Patent ID: 7213922
Filing Date: 2007-05-08
Classification: H04N

Abstract:
1. A projector, comprising: an illuminating device having a light source that forms illumination light by utilization of the light source; a main light modulating device that is illuminated by the illumination light from the illuminating device and that modulates the illumination light to form image light; an auxiliary light modulating device that alternates, by modulation, a light intensity of the image light formed by the main light modulating device; a projection optical system that projects the image light formed by the main light modulating device and auxiliary light modulating device to a projection surface; and a signal processing circuit that generates, from an inputted image signal, a drive signal to the main light modulating device and the auxiliary light modulating device so as to increase a contrast ratio of image light projected, by harmonizing operation of the main light modulating device and the auxiliary light modulating device, the signal processing circuit determining drive signals to the main light modulating device and the auxiliary light modulating device by making a predetermined operation on signals of respective colors in the inputted image signal.