• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a lighting system for illuminating outdoor areas such as a sports field. The lighting system comprises a plurality of lights (10) comprising a plurality of lighting elements (20) arranged in a non-coplanar manner on a frame or in at least one housing (11) for generating a plurality of light beams with an optical axis substantially in the direction of the outside areas and at least one shielding element. The shielding element is arranged in an upper region (22) of the plurality of lighting elements (20) in order to shield at least a part of the plurality of light beams in the direction of the horizon and above it away from the earth.
    公开号:CH717004A1
    申请号:CH01603/20
    申请日:2020-12-16
    公开日:2021-06-30
    发明作者:Piers C/O Swiss Precision Lighting Ag Harald
    申请人:Swiss Prec Lighting Ag；
    IPC主号:
    专利说明:

    Cross reference to related applications
    [0001] None
    Field of invention
    The invention relates to a lighting system for lighting outdoor areas, such as streets, paths, sports facilities and other outdoor areas, with one or more lighting elements or light sources.
    Background of the invention
    The present document relates to a lighting system with one or more floodlights for lighting outdoor areas, such as those used for lighting paths, streets, outdoor areas, sports fields, ski slopes, halls, etc. Such lighting systems are usually installed at a certain height above the surface of the outdoor area to be illuminated. The lighting system is usually installed on one or more masts, on a wall or rope, on a ceiling, roof or other component or on a natural body such as a rock.
    State of the art
    The lights used in the lighting systems, such as floodlights or street lamps, must have lighting elements that are sufficiently strong in order to be able to illuminate the outside area appropriately. The light from the lamp is emitted by one or more lighting elements arranged in the lamp, which are mounted on a luminous surface. The light generated by the lighting system is distributed with these lighting elements in such a way that the lighting task, i.e. the light distribution on the surface of the outside space, is sufficiently achieved.
    One of the problems associated with outdoor lighting fixtures is the generation of diffuse light, i.e. that light that is emitted by the lighting fixture but is not directed to illuminate the outdoor area. There are various effects in the lighting system and in the luminaires themselves that can create an unavoidable portion of the scattered light. In the lighting systems according to the prior art, the direction of illumination of the scattered light is generally not controlled by optical elements, so that the scattered light leaves the lighting system in an essentially uncontrollable manner. These various effects include imperfections in the optical elements of the luminaires, tolerances in the assembly of the lighting system, the lighting elements themselves, which are not real point light sources, soiling or due to different thermal expansion. Eventually, other surfaces inside and outside the luminaires are irradiated by the light and reflect or scatter the light in random directions.
    The effect of this reflected and scattered scattered light leads to the fact that the light of the lighting system is often emitted in directions that cannot be controlled and cannot be used to fulfill the lighting task. The lighting system is also perceived as a bright point of light in these scattered light directions, since the relatively small light exit surface of the lamp leads to a very high luminance at this point in comparison to the dark surroundings and also in comparison to the illuminated surface of the outside area.
    Currently, light emitting diodes (LEDs) are the preferred lighting elements in the lights.
    The lighting systems constructed according to the prior art have one or more light exit surfaces that are essentially planar or flat in nature. These light exit surfaces usually take up almost the entire surface of the luminaire, especially in the case of high-performance lighting systems that are used to illuminate large areas. The minimum area of a luminaire according to the prior art results from the number of individual LEDs that are required for a sufficient total luminous flux and the size of the optics connected to the LEDs. The size of these optics depends on the required concentration of the light rays emerging from the LEDs and the size of the light exit surfaces of the LEDs.
    An example of a lighting system with LEDs is known from US patent publication No. US 9,581,303 B2 (Gordin et al.), Which discloses a lighting system with a plurality of LED lighting elements and in which a long service life can be adequately ensured, by teaching the requirements of the application, the characteristics of the LEDs, the characteristics of the luminaire comprising those LEDs, the desired number of hours of operation and an iterative approach to powering the LEDs. LED lighting elements are individually provided with a shape, designed so that part of the light from the light exit surface of a lens is blocked at preferred angles. The LED lighting elements have black, light-absorbing lenses that are designed to illuminate a target area but to absorb light that could cause glare.
    Planar surfaces of the lights are in an installation position, for example on a support element such as a mast, frame or pole, aligned so that in combination with the other lighting elements of the lighting system that surround the outdoor area to be illuminated, an acceptable, ie The light distribution in accordance with the standards is achieved on the surface of the outdoor area. This alignment of the light-emitting surfaces means that such lighting systems are often visible from a very great distance, since the lighting systems are arranged on the carrier element at a distance above the surface of the illuminated external area. The scattered light is distributed in many directions and does not contribute to the lighting task. Even if the lighting system could in principle be arranged in such a way that no scattered light is seen from a distance, an angular component of the light rays of the lighting system remains below the horizon, within which the emitted light does not contribute to the lighting task of the outside area.
    Another example of a lighting system with LEDs and shielding elements to avoid stray light is the ALO lighting system from AEC. Details of this lighting system can be found on the website http://alo.aecilluminazione.com (downloaded on March 16, 2020). It shows the LED lighting elements, which are mounted on a flat, level surface with a large light-emitting surface. The optical axes of these LED lighting elements are perpendicular to the flat, even surface.
    As already mentioned, the lighting systems according to the prior art are visible from a great distance as bright points of light. These points of light are undesirable for several reasons. Sports facilities are often located in or near residential areas, and there are increasing cases of residents complaining of light nuisance from lighting systems installed near residents' windows. The lighting systems should cause unpleasant effects and glare through the windows through the cold white light of the LEDs in the luminaires in combination with the very bright light-emitting surfaces of the lighting system.
    A vehicle driver on a traffic route will observe these points of light, which appear much brighter than the roadway itself, and may be distracted as a result. Light pollution, itself caused by the light emitted almost horizontally, is an unpleasant side effect of the lighting of squares and streets.
    The lighting systems are also attractive to nocturnal animals and insects, which then move towards the lighting systems. The insects can ultimately die exhausted because they are in an "orbit" around the points of light due to the distance from the lighting system and the lingering.
    Typical lights in the lighting systems for lighting, for example, sports facilities according to the prior art have a weight of 20-30 kilograms and emit between 120,000-200,000 lumens. The radiation angle required for this is about 20 degrees or less. A clear demarcation between the illuminated and non-illuminated area is also a challenge with the known state of the art and is mostly due to the fact that parts of the light exit surface still remain visible and these always emit light into the entire half-space even under optimal conditions.
    In addition, the high luminous flux requires a large number of lighting elements with associated optics. In order to generate the required radiation characteristics, these optics must have a size of approx. 8-10 times the edge length of the emitting LED chip area. A maximum of 300-400 lumens can be generated per square centimeter. However, this value is dramatically reduced if the radiation is to be asymmetrical, as is required with the luminaires used today. Alternatively, the lights could be erected, but this would inevitably lead to radiation towards the horizon and beyond.
    Another challenge with asymmetrical radiation is that the optics required require a much larger area, since the light from an LED should be deflected as well as possible to only one side. A too close arrangement of the LEDs or optics leads to mutual shading and thus to a loss of efficiency and more scattering. Because of this fact, known lights typically have dimensions of at least 60 cm by 60 cm, which also results in the aforementioned weight. There are also significantly larger versions to be found.
    It is the object of the present disclosure to provide a lighting system with a low weight and a high luminous flux with little scattered radiation.
    Summary of the invention
    The lighting system of this document is designed for the lighting of outdoor areas, such as sports fields, and comprises a plurality of lights with a plurality of lighting elements or light sources on a frame in a non-coplanar arrangement to generate a plurality of light beams are arranged with an optical axis essentially in the direction of the outer regions. At least one shielding element is arranged in an upper region of the plurality of lighting elements in order to shield at least the majority of the plurality of light beams in the direction of the horizon and above (away from the earth).
    The non-coplanar arrangement of the lighting elements on the frame means that the optical axes of the lighting elements do not run parallel to one another and the optical axes of the lighting elements will cross at some point in space.
    In one aspect, the lighting elements are light emitting diodes.
    In a further aspect, the lighting system further comprises bundling optics / s for bundling light beams in a targeted direction.
    In a further aspect, the lighting elements comprise a plurality of light emitting diodes which are arranged in at least one of an offset pattern or a hexagonal pattern. This enables a uniform light distribution to be generated.
    In a further aspect, the light rays emerge at an angle of less than 25 ° from the focusing optics (s). As a result, most of the light from the lighting elements is directed along the optical axis.
    In another aspect, a plurality of the plurality of lighting elements are arranged in a convex manner. This allows stray light to be better shielded.
    In a further aspect, optical axes of the plurality of lighting elements intersect in a geometric spatial area in front of the lighting elements.
    In a further aspect, a plurality of the plurality of lighting elements are arranged in a frame or in the housing. The alignment of the optical axis can be influenced by the arrangement in a frame or housing.
    In a further aspect, the frame and / or the housing is attached to at least one mast.
    In a further aspect, the at least one shielding element is arranged in a lateral area. The light rays of the lighting element (s) can thereby be shielded on each side of a light exit surface.
    In a further aspect, a length of the plurality of shielding elements is less than 40 cm, preferably less than 20 cm. As a result, the size or the dimension of the lamp can be further reduced.
    In a further aspect, the plurality of lighting elements have a light exit width of less than 10 cm, preferably less than 5 cm. As a result, the size or the dimensions of the lamp can be reduced even further.
    In a further aspect, each individual one of the plurality of lighting elements can be rotated by an angle β and tilted by an angle Ω. As a result, each of the individual lighting elements can be rotated and tilted by setting the angles Ω and angles β in order to achieve uniform illumination of the outside area.
    Description of the figures
    Fig. 1 shows a lighting system that illuminates an outdoor sports field
    Fig. 2 shows the distribution of light from lamps.
    3 shows a lamp with a large number of lighting elements.
    4 shows a lighting element with a plurality of light-emitting diodes.
    Figure 5 illustrates the shielding of light from luminaires.
    6 shows the principle of a shielding element.
    Fig. 7 shows the screening elements on a sports field.
    8 shows a further schematic construction example of the lamp.
    FIG. 9 is a perspective view of the lamp of FIG. 8.
    Description of the invention
    The invention will now be described on the basis of the drawings. It is assumed that the embodiments and aspects of the invention described herein are only examples and in no way limit the scope of the claims. The invention is defined by the claims and their equivalents. It is assumed that features of one aspect or an embodiment of the invention can be combined with a feature of another aspect or other aspects and / or embodiments of the invention.
    For a better understanding of the invention, it is helpful to take a closer look at the arrangement of lighting systems 100 for illuminating an outside area 5. Such an exemplary arrangement is shown in Fig. 1 for the lighting of a sports field. The lighting system 100 comprises a plurality of lights 10 (also referred to as floodlights in connection with a sports field or an airport apron), arranged on support elements, such as masts 12, at a height h between 12 m (meters) and 20 m above the Surface of the outer area 5. It is pointed out that these dimensions do not represent a limitation of the invention. The luminaires 10 comprise a multiplicity of lighting elements 20 or light sources 20, comprising a multiplicity of light-emitting diodes (LEDs), as shown in FIG. 3. The height h of the masts 12, which are used in other applications such as airports or stadiums, is also significantly higher, e.g. up to about 40 m. The minimum area that is to be illuminated in a direction perpendicular to the mast 12 typically has a radiation distance 1, as shown in FIGS Soccer field, to a radiation distance 1 of about 60-70m. At airports or stadiums with the taller masts 12, the radiation distance 1 is correspondingly greater. It is estimated that in practice the area of the external area 5 which is illuminated by different ones of the luminaires 10 overlap. Fig. 7 shows another arrangement in which the lamp 10 is mounted on a mast 12 and illuminates the entire sports field.
    The distances between the lights 10 mounted at the top of the mast 12 and a maximum radiation distance 1max (see Fig. 7) of the illuminated area of the outside area 5 can be large, for example over 50 m. The lights 10 are therefore with bundling optics / en 28 (see FIG. 4) in the plurality of lighting elements 20 in order to bundle light rays 25 (see FIG. 2) of the plurality of lighting elements 20 in a specific direction and to achieve a sufficient illuminance of the surface of the outer area 5. It is known that the degree of illuminance of the lighting elements 20 decreases with the square of the distance between the lighting elements 20 in the luminaire 10 due to the inverse square law. Therefore, the shaping or the concentration of the light rays 25 of the lighting elements 20 has to take place mainly in the direction of the maximum emission distance 1max on the surface of the outer region 5. This direction is only a few degrees wide, as can be understood from simple geometric considerations and will be explained in more detail later.
    The ratio between the size of the light exit surface of the lamp 10 and the size of the focusing optics / s 28, which is used to shape and concentrate the light direction, determines the achievable degree of concentration of the light rays 25 of the lighting elements 20. The laws of optics say that the size of the focusing optics 28 is greater, the tighter the degree of concentration of the light rays 25 that are required by the focusing optics 28.
    On the other hand, due to static considerations of the masts 12, the lights 10 must not be very large or heavy, since the masts 12 may not be able to carry the additional weight or the wind load. The size of the focusing optics 28 in the luminaire 10, which is required to shape the light sufficiently, therefore limits the number of lighting elements 20, which in turn limits the luminous flux that can be achieved by the light from the luminaires 10. On the other hand, due to the same considerations, it is not possible to attach any number of lights to a mast 12, so that the prior art imposes narrow limits on the luminous flux that can be achieved on a mast with a certain load capacity.
    A non-limiting first example of the construction of the lights 10 will now be described with reference to Fig. 3, which shows a light 10 such as would be used, for example, for the floodlighting of a sports field. It can be seen that the luminaire 10 in FIG. 3 comprises a frame 50 consisting of two ring-shaped elements 510a and 510b arranged in parallel. The two annular elements 510a and 510b are connected to one another by spacer plates 520a and 520b. Two curved supports 530a and 530b are arranged between the two spacer plates 520a and 520b. The curved supports 530a and 530b have a plurality of holders 540 in which a plurality of the lighting elements 20 are convexly mounted. The convex mounting method helps to shield against stray light. It is estimated that other non-planar surface structures can be used as long as they direct the light from the plurality of lighting elements 20 into the outer region 5. This leads to the fact that the optical axes 23 of the lighting elements 20 intersect in a geometric spatial region in front of the lighting elements. For the sake of clarity, it should be pointed out that this spatial area of the intersection of at least two optical axes 23 does not necessarily lie on the surface of the outer area 5, but could lie in a space “below the surface of the earth” or in the air above the area of the outer area 5. The holders 540 can be rotated around the curved supports 530a and 530b so that the lighting elements 20, arranged in one of the plurality of holders 540, can direct the light in different directions.
    As already mentioned, the construction of the lights 10 shown in Fig. 3 is only an example. The frame of the annular elements 510a and 510b and the spacer plates 520a and 520b is not a limitation of the invention and could take different shapes, such as an oval shape or a rectangular shape. The number of supports 530a and 530b in the luminaire 10 can also be changed if necessary, and the number of holders 540 does not constitute a limitation of the invention either.
    It would also be appreciated if two or more of the frames 50 could be mounted together on one of the masts 12 and this would be suitable for lights 10 that are placed in floodlights to illuminate a larger area than a sports field. It would also be appreciated that much smaller lights 10 could be used for street lighting. These small lights 10 could, for example, comprise only one or two of the lighting elements 20.
    4 shows an example of one of the lighting elements 20. It can be seen that the lighting elements 20 comprise a plurality of light-emitting diodes which are arranged offset in order to form a hexagonal or hexagonal arrangement in a light exit surface 27, but this arrangement is not a limitation of the invention, and shapes other than a round shape or a rectangular shape could be selected for the plurality of lighting elements 20. The hexagonal arrangement was chosen because this arrangement generates an essentially uniform light beam from the light exit surface 27 of the lighting element 20 as well as the highest density of light-emitting diodes and thus reduces the overall size of the light exit surface 27. The color properties of the lighting elements 20 can be identical or different from one another. In one non-limiting aspect, the lighting elements 20 have a maximum light exit surface 27 in a direction approximately perpendicular to an emission direction of 50 mm (millimeters). In other aspects, the lighting elements have a smaller maximum light exit area 27 in the sense mentioned, for example of a maximum of 36 mm or even of a maximum of 25 mm. The lighting elements 20 are covered by the focusing optics 28 and emit light in light beams 25 in the direction of an optical axis which is essentially perpendicular to the plane of the light exit surface 27. This optical axis 23 generally corresponds to the direction in which the light from the lighting elements 20 has to be bundled and shaped in order to generate the lighting characteristic required for the desired external area 5. The light rays 25 of the lighting elements 20 shown in FIG. 4 emerge at an angle of less than 25 ° (degrees) from the focusing optics 28 in one aspect and emerge from the focusing optics at an angle of less than 10 ° / en 28 in another aspect.
    This reduction in size of the lighting elements 20 initially seems to contradict the intuition of the person skilled in the art. The light from the lighting elements 20 should be concentrated in the form of rays precisely in the direction perpendicular to the light exit surface 27. At the same time, the bundling optics 28 must not be particularly large in this direction, which actually prevents the concentration. However, as will be shown below, this is a prerequisite for the light to be shielded and thus the scattered light and the visibility of the light exit surfaces 27 from outside the surface of the outer region 5 to be illuminated can be reduced.
    6 illustrates this dilemma with the aid of the lamps 10 known in the prior art with the aid of two representations (above and below). In the upper FIG. 6, two lights 10a and 10b are shown, which are equipped with shielding elements 30a and 30b. In this example, the light-emitting surfaces of both luminaires are arranged horizontally, as is typical for street lighting. The lamp 10a on the left side has a larger light exit surface than the lamp 10b on the right side. The shielding elements 30a and 30b in the upper FIG. 6 have the same size, but it can be seen that the effective radiation angle of the light from the left lamp 10a is greater than the effective radiation angle of the light from the right lamp 10b. As a result, a larger area is illuminated or more scattered light is generated in undesired directions. The very bright light exit surface of the lamp 10a is thus visible from more directions and from a greater distance than the light exit surface of the lamp 10b.
    This can be compared with the lower FIG. 6, in which the illumination area of the left lamp 10c and the right lamp 10d is the same size. However, the size of the shielding element 30c of the left lamp 10c is significantly larger than the size of the shielding element 30d of the right lamp 10d. As already mentioned, the enlargement of the shielding elements 30c (compared to 30a) means an increase in weight and wind resistance which the masts 12 may not be able to endure.
    In the lighting system 100 of this document, the lighting elements 20 of the luminaire are provided with an individual shielding element 21, as is shown with reference to FIG. To illuminate sports facilities, the lighting elements are expediently installed in such a way that the maximum of their radiation is essentially directed at the most distant area to be illuminated, as described below by way of example. The lighting elements 20 include the light exit surface 27 with a vertical dimension or a light exit width w (ie dimension essentially perpendicular to the plane of the surface of the outer region 5) and the optical axis 23, running perpendicular to the plane of the light exit surface 27. The shielding element 21 has a length d and is attached at a distance b from the edge of the light exit surface 27 and is arranged in the upper region 22 of the lighting element 20. In a further aspect, further shielding elements 21 can also be arranged in a different area than the upper area 22, for example laterally on the lighting element (s) 20. The lighting element (s) 20 accordingly comprise the upper area 22 and one or more lateral areas 26, as shown in FIG. 9. It is understood that the shielding member 21 shields the light between the angles αB and αE, the angles between the end of the shielding member 21 and the optical axis 23, as indicated in FIG. 6. In a non-limiting example, the at least one shielding element 21 could be configured as a curved or straight element, with or without reflective members, which completely or at least largely covers the light source (s). This means that the light exit surface 27 of the lighting element is shielded from a viewing angle αE and this shielding is completed from the angle αB, i.e. the light exit surface can no longer be seen for angles> αB and thus the lighting element 20 appears dark. This angle thus corresponds to an imaginary direction of observation of an observer in relation to the optical axis 23.
    It is known from mathematics that tan αE = <b> / d. Similarly, tan αB = <(b> <+> <w)> / d. The light of the lighting element 20 will therefore not begin to scatter until the value of the angle αB is chosen to shield areas outside the area of the outer area 5 to be illuminated. The angle αB has the larger value and is the angle which, if not correctly set, causes the greatest amount of scattered light.
    How this works on a sports field as an outdoor area 5 is shown in FIG. 7, which shows the lamp 10 mounted on the mast 12. In the detail of FIG. 7 it can be seen that the optical axis 23 of the lamp 10 is inclined obliquely downwards by the tilt angle Θ in order to direct the light onto the outer area 5 to be illuminated. The optical axis 23 of the light exit surface 27 of a lighting element 20 within a luminaire 10 is therefore arranged in such a way that it points at most towards or just next to the sports field. The mast 12 is mounted on one side of the sports field and the lights 10 should illuminate transversely or diagonally to the other side of the sports field, i.e. at most a little beyond the end of the sports field. As shown in FIG. 7, this can be achieved. The length d of the shielding element 21 (see Fig. 5) should, however, be chosen so that the outermost illumination angle Θ-αB only illuminates a small area outside the sports field, namely in a direction that runs parallel to the earth's surface to the horizon 8, which is indicated by the directional arrow. In order to ensure full illumination of the sports field by the light 10, the illumination angle Θ-αE must essentially coincide with a first edge 6 of the sports field. In combination with a reflective shielding element and the appropriately narrow beam angle of the lighting element 20, it is ensured that almost all of the emitted light strikes the playing field, which essentially represents the outside area 5 to be illuminated.
    In practice, the lamp 10 has a large number of lighting elements 20 which are mounted at different tilt angles Θ in order to ensure a largely uniform illumination of the sports field.
    The shielding elements 21 can be provided with a light-absorbing layer which, for example, consists of a matt black lacquer layer or anodized aluminum on the shielding element. The shielding elements 21 will more often be mirrors which reflect the light onto the sports field. In one aspect, the shielding element 21 can shield at least one of the plurality of lighting elements 20. In a further aspect, the shielding element 21 can shield a multiplicity of lighting elements 20.
    An example of the dimensions will now be given. Assume that the distance between the mast 12 and a second edge 7 of the sports field is k and the width of the sports field is s (see FIG. 7). The height of the mast is h (as above). The greatest possible value of αBsei is given when this is equal to the value of the tilt angle Θ at which the light begins to radiate parallel to the earth's surface in the direction of the horizon 8. It is known that and
    This means that or
    Let us assume that the light exit width w of the light exit surface 27 is approximately 10 cm, the length d of the shielding element 2140 cm (centimeters) (0.4 m) and the height h of the mast 12 is 18 m. If the width s of a soccer field is 64 m and the distance k of the mast 12 to the second edge 7 of the field is 3.5 m, then (k + s) is 67.5 m. If the distance b is also zero, then means this means that the associated tilt angle Θ would have to be a limit value of at least about 15 ° in this case. It must be noted that this is a minimum requirement, namely that the light exit surfaces must not be visible from positions above their mounting level. Even this minimum requirement is currently not met by most of the state-of-the-art lighting systems for sports facilities. In addition, shielding elements with a size of 40 cm cannot be implemented in practice, since they represent a considerable additional wind load due to their flat structure, and a large number of such shielding elements may be required per luminaire 10.
    In practice, an even smaller light exit width w of around 5 cm (0.05 m) is desired. Because this basic calculation would only limit the emission of the scattered light and thus the visibility of the high luminance lighting elements up to horizon 8. In practice, however, it should also be avoided that the light in the vicinity of building facades, trees or simply not hits the outside area 5 to be illuminated outside the target outside area. Therefore, the value of the angle αB should be smaller than and not equal to the value of the tilt angle Θ, as shown in the example above.
    It is possible to assume the maximum value of the angle αB if it is assumed that at a distance of 80 m from the mast 12 it is undesirable to have an emission of light of more than 2 m in a direction perpendicular to the earth's surface. This would roughly correspond to a typical living situation with buildings not too far from the sports field. In this case the equation would be:(18m-2m) / 80m = 0.2 = tan (Θ - αB)
    The value of the tilt angle Θ cannot be chosen arbitrarily. It corresponds to the angle of the vertex of the light emission of a lighting element of a lamp 10. As already mentioned, most of the light is required at least in the middle of the sports field, where the value of the angle Θ is calculated from tan Θ = 18m / (64m / 2 + 3.5m) ≈ 0.5 in the best case. It should be noted that the masts 12 are often only 16 m or 14 m high, and a certain overlap of the light distributions in the middle is very desirable. With these more practical numbers, you get the following equations:0.2 = tan (Θ - αB); Θ - αB = 11.3 °;αB = Θ - 11.3 ° = 26.6 ° - 11.3 ° = 15.3 °,Therefore, there
    In fact, in the best case this is the practical limit for the complete limitation of the lighting elements for the lighting of a soccer field, but also applies with adapted values for mast height and area orientation and size for other lighting applications in the outdoor area. With a length of the shielding element d = 20 cm, there is a smaller light exit width w of around 5 cm (0.05 m) compared to the case described above, whereby the radiation of the light coming from the light exit surface w is only limited to the horizon 8. The flat angle of incidence of the light on the horizontal surface creates an area over which the light is dimmed from full intensity to zero. In FIG. 7, this area corresponds to the distance between the points of intersection of the rays assigned to the tilt angles Θ - αB and Θ - αE with the level of the sports field. This distance becomes very long for smaller tilt angles Θ, which correspond to lower mast heights h, and shorter panels. In order to achieve the same shielding effect, the ratio of the length of the shielding element d and the light exit width w plus the distance b from the shielding element must always be the same. This means that the value b should be as small as possible, ideally even 0, and the light exit width w also as small as possible, which in turn contradicts the requirement of close bundling. This dilemma can be solved by using correspondingly high-performance light sources according to FIG. 4.
    A further construction example of the luminaire 10 is shown in FIGS. 8 and 9 without shielding element (s) 21. The luminaire 10 comprises one or more housings 11, each of which comprises a multiplicity of lighting elements 20 and optionally one or more optional fans 60. A housing 11 can be produced, for example, from a sheet metal construction, by casting processes, or also by additive manufacturing. Such a housing 11 comprises cooling channels 65 between a cover 18 and base 16 of the housing 11 and cooling elements 67. The cooling elements 67 are attached to the rear of the lighting elements 20 and have, for example, the shape of ribs, lamellas, honeycombs and other shapes and are used to to provide a larger surface in order to dissipate the heat generated by the lighting means 20 to the surroundings. In order to further increase the dissipation of heat, ambient air is guided through the cooling channels 65 to the cooling elements 67 and / or the lighting elements 20. The optional fan (s) 60 can be an axial fan or radial fan. In one aspect, the one or more fans 60 is a radial fan. The fan 60 can be driven in a known manner, such as by an electric motor (not shown).
    The cooling channels 65 and cooling elements 67 can be produced together with the housing or separately from the housing 11 by additive manufacturing. This means that the construction of the housing 11, the cooling channels 65 and cooling elements 67 can be adapted individually. Above all, the shape and number of cooling channels 65 can thus be individually adapted. If desired, the shape of the housing 11 can also include further elements serving to dissipate the heat.
    The lighting elements 20 are placed in the housing 11 and mounted. In one aspect, each individual one of the lighting elements 20 can be oriented at a different angle Ω in the housing 11. The angle Ω can be set in a range between -50 ° and 0 ° relative to an initial position. The optical axis 23 of the individual lighting elements 20 can furthermore be individually adjusted in that the lighting elements 20 are rotated by an angle β before fixing. The angle β can be set in a range between -40 ° and 40 °. The angle β depends on the position of the respective lighting element 20 in the respective housing 11 and the respective application. Additive manufacturing enables the direction of radiation of the lighting elements 20 to be set by means of an integrated construction of the angle Ω and angle β in the housing 11. Rotatability and tilting of the individual lighting elements 20 by setting the angle S2 and angle β enables uniform illumination of the outside area 5 to be achieved As shown in FIG. 9, such a housing 11 can comprise a non-straight (curved) front 15a. However, the housing 11 can also have a straight front 15b, as indicated by the dash-dotted line. In one aspect, further openings or constructions, for example without the intention of limiting the invention for conduit routing and seals, can be created.
    The above geometrical calculations also apply to differently oriented light exit surfaces and asymmetrical beam patterns. The projection of the light exit surface onto a plane perpendicular to the optical axis 23 must be taken into account, as well as the vertical extent of the shielding element in relation to this light exit surface w of the lighting elements 20. Therefore, the above calculations are universal and do not limit the invention to the use of symmetrical focusing optics / s in the lighting elements 20, the use of planar shielding elements (since only the vertical displacement of the outer edge of the shielding elements with respect to the position of the lighting element is taken into account) or other features mentioned by way of example in this description.
    With the lighting system 100 disclosed here, a luminous flux of around 30,000 lumens per housing 11 can be achieved with a weight of less than 2 kilograms. With, for example, five housings 11 per luminaire 10, a luminous flux of around 150,000 lumens can be generated with a net weight of 10 kilograms. In addition, there is the weight of a holding device, such as a frame 50 from FIG. 3. Compared to the known lights from the prior art, this corresponds to a weight reduction of up to 50% with the same luminous flux, but with significantly better directed radiation. With ten luminaires 10, a luminous flux of around 1,500,000 lumens can thus be generated with a weight of around 20 kilograms per luminaire. Compared to the known lights from the prior art, this corresponds to a significantly lower weight per mast, since the more precise illumination achieved also requires less light than according to the prior art. This saves resources and also simplifies the installation of a lighting system 100 according to the invention.
    For example, to illuminate a category 4 football stadium (elite football stadium) with a required illuminance of about 140 lux and a playing area of 7,140 m 2 (square meters), a luminous flux of just under a million lumens would be required. With the lighting system 100 taught here, it would be possible to provide eight masts 12, the middle masts each comprising two lights 10 with five housings 11 each and four corner masts with one light 10 each with five housings 11.
    Reference number
    5 outside area / 6 first edge of the sports field 7 second edge of the sports field. 8 horizon 10 lamp 11 housing 12 mast 16 bottom 15a non-straight front 15b straight front 18 cover 20 lighting element (s) 21 shielding element (s) 22 upper area 23 optical axis 24 light-emitting diodes 25 light rays 26 lateral area 27 light exit surface 50 frame 510a, b ring-shaped elements 520a, b Spacer Plates 530a, b Curved Beams 540 Brackets 60 Fans 65 Cooling Channels 67 Cooling Elements
    权利要求:
    Claims (13)
    [1]
    1. A lighting system (100) comprising a plurality of lights (10) for illuminating outside areas (5), the lights (10) comprising:- a plurality of lighting elements (20), arranged in a non-coplanar manner on a frame (50) or in at least one housing (11), around a plurality of light beams (25) with an optical axis (23) substantially in the direction to produce the outer areas (5);- At least one shielding element (21), arranged in an upper region (22) of the plurality of lighting elements (20), arranged in such a way as to divert at least part of the plurality of light rays (25) in the direction of the horizon (8) and above the earth shield.
    [2]
    2. Lighting system (100) according to claim 1, wherein the lighting elements (20) are light-emitting diodes.
    [3]
    3. The lighting system (100) according to claim 2, further comprising bundling optics (28) for bundling light beams (25) in a specific direction.
    [4]
    4. The lighting system (100) according to any one of the preceding claims, wherein the lighting elements (20) comprise a plurality of light-emitting diodes which are arranged in at least one of an offset pattern or a hexagonal pattern.
    [5]
    5. Lighting system (100) according to one of claims 3 and 4, in which the light beams (25) emerge from the focusing optics (28) at an angle of less than 25 °.
    [6]
    6. The lighting system (100) according to any one of the preceding claims, wherein a plurality of the plurality of lighting elements (20) are arranged in a convex manner (40).
    [7]
    7. Lighting system (100) according to one of the preceding claims, in which the optical axes (23) of the plurality of lighting elements (20) intersect in a geometric spatial area in front of the lighting elements.
    [8]
    8. The lighting system (100) according to any one of the preceding claims, wherein a plurality of the plurality of lighting elements (20) are arranged in a frame (50) or in the housing (11).
    [9]
    9. Lighting system (100) according to claim 8, wherein the frame (50) and / or the housing (11) is attached to at least one mast (12).
    [10]
    10. Lighting system (100) according to one of the preceding claims, in which the at least one shielding element (21) is arranged on a lateral region (26).
    [11]
    11. Lighting system (100) according to one of the preceding claims, wherein a length (d) of the plurality of shielding elements (21) is less than 40 cm, preferably less than 20 cm.
    [12]
    12. Lighting system (100) according to one of the preceding claims, in which the plurality of lighting elements (20) have a light exit width (w) of less than 10 cm, preferably less than 5 cm.
    [13]
    13. Lighting system (100) according to one of the preceding claims, in which each individual one of the plurality of lighting elements (20) can be rotated by an angle β and tilted by an angle Ω.
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    同族专利:
    公开号 | 公开日
    WO2021122841A1|2021-06-24|
    引用文献:
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    WO2011058387A1|2009-11-11|2011-05-19|Eka Elektromos Készülékek És Anyagok Gyára Kft|Led based public lighting lamp|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH16292019|2019-12-16|
    GBGB2003801.4A|GB202003801D0|2020-03-16|2020-03-16|Lighting system for outdoor areas|
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