| 摘要 |
The system has a communication module provided with optical and ultrasonic transmitters (5, 7) and optical and ultrasonic receivers (6, 8). The transmitters emit signals with a transmission range of 360 degrees in a room when a lamp is switched-on, where the signals comprise an optical signal (9) e.g. infrared, UV light and visible light, and ultrasonic pulse (10). The receivers of other lamps determine removal of the switched-on lamp based on the signals. The lamps are switched on with brightness and illumination type based on the determined removal. |
