Patent ID: 9198249
Filing Date: 2015-11-24
Classification: H05B,Y02B

Abstract:
1. A lighting system comprising a lighting appliance, and a driving device that includes: a rectifier circuit operable to rectify an input alternating current signal and to output a pulsating direct current voltage; a voltage reducing circuit electrically coupled with the rectifier circuit and operable to reduce the voltage of the pulsating direct current voltage and to output a reduced direct current voltage associated with the pulsating direct current voltage; a dimmer circuit electrically coupled with the voltage reducing circuit for receiving the reduced direct current voltage therefrom, and operable to detect from the reduced direct current voltage occurrence of an interruption to the pulsating direct current voltage and to generate a dimmer signal corresponding to detected occurrence of the interruption to the pulsating direct current voltage; and a driver module electrically coupled with the lighting appliance, the rectifier circuit and the dimmer circuit and operable to modulate a duty cycle of the pulsating direct current voltage based on the dimmer signal to generate a pulse width modulated signal that is provided to the lighting appliance for driving the lighting appliance to generate light with an intensity corresponding to the dimmer signal.