Patent ID: 8581520
Filing Date: 2013-11-12
Classification: H05B

Abstract:
1. A lighting system, comprising: a light having a white light source and a color light source; a control circuit controlling said white and color light sources in response to a brightness control signal corresponding to a selected brightness level of said light; said control circuit pulsing said white light source and said color light source when said light is within a range of brightness levels, and in response to a change in said brightness control signal, said control circuit changing duty cycles of said white and color light sources, to alter a perceived color output of said light; a switch controlling one of said white light source and said color light source; a signal generator producing a periodic signal; a comparator receiving said periodic signal from said signal generator and controlling said switch; said comparator comparing a reference voltage to a signal voltage, said reference voltage relating to an aggregate current driving said white and color light sources and said signal voltage relating to said periodic signal; and said switch being in one of an open state and a closed state when said reference voltage exceeds said signal voltage and being in an other of said open and closed states when said signal voltage exceeds said reference voltage.