LIGHTING CONTROL DEVICE

摘要

Provided is a lighting control device capable of handling many types of lighting loads. A power source unit (5) is electrically connected between a pair of input terminals (11, 12) and generates a control power source using the power supplied from an alternating current power source (8). A voltage detection unit (53) detects a voltage (Vc2) from the control power source. A control unit (6) operates by receiving the control power source supplied from the power source unit (5). At the control unit (6), a bidirectional switch (2) is controlled, on the basis of the detection signal from a phase detection unit (3), in such a manner that the bidirectional switch (2) is switched from an ON state to an OFF state at a switching time point, when a variable time corresponding to a lighting control level has elapsed from the half-period start point of the alternating current voltage (Vac). In the OFF period from the switching time point to the half-period end point, if the voltage (Vc2) detected by the voltage detection unit (53) has a predetermined threshold value or greater, a stop unit (13) stops the generation of control power source at the power source unit (5).