WO2022179960A1 - Dispositif susceptible d'émettre une lumière visible et un rayonnement ultraviolet - Google Patents

Dispositif susceptible d'émettre une lumière visible et un rayonnement ultraviolet Download PDF

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Publication number
WO2022179960A1
WO2022179960A1 PCT/EP2022/054176 EP2022054176W WO2022179960A1 WO 2022179960 A1 WO2022179960 A1 WO 2022179960A1 EP 2022054176 W EP2022054176 W EP 2022054176W WO 2022179960 A1 WO2022179960 A1 WO 2022179960A1
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WO
WIPO (PCT)
Prior art keywords
waveguide element
waveguide
outer end
end surface
radiation
Prior art date
Application number
PCT/EP2022/054176
Other languages
English (en)
Inventor
Ties Van Bommel
Rifat Ata Mustafa Hikmet
Original Assignee
Signify Holding B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Signify Holding B.V. filed Critical Signify Holding B.V.
Publication of WO2022179960A1 publication Critical patent/WO2022179960A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/08—Radiation
    • A61L2/10—Ultraviolet radiation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
    • A61L9/18—Radiation
    • A61L9/20—Ultraviolet radiation
    • A61L9/205—Ultraviolet radiation using a photocatalyst or photosensitiser
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • C02F1/325—Irradiation devices or lamp constructions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0075—Arrangements of multiple light guides
    • G02B6/0076—Stacked arrangements of multiple light guides of the same or different cross-sectional area
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
    • A61L2202/10—Apparatus features
    • A61L2202/11—Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/10—Apparatus features
    • A61L2209/12—Lighting means
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/32—Details relating to UV-irradiation devices
    • C02F2201/322—Lamp arrangement
    • C02F2201/3228—Units having reflectors, e.g. coatings, baffles, plates, mirrors
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/10—Photocatalysts
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity

Definitions

  • the present invention relates to a device capable of emitting visible light and ultraviolet (UV) radiation.
  • UV radiation is also useful for production of vitamin D, skin treatment, etc.
  • a device having a source of UV radiation and a source of visible light may be employed, for example in medical facilities.
  • UV radiation with wavelength between 200 nm and 230 nm is currently being considered for use in living environments. UV radiation with wavelengths between 200 nm and 230 nm may provide a germicidal effect by deactivating viruses and killing germs. Furthermore, UV radiation with wavelengths between 200 nm and 230 nm has a low penetration depth in skin and eye tissue of humans.
  • disinfection may be combined with lighting for illumination purposes.
  • one or more lightguides may be used.
  • waveguide and lightguide may be used interchangeably without any loss of generality.
  • most polymer lightguides are not transparent for UV radiation (i.e., they absorb UV radiation). Few materials are transparent for UV radiation.
  • Those polymer lightguides that are transparent for UV radiation may be relatively expensive and/or may not have a sufficient mechanical stability. For example, the lightguide may bend under its own weight.
  • a concern of the present invention is to provide a device capable of providing lighting for illumination purposes as well as a disinfection effect during operation.
  • a further concern of the present invention is to provide such a device at a relatively low cost and/or that has a relatively high mechanical stability.
  • a device may comprise at least a first waveguide element and a second waveguide element.
  • the device may comprise at least a first electromagnetic radiation source (EMS) and a second EMS.
  • the first EMS may be arranged to, in operation, emit visible light.
  • the second EMS may be arranged to, in operation, emit UV radiation.
  • the first EMS may be arranged to, in operation, emit at least a portion of the visible light into the first waveguide element via a first in-coupling surface of the first waveguide element.
  • the first waveguide element may be configured to guide at least a portion of the visible light therein.
  • the first waveguide element may comprise a first out- coupling surface, via which visible light in the first waveguide element is out-coupled from the first waveguide element so as to be emitted by the device.
  • the second EMS may be arranged, in operation, to emit at least a portion of the UV radiation into the second waveguide element via a second in-coupling surface of the second waveguide element.
  • the second waveguide element may be configured to guide at least a portion of the UV radiation therein.
  • the second waveguide element may comprise a second out-coupling surface, via which UV radiation in the second waveguide element is out-coupled from the second waveguide element so as to be emitted by the device. At least a portion of the visible light out-coupled from the first waveguide element may be transmitted through the second light waveguide element so as to be emitted by the device.
  • One or more embodiments of the present invention are based on the idea of providing lighting for illumination purposes as well as a disinfection effect by a device, e.g., by a single device.
  • the device may be configured to emit a combination of visible light out- coupled from the first waveguide element and UV radiation out-coupled from the second waveguide element. By means of UV radiation out-coupled from the second waveguide element, a disinfection effect may be provided.
  • the first waveguide element may for example be configured to guide at least a portion of the visible light therein by way of total internal reflection (TIR).
  • the second waveguide element may for example be configured to guide at least a portion of the UV radiation therein by way of TIR.
  • At least the second electromagnetic radiation source and/or the second waveguide element may be arranged such that all (or substantially all, e.g., more than 90%) of the UV radiation emitted from the device may have been transmitted through the second waveguide element.
  • Some UV radiation may possibly be lost for example due to reflections, which may result in that not all (but perhaps substantially all) of the UV radiation emitted from the device has been transmitted through the second waveguide.
  • the second waveguide element is configured to guide at least a portion of the UV radiation therein by way of TIR, no or almost no UV radiation may be lost. Losses of UV radiation could possibly occur when the UV radiation is out-coupled from the second waveguide element.
  • the reflective UV radiation extraction pattern may give rise to some (little) loss of UV radiation.
  • the device may comprise an optical element, which may be interposed between the first waveguide element and the second waveguide element and which may be arranged to reflect the UV radiation.
  • the optical element may be arranged in relation to the first waveguide element and the second waveguide element, respectively, such that at least a portion of the UV radiation out-coupled from the second waveguide element is reflected by the optical element so as to not impinge on (e.g., not become incident on) the first waveguide element.
  • the first waveguide element, the second waveguide element and possibly the optical element may be interconnected (directly or indirectly).
  • the first waveguide element, the second waveguide element and the optical element By arrangement of the first waveguide element, the second waveguide element and the optical element such that the optical element is interposed between the first waveguide element and the second waveguide element, and by the optical element being arranged to reflect UV radiation, absorption of UV radiation, which has been out-coupled from the second waveguide element, by the first waveguide element may be reduced or even avoided.
  • the second waveguide element could be an add-on module for an existing luminaire or lighting device which includes the first waveguide element.
  • visible light electromagnetic radiation having a wavelength within a range from (e.g., about) 400 nm to (e.g., about) 780 nm.
  • UV radiation electromagnetic radiation having a wavelength within a range from (e.g., about) 10 nm to (e.g., about) 400 nm.
  • the second EMS may for example be arranged to emit UV radiation having a wavelength within a range from (e.g., about) 10 nm to (e.g., about)
  • the UV radiation referred to in the context of the embodiments of the present invention disclosed herein may comprise or be constituted by electromagnetic radiation having wavelength(s) within a range from (e.g., about) 10 nm to (e.g., about) 380 nm.
  • Each or any of the first EMS and the second EMS may for example comprise one or several light-emitting diodes (LEDs). While making reference to “light”, the term LED should in the context of the present application be interpreted as encompassing electromagnetic radiation source(s) capable of emitting electromagnetic radiation for example in a wavelength range of visible light or a wavelength range of UV radiation.
  • the first EMS may for example be configured to emit white light.
  • the optical element may for example be semi-reflective.
  • the optical element may for example comprise a diffuser element and/or a dichroic element.
  • the optical element may not be configured or arranged to reflect any visible light out-coupled from the first waveguide element.
  • the optical element may for example have a form of a film or sheet.
  • the reflectivity of the optical element for UV radiation emitted by the second EMS and/or visible light emitted by the first EMS may for example be in a range from (about) 30% to (about) 80%.
  • the optical element may comprise a pattern comprising reflective pattem(s).
  • the reflective pattem(s) may be in contact with (e.g., the out-coupling surface of) the second waveguide element and may function as outcoupling pattern for out-coupling UV radiation from the second waveguide element (e.g., via the out-coupling surface of the second waveguide element).
  • first waveguide element and the second waveguide element may for example plate-shaped, or disc-shaped.
  • a plate-shaped element and a disc-shaped element it is meant an element that has two major surfaces opposite or substantially opposite to each other and at least one minor surface parallel or substantially parallel to the major surfaces, wherein the major surfaces are shaped as a quadrilateral and a circle or ellipse, respectively, as seen from the above.
  • the first out- coupling surface of the first waveguide element and/or the second out-coupling surface of the second waveguide element may be a portion of or may be constituted by at least one of the major surfaces of the first waveguide element and the second waveguide element, respectively.
  • the device may exhibit relatively large out-coupling surfaces for visible light and/or UV radiation.
  • first in-coupling surface of the first waveguide element and the second in-coupling surface of the second waveguide element may for example comprise one or more in-coupling features, e.g., including or being constituted by one or more surface reliefs and/or microstructures.
  • Each or any of the first out-coupling surface of the first waveguide element and the second out-coupling surface of the second waveguide element may for example comprise one or more out-coupling features (or out-coupling means or out-coupling elements), e.g., including or being constituted by one or more dot patterns, facet structures and/or microstructures on a surface of the first waveguide element or the second waveguide element.
  • the one or more out-coupling features of each or any of the first out-coupling surface of the first waveguide element and the second out-coupling surface of the second waveguide element may for example comprise one or more refractive, diffractive or reflective patterns, e.g., constituted by or comprising reflective dots, on the out-coupling surface.
  • the second waveguide element may be configured to guide UV radiation therein.
  • the second waveguide element may be configured such that UV radiation can pass therethrough.
  • out-coupling surface it is meant a surface wherein electromagnetic radiation, including, e.g., visible light or UV radiation, is or can be out-coupled via at least a portion of the surface.
  • the out- coupling surface may include one or more out-coupling features via which electromagnetic radiation, including, e.g., visible light or UV radiation, is or can be out-coupled, while another or other portions of the out-coupling surface may not permit out-coupling of electromagnetic radiation (or permit out-coupling of electromagnetic radiation to only a relatively small extent (e.g., a selected extent)).
  • the first waveguide element may be configured such that UV radiation cannot be transmitted therethrough, or such that UV radiation can only be transmitted therethrough to a selected extent.
  • the first waveguide element may be configured such that less than 20% of UV radiation impinging on the first waveguide element is transmitted therethrough. More preferably, the first waveguide element may be configured such that less than 10% of UV radiation impinging on the first waveguide element is transmitted therethrough. Most preferably, the first waveguide element may be configured such that less than 2% of UV radiation impinging on the first waveguide element is transmitted therethrough.
  • the first waveguide element may be made from one or more materials which is/are absorbing for the UV radiation while being light transmissive (e.g., transparent) for the visible light.
  • the optical element may be arranged such that at least some of any visible light out-coupled from the first waveguide element and impinging on the optical element is diffused by the optical element.
  • the first waveguide element and the second waveguide element may be made from different material (s).
  • the first waveguide element may be made of rigid material, and the second waveguide element may be made of flexible material.
  • the first waveguide element may for example be made from one or more organic polymeric materials.
  • the first waveguide element is preferably made from Poly(methyl methacrylate) (PMMA), Polyethylene terephthalate (PET), Polycarbonate (PC) and/or Polystyrene (PS).
  • the second waveguide element may for example be made from one or more inorganic materials.
  • the second waveguide element is preferably be made from glass, ceramic and/or quartz.
  • the second waveguide element may for example be made from silicone, sapphire fused silica, calcium fluoride and/or magnesium fluoride.
  • At least the first waveguide element, the second waveguide element and possibly the optical element (and possibly also any other element(s) of the device) may be portions of a single piece.
  • the first waveguide element and the second waveguide element could be portions of a single waveguide (or lightguide).
  • the first waveguide element and the second waveguide element and possibly the optical element may be arranged in a succession, or in a stacked arrangement.
  • the first EMS and the second EMS may be arranged on the same carrier or on different carriers.
  • the carrier(s) may for example comprise one or more printed circuit boards (PCBs).
  • the first EMS and the second EMS may be arranged on a same side of the succession or stacked arrangement.
  • the in-coupling surfaces of the first waveguide element and the second waveguide element may be on a same side or on different sides of the succession or stacked arrangement.
  • the first waveguide element may comprise a first outer end surface at one end of the first waveguide element and a second outer end surface at another end of the first waveguide element.
  • the first waveguide element may comprise an outer circumferential (or lateral) surface, which may extend between the first outer end surface and the second outer end surface.
  • the second waveguide element may comprise a first outer end surface at one end of the second waveguide element and a second outer end surface at another end of the second waveguide element.
  • the second waveguide element may comprise an outer circumferential (or lateral) surface which may extend between the first outer end surface and the second outer end surface.
  • the first waveguide element and the second waveguide element may be arranged in a succession such that the first outer end surface or the second outer end surface of one of the first waveguide element and the second waveguide element is facing in a direction towards the first outer end surface or the second outer end surface of the other one of the first waveguide element and the second waveguide element.
  • the optical element may be interposed between the first waveguide element and the second waveguide element.
  • the first waveguide element, the optical element and the second waveguide element may be arranged in a stacked arrangement such that the first outer end surface or the second outer end surface of the first waveguide element is coupled to the optical element at one side thereof, and the first outer end surface or the second outer end surface of the second waveguide element is coupled to the optical element at another (or the other) side thereof.
  • first outer end surface or the second outer end surface of the first waveguide element may be attached (e.g., by means of gluing) to the optical element at one side thereof, and the first outer end surface or the second outer end surface of the second waveguide element may be attached (e.g., by means of gluing) to the optical element at another (or the other) side thereof.
  • the first outer end surface or the second outer end surface of the first waveguide element may be coupled to the optical element at one side thereof directly (e.g., not via any intermediate parts, portions or elements) or indirectly (e.g., via one or more intermediate parts, portions or elements arranged therebetween).
  • the first outer end surface or the second outer end surface of the second waveguide element may be coupled to the optical element at another (or the other) side thereof directly (e.g., via no intermediate parts, portions or elements) or indirectly (e.g., via one or more intermediate parts, portions or elements arranged therebetween).
  • the first in-coupling surface of the first waveguide element may for example be constituted by at least a portion of the outer circumferential surface of the first waveguide element.
  • the second in-coupling surface of the second waveguide element may for example be constituted by at least a portion of the outer circumferential surface of the second waveguide element.
  • the first out-coupling surface of the first waveguide element may for example be constituted by at least a portion of at least one of the first outer end surface and the second outer end surface of the first waveguide element.
  • the second out- coupling surface of the second waveguide element may for example be constituted by at least a portion of at least one of the first outer end surface and the second outer end surface of the second waveguide element.
  • a thickness of the second waveguide element may be different from a thickness of the first waveguide element.
  • a thickness of the second waveguide element may be smaller than a thickness of the first waveguide element.
  • a thickness of the second waveguide element may for example be less than 70% of a thickness of the first waveguide element.
  • the device may comprise a reflective element.
  • the reflective element may for example be arranged at the one of the first outer end surface and the second outer end surface of the first waveguide element that is not facing towards the second waveguide element.
  • the reflective element may for example have a form of a film or sheet, but another or other shapes are possible.
  • the reflective element may be arranged to reflect visible light out- coupled from the first out-coupling surface of the first waveguide element.
  • the device may comprise a photocatalytic element.
  • the photocatalytic element may be configured to act as a photocatalyst upon being exposed to at least one of the visible light out-coupled from the out-coupling surface of the first waveguide element or the UV radiation out-coupled from the out-coupling surface of the second waveguide element.
  • the photocatalytic element may improve the disinfection effect of the device.
  • the photocatalytic element may for example comprise a solid semiconductor catalyst, which, during the process of photocatalysis, generates reactive oxygen species on a surface of the catalyst when exposed to electromagnetic radiation of appropriate wavelength, e.g., when exposed to at least one of the visible light out-coupled from the out-coupling surface of the first waveguide element or the UV radiation out-coupled from the out-coupling surface of the second waveguide element.
  • the reactive oxygen species in turn may reduce and oxidize compounds which are adsorbed on the catalyst surface.
  • the photocatalytic element may for example be arranged at the one of the first outer end surface and the second outer end surface of the second waveguide element that is not facing towards the first waveguide element.
  • the photocatalytic element may be arranged to receive at least one of the visible light out-coupled from the first out-coupling surface of the first waveguide element or the UV radiation out- coupled from the second out-coupling surface of the second waveguide element.
  • the photocatalytic element may for example have a form of a film or sheet, but another or other shapes are possible.
  • the second waveguide element may be connected or attached to (e.g., by means of gluing) to the optical element and/or the photocatalytic element. This may improve the mechanical stability of the second waveguide element.
  • Each or any of the first out-coupling surface of the first waveguide element and the second out-coupling surface of the second waveguide element may comprise one or more out-coupling features.
  • the one or more out-coupling features of the first out-coupling surface of the first waveguide element and/or the one or more out-coupling features of the second out-coupling surface of the second waveguide element may be configured such that an emission of visible light from the first waveguide element has a higher uniformity than an emission of UV radiation from the second waveguide element.
  • the one or more out-coupling features of the first out-coupling surface of the first waveguide element may be configured such that an emission of visible light from the first waveguide element has a selected uniformity
  • the one or more out-coupling features of the second out-coupling surface of the second waveguide element may be configured such that an emission of UV radiation from the second waveguide element is non-uniform, or substantially non-uniform.
  • out-coupling features of the first out-coupling surface of the first waveguide element may for example be distributed evenly over the entirety of, or over substantially the entirety of, the first out-coupling surface of the first waveguide element.
  • relatively few out-coupling features may be arranged only on a relatively small portion of the second out-coupling surface of the second waveguide element (e.g., on a portion of the second out-coupling surface of the second waveguide element at the center of the second out-coupling surface of the second waveguide element), for example.
  • the device may comprise a housing.
  • the housing may be configured to accommodate at least the first waveguide element and the second waveguide element in an interior of the housing.
  • the housing may be connected to at least the second waveguide element.
  • a part or portion of the housing e.g., a rim thereol
  • the second waveguide element may be mechanically attached to the first waveguide element.
  • a relatively high mechanical stability of the second waveguide element may be achieved.
  • a grid may cover at least a portion of the second waveguide element.
  • Fig. 1 is a schematic exploded view of a device according to an embodiment of the present invention.
  • FIG. 2 and 3 is a schematic sectional side view of a device according to an embodiment of the present invention.
  • Figure 1 is a schematic exploded view of a device 1 according to an embodiment of the present invention.
  • the device 1 comprises a first waveguide element 2 and a second waveguide element 3.
  • first waveguide element 2 and a second waveguide element 3.
  • each of the first waveguide element 2 and the second waveguide element 3 is plate-shaped.
  • the device 1 comprises a first electromagnetic radiation source (EMS) 4 and a second EMS 5. It is to be understood that the device 1 could comprise more than two waveguide elements and/or more than two EMSs.
  • EMS electromagnetic radiation source
  • the first EMS 4 is arranged to, in operation, emit visible light.
  • the second EMS 5 is arranged to, in operation, emit ultraviolet (UV) radiation.
  • the first EMS 4 is arranged, in operation, to emit at least a portion of the visible light into the first waveguide element 2 via an in-coupling surface of the first waveguide element 2.
  • the first waveguide element 2 comprises a first outer end surface 7 at one end of the first waveguide element 2 and a second outer end surface 8 at another end of the first waveguide element 2, and an outer circumferential surface 6 extending between the first outer end surface 7 and the second outer end surface 8.
  • the in-coupling surface of the first waveguide element 2 is constituted by the outer circumferential surface 6 of the first waveguide element
  • the in-coupling surface of the first waveguide element 2 may in the following also be referenced by the reference numeral 6.
  • the first waveguide element 2 is configured to guide at least a portion of the visible light therein.
  • the first waveguide element 2 comprises an out-coupling surface via which visible light in the first waveguide element 2 is out-coupled from the first waveguide element 2 so as to be emitted by the device 1.
  • the out-coupling surface of the first waveguide element 2 is constituted by at least one of the first outer end surface 7 and the second outer end surface 8 of the first waveguide element 2.
  • the out-coupling surface of the first waveguide element 2 will in the following be referenced by the reference numerals 7, 8.
  • the second EMS 5 is arranged, in operation, to emit at least a portion of the UV radiation into the second waveguide element 3 via an in-coupling surface of the second waveguide element 3.
  • the second waveguide element 3 comprises a first outer end surface 10 at one end of the second waveguide element 3 and a second outer end surface 11 at the other end of the second waveguide element 3, and an outer circumferential surface 9 extending between the first outer end surface 10 and the second outer end surface 11.
  • the in-coupling surface of the second waveguide element 3 is constituted by the outer circumferential surface 9 of the second waveguide element 3.
  • the in-coupling surface of the second waveguide element 3 may in the following also be referenced by the reference numeral 9.
  • the second waveguide element 3 is configured to guide at least a portion of the UV radiation therein.
  • the second waveguide element 3 comprises an out-coupling surface, via which UV radiation in the second waveguide element 3 is out-coupled from the second waveguide element 3 so as to be emitted by the device 1.
  • the out-coupling surface of the second waveguide element 3 is constituted by at least one of the first outer end surface 10 and the second outer end surface 11 of the second waveguide element 3.
  • the out-coupling surface of the second waveguide element 3 will in the following be referenced by the reference numerals 10, 11.
  • At least a portion of the visible light out-coupled from the first waveguide element 2 is transmitted through the second light waveguide element 3 so as to be emitted by the device 1.
  • the device 1 comprises an optical element 12, which is interposed between the first waveguide element 2 and the second waveguide element 3, and which is arranged to reflect UV radiation.
  • the optical element 12 may have a form of a film or sheet, but another or other shapes are possible.
  • the optical element 12 is arranged in relation to the first waveguide element 2 and the second waveguide element 3, respectively, such that at least some of any UV radiation out-coupled from the second waveguide element 3 is reflected by the optical element 12 so as to not impinge on the first waveguide element 2.
  • the optical element 12 is optional, and may be omitted. In that case, the first waveguide element 2 may be adjacent the second waveguide element 3.
  • the out-coupling surface 7, 8 of the first waveguide element 2 may comprise one or more out-coupling features, schematically indicated in Figure 1 at 15. It is to be understood that the out-coupling features 15 are only very schematically illustrated in Figure 1, and that the position(s) of the out-coupling features on the first waveguide element 2 and surface area of the first waveguide element 2 on which out-coupling features are arranged generally differ from that illustrated in Figure 1. Also, while Figure 1 illustrates the out- coupling features 15 as a dot pattern, it is to be understood that this is according to an example and that variations are possible. For example, the out-coupling features 15 could in alternative or in addition comprise facet structures and/or microstructures on a surface of the first waveguide element 2.
  • the out-coupling surface 10, 11 of the second waveguide element 3 may comprise one or more out-coupling features, schematically indicated in Figure 1 at 16. It is to be understood that the out-coupling features 16 are only very schematically illustrated in Figure 1, and that the position(s) of the out-coupling features on the second waveguide element 3 and surface area of the second waveguide element 3 on which out-coupling features are arranged generally differ from that illustrated in Figure 1. Also, while Figure 1 illustrates the out-coupling features 16 as a dot pattern, it is to be understood that this is according to an example and that variations are possible. For example, the out-coupling features 16 could in alternative or in addition comprise facet structures and/or microstructures on a surface of the second waveguide element 3.
  • the out-coupling features 15 of the out-coupling surface 7, 8 of the first waveguide element 2 and/or the out-coupling features 16 of the out-coupling surface 10, 11 of the second waveguide element 3 may be configured such that an emission of visible light from the first waveguide element 2 has a higher uniformity than an emission of UV radiation from the second waveguide element 3.
  • the first waveguide element 2 and the second waveguide element 3 are arranged in a succession such that the first outer end surface 7 of the first waveguide element 2 is facing in a direction towards the second outer end surface 11 of the second waveguide element 3.
  • the first waveguide element 2, the optical element 12 and the second waveguide element 3 may be arranged in a stacked arrangement, such that the first outer end surface 7 of the first waveguide element 2 is coupled to the optical element 12 at one side thereof, and the second outer end surface 11 of the second waveguide element 3 is coupled to the optical element 12 at the other side thereof.
  • Each or any of the first EMS 4 and the second EMS 5 may for example comprise one or several light-emitting diodes (LEDs).
  • LED should in the context of the present application be interpreted as encompassing electromagnetic radiation source(s) capable of emitting electromagnetic radiation for example in a wavelength range of visible light or a wavelength range of UV radiation.
  • the first EMS 4 may for example be configured to emit white light. While the first EMS 4 and the second EMS 5 are illustrated in Figure 1 as having a tubular shape, it is to be understood that such a shape is exemplifying and that another or other shapes of the first EMS 4 and/or the second EMS 5 are possible.
  • the device 1 comprises a reflective element 13, which is arranged to reflect visible light out-coupled from the out-coupling surface 7, 8 of the first waveguide element 2.
  • the reflective element 13 may for example be arranged at the second outer end surface 8 of the first waveguide element 2.
  • the reflective element 13 may for example have a form of a film or sheet, but another or other shapes are possible.
  • the reflective element 13 is optional and may be omitted.
  • the device 1 comprises a photocatalytic element 14.
  • the photocatalytic element 14 is configured to act as a photocatalyst upon being exposed to at least one of the visible light out-coupled from the out-coupling surface 7, 8 of the first waveguide element 2 or the UV radiation out-coupled from the out-coupling surface 10, 11 of the second waveguide element 3.
  • the photocatalytic element 14 may for example have a form of a film or sheet, but another or other shapes are possible.
  • the photocatalytic element 14 is optional and may be omitted.
  • Figure 2 is a schematic sectional side view of a device 1 according to an embodiment of the present invention.
  • Figure 2 illustrates a section of a device 1 according to the exploded view in Figure 1 but with the elements of the device 1 being interconnected.
  • the same reference numerals in Figures 1 and 2 denote the same or similar elements or components, having the same or similar functions.
  • Figure 3 is a schematic sectional side view of a device 1 according to an embodiment of the present invention.
  • the device 1 illustrated in Figure 3 is similar to the device 1 illustrated in Figure 2, and the same reference numerals in Figures 2 and 3 denote the same or similar elements or components, having the same or similar functions.
  • the device 1 illustrated in Figure 3 further comprises a housing, schematically illustrated in Figure 3 at 17.
  • the housing 17 may be configured to accommodate at least the first waveguide element 2, the second waveguide element 3 and the optical element 12, and possibly also the reflective element 13 and/or the photocatalytic element 14, in an interior of the housing 17.
  • the housing 17 may be connected to at least the second waveguide element increasing mechanical stability of the second waveguide element 3.
  • the relative dimensions of the elements of the device 1 illustrated in Figures 2 and 3 are not necessarily accurately depicted in Figures 2 and 3. Rather, Figures 2 and 3 are intended to illustrate the arrangement of the elements of the device 1 in relation to each other.
  • the thickness of the second waveguide element 3 may be smaller than the thickness of the first waveguide element 2.
  • the respective thicknesses of the optical element 12, the reflective element 13 and the photocatalytic element 14 may generally be (much) smaller than the thicknesses of the first waveguide element 2 and the second waveguide element 3.
  • a device comprising at least a first waveguide element and a second waveguide element, and at least a first EMS and a second EMS.
  • the first EMS is arranged to, in operation, emit visible light
  • the second EMS is arranged to, in operation, emit UV radiation.
  • the first EMS is arranged to, in operation, emit at least a portion of the visible light into the first waveguide element, wherein the first waveguide element is configured to guide at least a portion of the visible light therein, and wherein visible light in the first waveguide element is or can be out-coupled from the first waveguide element.
  • the second EMS is arranged, in operation, to emit at least a portion of the UV radiation into the second waveguide element, wherein the second waveguide element is configured to guide at least a portion of the UV radiation therein, and wherein UV radiation in the second waveguide element is or can be out-coupled from the second waveguide element. At least a portion of the visible light out-coupled from the first waveguide element is transmitted through the second light waveguide element so as to be emitted by the device.

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Abstract

L'invention concerne un dispositif (1). Le dispositif (1) comprend au moins un premier élément de guide d'ondes (2) et un second élément de guide d'ondes (3) et au moins une première source de rayonnement électromagnétique, EMS, (4) et une seconde EMS (5). La première EMS (4) est agencée pour, en fonctionnement, émettre de la lumière visible et la seconde EMS (5) est agencée pour, en fonctionnement, émettre un rayonnement ultraviolet, UV. La première EMS (4) est agencée pour, en fonctionnement, émettre au moins une partie de la lumière visible dans le premier élément de guide d'ondes (2), le premier élément de guide d'ondes (2) étant conçu pour guider au moins une partie de la lumière visible à l'intérieur de celui-ci et la lumière visible dans le premier élément de guide d'ondes (2) étant ou pouvant être découplée du premier élément de guide d'ondes (2). La seconde EMS (5) est agencée, en fonctionnement, pour émettre au moins une partie du rayonnement UV dans le second élément de guide d'ondes (3), le second élément de guide d'ondes (3) étant conçu pour guider au moins une partie du rayonnement UV à l'intérieur de celui-ci et un rayonnement UV dans le second élément de guide d'ondes (3) étant ou pouvant être découplé du second élément de guide d'ondes (3). Au moins une partie de la lumière visible découplée du premier élément de guide d'ondes (2) est transmise à travers le second élément de guide d'ondes de lumière (3) de façon à être émise par le dispositif (1).
PCT/EP2022/054176 2021-02-25 2022-02-21 Dispositif susceptible d'émettre une lumière visible et un rayonnement ultraviolet WO2022179960A1 (fr)

Applications Claiming Priority (2)

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EP21159139 2021-02-25
EP21159139.1 2021-02-25

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130045132A1 (en) * 2011-08-16 2013-02-21 Microsoft Corporation Disinfecting touch-based screen automatically
US20150250907A1 (en) * 2014-03-07 2015-09-10 Sensor Electronic Technology, Inc. Ultraviolet Surface Illuminator
US20160033714A1 (en) * 2014-01-28 2016-02-04 Boe Technology Group Co., Ltd. Backlight module and display device
CN110045545A (zh) * 2019-05-17 2019-07-23 上海中航光电子有限公司 显示装置
CN110488540A (zh) * 2019-08-30 2019-11-22 上海中航光电子有限公司 一种显示装置
DE202020103590U1 (de) * 2020-05-12 2020-07-21 Luminator Holding Lp UV-Desinfektion von berührungsintensiven Oberflächen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130045132A1 (en) * 2011-08-16 2013-02-21 Microsoft Corporation Disinfecting touch-based screen automatically
US20160033714A1 (en) * 2014-01-28 2016-02-04 Boe Technology Group Co., Ltd. Backlight module and display device
US20150250907A1 (en) * 2014-03-07 2015-09-10 Sensor Electronic Technology, Inc. Ultraviolet Surface Illuminator
CN110045545A (zh) * 2019-05-17 2019-07-23 上海中航光电子有限公司 显示装置
CN110488540A (zh) * 2019-08-30 2019-11-22 上海中航光电子有限公司 一种显示装置
DE202020103590U1 (de) * 2020-05-12 2020-07-21 Luminator Holding Lp UV-Desinfektion von berührungsintensiven Oberflächen

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