EP3685098B1 - Illumination module for emitting light directed in parallel - Google Patents

Illumination module for emitting light directed in parallel Download PDF

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Publication number
EP3685098B1
EP3685098B1 EP18773923.0A EP18773923A EP3685098B1 EP 3685098 B1 EP3685098 B1 EP 3685098B1 EP 18773923 A EP18773923 A EP 18773923A EP 3685098 B1 EP3685098 B1 EP 3685098B1
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EP
European Patent Office
Prior art keywords
reflector
led light
light source
illumination module
connecting web
Prior art date
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Application number
EP18773923.0A
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German (de)
French (fr)
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EP3685098A1 (en
Inventor
Michael TSCHAGER
Thomas Welz
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Litestudio OG
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Litestudio OG
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    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/51—Cooling arrangements using condensation or evaporation of a fluid, e.g. heat pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • F21S2/005—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction of modular construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S6/00—Lighting devices intended to be free-standing
    • F21S6/005—Lighting devices intended to be free-standing with a lamp housing maintained at a distance from the floor or ground via a support, e.g. standing lamp for ambient lighting
    • F21S6/007—Lighting devices intended to be free-standing with a lamp housing maintained at a distance from the floor or ground via a support, e.g. standing lamp for ambient lighting for indirect lighting only, e.g. torchiere with reflector bowl directed towards 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/04—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors
    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/503—Cooling arrangements characterised by the adaptation for cooling of specific components of light sources
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/56—Cooling arrangements using liquid coolants
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/71—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements
    • F21V29/713—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements in direct thermal and mechanical contact of each other to form a single system
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • F21V29/767—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section the planes containing the fins or blades having directions perpendicular to the light emitting axis
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the shape
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/0083—Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/06—Optical design with parabolic curvature
    • 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
    • F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
    • 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
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/406—Lighting for industrial, commercial, recreational or military use for theatres, stages or film studios
    • 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 invention relates to a light module for the emission of (preferably exclusively) parallel directed light in a main emission direction, having a reflector with a focal point located on its front side, at least one LED light source arranged essentially in the focal point of the reflector for irradiating light into the reflector, and a heat sink arranged on the rear of the reflector.
  • the invention further relates to a lighting device, in particular a film spotlight, for emitting light directed in parallel, having a number of lighting modules according to the invention.
  • LED light source has small spatial dimensions compared to a gas discharge lamp.
  • the light exit surface of an LED light source is comparatively small and can be easily arranged within a reflector.
  • the emission by an LED light source is generally inhomogeneous, i.e. the emission takes place in the form of a typically non-linear diverging light distribution and the light intensity varies depending on the emission angle.
  • the light modules known from the prior art have a high space requirement and / or are not suitable for realizing a parallel light emission that is as exact as possible.
  • DE 10 2007 028 301 discloses a light module according to the preamble of claim 1.
  • a light module of the type mentioned at the outset in which, according to the invention, the LED light source is oriented against the main emission direction, the reflector being set up to direct the light radiated into the reflector from the at least one LED light source in parallel and to emit it in the direction of the main emission direction, the at least one LED light source is held by means of at least one connecting web extending from the heat sink to the LED light source, the at least one connecting web being designed to conduct heat from the at least one LED light source to the cooling body, and the at least one connecting web, which is preferably at least partially made of metal exists, which thermally contacts at least one LED light source and the heat sink, the at least one connecting web also having means for electrically contacting the at least one LED light source.
  • the LED light source By aligning the LED light source against the main emission direction according to the invention, it is possible to compensate the emission characteristics of an LED light source by the reflector so that the light emitted by the light module can only be emitted as parallel light.
  • the expression “arranged essentially in the focal point” takes into account that the at least one LED light source - due to the spatial extent of its light exit surface - can never be located entirely exclusively in the focal point. However, in order to emit parallel light, efforts are made to arrange the LED light source as precisely as possible in this focal point or to arrange a center of gravity of the light exit surface in this focal point.
  • the lighting module according to the invention creates a compact lighting device for emitting light directed in parallel, which can basically be dimensioned with any large area by stringing together additional lighting modules.
  • the lighting module according to the invention is suitable for use by lighting technicians, gaffers, photographers, Production companies, light and camera rentals, sales of lighting equipment and in connection with event technology are particularly suitable.
  • the at least one connecting web is designed as a metal tube with cooling liquid accommodated within the metal tube.
  • the lighting module has at least two connecting webs, preferably exactly three connecting webs, which extend through the reflector to the at least one LED light source, the angle between the adjacent connecting webs within a plane normal to the main emission direction , is the same for all connecting webs.
  • two connecting webs are provided, they enclose an angle of 180 ° to one another; in the case of three connecting webs, these are arranged at an angle of 120 ° to each other, etc.
  • the means for electrically contacting the at least one LED light source is formed by the connecting web itself (the connecting web can therefore be designed to be electrically conductive) by forming at least one metallic electrical line along the connecting web as part of the connecting web.
  • the means for electrically contacting the at least one LED light source is formed by at least one separate electrical line guided along the web.
  • the heat sink, the reflector, the at least one connecting web and the at least one LED light source form a structural unit.
  • the front of the reflector is covered by a transparent protective glass, the at least one LED light source being enclosed between the reflector, housing and protective glass.
  • the reflector is delimited by side surfaces oriented parallel to the main emission direction (which can be designed as part of the reflector and / or as part of a housing) and the protective glass extends up to the side surfaces, the side surfaces also having the geometrical Determine the dimensions of the light module normal to the main radiation direction. Extending the transparent protective glass to the edge of the reflector and avoiding elements protruding over the edge enables the light modules to be strung together almost seamlessly, so that a homogeneous light transition between light modules arranged directly next to one another is possible.
  • the reflector extends continuously to all side surfaces, which ensures the most homogeneous and uniform radiation possible.
  • the protective glass and the reflector are sealed off from one another, and the at least one connecting web and the reflector are sealed off from one another.
  • the light module itself is thus sealed and thus protected against the entry of dust or water.
  • the at least one LED light source can be rigidly connected to the heat sink by means of the at least one connecting web, the reflector along an in Main emission direction oriented section of the at least one connecting web with respect to the at least one LED light source (or vice versa) is displaceable.
  • the reflector engages the heat sink by means of an adjusting screw, by means of which the reflector can be displaced in the main emission direction.
  • the LED can be moved out of the ideal focal point.
  • Focusing for adjusting the modules to one another, i.e. each module is adjusted individually.
  • Focusing whereby all modules can be coupled. This variant can be implemented with the aid of a servomotor, for example.
  • the ratio of the maximum LED light exit surface diagonal to the maximum reflector diagonal is a maximum of 1:20, preferably a maximum of 1:40.
  • a particularly reliable bundling of the light beams can thus be achieved.
  • the maximum diagonal corresponds to the circle diameter.
  • Particularly powerful parallel emitters can be implemented by means of the light module according to the invention.
  • the reflector surface and luminous flux of the LED are selected such that the illuminance is between 50,000 and 150,000 lx in the vicinity of the front side of the reflector in a plane normal to the main emission direction.
  • the expression close range is understood to mean a distance in the order of magnitude of one to five times the diameter of the reflector.
  • a primary lens in particular a lens and / or a mixing rod or a reflector, is attached to the at least one LED light source, by means of which the at least one LED light source emitted light distribution is changed.
  • a further possibility for optimization is created, which e.g. allows flatter reflector designs or the reduction of inhomogeneities within the light distribution emitted by the light module.
  • the The geometric shape of the light module is chosen such that an arbitrarily expandable, form-fitting, area-filling arrangement of light modules within a plane can be achieved by flat side-by-side and / or superimposed rows of individual light modules of the same geometrical shape.
  • the expression “stacking” is understood to mean an arrangement in which the light modules are arranged above or below one another within a normal plane formed in relation to the main emission direction.
  • a plurality of LED light sources are provided, which are designed to form a common remote phosphor light source, in that the LED light sources are followed by a common remote phosphor element which is used to convert the from the LED -Light sources of emitted light is set up, wherein the LED light sources are set up to emit light into the remote phosphor element.
  • the expression “plurality” is understood to mean a number greater than or equal to three.
  • a multiplicity of LEDs can preferably be arranged in a matrix. This can be, for example, LEDs that emit blue light that can be converted into white light, for example, by the remote phosphor element (the term “remote phosphor” is used as a synonym for a converter in the general sense). This arrangement makes it possible to achieve a particularly high power density of the light emission and still ensure satisfactory cooling of the light source, since the heat sources "LEDs” and “converters” are spaced apart so that the heat output is improved and temperature peaks can be reduced.
  • the LED light sources are arranged on a first carrier, the remote phosphor element being arranged on a second carrier, and holding means are provided for the detachable connection of the first and second carriers are established.
  • the LED light sources can be connected to different remote phosphor elements that are set up, for example, to emit light in different light distributions and color temperatures.
  • the primary optics 9 are firmly connected to the second carrier 14. As a result, the primary optics 9, including the associated remote phosphor elements, can be exchanged in a simple manner.
  • the invention further relates to a lighting device, in particular a film spotlight, for emitting parallel light, having a number of lighting modules according to the invention, wherein adjacent lighting modules adjoin one another in a form-fitting manner.
  • a number of is understood - unless stated otherwise - to mean a number which can be, for example, one, two, three, four or more, in particular six, eight, ten, fifteen, twenty or more.
  • the person skilled in the art is able to select the number of light modules according to the desired light exit surface of the lighting device.
  • the light modules are arranged in the form of a matrix, the matrix having at least n rows and at least m columns, where n and m are natural numbers and are at least 1, 2, 3, 4, 5, or at least 10 .
  • all of the light modules are arranged flat within a plane, the main direction of radiation of the individual light modules coinciding.
  • the lighting module or the lighting device according to the invention realizes a property that is very important for film use, namely a relatively large and homogeneous beam cross-section, shortly after it emerges from the lighting system.
  • White LEDs with the light color warm white, neutral white or cold white are preferably used, whereby exactly one LED can be provided per reflector. Alternatively, an array of small individual LEDs can be provided. A variant with a multi-chip LED can also be provided.
  • the LEDs can have different light colors, e.g. warm white and cold white and / or red, green or blue. As the LEDs can be controlled individually, both the light intensity and the light color can be varied in a targeted manner.
  • the modularity of the light modules is of particular advantage.
  • the connecting webs can be commercially available "heat pipes" made of liquid-filled metal pipes.
  • any other material with good thermal conductivity is also conceivable.
  • liquid cooling could also be considered.
  • connecting webs are preferably provided. If a change in color temperature is also planned, it is advantageous to use three connecting bridges (e.g. 1x common cathode and 2x an anode).
  • the reflector preferably has a parabolic contour and consists, for example, of injection molding on which a reflective layer is vapor-deposited, or of metal (e.g. formed from aluminum sheet).
  • Primary optics could, for example, be designed as a primary lens.
  • the light distribution of the LED i.e. how much light hits where and how strongly the reflector
  • the light distribution of the module is also influenced. This enables an optimal superposition of the individual modules to be achieved.
  • Figure 1a and b each show a schematic representation of the emission characteristics of a reflector arrangement according to the prior art, in which a light source, for example in the form of an LED, is arranged in the center of the reflector and emits light in a main emission direction. It can be seen that a portion of the light from the light source is reflected by the reflector and thus aligned, but also a remaining portion leaves the reflector unreflected at an exit angle of up to 40 °. Such arrangements are therefore hardly suitable for the imaging of exclusively parallel light.
  • a light source for example in the form of an LED
  • FIG. 2 shows a perspective view of an embodiment of a lighting module 1 according to the invention.
  • the lighting module 1 is set up to emit parallel light in a main emission direction x, and for this purpose has a reflector 2 with a focal point F located on its front side, at least one located in the focal point F of the reflector LED light source 3 for irradiating light into the reflector 2, and a heat sink 4 arranged on the rear side of the reflector 2.
  • the LED light source 3 is oriented against the main emission direction x (which in turn is oriented parallel to the optical axis of the reflector), the reflector 2 being set up to direct the light emitted from the at least one LED light source 3 into the reflector 2 in parallel and to emit in the direction of the main emission direction x.
  • the at least one LED light source 3 is held by means of at least one connecting web 5 extending from the heat sink 4 to the LED light source 3 - in the present embodiment, three connecting webs 5 are provided.
  • the at least one connecting web 5 is designed to conduct heat from the at least one LED light source 3 to the heat sink 4 and is preferably at least partially made of metal.
  • Each connecting web 5 is thermally connected to the at least one LED light source and the heat sink, the connecting web 5 also having means for electrically contacting the at least one LED light source 3.
  • These can be separate electrical lines, for example insulated electrical strands guided along the web 5, or lines integrated into the web 5 (the web 5 itself can be designed to be electrically conductive for this purpose).
  • Figure 3 shows a schematic sectional view of the light module 1 according to FIG Figure 2 . It can be seen that the front side of the reflector 2 is covered by a transparent protective glass 6, the at least one LED light source 3 being enclosed between the reflector 2, the housing 8 and the protective glass 6.
  • the at least one LED light source 3 is rigidly connected to the heat sink 4 by means of the at least one connecting web 5, the reflector 2 being displaceable along a section of the connecting webs 5 oriented in the main radiation direction x with respect to the at least one LED light source 3.
  • the reflector 2 engages the heat sink 4 by means of an adjusting screw 7, the reflector 2 being displaceable in relation to the light-emitting diode 3 by turning the adjusting screw 7 in the main emission direction x.
  • FIG. 4 shows an exploded view of the light module 1 according to FIG Figures 2 to 3 . It can be seen in this that the protective glass 6 engages a housing 8, that the side walls 2a of the reflector 2 are flush and that it extends up to the protective glass 6.
  • FIG. 5 shows a sectional view of a further embodiment of a lighting module 1 according to the invention.
  • primary optics 9 in the present case in the form of a primary lens, are attached to the at least one LED light source 3, by means of which the light distribution emitted by the at least one LED light source is changed.
  • Figures 6a to f show a schematic sectional illustration of further embodiments of a lighting module 1 according to the invention
  • the variant according to FIG Figure 6a has no primary optics
  • the primary optics 9 as a lens
  • in Figure 6c as a reflector
  • in Fig. 6d as a mixing rod (for mixing different light colors, which are radiated into the mixing rod, for example, through different light exit surfaces of a corresponding light source or corresponding light sources)
  • Figure 6e as a combination of mixing rod and primary lens
  • in Figure 6f is designed as a mixing rod with integrated exit optics on the light exit surface of the light rod.
  • Figure 7a shows a lighting device 10 according to the invention comprising a number of lighting modules 1 according to the invention, which are positively arranged next to one another and lined up one above the other within a plane.
  • Figure 7b FIG. 4 shows a through a lighting device 10 according to FIG Figure 7a generated silhouette. It can be seen that the shadow of the window shown therein is sharply outlined due to the parallel light emission and corresponds to a normal projection of the window onto the shadow plane.
  • Figures 9a and 9b show, in comparison, a lighting device according to the prior art, as well as a shadow image generated therewith. A blurred image of the shadow and the expansion of the shadow elements can be clearly seen in this.
  • Figure 8 shows a schematic illustration of the optical impression that a viewer receives from an operating lighting device 10 as a function of his position.
  • the emission of the light emitted by the lighting device 10 is directed parallel to a high degree, so that only those areas are perceived as light-emitting for a viewer that are directly in front of the eye in the main emission direction x.
  • FIGS 10a to 11b show a further embodiment of a section of a lighting module 1 according to the invention Figures 10a and 11a inserted.
  • the light module 1 includes therein a plurality of LED light sources 3, which are designed to form a common remote phosphor light source 12 by adding a common remote phosphor element 11 to the LED light sources 3 (see FIG Figure 11a ) downstream, which is set up to convert the light emitted by the LED light sources 3, the LED light sources 3 being set up to emit light into the remote phosphor element 11.
  • the LED light sources 3 and the downstream remote phosphor element 11 are spatially separated from one another or at a distance from one another.
  • the LED light sources 3 are arranged on a first carrier 13.
  • the remote phosphor element 11 is arranged on a second carrier 14, holding means 15 being provided which are designed for the detachable connection of the first 13 and second carrier 14.
  • the second carrier 14 has a groove on its circumference, into which holding means 15, which in the present example are designed as clamps, can engage in the fastened state.
  • the fortified state is in the Figures 10b and 11b recognizable.
  • the primary optics 9 are firmly connected to the second carrier 14.
  • the second carrier 14 can be designed as a separately manufactured body or also as an element manufactured in one casting with the lens 9.
  • the remote phosphor element 11 is spaced apart from the LED light sources 3, the LED light sources 3 being laterally enclosed by side walls 16 which, in the assembled state of the remote light source, extend as far as the remote phosphor element 11. These side walls 16 are highly reflective, so that the light emitted by the light sources 3 strikes the remote phosphor element 11 with as little loss as possible.
  • the primary optics 9, which are typically designed as a lens have a free-form lens contour that is adapted to the geometric shape of the light module 1 in such a way that the light emission of the light module 1 is as homogeneous as possible and the emitted light cone largely with it
  • the geometric shape of the light module 1 - measured as a normal projection onto the light emission direction - coincides, the geometric shape being limited by the side walls 2a and the emission extending as homogeneously as possible up to the side walls 2a and ending after these, so that when adjacent light modules are superimposed seamless homogeneous transition of the individual light distributions assigned to the light modules can take place.
  • the lens is preferably designed in such a way that its outer shape follows the reflector cut:
  • a square reflector requires a lens in which Repeat contour elements four times, with a hexagonal reflector the contour elements are repeated six times, etc.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Description

Die Erfindung betrifft ein Leuchtmodul zur Abstrahlung von (vorzugsweise ausschließlich) parallel gerichtetem Licht in eine Hauptabstrahlrichtung, aufweisend einen Reflektor mit einem an seiner Vorderseite liegenden Brennpunkt, zumindest eine im Wesentlichen im Brennpunkt des Reflektors angeordnete LED-Lichtquelle zur Einstrahlung von Licht in den Reflektor, und einen an der Rückseite des Reflektors angeordneten Kühlkörper.The invention relates to a light module for the emission of (preferably exclusively) parallel directed light in a main emission direction, having a reflector with a focal point located on its front side, at least one LED light source arranged essentially in the focal point of the reflector for irradiating light into the reflector, and a heat sink arranged on the rear of the reflector.

Ferner betrifft die Erfindung eine Beleuchtungsvorrichtung, insbesondere einen Filmscheinwerfer, zur Abstrahlung von parallel gerichtetem Licht, aufweisend eine Anzahl an erfindungsgemäßen Leuchtmodulen.The invention further relates to a lighting device, in particular a film spotlight, for emitting light directed in parallel, having a number of lighting modules according to the invention.

Aus dem Stand der Technik sind unterschiedliche Leuchtmodule zur Abstrahlung von parallel gerichteten Licht bekannt geworden. Herkömmliche Bühnenscheinwerfer zur Abstrahlung von parallel gerichteten Licht weisen z.B. Gasentladungslampen auf, die im Bereich eines Brennpunktes eines Reflektors angeordnet sind. Durch die räumliche Ausdehnung der Gasentladungslampen ist es allerdings nicht möglich, eine solche Lichtquelle ausschließlich im Brennpunkt des Reflektors anzuordnen. Herkömmliche Scheinwerfer dieser Art weisen eine nicht zu vernachlässigende Divergenz sowie beträchtliche räumliche Abmessungen auf, die der Herstellung einer kompakten flächigen Leuchte im Wege stehen.Different light modules for emitting light directed in parallel have become known from the prior art. Conventional stage spotlights for emitting light directed in parallel have, for example, gas discharge lamps that are arranged in the area of a focal point of a reflector. Due to the spatial extension of the gas discharge lamps, however, it is not possible to arrange such a light source exclusively in the focal point of the reflector. Conventional headlights of this type have a not negligible divergence and considerable spatial dimensions, which stand in the way of the production of a compact flat lamp.

Alternativ dazu wurden bereits Leuchtmodule mit LED-Lichtquellen vorgesehen. Die LED-Lichtquelle weist im Vergleich zu einer Gasentladungslampe geringe räumliche Abmessungen auf. Die Lichtaustrittsfläche einer LED-Lichtquelle ist vergleichsweise klein und lässt sich gut innerhalb eines Reflektors anordnen. Die Abstrahlung durch eine LED-Lichtquelle erfolgt im Allgemeinen inhomogen, d.h. die Abstrahlung erfolgt in Form einer typischerweise nichtlinearen divergierenden Lichtverteilung und die Lichtstärke variiert in Abhängigkeit von dem Abstrahlwinkel.Alternatively, light modules with LED light sources have already been provided. The LED light source has small spatial dimensions compared to a gas discharge lamp. The light exit surface of an LED light source is comparatively small and can be easily arranged within a reflector. The emission by an LED light source is generally inhomogeneous, i.e. the emission takes place in the form of a typically non-linear diverging light distribution and the light intensity varies depending on the emission angle.

Die aus dem Stand der Technik bekannten Leuchtmodule weisen einen hohen Platzbedarf auf und/oder sind nicht geeignet, eine möglichst exakte parallele Lichtabstrahlung zu realisieren. DE 10 2007 028 301 offenbart ein Leuchtmodul gemäß dem Oberbegriff des Anspruchs 1.The light modules known from the prior art have a high space requirement and / or are not suitable for realizing a parallel light emission that is as exact as possible. DE 10 2007 028 301 discloses a light module according to the preamble of claim 1.

Es ist daher eine Aufgabe der Erfindung, die genannten Nachteile des Standes der Technik zu überwinden. Diese Aufgabe wird durch ein Leuchtmodul der eingangs genannten Art gelöst, bei der erfindungsgemäß die LED-Lichtquelle entgegen der Hauptabstrahlrichtung orientiert ist, wobei der Reflektor dazu eingerichtet ist, das von der zumindest einen LED-Lichtquelle in den Reflektor eingestrahlte Licht parallel zu richten und in Richtung der Hauptabstrahlrichtung abzustrahlen, wobei die zumindest eine LED-Lichtquelle mittels zumindest einem von dem Kühlkörper hin zu der LED-Lichtquelle erstreckenden Verbindungssteg gehalten ist, wobei der zumindest eine Verbindungssteg zur Wärmeleitung von der zumindest einen LED-Lichtquelle hin zu dem Kühlkörper eingerichtet ist, und der zumindest eine Verbindungssteg, der vorzugsweise zumindest teilweise aus Metall besteht, die zumindest eine LED-Lichtquelle sowie den Kühlkörper thermisch kontaktiert, wobei der zumindest eine Verbindungssteg zudem Mittel zum elektrischen Kontaktieren der zumindest einen LED-Lichtquelle aufweist.It is therefore an object of the invention to overcome the stated disadvantages of the prior art. This object is achieved by a light module of the type mentioned at the outset, in which, according to the invention, the LED light source is oriented against the main emission direction, the reflector being set up to direct the light radiated into the reflector from the at least one LED light source in parallel and to emit it in the direction of the main emission direction, the at least one LED light source is held by means of at least one connecting web extending from the heat sink to the LED light source, the at least one connecting web being designed to conduct heat from the at least one LED light source to the cooling body, and the at least one connecting web, which is preferably at least partially made of metal exists, which thermally contacts at least one LED light source and the heat sink, the at least one connecting web also having means for electrically contacting the at least one LED light source.

Durch die erfindungsgemäße Ausrichtung der LED-Lichtquelle entgegen der Hauptabstrahlrichtung ist es möglich, die Abstrahlcharakteristik einer LED-Lichtquelle durch den Reflektor dahingehend auszugleichen, dass das durch das Leuchtmodul abgestrahlte Licht ausschließlich als parallel gerichtetes Licht abstrahlbar ist. Der Ausdruck "im Wesentlichen im Brennpunkt angeordnet" berücksichtigt dabei, dass die zumindest eine LED-Lichtquelle - aufgrund der räumlichen Ausdehnung ihrer Lichtaustrittsfläche - nie vollständig ausschließlich im Brennpunkt liegen kann. Allerdings wird zur Abstrahlung von parallel gerichtetem Licht danach getrachtet, die LED-Lichtquelle möglichst genau in diesem Brennpunkt anzuordnen bzw. einen Schwerpunkt der Lichtaustrittsfläche in diesem Brennpunkt anzuordnen.By aligning the LED light source against the main emission direction according to the invention, it is possible to compensate the emission characteristics of an LED light source by the reflector so that the light emitted by the light module can only be emitted as parallel light. The expression “arranged essentially in the focal point” takes into account that the at least one LED light source - due to the spatial extent of its light exit surface - can never be located entirely exclusively in the focal point. However, in order to emit parallel light, efforts are made to arrange the LED light source as precisely as possible in this focal point or to arrange a center of gravity of the light exit surface in this focal point.

Durch das erfindungsgemäße Leuchtmodul ist eine kompakte Leuchtvorrichtung zur Abstrahlung von parallel gerichtetem Licht geschaffen, die sich durch Aneinanderreihung weiterer Leuchtmodule grundsätzlich beliebig großflächig dimensionieren lässt.The lighting module according to the invention creates a compact lighting device for emitting light directed in parallel, which can basically be dimensioned with any large area by stringing together additional lighting modules.

Sie kann insbesondere in folgenden technischen Gebieten bzw. Produkten bzw. für folgende Zwecke eingesetzt werden: Film und Fotografie, Nachbildung von Sonnenlicht ohne die Makel anderer Ansätze (Stufenscheinwerfer, Arri M-Serie, PAR Scheinwerfer, Brut-Scheinwerfer), Light Tubes (Fotografie von Automobilen und großflächigen glänzenden Oberflächen, Softes Licht mit weichen Schatten). Insbesondere ist das erfindungsgemäße Leuchtmodul für den Einsatz durch Beleuchter, Oberbeleuchter, Fotografen, Produktionsfirmen, Licht- und Kamera-Verleihe, Vertriebe von Lichtequipment sowie im Zusammenhang mit Veranstaltungstechnik besonders geeignet.It can be used in particular in the following technical fields or products or for the following purposes: film and photography, reproduction of sunlight without the flaws of other approaches (step lights, Arri M series, PAR lights, brut lights), light tubes (photography of automobiles and large shiny surfaces, soft light with soft shadows). In particular, the lighting module according to the invention is suitable for use by lighting technicians, gaffers, photographers, Production companies, light and camera rentals, sales of lighting equipment and in connection with event technology are particularly suitable.

Durch das erfindungsgemäße Leuchtmodul lassen sich extrem enge Lichtbeams über große Distanzen realisieren. Auch sind Einzelpixel-Lösungen und RGB-Spezialeffekte bei Konzerten, in Theatern oder für Anwendungen im Bereich der Beleuchtung von Gebäuden denkbar. Ebenso lassen sich dadurch künstliche Sonnen (= Lichtflecken mit hohen Beleuchtungsstärken im Vergleich zur Umgebung in Gebäuden die Sonneneinstrahlung imitieren sollen), Flutlichtanlagen (Sport, Flughäfen, große Anlagen) oder engbündelnde Strahler (Fassadenbeleuchtung, Beleuchtung von Gebäuden und Brücken, Beleuchtung über große Distanzen) oder Suchscheinwerfer realisieren.With the light module according to the invention, extremely narrow light beams can be realized over large distances. Single pixel solutions and RGB special effects are also conceivable for concerts, in theaters or for applications in the field of lighting in buildings. It can also be used to create artificial suns (= spots of light with high illuminance levels compared to the surroundings in buildings that are supposed to imitate solar radiation), floodlight systems (sports, airports, large systems) or narrow spotlights (facade lighting, lighting of buildings and bridges, lighting over large distances) or realize searchlights.

Um eine besonders gut wärmeleitende stabile Verbindung der LED-Lichtquelle mit dem Kühlköper zu ermöglichen kann vorgesehen sein, dass der zumindest eine Verbindungssteg als Metallrohr mit innerhalb des Metallrohres aufgenommener Kühlflüssigkeit ausgebildet ist.In order to enable a particularly good heat-conducting, stable connection between the LED light source and the cooling body, it can be provided that the at least one connecting web is designed as a metal tube with cooling liquid accommodated within the metal tube.

Insbesondere kann vorgesehen sein, dass das Leuchtmodul zumindest zwei Verbindungsstege, bevorzugt genau drei Verbindungsstege, aufweist, die sich durch den Reflektor hindurch hin zur zumindest einen LED-Lichtquelle erstrecken, wobei der Winkel, den benachbarte Verbindungsstege innerhalb einer normal zur Hauptabstrahlrichtung gedachten Ebene zueinander einschließen, für alle Verbindungsstege gleich ist. Dadurch lässt sich eine besonders stabile Anordnung erzielen, mittels der die elektrische und thermische Kontaktierung der LED-Lichtquelle erleichtert werden kann. Sind zwei Verbindungsstege vorgesehen, so schließen diese einen Winkel von 180° zueinander ein; im Falle von drei Verbindungsstegen, sind diese in einem Winkel von 120° zueinander angeordnet, etc.In particular, it can be provided that the lighting module has at least two connecting webs, preferably exactly three connecting webs, which extend through the reflector to the at least one LED light source, the angle between the adjacent connecting webs within a plane normal to the main emission direction , is the same for all connecting webs. This makes it possible to achieve a particularly stable arrangement by means of which the electrical and thermal contacting of the LED light source can be facilitated. If two connecting webs are provided, they enclose an angle of 180 ° to one another; in the case of three connecting webs, these are arranged at an angle of 120 ° to each other, etc.

Vorteilhafterweise kann vorgesehen sein, dass das Mittel zum elektrischen Kontaktieren der zumindest einen LED-Lichtquelle durch den Verbindungsstegs selbst (der Verbindungssteg kann also elektrisch leitend ausgeführt sein) ausgebildet ist, indem zumindest eine metallische elektrische Leitung entlang des Verbindungssteges als Teil des Verbindungssteges ausgebildet ist.Advantageously, it can be provided that the means for electrically contacting the at least one LED light source is formed by the connecting web itself (the connecting web can therefore be designed to be electrically conductive) by forming at least one metallic electrical line along the connecting web as part of the connecting web.

Alternativ dazu kann vorgesehen sein, dass das Mittel zum elektrischen Kontaktieren der zumindest einen LED-Lichtquelle durch zumindest eine entlang dem Steg geführte separate elektrische Leitung ausgebildet ist.Alternatively, it can be provided that the means for electrically contacting the at least one LED light source is formed by at least one separate electrical line guided along the web.

Um ein besonders kompaktes und robustes Leuchtmodul zu schaffen, kann vorgesehen sein, dass der Kühlkörper, der Reflektor, der zumindest eine Verbindungssteg und die zumindest eine LED-Lichtquelle eine bauliche Einheit ausbilden.In order to create a particularly compact and robust light module, it can be provided that the heat sink, the reflector, the at least one connecting web and the at least one LED light source form a structural unit.

Gemäß der Erfindung ist die Vorderseite des Reflektors von einem transparenten Schutzglas abgedeckt, wobei die zumindest eine LED-Lichtquelle zwischen Reflektor, Gehäuse und Schutzglas eingeschlossen ist. Gemäß der Erfindung ist vorgesehen, dass der Reflektor durch parallel zur Hauptabstrahlrichtung orientierte Seitenflächen (die als Teil des Reflektors und/oder als Teil eines Gehäuses ausgebildet sein können) begrenzt ist und das Schutzglas sich bis zu den Seitenflächen erstreckt, wobei die Seitenflächen zudem die geometrischen Abmessungen des Leuchtmoduls normal zur Hauptabstrahlrichtung festlegen. Durch Erstreckung des transparenten Schutzglases bis zum Rand des Reflektors und die Vermeidung von über den Rand hinausstehender Elemente wird ermöglicht, dass die Leuchtmodule nahezu nahtlos aneinandergereiht werden können, sodass ein homogener Lichtübergang zwischen unmittelbar nebeneinander angeordneten Leuchtmodulen möglich ist. Der Reflektor erstreckt sich dabei durchgängig bis hin zu sämtichen Seitenflächen, wodurch eine möglichst homogene gleichmäßige Abstrahlung sichergestellt ist.According to the invention, the front of the reflector is covered by a transparent protective glass, the at least one LED light source being enclosed between the reflector, housing and protective glass. According to the invention it is provided that the reflector is delimited by side surfaces oriented parallel to the main emission direction (which can be designed as part of the reflector and / or as part of a housing) and the protective glass extends up to the side surfaces, the side surfaces also having the geometrical Determine the dimensions of the light module normal to the main radiation direction. Extending the transparent protective glass to the edge of the reflector and avoiding elements protruding over the edge enables the light modules to be strung together almost seamlessly, so that a homogeneous light transition between light modules arranged directly next to one another is possible. The reflector extends continuously to all side surfaces, which ensures the most homogeneous and uniform radiation possible.

Vorzugsweise kann vorgesehen sein, dass das Schutzglas sowie der Reflektor zueinander abgedichtet sind, und der zumindest eine Verbindungssteg sowie der Reflektor zueinander abgedichtet sind. Damit ist das Leuchtmodul selbst abgedichtet und somit gegenüber den Eintritt von Staub oder Wasser geschützt.It can preferably be provided that the protective glass and the reflector are sealed off from one another, and the at least one connecting web and the reflector are sealed off from one another. The light module itself is thus sealed and thus protected against the entry of dust or water.

Um die LED-Lichtquelle zur Optimierung der Fokussierung manuell genau im Brennpunkt anzuordnen - oder zum Zwecke einer geringfügigen Defokussierung aus diesem herauszurücken, kann die zumindest eine LED-Lichtquelle mittels dem zumindest einen Verbindungssteg starr mit dem Kühlkörper verbunden sein, wobei der Reflektor entlang eines in Hauptabstrahlrichtung orientierten Abschnitts des zumindest einen Verbindungsstegs in Bezug auf die zumindest eine LED-Lichtquelle (bzw. umgekehrt) verschiebbar ist. Als besonders zweckmäßige Ausführungsform kann zu diesem Zweck vorgesehen sein, dass zur Verschiebung des Reflektors in Bezug auf die zumindest eine LED-Lichtquelle der Reflektor mittels einer Justierschraube an dem Kühlkörper angreift, mittels derer der Reflektor in Hauptabstrahlrichtung verschiebbar ist. Zum Verändern der Lichtcharakteristik kann die LED aus dem idealen Brennpunkt heraus bewegt werden. Dies kann für spezielle Anwendungen vorteilhaft sein, wenn je nach Zielentfernung mehr oder weniger Licht auf eine bestimmte Fläche gelenkt werden soll. In diesem Zusammenhang sind auch andere Arten der Fokussierung bzw. Defokussierung denkbar: 1.) Fokussierung zur Justage der Module untereinander, jedes Modul wird also einzeln verstellt. 2.) Fokussierung, wobei alle Module gekoppelt sein können. Diese Variante kann z.B. unter Zuhilfenahme eines Stellmotors umgesetzt werden.In order to manually position the LED light source precisely in the focal point to optimize the focusing - or to move it out of it for the purpose of a slight defocusing, the at least one LED light source can be rigidly connected to the heat sink by means of the at least one connecting web, the reflector along an in Main emission direction oriented section of the at least one connecting web with respect to the at least one LED light source (or vice versa) is displaceable. As a particularly expedient embodiment, it can be provided for this purpose that for Displacement of the reflector with respect to the at least one LED light source, the reflector engages the heat sink by means of an adjusting screw, by means of which the reflector can be displaced in the main emission direction. To change the light characteristics, the LED can be moved out of the ideal focal point. This can be advantageous for special applications if, depending on the distance to the target, more or less light is to be directed onto a certain surface. In this context, other types of focusing or defocusing are also conceivable: 1.) Focusing for adjusting the modules to one another, i.e. each module is adjusted individually. 2.) Focusing, whereby all modules can be coupled. This variant can be implemented with the aid of a servomotor, for example.

Zur Begrenzung etwaiger Divergenz auf ein minimales Maß, kann vorgesehen sein, dass das Verhältnis von maximaler LED-Lichtaustrittsflächendiagonale zu maximaler Reflektordiagonale maximal 1:20, vorzugweise maximal 1:40, beträgt. Damit lässt sich eine besonders zuverlässige Bündelung der Lichtstrahlen erreichen. Im Falle von Kreisformen entspricht die maximale Diagonale dem Kreisdurchmesser.To limit any divergence to a minimum, it can be provided that the ratio of the maximum LED light exit surface diagonal to the maximum reflector diagonal is a maximum of 1:20, preferably a maximum of 1:40. A particularly reliable bundling of the light beams can thus be achieved. In the case of circular shapes, the maximum diagonal corresponds to the circle diameter.

Mittels dem erfindungsgemäßen Leuchtmodul lassen sich besonders leistungsstarke Parallelstrahler realisieren. Hierzu kann vorgesehen sein, dass die Reflektorfläche und Lichtstrom der LED dergestalt gewählt sind, dass im Nahbereich der Vorderseite des Reflektors in eine Normalebene zur Hauptabstrahlrichtung die Beleuchtungsstärke zwischen 50 000 und 150 000lx beträgt. Unter dem Ausdruck Nahbereich wird ein Abstand in der Größenordnung des ein bis fünffachen Durchmessers des Reflektors verstanden.Particularly powerful parallel emitters can be implemented by means of the light module according to the invention. For this purpose, it can be provided that the reflector surface and luminous flux of the LED are selected such that the illuminance is between 50,000 and 150,000 lx in the vicinity of the front side of the reflector in a plane normal to the main emission direction. The expression close range is understood to mean a distance in the order of magnitude of one to five times the diameter of the reflector.

Zur Optimierung der durch die LED-Lichtquelle abgestrahlten Lichtverteilung kann vorgesehen sein, dass an der zumindest einen LED-Lichtquelle eine Primäroptik, insbesondere eine Linse und/oder ein Mischstab oder ein Reflektor, angebracht ist, mittels der die durch die zumindest eine LED-Lichtquelle abstrahlte Lichtverteilung verändert ist. Auf diese Weise wird eine weitere Möglichkeit zur Optimierung geschaffen, die z.B. flachere Reflektorbauformen oder die Reduktion von Inhomogenitäten innerhalb der durch das Leuchtmodul abgestrahlten Lichtverteilung zulässt.To optimize the light distribution emitted by the LED light source, it can be provided that a primary lens, in particular a lens and / or a mixing rod or a reflector, is attached to the at least one LED light source, by means of which the at least one LED light source emitted light distribution is changed. In this way, a further possibility for optimization is created, which e.g. allows flatter reflector designs or the reduction of inhomogeneities within the light distribution emitted by the light module.

Um im Falle der Verwendung mehrerer Leuchtmodule einen möglichst homogenen Übergang zwischen den Leuchtmodulen erzielen zu können, kann vorgesehen sein, dass die geometrische Form des Leuchtmoduls dergestalt gewählt ist, dass durch flächige Neben- und/oder Übereinanderreihung einzelner Leuchtmodule derselben geometrischen Form eine beliebig erweiterbare formschlüssige flächenfüllende Anordnung von Leuchtmodulen innerhalb einer Ebene erzielbar ist. Unter dem Ausdruck "Übereinanderreihung" wird eine Anordnung verstanden, in der die Leuchtmodule innerhalb einer zur Hauptabstrahlrichtung gebildeten Normalebene oberhalb oder unterhalb zueinander angeordnet sind.In order to be able to achieve as homogeneous a transition as possible between the light modules when a plurality of light modules are used, it can be provided that the The geometric shape of the light module is chosen such that an arbitrarily expandable, form-fitting, area-filling arrangement of light modules within a plane can be achieved by flat side-by-side and / or superimposed rows of individual light modules of the same geometrical shape. The expression “stacking” is understood to mean an arrangement in which the light modules are arranged above or below one another within a normal plane formed in relation to the main emission direction.

Des Weiteren kann vorgesehen sein, dass eine Mehrzahl an LED-Lichtquellen vorgesehen ist, die zu einer gemeinsamen Remote-Phosphor-Lichtquelle ausgebildet sind, indem den LED-Lichtquellen ein gemeinsames Remote-Phosphor-Element nachgelagert ist, das zur Wandlung des von den LED-Lichtquellen abgestrahlten Lichts eingerichtet ist, wobei die LED-Lichtquellen zur Abstrahlung von Licht in das Remote-Phosphor-Element eingerichtet sind. Unter dem Ausdruck "Mehrzahl" wird eine Anzahl größer oder gleich drei verstanden. Vorzugsweise kann eine Vielzahl an LEDs in einer Matrix angeordnet sein. Dabei kann es sich beispielsweise um LEDs handeln, die blaues Licht abstrahlen, das durch das Remote-Phosphor-Element (der Ausdruck "Remote-Phosphor" wird als Synonym für einen Konverter im allgemeinen Sinn verwendet) beispielsweise in weißes Licht konvertiert werden kann. Durch diese Anordnung ist es möglich, eine besonders hohe Leistungsdichte der Lichtabstrahlung zu erzielen und dennoch eine zufriedenstellende Kühlung der Lichtquelle zu gewährleisten, da die Wärmequellen "LEDs" und "Konverter" zueinander beabstandet sind, sodass die Wärmeabgabe verbessert ist und Temperaturspitzen reduziert werden können.Furthermore, it can be provided that a plurality of LED light sources are provided, which are designed to form a common remote phosphor light source, in that the LED light sources are followed by a common remote phosphor element which is used to convert the from the LED -Light sources of emitted light is set up, wherein the LED light sources are set up to emit light into the remote phosphor element. The expression “plurality” is understood to mean a number greater than or equal to three. A multiplicity of LEDs can preferably be arranged in a matrix. This can be, for example, LEDs that emit blue light that can be converted into white light, for example, by the remote phosphor element (the term “remote phosphor” is used as a synonym for a converter in the general sense). This arrangement makes it possible to achieve a particularly high power density of the light emission and still ensure satisfactory cooling of the light source, since the heat sources "LEDs" and "converters" are spaced apart so that the heat output is improved and temperature peaks can be reduced.

Um beispielsweise das Abstrahlverhalten der Lichtquelle verändern zu können, kann vorgesehen sein, dass die LED-Lichtquellen auf einem ersten Träger angeordnet sind, wobei das Remote-Phosphor-Element auf einem zweiten Träger angeordnet ist, und wobei Haltemittel vorgesehen sind, die zur lösbaren Verbindung des ersten und zweiten Trägers eingerichtet sind. Dadurch können die LED-Lichtquellen mit unterschiedlichen Remote-Phosphor-Elementen verbunden werden, die beispielsweise zur Abstrahlung in unterschiedlichen Lichtverteilungen und Farbtemperaturen eingerichtet sind.In order to be able to change the radiation behavior of the light source, for example, it can be provided that the LED light sources are arranged on a first carrier, the remote phosphor element being arranged on a second carrier, and holding means are provided for the detachable connection of the first and second carriers are established. As a result, the LED light sources can be connected to different remote phosphor elements that are set up, for example, to emit light in different light distributions and color temperatures.

Zudem kann vorgesehen sein, dass die Primäroptik 9 mit dem zweiten Träger 14 fest verbunden ist. Dadurch lassen sich die Primäroptiken 9 auf einfache Weise inklusive der zugehörigen Remote-Phosphor-Elemente austauschen.In addition, it can be provided that the primary optics 9 are firmly connected to the second carrier 14. As a result, the primary optics 9, including the associated remote phosphor elements, can be exchanged in a simple manner.

Des Weiteren betrifft die Erfindung eine Beleuchtungsvorrichtung, insbesondere Filmscheinwerfer, zur Abstrahlung von parallel gerichtetem Licht, aufweisend eine Anzahl an erfindungsgemäßen Leuchtmodulen, wobei benachbarte Leuchtmodule formschlüssig aneinander angrenzen.The invention further relates to a lighting device, in particular a film spotlight, for emitting parallel light, having a number of lighting modules according to the invention, wherein adjacent lighting modules adjoin one another in a form-fitting manner.

Unter dem Ausdruck "eine Anzahl von" wird im Rahmen dieser Offenbarung - sofern nicht anders angegeben - eine Anzahl verstanden, die beispielsweise eins, zwei, drei, vier oder mehr, insbesondere sechs, acht, zehn, fünfzehn, zwanzig oder mehr betragen kann. Der Fachmann ist in der Lage, die Anzahl der Leuchtmodule entsprechend der erwünschten Lichtaustrittsfläche der Beleuchtungsvorrichtung zu wählen.In the context of this disclosure, the expression “a number of” is understood - unless stated otherwise - to mean a number which can be, for example, one, two, three, four or more, in particular six, eight, ten, fifteen, twenty or more. The person skilled in the art is able to select the number of light modules according to the desired light exit surface of the lighting device.

Zudem kann vorgesehen sein, dass die Leuchtmodule in Form einer Matrix angeordnet sind, wobei die Matrix zumindest n Zeilen und zumindest m Spalten aufweist, wobei n und m natürliche Zahlen sind und zumindest 1, 2, 3, 4, 5, oder zumindest 10 betragen.It can also be provided that the light modules are arranged in the form of a matrix, the matrix having at least n rows and at least m columns, where n and m are natural numbers and are at least 1, 2, 3, 4, 5, or at least 10 .

Um eine gleichgerichtete Abstrahlung mittels sämtlicher Leuchtmodule zu erreichen, kann vorgesehen sein, dass sämtliche Leuchtmodule flächig innerhalb einer Ebene angeordnet sind, wobei die Hauptabstrahlrichtung der einzelnen Leuchtmodule übereinstimmt.In order to achieve rectified radiation by means of all of the light modules, it can be provided that all of the light modules are arranged flat within a plane, the main direction of radiation of the individual light modules coinciding.

Bevor im Folgenden auf eine beispielhafte Ausführungsform der Erfindung näher eingegangen wird, folgen nun einige allgemeine Informationen im Zusammenhang mit der vorliegenden Erfindung.Before an exemplary embodiment of the invention is discussed in more detail below, some general information in connection with the present invention now follows.

Durch das erfindungsgemäße Leuchtmodul bzw. die Beleuchtungsvorrichtung ist eine für Filmanwendung sehr wichtige Eigenschaft, nämlich ein relativ großer und homogener Strahlquerschnitt bereits kurz nach dem Austritt aus dem Leuchtensystem verwirklicht.The lighting module or the lighting device according to the invention realizes a property that is very important for film use, namely a relatively large and homogeneous beam cross-section, shortly after it emerges from the lighting system.

Bei einem Verhältnis des Durchmessers der LED (LES [= Light Emitting Surface = Lichtaustrittsfläche]) zum Durchmesser des Moduls (Umkreis) von 1 zu 40 (reale Abmessungen vorzugsweise 3mm zu 120mm) lassen sich sehr engbündelnde Systeme bauen, die nahezu sonnenähnliche Lichteigenschaften aufweisen.With a ratio of the diameter of the LED (LES [= Light Emitting Surface = light emitting surface]) to the diameter of the module (circumference) of 1 to 40 (real dimensions preferably 3mm to 120mm), very tightly bundled systems can be built that have almost sun-like light properties.

Bevorzugt werden weiße LEDs mit der Lichtfarbe warmweiß, neutralweiß oder kaltweiß eingesetzt, wobei genau eine LED pro Reflektor vorgesehen sein kann. Alternativ dazu kann ein Array aus kleinen Einzel-LEDs vorgesehen sein. Auch kann eine Variante mit einer Mehrchip-LED vorgesehen sein. Die LEDs können unterschiedliche Lichtfarben, z.B. warmweiß und kaltweiß und/oder rot, grün oder blau aufweisen. Indem die LEDs gezielt einzeln angesteuert werden können, lässt sich sowohl die Leuchtintensität als auch die Lichtfarbe gezielt variieren.White LEDs with the light color warm white, neutral white or cold white are preferably used, whereby exactly one LED can be provided per reflector. Alternatively, an array of small individual LEDs can be provided. A variant with a multi-chip LED can also be provided. The LEDs can have different light colors, e.g. warm white and cold white and / or red, green or blue. As the LEDs can be controlled individually, both the light intensity and the light color can be varied in a targeted manner.

Einerseits ist die Modularität der Leuchtmodule von besonderem Vorteil. Andererseits ist es auch denkbar, die Leuchtmodule einzeln zu verwenden. So könnte z.B. ein einzelnes Hochleistungsmodul mit einer LED (LES=19mm) mit 500W und einem Reflektor mit einem Durchmesser von 500mm bis 700mm vorgesehen sein. Die Verbindungsstege können z.B. bei den kleinen Modulen handelsübliche "Heatpipes" aus flüssigkeitsgefüllten Metallrohren sein. Grundsätzlich ist auch jeder andere, thermisch gut leitbare Werkstoff denkbar. Bei leistungsstärkeren Modulen könnte auch eine Flüssigkeitskühlung angedacht werden.On the one hand, the modularity of the light modules is of particular advantage. On the other hand, it is also conceivable to use the light modules individually. For example, a single high-performance module with an LED (LES = 19mm) with 500W and a reflector with a diameter of 500mm to 700mm could be provided. In the case of the small modules, for example, the connecting webs can be commercially available "heat pipes" made of liquid-filled metal pipes. In principle, any other material with good thermal conductivity is also conceivable. For more powerful modules, liquid cooling could also be considered.

Sofern die Stromversorgung direkt über die Verbindungsstege als Leiter realisiert ist, sind vorzugsweise zwei Verbindungsstege vorgesehen. Sollte auch noch eine Farbtemperaturveränderung vorgesehen sein, ist die Anspeisung über drei Verbindungsstege vorteilhaft (z.B.1x gemeinsame Kathode und 2x eine Anode).If the power supply is implemented directly as a conductor via the connecting webs, two connecting webs are preferably provided. If a change in color temperature is also planned, it is advantageous to use three connecting bridges (e.g. 1x common cathode and 2x an anode).

Der Reflektor weist vorzugsweise eine parabelförmige Kontur auf und besteht beispielsweise aus Spritzguss, der mit einer reflektierenden Schicht bedampft wird, oder aus Metall (z.B. aus Alublech geformt).The reflector preferably has a parabolic contour and consists, for example, of injection molding on which a reflective layer is vapor-deposited, or of metal (e.g. formed from aluminum sheet).

Eine Primäroptik könnte z.B. als Primarlinse ausgebildet sein. Durch Veränderung der Lichtverteilung der LED (also wie viel Licht trifft wo und wie stark auf den Reflektor) wird auch die Lichtverteilung des Moduls beeinflusst. Damit kann man eine optimale Überlagerung der Einzelmodule erreichen.Primary optics could, for example, be designed as a primary lens. By changing the light distribution of the LED (i.e. how much light hits where and how strongly the reflector), the light distribution of the module is also influenced. This enables an optimal superposition of the individual modules to be achieved.

Die Erfindung ist im Folgenden anhand beispielhafter und nicht einschränkender Ausführungsformen näher erläutert, die in den Figuren veranschaulicht sind. Darin zeigt

  • Figur 1a und b) jeweils eine schematische Darstellung der Abstrahlcharakteristik einer Reflektoranordnung gemäß dem Stand der Technik,
  • Figur 2 eine perspektivische Darstellung einer Ausführungsform eines erfindungsgemäßen Leuchtmoduls,
  • Figur 3 eine schematische Schnittdarstellung des Leuchtmoduls gemäß Figur 2,
  • Figur 4 eine Explosionsdarstellung des Leuchtmoduls gemäß Figuren 2 bis 3,
  • Figur 5 eine Schnittdarstellung einer weiteren Ausführungsform eines erfindungsgemäßen Leuchtmoduls,
  • Figuren 6a bis f schematische Schnittdarstellung weiterer Ausführungsformen eines erfindungsgemäßen Leuchtmoduls,
  • Figur 7a eine erfindungsgemäße Beleuchtungsvorrichtung umfassend eine Anzahl an erfindungsgemäßen Leuchtmodulen,
  • Figur 7b ein durch eine Beleuchtungsvorrichtung gemäß Fig. 7a erzeugtes Schattenbild,
  • Figur 8 eine schematische Abbildung des optischen Eindrucks, den ein Betrachter von einer in Betrieb befindlichen Beleuchtungsvorrichtung in Abhängigkeit seiner Position erhält, und
  • Figur 9a eine Beleuchtungsvorrichtung gemäß dem Stand der Technik,
  • Figur 9b ein durch die Beleuchtungsvorrichtung gemäß Figur 9a erzeugtes Schattenbild,
  • Fig. 10a und Fig. 10b eine weitere Ausführungsform eines Ausschnitts eines erfindungsgemäßen Leuchtmoduls, bei der die Lichtquelle als Remote-Phosphor-Lichtquelle ausgebildet ist, und
  • Fig. 11a und Fig. 11b Schnittdarstellungen des Leuchtmoduls gemäß den Figuren 10a und 10b.
The invention is explained in more detail below on the basis of exemplary and non-limiting embodiments which are illustrated in the figures. In it shows
  • Figure 1a and b ) each a schematic representation of the radiation characteristics of a reflector arrangement according to the prior art,
  • Figure 2 a perspective view of an embodiment of a light module according to the invention,
  • Figure 3 a schematic sectional view of the light module according to Figure 2 ,
  • Figure 4 an exploded view of the light module according to Figures 2 to 3 ,
  • Figure 5 a sectional view of a further embodiment of a light module according to the invention,
  • Figures 6a to f schematic sectional illustration of further embodiments of a lighting module according to the invention,
  • Figure 7a a lighting device according to the invention comprising a number of light modules according to the invention,
  • Figure 7b a by a lighting device according to Figure 7a generated silhouette,
  • Figure 8 a schematic illustration of the optical impression that a viewer receives from a lighting device in operation as a function of his position, and
  • Figure 9a a lighting device according to the state of the art,
  • Figure 9b a by the lighting device according to Figure 9a generated silhouette,
  • Figures 10a and 10b a further embodiment of a section of a light module according to the invention, in which the light source is designed as a remote phosphor light source, and
  • Figures 11a and 11b Sectional views of the light module according to Figures 10a and 10b .

In den folgenden Figuren bezeichnen - sofern nicht anders angegeben - gleiche Bezugszeichen gleiche Merkmale.In the following figures, unless otherwise stated, the same reference symbols denote the same features.

Figur 1a und b) zeigen jeweils eine schematische Darstellung der Abstrahlcharakteristik einer Reflektoranordnung gemäß dem Stand der Technik, bei der eine Lichtquelle, beispielsweise in Form einer LED, im Zentrum des Reflektors angeordnet ist und Licht in eine Hauptabstrahlrichtung abstrahlt. Darin ist erkennbar, dass ein Anteil des Lichts der Lichtquelle einerseits durch den Reflektor reflektiert und damit ausgerichtet wird, andererseits aber auch ein verbleibender Anteil den Reflektor unreflektiert unter einem Austrittswinkel von bis zu 40° verlässt. Solche Anordnungen sind daher für die Abbildung von ausschließlich parallel gerichtetem Licht kaum geeignet. Figure 1a and b ) each show a schematic representation of the emission characteristics of a reflector arrangement according to the prior art, in which a light source, for example in the form of an LED, is arranged in the center of the reflector and emits light in a main emission direction. It can be seen that a portion of the light from the light source is reflected by the reflector and thus aligned, but also a remaining portion leaves the reflector unreflected at an exit angle of up to 40 °. Such arrangements are therefore hardly suitable for the imaging of exclusively parallel light.

Figur 2 zeigt eine perspektivische Darstellung einer Ausführungsform eines erfindungsgemäßen Leuchtmoduls 1. Das Leuchtmodul 1 ist zur Abstrahlung von parallel gerichtetem Licht in eine Hauptabstrahlrichtung x eingerichtet, und weist hierzu einen Reflektor 2 mit einem an seiner Vorderseite liegenden Brennpunkt F, zumindest eine im Brennpunkt F des Reflektors angeordnete LED-Lichtquelle 3 zur Einstrahlung von Licht in den Reflektor 2, und einen an der Rückseite des Reflektors 2 angeordneten Kühlkörper 4 auf. Figure 2 shows a perspective view of an embodiment of a lighting module 1 according to the invention. The lighting module 1 is set up to emit parallel light in a main emission direction x, and for this purpose has a reflector 2 with a focal point F located on its front side, at least one located in the focal point F of the reflector LED light source 3 for irradiating light into the reflector 2, and a heat sink 4 arranged on the rear side of the reflector 2.

Die LED-Lichtquelle 3 ist entgegen der Hauptabstrahlrichtung x (die wiederum parallel zur optischen Achse des Reflektors orientiert ist) orientiert, wobei der Reflektor 2 dazu eingerichtet ist, das von der zumindest einen LED-Lichtquelle 3 in den Reflektor 2 eingestrahlte Licht parallel zu richten und in Richtung der Hauptabstrahlrichtung x abzustrahlen. Die zumindest eine LED-Lichtquelle 3 ist mittels zumindest einem von dem Kühlkörper 4 hin zu der LED-Lichtquelle 3 erstreckenden Verbindungssteg 5 gehalten - in der vorliegenden Ausführungsform sind drei Verbindungsstege 5 vorgesehen. Der zumindest eine Verbindungssteg 5 ist zur Wärmeleitung von der zumindest einen LED-Lichtquelle 3 hin zu dem Kühlkörper 4 eingerichtet und besteht vorzugsweise zumindest teilweise aus Metall. Jeder Verbindungssteg 5 ist thermisch mit der zumindest einen LED-Lichtquelle sowie dem Kühlkörper verbunden, wobei der Verbindungssteg 5 zudem Mittel zum elektrischen Kontaktieren der zumindest einen LED-Lichtquelle 3 aufweist. Dabei kann es sich um separate elektrische Leitungen, beispielsweise um entlang des Steges 5 geführte isolierte elektrische Litzen, oder aber um in den Steg 5 integrierte Leitungen (der Steg 5 kann hierzu selbst elektrisch leitend ausgeführt sein), handeln.The LED light source 3 is oriented against the main emission direction x (which in turn is oriented parallel to the optical axis of the reflector), the reflector 2 being set up to direct the light emitted from the at least one LED light source 3 into the reflector 2 in parallel and to emit in the direction of the main emission direction x. The at least one LED light source 3 is held by means of at least one connecting web 5 extending from the heat sink 4 to the LED light source 3 - in the present embodiment, three connecting webs 5 are provided. The at least one connecting web 5 is designed to conduct heat from the at least one LED light source 3 to the heat sink 4 and is preferably at least partially made of metal. Each connecting web 5 is thermally connected to the at least one LED light source and the heat sink, the connecting web 5 also having means for electrically contacting the at least one LED light source 3. These can be separate electrical lines, for example insulated electrical strands guided along the web 5, or lines integrated into the web 5 (the web 5 itself can be designed to be electrically conductive for this purpose).

Figur 3 zeigt eine schematische Schnittdarstellung des Leuchtmoduls 1 gemäß Figur 2. Darin ist erkennbar, dass die Vorderseite des Reflektors 2 von einem transparenten Schutzglas 6 abgedeckt ist, wobei die zumindest eine LED-Lichtquelle 3 zwischen Reflektor 2, Gehäuse 8 und dem Schutzglas 6 eingeschlossen ist. Die zumindest eine LED-Lichtquelle 3 ist mittels dem zumindest einen Verbindungssteg 5 starr mit dem Kühlkörper 4 verbunden, wobei der Reflektor 2 entlang eines in Hauptabstrahlrichtung x orientierten Abschnitts der Verbindungsstege 5 in Bezug auf die zumindest eine LED-Lichtquelle 3 verschiebbar ist. Zur Verschiebung des Reflektors 2 in Bezug auf die zumindest eine LED-Lichtquelle 3 greift der Reflektor 2 mittels einer Justierschraube 7 an dem Kühlkörper 4 an, wobei der Reflektor 2 durch Drehung der Justierschraube 7 in Hauptabstrahlrichtung x in Bezug auf die Leuchtdiode 3 verschiebbar ist. Figure 3 shows a schematic sectional view of the light module 1 according to FIG Figure 2 . It can be seen that the front side of the reflector 2 is covered by a transparent protective glass 6, the at least one LED light source 3 being enclosed between the reflector 2, the housing 8 and the protective glass 6. The at least one LED light source 3 is rigidly connected to the heat sink 4 by means of the at least one connecting web 5, the reflector 2 being displaceable along a section of the connecting webs 5 oriented in the main radiation direction x with respect to the at least one LED light source 3. To move the reflector 2 in relation to the at least one LED light source 3, the reflector 2 engages the heat sink 4 by means of an adjusting screw 7, the reflector 2 being displaceable in relation to the light-emitting diode 3 by turning the adjusting screw 7 in the main emission direction x.

Figur 4 zeigt eine Explosionsdarstellung des Leuchtmoduls 1 gemäß Figuren 2 bis 3. Darin ist erkennbar, dass das Schutzglas 6 an einem Gehäuse 8 angreift, dass die Seitenwände 2a des Reflektors 2 bündig umschließt und bis zu dem Schutzglas 6 verlängert. Figure 4 shows an exploded view of the light module 1 according to FIG Figures 2 to 3 . It can be seen in this that the protective glass 6 engages a housing 8, that the side walls 2a of the reflector 2 are flush and that it extends up to the protective glass 6.

Figur 5 zeigt eine Schnittdarstellung einer weiteren Ausführungsform eines erfindungsgemäßen Leuchtmoduls 1. Darin ist an der zumindest einen LED-Lichtquelle 3 eine Primäroptik 9, im vorliegenden Fall in Form einer Primärlinse, angebracht, mittels der die durch die zumindest eine LED-Lichtquelle abstrahlte Lichtverteilung verändert ist. Figure 5 shows a sectional view of a further embodiment of a lighting module 1 according to the invention. In this, primary optics 9, in the present case in the form of a primary lens, are attached to the at least one LED light source 3, by means of which the light distribution emitted by the at least one LED light source is changed.

Figuren 6a bis f zeigen schematische Schnittdarstellung weiterer Ausführungsformen eines erfindungsgemäßen Leuchtmoduls 1, wobei die Variante gemäß Fig. 6a keine Primäroptik aufweist, bei der Variante gemäß Fig. 6b die Primäroptik 9 als Linse, in Fig. 6c als Reflektor, in Fig. 6d als Mischstab (zur Mischung von unterschiedlichen Lichtfarben, die beispielsweise durch unterschiedliche Lichtaustrittsflächen einer entsprechenden Lichtquelle oder entsprechender Lichtquellen in den Mischstab eingestrahlt werden), in Fig. 6e als Kombination aus Mischstab und Primärlinse und in Figur 6f als Mischstab mit integrierter Austrittsoptik an der Lichtaustrittsfläche des Lichtstabes ausgebildet ist. Figures 6a to f show a schematic sectional illustration of further embodiments of a lighting module 1 according to the invention, the variant according to FIG Figure 6a has no primary optics, in the variant according to Figure 6b the primary optics 9 as a lens, in Figure 6c as a reflector, in Fig. 6d as a mixing rod (for mixing different light colors, which are radiated into the mixing rod, for example, through different light exit surfaces of a corresponding light source or corresponding light sources), in Figure 6e as a combination of mixing rod and primary lens and in Figure 6f is designed as a mixing rod with integrated exit optics on the light exit surface of the light rod.

Figur 7a zeigt eine erfindungsgemäße Beleuchtungsvorrichtung 10 umfassend eine Anzahl an erfindungsgemäßen Leuchtmodulen 1, die formschlüssig nebeneinander und übereinander gereiht innerhalb einer Ebene angeordnet sind. Figur 7b zeigt ein durch eine Beleuchtungsvorrichtung 10 gemäß Fig. 7a erzeugtes Schattenbild. Darin ist erkennbar, dass der Schatten des darin dargestellten Fensters aufgrund der parallelen Lichtabstrahlung scharf umrissen ist und einer Normalprojektion des Fensters auf die Schattenebene entspricht. Figure 7a shows a lighting device 10 according to the invention comprising a number of lighting modules 1 according to the invention, which are positively arranged next to one another and lined up one above the other within a plane. Figure 7b FIG. 4 shows a through a lighting device 10 according to FIG Figure 7a generated silhouette. It can be seen that the shadow of the window shown therein is sharply outlined due to the parallel light emission and corresponds to a normal projection of the window onto the shadow plane.

Figur 9a und 9b zeigen im Vergleich dazu eine Beleuchtungsvorrichtung gemäß dem Stand der Technik, sowie ein damit erzeugtes Schattenbild. Darin ist eine unscharfe Abbildung des Schattens und die Aufweitung der Schattenelemente deutlich erkennbar. Figures 9a and 9b show, in comparison, a lighting device according to the prior art, as well as a shadow image generated therewith. A blurred image of the shadow and the expansion of the shadow elements can be clearly seen in this.

Figur 8 zeigt eine schematische Abbildung des optischen Eindrucks, den ein Betrachter von einer in Betrieb befindlichen Beleuchtungsvorrichtung 10 in Abhängigkeit seiner Position erhält. Die Abstrahlung des durch die Beleuchtungsvorrichtung 10 abgestrahlten Lichts ist in einem hohem Maß parallel gerichtet, sodass für einen Betrachter nur jene Bereiche als lichtemittierend wahrgenommen werden, die direkt in Hauptabstrahlrichtung x vor dem Auge liegen. Figure 8 shows a schematic illustration of the optical impression that a viewer receives from an operating lighting device 10 as a function of his position. The emission of the light emitted by the lighting device 10 is directed parallel to a high degree, so that only those areas are perceived as light-emitting for a viewer that are directly in front of the eye in the main emission direction x.

Figuren 10a bis 11b zeigen eine weitere Ausführungsform eines Ausschnitts eines erfindungsgemäßen Leuchtmoduls 1. Zur besseren Übersicht wurden Bezugszeichen lediglich in den Figuren 10a und 11a eingefügt. Das Leuchtmodul 1 umfasst darin eine Mehrzahl an LED-Lichtquellen 3, die zu einer gemeinsamen Remote-Phosphor-Lichtquelle 12 ausgebildet sind, indem den LED-Lichtquellen 3 ein gemeinsames Remote-Phosphor-Element 11 (siehe Fig. 11a) nachgelagert ist, das zur Wandlung des von den LED-Lichtquellen 3 abgestrahlten Lichts eingerichtet ist, wobei die LED-Lichtquellen 3 zur Abstrahlung von Licht in das Remote-Phosphor-Element 11 eingerichtet sind. Die LED-Lichtquellen 3 und das nachgelagerte Remote-Phosphor-Element 11 sind dabei räumlich voneinander getrennt bzw. zueinander beabstandet. Figures 10a to 11b show a further embodiment of a section of a lighting module 1 according to the invention Figures 10a and 11a inserted. The light module 1 includes therein a plurality of LED light sources 3, which are designed to form a common remote phosphor light source 12 by adding a common remote phosphor element 11 to the LED light sources 3 (see FIG Figure 11a ) downstream, which is set up to convert the light emitted by the LED light sources 3, the LED light sources 3 being set up to emit light into the remote phosphor element 11. The LED light sources 3 and the downstream remote phosphor element 11 are spatially separated from one another or at a distance from one another.

Die LED-Lichtquellen 3 sind auf einem ersten Träger 13 angeordnet. Das Remote-Phosphor-Element 11 ist auf einem zweiten Träger 14 angeordnet, wobei Haltemittel 15 vorgesehen sind, die zur lösbaren Verbindung des ersten 13 und zweiten Trägers 14 eingerichtet sind. Wie in Figuren 11a und 11b deutlich zu erkennen ist, weist der zweite Träger 14 an seinem Umfang eine Nut auf, in die Haltemittel 15, die im vorliegenden Beispiel als Klemmen ausgebildet sind, im befestigten Zustand eingreifen können. Der befestigte Zustand ist in den Figuren 10b und 11b erkennbar. Dabei ist die Primäroptik 9 mit dem zweiten Träger 14 fest verbunden. Der zweite Träger 14 kann als separat hergestellter Körper oder auch als mit der Linse 9 in einem Guss hergestelltes Element ausgebildet sein.The LED light sources 3 are arranged on a first carrier 13. The remote phosphor element 11 is arranged on a second carrier 14, holding means 15 being provided which are designed for the detachable connection of the first 13 and second carrier 14. As in Figures 11a and 11b As can be clearly seen, the second carrier 14 has a groove on its circumference, into which holding means 15, which in the present example are designed as clamps, can engage in the fastened state. The fortified state is in the Figures 10b and 11b recognizable. The primary optics 9 are firmly connected to the second carrier 14. The second carrier 14 can be designed as a separately manufactured body or also as an element manufactured in one casting with the lens 9.

Durch die Verwendung einer solchen Remote-Phosphor-Lichtquelle 12 ergeben sich die folgenden Vorteile:

  • Homogen beaufschlagte Lichtaustrittsfläche,
  • Ausfall einer Einzel-LED wird wahrscheinlich nicht wahrgenommen,
  • "Fliegengitterabbildung" bei bestimmten Fokusstellungen wird verhindert (Anmerkung: bei bestimmten Fokusstellungen bilden sich die Einzelchips von Multichip-LEDs (oder LEDArrays) in der Zielebene ab - die Abbildung ähnelt dabei einem Hell-Dunkel-Raster, vor allem wenn sehr viele Einzel-Chips zu einer flächigen Anordnung verschalten werden,
  • die Konversationsschicht ist vom LED-Chip und damit von der Hauptwärmequelle getrennt,
  • Abmessungen und Form der betreffenden Komponenten können beinahe frei gewählt werden,
  • leichte spektrale Anpassung des Lichtes auch bei geringeren Stückzahlen (wodurch die Entwicklung einer serienfähigen COB-LED nicht erforderlich ist).
The use of such a remote phosphor light source 12 results in the following advantages:
  • Homogeneously exposed light exit surface,
  • Failure of a single LED is probably not noticed,
  • "Fly screen imaging" with certain focus positions is prevented (note: with certain focus positions, the individual chips of multichip LEDs (or LED arrays) are shown in the target plane - the image resembles a light-dark grid, especially if there are a lot of individual chips be interconnected to form a flat arrangement,
  • the conversation layer is separated from the LED chip and thus from the main heat source,
  • Dimensions and shape of the relevant components can be chosen almost freely,
  • slight spectral adjustment of the light even with smaller quantities (which means that the development of a COB-LED suitable for series production is not necessary).

Das Remote-Phosphor-Element 11 ist zu den LED-Lichtquellen 3 beabstandet, wobei die LED-Lichtquellen 3 seitlich durch Seitenwände 16 eingeschlossen sind, die sich im zusammengebauten Zustand der Remote-Lichtquelle bis hin zu dem Remote-Phosphor-Element 11 erstrecken. Diese Seitenwände 16 sind hochreflektierend, sodass das von den Lichtquellen 3 abstrahlte Licht möglichst verlustfrei auf das Remote-Phosphor-Element 11 auftrifft.The remote phosphor element 11 is spaced apart from the LED light sources 3, the LED light sources 3 being laterally enclosed by side walls 16 which, in the assembled state of the remote light source, extend as far as the remote phosphor element 11. These side walls 16 are highly reflective, so that the light emitted by the light sources 3 strikes the remote phosphor element 11 with as little loss as possible.

Zudem kann vorgesehen sein, dass die Primäroptik 9, die typischerweise als Linse ausgebildet ist, eine Freiform-Linsenkontur aufweist, die dergestalt an die geometrische Form des Leuchtmoduls 1 angepasst ist, dass die Lichtabstrahlung des Leuchtmoduls 1 möglichst homogen erfolgt und der abgestrahlte Lichtkegel weitgehend mit der geometrischen Form des Leuchtmoduls 1 - gemessen als Normalprojektion auf die Lichtabstrahlrichtung - zusammenfällt, wobei die geometrische Form durch die Seitenwände 2a begrenzt ist und sich die Abstrahlung möglichst homogen bis hin zu den Seitenwänden 2a erstreckt und nach diesen endet, sodass bei Überlagerung benachbarter Lichtmodule an nahtloser homogener Übergang der einzelnen den Lichtmodulen zugeordneten Lichtverteilungen erfolgen kann. D.h. die Linse ist vorzugsweise dergestalt ausgebildet, dass Ihre äußere Form der Reflektorbeschneidung folgt: Ein quadratischer Reflektor bedingt eine Linse, bei der sich Konturelemente viermal wiederholen, bei einem hexagonalen Reflektor wiederholen sich die Konturelemente sechsmal etc.In addition, it can be provided that the primary optics 9, which are typically designed as a lens, have a free-form lens contour that is adapted to the geometric shape of the light module 1 in such a way that the light emission of the light module 1 is as homogeneous as possible and the emitted light cone largely with it The geometric shape of the light module 1 - measured as a normal projection onto the light emission direction - coincides, the geometric shape being limited by the side walls 2a and the emission extending as homogeneously as possible up to the side walls 2a and ending after these, so that when adjacent light modules are superimposed seamless homogeneous transition of the individual light distributions assigned to the light modules can take place. In other words, the lens is preferably designed in such a way that its outer shape follows the reflector cut: A square reflector requires a lens in which Repeat contour elements four times, with a hexagonal reflector the contour elements are repeated six times, etc.

In Anbetracht dieser Lehre ist der Fachmann in der Lage, ohne erfinderisches Zutun zu anderen, nicht gezeigten Ausführungsformen der Erfindung zu gelangen. Die Erfindung ist daher nicht auf die gezeigte Ausführungsform beschränkt. Auch können einzelne Aspekte der Erfindung bzw. der Ausführungsform aufgegriffen und miteinander kombiniert werden. Wesentlich sind die der Erfindung zugrunde liegenden Gedanken, die durch einen Fachmann in Kenntnis dieser Beschreibung in mannigfaltiger Weise ausgeführt werden können und trotzdem als solche aufrechterhalten bleiben. Etwaige Bezugszeichen in den Ansprüchen sind beispielhaft und dienen nur der einfacheren Lesbarkeit der Ansprüche, ohne diese einzuschränken.In view of this teaching, the person skilled in the art is able to arrive at other, not shown embodiments of the invention without inventive activity. The invention is therefore not restricted to the embodiment shown. Individual aspects of the invention or the embodiment can also be taken up and combined with one another. What is essential are the ideas on which the invention is based, which can be carried out in various ways by a person skilled in the art with knowledge of this description and are nevertheless maintained as such. Any reference signs in the claims are exemplary and only serve to make the claims easier to read, without restricting them.

Claims (15)

  1. An illumination module (1) for emitting light directed in parallel in a main emission direction (x), the illumination module comprising
    - a reflector (2) with a focus (F) lying on the front side thereof,
    - at least one LED light source (3) arranged substantially at the focus (F) of the reflector (2) for radiating light into the reflector (2),
    - and a heat sink (4) arranged on the rear side of the reflector (2),
    wherein the LED light source (3) is oriented counter to the main emission direction (x), wherein the reflector (2) is configured to direct the light radiated into the reflector (2) by the at least one LED light source (3) in parallel and emit said light in the direction of the main emission direction (x), wherein the at least one LED light source (3) is held by means of at least one connecting web (5) extending from the heat sink (4) to the LED light source (3), the at least one connecting web (5) being designed to conduct heat from the at least one LED light source (3) into the heat sink (4), and the at least one connecting web (5), which preferably consists at least partially of metal, thermally contacts the at least one LED light source (3) and the heat sink (4), wherein the at least one connecting web (5) additionally comprises means for electrically contacting the at least one LED light source (3), wherein the front side of the reflector (2) is covered by a transparent protective glass (6) and a housing (8), wherein the at least one LED light source (3) is enclosed between the reflector (2), the housing (8) and protective glass (6), characterized in that the reflector (2) is delimited by side faces (2a) oriented parallel to the main emission direction (x) and the protective glass (6) extends as far as the side faces (2a), wherein the side faces (2a) additionally define the geometric dimensions of the illumination module normal to the main emission direction (x), wherein the geometric shape of the illumination module (1) is selected in such a way that an arbitrarily extendable form-fitting, area-filling arrangement of illumination modules (1) within a plane is attainable due to a planar arrangement side-by-side and/or above one another of individual illumination modules (1) having the same geometric shape.
  2. The illumination module (1) according to claim 1, wherein the at least one connecting web (5) is formed as a metal pipe with cooling liquid received inside the metal pipe.
  3. The illumination module (1) according to claim 1 or 2, wherein the illumination module (1) has at least two connecting webs, preferably exactly three connecting webs, which extend through the reflector (2) towards the at least one LED light source (3), wherein the angle which adjacent connecting webs enclose with one another within a virtual plane normal to the main emission direction (x) is the same for all connecting webs (5).
  4. The illumination module (1) according to any one of the preceding claims, wherein the means for electrically contacting the at least one LED light source (3) is formed by the connecting web (5) itself by forming at least one metal electrical line along the connecting web (5) as part of the connecting web (5), or wherein the means for electrically contacting the at least one LED light source (3) is formed by at least one separate electrical line guided along the connecting web (5).
  5. The illumination module (1) according to any one of the preceding claims, wherein the heat sink, the reflector (2), the at least one connecting web (5) and the at least one LED light source (3) form a structural unit.
  6. The illumination module (1) according to any one of the preceding claims, wherein the protective glass (6) and the reflector (2) are sealed with respect to one another, and the at least one connecting web (5) and the reflector are sealed with respect to one another.
  7. The illumination module (1) according to any one of the preceding claims, wherein the at least one LED light source (3) is rigidly connected to the heat sink (4) by means of the at least one connecting web (5), wherein the reflector (2) is displaceable in relation to the at least one LED light source (3) along a portion of the connecting web (5), which portion is oriented in the main emission direction (x), wherein preferably for displacement of the reflector (2) in relation to the at least one LED light source (3), the reflector (2) acts on the heat sink (4) by means of an adjustment screw (7), by means of which the reflector (2) is displaceable in the main emission direction (x).
  8. The illumination module (1) according to any one of the preceding claims, wherein the ratio of maximum LED light emitting surface diagonal to maximum reflector diagonal is at most 1:20, preferably at most 1:40.
  9. The illumination module (1) according to any one of the preceding claims, wherein the reflector surface and luminous flux of the LED are selected in such a way that the illumination in the vicinity of the front side of the reflector (2) in a plane normal to the main emission direction (x) is between 50,000 and 150,000 lx.
  10. The illumination module (1) according to any one of the preceding claims, wherein a primary optics (9), in particular a lens and/or a mixing rod or a reflector (2), is attached to the at least one LED light source (3), by means of which primary optics the light distribution emitted by the at least one LED light source (3) is changed.
  11. The illumination module (1) according to any one of the preceding claims, wherein a plurality of LED light sources (3) is provided which are configured to form a common remote-phosphor light source (12) by arrangement of a common remote-phosphor element (11) downstream of the LED light sources (3), which remote-phosphor element is designed for conversion of the light emitted by the LED light sources (3), wherein the LED light sources (3) are designed to emit light into the remote-phosphor element (11), wherein preferably the LED light sources (3) are arranged on a first carrier (13), and wherein the remote-phosphor element (11) is arranged on a second carrier (14), and wherein holding means (15) are provided, which are designed for releasable connection of the first carrier (13) and second carrier (14).
  12. The illumination module (1) according to claim 11, wherein the primary optics (9) is fixedly connected to the second carrier (14).
  13. A lighting device (10), in particular a filming spotlight, for emitting light directed in parallel, the lighting device comprising a number of illumination modules (1) according to any one of the preceding claims, wherein adjacent illumination modules (1) border one another form-fittingly.
  14. The lighting device (10) according to claim 13, wherein the illumination modules (1) are arranged in the form of a matrix, wherein the matrix has at least n rows and at least m columns, wherein n and m are natural numbers and are at least 1, 2, 3, 4, 5, or at least 10.
  15. The lighting device (10) according to claim 13 or 14, wherein all illumination modules (1) are arranged two-dimensionally within a plane, wherein the main emission direction (x) of the individual illumination modules (1) is the same.
EP18773923.0A 2017-09-21 2018-09-12 Illumination module for emitting light directed in parallel Active EP3685098B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50800/2017A AT520487B1 (en) 2017-09-21 2017-09-21 Light module for the emission of light directed in parallel
PCT/AT2018/060208 WO2019056032A1 (en) 2017-09-21 2018-09-12 Illumination module for emitting light directed in parallel

Publications (2)

Publication Number Publication Date
EP3685098A1 EP3685098A1 (en) 2020-07-29
EP3685098B1 true EP3685098B1 (en) 2021-07-07

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US (1) US10995944B2 (en)
EP (1) EP3685098B1 (en)
AT (1) AT520487B1 (en)
ES (1) ES2892312T3 (en)
WO (1) WO2019056032A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110985947B (en) * 2019-12-30 2020-09-08 广州兰天电子科技有限公司 LED spotlight assembling method

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060124953A1 (en) * 2004-12-14 2006-06-15 Negley Gerald H Semiconductor light emitting device mounting substrates and packages including cavities and cover plates, and methods of packaging same
DE102007028301A1 (en) * 2007-06-20 2007-12-13 Daimlerchrysler Ag Vehicle headlight has housing and semiconductor light source, which is arranged in housing and is thermally connected with heat sink by heat pipe
DE102007050893B4 (en) * 2007-10-24 2011-06-01 Continental Automotive Gmbh Method for positioning and mounting a LED assembly and positioning body therefor
WO2010119580A1 (en) * 2009-04-16 2010-10-21 株式会社光波 Light source module
JP2012226874A (en) * 2011-04-15 2012-11-15 Ccs Inc Reflection type lighting device
KR20130070284A (en) * 2011-12-19 2013-06-27 엘지이노텍 주식회사 Led lighting system
EP2817562A4 (en) * 2012-02-21 2015-10-21 Huizhou Light Engine Ltd Non-glare reflective led lighting apparatus with heat sink mounting
US8567989B2 (en) * 2012-03-16 2013-10-29 Osram Sylvania Inc. Heat sink assembly and light
DE102012020931B4 (en) * 2012-10-25 2022-10-20 Rüdiger Lanz High-performance headlights with high-performance LED bulbs
US20150204520A1 (en) * 2014-01-21 2015-07-23 Dennis Pearson Indirect Dome Light
JP6331814B2 (en) * 2014-07-22 2018-05-30 岩崎電気株式会社 Lighting device

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Publication number Publication date
AT520487B1 (en) 2019-07-15
WO2019056032A1 (en) 2019-03-28
US20200292162A1 (en) 2020-09-17
EP3685098A1 (en) 2020-07-29
US10995944B2 (en) 2021-05-04
AT520487A1 (en) 2019-04-15
ES2892312T3 (en) 2022-02-03

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