Patent ID: 7384160
Filing Date: 2008-06-10
Classification: G02B,H04N

Abstract:
1. A projector that displays an image on a projection surface, the projector comprising: a test pattern projecting unit that projects a predetermined test pattern on the projection surface; a focus changing unit that moves a focal point of the projector; an imaging unit that performs imaging of the projected test pattern to generate a shot image; an indicator value calculating unit that calculates an indicator value relating to a focus state of the shot image varying with movement of the focal point; and a focus adjustment unit that performs focus adjustment that focuses the focal point on the projection surface using the indicator value, the test pattern including a first kind and a second kind of density areas alternately arranged and having different density with each other, and at least the first kind of density areas including a narrow area and a broad area, the indicator value being a value that indicates a degree of increase and decrease of brightness along a width direction of the first kind and the second kind of density areas in the shot image.