| 摘要 |
PROBLEM TO BE SOLVED: To increase the maximum number of spectators who can view a video at the same time and to effectively utilize one side of a screen in a similar way that the other side of the screen is utilized as the video viewing area of spectators by projecting a clear video on both surfaces of a water screen respectively. SOLUTION: A projection device 14A for one side is set on the one side 15 of the water screen 8, and a projection device 14B for the other side is set on the other side 16, the clear video is projected on the surface 8B on the back side of the screen 8 by the device 14A for the one side, and also a clear video which is the same as the video projected on the surface 8B on the back side, has the same size, coincides with the video on the surface 8B and whose right and left are opposite to those of the video on the surface 8B is projected on the surface 8A on the surface side by the device 14B for the other side. The spectators view the video on the surface 8A on the surface side from the side 15 of the screen 8 and view the video on the surface 8B on the back side from the other side 16.
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