Patent ID: 9172931
Filing Date: 2015-10-27
Classification: G03B,G09G,H04N

Abstract:
1. A projection display device comprising: an image light projecting unit that projects image light on a screen; a distance measurement unit that measures distance to the screen; an obstacle detecting unit that detects an obstacle between the screen and the image light projecting unit on the basis of distance information obtained by the distance measurement unit and, according to a result of this detection, determines an adjustment area where the image light to be projected is to be adjusted; a projection adjusting unit that adjusts the image light in the adjustment area; a distance information calculating unit that calculates distance information regarding multiple points from multiple images; a plane estimating unit that approximately estimates a plane corresponding to a projection surface from the distance information calculated by the distance information calculating unit; a person position estimating unit that estimates a position of a person on the basis of the plane estimated by the plane estimating unit and the distance information calculated by the distance information calculating unit; and a projection light adjusting unit that adjusts projection light at the position of the person estimated by the person position estimating unit.