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Hybrid light source

  • US 8,228,002 B2
  • Filed: 09/03/2009
  • Issued: 07/24/2012
  • Est. Priority Date: 09/05/2008
  • Status: Expired due to Fees
First Claim
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1. A lighting control system receiving power from an AC power source, the lighting control system comprising:

  • a hybrid light source comprising a discrete-spectrum light source circuit having a discrete-spectrum lamp and a continuous-spectrum light source circuit having a continuous-spectrum lamp, the hybrid light source adapted to be coupled to the AC power source and to individually control the amount of power delivered to each of the discrete-spectrum lamp and the continuous-spectrum lamp; and

    a dimmer switch comprising a thyristor adapted to be coupled in series electrical connection between the AC power source and the hybrid light source, the thyristor operable to be rendered conductive for a conduction period each half-cycle of the AC power source, such that the hybrid light source is operable to control the amount of power delivered to each of the discrete-spectrum lamp and the continuous-spectrum lamp in response to the conduction period of the thyristor, the thyristor characterized by a rated latching current;

    wherein the continuous-spectrum light source circuit of the hybrid light source provides a path for enough current to flow from the AC power source through the hybrid light source, such that the magnitude of the current exceeds a rated latching current of the thyristor of the dimmer switch when the thyristor is rendered conductive.

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