Dynamic EL lighting with a single power source

摘要

An EL lightening device which can individually switch the luminescence brightness of a plurality of ELs by a single inverter. In this device, a plurality of ELs (3) are connected to the output side of an inverter (1) through AC switches (2) A stabilized DC power supply (4) is connected to the input side of the inverter (1). A control circuit (5) is provided for controlling the lightening of the ELs (3) and is connected to the stabilized DC power supply (4) and the AC switches (2). The control circuit (5) outputs EL lightening signals to control ON/OFF operations of the transfers (2) and also applies an AC voltage to each EL (3) by time division so that said ELs are lightened. At the same time an inverter input voltage control signal is output in accordance with the timing at which the EL is lightened, so that the inverter input voltage of the stabilized DC power supply (4) can be varied.