EP1649212B1 - Ambient lighting system - Google Patents

Ambient lighting system Download PDF

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Publication number
EP1649212B1
EP1649212B1 EP04737368A EP04737368A EP1649212B1 EP 1649212 B1 EP1649212 B1 EP 1649212B1 EP 04737368 A EP04737368 A EP 04737368A EP 04737368 A EP04737368 A EP 04737368A EP 1649212 B1 EP1649212 B1 EP 1649212B1
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EP
European Patent Office
Prior art keywords
lighting system
characterised
room lighting
system according
refractive
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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EP04737368A
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German (de)
French (fr)
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EP1649212A1 (en
Inventor
Johannes Jungel-Schmid
Dimitre Tochev
Ivan Tochev
Original Assignee
Johannes Jungel-Schmid
Dimitre Tochev
Ivan Tochev
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Publication date
Priority to AT11792003 priority Critical
Application filed by Johannes Jungel-Schmid, Dimitre Tochev, Ivan Tochev filed Critical Johannes Jungel-Schmid
Priority to PCT/AT2004/000238 priority patent/WO2005010433A1/en
Publication of EP1649212A1 publication Critical patent/EP1649212A1/en
Application granted granted Critical
Publication of EP1649212B1 publication Critical patent/EP1649212B1/en
Application status is Expired - Fee Related legal-status Critical
Anticipated expiration legal-status Critical

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00Refractors for light sources
    • F21V5/02Refractors for light sources of prismatic shape
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S10/00Lighting devices or systems producing a varying lighting effect
    • F21S10/007Lighting devices or systems producing a varying lighting effect using rotating transparent or colored disks, e.g. gobo wheels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00Lighting devices intended for fixed installation
    • F21S8/02Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/06Controlling the distribution of the light emitted by adjustment of elements by movement of refractors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/02Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages with provision for adjustment
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/08Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21WINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40Lighting for industrial, commercial, recreational or military use
    • F21W2131/406Lighting for industrial, commercial, recreational or military use for theatres, stages or film studios
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING 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
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Abstract

The invention relates to an ambient lighting system (1; 27), for example a building lighting system, comprising two aligned refractive elements (9, 10), the centres of which lie substantially in the radiation axis (11) of a light source (7), both elements being mounted to rotate about said radiation axis (11). According to said invention, driving means (18, 19; 13 to 17), including a control unit (20), for rotating said elements either in the same or in an opposite direction, are associated with said two refractive elements (9, 10); both refractive elements (9, 10) are prismatic elements and at least both refractive prismatic elements (9, 10) are arranged in a common housing (2; 28).

Description

  • The invention relates to a room lighting device, e.g. Architectural lighting device, with two aligned refractive elements whose centers are substantially in the beam axis of a light source, and one of which is rotatably held about the beam axis.
  • From DE 43 07 809 C a luminaire device is known in which in the beam path of a light source, a single wedge-shaped refractive element, which is arranged coaxially to the axis of the beam of the light source and rotated about this axis at a relatively high speed of at least 3600Upm. The refractive element deflects the light beam by a certain angle, resulting in a light cone surface on an irradiated surface, which orbits at high speed. The setting of this lighting device is usually carried out so that a surface is irradiated by the circular light cone surface whose diameter is twice as large as the diameter of the light cone surface which circles on the irradiated surface. This achieves an illumination of an enlarged area, which appears flicker-free to the human eye, in accordance with the area swept by the circular light cone area.
  • In room lighting devices, it is often desirable to direct a beam cone at certain areas or objects in the room or to change the direction of the beam cone for some reason. In conventional room lighting devices in which the light source is held in the region of a reflector arranged in a housing, a change in the orientation of the emitted light beam is effected by pivoting of the housing. The housing is optionally also held by a universal joint.
  • The disadvantage of such a solution that the electrical leads are also moved during a pivoting of the housing, so that the pivoting range of the housing is limited by the leads and can be little more than 360 °. This makes it necessary for a drive for Swiveling the housing Provide limit switches which at the same time prepare a reversal of the direction of movement of the housing. This is associated with a corresponding design effort. In addition, appropriate excess lengths of the leads must be provided, making them again susceptible to mechanical damage and therefore must be protected accordingly. This also increases the required design effort.
  • Furthermore, US Pat. No. 5,775,799 A discloses a room lighting device, in particular architectural lighting device, according to the initially cited type, wherein in this known room lighting device two lens disks are arranged in front of a light source; The lens discs are profiled optical elements having a plurality of thickened and thin areas, so as to achieve a partial refraction of light. One of the lens disks is adjustable relative to the second, stationary lens disk, for example, linearly displaceable or rotatable, thereby enabling different combined refractions of light and thus widen or narrow the light beam emitted by the light source. Thereby, a kind of "zooming", i. Adjusting the focal point in depth, allows, so that ultimately the incident on an illuminated surface light beam forms a larger or smaller light spot; However, it is not possible with this known room lighting device to allow the light beam to travel in space, about to illuminate certain areas of space, such as a workplace or an object exposed in a room, with the workplace or the site of the object changes.
  • In general, it is often desirable to move a light beam in a predetermined manner or let it "wander" in room lighting fixtures, so as to achieve certain optical effects.
  • It is therefore an object of the invention to provide a room lighting device as stated above, which allows easy to change the direction of the exiting light beam, without requiring a complicated suspension of Room lighting device would be required, and without special precautions for the protection of the necessary supply lines are necessary.
  • According to the invention this is achieved in a room lamp device of the type mentioned in that the other refractive element is rotatably supported about the beam axis, wherein the two refractive elements drive means including control unit for selectively co-rotating or counter-rotating are associated, and that both refractive elements are prism elements , Wherein at least the two refractive prism elements are arranged in a common housing.
  • The proposed measures, it is possible to deflect a light beam coming from the light source by appropriate control of the two refractive prism elements in a relatively large area and to direct in the desired direction. In this way it is possible to keep the room lighting device as such stationary and to adjust only the two refractive prism elements by corresponding rotation relative to each other, whereby the light beam is deflected due to the respective combined refraction of light. This allows the light beam - depending on the adjustment of the prism elements - to be deflected in any direction, without the light source itself is moved in any way. Thus, the light beam emerging from a substantially rigidly held light source can be deflected comparatively far from the optical axis of the light source, depending on the wedge angle of the prism elements, and reach, for example, virtually every point in a room. The maximum projection area to be brushed is, as mentioned, determined via the prism angle of the refractive prism elements and can be determined according to the respective field of application. It is of particular advantage that with the inventive technique also large light beam deflections can be realized, such as deflection angle of ± 45 ° relative to the optical axis of the light beam coming from the light source. The joint arrangement of the prism elements in a common housing is protected from dirt, dust or moisture Arrangement of the prism elements and a simplified mounting approximately on a ceiling or wall of a room allows.
  • The light source can be designed arbitrarily, which, in the case that special optical effects, such as in a showroom, are desired, can also be a projector or the like. Act. In this case, the emerging from the projector light beam can be deflected by the two independently movable prism elements in any direction. The light source may also be a contour radiator or any other luminaire with either sharp-edge imaging technology or color light technology or a combination of these.
  • For a linear pivoting of the light cone from the optical axis defined by the light source an equally fast counter-rotation of the two prism elements is required, whereas for a circle of the light cone about this optical axis, a co-rotation, coupled rotation of the two prism elements is required. The speeds used depend on the desired effect.
  • Of particular advantage, it is often when at least one refractive prismatic element on at least one prism surface has a lens-like bulge. In a corresponding manner, it is favorable if at least one refractive prism element has a lenticular depression on at least one prism surface. In this way, depending on the configuration of the prism elements in the form of convex or concave wedge lenses, the light beam can be bundled or scattered in order to reduce or enlarge the light spot on the illuminated surface or to achieve a higher or lower illuminance. It can also be provided combinations of convex and concave formations.
  • It is also advantageous if the light-refracting prism element, which is further away from the light source, is at least as large in size as the light-refractive prism element closer to the beam axis of the light source and is preferably of the same shape. In such a training, essentially the whole of the Light source exiting light beam even in unfavorable mutual position of the two prismatic elements pass through both, and therefore there are essentially no losses. This is especially the case if the prism element located farther away from the light source is larger than the prism element closer to the light source, and if the prism elements are identical in shape.
  • Furthermore, it is advantageous if the refractive prism elements have a circular cross-section. In this way, it is ensured that substantially all of the light beam emerging from the light source in the direction of the prism elements passes through it, regardless of the position of the two prism elements relative to one another.
  • For optimal motion control of the light beam, it is advantageous if the symmetries of the wedge angle of the two refractive prism elements extend substantially perpendicular to the beam axis of the light source.
  • However, in principle it is also possible to arrange one or both prism elements in such a way that one surface of each prism element runs essentially perpendicular to the beam axis of the light source.
  • If a separate motor is provided as a drive means for each refractive prism element, it is easily possible to adjust the two Prisemenelemente independently to deflect the light beam in any direction. It is advantageous for a simple realization of the drive connections, if the refractive prism elements are each surrounded by a ring gear, which meshes with a pinion, which is in communication with the associated motor. By these measures, the independent adjustment of the two prism elements is ensured in a simple manner.
  • In principle, the drive of the two refractive prism elements can also take place in other ways, for example with the aid of a friction drive. Thus, the two prism elements, in particular if they have a circular cross-section, are surrounded by a tight rubber ring, which acts on a reibrand. However, in a transmission with gears has the advantage that the transmission of a rotary motion positively and thus is very accurate and does not give the problem of slippage that can never be ruled out in a friction drive.
  • For a particularly compact design of the room lighting device, it is also advantageous if the motors are arranged in the region of the light source and drive the individual refractive prism elements via parallel to the beam axis of the light source extending waves.
  • A particularly space-saving design can be achieved if the two refractive prism elements are each surrounded by an annular armature forming the rotor of a respective electric motor, which further comprises a stator having at least two coils laterally of the armature.
  • In view of the achievable control options, it is also advantageous if the motors are stepper motors. With such stepper motors and the control of these stepper motors, it is possible to store in a simple manner positions of the respective stepping motor and then start again without own rotary encoders, such as optical rotation sensors, encoders, Hall sensors or the like. Sensor elements would be required. In connection with this, it is therefore further advantageous if the motors designed as stepping motors are assigned a control unit with a motor step counting module for position storage and control. The stepper motors can then, for example, directly drive the above-mentioned shafts in rotation and thus rotate the prism elements via the pinions and toothed rings.
  • It is also conceivable, in principle, to control the two prism elements in their movement starting from a single motor, for instance by means of a gear with two output shafts and with a changeover mechanism, with the aid of which the direction of rotation of the two output shafts between a rotation in the same direction and a reverse rotation can be switched. Incidentally, in addition to the above-mentioned transmissions with gears or with friction drive belt transmissions, with a V-belt, but also with a toothed belt, or worm gear can be provided. In addition to these mechanical drive means, electrical or electromagnetic drive means may be provided without mechanical transmission elements, an advantageous example of which is the above-mentioned embodiment with the annular armature directly on the prism elements and the associated stator in the region of the armature.
  • For a simple assembly and a compact design, it is then advantageous if the drive means including the control unit and the light source, which is preferably associated with a reflector, are arranged in the common housing. With such a design, the room lighting device can be installed in a particularly simple manner in ceilings, walls or floors of a room.
  • For the adjustment of the light cone of the room lighting device, in particular with regard to the achievement of special optical effects, it is further advantageous if the drive means of the refractive prism elements are controllable via a remote control. In this way, the movement of the light beam emerging from the room lighting device can be controlled from any location in the desired manner.
  • In this case, the remote control can also be influenced by a processor-controlled converter program, wherein the program can be stored in the simplest form in a transmitting / receiving unit in an EPROM. In this case, preselected settings for repeatedly approaching settings of the two prism elements are conceivable. It is also possible to provide a low speed for the adjustment of the prism elements in order to be able to quickly stop further movement in a processor-controlled or manually operated remote control room lighting device upon reaching a desired position of the light cone.
  • Furthermore, especially for architectural luminaires or spotlights, a drive of the drive means of the two prism elements is not limited by way of e.g. an infrared or radio remote control conceivable, but also via a hard wiring with its own control lines (bus). Furthermore, a modulated signal transmission to control the drive means of the refractive prism elements may be provided.
  • For various room lighting devices, the control signals for the drive means of the refractive prism elements may also be provided by another system, such as e.g. a building bus system, be derived and transmitted automatically.
  • For different applications or special optical effects, it is advantageous if at least one optical component, such as a color filter, a lens, a color changer or the like, is arranged between the light source and the downstream refractive prism element. In this way it is e.g. possible to influence the light color or the bundling or scattering of the emerging from the room lighting device light beam and adapt it to the respective requirements.
  • Of particular advantage, it is often also when a front unit is held on a housing containing the light source, which Vorsatzzeinheit has the common housing in which the two refractive prism elements are arranged. In such a design, a retrofitting of conventional lights with a front unit is possible, so that even with existing lights, the possibility is created to adjust the beam in the manner described in the room or to move.
  • In itself, the housing of the light source could be fixed independently of the housing of the attachment unit on the respective space surface or architectural surface, but it is particularly advantageous for ease of assembly, if the front unit and the housing of the light source for mutual connection fasteners, such as plug, screw and / or latching elements.
  • In order for the prism elements small dimensions in the thickness direction, i. in the direction of the light beam, it is further advantageous if the refractive prism elements are each formed with a plurality of linear prism areas or prism portions in the manner of Fresnellplatten. As a result of the overall stepped configuration of the prism elements, they have a comparatively small height, so that a low structural height is made possible for the room lighting device. This is particularly important for room lights with large diameter of importance. It is furthermore favorable if the prism areas or prism parts are matted or blackened on their surfaces extending at least substantially parallel to the beam axis in order to avoid total reflection. At the parallel or at a small angle to the optical axis extending surfaces of the so graded prism elements can be caused to undesirable effects by a total internal reflection at these surfaces. By roughening or matting these surfaces, the light emerges from this surface of the prism elements, but without resulting in a total reflection; The situation is similar with the blackening of the surfaces, since in this case the light rays are absorbed at the surfaces mentioned and converted into heat radiation (infrared radiation), whereby also a total internal reflection within the prism elements at these surfaces is avoided or at least greatly reduced.
  • It should be noted that, for example from FR 587 609 A, a motor vehicle headlamp is known in which two mutually rotatable prismatic disks are provided to adjust a light beam passing through them to the side, but also downwards. This is basically a manual adjustment of the headlights to achieve a correct alignment of the light beam while avoiding glare from drivers of oncoming vehicles. A similar motor vehicle headlamp training is further described in DE 701 365 C, where there are two prismatic disks are provided, which are coupled to a common pinion and can be rotated in opposite directions with the same speed. The pinion is coupled in particular with the steering system, so as to rotate the direction of rotation when the steering wheel is turned accordingly redirected light beams accordingly.
  • The invention will be further explained with reference to preferred embodiments illustrated in the drawing, to which, however, it should not be restricted. In detail:
    • Fig. 1 shows schematically a room lighting device according to the invention;
    • 2 shows in schematic form the setting options in such a room lighting device;
    • FIG. 3 shows a modified embodiment of such a room lighting device with a front-end unit in front of a ceiling light; FIG.
    • 4 shows in a detail in schematic cross section a design of the prism elements with a plurality of linear prism areas in the manner of Fresnellplatten, wherein a matting or blackening is also indicated on the vertical step surfaces;
    • 5 and 6 are schematic plan views of embodiments of the prism elements, wherein for driving the prism elements direct drive means are provided with a stepping motor;
    • and FIGS. 7, 7A, 7B and 7C show in an axonometric view, in plan view and in a view another embodiment of a prism element direct drive means.
  • In the illustrated in Fig. 1 embodiment of a room lighting device 1, a housing 2 is installed in a ceiling plate 3 of a room and held there with claws 4, wherein the housing 2 has a collar or flange 5, which rests against the ceiling plate 3 and an edge region of a Bore in the ceiling plate 3 overlaps.
  • In the housing 2, a reflector 6 is held, wherein the holder for the reflector 6 for reasons of clarity not shown. In any case, the reflector 6 is rigidly connected to the housing 2.
  • In the reflector 6, a light source 7, e.g. a lamp held, which can be of any type. Furthermore, in the reflector 6 a socket 7 'held for the light source 7, lead to the not shown leads, which serve to supply the light source 7 with the required electrical energy.
  • Below the light source 7, an optical component 8, such as a color filter and / or a lens and / or a color changer, is arranged, which is arranged substantially coaxially to the reflector 6.
  • Below this optical component 8 at least two substantially wedge-shaped refractive prism elements 9, 10 are arranged, which are each held rotatable by itself, whereby these prism elements 9, 10 arranged coaxially to the reflector 6 and about the beam axis 11, i. the optical axis of the light source 7 together with the reflector 6, are rotatable. The arrangement of the two prism elements 9, 10 is furthermore, as shown, preferably designed such that the symmetry of the wedge angle of each of these two prism elements 9, 10 is substantially perpendicular to the beam axis 11.
  • The two refractive prism elements 9, 10 have a substantially circular shape in plan view (see also Fig. 2) and carry at their periphery a sprocket 12. In principle, the prism elements 9, 10 but also be square or rectangular. Also, these prism elements 9, 10 may be a regular polygon, e.g. a regular hexagon, match. However, brightness differences in the generated light cone surface may result due to the corner regions of such refractive prism elements, but this may be desirable to achieve certain effects.
  • The sprockets 12 mesh each with a pinion 13 which is rotatably connected to a shaft 14. These shafts 14 are each in mounted a housing-fixed flange 15 and rotatably connected to a gear 16. Furthermore, the shafts 14 are also stored in an upper structural part, not shown. The gears 16 in turn mesh with each drive pinion 17 which is driven by a motor 18 and 19 respectively.
  • Of course, here also modified drive means configurations are possible, such as that the motors 18, 19 - which are preferably stepping motors - directly (ie without the gears 16/17) drive the shafts 14, the shafts 14, the output shafts of the motors 18, 19 or extensions thereof may be.
  • The control of the two motors 18, 19 via a control unit 20, which also supplies the corresponding voltage for the light source 7 and can be influenced via a remote control 21 shown only schematically. This control unit 20, in the case of the preferred embodiment of the motors 18, 19 as stepping motors, includes a motor step counting module 20 'as schematically arranged in Figs. 1 (and 3) so as to store motor positions by counting and storing steps or to be able to control it again later.
  • As can be seen in particular from FIG. 2, the two refractive prism elements 9, 10 can be rotated independently of each other. In the process, the light beam of the light source 7 passing through the upper refractive prism element 9 in FIG. 1 is refracted towards the thicker region of the refractive prism element 9. By the second refractive prism element 10 of this refracted light beam is refracted again.
  • By appropriately rotating one or both of the refractive prism elements 9, 10, the light cone emerging from the light source 7 or the light cone surface produced by the same on a projection surface can be moved over the area enclosed by a line 22. The light source 7 can also be formed by a lamp, for example by an LED or a plurality of LEDs.
  • It can be provided that the two refractive prism elements 9, 10 are constantly kept in rotation, with no problems with the leads to the light source 7, since the reflector 6 is fixed. But it is also possible to rotate one of the prism elements 9, 10 or both prism elements 9, 10 only to change the exit angle of the light beam from the room lighting device 1 and to leave after reaching the desired position in this. This depends on the desired optical effect.
  • In the embodiment shown in FIG. 1, the refractive prism elements 9, 10 are provided with substantially planar wedge or prism surfaces 23, 24 and 25, 26, respectively. If desired, however, these wedge surfaces 23 to 26 may be convex or concave, as shown diagrammatically at 23 'and 26' by dashed lines in Fig. 1, to focuss or diffuse through these prism elements 9, 10 passing light beam to reach. However, it is also essential in such a case that a substantially wedge-shaped shape of these refractive prism elements 9, 10 is maintained.
  • Instead of a round shape of the refractive prism elements 9, 10, as given in the illustrated embodiment, these prism elements 9, 10 may have any other shape, e.g. a square shape. It is only important that these prism elements 9, 10 are arranged "concentrically" to the beam axis 11 and are rotatable about them. Also, instead of the positive drive on the sprockets 12 and pinion 13, a friction drive for the refractive prism elements 9, 10 may be provided, wherein the prism elements 9, 10, e.g. may each be provided with a ring of an elastomeric material, which cooperate with drivable friction wheels.
  • 3 shows by way of example a conventional ceiling light 1 'with a light source 7 held in a reflector 6. The reflector 6 is held in a housing 2' of the ceiling light 1 ', an optical element 8 being held in the housing 2' again , The ceiling lamp 1 'according to FIG. 3 essentially corresponds to the luminaire according to FIG. 1, but contains the housing 2 'no refractive prism elements. Instead, on the housing 2 'of the ceiling light 1' an attachment unit 27 with refractive prism elements 9, 10 is mounted.
  • This attachment unit 27 has its own housing 28, which is provided with a flange 29 which is fastened by means of clamps 30 to a flange 5 of the housing 2 'of the ceiling light 1'.
  • In the housing 28, the two refractive prism elements 9, 10 are rotatably supported, and the refractive prism elements 9, 10 are provided with conical sprockets 12 ', which are driven by bevel pinions 13', which in turn are driven by motors 18, 19. In this case, the refractive prism elements 9, 10, and their conical sprockets 12 'are supported on two further, not shown bevel pinions, which provide a total of three bevel pinions simultaneously for centering the refractive prism elements 9, 10.
  • The control of the motors 18, 19 is again via a control unit 20, an electronic control system which is supplied via an electrical supply line 31 which is inserted via a passage 32 in the housing 28. In this case, the feed line 31 is also performed, for example, by the ceiling plate 3.
  • With the front end unit 27, a conventional ceiling light 1 'can be retrofitted to an inventive room lamp device 1 in retrospect, which works in combination with the front unit 27 as the room lamp device 1 of FIG.
  • The attachment unit 27 with the housing 28, in which the two independently rotatable prism elements 9, 10 are arranged, can be used as an attachment to any lamps or attached to their housings in front of the light source. The invention thus also encompasses a room lighting device in the form of such an attachment unit, which contains in a housing 28 at least two substantially wedge-shaped refractive prism elements 9, 10, which are rotatably supported, with respect to the beam axis 11 of the light source 7 are arranged in alignment and are independently rotatable. The prism elements 9, 10 located in this housing 28 of the attachment unit 27 comprise substantially the same features as described above. It is possible with the front unit 27 to retrofit any room lights with acting as a light direction unit attachment unit 27. It is useful if it is provided that the front unit 27 and the lighting device 1 'for mutual connection connecting elements, such as the brackets 30, but also other plug, screw and / or locking elements.
  • In principle, it is also possible to attach the front unit 27 not to the room lamp 1 'itself, but in the wall or ceiling areas surrounding the lamp.
  • Fig. 4 schematically illustrates two photorefractive prism elements 9, 10, the other components of the luminary device being omitted for the sake of simplicity; In this regard, however, reference may be made to FIG. 1 or FIG. 3. Only very schematically in Fig. 4 are bearings 33, 34 for the turn independently rotatably mounted prism elements 9, 10 shown, wherein the drive means have been omitted. However, the drive means may be designed as illustrated in FIG. 3 or else as illustrated in the following FIGS. 5, 6 or 7.
  • As shown in FIG. 4, the prism elements 9, 10 each have a plurality of linear prism regions 35 which extend at right angles to the central axis, namely to the optical axis or beam axis 11, which also defines the axis of rotation. In the schematic cross section, this results in a simple sawtooth-shaped contour in the manner of Fresnellplatten (see the upper prismatic element 9 in Fig. 4) or a double sawtooth-shaped contour (see the lower prismatic element 10 in Fig. 4). The vertical in Fig. 4, substantially parallel to the beam axis 11 surfaces 36 (but may also be inclined by a small angle to the beam axis 11) can lead to undesirable total internal reflections, as indicated in Fig. 4 by way of example at 37. To such a disadvantageous inner Total reflection to counteract, the surfaces 36 may be roughened or matted or blackened, as is indicated schematically in Fig. 4 by thickened lines. In the case of a roughening or matting of the surfaces 36, a beam of light which would otherwise be totally reflected is transmitted through the profiling of the surface 36, as indicated schematically at 38 in FIG. In the case of blackening, the light beam is absorbed and converted into heat. In both cases, the unwanted total reflection is avoided or at least largely reduced.
  • In Fig. 5, in a schematic plan view, one of the prism elements, e.g. 9 (or 10), which in turn is circular in plan view, and which is now surrounded by an annular armature 12A instead of a ring gear 12 as shown in Figure 1, which in the example of Figure 5 is a toothed soft iron core is formed and forms the rotor of the respective electric motor 18A (or 19A). This rotor, i. Armature 12A, in the embodiment shown, two electrical coils 40, 41 associated with which form the stator of the electric motor 18A (or 19A). In this way, a simple direct drive for the respective prism element, e.g. 9, wherein upon appropriate feeding of the coils 40, 41 with pulses, a stepping motor can be realized, which is driven by the respective control unit 20, not shown, as shown in FIG. 1 or 3. The corresponding compounds are obvious to a person skilled in the art and are therefore not further illustrated in FIG. 5 (as in the following FIGS. 6 and 7A to 7C).
  • Also illustrated in Fig. 6 is a comparable motor 18A in the form of a direct drive stepper motor, the armature 12A of which, in turn, drives the corresponding prism element, e.g. 9, formed by a permanent magnet ring having ring segments each defining a north pole and a south pole, i. are alternately magnetized. Again, at least two coils 40, 41 are laterally associated with this armature 12A as a stator of the motor 18A.
  • In Figs. 7A to 7C is an embodiment of the direct drive motor 18A (or 19A), here for example for the prism element 9, this motor 18A forming a hybrid stepping motor. Specifically, in turn, an armature 12A as a rotor surrounds the corresponding prism element, eg 9, and this armature 12A consists here of an upper toothed iron ring 42 and a lower toothed iron ring 43, a permanent magnet ring 44 being arranged between these two toothed iron rings 42, 43 is. As shown in FIG. 7A, the upper serrated iron ring 42 is preferably circumferentially offset from the lower serrated iron ring 43, more preferably by half a tooth pitch.
  • The rotor of the motor 18A thus formed, in turn, has as a stator at least two coils 40, 41 laterally, i. radially outside of it, assigned.
  • In all embodiments according to FIGS. 5, 6 and 7A to 7C, the coils 40, 41 (and optionally further coils) are fixedly arranged in the housing 2 (according to FIGS. 1 and 28 according to FIG. 3), and the prism elements 9, 10 with the armature 12A are rotatably mounted in bearings, such as indicated in Fig. 4 bearings 33 and 34, respectively. These bearings 33, 34 are then of course interrupted at the location of the coils 40, 41.

Claims (19)

  1. A room lighting system (1; 27), e.g. an architectural lighting system, including two alignedly arranged refractive elements (9, 10) whose centers are substantially located in the beam axis (11) of a light source (7) and one (10) of which is mounted to be rotatable about said beam axis (11), characterised in that also the other refractive element (9) is mounted to be rotatable about said beam axis (11), wherein drive means (18, 19; 13 to 17) plus control means (20) are associated with the two refractive elements (9, 10) for selective rotation in the same sense or in opposite senses, and that both of said refractive elements (9, 10) are prism elements, wherein at least the two refractive prism elements (9, 10) are arranged in a common housing (2; 28).
  2. A room lighting system according to claim 1, characterised in that at least one refractive prism element (10) comprises a lens-like bulge (26') on at least one prism surface (26).
  3. A room lighting system according to claim 1 or 2, characterised in that at least one refractive prism element (9) comprises a lens-like depression (23') on at least one prism surface (23).
  4. A room lighting system according to any one of claims 1 to 3, characterised in that the refractive prism element (10) arranged farther remote from the light source (7), in a plane perpendicular to the beam axis (11) of the light source (7), is at least as large as the refractive prism element (9) arranged closer to the light source (7), and is preferably equally designed.
  5. A room lighting system according to any one of claims 1 to 4, characterised in that the refractive prism elements (9, 10) have circular cross sections.
  6. A room lighting system according to any one of claims 1 to 5, characterised in that the symmetric lines of the wedge angles of the two refractive prism elements (9, 10) extend substantially perpendicular to the beam axis (11) of the light source (7).
  7. A room lighting system according to any one of claims 1 to 6, characterised in that a separate motor (18, 19) is provided as a drive means for each of said refractive prism elements (9, 10).
  8. A room lighting system according to claim 7, characterised in that the refractive prism elements (9, 10) are each surrounded by a toothed ring (12) which meshes with a pinion (13) connected to the associated motor (18, 19).
  9. A room lighting system according to claim 7 or 8, characterised in that the motors (18, 19) are arranged in the region of the light source (7) and drive the individual refractive prism elements (9, 10) via shafts (14) extending parallel with the beam axis (11) of the light source (7).
  10. A room lighting system according to claim 7, characterised in that the two refractive prism elements (9, 10) are each surrounded by an annular armature (12A), which constitutes the rotor of a respective electromotor (18A) additionally comprising, laterally of said armature (12A), a stator including at least two coils (40, 41).
  11. A room lighting system according to any one of claims 7 to 10, characterised in that the motors (18, 19; 18A) are step motors.
  12. A room lighting system according to claim 11, characterised in that a control means (20) including a motor step counting module (20') is associated with the motors (18, 19; 18A) designed as step motors for the storage and selection of a position.
  13. A room lighting system according to any one of claims 1 to 12, characterised in that also the drive means (18, 19, 13 to 17) plus control means (20) as well as the light source (7), which is preferably associated with a reflector (6), are arranged in the common housing (2).
  14. A room lighting system according to any one of claims 1 to 13, characterised in that the drive means (18, 19, 13 to 17) of the refractive prism elements (9, 10) are controllable via a remote control (21).
  15. A room lighting system according to any one of claims 1 to 14, characterised in that at least one optical component (8) such as a color filter, a lens, a color changer or the like is arranged between the light source (7) and the consecutively arranged refractive prism element (9).
  16. A room lighting system according to any one of claims 1 to 15, characterised in that an adapter unit (27) is mounted to a housing (2') containing the light source (7), which adapter unit (27) comprises the common housing (28) in which the two refractive prism elements (9, 10) are arranged.
  17. A room lighting system according to claim 16, characterised in that the adapter unit (27) and the housing (28) of the light source (7) comprise connecting members (30), e.g. plug-in, screw and/or latch members, for mutual connection.
  18. A room lighting system according to any one of claims 1 to 17, characterised in that the refractive prism elements (9, 10) are each designed with a plurality of linear prism regions (35) or prism parts in the manner of Fresnel screens.
  19. A room lighting system according to claim 18, characterised in that the prism regions (35) are frosted or blackened on their surfaces extending at least substantially parallel with the beam axis (36) so as to avoid total reflection.
EP04737368A 2003-07-24 2004-07-05 Ambient lighting system Expired - Fee Related EP1649212B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT11792003 2003-07-24
PCT/AT2004/000238 WO2005010433A1 (en) 2003-07-24 2004-07-05 Ambient lighting system

Publications (2)

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EP1649212A1 EP1649212A1 (en) 2006-04-26
EP1649212B1 true EP1649212B1 (en) 2007-01-17

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EP04737368A Expired - Fee Related EP1649212B1 (en) 2003-07-24 2004-07-05 Ambient lighting system

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US (1) US7217002B2 (en)
EP (1) EP1649212B1 (en)
JP (1) JP4564492B2 (en)
AT (1) AT352011T (en)
DE (1) DE502004002696D1 (en)
WO (1) WO2005010433A1 (en)

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Also Published As

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WO2005010433A1 (en) 2005-02-03
JP4564492B2 (en) 2010-10-20
JP2006528820A (en) 2006-12-21
DE502004002696D1 (en) 2007-03-08
AT352011T (en) 2007-02-15
US20060187654A1 (en) 2006-08-24
US7217002B2 (en) 2007-05-15
EP1649212A1 (en) 2006-04-26

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