DE202015105853U1 - lighting device - Google Patents

lighting device

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Publication number
DE202015105853U1
DE202015105853U1 DE202015105853.5U DE202015105853U DE202015105853U1 DE 202015105853 U1 DE202015105853 U1 DE 202015105853U1 DE 202015105853 U DE202015105853 U DE 202015105853U DE 202015105853 U1 DE202015105853 U1 DE 202015105853U1
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DE
Germany
Prior art keywords
lighting device
according
light source
light sources
provided
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Active
Application number
DE202015105853.5U
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German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zumtobel Lighting GmbH, Germany
Original Assignee
Zumtobel Lighting GmbH, Germany
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Publication date
Application filed by Zumtobel Lighting GmbH, Germany filed Critical Zumtobel Lighting GmbH, Germany
Priority to DE202015105853.5U priority Critical patent/DE202015105853U1/en
Publication of DE202015105853U1 publication Critical patent/DE202015105853U1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F21S10/02Lighting devices or systems producing a varying lighting effect changing colors
    • F21S10/023Lighting devices or systems producing a varying lighting effect changing colors by selectively switching fixed light sources
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B45/00Circuit arrangements for operating light emitting diodes [LED]
    • H05B45/30Driver circuits
    • H05B45/37Converter circuits
    • 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
    • F21Y2105/00Planar light sources
    • F21Y2105/10Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • F21Y2105/12Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
    • 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
    • F21Y2113/00Combination of light sources
    • F21Y2113/10Combination of light sources of different colours
    • F21Y2113/13Combination of light sources of different colours comprising an assembly of point-like light sources
    • 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
    • F21Y2113/00Combination of light sources
    • F21Y2113/10Combination of light sources of different colours
    • F21Y2113/13Combination of light sources of different colours comprising an assembly of point-like light sources
    • F21Y2113/17Combination of light sources of different colours comprising an assembly of point-like light sources forming a single encapsulated light source
    • 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]
    • 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]
    • F21Y2115/15Organic light-emitting diodes [OLED]

Abstract

Lighting device (10), in particular a spotlight lighting device, comprising: - at least one planar, matrix-like light source (11) comprising a plurality of individual light sources (12, 13) each capable of emitting light of a defined wavelength; - Wherein at least a first region (12) with at least one individual light source and a second region (13) with at least one individual light source are independently controllable; and - wherein the individual light sources of the at least two regions (12, 13) are arranged to emit light with differently defined wavelengths.

Description

  • 1. Field of the invention
  • The present invention relates to a lighting device, in particular a spotlight lighting device.
  • 2. Background
  • Lighting devices are known from the prior art, in which the emission characteristic is provided by a static emitting light source and an associated optical arrangement. Furthermore, lighting devices are known in which the light source is not formed statically, but in the certain areas of the light source can be controlled independently, so that thereby the emission characteristics of the lighting device can be changed.
  • In the light of this prior art, it is an object of the present invention to provide a lighting device, in particular a spotlight lighting device, in which the radiation characteristic of the lighting device is adjustable with higher degrees of freedom. In particular, a lighting device is to be provided with which a multi-color center-beam arrangement can be provided.
  • These and other objects, which will become apparent upon reading the following description or may be recognized by those skilled in the art, are achieved by the subject-matter of the independent claim. The dependent claims further form the central idea of the present invention in a particularly advantageous manner.
  • 3. Detailed description of the invention
  • A lighting device according to the invention, in particular a spotlight lighting device, comprises: at least one planar, matrix-like light source comprising a plurality of individual light sources each capable of emitting light of a defined wavelength; wherein at least one first area with at least one individual light source and a second area with at least one individual light source can be controlled independently of each other; and wherein the individual light sources of the at least two regions are adapted to emit light with differently defined wavelengths.
  • In other words, the present invention proposes to provide a plurality of regions (at least two regions) with individual light sources in a planar, matrix-like light source, which can be controlled independently of one another with regard to their respective light intensities, so that different regions with different light intensities can be illuminated or If the respective illuminated areas overlap, a corresponding mixed light can be provided.
  • Preferably, the individual light sources of the light source are arranged point and / or mirror symmetry. For example, the light source may have a substantially circular shape or the individual light sources may be arranged in a cross shape. This makes it possible to provide a total conical light emission characteristic of the lighting device, which is particularly preferred for spotlight applications.
  • Preferably, the first region of the light source is an inner region and the second region is an outer region surrounding the inner region. The inner region of the light source can provide a so-called center beam, which can be surrounded by the light output of the individual light sources in the outer region. Alternate IV for forming the second region as the first region completely surrounding area, it is possible to surround the inner region of the light source through a plurality of outer regions of the light source. This makes it possible to control the multiple outer regions of the light source independently of each other, so that the light output of the lighting device is adjustable with further degrees of freedom.
  • Furthermore, it is possible to provide the respective regions of the light source by a combination of a plurality of individual light sources which emit substantially light with the same defined wavelength, it being preferred in this context that the individual light sources of a composite are distributed over the light source. As a result, the possibility already exists of being able to provide thorough mixing of the respectively emitted light of the individual light sources as a result of the arrangement of the individual light sources, so that, depending on the application, a subsequent mixing arrangement can optionally be dispensed with.
  • Preferably, at least one optical arrangement and / or a mixing arrangement are provided in the emission direction of the light source behind the light source. The optical arrangement may, for example, comprise collecting lenses or reflector arrangements in order to be able to provide directional and bundled light emission by the lighting device.
  • The individual light sources of the light source can be designed, for example, as LED light sources, in which respect individual LEDs or chip-on-board LEDs can be used. Due to the use of LED light sources persists a simple way the ability to provide individual light sources that can deliver light with different wavelengths defined.
  • As far as the light source is provided as LED light sources, it is preferred that these are designed as a chip-scale package or as a chip-scale package arrays. This makes it possible to provide a comparatively high single light source density.
  • Preferably, the individual light sources of a region are interconnected as a serial string or as serial strings connected in parallel with one another and can be driven together. In this connection, it is preferred that the strands of a region can each be supplied with energy by a converter unit or by a channel of a multi-channel converter unit. Alternat IV or in addition thereto, at least two strands of different regions can be supplied with energy by a channel of a converter unit, wherein between the at least two strands a, preferably potential-free, adjustable resistor is arranged. Due to the adjustable resistor, it is possible to shift the load in the parallel strands so that the strands are supplied with more or less current, in order thereby to be able to change the intensity of the individual light sources arranged in a respective strand. In this regard, it is also possible that each strand is assigned a correspondingly adjustable resistance, so that all strands can be set arbitrarily and differently to each other. In this embodiment, therefore, all the serial strands of a region interconnected in parallel can also be set differently with regard to their light intensity.
  • The adjustable resistor can be provided by a mechanically adjustable potentiometer, which is preferably adjustable by a controllable actuator. Alternat IV, it is possible to provide the adjustable resistor, by a controllable digital potentiometer, which can be controlled or adjusted, for example via a key input, a switch or the like. It is also possible, such a digital potentiometer by a microcontroller control, which can be integrated, for example, in the converter unit to control.
  • Particularly preferably, the adjustable resistor is provided by a resistor cascade, which can be controlled by a microcontroller, preferably by the microcontroller control a reed circuit is controlled.
  • Preferably, a control unit for controlling the adjustable resistor, which is preferably integrated in the converter unit, is provided, wherein the control of the adjustable resistor is preferably provided by means of a signal over-power drive.
  • Preferably, at least one fixed resistor is provided in at least one strand of a region in addition to the adjustable resistor. It is preferred that the fixed resistor or the fixed resistors are selected such that they can pick up the adjustable resistor or the adjustable resistors in a neutral position, d. H. that the fixed resistor or the fixed resistors represent an equal consumer, such as the adjustable resistor or the adjustable resistors in neutral position. In the embodiment in which all the individual light sources are designed as equivalent consumers and light generators, it is therefore possible to provide the same current in all parallel strings, so that in this "neutral position" all the individual light sources (preferably LEDs) are substantially the same bright. Furthermore, there is the possibility to select the "neutral position" such that in the adjustable resistor or the adjustable resistors, a mean resistance value is provided so that the load of the consumer by the adjustable resistor or by the adjustable resistors in one or Other direction can be moved so that the current and thus the proportion of light in the respective strands, higher or lower can be set. When the adjustable resistor is provided by a resistor cascade, it is particularly preferred that the fixed resistor corresponds to approximately one third of the highest resistance provided in the resistor cascade.
  • Alternat IV or in addition to the use of LED light sources as individual light sources, it is possible to provide the light source through a light source matrix in the form of an OLED matrix. It is particularly preferred that such an OLED matrix can be controlled pixel by pixel, in which case the controllable pixels represent the individual light sources.
  • Alternate IV for forming the light source by means of the LED light sources or as an OLED matrix, it is possible to provide the light source through a light source matrix in the form of a color conversion matrix, wherein the individual light sources are provided by cells of the color conversion matrix. The cells comprise a phosphor which can be excited by means of at least one laser beam of a laser arrangement for secondary light output.
  • The color conversion matrix can be provided, for example, by appropriate casting compounds in the phosphor. In this case, green, yellow or red phosphor or a mixture thereof may be contained in the cells of the color conversion matrix, wherein preferably an organic phosphor or a quantum dot is used, which is preferably excitable by means of a blue laser beam to the secondary light output.
  • A phosphor in the context of the present invention is generally a substance that can be excited by laser light and then emits a secondary light spectrum. Examples of phosphors which can be used here are: ZnS, ZnSe, CdS, CdSe, ZnTe, CdTe), silicates (Ca 3 Sc 2 Si 3 O 12 : Ce 3+ ), orthosilicates (BOSE), garnets (YAG: Ce 3+ , ( YGd) AG: Ce 3+ , LuAG: Ce 3+ ), oxides (CaScO 2 : Eu 2+ ), SiALONs (a-SiAlON: Eu 2+ , b-SiAlON: Eu 2+ ), nitrides (La 3 Si 6 N 11 : Ce 3+ , CaAlSiN 3 : Ce 3+ ), oxy-nitrides (SrSi 2 N 2 O 2 : Eu 2+ , (Ca, Sr, Ba) Si 2 N 2 O 2 : Eu 2+ ).
  • In a preferred embodiment, the at least one laser beam is directed by means of a micromirror arrangement onto the respective cells of the color conversion matrix. In this case, it is particularly preferred that the micromirror arrangement can be directed at the cells at a frequency between 30 and 1000 Hz, preferably between 50 and 200 Hz. If the dynamics of the micromirror arrangement are selected to be sufficiently large (which is the case at frequencies of ≥ about 30 Hz, ie 30 distractions per second), the individual exposures of the system generated by the system blur into a single composite image for the human eye. In practice, it has been found that flicker and jitter free imaging can be provided at a frequency of about 200 Hz, with film camera applications preferably employing higher frequencies of up to 1000 Hz.
  • Alternate IV or in addition to the use of a micromirror arrangement, with which the laser beam can be directed to different cells of the color conversion matrix, certain cells may comprise a fixedly aligned laser beam. This makes it possible to control certain or all cells at the same time.
  • Alternate IV for deflecting a laser beam or for assigning a laser beam to a cell of the color conversion matrix, it is possible to arrange the color conversion matrix itself so movable in the lighting device that the respective cells of the color conversion matrix are movable into at least one stationary laser beam. For example, such mobility of the color conversion matrix may be provided by one or more piezoelectric or electromagnetic actuators. Such actuators can for example be connected to the edge regions of the color conversion matrix, so that the color conversion matrix can be moved freely accordingly.
  • The individual light sources of at least one region of the light source are preferably provided such that this region can emit a white light with a color temperature between 4500 K and 800 K, preferably between 5000 K and 7500 K and particularly preferably about 6000 K; and wherein the individual light sources of at least one further region are provided such that this further region can emit a white light having a color temperature between 2500 K and 4000 K, preferably between 3000 K and 3500 K and particularly preferably of about 3000 K. As a result, there is the possibility that the lighting device can be set between a warm white white light and a cold white white light or that corresponding light mixtures can be provided.
  • The individual light sources of at least one region of the light source are preferably provided in such a way that this region can emit red light with a peak wavelength between 580 and 670 Nm, wherein the individual light sources of at least one further region are preferably provided such that this region has blue light with a peak wavelength between 390 and 480 Nm, the individual light sources of at least one further region of the light source preferably being provided in such a way that this region can emit green light with a peak wavelength between about 480 and 560 Nm, the individual light sources preferably being at least one further region of the light source are provided so that this area can emit yellow light with a peak wavelength between 560 and 630 nm. As a result, there is the possibility that a color-variable system can be provided by the lighting device, so that substantially all colors of the color space can be provided. In this context, it is also possible to provide only certain peak wavelengths through the individual light sources of the respective areas, so that the lighting device can emit light in a corresponding color space.
  • Preferably, the lighting device comprises at least two surface, matrix-like constructed light sources, which are substantially aligned to the same illumination field. When using only a planar, matrix-like constructed light source, there is a risk that the light output "spotty" fails, depending on the number of individual light sources used and depending on the size of the area to be lit. Through the use of at least two flat, matrix-like constructed light sources, the substantially can be aligned to the same illumination field (for example by means of a corresponding optics) can be achieved by superposition of the two light outputs a very homogeneous overall light image. In this context, it is preferred that two planar, matrix-like light sources have an inverted arrangement of the individual light sources. In other words, it is preferred that the individual light sources are arranged inversely symmetrical on the light sources, so that there is a particularly advantageous superposition of the two light outputs.
  • 4. Description of preferred embodiments
  • Hereinafter, a detailed description of the figures will be given. It shows:
  • 1 a schematic view of a first embodiment of a lighting device according to the invention;
  • 2 LED light sources, which are preferably used in a lighting device according to the invention;
  • 3 a schematic view of another embodiment of a lighting device according to the invention with an OLED matrix as a light source;
  • 4 a schematic view of another embodiment of a lighting device according to the invention with two light sources, which are aligned substantially on the same illumination field;
  • 5 a schematic view of two light sources, as they are preferably used in a lighting device according to the invention;
  • 6 a schematic view of different light sources, as they can be used in a preferred embodiment of a lighting device according to the invention;
  • 7 a schematic view of another preferred embodiment of a lighting device according to the invention, wherein the light source is provided by a light source matrix in the form of a color conversion matrix;
  • 8th a schematic view of another embodiment of a lighting device according to the invention;
  • 9 a schematic view of another preferred embodiment of a lighting device according to the invention;
  • 10 a schematic view of another preferred embodiment of a lighting device according to the invention;
  • 11 a schematic view of a preferred interconnection of the individual light sources of a range;
  • 12 a schematic view of an adjustable resistor in the form of an adjustable potentiometer;
  • 13 a schematic view of a preferred interconnection of the light source;
  • 14 a schematic view of an adjustable resistor in the form of a resistor cascade with a microcontroller control;
  • 15 a schematic view of a preferred interconnection of the light source with an integrated in the converter microcontroller circuit of the adjustable resistor;
  • 16 a schematic view of a preferred interconnection of the light source with a separate microcontroller circuit of the adjustable resistor;
  • 17 a schematic view of an interconnection of two light sources with a four-channel converter and two adjustable resistors;
  • 18 a schematic view of an interconnection of a light source with at least one fixed resistor.
  • 1 shows a schematic view of a first preferred embodiment of a lighting device according to the invention 10 with a flat, matrix-like light source 11 in front of an optical element 15 (Preferably, a lens assembly) is arranged.
  • The light source 11 includes an inner area 12 and in the preferred embodiment shown, four outer regions 13 , In the 1 shown areas 12 . 13 In this case, individual light sources (for example LED light sources), a plurality of individual light sources and / or a multiplicity of individual light sources interconnected with each other can be represented.
  • The preferred embodiment shown represents a so-called center-beam arrangement, in which an inner region of the light source 11 is arranged with one or more surrounding areas of the light source. The respective regions of the light source can be controlled independently of each other, so that the on the right side lighting (see reference numeral 20 ) can be adjusted. As in 1 can be clearly seen, with a lighting device according to the invention 10 a symmetrical and asymmetrical radiation characteristic with different lighting focuses are provided.
  • 2 shows a schematic view of two light sources 11 I , 11 II . In the 2 illustrated light source 11 In this case, I comprises individual LED light sources, which can be arranged, for example, on a common board, whereas those in FIG 2 shown right light source 11 II is designed as a so-called chip-on-board LED light source. In this context, LED light sources can be used, which are designed as a chip-scale package or as a chip-scale package array (especially for applications in which a correspondingly high luminous flux to be made available).
  • 3 shows a schematic view of another preferred embodiment of a lighting device according to the invention 10 III , in contrast to those in the 1 and 2 shown embodiments as a light source an OLED matrix 11 III is used. The OLED matrix 11 III is designed such that the individual pixels / cells of the OLED matrix 11 III are independently controllable.
  • 4 shows a further preferred embodiment of a lighting device according to the invention 10 IV , the two light sources 11 IV includes. The optical arrangement 15 IV is designed such that the two light sources 11 IV are substantially aligned to the same illumination field, so that of the light sources 11 IV emitted light can be superimposed accordingly. In order to provide as homogeneous a light field as possible, it is particularly preferred that the light sources 11 IV has a mirrored or inverted arrangement of the individual light sources, so that as far as possible a "spot-free" images are provided.
  • 5 shows a schematic view of two more or less complex constructed light sources 11 V , 11 VI dar. The in 5 shown light sources 11 V , 11 VI can already provide a comparatively homogeneous light output due to their size. The light field 11 V in this case has an inner region 12 V , which is provided by a plurality of individual light sources (preferably LED light sources), wherein the inner region 12 V through an outer area 13 V is surrounded. The light field 11 In contrast, VI has areas which are provided by a combination of a plurality of individual light sources which emit substantially light of the same defined wavelength (in FIG 5 these are each provided with identical hatching). As in 5 It is easy to see that the individual light sources of a particular compound are above the light source 11 VI arranged distributed, so that there is already a comparatively good mixing of the emitted light due to the arrangement of the individual light sources.
  • 6 shows a schematic view of a plurality of light source geometries, which may comprise a plurality of planar, matrix-like light sources. With the arrangements of the various light sources for a lighting device shown, a particularly advantageous, homogeneous light output can be provided by the lighting device. The arrangements shown are particularly preferred for different luminaire geometries (for example, elongated lights, wall or ceiling spotlights, spotlight lighting, etc.) can be used. Preferably, the in 6 shown respective light sources are each supplied by a channel of a converter or in each case by a separate converter, so that the respective light sources are independently controllable.
  • 7 shows a schematic view of another preferred embodiment of a lighting device 10 VII , wherein the light source through a light source matrix in the form of a color conversion matrix 10 VII is provided. The individual light sources are thereby through the cells of the color conversion matrix 10 VII provided. The cells each comprise a luminescent substance, which by means of a laser beam (preferably a blue laser beam) of a laser arrangement 26 VII is excitable to the secondary light output. In the cells of the color conversion matrix 11 VII may be green, yellow or red phosphor or a mixture thereof. In the preferred embodiment shown, the lighting device comprises 10 VII further a micromirror arrangement 25 VII , with the laser beam on the different cells of the color conversion matrix 11 VII can be distracted. The laser beam is preferably a blue-emitting laser, which can excite the phosphors contained in the cells accordingly. The micromirror arrangement 25 VII is designed such that this with a frequency between 30 and 1000 Hz, preferably with a frequency between 50 and 200 Hz, a laser on different cells of the color conversion matrix 11 VII can judge.
  • 8th shows a schematic view of another embodiment of a lighting device according to the invention 10 VIII , in contrast to the in 7 In the embodiment shown, several laser arrangements 26 VIII are arranged stationary and are aligned such that these on one or on certain cells of the color conversion matrix 10 VIII are directed. In addition to the in 8th shown stationary laser arrangements 26 VIII may also include a laser arrangement such as 26 VII with a micromirror arrangement 25 VII (cf. 7 ) are used. Alternatively, it is possible for each cell of the color conversion matrix 11 VIII assign a single laser, so that a micromirror arrangement 25 VII could be completely dispensed with. Such a system can parallel all cells of the color conversion matrix 11 Head for VIII .
  • 9 shows a further preferred embodiment of a lighting device according to the invention 10 IX . Unlike the ones in the 7 and 8th shown light emitting devices is the color conversion matrix 11 IX arranged movable in this embodiment, in such a way that the cells of the color conversion matrix 11 IX in a stationary laser of a laser array 26 IX can be moved. The color conversion matrix 10 IX is preferably for this purpose by means of piezoelectric or electromagnetic actuators 30 IX trained movable.
  • 10 shows a further embodiment of a preferred lighting device 10 X , where the light source in turn as a color conversion matrix 11 X is provided. Unlike the ones in the 1 to 9 In embodiments shown, this embodiment further comprises a mixing chamber connected downstream of the light source 16 X for homogenizing the light emitted by the individual light sources. Such a mixing chamber 16 X can be used in all shown embodiments of the lighting device.
  • 11 shows an exemplary interconnection of a portion of a device according to the invention by means of a single-channel converter 50 , In this embodiment, all respective regions of a planar, matrix-like constructed light source 11 by means of a, preferably controllable, converter 50 operated. As in 11 1, the individual light sources of a respective area are provided as serial strands connected in parallel with one another and thus can be controlled jointly.
  • 12 shows an exemplary interconnection of two light sources, each having inner LEDs for providing a center beam and outer LEDs for providing a light output surrounding the inner region.
  • As in 12 It is easy to recognize that the respective inner areas are there 12 the light sources from the respective outer areas 13 each of the light sources by an adjustable resistor 60 , which is respectively integrated into the parallel circuits, separated. Due to the adjustable resistors 60 For example, the load in the parallel strands can be shifted so that the respective strands are supplied with more or less current, so that the light intensity of the inner and outer regions 12 . 13 each can be controlled or controlled independently. 12 should only show how, by an adjustable resistor 60 respective areas of the light source or respective strands of the light source can be set independently. In a further embodiment, an adjustable resistance can be assigned to each light source strand shown, so that all light source strands can be set to any desired and different one another. As in 12 It can be seen, is the converter 50 formed in this embodiment as a two-channel converter, which can control the respective light fields independently. For lighting devices with other light sources, multi-channel converters or multiple single-channel converters can be used accordingly.
  • 13 shows an exemplary embodiment of an adjustable resistor in the form of an adjustable potentiometer with different resistances, which can be switched on as needed. In addition to mechanically adjustable potentiometers, it is also possible to use controllable digital potentiometers (so-called electronic potentiometers) which may be in the form of a transistor circuit or a microcontroller circuit. Preferably, the digital potentiometers can be controlled via or through a converter. For example, digital or electronic potentiometers are known which comprise individual resistors connected in series and electronic switches. Such an arrangement can be summarized as a digital control circuit to an integrated circuit. In the present case, for example, digital potentiometers in the form of a so-called trim potentiometer, which maintains a set value or can be set by means of keys, an incremental encoder or a microcontroller, can be set by the digital potentiometer. The latter usually have a volatile and / or a non-volatile memory for the settings made. Also, other electronic variants of variable resistors may be used, such as DAC circuits or operational amplifier circuits. It is particularly preferred that the adjustable resistor or the resistor cascade is floating, and that over the respective resistors a certain power can flow. Depending on the LEDs used, LED strings are typically operated with a current between 10 and 2000 mA.
  • Particularly preferred in the present case, a microcontroller circuit is used, the reed switch controls, so that thereby the potential-free resistor cascade can be set freely as needed. The size of the resistor cascade used (that is, the number of respective resistors and the respective resistance values) can be adapted depending on the application. The microcontroller circuit can also be integrated directly into an inserted LED module and provided with a corresponding control line. In this context, it is also possible that the control signal is transmitted via the supply voltage of the converter, preferably as a so-called signal-over-power signal. Furthermore, there is the possibility that the microcontroller circuit is integrated as a separate component between an LED module and a converter or directly in a converter.
  • 14 shows by way of example a microcontroller circuit with a memory which can control one or more reed switches (RS1 to RS3) and thereby adjust the, preferably potential-free, resistor cascade (R1 to R3) as required.
  • 15 shows an example of a microcontroller circuit which is integrated in a converter and the corresponding switch (RS1 ...) can control to switch a resistor cascade (R1 ...) accordingly.
  • 16 shows a schematic view of another Verschaltungsmöglichkeit, wherein the microcontroller circuit in contrast to the in 15 shown microcontroller circuit is designed as a separate component.
  • 17 shows an exemplary interconnection arrangement for two light sources whose respective areas are provided by two adjustable resistors, which are provided by a microcontroller circuit, which drive the respective resistor cascades. In the in 17 shown embodiment, the converter is a four-channel converter, wherein in 16 By way of example, an interconnection for a signal over-power control of the microcontroller circuit is shown.
  • 18 shows an exemplary interconnection, in which at least one fixed resistor ("R4") in one of the LED strands (here for the inner region of a light source) is provided. By the fixed resistor "R4" shown, it is possible to provide a training in which the fixed resistor is just as large a consumer as the adjustable resistor in a middle resistance value position. As far as the LED light sources are designed as equivalent consumers (which is preferred) flows in this case at medium resistance value of the adjustable resistor in all parallel strands of the same stream, so that all LEDs thus light up bright. This makes it possible to shift the load of the consumer through or through the adjustable resistor in the one or in the other direction, so that the current and thus the proportion of light in the respective strands can be set higher or lower. In practice, it has been shown that the value for the fixed resistor "R4" is preferably one third of the highest resistance in the cascade.
  • The present invention is not limited to the foregoing embodiments as long as it is an object of the following claims. Furthermore, the preceding embodiments can be combined in any way with and among each other.

Claims (37)

  1. Lighting device ( 10 ), in particular a spotlight lighting device, comprising: - at least one planar, matrix-like light source ( 11 ) containing several individual light sources ( 12 . 13 ) each capable of emitting light of a defined wavelength; - at least a first area ( 12 ) with at least one individual light source and a second region ( 13 ) are independently controllable with at least one individual light source; and - wherein the individual light sources of the at least two regions ( 12 . 13 ) are adapted to emit light with different defined wavelengths.
  2. Lighting device ( 10 ) according to claim 1, wherein the individual light sources of the light source ( 11 ) are arranged point and / or mirror symmetry.
  3. Lighting device ( 10 ) according to one of claims 1 or 2, wherein the first region ( 12 ) of the light source ( 11 ) is an inner region and the second region ( 13 ) is an outer area surrounding the inner area.
  4. Lighting device ( 10 ) according to one of claims 1 or 2, wherein the first region ( 12 ) of the light source ( 11 ) is an inner region that is separated from several outer regions ( 13 ) of the light source ( 11 ) is surrounded.
  5. Lighting device ( 10 ) according to one of claims 1 or 2, wherein the regions are provided by a combination of a plurality of individual light sources, which emit substantially light of the same defined wavelength.
  6. Lighting device ( 10 ) according to claim 5, wherein the individual light sources of a composite via the light source ( 11 ) are arranged distributed.
  7. Lighting device ( 10 ) according to one of the preceding claims, wherein in the emission direction the light source ( 11 ) behind the light source ( 11 ) at least one optical arrangement ( 15 ) and / or a mixing arrangement ( 16 ) is provided.
  8. Lighting device ( 10 ) according to claim 7, wherein the optical arrangement ( 15 ) comprises a converging lens or a reflector assembly.
  9. Lighting device ( 10 ) according to one of the preceding claims, wherein the individual light sources of the light source ( 11 ) LED light sources are, in particular provided by individual LEDs or by chip-on-board LEDs.
  10. Lighting device ( 10 ) according to one of the preceding claims, wherein the light source ( 11 ) Are LED light sources, which are formed as a chip-scale package or as chip-scale package arrays.
  11. Lighting device ( 10 ) according to one of the preceding claims, wherein the individual light sources of a region ( 12 . 13 ) connected as a serial line or as a parallel interconnected serial strings and can be controlled together.
  12. Lighting device ( 10 ) according to claim 11, wherein the strands of a region in each case by a converter unit ( 50 ) or by a channel of a multi-channel converter unit ( 50 ) be energized.
  13. Lighting device ( 10 ) according to one of claims 1 to 11, wherein at least two strands of different regions ( 12 . 13 ) through a channel of a converter unit ( 50 ) are energized and wherein between the at least two strands a, preferably potential-free, adjustable resistance ( 60 ) is arranged.
  14. Lighting device ( 10 ) according to claim 13, wherein the adjustable resistor ( 60 ) is provided by a mechanically adjustable potentiometer.
  15. Lighting device ( 10 ) according to claim 14, wherein the mechanically adjustable potentiometer is adjustable by a controllable actuator.
  16. Lighting device ( 10 ) according to claim 13, wherein the adjustable resistor ( 60 ) is provided by a drivable digital potentiometer.
  17. Lighting device ( 10 ) according to claim 13, wherein the adjustable resistor ( 60 ) is provided by a resistor cascade with a microcontroller controlling a reed circuit.
  18. Lighting device ( 10 ) according to one of claims 13 to 17, wherein a control unit for controlling the adjustable resistor ( 60 ), preferably in the converter unit ( 50 ) is provided, wherein the control of the adjustable resistor ( 60 ) is preferably a signal over-power control.
  19. Lighting device ( 10 ) according to one of claims 13 to 18, wherein besides the adjustable resistor ( 60 ) at least one fixed resistor (R4) in at least one strand of a region ( 12 . 13 ) is provided.
  20. Lighting device ( 10 ) according to claim 17 and 19, wherein the value of the fixed resistor (R4) corresponds to about 1/3 of the highest resistance provided in the resistor cascade.
  21. Lighting device ( 10 ) according to one of the preceding claims, wherein the light source ( 11 ) is provided by a light source matrix in the form of an OLED matrix.
  22. Lighting device ( 10 ) according to one of the preceding claims, wherein the light source ( 11 ) is provided by a light source matrix in the form of a color conversion matrix, wherein the individual light sources are provided by cells comprising a phosphor, which by means of at least one laser beam of a laser array ( 26 ) is excitable to the secondary light output.
  23. Lighting device ( 10 ) according to claim 22, wherein in the cells of the color conversion matrix green, yellow or red phosphor or a mixture thereof is contained.
  24. Lighting device ( 10 ) according to claim 23, wherein the phosphor is preferably an inorganic phosphor or a quantum dot, which is preferably excitable by means of a blue laser beam for secondary light output.
  25. Lighting device ( 10 ) according to one of claims 22 to 24, wherein the at least one laser beam by means of a micromirror arrangement ( 25 ) is directed to the respective cells of the color conversion matrix.
  26. Lighting device ( 10 ) according to claim 25, wherein the micromirror arrangement ( 25 ) is directed to the cells at a frequency between 30 and 1000 Hz, preferably between 50 and 200 Hz.
  27. Lighting device ( 10 ) according to any of claims 22 to 24, wherein each cell is associated with a laser beam fixedly directed thereto.
  28. Lighting device ( 10 ) according to any one of claims 22 to 24, wherein at least one laser beam by means of a micromirror arrangement ( 25 ) is directable to certain cells of the color conversion matrix and at least one further laser beam is permanently assigned to a cell.
  29. Lighting device ( 10 ) according to any one of claims 22 to 24, wherein the color conversion matrix is so movable in the lighting device ( 10 ) is arranged such that the respective cells of the color conversion matrix are movable in at least one stationary laser steel.
  30. Lighting device ( 10 ) according to claim 29, wherein the color conversion matrix by means of at least one piezoelectric or at least one electromagnetic actuator ( 30 ) is moved.
  31. Lighting device ( 10 ) according to one of the preceding claims, wherein the individual light sources of at least one area ( 12 . 13 ) of the light source ( 11 ) are provided such that this area can deliver a white light having a color temperature between 4500 K and 8000 K, preferably between 5000 K and 7500 K, and more preferably about 6000 K; and wherein the individual light sources at least one further area ( 12 . 13 ) are provided such that this further areas can emit a white light with a color temperature between 2500 K and 4000 K, preferably between 3000 K and 3500 K, and more preferably of about 3000 K.
  32. Lighting device ( 10 ) according to one of the preceding claims, wherein the individual light sources of at least one area ( 12 . 13 ) of the light source ( 11 ) such that this region can emit light having a peak wavelength between about 580 and 670 nm.
  33. Lighting device ( 10 ) according to one of the preceding claims, wherein the individual light sources of at least one area ( 12 . 13 ) of the light source ( 11 ) are provided such that this region can emit light having a peak wavelength between about 390 and 480 nm.
  34. Lighting device ( 10 ) according to one of the preceding claims, wherein the individual light sources of at least one area ( 12 . 13 ) of the light source ( 11 ) are provided such that this region can emit light having a peak wavelength between about 480 and 560 nm.
  35. Lighting device ( 10 ) according to one of the preceding claims, wherein the individual light sources of at least one area ( 12 . 13 ) of the light source ( 11 ) are provided such that this region can emit light having a peak wavelength between 560 and 630 nm.
  36. Lighting device ( 10 ) according to one of the preceding claims, wherein the lighting device ( 10 ) at least two flat, matrix-like constructed light sources ( 11 ), which are substantially alignable to the same illumination field.
  37. Lighting device ( 10 ) according to claim 36, wherein two flat, matrix-like light sources ( 11 ) have an inverted arrangement of the individual light sources.
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DE202015105853.5U DE202015105853U1 (en) 2015-11-04 2015-11-04 lighting device
AT3872015U AT16507U1 (en) 2015-11-04 2015-12-22 lighting device
EP16815725.3A EP3371511A2 (en) 2015-11-04 2016-11-02 Lighting device
PCT/EP2016/076345 WO2017076861A2 (en) 2015-11-04 2016-11-02 Lighting device

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AT16507U1 (en) 2019-11-15
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