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Lighting systems

  • US 8,242,711 B2
  • Filed: 03/31/2008
  • Issued: 08/14/2012
  • Est. Priority Date: 03/30/2007
  • Status: Active Grant
First Claim
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1. A power adaptor for a lighting unit having a solid state light source, the power adaptor comprising:

  • an input for connection to a mains power supply,a power transfer module that is coupled to the input and provides an output suitable for driving the solid state light source, anda controller able to deliver a control signal to the power transfer module,wherein the power transfer module further comprises an LCL series-parallel resonant circuit, andwherein the power adaptor draws current from the input as a function of the voltage at the input,such that the intensity of light output from the solid state light source is controllable by an external power reducing device.

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