WO2022190802A1 - 不活化機能付き照明装置 - Google Patents
不活化機能付き照明装置 Download PDFInfo
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- WO2022190802A1 WO2022190802A1 PCT/JP2022/006308 JP2022006308W WO2022190802A1 WO 2022190802 A1 WO2022190802 A1 WO 2022190802A1 JP 2022006308 W JP2022006308 W JP 2022006308W WO 2022190802 A1 WO2022190802 A1 WO 2022190802A1
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- light source
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- 230000002779 inactivation Effects 0.000 title claims abstract description 9
- 230000009849 deactivation Effects 0.000 claims description 25
- 238000005286 illumination Methods 0.000 claims description 21
- 238000000605 extraction Methods 0.000 claims description 17
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Images
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B35/00—Electric light sources using a combination of different types of light generation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
- F21V33/0064—Health, life-saving or fire-fighting equipment
-
- 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
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
- F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
- F21K9/233—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
- F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
- F21K9/238—Arrangement or mounting of circuit elements integrated in the light source
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
- F21S8/026—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
- F21V33/0064—Health, life-saving or fire-fighting equipment
- F21V33/0068—Medical equipment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/06—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for filtering out ultraviolet radiation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/20—Dichroic filters, i.e. devices operating on the principle of wave interference to pass specific ranges of wavelengths while cancelling others
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/385—Switched mode power supply [SMPS] using flyback topology
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/105—Controlling the light source in response to determined parameters
- H05B47/115—Controlling the light source in response to determined parameters by determining the presence or movement of objects or living beings
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
- F21W2131/20—Lighting for medical use
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2113/00—Combination of light sources
- F21Y2113/30—Combination of light sources of visible and non-visible spectrum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the present invention relates to a lighting device, and more particularly to a lighting device equipped with a fungus or virus inactivation function.
- Patent Literature 1 discloses the structure of a spotlight-type illumination device using an LED light source.
- LED light sources are also being used not only in spotlight-type lighting devices, but also in so-called downlight-type lighting devices in which a part of the device is embedded in a ceiling plate or the like. .
- bacteria bacteria or viruses
- a method of irradiating with ultraviolet rays is known to inactivate the bacteria that exist in the space.
- a sterilization lamp that emits ultraviolet light with a wavelength of 254 nm and a fluorescent lamp that emits light for illumination are provided for use in places such as kitchens where food is handled on a daily basis.
- a germicidal lamp-embedded lighting fixture has been proposed, which is embedded in a body-shaped fixture body.
- ultraviolet light that exhibits high light intensity in the wavelength range of 240 nm to 300 nm has the risk of affecting the human body when irradiated.
- the skin is divided into three parts, starting from the surface, the epidermis, dermis, and the subcutaneous tissue, and the epidermis has four parts, the stratum corneum, the stratum granulosum, the stratum spinosum, and the stratum basale, starting from the surface. divided into layers.
- the human body When the human body is irradiated with ultraviolet light that exhibits high light intensity in the wavelength range of 240 nm to 300 nm, including the wavelength of 254 nm as a germicidal ray, it penetrates the stratum corneum and reaches the stratum granulosum, stratum spinosum, and in some cases the stratum basale. , is absorbed into the cellular DNA present in these layers. This results in the risk of skin cancer.
- an excimer lamp filled with a luminous gas containing KrCl or KrBr provides ultraviolet rays having a peak wavelength in the wavelength range of 200 nm to 230 nm, that is, ultraviolet rays with little risk to the human body. Therefore, it is conceivable that by realizing a lighting device equipped with such an excimer lamp together with an LED light source for lighting, it is possible to inactivate bacteria and the like in the space while illuminating the space.
- UVC light source a light source that emits ultraviolet light
- an excimer lamp hereinafter referred to as a "UVC light source”
- an inverter circuit is essential.
- An AC/DC converter is required to generate a DC voltage from the commercial voltage. Therefore, when both the LED light source for illumination and the UVC light source for deactivation are mounted in the same device, it is necessary to mount many circuits for lighting. As a result, there is a risk that the size of the lighting device will increase.
- the size and shape of general lighting devices are generally regulated. For this reason, it is not desirable to increase the size of the lighting device for the reason of incorporating the UVC light source in the lighting device.
- the situation becomes conspicuous. In other words, it is preferable to realize a lighting device equipped with a deactivation function without substantially changing the size and shape of the conventional lighting device.
- the lamp as the UVC light source (the excimer lamp in the example above) has a shorter life than the LED light source for illumination, it is expected to be replaced at shorter time intervals than the LED light source. Since spotlights and downlights are generally installed on the ceiling and used, an increase in the overall size of the lighting apparatus may make it more difficult to replace the lamps.
- the lighting device with a deactivation function is a UVC light source that emits ultraviolet rays having a peak wavelength in the wavelength range of 200 nm to 230 nm; an LED light source that emits visible light; a single AC/DC converter that is connected to an external power source and converts an AC voltage derived from the external power source into a DC voltage and outputs the DC voltage; a UVC light source circuit unit that converts the DC voltage output from the AC/DC converter into a voltage for lighting the UVC light source and supplies the DC voltage to the UVC light source; and an LED light source circuit unit that converts the DC voltage output from the AC/DC converter into a current for lighting the LED light source and supplies the current to the LED light source.
- inactivation refers to a comprehensive concept that kills bacteria and viruses or loses their infectivity and toxicity.
- bacteria refers to microorganisms such as bacteria and fungi.
- a lamp as a UVC light source requires a high voltage when lighting, so an inverter circuit is essential. Then, an AC/DC converter is required for generating a DC voltage to be input to the inverter circuit from an external power supply voltage (generally commercial voltage).
- an LED light source that emits visible light requires a direct current for lighting, and thus requires an AC/DC converter for generating a direct current (direct current voltage) from a commercial voltage.
- the inverter circuit of the UVC light source imposes a limit on the size of the allowable input voltage.
- the conventional ultraviolet illuminator equipped with a UVC light source is an AC/DC converter (here, for the sake of convenience, “AC/ (referred to as a "DC converter").
- an LED light source usually incorporates a plurality of LED elements, and the required amount of DC voltage is determined by the number of LED elements, that is, the light output.
- a conventional lighting device equipped with an LED light source is an AC/DC converter (here, for convenience, (referred to as "LED light source AC/DC converter").
- the lighting device with deactivation function having the above configuration, it is equipped with a single AC/DC converter that generates a DC voltage from an external power supply. Then, in the UVC light source circuit unit, the DC voltage output from the AC/DC converter is converted into a voltage for lighting the UVC light source and output, and in the LED light source circuit unit, the DC voltage is converted into a current for lighting the LED light source. converted to and output.
- an AC/DC converter with a large number of circuits can be shared, so that the circuit scale for lighting can be made equal to that of a conventional LED lighting device while both the UVC light source and the LED light source are mounted.
- the ultraviolet rays emitted from the lighting device with an inactivation function according to the present invention do not cause erythema or keratitis in the skin or eyes of humans or animals, and provide the inherent sterilization and virus inactivation capabilities of ultraviolet rays. be able to.
- unlike conventional UV light sources such as low-pressure mercury lamps, it can be used in manned environments. It is possible to provide virus suppression and sterilization on the surface of the member. This corresponds to Goal 3 of the United Nations-led Sustainable Development Goals (SDGs), "Ensure healthy lives and promote well-being for all at all ages", and also to Target 3.3. It will make a significant contribution to “by 2030, end epidemics such as AIDS, tuberculosis, malaria and neglected tropical diseases, and combat hepatitis, water-borne diseases and other communicable diseases”.
- SDGs United Nations-led Sustainable Development Goals
- the LED light source includes an LED element group in which a plurality of LED elements are connected in series in one row or a plurality of rows connected in parallel, A voltage across the LED element group is lower than the DC voltage output from the AC/DC converter,
- the LED light source circuit section may include a resistance component.
- a DC voltage based on the voltage across the plurality of LED element groups connected in series is applied to the LED light source.
- This voltage across both ends depends on the number of LED elements connected in series. This number of elements is set according to the brightness and standard of the LED light source required by the consumer, and it is basically difficult for the manufacturer to freely change the number for each device.
- the DC voltage to be input to the inverter for lighting the UVC light source may be higher than the voltage across the LED element group.
- the DC voltage output from the AC/DC converter is supplied to the LED light source as it is, the current flowing through each LED element becomes too higher than the rated current, which may damage the LED light source.
- the LED light source circuit section including a resistance component between the AC/DC converter and the LED light source as in the above configuration, the amount of current supplied to the LED light source is reduced. be.
- the LED light source circuit section can be realized by including a resistance component as a minimum additional element compared to the circuit for lighting the conventional UVC light source.
- the size of the device can be greatly reduced compared to the case where AC/DC converters for each light source are provided.
- the LED light source includes an LED element group in which a plurality of LED elements are connected in series in one row or a plurality of rows connected in parallel, The voltage across the LED element group is higher than the DC voltage output from the AC/DC converter,
- the LED light source circuit section may include a DC/DC converter that boosts the DC voltage output from the AC/DC converter.
- the voltage across the LED element group may be lower than the DC voltage that should be input to the inverter for lighting the UVC light source.
- the current flowing through each LED element becomes too much lower than the rated current, and the maximum brightness of the LED light source may decrease.
- the current flowing through the LED elements does not reach the threshold current in the first place, and each LED element does not emit light.
- an LED light source circuit unit including a DC/DC converter that boosts the DC voltage output from the AC/DC converter between the AC/DC converter and the LED light source.
- the amount of current supplied to the LED light source can be increased to the rated value.
- the LED light source circuit section can be realized by including a DC/DC converter, unlike the circuit for lighting the conventional UVC light source.
- a DC/DC converter does not require a rectifier circuit or a transformer, which have a large number of parts, and can be realized with an extremely simple circuit.
- the size of the device can be greatly reduced compared to the case where AC/DC converters for each light source are provided.
- the LED light source circuit section may include a resistance component arranged between the output terminal of the DC/DC converter and the LED light source.
- the illumination device with a deactivation function may include a housing that accommodates the UVC light source and the LED light source.
- a lighting device equipped with a deactivation function is realized with a single lighting device.
- the UVC light source circuit section and the LED light source circuit section are mounted on the same substrate from the viewpoint of further reducing the size of the apparatus.
- the LED light source circuit section may include a control section for realizing a dimming function for the LED light source.
- the housing has a common light extraction surface for extracting both the ultraviolet rays emitted from the UVC light source and the visible light emitted from the LED light source, and has a spotlight or downlight shape. It does not matter if it presents
- the space to be illuminated is illuminated by visible light, and the same space is illuminated by ultraviolet light. Bacteria and the like can be inactivated.
- the UVC light source may be provided with a filter member that suppresses the light intensity of components belonging to a wavelength range exceeding 240 nm in the ultraviolet rays.
- the ultraviolet rays emitted from the same light source show almost no light intensity in the wavelength region exceeding 240 nm.
- this ultraviolet light may exhibit light intensity in a wavelength region exceeding 240 nm at an extremely low ratio (less than 10%) to the light intensity of the peak wavelength.
- a filter member for example, a wavelength selection filter that transmits ultraviolet rays in the wavelength range of 200 nm to 230 nm and blocks ultraviolet rays in the wavelength range of 240 nm to 280 nm can be used.
- a wavelength selection filter for example, a dielectric multilayer filter formed by laminating an HfO 2 layer and an SiO 2 layer is used.
- FIG. 1 is a cross-sectional view schematically showing the configuration of an embodiment of a lighting device with a deactivation function of the present invention
- FIG. FIG. 2 is a schematic plan view of the light extraction surface of the lighting device with a deactivation function in FIG. 1 when viewed in the +Z direction
- 1 is a side view schematically showing the structure of an excimer lamp as an example of a UVC light source
- FIG. 3 is a schematic plan view of the UVC light source when viewed in the axial direction of the arc tube
- FIG. 4 is a circuit block diagram schematically showing the configuration of a lighting circuit included in the lighting device with a deactivation function
- It is a circuit configuration example of an AC/DC converter.
- FIG. 3 is a circuit block diagram schematically showing another configuration of a lighting circuit included in the lighting device with a deactivation function; It is a circuit configuration example of an AC/DC converter.
- FIG. 3 is a perspective view schematically showing the configuration of another embodiment of the lighting device with a deactivation function of the present invention.
- the lighting device with a deactivation function may be simply abbreviated as "lighting device”.
- FIG. 1 is a schematic cross-sectional view of the lighting device of this embodiment.
- the illumination device 1 shown in FIG. 1 is assumed to be a downlight-type illumination device mounted on the ceiling.
- the illumination device 1 includes a housing 4, which accommodates a UVC light source 2 that emits ultraviolet light L2 and an LED light source 3 that emits visible light L3.
- a UVC light source 2 that emits ultraviolet light L2
- an LED light source 3 that emits visible light L3.
- FIG. 1 it is assumed that the lighting device 1 is installed on the ceiling (not shown) located on the +Z side with respect to the lighting device 1 and emits light (L2, L3) in the -Z direction. .
- an X-Y-Z coordinate system in which a plane perpendicular to the Z direction is the XY plane will be referred to as appropriate.
- circuits (6, 12, 13) for turning on the light sources (2, 3) are housed in the upper region 4a located on the +Z side, and circuits (6, 12, 13) are housed in the lower region 4b located on the -Z side. houses each light source (2, 3).
- Each region (4a, 4b) of the housing 4 is, for example, cylindrical and both are coaxially arranged.
- An example of the dimensions of the housing 4 is that the upper region 4a has an outer diameter of 200 mm square and a height of 100 mm, and the lower region 4b has an outer diameter of 400 mm square and a height of 50 mm.
- the AC/DC converter 6 is a circuit that converts a commercial AC voltage (for example, AC200V, AC100V, etc.) into a DC voltage.
- the UVC light source circuit unit 12 is a circuit that converts the DC voltage generated by the AC/DC converter 6 into a voltage for lighting the UVC light source 2 (voltage V2 in FIG. 5 to be described later).
- the LED light source circuit unit 13 is a circuit that converts the DC voltage generated by the AC/DC converter 6 into a current for lighting the LED light source 3 (current I3 in FIG. 5 to be described later). In this embodiment, as shown in FIG.
- the UVC light source circuit section 12 and the LED light source circuit section 13 are mounted on the same substrate 10, but this is an example.
- the AC/DC converter 6 may also be mounted on the substrate 10 .
- the size of the illumination device 1 is further reduced. A detailed description of the AC/DC converter 6, the UVC light source circuit section 12, and the LED light source circuit section 13 will be given later.
- UVC light source 2 In the lower region 4b of the housing 4, there are a UVC light source 2, an LED light source 3, and light for extracting the light (L2, L3) emitted from these light sources (2, 3) to the outside of the lighting device 1.
- a take-out surface 5 is arranged.
- the illumination device 1 of this embodiment has a light extraction surface 5 on the ⁇ Z side of the housing 4 .
- the light extraction surface 5 includes an area 5a for extracting the ultraviolet light L2 emitted from the UVC light source 2 and an area 5b for extracting the visible light L3 emitted from the LED light source 3.
- FIG. 2 is a schematic plan view of the light extraction surface 5 viewed in the +Z direction.
- the light extraction surface 5 included in the illumination device 1 of the present embodiment has a configuration in which a region 5b for extracting the visible light L3 is provided outside the region 5a for extracting the ultraviolet rays L2. As a result, the light distribution angle of the visible light L3 is widened, and while the target space is more efficiently illuminated, the target space can be deactivated.
- the aspect of the light extraction surface 5 included in the illumination device 1 is not limited. That is, in FIG. 2, the positional relationship between the region 5a for extracting the ultraviolet light L2 and the region 5b for extracting the visible light L3 may be reversed, and the region 5a and the region 5b may be arranged in the X direction or the Y direction. They may be arranged adjacent to each other. Furthermore, the regions 5a and 5b may be arranged on different planes. More specifically, the illumination device 1 includes a light extraction surface 5a for ultraviolet rays L2 and a light extraction surface 5b for visible light L3, and these light extraction surfaces (5a, 5b) are located on the housing 4, respectively. They may be provided at different positions.
- the visible light L3 is diffused and irradiated into the target space by providing a diffusing member particularly in the region 5b of the light extraction surface 5.
- the UVC light source 2 is composed of an excimer lamp. More specifically, as schematically shown in FIG. 3, the UVC light source 2 includes an arc tube 21 and a pair of electrodes (22, 22). FIG. 3 is a schematic side view of the UVC light source 2 composed of an excimer lamp.
- the UVC light source 2 shown in FIG. 3 has a pair of electrodes (22, 22) arranged so as to be in contact with the outer surface of the arc tube 21 of the excimer lamp.
- the pair of electrodes ( 22 , 22 ) are arranged at positions separated from each other in the axial direction of the arc tube 21 .
- the pair of electrodes ( 22 , 22 ) are made of a conductive material, preferably a material that reflects the ultraviolet rays L 2 emitted from the arc tube 21 .
- the pair of electrodes (22, 22) are both made of Al, Al alloy, stainless steel, or the like.
- the luminous gas G20 is enclosed in the arc tube 21 of the excimer lamp.
- a high-frequency AC voltage of, for example, several kHz to 5 MHz is applied between the pair of electrodes (22, 22) from the UVC light source circuit unit 12, the luminous gas G20 is generated through the arc tube 21 of the excimer lamp. The voltage is applied to it.
- a discharge plasma is generated in the discharge space in which the luminescence gas G20 is sealed, and the atoms of the luminescence gas G20 are excited to enter an excimer state, and excimer luminescence occurs when these atoms transition to the ground state.
- the luminous gas G20 is made of a material that emits ultraviolet light L2 having a peak wavelength in the wavelength range of 200 nm to 230 nm during excimer light emission.
- the luminescence gas G20 includes KrCl and KrBr.
- the arc tube 21 of the excimer lamp when KrCl is contained in the luminous gas G20, the arc tube 21 of the excimer lamp emits ultraviolet rays L2 with a peak wavelength of about 222 nm.
- the luminous gas G20 contains KrBr
- the arc tube 21 of the excimer lamp emits ultraviolet rays L2 having a peak wavelength of about 207 nm.
- the description of the peak wavelength of the KrCl excimer lamp as "around 222 nm" is intended to include individual differences in excimer lamp products, and 222.0 nm is of course the absolute meaning, and 222.0 nm is the standard. is intended to allow a wavelength shift within the range of ⁇ 3.0 nm. The same is true for KrBr excimer lamps.
- a phosphor (not shown) may be arranged on the tube wall of the arc tube 21 .
- the luminous gas G20 enclosed in the luminous tube 21 of the UVC light source 2 may have a peak wavelength of less than 200 nm of ultraviolet rays emitted during excimer luminescence.
- the phosphor may be a material that converts incident excimer light into light (ultraviolet light) having a peak wavelength in the wavelength range of 200 nm to 230 nm.
- the light emission gas G20 a gas of a material that emits excimer light with a peak wavelength of less than 200 nm, such as Xe or ArF, can be used.
- LaPO 4 :Pr, K 2 YF 5 :Pr, LaF 3 :Nd, or the like can be used as the phosphor.
- the UVC light source 2 may include multiple excimer lamps.
- FIG. 4 is a schematic plan view of the UVC light source 2 viewed in the axial direction of the arc tube 21 of the excimer lamp when a plurality of excimer lamps are aligned in a predetermined direction. Although only one electrode 22 in contact with the outer wall of each arc tube 21 is shown in FIG. is assumed to exist.
- the ultraviolet light L2 emitted from the UVC light source 2 is extracted to the outside of the illumination device 1 from the region 5a of the light extraction surface 5.
- the ultraviolet light L2 has a peak wavelength within the range of 200 to 230 nm, and most of the wavelength region exceeding 240 nm is light. show no strength.
- the ultraviolet rays L2 may show a very small light intensity even in the wavelength region exceeding 240 nm. Therefore, as shown in FIG.
- a filter member 25 may be provided.
- the UVC light source 2 is realized by coating the tube wall of the arc tube 21 with a phosphor, it is preferable to provide the filter member 25 .
- the filter member 25 may be designed to block ultraviolet rays L2 having a wavelength of less than 200 nm. By suppressing the emission of the ultraviolet rays L2 in this wavelength band into the target space, it is possible to prevent the generation of ozone in the target space. If the UVC light source 2 does not include the filter member 25 that blocks the ultraviolet rays L2 with a wavelength of less than 200 nm, the upper limit of the light intensity of the ultraviolet rays L2 is set in advance so that the ultraviolet rays L2 are secondarily generated in the target space. The amount of ozone applied may be extremely small.
- the LED light source 3 includes a substrate 30 and multiple LED elements 31 mounted on the substrate 30 .
- a plurality of LED elements 31 are connected in series, and a plurality of rows are connected in parallel according to the maximum luminance desired for the LED light source 3 .
- the example shown in FIG. 5 schematically shows a case where six LED elements 31 are connected in series and the series circuits (LED element groups) are connected in parallel in four rows.
- the LED light source 3 includes an element that emits light in the blue region (for example, a wavelength of 450 nm) and a phosphor that receives this light and emits fluorescence in the yellow region. is not limited to this configuration.
- FIG. 5 is a circuit block diagram schematically showing the configuration of the lighting circuit included in the lighting device 1 of this embodiment.
- the lighting device 1 includes the AC/DC converter 6 , the UVC light source circuit section 12 , and the LED light source circuit section 13 .
- the AC/DC converter 6 is a circuit that converts a commercial AC voltage Vc supplied from a commercial power supply 9 (corresponding to an "external power supply") into a DC voltage V0.
- a circuit configuration example of the AC/DC converter 6 is shown in FIG.
- AC/DC converter 6 includes at least a rectifier circuit 51 and a transformer circuit 52 . Since both the rectifier circuit 51 and the transformer circuit 52 have a large number of elements, the AC/DC converter 6 is a circuit that tends to be relatively large.
- FIG. 6 schematically shows the rectifier circuit 51 as a block diagram, in the case of a general full-wave rectifier circuit, four diode elements are indispensable.
- the UVC light source 2 and the LED light source 3 share the AC/DC converter 6 . That is, the illumination device 1 includes a UVC light source 2 that emits ultraviolet light L2 and an LED light source 3 that emits visible light L3, but uses a single AC/DC converter 6, thereby reducing the size of the device. It is
- the UVC light source circuit unit 12 is a circuit that converts the DC voltage V0 generated by the AC/DC converter 6 into a lighting voltage V2 for the UVC light source 2.
- FIG. 7 shows a circuit configuration example of the UVC light source circuit section 12 .
- FIG. 7 shows a lighting circuit generally called a flyback system, which includes a switching element 41 , a control section 42 that controls opening and closing of the switching element 41 , a smoothing capacitor 43 , and a transformer 40 .
- a voltage V ⁇ b>2 induced on the secondary side of the transformer 40 is applied between a pair of electrodes ( 22 , 22 ) of the excimer lamp that constitutes the UVC light source 2 .
- the primary winding of the transformer 40 is connected to the DC voltage V0 via the switching element 41.
- this DC voltage V0 corresponds to the output voltage of the AC/DC converter 6.
- FIG. When the switching element 41 is turned on, a primary current flows from the DC voltage V0 to the primary winding of the transformer 40 .
- the switching element 41 is ON/OFF controlled based on the control signal G(t) from the control section 42 .
- the control signal G(t) changes from Low to High
- the switching element 41 transitions from the OFF state to the ON state, and the primary side current of the transformer 40 increases over time.
- the control signal G(t) changes from High to Low
- the switching element 41 transitions from the ON state to the OFF state.
- the LED light source 3 a group of LED elements each having six LED elements 31 connected in series are connected in parallel in four rows. Due to the characteristics of the LED element 31, current does not flow unless a voltage exceeding the threshold voltage is applied, and the current that flows is determined according to the applied voltage. In addition, the LED element 31 has a rated current that should flow in order to achieve maximum brightness, and a voltage (herein referred to as "forward voltage Vf") generated across the element when this rated current flows. is determined by the characteristics of the device.
- Vf forward voltage
- the DC voltage V0 output from the AC/DC converter 6 (hereinafter sometimes simply referred to as “the output voltage V0 of the AC/DC converter 6”) is determined by the number of serially connected LED elements 31 of 6 and the forward voltage Vf If it is sufficiently higher than the product of (6 ⁇ Vf), it is assumed that a current exceeding the rated current will flow through the LED element group, and each LED element 31 will be damaged.
- the illumination device 1 of the present embodiment includes a current adjusting element 13a as the LED light source circuit section 13.
- the current adjusting element 13a should have at least a resistance component.
- V0 is the output voltage of the AC/DC converter 6, If is the rated current flowing through the LED element 31, and Vf is the forward voltage when the rated current If flows through the LED element 31.
- the resistance component R 13 of the current adjusting element 13a is set to substantially match the value of R calculated by the following equation (1).
- the term (n ⁇ Vf) in the equation (1) corresponds to the voltage across the LED element group in which the plurality of LED elements 31 are connected in series when the rated current If flows.
- R (V0 - n Vf) / If (1)
- the LED light source circuit section 13 may include a light control control section (not shown) in addition to the current adjustment element 13a.
- the current adjustment element 13a is configured to be able to vary the resistance value based on a signal from the control section, and the control section controls the LED element 31 according to the desired luminance of the visible light L3 emitted from the LED light source 3.
- the resistance value of the current adjusting element 13a may be varied so that the current I3 flows to the LED element 31.
- FIG. 8 is a diagram schematically illustrating another configuration example of the lighting device 1 following FIG.
- the LED light source 3 an LED element group in which 12 LED elements 31 are connected in series is connected in parallel in four rows.
- the LED light source 3 is directly connected to the output terminal of the AC/DC converter 6, the threshold voltage necessary for light emission is not applied to each LED element 31, and the LED light source 3 may not emit light. can occur.
- the illumination device 1 of the present embodiment includes a current adjusting element 13a and a DC/DC converter 13b as the LED light source circuit section 13.
- FIG. The DC/DC converter 13b is a circuit that boosts the output voltage V0 of the AC/DC converter 6 to a DC voltage V4, and is realized by a circuit configuration as shown in FIG. 9, for example.
- the DC/DC converter 13b unlike the AC/DC converter 6 shown in FIG. 6, the DC/DC converter 13b does not require a rectifier circuit or a transformer, and thus can be realized with a small circuit scale.
- the DC/DC converter 13b converts the output voltage V0 of the AC/DC converter 6 into the forward voltage Vf when the rated current If flows through the LED element 31 and the forward voltage Vf of the LED element 31 connected in series. It is designed to step up to a DC voltage V4 represented by the product (n ⁇ Vf) of the number of elements n.
- the current adjusting element 13a for adjusting the current I3 flowing through the LED element 31 from the viewpoint of increasing the degree of freedom in design.
- FIG. 10 is a schematic perspective view of the illumination device 1 of a spotlight type.
- the lighting device 1 shown in FIG. 10 includes a lamp 62 having a cylindrical shape as a whole, an arm 63 having one end attached to the side surface of the lamp 62, and a holding portion fixed to the ceiling and having the other end of the arm 63 attached. 64 included.
- the lamp 62 constitutes a housing.
- the UVC light source 2, the LED light source 3, and the lighting circuits (the AC/DC converter 6, the UVC light source circuit section 12, and the LED light source circuit section 13) are accommodated.
- a front end face 62a of the lamp 62 is provided with a light extraction surface 5, from which ultraviolet rays L2 for deactivation and visible light L3 for illumination are emitted.
- both the front end face 62a and the rear end face on the opposite side have a diameter of 150 mm and a length of 232 mm.
- the lighting device 62 may be capable of rotating or tilting with respect to the horizontal direction or the vertical direction in order to change the emission direction of the ultraviolet rays L2 and the visible light L3.
- the UVC light source 2 is an excimer lamp (or a dielectric barrier discharge lamp in which a phosphor is arranged on the tube wall of the arc tube 21) has been described as an example.
- the present invention is also applicable when the UVC light source 2 is an LED (UV-LED) light source that emits ultraviolet light L2 having a peak wavelength in the wavelength range of 200 nm to 230 nm.
- UV-LED LED
- the UVC light source circuit unit 12 may include a human sensor. Specifically, when the human sensor detects the presence of a person in the target space, the control unit 42 may stop the control operation on the switching element 41 to turn off the UVC light source 2 . Further, the control unit 42 may start the above-described control operation for the switching element 41 to turn on the UVC light source 2 when confirming that no person exists in the target space for a predetermined time or longer.
- UVC light source 3 LED light source 4: housing 4a: upper region 4b: lower region 5: light extraction surfaces 5a and 5b: light extraction surface region 6: AC/DC converter 9: Commercial power supply 10 : Substrate 12 : UVC light source circuit unit 13 : LED light source circuit unit 13a : Current adjustment element 13b : DC/DC converter 21 : Luminous tube 22 : Electrode 25 : Filter member 30 : Substrate 31 : LED element 40 : Transformer 41 : Switching element 42 : Control unit 43 : Smoothing capacitor 51 : Rectifying circuit 52 : Transformer circuit 62 : Lamp 62a : Front end surface of lamp 63 : Arm 64 : Holding portion G20 : Luminous gas L2 : Ultraviolet light L3 : Visible light
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Abstract
Description
200nm~230nmの波長域にピーク波長を有する紫外線を出射するUVC光源と、
可視光を出射するLED光源と、
外部電源に接続され、前記外部電源に由来する交流電圧を直流電圧に変換して出力する単一のAC/DCコンバータと、
前記AC/DCコンバータから出力された直流電圧を前記UVC光源の点灯用電圧に変換して前記UVC光源に供給するUVC光源用回路部と、
前記AC/DCコンバータから出力された直流電圧を前記LED光源の点灯用電流に変換して前記LED光源に供給するLED光源用回路部とを備えたことを特徴とする。
前記LED素子群の両端間電圧は、前記AC/DCコンバータから出力された直流電圧より低く、
前記LED光源用回路部は抵抗成分を含むものとしても構わない。
前記LED素子群の両端間電圧は、前記AC/DCコンバータから出力された直流電圧より高く、
前記LED光源用回路部は、前記AC/DCコンバータから出力された直流電圧を昇圧するDC/DCコンバータを含むものとしても構わない。
R = (V0 - n・Vf) / If ……(1)
R = (V4 - n・Vf) / If ……(2)
以下、別実施形態につき説明する。
2 :UVC光源
3 :LED光源
4 :筐体
4a :上部領域
4b :下部領域
5 :光取り出し面
5a,5b :光取り出し面の領域
6 :AC/DCコンバータ
9 :商用電源
10 :基板
12 :UVC光源用回路部
13 :LED光源用回路部
13a :電流調整素子
13b :DC/DCコンバータ
21 :発光管
22 :電極
25 :フィルタ部材
30 :基板
31 :LED素子
40 :トランス
41 :スイッチング素子
42 :制御部
43 :平滑コンデンサ
51 :整流回路
52 :トランス回路
62 :灯具
62a :灯具の前端面
63 :アーム
64 :保持部
G20 :発光ガス
L2 :紫外線
L3 :可視光
Claims (7)
- 200nm~230nmの波長域にピーク波長を有する紫外線を出射するUVC光源と、
可視光を出射するLED光源と、
外部電源に接続され、前記外部電源に由来する交流電圧を直流電圧に変換して出力する単一のAC/DCコンバータと、
前記AC/DCコンバータから出力された直流電圧を前記UVC光源の点灯用電圧に変換して前記UVC光源に供給するUVC光源用回路部と、
前記AC/DCコンバータから出力された直流電圧を前記LED光源の点灯用電流に変換して前記LED光源に供給するLED光源用回路部とを備えたことを特徴とする、不活化機能付き照明装置。 - 前記LED光源は、複数のLED素子が直列に接続されてなるLED素子群を、一列又は相互に並列接続した複数列含み、
前記LED素子群の両端間電圧は、前記AC/DCコンバータから出力された直流電圧より低く、
前記LED光源用回路部は抵抗成分を含むことを特徴とする、請求項1に記載の不活化機能付き照明装置。 - 前記LED光源は、複数のLED素子が直列に接続されてなるLED素子群を、一列又は相互に並列接続された複数列含み、
前記LED素子群の両端間電圧は、前記AC/DCコンバータから出力された直流電圧より高く、
前記LED光源用回路部は、前記AC/DCコンバータから出力された直流電圧を昇圧するDC/DCコンバータを含むことを特徴とする、請求項1に記載の不活化機能付き照明装置。 - 前記LED光源用回路部は、前記DC/DCコンバータの出力側端子と前記LED光源との間の位置に配置された抵抗成分を含むことを特徴とする、請求項3に記載の不活化機能付き照明装置。
- 前記UVC光源と前記LED光源とを収容する筐体を含むことを特徴とする、請求項1~4のいずれか1項に記載の不活化機能付き照明装置。
- 前記筐体は、前記UVC光源から出射される前記紫外線と、前記LED光源から出射される前記可視光の双方を外部に取り出すための共通の光取り出し面を有し、スポットライト又はダウンライトの形状を呈することを特徴とする、請求項5に記載の不活化機能付き照明装置。
- 前記UVC光源は、前記紫外線のうち、波長240nmを超える波長域に属する成分の光強度を抑制するフィルタ部材を備えることを特徴とする、請求項1~4のいずれか1項に記載の不活化機能付き照明装置。
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CN202280020853.4A CN116982409A (zh) | 2021-03-12 | 2022-02-17 | 带有灭活功能的照明装置 |
KR1020237030919A KR20230145143A (ko) | 2021-03-12 | 2022-02-17 | 불활화 기능이 있는 조명 장치 |
EP22766766.4A EP4307838A1 (en) | 2021-03-12 | 2022-02-17 | Lighting device with inactivation function |
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Citations (6)
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JPS63187221U (ja) | 1987-05-26 | 1988-11-30 | ||
JPH04270608A (ja) * | 1991-02-27 | 1992-09-28 | Ran Technical Service Kk | 紫外線硬化型素材の硬化方法及びその装置 |
JP2015072739A (ja) * | 2013-10-01 | 2015-04-16 | パナソニックIpマネジメント株式会社 | 点灯装置、照明器具、及び照明システム |
JP2015174026A (ja) * | 2014-03-14 | 2015-10-05 | 日機装株式会社 | 光照射装置 |
JP2018190604A (ja) * | 2017-05-08 | 2018-11-29 | 岩崎電気株式会社 | Uvled照射システム |
JP6692407B2 (ja) | 2018-12-18 | 2020-05-13 | 三菱電機株式会社 | 照明器具 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS63187221A (ja) | 1987-01-29 | 1988-08-02 | Nec Corp | 光論理素子 |
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2022
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- 2022-02-17 CN CN202280020853.4A patent/CN116982409A/zh active Pending
- 2022-02-17 WO PCT/JP2022/006308 patent/WO2022190802A1/ja active Application Filing
- 2022-02-17 KR KR1020237030919A patent/KR20230145143A/ko unknown
- 2022-02-17 EP EP22766766.4A patent/EP4307838A1/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS63187221U (ja) | 1987-05-26 | 1988-11-30 | ||
JPH04270608A (ja) * | 1991-02-27 | 1992-09-28 | Ran Technical Service Kk | 紫外線硬化型素材の硬化方法及びその装置 |
JP2015072739A (ja) * | 2013-10-01 | 2015-04-16 | パナソニックIpマネジメント株式会社 | 点灯装置、照明器具、及び照明システム |
JP2015174026A (ja) * | 2014-03-14 | 2015-10-05 | 日機装株式会社 | 光照射装置 |
JP2018190604A (ja) * | 2017-05-08 | 2018-11-29 | 岩崎電気株式会社 | Uvled照射システム |
JP6692407B2 (ja) | 2018-12-18 | 2020-05-13 | 三菱電機株式会社 | 照明器具 |
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JP2022139667A (ja) | 2022-09-26 |
KR20230145143A (ko) | 2023-10-17 |
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