to make the luminance value of each area of the Fourier transform image acquire the target luminance value of the associated area.