Dimmable light emitting diode lighting system

摘要

An LED lighting system including a first group of LEDs, a second group of LEDs, and a controller. The first group of LEDs and the second group of LEDs are configured to be independently driven by a first LED drive signal and a second LED drive signal, respectively. The controller is configured receive a dimming signal from a dimmer having a preheat function. The controller is also configured to compensate the dimming signal for the preheat function of the dimmer to generate a compensated dimming signal, generate the first LED drive signal based on the compensated dimming, and generate the second LED drive signal based on the compensated dimming signal. The first LED drive signal is then transmitted the first group of LEDs and the second LED drive signal is transmitted to the second group of LEDs.

主权项

1. A light-emitting diode (“LED”) lighting system comprising:
a dimmer having a preheat function and configured to generate a dimming signal; a first group of LEDs and a second group of LEDs, the first group of LEDs and the second group of LEDs configured to be independently driven by a first LED drive signal and a second LED drive signal, respectively; a dimming controller configured to
receive the dimming signal from the dimmer, andgenerate a first pulse-width modulated (“PWM”) signal based on the dimming signal, the first PWM signal having a first duty cycle; a software controller in electrical communication with the dimming controller, the software controller configured to
receive the first PWM signal from the dimming controller,compensate the first PWM signal for the preheat function of the dimmer to generate a second PWM signal, the second PWM signal having a second duty cycle, the second duty cycle being different than the first duty cycle; and an LED driver module configured to
receive the second PWM signal,generate the first LED drive signal based on the second PWM signal, the first LED drive signal associated with a drive level of the first group of LEDs,generate the second LED drive signal based on the second PWM signal, the second LED drive signal associated with a drive level of the second group of LEDs, andtransmit the first LED drive signal to the first group of LEDs and the second LED drive signal to the second group of LEDs.