Patent ID: 7942534
Filing Date: 2011-05-17
Classification: G03B

Abstract:
1. A projector, comprising: an illumination device that radiates plural colors of light in a time-sharing manner; a reflective optical modulator that forms, based on input image information, an optical image for each of the plural colors of light radiated from the illumination device in a time-sharing manner; a projection optical device that projects the optical images of the plural colors of light formed by the reflective optical modulator; and a controller that controls the illumination device and the reflective optical modulator, the controller including: an image information analyzer that analyzes the input image information; and an illumination time controller that dynamically changes and controls illumination time of the plural colors of light by the illumination device based on an analysis result by the image information analyzer, wherein the illumination device includes: a white-color light source that radiates white light; a light-source driver that drives the white-color light source; a color wheel that is disposed on the downstream of the white-color light source on an optical path and partitioned into transmissive color regions in accordance with the plural colors of light, the color wheel rotating to switch the plural colors of light to select a to-be-radiated color of light; and a rotation driver that rotates the color wheel, and the illumination time controller includes: an illumination-light-amount calculator that calculates illumination light amounts of the plural colors of light based on the analysis result by the image information analyzer; a light-source drive controller that outputs a control command to the light-source driver in accordance with the illumination light amounts of the plural colors of light calculated by the illumination-light-amount calculator to adjust a light amount of the white-color light source; and a rotation drive controller that outputs a control command to the rotation driver in accordance with the calculated illumination light amounts of the plural colors of light to control a rotation of the color wheel.