Patents by Inventor David Lawrence Burchell

David Lawrence Burchell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Circuitry for LED light dimmer
    Patent number: 9420650
    Abstract: Some embodiments relate to dimmer control circuitry for LED lighting, comprising: phase control circuitry to control the supply of voltage to at least one LED load, wherein the phase control circuitry comprises an AC switch to selectively provide voltage to the LED load for a first portion of a half cycle of an AC supply voltage, and a drive component to drive the AC switch so that the AC switch remains on for the first portion of the half cycle; and load switching circuitry to couple a dissipative load to an output of the AC switch during a second portion of the half cycle, wherein the second portion overlaps with the first portion.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: August 16, 2016
    Assignee: LSC Lighting Systems (Aust) Pty. Ltd.
    Inventors: Trevor James Sykes, Gary Steven Pritchard, Dejan Deletic, David Lawrence Burchell
  • CIRCUITRY FOR LED LIGHT DIMMER
    Publication number: 20160157313
    Abstract: Some embodiments relate to dimmer control circuitry for LED lighting, comprising: phase control circuitry to control the supply of voltage to at least one LED load, wherein the phase control circuitry comprises an AC switch to selectively provide voltage to the LED load for a first portion of a half cycle of an AC supply voltage, and a drive component to drive the AC switch so that the AC switch remains on for the first portion of the half cycle; and load switching circuitry to couple a dissipative load to an output of the AC switch during a second portion of the half cycle, wherein the second portion overlaps with the first portion.
    Type: Application
    Filed: December 3, 2014
    Publication date: June 2, 2016
    Inventors: Trevor James Sykes, Gary Steven Pritchard, Dejan Deletic, David Lawrence Burchell