Static and mobile disinfection using high intensity narrow wavelength illumination
AssigneeThe Hong Kong University of Science and Technology
InventorsKing Lun Yeung, Qing Chang, Nga Ki Wong, Ning Zhan, Wei Han, Joseph Kai Cho Kwan, Javier Lopez Navas
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Abstract
Microbial disinfection is performed using continuous or intermittent lighting using one or more narrow wavelength light sources. The light sources illuminate with narrow wavelength characteristics. The lighting provides a sufficiently high intensity for rapid microbial disinfection process, while reducing the average energy consumption for microbial disinfection during the microbial disinfection process by targeting multiple cellular sites along different inactivation pathways.
Claims20
Apparatus for providing microbial disinfection, the apparatus comprising:
- a power source providing asynchronous, intermittent power;
- a plurality of narrow wavelength light sources, having a narrow wavelength characteristics consistent with the spectral widths of a group of single color LEDs, driven by the power source and operating at duty cycles corresponding to the asynchronous, intermittent power, said narrow wavelength light sources comprising:
- a single wavelength LED light source having a wavelength range from 465 nm to 475 nm and a spectral width narrower than 100 nm,
- and at least one narrow wavelength light source selected from a group consisting of
- a single wavelength LED light source having a wavelength range from 200 nm to 410 nm and a spectral width narrower than 100 nm, and
- a single wavelength LED light source having a wavelength range from 275 nm to 285 nm and a spectral width narrower than 100 nm;
- a controller operatively connected to the power source and configured to provide the asynchronous, intermittent power, and driving the plurality of light sources to provide asynchronous, intermittent lighting at plural narrow wavelengths to provide a sufficiently high intensity for rapid microbial disinfection process, while reducing the average energy consumption required for microbial disinfection during the microbial disinfection process by targeting multiple cellular sites along different inactivation pathways;
- and
- the controller configured to adjust a frequency, duty cycle, and illumination sequence of the plurality of narrow wavelength light sources.
Apparatus for providing microbial disinfection, the apparatus comprising:
- a power source providing asynchronous, intermittent power;
- at least three narrow wavelength light sources, having a narrow wavelength characteristics consistent with the spectral widths of a group of single color LEDs, driven by the power source and operating at duty cycles corresponding to the asynchronous, intermittent power, said three narrow wavelength light sources comprising:
- a single wavelength LED light source having a wavelength range from 200 nm to 410 nm and a spectral width narrower than 100 nm,
- a single wavelength LED light source having a wavelength range from 275 nm to 285 nm and a spectral width narrower than 100 nm, and
- a single wavelength LED light source having a wavelength range from 465 nm to 475 nm and a spectral width narrower than 100 nm;
- a controller operatively connected to the power source and configured to provide the asynchronous, intermittent power, and driving the three light sources to provide asynchronous, intermittent lighting at three narrow wavelengths to provide a sufficiently high intensity for rapid microbial disinfection process, while reducing the average energy consumption required for microbial disinfection during the microbial disinfection process by targeting multiple cellular sites along different inactivation pathways;
- and
- the controller configured to adjust a frequency, duty cycle, and illumination sequence of the three narrow wavelength light sources.
Dependencies are inferred from the claim text.