| 摘要 |
An image display device comprising a holographic screen and an image projection device for projecting an image beam onto the holographic screen at an upward or downward angle is provided, wherein a forward view color difference DELTAu'v' between a chromaticity value (u', v') at the center of the holographic screen when a white image is projected onto the holographic screen by the image projection device and a standard chromaticity value (u'o, v'o) is 0.04 or less when the projection angle of the image beam onto the center of the holographic screen is set to any angle within a specified projection angle range of 20 to 45°, whereby a image display device and holographic screen can be provided wherein the range of the projection angle of the image beam, in which an image with excellent color reproducibility can be displayed, is wide.
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