Patent ID: 9730280
Date: 2017-08-08
CPC Classifications: H02M,H05B,Y02B

Claim:
1. A ripple reduction circuit comprising: a ripple capacitor configured to drive at least a first segment of a string of light emitting diodes (LEDs); a first diode having an anode coupled to the ripple capacitor, and a cathode configured to be coupled to an input end of the first LED segment; a second diode having a cathode coupled to the ripple capacitor and the anode of the first diode, and an anode configured to be coupled between the first LED segment and a second LED segment of the string of LEDs; a third diode having an anode coupled to the ripple capacitor, and a cathode configured to be coupled to a last LED segment of the string of LEDs; and a fourth diode having a cathode coupled to the ripple capacitor and the anode of the third diode.