Patent ID: 9370056
Filing Date: 2016-06-14
CPC Classification: H05B,Y02B

Claim Text:
1. A dimmable light-emitting diode (LED) driving apparatus comprising a dimmer switch, which controls connection or disconnection of an LED series, the dimmable LED driving apparatus further comprising: a boost circuit electrically coupled to the LED series; a comparator electrically coupled to the boost circuit, the comparator receiving a triangle wave signal to generate a Pulse Width Modulation (PWM) signal, the PWM signal controlling the boost circuit; a resistor-capacitor (RC) circuit electrically coupled to the comparator, the RC circuit utilized to output a charging curve signal to the comparator for the comparator to generate the PWM signal with diminishing duty cycles when the dimmer switch disconnects; and a switching circuit utilized to turn on a connection between the RC circuit and the comparator when the dimmer switch disconnects, so that the comparator receives the charging curve signal.