| 摘要 |
PROBLEM TO BE SOLVED: To provide a back light apparatus for advertisement or the like. SOLUTION: A back light apparatus consists of a light source, a light conducting plate 1 configured to make light irradiated from the light source enter the same from a side surface and to reflect the incident light on a reflective surface 1C being an inclined lower surface to make the light radiate from an upper surface, and a paper 8 adhered to an external surface of the reflective surface 1C that composes the light guide plate 1. |
