| 摘要 |
PURPOSE:To allow the user to clearly recognize the position of a commander command key even in a dark environment by radiating a radiant ray with a detection signal representing the dark state of the environment around the commander so as to allow a fluorescent substance pattern on the surface of a case of the commander to be irradiated. CONSTITUTION:When the user uses a device 3 to be controlled to turn off fluorescent lights 4a, 4b lighting a room 1, the room 1 is brought into a dark state. A contrast sensor 7 detects it to light an ultraviolet light 6 through a drive circuit 14. An ultraviolet ray radiating from the ultraviolet light 6 radiates a fluorescent substance pattern on an operating face of a commander 2. |
