| 摘要 |
A lighting device (100A) provided with: at least one light-emitting element (10) for emitting light; and a light-guide plate (20) having a light-receiving end surface (20a) for receiving light emitted from the at least one light-emitting element (10), and an emitting surface (20b) intersecting with the light-receiving end surface (20a). The lighting device (100A) is further provided with a quadrilateral annular substrate (30) having four side parts (30a, 30b, 30c, 30d). The at least one light-emitting element (10) is provided on the substrate (30). |
