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LED driver and integrated dimmer and switch

  • US 8,754,585 B1
  • Filed: 11/26/2008
  • Issued: 06/17/2014
  • Est. Priority Date: 11/30/2007
  • Status: Active Grant
First Claim
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1. An LED driver for on/off and dimming of LEDs comprisinga. a switching LED driver circuit adapted to directly connect to 110 volt AC mains and to rectify said AC current into a regulated low voltage DC output current to drive one or more LEDs;

  • b. a PWM generator including control means to generate a PWM signal with an adjustable duty cycle wherein the LEDs are dimmed by adjustment to the pulse width in the duty cycle;

    c. a lead between the LED driver circuit and the PWM generator to provide a low voltage DC output to the PWM generator to supply power to the PWM generator;

    d. an ON/OFF switch for serially connecting said PWM generator to said LED driver circuit to provide said driver circuit with said PWM signal,d.1 wherein said control means comprises analog components and a potentiometer operatively connected to said analog components, said potentiometer is operable by an end user;

    d.2 said analog components comprising circuitry responsive to the potentiometer adapted to generate a PWM signal with a fixed frequency high enough to avoid eye detectable flickering and with a duty cycle having a modulated pulse width controlled by said potentiometer;

    d.3 said LED driver circuit being adapted to generate a fixed frequency pulse at a frequency high enough to avoid eye detectable flickering in which the pulse width is modulated proportional to said PWM signal duty cycle to control LED brightness;

    e. components “

    a”

    , “

    b”

    , “

    c”

    , and “

    d”

    being an integrated unit sized small enough to fit within a standard 110 volt AC outlet box.

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