Patent ID: 9609714
Date: 2017-03-28
CPC Classifications: H05B,Y02B

Claim:
1. A power supply device, comprising: LED driver circuits electrically connected to LED light sources, respectively; and a control circuit, wherein each of the LED light sources comprises light-emitting diodes electrically connected in series, ends, on anode sides, of the LED light sources are electrically connected to each other, the control circuit is configured to adjust electric currents flowing through the LED light sources through the LED driver circuits, respectively, and the control circuit is configured, when current is prohibited from flowing through a target light source, to perform control of a target driver circuit so that a voltage lower than a threshold voltage at which current starts to flow through the target light source is applied across the target light source, the target light source being a part of the LED light sources, the target driver circuit comprising an LED driver circuit, corresponding to the target light source, of the LED driver circuits.