| 摘要 |
PROBLEM TO BE SOLVED: To provide a light guide member capable of reducing loss of the amount of light when using a large-sized light source or a plurality of light sources, and capable of suppressing increase in size.SOLUTION: A rod-like light guide member 1 includes: a wide width part 13 provided along a length direction; and a narrow width part 14 which is provided along the length direction, which protrudes in the direction orthogonal to the width direction from the wide width part 13 on a cross section orthogonal to the length direction, and whose width is narrower than that of the wide width part 13. The wide width part 13 has a step surface 131 which connects the side surface 130 of itself and a side surface 140 of the narrow width part 14. An end surface in the length direction of the wide width part 13 is made to be an incident surface 132 where the light emitted from a light source 20 enters. A projection end surface of the narrow width part 14 projecting from the wide width part 13 is made to be a reflection surface 141 for reflecting the light entered from the incident surface 132. A surface of the wide width part 13 on the opposite side of the narrow width part 14 is made to be a light emission surface 133 for emitting the light reflected at the reflection surface 141. |
