Patent ID: 8469524
Filing Date: 2013-06-25
Classification: G03B,H04N

Abstract:
1. A projection display device that projects an image onto a projection plane, comprising: a light source; an imager which modulates light from the light source in accordance with an image signal; an aperture part which narrows light traveling toward the imager; a control part which controls the aperture part; a detection part which detects brightness of the image; and a determination part which determines whether the image is a still image or a moving image, wherein the control part operates the aperture part so as to narrow the light when the brightness of the image detected by the detection part is darker than predetermined brightness, and operates the aperture part so as to further narrow the light when the brightness of the image detected by the detection part becomes darker than the predetermined brightness, and the control part sets the predetermined brightness for operating the aperture part so as to be darker when the image is the still image than when the image is the moving image.