| 摘要 |
PROBLEM TO BE SOLVED: To enhance a contrast of a projection image by reflecting uniformly a light from a diagonal direction toward an observation side in front of a reflection screen. SOLUTION: This reflection screen has a plurality of reflecting parts 2 on an observing face of a screen substrate, and reflects, to the observation side, a projection light Lp emitted from a projection part PV arranged in a position shifted perpendicular-directionally with respect to a normal of the observing face, toward the observing face. Each reflecting part has a concave or convex spherical face 6, and a diameter thereof is formed to get larger with a distance from the projection part. COPYRIGHT: (C)2009,JPO&INPIT
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