Patent ID: 9578698
Date: 2017-02-21
CPC Classifications: H05B

Claim:
1. A light emitted diode (LED) circuit, comprising: a plurality of driving circuits, wherein the plurality of driving circuit are connected in series, and each driving circuit comprises a plurality of diodes; a plurality of loading circuits, connected to the corresponding driving circuit respectively; wherein the plurality of driving circuit are arranged for generating a plurality of driving voltages respectively to drive the plurality of loading circuits; wherein each loading circuit comprises at least a loading block, and the at least a loading block comprises a plurality of loading strings, a first node and a second node, and each loading string comprises a plurality of diodes connected in series, and a P terminal of a first diode of the plurality of diodes connected in series is coupled to the first node, an N terminal of a last diode of the plurality of diodes connected in series is coupled to the second node; wherein the plurality of diodes in each driving circuit comprise a first diode, a second diode, a third diode and a fourth diode, and each driving circuit further comprises a first node, a second node, a third node and a fourth node, wherein an N terminal of the first diode and a P terminal of the second diode are connected to the first node of the driving circuit, an N terminal of the second diode and an N terminal of the third diode are connected to the second node of the driving circuit, a P terminal of the third diode and an N terminal of the fourth diode are connected to the third node of the driving circuit, a P terminal of the fourth diode and a P terminal of the first diode are connected to the fourth node; wherein the first node of a first driving circuit of the plurality of driving circuits connected in series is coupled to a terminal of an alternating current (AC) source, the third node of a last driving circuit of the plurality of driving circuits connected in series is coupled to the other terminal of the AC source; and except the first driving circuit of the plurality of driving circuits connected in series, the first nodes of other driving circuits are coupled to the third node of the previous driving circuit.