Light control device for lighting system, has control unit for comparing luminance signals with reference signal when luminance signals generate control signal for reducing lamp brightness and transmit control signal to one of buses

摘要

The device (11) has a control unit (23) connected with buses (12, 22) and provided for receiving luminance signals (sh) of brightness sensors (19-21). The control unit compares the luminance signals with a reference signal when the luminance signals generate a control signal (sa) for increasing lamp brightness and transmit the control signal to the buses and when the luminance signals generate another control signal (sd) for reducing the lamp brightness and transmit the latter signal to one of the buses when the luminance signals display brightness lying above minimum brightness. Independent claims are also included for the following: (1) a lighting system (2) a method for illumination controlling in a lighting system.