| 摘要 |
PROBLEM TO BE SOLVED: To suppress a frequent change in luminance of video.SOLUTION: An object detection unit 50 is configured to, when the position of an object to be detected is in the vicinity of a screen 3 in a light projection area, be incapable of detecting the object, and when the position of the object is in the vicinity of a projection lens 2 in the light projection area, be capable of detecting the object. A projection-type display device 100 lowers luminance of projection luminous flux LT1 when the object detection unit 50 detects the object. |
