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Room and area disinfection utilizing pulsed light with modulated power flux and light systems with visible light compensation between pulses

  • US 10,245,340 B2
  • Filed: 03/09/2017
  • Issued: 04/02/2019
  • Est. Priority Date: 09/18/2014
  • Status: Active Grant
First Claim
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1. A disinfection apparatus, comprising:

  • a germicidal pulsed light source arranged within the disinfection apparatus such that germicidal light generated from the germicidal pulsed light source is projected exterior to the disinfection apparatus;

    trigger voltage circuitry for applying a trigger voltage to the germicidal pulsed light source at a set frequency greater than approximately 20 Hz;

    power supply circuitry;

    one or more electrical charge storage devices coupled to the power supply circuitry and to the germicidal pulsed light source;

    pulse duration circuitry coupled between the one or more electrical charge storage devices and the germicidal pulsed light source, wherein the one or more electrical charge storage devices and the pulse duration circuitry are configured to discharge a set amount of stored energy in a set amount of time such that energy flux of ultraviolet light in the wavelength range between 200 nm and 320 nm generated at the germicidal pulsed light source is between approximately 20 J/m2 and approximately 1000 J/m2;

    an occupancy sensor for determining presence of an individual in a region extending at least 1.0 meter from the disinfection apparatus;

    a processor; and

    program instructions executable by the processor for inhibiting and terminating the generation of light from the germicidal pulsed light source upon the occupancy sensor detecting presence of an individual.

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