Patent ID: 9591708
Date: 2017-03-07
CPC Classifications: H05B,Y02B

Claim:
1. An LED driving device for dynamic segment configurations, connecting to a bridge rectifier, wherein, the LED driving device comprises: a first adjustable LED lamp string unit, a first N-type switch module, at least one adjustable LED lamp string module, at least one P-type switch module, at least one second N-type switch module, a control logic module, applied to control the first adjustable LED lamp string unit, the adjustable LED lamp string module, the P-type switch module, the first N-type switch module and the second N-type switch module, as well as a current detection module, applied to detect the output currents from the first N-type switch module and the second N-type switch module before feeding back to the control logic module; the adjustable LED lamp string module comprises a second adjustable LED lamp string unit and a unidirectional conduction unit; and a control logic module outputs control signals, based on the output voltage variations from the bridge rectifier, to control the turn-on and turn-off states of the first adjustable LED lamp string unit, the adjustable LED lamp string module, the P-type switch module, the first N-type switch module and the second N-type switch module, also it adjusts the serial and parallel connection states of the first and the second adjustable LED lamp string units dynamically.