US Patent No. 9,584,780

PROJECTOR AND CONTROLLING METHOD OF THE SAME


Patent No. 9,584,780
Issue Date February 28, 2017
Title Projector And Controlling Method Of The Same
Inventorship Atsushi Kato, Tokyo (JP)
Assignee NEC Display Solutions, Ltd., Tokyo (JP)

Claim of US Patent No. 9,584,780

1. A projector comprising:
at least one light source;
a light separation unit which separates light emitted from the light source into a first light and a second light in different
wavelength bands;

a TIR prism through which the first light and the second light pass;
an optical modulating element which is irradiated with and modulates the first light and the second light emitted from the
TIR prism and then emits the modulated first light and the modulated second light toward the TIR prism;

a projection lens expanding and projecting light which is modulated by the optical modulating element and passes through the
TIR prism;

a rotating prism which is rotatably arranged in a light path between the light separation unit and the TIR prism and emits,
from different positions in accordance with rotation, the first light and the second light emitted from the light separation
unit; and

a control unit causing, when image signals representing a first image and a second image are supplied, the optical modulating
element to perform modulation according to the image signal of the first image with regard to an area upon which the first
light is irradiated and to perform modulation according to the image signal of the second image with regard to an area upon
which the second light is irradiated,

wherein the first light and the second light are in the same color.