Patent ID: 6483533
Filing Date: 2002-11-19
Classification: H04N

Abstract:
A projection television, comprising:a projection screen formed by a three dimensional hologram representing a three dimensional array of lenticular elements disposed on a substrate and having an effective index of refraction that is wavelength dependent, resulting in a chromatic aberration in which different colors of refracted light are bent at different output angles; at least three image projectors for projecting respective images of different colors onto said holographic projection screen , a first one of said projectors having a first, shortest optical path disposed in a substantially orthogonal orientation with said holographic projection screen and at least two of said projectors being disposed in adjacent, stepped-relation to one another and having respective optical paths (i) selectively defined by said stepped-relation, and (ii) converging toward said first optical path in a non orthogonal orientation and defining angles of incidence that compensate for said different output angles of said refracted light that contribute to said chromatic aberration of said holographic projection screen; and said screen receiving images from said projectors on a first side and displaying said images on a second side with controlled light dispersion of all said displayed images.