| 摘要 |
PROBLEM TO BE SOLVED: To reflect light in a desired direction at a reflection source.SOLUTION: An illumination system 1 includes: a light source 2 for emitting light; and a reflection source 3 for performing directional reflection so that, when reflecting light from the light source, at least one part of the reflection light is reflected toward a specific region or a position. The reflection source has a prism sheet for performing directional reflection which restricts a reflection range when reflecting the light from the light source. The prism sheet has a plurality of unit prisms arranged in a seat surface direction. Each main cross-sectional shape of the plurality of unit prisms is a substantially triangle or substantially trapezoid. Also, the reflection source has a visual effect treatment member arranged on the side closer to the light source than the prism sheet, and the visual effect treatment member has light permeability and visual effect treatment is performed on it. |
