Patent ID: 9582084
Date: 2017-02-28
CPC Classifications: G06F,H04N

Claim:
1. An interactive projector capable of receiving an instruction to a projected screen by a user with a pointing element, comprising: a projection section adapted to project the projected screen on a screen surface; a plurality of cameras including a first camera and a second camera adapted to capture images of an area of the projected screen; and a position detection section adapted to detect a three-dimensional position of the pointing element based on the images captured by the plurality of cameras, wherein a unit vector representing a normal direction of the projected screen is defined as a projected-screen normal vector, a unit vector representing a direction of an optical axis of the first camera is defined as a first optical axis vector, and a unit vector representing a direction of an optical axis of the second camera is defined as a second optical axis vector, the first camera and the second camera are arranged such that an absolute value of an inner product of the second optical axis vector and the projected-screen normal vector is smaller than an absolute value of an inner product of the first optical axis vector and the projected-screen normal vector.