Patent ID: 8648773

Claim:
A three-dimensional display for presenting a three-dimensional image based on three-dimensional shape data, comprising: a light ray controller having a cone shape or a columnar shape and arranged such that a bottom of said cone shape or said columnar shape is opened on a reference plane; at least one light ray generator provided around said light ray controller so as to direct a light ray group including a plurality of light rays from under said reference plane and from the outside of said light ray controller to an external surface of said light ray controller; a rotating mechanism adapted to rotate said at least one light ray generator around a central axis of the light ray controller; and control means adapted to control said at least one light ray generator such that a three-dimensional image is presented by the light ray group generated by said at least one rotated light ray generator based on said three-dimensional shape data, wherein said light ray controller is formed to transmit each light ray directed by said at least one light ray generator without diffusing the light ray in a circumferential direction and to transmit the light ray while diffusing the light ray in a ridgeline direction.