Lighting device

Abstract

The invention relates to a lighting device (1), comprising an LED light-generating device (2), which has spatially distributed groups (4) of LEDs for generating light on an emission surface, the generated light radiating from the emission surface of the LED light-generating device (2) through a transparent and resistant protective plate of the LED light-generating device (2); and a replaceable light shaping device (3) which is arranged in front of the transparent protective plate of the LED light generating device (2) and is used for shaping the light emitted by the emitting surface of the LED light generating device (2).

Description

Technical Field

[0001] The invention relates to a lighting device for emitting light having different emission characteristics. Background Art

[0002] Previous lighting systems use various light sources and radiating surfaces for radiating light at a certain semi-scattering angle.

[0003] The lighting device has a light source in order to achieve light effects.

[0004] Light sources have specific radiation characteristics. Light sources are tightly bundled or tightly radiate or they radiate widely. In addition, a distinction can be made between compact light sources with a relatively small radiation surface and extended light sources with a relatively large radiation surface.

[0005] The light effects that can be achieved by a light source result from its emission characteristics, ie the radiation angle of the light source and the size exhibited at the emission opening (aperture).

[0006] The light effect achieved by a light source is called “soft” when the illuminated object is at a relatively small distance from the light source and the light source in question is relatively large. The illuminated object can be so-called surrounded by the light emitted by the light wave.

[0007] When the illuminated object is at a relatively large distance from the light source and the light source in question is relatively small, the light effect achieved by a light source is referred to as “hard.” In the extreme case, this involves a point light source.

[0008] Conventional light sources are known which have a large aperture, wherein however there are a plurality of light sources, in particular LED clusters, which themselves have a small half-scattering angle, i.e. radiate closely. Such light sources are used as spotlights at medium to large distances. Such light sources produce a small light spot, wherein however the light also circulates around the illuminated object at a shorter distance, thus also causing multiple shadows.

[0009] The emission angle indicates the angle at which the light flux emerges from the radiator. Depending on the distance between the light source and the illuminated surface, a light cone with a corresponding diameter is generated. The half-scattering angle is also called the emission angle, half-value angle or opening angle. The half-scattering angle is the most frequently used radiation angle in light technology and is therefore usually also specified by the manufacturer. The half-scattering angle describes the area of ​​radiation that is relevant in terms of measurement and thus defines an abstract boundary that is not perceptible to the human eye. This is the angle between two points at which the light intensity drops to 50 percent of the maximum value. The diameter of the light cone is also given by means of the half-scattering angle.

[0010] In order to provide soft light, LED panel lights are known, in which the emitted light has a relatively large half-scattering angle of, for example, 120 degrees. These conventional LED panel lights have a spatially distributed arrangement of light-emitting diodes, which radiate light through a diffusing cover plate, so that soft uniform light is generated. In order to change the emission characteristics of the light source, it is feasible to provide prismatic plates or the like in order to achieve a smaller half-scattering angle of, for example, 60 degrees. The relatively wide emission angle of conventional LED panel lights can be reduced by means of a combination of prismatic plates in order to achieve a hard light effect. For example, the initial relatively wide half-scattering angle of about 120 degrees can be reduced to about 80 degrees, wherein a light intensity of about 1.5 times the initial lighting device is achieved. However, the energy efficiency (lumens per unit of electrical energy delivered) of the lighting device is significantly reduced thereby.

[0011] Conventional panel lights are also known, which have LED groups distributed in space, in which optical lenses are provided, which bundle the light generated by the LED groups separately. The mixing of the light generated by the LED groups is carried out in the far field. The light emitted by the panel light is relatively tightly bundled and has, for example, a half-scattering angle of 20 degrees. The emitted light can be used as in conventional headlights, that is, to provide a relatively large light intensity at a large spacing. In such conventional panel lights, it is feasible to change the emission characteristics of the light source with the help of accessories. For example, an initially narrow half-scattering angle of, for example, 20 degrees can be expanded to a wide half-scattering angle of about 120 degrees with the help of a diffuser or a so-called soft box. However, in this case, the energy efficiency of the lighting device is significantly reduced. The efficiency is reduced after the initially narrowly bundled light is converted into light with a high scattering angle by providing a light-absorbing diffuser.

[0012] Also known are lighting devices that have a compact LED light source with tightly packed light-emitting diodes having a small radiation surface. With the aid of accessories, it is possible to increase the narrow half-scattering angle, for example by 15 degrees, in order to achieve the desired soft light effect. However, in this case, the energy efficiency is also greatly reduced.

[0013] Furthermore, lighting devices for the illumination of film sets are used in very different ambient environments. In this case, the lighting devices are subject to different environmental influences. These environmental influences include moisture or water on the one hand and dust on the other hand. Furthermore, the lighting devices may be subject to fluctuating temperatures. In particular, when filming outdoors, environmental influences can impair the functional capabilities of the lighting devices. Summary of the invention

[0014] The object of the present invention is to provide a lighting device which allows the emission of light with different emission characteristics without reducing efficiency and which is robust with respect to environmental influences.

[0015] According to the invention, this object is achieved by a lighting device having the features presented in the invention.

[0016] The present invention thus realizes a lighting device, which has an LED light generating device, which has a spatially distributed group of LEDs for generating light on a radiation surface, wherein the generated light is emitted from the radiation surface of the LED light generating device through a transparent and resistant protective plate of the LED light generating device; and has a replaceable light shaping device, which is arranged in front of the transparent protective plate of the LED light generating device and is used to shape the light emitted by the radiation surface of the LED light generating device.

[0017] In a possible embodiment of the lighting device according to the invention, a transparent and resistant protective plate is arranged directly in front of the emission surface of the LED light generating device to protect the LED light generating device from environmental influences, in particular from moisture and / or from dust.

[0018] In a preferred embodiment of the lighting device according to the present invention, the housing of the LED light generating device provided with a transparent protective plate provides protection of IP65 or higher protection level.

[0019] In a preferred embodiment of the lighting device according to the present invention, the housing of the light shaping device also provides protection of IP65 or higher protection level.

[0020] In another possible embodiment of the lighting device according to the present invention, the replaceable light shaping device has a replaceable soft light optical device (Softoptik-Einrichtung), which shapes the light emitted by the radiation surface of the LED light generating device to generate light with a large half scattering angle greater than 90 degrees.

[0021] In one possible embodiment, the replaceable light softening optical device can shape the light emitted by the emission surface of the LED light generating device to generate light with a large half scattering angle greater than 120 degrees.

[0022] In another possible embodiment of the lighting device according to the invention, the replaceable light shaping device has a replaceable spot optical device (Spot Optical Device), which shapes the light emitted by the emission surface of the LED light generating device to generate light with a small half scattering angle of less than 45 degrees.

[0023] In one possible embodiment, the replaceable spot optical device can shape the light emitted by the emission surface of the LED light generating device to generate light with a small half scattering angle of less than 30 degrees.

[0024] In another possible embodiment of the lighting device according to the present invention, the replaceable light shaping device has a replaceable light dome, which shapes the light emitted by the emission surface of the LED light generating device to generate light emitted radially in different directions.

[0025] In another possible embodiment of the lighting device according to the present invention, the replaceable light shaping device has a replaceable light basin, which shapes the light emitted by the emission surface of the LED light generating device to generate light with a soft light effect.

[0026] In another possible embodiment of the lighting device according to the present invention, the LED clusters spatially distributed on the emission surface of the LED light generating device each have a plurality of LEDs or light emitting diodes of different colors, which are closely adjacent to each other on the emission surface of the LED light generating device.

[0027] In another possible embodiment of the lighting device according to the present invention, shielding webs are provided between the LED groups spatially distributed on the emission surface of the LED light generating device, which shield light emitted laterally by the light emitting diodes of the LED group completely or partially.

[0028] In another possible embodiment of the lighting device according to the present invention, the soft light optical device has a cavity with a reflective side wall, and a diffuser is fixedly or replaceably arranged on the cavity to generate light with a soft light effect.

[0029] In another possible embodiment of the lighting device according to the invention, the spot optics has a two-dimensional field of replaceable or fixedly arranged optical multi-lens systems arranged next to one another, which are each arranged above a corresponding LED group of the light generating device.

[0030] In another possible embodiment of the lighting device according to the invention, the two-dimensional field of the optical multi-lens system has a first number N of rows and a second number M of columns.

[0031] In another possible embodiment of the lighting device according to the invention, different optical multi-lens systems within the two-dimensional field of the point optics are addressable by a control device of the lighting device according to the row number i and according to the column number j.

[0032] In another possible embodiment of the lighting device according to the present invention, each optical multi-lens system within the two-dimensional field of the point optical device has a width B along the x-direction, a length L along the y-direction and a height H along the z-direction, wherein the surfaces oriented along the x-direction and the y-direction are oriented parallel to the radiation surface of the LED light generating device.

[0033] In another possible embodiment of the lighting device according to the invention, the optical multi-lens systems within the two-dimensional field of view of the point optics have the same or different heights H.

[0034] In another possible embodiment of the lighting device according to the invention, each optical multi-lens system of the point optical device has a plurality of optical components, in particular optical lenses, arranged one above the other and separated from the optical multi-lens systems of the adjacent point optical device by the scattered light delimiting parts of the corresponding optical multi-lens system.

[0035] In another possible embodiment of the lighting device according to the invention, the optical multi-lens system of the spot optics has a first optical system which focuses the light emitted by the corresponding group of light-emitting diodes of the light generating device and deflects it in a subsequent second optical system.

[0036] In one possible embodiment, the first optical component of the optical multi-lens system has a collimator lens which intercepts and bundles the light emitted by the corresponding group of light-emitting diodes of the light generating device.

[0037] In another possible embodiment of the lighting device according to the invention, the optical multi-lens system of the point optical device has a second optical device arranged above the first optical device, which mixes the light emitted by different light-emitting diodes of the LED group and focused by the first optical device of the optical multi-lens system for color homogenization.

[0038] In one possible embodiment, the secondary optical system of the optical multi-lens system has a condenser lens, in particular a so-called honeycomb condenser or fly-eye condenser, which is designed as a component for color homogenization.

[0039] In one possible embodiment, the secondary optics of the optical multi-lens system has a diffuser plate, in particular a plate with a randomly distributed or defined structure.

[0040] In another possible embodiment of the lighting device according to the invention, the optical multi-lens system of the spot optical device has a third optical device arranged above the second optical device, which radiates the light color-mixed by the second optical device with a predetermined light intensity distribution and at a small half-scattering angle.

[0041] In one possible embodiment, the third optical component of the optical multi-lens system has a Fresnel lens.

[0042] In another possible embodiment, the third optical element of the optical multi-lens system has a converging lens, a diverging lens, a prismatic plate or a diffuser plate.

[0043] In another possible embodiment of the lighting device according to the invention, the distance between the third optical element and the second optical element of the optical multi-lens system of the point optics is automatically or manually adjustable in order to change the half-scattering angle of the corresponding optical multi-lens system.

[0044] In another possible embodiment of the lighting device according to the invention, the distance between the third optical element and the second optical element of the optical multi-lens system can be set by means of an associated controllable actuator.

[0045] In a possible embodiment of the lighting device according to the invention, the actuator is a servo motor.

[0046] In an alternative possible embodiment of the lighting device according to the invention, the actuator is a piezoelectric drive.

[0047] In another alternative possible embodiment of the lighting device according to the invention, the actuator is a hydraulic drive.

[0048] In another possible embodiment of the lighting device according to the present invention, a controllable actuator of the optical multi-lens system can be addressed by a control device with the aid of a row number i of the optical multi-lens system within the two-dimensional field of the point optical device and with the aid of a column number j and a set value can be obtained by the control device for setting the spacing between a third optical device and a second optical device of the optical multi-lens system.

[0049] In another possible embodiment of the lighting device according to the invention, the ratio between the half-scattering angle of the light emitted by the optical multi-lens system of the spot device and the half-scattering angle of the light emitted by the soft optics is approximately one to four.

[0050] In another possible embodiment of the lighting device according to the invention, the half scattering angle of the light emitted by the optical multi-lens system of the spot optics can be set in a range between 10 degrees and 30 degrees.

[0051] In another possible embodiment of the lighting device according to the invention, different groups of light emitting diodes of the LED light generating device can be controlled independently of one another by the first control device in order to set the brightness and / or color of the light generated by the corresponding group of LEDs.

[0052] In a possible embodiment of the lighting device according to the present invention, the first control device is integrated on the LED light generating device.

[0053] In another possible embodiment of the lighting device according to the invention, actuators of different optical multi-lens systems of the spot optics can be controlled independently of one another by a second control device in order to set a half-scattering angle of light emitted by the corresponding optical multi-lens system of the spot optics.

[0054] In another possible embodiment of the lighting device according to the present invention, the second control device is integrated into the spot optics.

[0055] In another possible embodiment of the lighting device according to the invention, the emission direction of the light emitted by the optical multi-lens system of the point optics can be set by a third control device.

[0056] In another possible embodiment of the lighting device according to the present invention, the third control device is integrated into the spot optics.

[0057] In another possible embodiment of the lighting device according to the invention, the optical multi-lens system of the spot optics has a protective plate for protecting the respective optical multi-lens system on the entrance side facing the associated group of light-emitting diodes and / or on the exit side.

[0058] In another possible embodiment of the lighting device according to the present invention, a plurality of replaceable light shaping devices are arranged stacked one above the other in front of a transparent and resistant protective plate of the LED light generating device for shaping the light emitted by the lighting device.

[0059] In another possible embodiment of the lighting device according to the invention, the two-dimensional field of the optical multi-lens system of the point optics has six (N=6) rows and twelve (M=12) columns.

[0060] In another possible embodiment of the lighting device according to the invention, the two-dimensional field of optical multi-lens systems of the point optics has in each case three by three groups of optical multi-lens systems.

[0061] Further, possible implementations of the lighting device according to the present invention are described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] The accompanying drawings show:

[0063] Figure 1 A schematic block diagram showing a possible implementation of the lighting device according to the present invention;

[0064] Figure 2 A possible embodiment of the lighting device according to the present invention is shown;

[0065] Figure 3 One possible embodiment of a multi-lens system arranged within a point optical device is shown;

[0066] Figure 4A , Figure 4B An embodiment of a soft light optical device is shown together with the associated light distribution curve;

[0067] Figure 5A , Figure 5B An exemplary embodiment of a spot optics system is shown together with the associated light distribution curve. DETAILED DESCRIPTION

[0068] Figure 1 An embodiment of a lighting device 1 according to the present invention is schematically shown. The lighting device 1 has an LED light generating device 2 and a replaceable light shaping device 3. The LED light generating device 2 has a spatially distributed group of LEDs or similar light-emitting elements for generating light on the emission surface. The generated light is emitted from the emission surface of the LED light generating device 2 through a transparent and resistant protective plate of the LED light generating device 2. The transparent and resistant protective plate for protecting the LED light generating device 2 from environmental influences is preferably arranged directly in front of the emission surface of the LED light generating device 2. The transparent and resistant protective plate is used to protect the LED light generating device 2 from environmental influences, in particular from moisture and / or from dust and / or from temperature fluctuations. The sealed housing of the LED light generating device 2 provided with the transparent protective plate provides protection of IP65 or higher protection level (Ingress Protection). Therefore, the LED light generating device 2 is not only waterproof but also dustproof. As protection from the surrounding environment and as an optical interface, the protective plate is preferably located directly in front of the light-emitting diodes of the LED light generating device 2. The LED light generating device 2 has mechanical connection elements which enable different light shaping devices 3 to be replaceably arranged in front of the protective plate of the LED light generating device 2. These mechanical connection elements include, for example, guide pins and sleeves as well as quick-release closures and the like.

[0069] exist Figure 1 In one possible embodiment, the replaceable light shaping device 3 shown in FIG. 1 has a replaceable soft light optical device, which shapes the light emitted by the emission surface of the LED light generating device 2 to generate light with a large half-scattering angle greater than 90 degrees. For example, the replaceable light shaping device 3 can be used as a soft light optical device to shape light with a large half-scattering angle greater than 120 degrees to achieve a soft light effect.

[0070] In addition, the replaceable light shaping device 3 may have a replaceable spot optical device in one possible embodiment, which shapes the light emitted by the emission surface of the LED light generating device 2 to generate light with a small half scattering angle of less than 45 degrees. For example, the replaceable spot optical device can shape light with a small half scattering angle of less than 30 degrees to achieve a hard light effect.

[0071] It is also possible that the replaceable light shaping device 3 has a replaceable light dome or dome. The replaceable light dome reshapes the light emitted by the emission surface of the LED light generating device 2 to generate light radiated radially in different directions, so that a soft light effect can be achieved.

[0072] In another possible embodiment, the replaceable light shaping device 3 has a replaceable light basin, which shapes the light emitted by the emission surface of the LED light generating device 2 to generate light with a soft light effect. The replaceable light basin is also called a softbox.

[0073] The light groups arranged spatially distributed by the emission surface of the LED light generating device 2 preferably each have a plurality of light emitting diodes of different colors, which are closely adjacent to each other on the emission surface of the LED light generating device 2. Shielding webs or similar structures are preferably provided between the LED groups 4 arranged spatially distributed on the emission surface of the LED light generating device 2, which shield or block the light emitted laterally completely or at least partially. In addition, these structures can also be designed to change the light emitted laterally by the LEDs of the LED group 4.

[0074] In one possible embodiment, the replaceable light shaping device 3 has a soft light optical device with a cavity. The soft light optical device has a cavity with reflective side walls, at which a diffuser is fixedly or replaceably arranged to produce light with a soft light effect. For example, a so-called white box can be provided, which has a cavity with white reflective walls and a diffuser can be arranged at the cavity. Here, the cavity and the diffuser are preferably coordinated in terms of their structural depth and in terms of their reflection and transmission properties so that the light of the LED is completely mixed and a uniformly luminous surface with a large radiation angle is produced. Different light effects can be achieved or set by using different diffusers.

[0075] The light shaping device 3 of the lighting device 1 is as follows Figure 1As shown in , in one possible embodiment, a point optical device is included. The point optical device preferably has a two-dimensional field of replaceable or fixedly mounted optical multi-lens systems 9 arranged side by side, each of which is directly above the corresponding LED group 4 of the light generating device 2. The two-dimensional field of the optical multi-lens systems 9 has a first number N of rows and a second number M of columns. The different optical multi-lens systems 9 within the two-dimensional field of the point optical device are preferably addressed by a control device of the lighting device 1 according to the row number i and according to the column number j. Within the two-dimensional field of the point optical device, each optical multi-lens system 9 of the point optical device has a width B in the x-direction, a length L in the y-direction and a height H in the z-direction. Here, the surfaces oriented in the x-direction and in the y-direction are oriented parallel to the radiation surface of the LED light generating device 2. The optical multi-lens systems 9 within the two-dimensional field of the point optical device have the same or different heights H. Each optical multi-lens system 9 of the point optical device preferably has a plurality of optical lenses arranged one above the other, as also shown in Figure 3 As shown in .

[0076] Figure 2 An embodiment of a lighting device 1 according to the invention is shown with LED light generating means 2 and replaceable light shaping means 3A, 3B. Figure 2 In the embodiment shown in , the two replaceable light shaping devices 3A, 3B have replaceable soft light optics 3A on one side and replaceable spot optics 3B on the other side. The LED light generating device 2 has spatially distributed LED groups or LED clusters 4 on the radiation surface for generating light. The light emitting diodes are arranged in spatially distributed groups and can form a relatively large radiation surface as a whole. For example, the LED light generating device 2 has 72 LED groups 4 on a radiation surface of, for example, 60 cm×30 cm. The LED groups 4 are preferably configured so that light emitting diodes of different colors are as close to each other as possible in a group 4.

[0077] In order to protect the LED light generating device 2 from environmental influences, a transparent and resistant protective plate is preferably located directly in front of the light-emitting diode groups 4 distributed on the emission surface. The protective plate provides protection from environmental influences, in particular from moisture, from return strokes or from temperature fluctuations. The transparent and resistant protective plate preferably provides protection to a protection class of IP65 or higher. Shielding webs are preferably provided between the LED groups 4 spatially distributed on the emission surface of the LED light generating device 2, which shield the light emitted laterally by the light-emitting diodes of the LED group 4 completely or partially or otherwise change it. The LED light generating device 2 has a mechanical interface for accommodating a replaceable light shaping device 3.

[0078] The light shaping device 3, in particular two Figure 2 The replaceable light shaping devices 3A, 3B shown in the figure preferably also have an IP65 or higher protection level (Ingress Protection). This makes it possible to use the lamp and its accessories in external operation without restriction.

[0079] The replaceable light shaping device 3 may be, for example, a soft light optical device 3A or a spot optical device 3B, as in Figure 2 As shown in FIG. 3 , the replaceable soft light optical device 3A reshapes the light emitted by the radiating surface of the LED light generating device 2 to generate light with a large half scattering angle of at least 90 degrees, so that a soft light effect can be achieved. The replaceable spot optical device 3B reshapes the light emitted by the radiating surface of the LED light generating device 2 to generate light with a small half scattering angle of less than 45 degrees, so that a hard light effect can be achieved.

[0080] Except in Figure 2 In addition to the soft light optical device 3A and the spot optical device 3B shown in the figure, other replaceable light shaping devices 3 can also be arranged at the light generating device 2. These replaceable light shaping devices 3 are, for example, replaceable light domes (domes) or also replaceable light basins (soft boxes).

[0081] Figure 4A , 4B An exemplary embodiment of a soft-light optics 3A is shown together with an associated light distribution curve LVK. The soft-light optics 3A provides a homogeneous luminous surface which generates soft light with a large half-scattering angle.

[0082] Figure 5A , 5B An exemplary embodiment of a spot optics 3B is shown together with an associated light distribution curve LVK. The soft light optics 3B provide a tightly focused emission of light with a relatively small half-scattering angle.

[0083] The lighting device 1 according to the invention allows, by replacing the light shaping device 3, to change the emission characteristic without reducing the energy efficiency or the light quality, so that the emission characteristic corresponds to the emission characteristic according to Figure 4B or according to Figure 5BLight distribution curve LVK. It is also feasible that different soft light optical devices 3A with different light distribution curves are designed to generate light with different wide half-scattering angles. For example, a first soft light optical device 3A generates light with a wide half-scattering angle greater than 80 degrees and another replaceable soft light optical device 3A generates light with a large half-scattering angle greater than 100 degrees, so as to achieve a soft light effect. For example, different soft light optical devices 3B may also be provided, which generate light with a small half-scattering angle. For example, a first point optical device 3B can generate light with a small half-scattering angle of less than 45 degrees and another point optical device 3B even generates light with an even smaller half-scattering angle of less than 15 degrees, so that a hard light effect can be achieved.

[0084] In one possible embodiment, different light shaping devices 3 can be manually replaceable by means of mechanical connecting elements in front of the protective plate of the LED light generating device 2. For example, the replaceable light shaping devices 3A, 3B each have a frame element 5, which has a mechanical connecting element 6, which allows the corresponding light shaping device 3 to be placed on the LED light generating device 2.

[0085] exist Figure 2 In the embodiment shown in FIG. 1 , the soft light optical device 3A has a cavity with a reflective side wall 7, at which a diffuser plate 8 is fixedly or replaceably arranged for generating light with a soft light effect. The mechanical connection element 6 of the soft light optical device 3A allows the soft light optical device to be placed on the front side of the LED light generating device 2 and mechanically arranged by means of the mechanical connection element 6, for example a clamping element.

[0086] exist Figure 2 The spot optical device 3B shown in FIG. 1 can also be placed on the front side of the LED light generating device 2 by means of corresponding mechanical connecting elements 6 and mechanically mounted there. Figure 2As shown in FIG. 1 , the spot optical device 3B has a two-dimensional field of optical multi-lens systems 9 placed side by side, which are respectively arranged above the corresponding LED groups 4 of the LED light generating device 2. The two-dimensional field of the optical multi-lens system 9 has a first number of N=6 rows and M=12 columns. In addition, the two-dimensional field of the optical multi-lens system 9 of the spot optical device 3B can contain three by three groups of optical multi-lens systems 9, which can be controlled independently of each other. The optical multi-lens system 9 can be arranged replaceably in the spot optical device 3B in a possible embodiment. Alternatively, the spot optical device 3B includes a fixedly mounted optical multi-lens system 9, for example a six by twelve multi-lens system 9. In a possible embodiment, different optical multi-lens systems 9 within the two-dimensional field of the spot optical device 3B can be addressed and controlled by the control device of the lighting device 1 according to their row number i and according to their column number j. In a possible embodiment, all multi-lens systems 9 of the spot optical device 3B can be set or controlled independently of each other. Each optical multi-lens system 9 within the two-dimensional field of view of the point optical device 3B, such as Figure 2 As shown in , it has a width B along the x-direction, a length L along the y-direction, and a height H along the z-direction.

[0087] Figure 3 Shown in Figure 2 1 shows a possible embodiment of an optical multi-lens system 9 within a point optical device 3B. The optical multi-lens system 9 of the point optical device 3B has a plurality of optical components 9B, 9C, 9D arranged one above the other. These optical components are, for example, optical lenses. These optical components are preferably separated from the optical multi-lens system of the adjacent point optical device 3B by the associated scattered light delimiting portion 9A of the corresponding optical multi-lens system 9. The optical multi-lens system 9, as shown in FIG. Figure 3As shown in the figure, there is a first optical device 9B, which is formed by a collimating lens 9B, for example. The first optical device 9B collects the light emitted by the corresponding LED cluster 4 of the light generating device 2 and redirects the light to the subsequent second optical device 9C. The first optical device 9B intercepts as much as possible the light of the corresponding LED cluster 4 and collects or bundles the light. The optical multi-lens system 9 also has a second optical device 9C arranged above the first optical device 9B, the first optical device is configured as a collimating lens 9B, for example, and the second optical device 9C is configured as a condenser lens 9C, for example. The second optical device 9C, in particular the condenser lens 9C, mixes the light emitted by different light-emitting diodes of the LED group 4 and collected or bundled by the second optical device 9B, in particular the collimating lens 9B. The second optical device 9C is, for example, a fly-eye honeycomb concentrator, which fully mixes the light of different light-emitting diodes by means of facets. The optical multi-lens system 9 of the point optical device 3B also preferably has a third optical device 9D arranged above the second optical device 9C. In one possible embodiment, the third optical device 9D is formed by a Fresnel lens 9D. The Fresnel lens 9D may have a specific scattering structure on its back side, which is connected to the condenser to ensure good color mixing and uniform spatial light distribution. The third optical device 9D radiates the light mixed by the second optical device 9C with a preset light intensity distribution as light with a small half scattering angle for achieving a hard light effect. For example, the third optical device 9D radiates color-mixed light with a defined light intensity distribution and a narrow half scattering angle of, for example, about 10 degrees into the far field. The third optical device 9D can also be implemented by an optical device different from a Fresnel lens. For example, the third optical device 9D is formed by a converging lens, a diverging lens, a diffuser, or a prismatic sheet.

[0088] The different optical components 9B, 9C, 9D of the optical multi-lens system 9 are preferably separated by means of a scattered light delimitation 9A, which prevents light from the multi-lens optical unit 9 from entering the multi-lens optical unit 9 of the spot optical device 3B placed next to it and thus undesirably expanding the radiation angle. In a possible embodiment, the optical multi-lens system 9 of the spot optical device 3B is located at the entrance side facing the corresponding LED cluster 4, i.e., at Figure 3 In the lower part, and / or at the exit side, i.e. at Figure 3In the top, there is an additional protective plate for protecting the corresponding optical multi-lens system 9 from environmental influences. The two protective plates arranged at the top and bottom and the modified scattered light delimiting part 9A preferably form a closed housing of the multi-lens system module 9. In a possible embodiment, the multi-lens system module 9 can be replaced at the point optical device 3B. For example, a point optical device 3B with six rows and twelve columns has 72 multi-lens optical modules 9 that can be replaced independently of each other. In a possible embodiment, the multi-lens system module 9 has a width B in the x-direction, a length L in the y-direction and a height H in the z-direction. This makes it possible that different optical multi-lens systems 9 can have different heights H in order to achieve specific light effects. The provision of replaceable multi-lens modules 9 allows the user to individually design the point optical device 3B for the corresponding application.

[0089] In a possible embodiment of the lighting device 1 according to the present invention, the distance between the third optical device 9D and the second optical device 9C of the optical multi-lens system 9 of the point optical device 3B can be automatically or manually set to change the corresponding half-scattering angle of the corresponding optical multi-lens system 9. In a preferred embodiment, the distance between the third optical device 9D and the second optical device 9C of the optical multi-lens system 9 is set by means of an associated controllable actuator. The actuator is, for example, a servomotor, a piezoelectric drive or a hydraulic drive element. In a possible embodiment, the actuator is integrated in the optical multi-lens system module 9 and controlled via a local interface of the multi-lens system module 9.

[0090] The controllable actuators are preferably addressable within the two-dimensional field of the spot optical device 3B by the control device, for example by means of an address, which includes a row number and a column number within the two-dimensional field. In addition, the set value for setting the spacing between the third optical device 9D and the second optical device 9C of the optical multi-lens system 9 can be set by the control device for controlling the corresponding actuators.

[0091] The actuators of the different optical multi-lens systems 9 of the spot optical device 3B are preferably controlled independently of each other by a control device for setting the half-scattering angle of the light emitted by the corresponding optical multi-lens system 9 of the spot optical device 3B. The control device can be integrated in the spot optical device 3B. In addition, the radiation angle of the light beam emitted by the optical multi-lens system 9 of the spot optical device 3B can be set by another control device. The control device can also be integrated in the housing of the spot optical device 3B. With the help of the actuator, it is possible to set a zoom optical mechanism, which has a variable radiation angle for each optical multi-lens system 9 within the spot optical device 3B. The spot optical device 3B is constructed so that it contains as similar components as possible over a large range of radiation angles, for example, 10 degrees to 30 degrees. For example, the collimator lens 9B, the second optical device 9C and the third optical device 9D can be used in a 10-degree optical device and also in a 20-degree optical device. The larger radiation angle is obtained here by the smaller distance between the third optical device 9D, for example, the Fresnel lens 9D and other components.

[0092] In order to produce a specific light effect or light effect, it is possible to provide individual LED clusters or LED groups 4 of the light generating device 2 with different spot optics and / or with the following spot optics in which different half-scattering angles can be set. Therefore, when the brightness and color of the LED groups 4 of the light generating device 2 can be set electronically, multiple possibilities for producing special light effects and color effects by means of a matrix light are obtained, wherein individual areas of the light field can be faded in or out. It is also possible to use optical devices in a possible embodiment, which allow the radiation direction to be changed within a certain angle range, such as adjustable prismatic plates, piezoelectrically movable micro-optics, etc. It is therefore possible that the lighting device 1 is also used to illuminate different and optionally also movable objects. In a possible embodiment, the radiation direction of the light emitted by the optical multi-lens system 9 of the spot optical device 3B can be set by a control device. The control device can be integrated in the spot optical device 3B.

[0093] In a possible embodiment of the lighting device 1 according to the present invention, different control devices can communicate with each other via a control bus and a data bus. For this purpose, in addition to the mechanical interface, a control interface and a data interface are provided between the LED light generating device 2 and the light shaping device 3. For example, the LED light generating device 2 has a control unit with a microprocessor or a controller as a basic element, and the microprocessor or the controller controls different controllable elements in the light shaping device 3 via a data interface and a control interface. For example, the control unit can control the actuator of the multi-lens system 9 of the spot optical device 3B at the light generating device 2 via the control interface and the data interface. In a possible embodiment, different controllable optical multi-lens systems 9 can be addressed according to their column number and row number within the two-dimensional field of the spot optical device 3B, and the corresponding control signals or set values ​​can be obtained by the control unit of the lighting device 1. In a possible embodiment, the control unit of the lighting device 1 can also control different LED groups 4 of the LED light generating device 2. For example, a specific LED group 4 or a specific LED cluster is turned on so that it radiates light strongly through the corresponding single optical mechanism or optical multi-lens system 9 arranged thereon. In this case, the control device of the lighting device 1 simultaneously controls the actuators of the associated optical multi-lens system 9 in order to adjust the radiation angle, for example.

[0094] This can take place independently of one another for a plurality of different optical multi-lens systems 9 and the associated LED clusters 4 arranged thereunder. In this way, a very large number of different light effects can be realized.

[0095] In another possible embodiment, the soft light optical device 3A may also have a control unit, which can be connected to the control bus and data bus of the light generating device 2 via a control interface and a data interface. For example, in one possible embodiment, the control unit of the soft light optical mechanism 3A can set the transparency of the diffuser 8 in relation to the control signal. Other embodiments of the lighting device 1 according to the present invention are feasible. In one possible embodiment, a plurality of replaceable light shaping devices 3 can be stacked up and down in front of the transparent and resistant protective plate of the LED light generating device 2 to shape the light emitted by the lighting device 1.

[0096] In another possible embodiment of the lighting device 1 according to the present invention, the control device of the lighting device 1 is connected to the bus of the central control device of the lighting system via the device interface, for controlling the controllable components of the light generating device 2 and for controlling the controllable components of the light shaping device 3. For example, the control device integrated in the lighting device 1 has a DMX interface for connecting to the central control console of the lighting system. This allows the control device of the lighting device 1 to communicate with the central control device of the lighting facility in accordance with the communication protocol. For example, different optical multi-lens systems 9 can be set as independently controllable elements of the spot optical device 3B via different DMX channels.

[0097] Other embodiments of the lighting device 1 according to the present invention are possible. In one possible embodiment, the control device of the lighting device 1 identifies the type of the light shaping device 3 placed in front of the protective plate. For example, the control unit locally integrated in the light shaping device 3 communicates with the control device integrated in the LED light generating device 2 of the lighting device 1 and transmits certain parameters. For example, the control device of the lighting device 1 can identify whether the replaceable light shaping device 3 placed is a soft light optical device 3A or a spot optical device 3B.

[0098] In another possible embodiment of the lighting device according to the invention, the LED light generating device 2 has a user interface for inputting specific parameters or values. For example, the user can be informed via the user interface of the control device of the lighting device 1 whether the light shaping device 3 manually placed at the front side is a soft light optical device 3A or a point optical device 3B. The type of the soft light optical device 3A and the type of the point optical device 3B can also be input via the user interface. For example, the user inputs via the user interface of the LED light generating device 2 that the installed light shaping device 3 is a point optical device 3B, which includes six times twelve multi-lens systems 9. In this case, the control device of the LED light generating device 2 can, for example, activate all 72 corresponding LED clusters 4 for generating light. However, if the placed point optical device 3B has a small number of optical multi-lens systems 9, the control device of the light generating device 2 can, for example, activate a correspondingly smaller number of LED clusters 4. Energy efficiency is thereby additionally improved.

[0099] Other embodiments of the lighting device 1 according to the present invention are possible. For example, the replaceable light shaping device 3 can be folded in front of the protective plate of the LED light generating device 2 by means of a folding mechanism and fixed there. For example, in one possible embodiment, there is a foldable soft light optical device 3A at one side of the LED light generating device 2 and a foldable spot optical device 3B at the other opposite side of the LED light generating device 2. Alternatively, it is possible that the soft light optical device 3A and / or the spot optical device 3B are mechanically released from the LED light generating device 2 and replaced by another light shaping device 3.

[0100] There are other implementation possibilities of the lighting device 1 according to the present invention. For example, in one possible embodiment, the lighting device 1 may have a graphical user interface GUI, which displays, for example, a momentary light distribution curve LVK provided by the replaceable light shaping device 3 that has been installed at the moment. The light distribution curve LVK of the light shaping device 3 may be stored in a local memory of the light shaping device 3 and, after the light shaping device 3 is placed and installed, transmitted to the graphical user interface GUI of the lighting device 1 via a data interface and a local data bus of the LED light generating device 2 and displayed there for the user.

[0101] The lighting device 1 according to the invention is characterized by a high flexibility for realizing a wide range of different light effects, wherein at the same time the energy efficiency is not reduced. Furthermore, the lighting device 1 according to the invention is extremely resistant with respect to environmental influences.

Claims

1. A lighting device (1), comprising: LED light generating device (2), said LED light generating device having a spatially distributed group (4) of LEDs for generating light on a radiation surface, wherein the generated light is emitted from the radiation surface of the LED light generating device (2) through a transparent and resistant protective plate of the LED light generating device (2); and having A replaceable light shaping device (3) is arranged in front of a transparent protective plate of the LED light generating device (2) and is used to shape the light emitted by the emitting surface of the LED light generating device (2).

2. The lighting device according to claim 1, The transparent and resistant protective plate is arranged in front of the radiation surface of the LED light generating device (2) to protect the LED light generating device (2) from environmental influences, in particular from moisture and / or from dust, wherein the housing of the LED light generating device (2) provided with the transparent protective plate provides protection of IP65 or higher protection level.

3. The lighting device according to claim 1 or 2, The replaceable light shaping device (2) has a replaceable soft light optical device (3A), which shapes the light emitted by the radiating surface of the LED light generating device (2) to generate light with a large half scattering angle greater than 90 degrees, especially greater than 120 degrees.

4. The lighting device according to claim 1 or 2, The replaceable light shaping device (3) has a replaceable spot optical device (3B), which shapes the light emitted by the radiation surface of the LED light generating device (2) to generate light with a small half scattering angle of less than 45 degrees, especially less than 30 degrees.

5. The lighting device according to claim 1 or 2, The replaceable light shaping device (3) has a replaceable light dome, which shapes the light emitted by the radiating surface of the LED light generating device (2) to generate light radiated radially in different directions with a soft light effect.

6. The lighting device according to claim 1 or 2, The replaceable light shaping device (3) has a replaceable light basin, which shapes the light emitted by the emitting surface of the LED light generating device (2) to generate light with a soft light effect.

7. The lighting device according to any one of claims 1 to 6, The groups (4) of LEDs spatially distributed on the emission surface of the LED light generating device (2) each comprise a plurality of LEDs of different colors, the LEDs being closely adjacent to one another on the emission surface of the LED light generating device (2).

8. The lighting device according to claim 7, Shielding webs are provided between the LED groups (4) spatially distributed on the emission surface of the LED light generating device (2), and the shielding webs completely or partially shield the light laterally emitted by the LEDs of the LED group (4).

9. The lighting device according to claim 3, The soft light optical device (3A) has a cavity with a side wall having a reflective effect, and a diffusion plate (8) is fixedly or replaceably arranged in the cavity for generating light with a soft light effect.

10. The lighting device according to claim 4, The spot optical device (3A) has a two-dimensional field of replaceable or fixed optical multi-lens systems (9) placed side by side, which are respectively arranged above the corresponding LED groups (4) of the light generating device (2).

11. The lighting device according to claim 10, The two-dimensional field of the optical multi-lens system (9) has a first number N of rows and a second number M of columns.

12. The lighting device according to claim 11, Different optical multi-lens systems (9) within the two-dimensional field of the point optical device (3A) can be addressed by a control device according to the row number i and according to the column number j.

13. The lighting device according to claim 11 or 12, Each optical multi-lens system (9) within the two-dimensional field of the point optical device (3B) has a width B along the x-direction, a length L along the y-direction and a height H along the z-direction, wherein the surfaces oriented along the x-direction and along the y-direction are oriented parallel to the radiation surface of the LED light generating device.

14. The lighting device according to claim 13, The optical multi-lens system (9) within the two-dimensional field of view of the point optical device (3B) has the same or different heights H.

15. The lighting device according to claims 10 to 14, Each optical multi-lens system (9) of the point optical device (3B) has a plurality of optical components (9B, 9C, 9D) arranged one above the other and are separated from the optical multi-lens system (9) of the adjacent point optical device (3B) by the associated scattered light delimiting portion (9A) of the corresponding optical multi-lens system (9).

16. The lighting device according to claims 10 to 15, The optical multi-lens system (9) of the spot optical device (3B) has a first optical device (9B), in particular a collimating lens, which focuses the light emitted by the corresponding group (4) of LEDs of the light generating device (2).

17. The lighting device according to claim 16, The optical multi-lens system (9) of the point optical device (3B) has a second optical device (9C) arranged above the first optical device (9B), in particular a condenser lens, which mixes the light emitted by the LEDs of different colors of the LED group (4) and concentrated by the first optical device (9B).

18. The lighting device according to claim 17, The optical multi-lens system (9) of the point optical device (3B) has a third optical device (9D) arranged above the second optical device (9C), in particular a Fresnel lens, which radiates the light mixed in color by the second optical device (9C) as light with a small half-scattering angle with a preset light intensity distribution.

19. The lighting device according to claim 18, The distance between the third optical device and the second optical device (9C) of the optical multi-lens system (9) of the point optical device (3B) can be automatically or manually set to change the half-scattering angle of the corresponding optical multi-lens system (9).

20. The lighting device according to claim 19, The distance between the third optical element (9D) and the second optical element (9C) of the optical multi-lens system (9) can be set by means of an associated controllable actuator, in particular a servomotor, a piezoelectric drive or a hydraulic drive.

21. The lighting device according to claim 20, The actuator of the optical multi-lens system (9) can be addressed by a control device with the help of the row number i and the column number j of the optical multi-lens system (9) within the two-dimensional field of the point optical device (3B), and a setting value is obtained by the control device for setting the distance between the third optical device (9D) and the second optical device (9C) of the optical multi-lens system (9).

22. The lighting device according to any one of claims 10 to 21, The ratio between the half scattering angle of the hard light emitted by the optical multi-lens system (9) of the spot device (3B) and the half scattering angle of the soft light emitted by the soft light optical mechanism (3A) is approximately one to four.

23. The lighting device according to any one of claims 10 to 22, The half-scattering angle of the hard light emitted by the optical multi-lens system (9) of the spot optical device (3B) can be set in a range between 10 degrees and 30 degrees.

24. The lighting device according to any one of claims 1 to 23, Different LED groups (4) of the LED light generating device (2) can be controlled independently of each other by a first control device, so as to set the brightness and / or color of the light generated by the corresponding LED group (4).

25. The lighting device according to claim 24, The first control device is integrated into the LED light generating device (2).

26. The lighting device according to any one of claims 21 to 25, The actuators of different optical multi-lens systems (9) of the spot optical device (3B) can be controlled independently of each other by a second control device to set the half-scattering angle of light emitted by the corresponding optical multi-lens system (9) of the spot optical device (3B).

27. The lighting device according to claim 26, The second control device is integrated into the spot optical device (3B).

28. A lighting device according to claims 10 to 27, The emission direction of the light emitted by the optical multi-lens system (9) of the point optical device (3B) can be set by a third control device.

29. The lighting device according to claim 28, The third control device is integrated into the spot optical device (3B).

30. The lighting device according to any one of claims 10 to 29, The optical multi-lens system (9) of the spot optics has a protective plate for protecting the optical multi-lens system (9) on the entrance side facing the associated LED group (4) and / or on the exit side.

31. The lighting device according to any one of claims 1 to 30, A plurality of replaceable light shaping devices (3) are arranged in a stacked manner on top of each other in front of the transparent and resistant protective plate of the LED light generating device (2) for shaping the light emitted by the lighting device (1), wherein each replaceable light shaping device (3) provides protection of IP65 or higher level.

32. The lighting device according to any one of claims 11 to 31, The two-dimensional field of view of the optical multi-lens system (9) of the point optical device (3B) has six (N=6) rows and twelve (M=12) columns.

33. The lighting device according to claim 32, The two-dimensional field of the optical multi-lens system (9) of the point optical device (3B) has in each case three by three groups of the optical multi-lens system.

34. A point optical device (3B) for use according to any one of claims 1 to 33, having a two-dimensional field at an optical multi-lens system (9), wherein each optical multi-lens system (9) of the point optical device (3B) has a plurality of optical devices (9B, 9C, 9D) arranged one above the other and overlapping each other, the optical devices being separated from the optical multi-lens system (9) of the adjacent point optical device (3B) by the corresponding scattered light limiting portion (9A) of the corresponding optical multi-lens system (9).

35. The spot optical device according to claim 34, The optical multi-lens systems (9) of the point optical device (3B) each have a zoom device, and the zoom device has at least one actuator for setting the distance between the optical components (9B, 9C, 9D) of the optical multi-lens system (9).

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