| 摘要 |
PROBLEM TO BE SOLVED: To provide a signboard which performs display high in effect to appeal to people visually. SOLUTION: The signboard is equipped with a half mirror 1 and a reflection mirror 3 disposed on the back side of the half mirror 1. A light-illumination part 4 to illuminate the half mirror 1 with light is formed in a part of the reflection mirror 3. The light emitted from the light-illuminating part 4 to illuminate the half mirror 1 is partly transmitted through the half mirror 1, while the rest is reflected. The light reflected by the half mirror 1 is further reflected by the reflection mirror 3, and the light reflected by the reflection mirror 3 is partly transmitted through the half mirror 1 while the rest is reflected. By repeating transmission and reflection of light on the half mirror 1, images are superposed to make a stereoscopic display with three-dimensional appearance possible.
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