Patent ID: 9615421
Date: 2017-04-04
CPC Classifications: H05B,Y02B

Claim:
1. An LED control circuit, comprising: a current source including a positive terminal and a negative terminal for providing a source current; first to (N+1)-th current paths connected with each other in parallel, where N is a positive integer greater than one; first to N-th LEDs disposed on the first to N-th current paths, respectively each LED including a cathode and an anode terminal connected to the positive terminal of the current source; first to N-th LED monitors, each LED monitor including an input terminal an output terminal, wherein each input terminal of the first to N-th LED monitors correspondingly connected to the first to the N-th current paths to receive first to N-th currents; wherein, when the first LED monitor detects a first current meets a first target value, when the source current provided by the current source is greater than first target value, a first excess current is generated, and a second current flows through the second current path, wherein, when the N-th LED monitor detects a N-th current meets a N-th target value, when a (N−1)-th excess current divided from a (N−1)-th current is greater than the N-th target value, a N-th excess current is generated, and a (N+1)-th current flows through the (N+1)-th current path.