Energy-saving high-reliability partitioned series light source driving circuit and working method thereof

The invention belongs to the technical field of light source driving, and provides an energy-saving high-reliability partitioned series light source driving circuit and a working method thereof, and the circuit comprises a first constant current circuit, a first light source control circuit, a second light source control circuit, a third light source control circuit and a second constant current circuit which are connected in sequence. Each of the first light source control circuit, the second light source control circuit and the third light source control circuit comprises a plurality of light emitting diodes which are connected in series; the first constant current circuit is connected with a power supply, the first constant current circuit is connected with the power supply, and the first constant current circuit and the second constant current circuit are electrically connected with the controller; the first light source control circuit, the second light source control circuit and the third light source c