| 摘要 |
PROBLEM TO BE SOLVED: To provide a light source unit which can partially make color of light projected from a light guide plate on an illuminated body into the different color and rainbow color, and can intermittently project the light on a position correspondent to an illumination area of the illuminated body. SOLUTION: The light source unit which has a luminous body acting as a light source, and the light guide plate which guides the light projected from the luminous body to the illuminated body has a hologram which is formed on a surface opposed to the illuminated body of the light guide plate and reproduces the light with projected from the luminous body as diffracted light with a prescribed wavelength to be projected in a direction nearly orthogonal to the illuminated body. |
