Patent ID: 9445475
Filing Date: 2016-09-13
CPC Classification: H05B

Claim Text:
1. A light emitting diode (LED) lighting system, comprising: a first string of first LEDs emitting light having a first color; a second string of second LEDs emitting light having a second color and connected in series with the first string of first LEDs; a first switch; a second switch connected in series with the first switch; an inductor having (i) a first end connected between the first switch and the second switch, and (ii) a second end connected between the first string of first LEDs and the second string of second LEDs; a first current sense resistor connected in series with the first string of first LEDs and the second string of second LEDs, wherein a first current flows through the second string of second LEDs and the first current sense resistor; a second current sense resistor connected in series with the first switch and the second switch, wherein a second current flows through the first string of first LEDs and the second current sense resistor; and a regulator module configured to wherein the desired current ratio corresponds to a ratio of (i) the second current flowing through the first string of first LEDs and the second current sense resistor to (ii) the first current flowing through the second string of second LEDs and the first current sense resistor.