Projector

摘要

Two light modulators, a first light modulator and a second light modulator, suffice for four light sources, a first light source, a second light source, a third light source, and a fourth light source, whereby the cost can be lowered as compared with a configuration in which three light modulators are required. As a result, cost reduction is achieved. Further, since two light modulators suffice, the size of the projector can be reduced as compared with the configuration in which three light modulators are required.

主权项

1. A projector comprising:
a first light source that emits first light; a second light source that emits second light having a wavelength shorter than the wavelength of the first light; a first light modulator that modulates the first light and the second light and outputs the modulated light fluxes as first polarized light; a third light source that emits third light having a wavelength shorter than the wavelength of the first light; a fourth light source that emits fourth light having a wavelength shorter than the wavelength of the third light; a second light modulator that modulates the third light and the fourth light and outputs the modulated light fluxes as second polarized light; a combiner that combines the first light, the second light, the third light, and the fourth light by directing the first light and the second light having exited out of the first light modulator in a predetermined direction based on one of transmission and reflection and directing the third light and the fourth light having exited out of the second light modulator in the predetermined direction based on the other one of transmission and reflection different from the one of transmission and reflection; and a controller that drives the first light source and the third light source to emit the first light and the third light simultaneously in a first period, drives the second light source and the fourth light source to emit the second light and the fourth light simultaneously in a second period following the first period, controls the first light modulator to perform modulation corresponding to the first light in the first period and modulation corresponding to the second light in the second period, and controls the second light modulator to perform modulation corresponding to the third light in the first period and modulation corresponding to the fourth light in the second period.