| 摘要 |
PROBLEM TO BE SOLVED: To improve visibility from a sight line from a diagonal upper part, and to permit visual recognition of lighting of a light emitting element even in the state where a screen is maintained in the same plane as the cabinet upper surface. SOLUTION: By using a prism 2 having an optical incident plane 2b for receiving emitted light 5a from a light emitting element 1 disposed at a prescribed position of a substrate 3 disposed in a cabinet 4, and concave mirror-like side face 2c for reflecting the light received in the shape of a concave mirror and a flat screen 2a for exposing to the portion bored in the cabinet upper surface 4a, emitted light 5a which received to the upper part diagonally to the upper surface of the cabinet 4 is refracted, and radiated as transmitted light 5b from the screen. |
