FIELD OF THE INVENTION

The invention relates to a louver that is configured to be detachably connected to a luminaire, wherein the louver comprises an ion generation source. The invention further relates to said luminaire. The invention further relates to a lighting arrangement comprising said louver and said luminaire. The invention further relates to a fin for a louver. The invention further relates to a corresponding method of detachably connecting a louver to a luminaire.

BACKGROUND OF THE INVENTION

The COVID-19 pandemic has been shaking the world from 2020 onwards. Said pandemic has already shown that it may cause economic recession, and that it may disrupt the mental wellbeing of people as a consequence of social distancing measures. However, irrespective of COVID-19, the health and wellbeing of people and/or animals has been contested periodically with other viruses and bacteria outbreaks already, such as for example the seasonal symptomatic influenza A/B outbreak, SARS, MERS, H1N1 and Bird Flu (Avian Influenza). Seasonal symptomatic influenza A/B has for example proven to be a returning economic burden. Future outbreaks, epidemics, and pandemics are not excluded.

Consequently, to prevent economic loss and to improve health and wellbeing of people and animals, a clear need exists for health and wellbeing in for example the domestic domain, the office domain, the public space and/or agriculture. Such a need may at least partly be met by various apparatuses and methods for air disinfection and/or air purification.

For example, air purifying devices are known to improve the health and wellbeing of people and/or animals. Such air purifying devices may include ion generators. These ‘ionizers’ generate ionized molecules in air (i.e. an ionization cloud, often negatively charged), which ionized molecules, in certain concentrations, may eliminate (airborne) bacteria, viruses, pollen, fungi, particulate matter, and other undesired contaminants in the air. The resulting improved air quality may e.g. be beneficial for the mental and physical wellbeing of people residing in a space. Therefore, as a solution, such air purifying devices may be implemented in lamps and/or luminaires. For example, a lamp or luminaire may advantageously be equipped with an ionizer. The ionizer may thereby benefit from the fact that lamps and luminaires are typically positioned at a location where people and/or animals are present, and where a connection to mains power exists, so as to power the ionizer. CN205592666U discloses a lamp with air purification function.

However, it is known that ionizers may attract much dust around their ion generation source, namely where the ionized molecules are generated in air. As a consequence, ionizers that are integrated in lighting devices, such as lamps and/or luminaires, may disadvantageously cope with dust accumulation around the ion generation source of their respective ionizer. Such dust may also affect the lighting device itself. This may increase the need for maintenance and/or serviceability. Since the lifetime of an ionizer may generally be shorter compared to the lifetime of a lighting device, the maintenance and/or serviceability of the ionizer may be more difficult for e.g. lamps and luminaires equipped with an integrated ionizer, for example due to limited accessibility of the ionizer in the lamp or luminaire.

SUMMARY OF THE INVENTION

It is an object of the invention to provide an improved system, which at least alleviates the problems and disadvantages mentioned above. Thereto, the invention provides a louver configured to be detachably connected to a luminaire, wherein the louver comprises: a luminaire connector for detachably connecting the louver to the luminaire; at least one fin for controlling a distribution of light of the luminaire; an ion generation source for generating ionized air molecules; a power connector for electrically connecting the louver to the luminaire; wherein the power connector relays power from the luminaire to the ion generation source, when the louver is electrically connected to the luminaire; and for example when the ion generation source is in operation.

In an embodiment, the ion generation source may comprise at least one ionization needle and/or at least one ionization brush. In an embodiment, the ion generation source may be integrated or embedded in a fin of the at least one fin. For example, the ion generation source may be an ionization needle integrated or embedded in a find of the at least one fin of the louver. The ion generation source may alternatively be an electrode, or charged plate. Hence, the louver comprises at least one fin. The louver is also configured to be detachably connected to the luminaire. The louver is therefore arranged to control a distribution of light of the luminaire, when connected to the luminaire. The ion generation source (i.e. e.g. one or more ionization needles or ionization brushes) of an ion generating device (i.e. e.g. ionizer) is typically the part that requires the earliest maintenance and/or serviceability. Throughout the application, said detachably may alternatively be phrased as releasably or replaceable.

Since the ion generation source is part of the louver according to the invention, which louver is detachably connected to the luminaire, the maintenance and serviceability of the ion generation source may be facilitated. Since only the ion generation source is in the louver, and because the power connector enables the ion generation source to be operational without requiring the power electronics (such as the driver) in the louver itself, the louver according to the invention is advantageous to enable said maintenance and serviceability.

For example, the louver may be replaced or renewed, thereby only having to replace or renew the ion generations source (e.g. ionization needle), without requiring accessing the power electronics of an ionizer itself, as it may be part the luminaire to which the detachable louver is connected.

Furthermore, since a possible dust accumulation caused by the ion generating source occurs at the louver, and in particular at the at least one fin of the louver, the dust may not be visible from the exterior, when the louver is connected to the luminaire. The dust may also be collected at the at least one fin. The dust may thus accumulate at a suitable location, because the at least one fin of the louver is already at least partly blocking the radiation of light of the luminaire, and is detachable from the luminaire. This clearly improves maintenance and/or serviceability.

Throughout the application, said at least one fin may be phrased as a plurality of fins. Throughout the application, said at least one fin may alternatively be phrased as one or more lamellae, or as one or more slats. Said at least one fin may control a distribution of light of the luminaire. Alternatively phrased, said at least one fin may control light of the luminaire, or control light emitted by the luminaire in operation, or control radiation of light of the luminaire The at least one fin may be tapered to one side, or have a tapered cross- sectional shape. The at least one fin may comprise a cavity or sleeve, which are open to the ambient. Such cavity or sleeve may be suitable for accumulating dust. The sleeve may e.g. be a circumferential protrusion or ridge, which defines an inner region or depression (e.g. crater). Throughout the application, said ionized air molecules may be phrased as ionized molecules in air. Moreover, the ionized air molecules may comprise positive and/or negative (charged) particles, or may comprise positive and negative (charged) ions. Negative ions thereof may be named anions. Such negative ions may render a germicidal effect. Providing both negative ions, as well as positive ions may even render an improved germicidal effect. Such ionization of air is known to be advantageous for disinfection.

The ion generation source may be plural throughout. That is, the ion generation source may be a plurality of ion generation sources. For example, the ion generation source may comprise a first, a second, a third, a further ion generation source.

In examples, the fin may comprise a fin material, wherein the fin material comprises a polymer, such as a plastic. Said polymer may be one of: ABS, PE, PVC, PP, PS, PTFE, HDPE, PC, PET. The fin material may alternatively be a ceramic, such as e.g. glass. The fin material may yet alternatively be a metal, such as e.g. brass, copper, steel, stainless steel or aluminum.

In an embodiment, a first fin of the at least one fin and a second fin of the at least one fin may intersect at an intersection part, wherein the ion generation source may be arranged at said intersection part. Such an embodiment may be advantageous, because said intersection part may structurally and/or mechanically be an improved location to accumulate possible dust, and/or to position the ion generation source.

In an embodiment, the ion generation source may comprise a first ion generation source, wherein the first ion generation source may be integrated in a first fin of the at least one fin. For example, in case the first ion generation source is a first ionization needle, the first ionization needle may be integrated in a first fin of the at least one fin. Throughout the application, said term ‘integrated’ may alternatively be phrased as ‘embedded’. Integrating the ion generation source in a fin of the at least one fin means that the ion generation source may be open to, or in communication with the ambient air, so as to generate the ionized air molecules. As partly mentioned above, integrating the first ion generation source in the first fin of the at least one fin may be advantageous for possible dust accumulation and keeping said dust accumulation out of view, and also for improved maintenance and serviceability.

In a further embodiment, the ion generation source may comprise a second ion generation source, wherein the second ion generation source may be integrated in a second fin of the at least one fin. Said ‘integrated’ may alternatively be phrased as ‘embedded’. Such an embodiment may be advantageous, because a second ion generation source may help generating ionized air molecules.

In yet a further embodiment, the first fin and the second fin are separated by at one or more further fins of the at least one fin. Hence, in aspects, the first fin and the second fin may not be neighboring fins of the at least one fin.

Such an embodiment may be advantageous for generating ionized air molecules at distributed locations at the louver. This improves the distribution, concentration and/or density of ionized air molecules (or: ionized molecules in air). Even further, since the first ion generation source and the second ion generation source may, in some operational modes, generate ionized air molecules with opposite charge (or polarity), such one or more further fins may prohibit recombination of ionized air molecules. Thereby, generated concentration, distribution and/or density of ionized air molecules may be improved.

In an embodiment, the first fin and the second fin are separated by a distance, wherein said distance is at least 10 centimeter, more preferably at least 30 centimeter, most preferably at least 50 centimeter. Such distances may improve the disinfection performance of the ionized air molecules, because less attraction and/or recombination of positive and negative ions will occur when the distance is at least said distance.

Hence, in an embodiment, the first ion generation source may generate negatively charged ionized air molecules, wherein the second ion generation source may generate positively charged ionized molecules.

In examples, the first ion generation source may generate the negatively charged ionized air molecules according to a first duty cycle, and the second ion generation source may generate the positively charged ionized air molecules according to a second duty cycle, wherein an on-state of the first duty cycle corresponds to an off state of the second duty cycle, wherein an off-state of the first duty cycle corresponds to an on-state of the second duty cycle.

Phrased differently, in aspects, the present invention may for example provide a louver configured to be detachably connected to a luminaire, wherein the louver comprises: a luminaire connector for detachably connecting the louver to the luminaire; a plurality of fins for controlling a distribution of light of the luminaire; one or more ion generation sources for generating ionized air molecules; a power connector for electrically connecting the louver to the luminaire; wherein the power connector relays power from the luminaire to the ion generation source, when the louver is electrically connected to the luminaire; and for example when the ion generation source is in operation. In an embodiment of this aspect, the one or more ion generation sources may comprise a first ion generation source, wherein the first ion generation source may be integrated in a first fin of the plurality of fins. In an embodiment of this aspect, the one or more ion generation sources may comprise a second ion generation source, wherein the second ion generation source may be integrated in a second fin of the plurality of fins. In an embodiment of this aspect, the first fin and the second fin are separated by at one or more further fins of the plurality of fins. In an embodiment of this aspect, the first fin and the second fin are separated by a distance, wherein said distance is at least 10 centimeter, more preferably at least 30 centimeter, most preferably at least 50 centimeter.

In examples, the louver may comprise a frame part. The at least one fin may be connected to the frame part. The frame part may comprise the ion generation source. Hence, the ion generation source does not have to be embedded in the fin, but may alternatively or additionally be embedded or at least part of said frame part.

Hence, in an embodiment, the louver may comprise a frame part, wherein the ion generation source may be integrated in the frame part of the louver. Said frame part may further comprise the luminaire connector and/or the power connector, and the at least one fin may be mounted to the frame part.

In aspects, the frame part may comprise a fin connector for connecting a fin of the at least one fin to the frame part. In aspects, the fin connector may be arranged to enable rotation of said fin of the at least on fin. In aspects, the fin connector may be configured to rotate said fin of the at least one fin based on a rotation schedule. Such rotation may enable the ion generating source integrated in such a fin to generate said ionized air molecules during rotation, hence movement. This may facilitate the distribution of ionized air molecules even further.

In an embodiment, the at least one fin may comprise a respective sleeve feature, wherein ion generation source is shielded by the respective sleeve feature. For example, such a sleeve feature may be protrusion (or ridge) shielding the ion generation source. Such protrusion is thereby advantageously protecting (the delicate components) of the ion generating source. The sleeve feature may e.g. be a circumferential protrusion or ridge, which defines an inner region or depression (e.g. crater).

In a similar embodiment, the at least one fin may comprise a respective cavity, wherein ion generation source is positioned within the cavity and circumferentially shielded by the cavity.

In an embodiment, the at least one fin may comprise a luminaire side and an ambient side, wherein the luminaire side is defined as the side of the at least one fin facing towards the luminaire when the louver is connected to the luminaire, wherein the ambient side is defined as the side of the at least one fin facing away from the luminaire when the louver is connected to the luminaire; wherein the ion generation source may be integrated at the luminaire side of a fin of the at least one fin and arranged for generating ionized air molecules at the luminaire side of said fin.

In an embodiment, the luminaire connector may comprise one of: at least one protrusion for detachably snap-fitting the louver to the luminaire; at least one slot for detachably snap-fitting the louver to the luminaire; at least one ridge for detachably sliding the louver into a matching groove of the luminaire; at least one groove for detachably sliding the louver into a matching ridge of the luminaire; a magnet; a Velcro patch; an adhesive patch; a vacuum joint; a bolt; a clip; a clamp; a hook & loop or hook & eye fastener; button; a screw.

For example, the luminaire connector may comprise a protrusion for detachably snap-fitting the louver to the luminaire. Such snap-fit connection may be an advantageous and straightforward means to easily connect and disconnect the louver from the luminaire.

In an embodiment, the power connector may be part of the luminaire connector. Alternatively, in an embodiment, the luminaire connector may be part of the power connector. More specifically, the luminaire connector may detachably connect the louver to the luminaire, but may thereby also electrically connect the louver to the luminaire, since the power connector may be part of the luminaire connector.

In an embodiment, phrased differently, the power connector may comprise the luminaire connector. Alternatively, in an embodiment, phrased differently, the luminaire connector may comprise the power connector.

The luminaire connector may for example be a protrusion for detachably snap fitting the louver to the luminaire, wherein the power connector is a metal circuit in said protrusion, so as to electrically connect the louvre (and the associated ion generation source) to the luminaire (and an associated power source).

Hence, in an embodiment, the luminaire connector may comprise at least one protrusion or slot for detachably snap-fitting the louver to the luminaire, and wherein said at least one protrusion or slot are part of the power connector.

Alternatively, the power connector may connect the louver electrically to the luminaire, but thereby also mechanically and detachably connect the louver to the luminaire, and thereby serve as a luminaire connector. Hence, the luminaire connector may be part of the power connector. The power connector may e.g. be a plug-and-socket type of connection.

In an embodiment, the at least one fin may be arranged for adsorbing, reflecting and/or diffusing light of the luminaire. Such an embodiment may be advantageous to enable the at least one fin of the louvre to partly illuminate as well, when the luminaire is operational, such that possible dust accumulation at the at least one fin may be even less visible to the exterior.

In examples, a fin of the at least one fin may be the ion generation source. For example, the ion generation source may be a charged plate, wherein a fin of the at least one fin may be said charged plate. Such fin may thereby serve a dual function of being a fin of a louver, but also able to generate ionized air molecules. In aspects, a surface area of a fin of the at least one fin may be the ion generation source.

It is further an object of the invention to provide a luminaire, which at least alleviates the problems and disadvantages mentioned above. Thereto, the invention provides a luminaire configured to be detachably connected to the louver according to the invention, wherein the luminaire comprises: a light source for providing a distribution of light; a driver for powering the ion generation source of the louver, when the louver is electrically connected to the luminaire; and for example when the ion generation source is in operation. Thereby, advantages and/or embodiments applying to the louver according to the invention may mutatis mutandis apply to said luminaire according to the invention.

The light source may be a solid state light source (SSL). The light source may e.g. be a LED light source. The light source provides a distribution of light, wherein the light may preferably be white light. Said white light may preferably have a color temperature in the range from 2000 to 8000 Kelvin, and a CRI of at least 80.

In aspects, the luminaire may further comprise a reflector for pre-collimating the light (or: distribution of light) emitted by the light source. The resulting collimated light may be provided to a space via the louver. Namely, the optical path of said collimated light may pass the louver, and associated at least one fin.

It is further an object of the invention to provide a lighting arrangement, which at least alleviates the problems and disadvantages mentioned above. Thereto, the invention provides a lighting arrangement comprising a luminaire according to the invention and the louver according to the invention. Thereby, advantages and/or embodiments applying to the louver according to the invention may mutatis mutandis apply to said lighting arrangement according to the invention. It is further an object of the invention to provide a fin, which at least alleviates the problems and disadvantages mentioned above. Thereto, the invention provides a fin for a louver of a luminaire, wherein the fin comprises an ion generation source integrated or embedded in the fin and a fin connector arranged for connecting the fin to a louver. The fin may have an optical function to control light emitted by a light source to which the louver is connected. The fin may be detachably connected to the louver via said fin connector. Moreover, in an embodiment, the fin may comprise a circuit for electrically connecting the ion generation source to a louver for powering the ion generation source. More specifically, said circuit may be electrically connected to an electrical circuit in the louvre, which relays and/or conveys power to the ion generation source. In an embodiment, the circuit may connect to the louver via the fin connector. In an embodiment, the fin connector may be a protrusion or a slot. The ion generation source may be an ionization needle, an ionization brush, or an ionization plate. At least part of a surface of the fin may serve, in examples, as the ionization plate. The fin may comprise a first ion generation source and a second ion generation source. The fin may comprise a plurality of ionization sources. The fin may comprise a tapered shape, wherein the ion generation source may be embedded or integrated in the fin at the broadest part of the tapered shape.

The fin may comprise an open cavity or slot, wherein the ion generation source is integrated or embedded in said open cavity or slot. The fin may alternatively comprise a sleeve or ridge, wherein the ion generation source is integrated or embedded within said sleeve or ridge. This may protect the ion generation source, but may also collect possible dust accumulation.

Thereby, advantages and/or embodiments applying to the louver according to the invention may mutatis mutandis apply to said fin according to the invention.

It is further an object of the invention to provide a method of detaching a louver from a luminaire, which at least alleviates the problems and disadvantages mentioned above. Thereto, the invention provides a method of detaching a louver from a luminaire, wherein the method is performed with the lighting arrangement according to the invention, wherein the method comprises the steps of: detaching the louver from the luminaire. The method may further comprise the optional (previously occurring) steps of: connecting the louver to the luminaire via the luminaire connector and the power connector; and operating the driver to power the ion generation source for generating ionized air molecules. The method may further comprise the optional (subsequently occurring) steps of: cleaning the louver from dust particles and/or replacing the ion generation source of the louver. Thereby, advantages and/or embodiments applying to the louver, luminaire or lighting arrangement according to the invention may mutatis mutandis apply to said method according to the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will now be further elucidated by means of the schematic non limiting drawings:

Fig. 1 depicts schematically an embodiment of a lighting arrangement comprising a luminaire and louver according to the invention;

Fig. 2 depicts schematically (a cross sectional sideview of) the louver of the lighting arrangement of figure 1 ;

Fig. 3 depicts schematically a cross sectional sideview of an embodiment of a lighting arrangement comprising a luminaire and louver according to the invention;

Fig. 4 depicts schematically a top view of the louver of the lighting arrangement of figure 3.

Fig. 5 depicts schematically a fin according to the invention.

Fig. 6 depicts schematically a method according to the invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

As mentioned, a lamp or a luminaire may be equipped with an ionizer, because the ionizer may benefit from the fact that lamps and luminaires are typically positioned at a location where people and/or animals are present, and where a connection to mains power exists, so as to power the ionizer. The ionizer is thereby considered as an ion generation device, including both the ion generation source as well as the a driver for powering the ion generation source.

However, it is known that ionizers may attract much dust around the ion generation source where the ionized molecules are generated in air. As a consequence, ionizers that are integrated in lamps and/or luminaires may disadvantageously cope with dust accumulation around their respective ionizer. This may limit the effectiveness of the integrated ionizer, and increase the need for maintenance and/or serviceability. Since the lifetime of an ionizer may generally be shorter than a lighting device, the maintenance and/or serviceability of the ionizer may namely be more difficult for lamps and luminaires equipped with an ionizer, for example due to limited accessibility of the ionizer in the lamp or luminaire. The present application provides a solution thereto. Figure 1 depicts schematically, by non-limiting example, an embodiment of a lighting arrangement 100 according to the invention. The lighting arrangement 100 comprises a luminaire 20 and a louver 10 according to the invention. The louver 10 is also schematically, by non-limiting example, depicted in figure 2 in more detail. The louver 10 is detachably connected to the luminaire 20.

Referring to figure 1 and figure 2, the louver 10 comprises a luminaire connector 1. The louver comprises a frame part 9. Here, the luminaire connector 1 is a magnetic pin, which detachably connects the louver 10 to the luminaire 20. The luminaire 20 may comprise a complementary slot matching the magnetic pin. The luminaire connector is thereby arranged at the frame part 9 of the louver 10, in particularly at both sides or end points of said frame part 9. Said luminaire connector may alternatively be any other type of connection means, for example the luminaire connector may comprise one of: at least one protrusion for detachably snap-fitting the louver to the luminaire; at least one slot for detachably snap-fitting the louver to the luminaire; at least one ridge for detachably sliding the louver into a matching groove of the luminaire; at least one groove for detachably sliding the louver into a matching ridge of the luminaire; a Velcro patch; an adhesive patch; a vacuum joint; a bolt; a clip; a clamp; a hook & loop or hook & eye fastener; button; a screw.

Still referring to figure 1 and figure 2, the louver 10 comprises at least one fin 2. Here, the at least one fin 2 is a plurality of fins, of which the number of fins may optionally vary. The at least one fin 2 is part of the louver 10, in particular connected or mounted to said frame part 9 of the louver 10. In examples, not depicted, said connection to the frame part may be via a fin connector. Such a fin connector may be a pin protrusion to mount the fin to (e.g. a matching hole of) the frame part. Moreover, the at least one fin 2 controls the distribution of light of the luminaire 20, when the luminaire 20 is in operation.

Optionally, the fins may comprise a tapered cross-sectional shape. The tapered shape, as also depicted in figure 2, may be wider at a side of the fin facing the luminaire 20 compared to the side of the fin facing a space illuminated by the luminaire 20.

Furthermore, the louver 10 comprises a power connector 4. The power connector 4 electrically connects the louvre 10 to the luminaire 20. Here, the power connector 4 of the louver 10 is a plug that matches a corresponding socket of the luminaire 20. Said socket (not depicted) may be powered by a driver of the luminaire 20. The power connector 4 is also arranged at the frame part 9. The power connector 4 may alternatively be part of the luminaire connector. Still referring to figure 1 and figure 2, the louver 10 comprises an ion generation source 3. The ion generation source may generate either negatively charged molecules in air, or positively charged molecules in air, or a mix of both. The ion generation source 3 is an ionization needle, but may alternatively be an ionization brush or charged plate (e.g. ionization plate), that is integrated or embedded in a fin of the at least one fin 2.

Yet alternatively, the ion generation source may comprise a plurality of ionization needles, or ionization brushes, which may either be embedded in fins of the at least one fin. For example, each fin of the at least one fin may comprise an ionization needle. Yet alternatively, the ion generation source may be part of said frame part of the louver, and not the fin of the at least one fin.

Alternatively, in an embodiment: The fin itself, or at least a surface part of the fin may be a charged plate. Said fin may thereby be the ion generating source. Such a fin may have a dual function of being a louvre, but also the ion generation source.

The ionization needle is electrically connected to the power connector 4 via a circuit 5. Said circuit 5 may also be part of the power connector 4. Therefore, the power connector 4 electrically connects the louver 10 to the luminaire 20 and relays power from the luminaire 20 to the ion generation source 3 (i.e. the ionization needle), when the louver 10 is electrically connected to the luminaire 20, and when the ion generation source 3 is in operation, in other words ‘is operated’.

More specifically, the at least one fin 2 comprises a luminaire side 6 and an ambient side 7. The luminaire side 6 is defined as the side of the at least one fin 2 facing towards the luminaire 20 when the louver 10 is connected to the luminaire 20. The ambient side 7 is defined as the side of the at least one fin 2 facing away from the luminaire 20 when the louver 10 is connected to the luminaire 20. The ion generation source 3, i.e. the ionization needle, is embedded in the mentioned fin, but at the luminaire side 6 of said fin. Therefore, the ion generation source 3 may generate ionized molecules in air at the luminaire side of said fin.

The luminaire 20 comprises a light source (not explicitly depicted) for providing a distribution of light. Here, the luminaire and associated light source are a pendant luminaire, with elongated shape. The luminaire may alternatively be any other luminaire, to which a louver may be detachably connected. The luminaire may optionally comprise a reflector to collimate the light emitted by the light source, before passing through the louver. The luminaire further comprises a driver for driving the light source in operation. However, the driver is also arranged for powering the ion generation source 3 of the louver 10, when the louver 10 is electrically connected to the luminaire 20, i.e. via the power connector 4 and associated circuit 5. The ion generation source 3 may then be in operation. The ion generation source 3 and the driver may in combination be referred to as an ionizer.

All in all, the louver 10 comprises at least one fin 2. The louver 10 is also configured to be detachably connected to the luminaire 20. The louver 10 is therefore arranged to control the radiation of light of the luminaire 20, when connected to the luminaire 20. The ion generation source 3 (i.e. ionization needle) is typically a part that requires the earliest maintenance and/or serviceability, compared to the luminaire 20. Since the ion generation source 3 is part of the louver 10 according to the invention, which louver 10 is detachably connected to the luminaire 20, the maintenance and serviceability of the ion generation source 3 may be facilitated. Since only the ion generation source 3 is in the louver 10, and because the power connector 4 enables the ion generation source 3 to be operational without requiring the power electronics (such as the driver) in the louver 10 itself, the louver 10 according to the invention is advantageous to enable said maintenance and serviceability.

Furthermore, dust accumulation caused by the ion generating source 3 occurs at the louver 10, and in particular at the luminaire side 6 of the at least one fin 2 of the louver 10, the dust may not be visible from the exterior, when the louver 10 is connected to the luminaire 20. The dust may also accumulate at a suitable location, because the at least one fin 2 of the louver 10 is already at least partly blocking the radiation of light of the luminaire 20.

Figure 3 depicts schematically, by non-limiting example, a cross sectional sideview of an embodiment of a lighting arrangement 200 according to the invention. The lighting arrangement 200 comprises a luminaire 40 and louver 30 according to the invention. Figure 4 depicts schematically, by non-limiting example, a top view of this louver 30 of the lighting arrangement of figure 3.

The luminaire 40 comprises a light source 41 for providing a distribution of light. The light source is a solid state light source, but may alternatively be any other LED light source. The louver 30 comprises a luminaire connector 31 for detachably connecting the louver 30 to the luminaire 40. The louver 30 also comprises a frame part 39. The luminaire connector 31 is a protrusion for detachably snap-fitting the louver 30 to the luminaire 40. The luminaire 40 comprises a complementary slot (not explicitly referred) for this detachable snap-fit connection. The luminaire connector 31 is thereby arranged at a frame part 39 of the louver 30, in particular at both sides or end-points of said frame part 39. Hence, the luminaire connector 31 comprises respectively a first protrusion and a second protrusion. The louver 30 further comprises at least one fin 32, i.e. here depicted with six fins, for controlling the distribution of the light of the light source 41. This may e.g. include the directionality and/or visibility of the light emitted by the light source.

The louver 30 further comprises an ion generation source 33 for generating ionized molecules 38 in air. Here, the ion generation source 33 are two ionization needles, but may alternatively be an ionization brush(es), or ionization plates. The ion generation source 33 is embedded in a respective fin of the at least one fin 32. More specifically, two fins of the six fins of the at least one fin 32 comprises respectively an ionization needle 33. The ionization needles 33 may be embedded in the respective fin 32 at a luminaire side 36 of said fin 32, the luminaire side 36 being defined as the side of the at least one fin 32 facing the luminaire 40.

Still referring to figure 3 and figure 4, the ion generation source 33 thus comprises a first ion generation source 33’ (i.e. first ionization needle) integrated in a first fin 32’ of the at least one fin 32 and a second ion generation source 33” (i.e. second ionization needle) integrated in a second fin 32” of the at least one fin 32. Here, the first fin 32’ and the second fin 32” are separated by two other fins of the at least one fin 32. Here, both the first ionization needle 33’ and the second ionization needle 33” generate negative ionized air molecules.

However, in alternative embodiments, the first ion generation source may generate positively charged ionized air molecules, and the second ion generation source may generate negatively charged ionized air molecules. Due to the fact that the first fin and the second fin are separated by the two fins in between, the positively and negatively charged molecules in air may not easily recombine, and improve the distribution of ionized air molecules.

Yet alternatively, the ion generation source, such as the first ion generation source and the second ion generation source, may be integrated in the frame part of the louver. For example, the first ion generation source may be integrated at a location in between, or equidistance between, two fins of a plurality of fins of the louver.

Still referring to figure 3 and figure 4, the louver 30 further comprises a power connector 34 for electrically connecting the louver to the luminaire 40. The power connector 34 is part of the luminaire connector 31. Namely, one protrusion of the luminaire connector 31 comprises said power connector 34. Thus, the power connector 34 may be part of the luminaire connector 31, or vice versa. Said luminaire connector may alternatively be any other type of connection means, for example the luminaire connector may comprise one of: at least one slot for detachably snap-fitting the louver to the luminaire; at least one ridge for detachably sliding the louver into a matching groove of the luminaire; at least one groove for detachably sliding the louver into a matching ridge of the luminaire; a Velcro patch; an adhesive patch; a vacuum joint; a bolt; a clip; a magnet, a clamp; a hook & loop or hook & eye fastener; button; a screw. The power connector may be part of such luminaire connectors.

The luminaire 40 also comprises a driver 42 arranged for powering the ion generation source 33 via the power connector 34. The driver 42 may also optionally power the light source 41. The ion generation source 33 of the louver 30 is thereby electrically connected to the luminaire 40, and in operation will render ionized molecules in air 38, such as negatively charged ionization cloud that may render a germicidal effect.

All in all, the ion generation source 33 (i.e. first ionization needle 33’ and second ionization needle 33”) is typically a part that requires the earliest maintenance and/or serviceability, compared to the luminaire 40. Since the ion generation source 33 is part of the louver 30 according to the invention, which louver 30 is detachably connected to the luminaire 40, the maintenance and serviceability of the ion generation source 33 may be facilitated. Since only the ion generation source 33 is in the louver 30, and because the power connector 34 enables the ion generation source 33 to be operational without requiring the power electronics (such as the driver) in the louver 30 itself, the louver 30 according to the invention is advantageous to enable said maintenance and serviceability.

Furthermore, dust accumulation caused by the ion generating source 33 occurs at the louver 30, and in particular at a luminaire side 36 of the at least one fin 32 of the louver 30, the dust may not be visible from the exterior, when the louver 30 is connected to the luminaire 40. The dust may also accumulate at a suitable location, because the at least one fin 32 of the louver 30 is already at least partly blocking the light of the luminaire 40.

Figure 5 depicts schematically, by non-limiting example, a fin 60 according to the invention. The fin 60 is suitable for a louver. The louver is thereby arranged to be mounted to a luminaire, so as to control the distribution of light of the luminaire. The fin 60 may be a fin for the louver according to the invention, as e.g. depicted in figures 1 to 4.

The fin 60 comprises a fin body 62. Here, the fin body 62 is a tapered shape. That is: when the fin is cut in a length direction, the cross section may render a tapered shape. Alternatively, the fin body may be any other shape. The tapered shape means that the fin body 62 has a top part 72 (or: surface) which is broader than a bottom part 74 (or: surface). The top part 72 may constitute the side at which the fin is facing a luminaire when the louver (to which the fin is connected) is connected to said luminaire. The bottom part 74 may constitute the side at which the fin is facing a space illuminated by the luminaire when the louver (to which the fin is connected) is connected to said luminaire.

The fin 60 may further be an elongated fin along a length axis, which may be perpendicular to the cross-sectional tapered shape. The fin 60 may be 3D printed. The fin 60 may comprise a fin material. Here, the fin material is a thermoplastic, but may alternatively be a ceramic, for example.

The fin 60 comprises a fin connector 68. The fin connector 68 is arranged to connect the fin 60 to a louver. This connection may be fixed or detachable. Here, the fin connector 68 is a slot, which may accommodate a matching protrusion. The matching protrusion is thereby located at the louver to which the fin may be connected. Alternatively, the fin connector may be a protrusion, which may fit into a matching slot at the louver.

Still referring to figure 5, the fin 60 comprises an ion generation source 66. When powered, the ion generation source 66 is configured to generate ionized air molecules. This may be either positive or negative ionized air molecules. The ion generation source 66 is embedded (or: integrated) in the fin 60. Here, the ion generation source 66 is an ionization brush, but may alternatively be an ionization needle or ionization plate. Yet alternatively, the fin may comprise a fin surface, wherein the fin surface is the ion generation source, e.g. an ionization plate. The ion generation source 60 is located at the top part 72 of the fin 60. That is: the ion generation source generates the ionized air molecules at the top part 72 of the fin 60.

The fin 60 further comprises a circuit (not depicted) for electrically connecting the ion generation source 66 to a louver for powering the ion generation source 66. The circuit may provide either a wired power connection or a wireless power connection (such as inductive power transfer). In the latter case, the circuit may e.g. be a coil. Here, the ion generation source 66 may be electrically connected to the louver via a wired connection, wherein the circuit connects to the louver via the fin connector 68. The circuit and the fin connector 68 may thereby relay and/or convey power to the ion generation source 66.

In alternative embodiments, the fin may comprise a plurality of ion generation sources, such as a plurality of ionization needles. Or: a first ionization plate at one side of the fin and a second ionization plate at a second side of the fin.

Still referring to figure 5, the fin 60 comprises an open cavity 64. This open cavity 64 is present at the top side 72, or phrased differently the top surface, of the fin 60. Therefore, the ion generation source 66 will also be open to the ambient at this top side 72. The cavity 64 will protect the ion generation source 66, as it is shielded. The cavity 64 may also be suitable for collecting dust, such that e.g. the dust may be out of view. The fin may alternatively comprise a sleeve or ridge, wherein the ion generation source is integrated or embedded within (or in a center of) said sleeve or ridge.

Figure 6 depicts schematically, by non-limiting example, a method 80 according to the invention. The method 80 is performed by the lighting arrangement according to the invention, e.g. the lighting arrangements depicted in figures 1-4.

The method 80 comprises an initial optional step 81 of connecting the louver to the luminaire via the luminaire connector and the power connector; and a step 82 of operating the driver to power the ion generation source for generating ionized air molecules. The connection is, as mentioned before, a detachable connection. The method 80 further comprises the main step 83 of detaching the louver from the luminaire. The method 80 further comprises the optional step 84 of cleaning the louver from dust particles, and/or replacing the ion generation source of the louver.