Patent ID: 6392767
Filing Date: 2002-05-21
Classification: G02B,G03H,H04N

Abstract:
A display device using a hologram recording an interference fringe formed by an object light and a reference light on a photosensitive dry plate, comprising:a display unit for generating a signal light including an image to be displayed; a hologram screen formed by a transmission hologram and having directivity in order to diffract and transmit the signal light irradiated from a predetermined angle range &agr; to an observer; and a projecting unit for projecting the signal light to the hologram screen; wherein a reflection preventing material having transparency is arranged to a rear side of the hologram screen, and has a low reflection rate for an incident angle of a first noise light or a second noise light; the first noise light is generated from a direction opposite to the predetermined angle range &agr; to the hologram screen, and diffracted therefrom and transmitted therethrough; and the second noise light is normally reflected by the reflection preventing material, and has the same direction as the predetermined angle range &agr;.