| 摘要 |
PURPOSE:To expand a visible range, and to obtain a bright display even when it is viewed from any direction, by constituting a screen by arranging horizontally plural pieces of strip-shaped diffusing reflection plates, and rotating each reflection plate arround of the center shaft in a vertical direction. CONSTITUTION:A screen surface 1 is constituted by arranging horizontally plural pieces of strip-shaped diffusing reflection plates 3 being short in the horizontal direction and long in the vertical direction. The reflection plate 3 is provided so that is can be rotated by a driving part 5, arround the rotary shaft 6 of the center in the vertical direction. Also, a metal such as Al, etc., is vapordeposited to both faces of the reflection plate 3 in order to make a screen gain high, and to make a reflection factor high. In such constitution, when said plate is rotated with 30 rotations on above per second by the driving part 5, it is viewed without giving the difficulty to a human eye, and the directivity of the screen is deflected to the right and left by a time division, therefore, a visible range can be secured greatly, and a bright image display can be executed even when it is viewed from any direction.
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