Patent ID: 7976172
Filing Date: 2011-07-12
Classification: H04N

Abstract:
1. A projection apparatus, comprising: a color wheel including a transmission region which allows a red ray of light emitted from a light source to pass therethrough, a transmission region which allows a blue ray of the light to pass therethrough, and a transmission region which allows a green ray of the light to pass therethrough; a sensor which detects a ray of light that has passed through the color wheel and has been modulated by a light modulation device; and a control unit which controls a ray of light that has passed through the color wheel to be directed in a first direction in which an image is projected, or, at a predetermined timing, to be directed in a second direction in which the sensor is disposed, obtains a time-division pattern of each color of the color wheel based on correspondence between rotation positions of the color wheel and colors of rays of light received by the sensor, to perform control of a proceeding direction of a ray of light modulated by the light modulation device, based on the obtained time-division pattern of each color, and synchronizes control of rotation of the color wheel and the control of the proceeding direction of the ray of light modulated by the light modulation device, based on the obtained time-division pattern of each color.