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Dimmable LED lamp

  • US 20100084990A1
  • Filed: 10/03/2008
  • Published: 04/08/2010
  • Est. Priority Date: 10/03/2008
  • Status: Active Grant
First Claim
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1. An LED lamp, comprising:

  • an AC power source;

    a varistor connected in series with the AC power source for regulating voltage spikes;

    one or more bi-directional LED chips having a threshold on voltage connected in parallel, wherein the bi-directional LED chips are connected in series to the AC power source and in parallel to the varistor;

    two or more resistors connected in series to each side of each bi-directional LED chip for regulating the voltage across the bi-directional chip;

    one or more filters for reducing voltage spikes and harmonics and for increasing the duration during which the voltage applied across the bi-directional LED chip remains above the threshold on voltage required to illuminate bi-directional LED chip.a dimmer for changing the voltage applied across the bi-directional chips.

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