| 摘要 |
PROBLEM TO BE SOLVED: To provide an indirect lighting device capable of reducing glare and enhancing aesthetic appearance of a ceiling surface.SOLUTION: An indirect lighting device includes ceiling panels C1-C5 constituting a ceiling surface in a room, and a light source configured to radiate emission light L1 to the ceiling panels C1-C5 from one side (outside) of a vehicle width direction (Y direction). The ceiling panels C1-C5 are made long along a vehicle longitudinal direction (X direction), and have such a curved indoor surface that an intermediate part in the vehicle width direction projects downward. The indoor surface has: a reflection surface part 1B that is positioned on one side in the vehicle width direction, and reflects emission light L1; and a non-irradiation surface part 1C that is positioned on the other side with respect to the reflection surface part 1B, and not directly irradiated with the emission light L1.SELECTED DRAWING: Figure 4 |
