According to the huge market demand for the PWM dimming lamps of two-channel cold/warm LED lighting source and the existing problems in dimming technique

a lighting source system control algorithm based on time hybrid color mode is proposed in this paper and the independent modulation of hybrid lighting source luminance and color temperature are realized by this method. Experimental result shows that

in the process of color temperature adjustment

luminance keeps constant basically. And in the process of brightness adjustment

color temperature is also constant. This algorithm reduces the computing load of controller. At the same time

it improves the dimming control precision and eliminates the transient power overload phenomena for reliability of lighting system.