WO2017076861A2

WO2017076861A2 - Lighting device

Info

Publication number: WO2017076861A2
Application number: PCT/EP2016/076345
Authority: WO
Inventors: Stephan Ebner
Original assignee: Zumtobel Lighting Gmbh
Priority date: 2015-11-04
Filing date: 2016-11-02
Publication date: 2017-05-11
Also published as: AT16507U1; EP3371511B8; EP3371511A2; DE202015105853U1; WO2017076861A3; EP3371511B1

Abstract

The invention relates to a lighting device (10), in particular a spotlight lighting device, comprising at least one planar light source (11) having a matrix-type structure and multiple individual light sources (12, 13), each light source being suitable for emitting light of a defined wavelength. At least one first region (12) having at least one individual light source and a second region (13) having at least one individual light source can be controlled independently of one another; and the individual light sources of the at least two regions (12, 13) are configured to emit light at differently defined wavelengths.

Description

lighting device

Field of the invention

The present invention relates to a lighting device, in particular a spotlight lighting device.

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. Further are

Luminous devices are known in which the light source is not formed statically, but can be controlled independently of each other in certain areas of the light source, thereby characterized the

Radiation characteristic of the lighting device can be changed.

In the light of this prior art, it is the task of the present

Invention, a lighting device, in particular a spotlight lighting device to provide, 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 ones

Claims further form the central idea of the present invention in a particularly advantageous manner.

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 be a so-called center beam

provide, which can be surrounded by the light output of the individual light sources in the outer region. Alternat ™ for forming the second area as the first area completely surrounding area, it is possible to surround the inner area of the light source through multiple outer areas 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 in

Essentially emit light with the same defined wavelength, it being preferred in this context that the individual light sources of a

Composite are arranged distributed over the light source. As a result, the possibility already exists through the arrangement of the individual light sources

Mixing of the respectively emitted light of the individual light sources to be able to provide, so that depending on the application can be dispensed with a downstream mixing arrangement, if necessary.

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 assembly may include, for example, converging lenses or reflector arrays to form a directional and collimated one

To be able to provide light output by the lighting device.

The individual light sources of the light source can be designed, for example, as LED light sources, with it being possible to use individual LEDs or chip-on-board LEDs in this regard. The use of LED light sources makes it possible in a simple way to provide individual light sources which can emit light with differently defined wavelengths.

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. Alternate ^IV or in addition to this can be at least two strands

different areas are supplied by a channel of a converter unit with energy, wherein between the at least two strands one, preferably floating, 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 parallel to each other interconnected serial strands of a range

be set differently in terms of their light intensity.

The adjustable resistor can be provided by a mechanically adjustable potentiometer, which is preferably adjustable by a controllable actuator. Alternat ™ provides the ability to provide adjustable resistance through a drivable digital potentiometer that can be controlled or adjusted, for example, via a touch 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 preferred is the adjustable resistor by a

Resistor cascade provided, which can be controlled by a microcontroller, preferably by the microcontroller control a reed circuit is controlled.

Preferably, a control unit for driving the adjustable

Resistor, which is preferably integrated in the converter unit, provided, wherein the control of the adjustable resistor is preferably provided by means of a signal over-power drive.

Preferably, in addition to the adjustable resistor at least one

Fixed resistor provided in at least one strand of an area. It is preferred that the fixed resistor or the fixed resistors are selected such that they are the adjustable resistor or the adjustable

Resist in a neutral position, i. that the

Fixed resistor or the fixed resistors represent a consumer of the same size 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 thus possible to use the same current in all parallel strings

Furthermore, this makes it possible to select the "JSleutralstellung" such that in the adjustable resistor or in the adjustable resistors, a mean resistance value is provided , so the load is the consumer can be displaced in one or the other direction by the adjustable resistor or by the adjustable resistors, so that the current and thus the proportion of light in the respective strands, higher or lower can be adjusted. When providing the adjustable resistor through a resistor cascade, it is particularly preferred that the

Fixed resistance about one-third of that in the resistor cascade

corresponds to the highest resistance.

Alternat ™ or in addition to the use of LED light sources as

Single light sources there is the possibility of the light source through a

To provide 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.

Alternat ™ for forming the light source by means of the LED light sources or as an OLED matrix, it is possible, the light source through a

To provide 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 a secondary

Gives off light spectrum. Herein can be used phosphors are, for example, ZnS, ZnSe, CdS, CdSe, ZnTe, CdTe), silicates (Ca ₃ Sc ₂ Si ₃ 0 _12: Ce3 +), ortho silicates (BOSE), garnets (YAG: Ce3 ^+, (YGd ) AG: Ce3 ⁺ , LuAG: Ce3 ⁺ ), oxides (CaSc0 ₂ : Eu ²⁺ ), SiALONs (a-SiAlON: Eu ²⁺ , b-SiAlON: Eu ²⁺ ), nitrides

(La ₃ Si ₆ N _n: Ce3 ^+, _CaAlSiN3: Ce3 ^+), oxy-nitrides (SrSi ₂ N ₂ 0 _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 applied to the respective cells by means of a micromirror arrangement

Color conversion matrix directed. 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 shown that a flicker and smooth image at a

Frequency of about 200 Hz can be provided, for applications for film cameras preferably higher frequencies up to 1000 Hz are used.

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, can confine certain cells to them

comprise aligned laser beam. This makes it possible to control certain or all cells at the same time.

Alternat ^IV for deflecting a laser beam or assigning a

Laser beam to a cell of the color conversion matrix, the

Possibility to arrange the color conversion matrix itself so movable in the lighting device, that the respective cells of the

Color conversion matrix provided in at least one fixed

Laser beam are movable. For example, such mobility of the color conversion matrix may be by one or more

piezoelectric or electromagnetic actuators are provided. Such actuators may for example be connected to the edge regions of the color conversion matrix, so that the

Color conversion matrix can be moved freely accordingly.

Preferably, the individual light sources are at least a portion of

Provided light source such that this area can deliver a white light with a color temperature between 4500 K and 800 K, preferably between 5000 K and 7500 K and more preferably of about 6000 K; and wherein the individual light sources of at least one further area are provided such that this further area has a white light with a white light Color temperature between 2500 K and 4000 K, preferably between 3000 K and 3500 K and more preferably from about 3000 K can deliver. There is the possibility that the lighting device between a

warm white light and a cold white white light can be adjusted or that appropriate light mixtures can be provided.

Preferably, the individual light sources are at least a portion of

Light source provided such that this area can emit red light with a peak wavelength between 580 and 670 Nm, wherein preferably the individual light sources at least one further area are provided such that this area can deliver blue light with a peak wavelength between 390 and 480 Nm, wherein the individual light sources of at least one further region of the light source are preferably provided such that this region can emit green light with a peak wavelength between about 480 and 560 Nm, the individual light sources of at least one further region of the light source preferably being provided such that this region is yellowish 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

It is also possible to connect only certain peak wavelengths through the individual light sources of the respective areas

provide so that the lighting device in a light

can deliver 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

teaching area. Through the use of at least two flat, light-emitting sources constructed in a matrix-like manner, which can essentially be aligned with the same illumination field (for example by means of a corresponding optics), an overall very homogeneous light pattern can be achieved by superposition of the two light outputs. 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 reversely arranged symmetrically on the light sources, so that a particularly advantageous

Overlay of the two light outputs results.

Description of preferred embodiments

Hereinafter, a detailed description of the figures will be given. It shows:

Figure l is a schematic view of a first embodiment of a lighting device according to the invention;

Figure 2 LED light sources, preferably in an inventive

Lighting device to be used;

Figure 3 is a schematic view of another embodiment of a lighting device according to the invention with an OLED matrix as the light source;

Figure 4 is 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;

Figure 5 is a schematic view of two light sources, as they are preferably used in a lighting device according to the invention;

Figure 6 is a schematic view of different light sources, as they can be used in a preferred embodiment of a lighting device according to the invention;

Figure 7 is 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;

Figure 9 is a schematic view of another preferred

Embodiment of a lighting device according to the invention;

Figure IO is a schematic view of another preferred

Embodiment of a lighting device according to the invention; Figure Ii is a schematic view of a preferred interconnection of the individual light sources of a range;

Figure 12 is a schematic view of an adjustable resistor in the form of an adjustable potentiometer;

Figure 13 is a schematic view of a preferred interconnection of

Light source;

Figure 14 is a schematic view of an adjustable resistor in the form of a resistor cascade with a microcontroller control;

Figure 15 is a schematic view of a preferred interconnection of

Light source with a built-in converter microcontroller circuit of the adjustable resistor;

Figure 16 is a schematic view of a preferred interconnection of

Light source with a separate microcontroller circuit of the adjustable resistor;

Figure 17 is a schematic view of an interconnection of two light sources with a four-channel converter and two adjustable resistors;

Figure 18 is a schematic view of an interconnection of a light source with at least one fixed resistor.

Figure 1 shows a schematic view of a first preferred

Embodiment of a lighting device 10 according to the invention with a flat, matrix-like constructed light source 11, which is arranged in front of an optical element 15 (preferably a lens arrangement).

In this case, the light source 11 comprises an inner region 12 and, in the preferred embodiment shown, four outer regions 13. The regions 12, 13 shown in FIG. 1 can be individual light sources (for example LED light sources), a plurality of individual light sources and / or a multiplicity of interconnected ones Represent individual light sources.

The preferred embodiment shown represents a so-called center-beam arrangement, in which an inner region of the light source 11 with a or more surrounding areas of the light source is arranged. The respective regions of the light source can be controlled independently of each other, so that the one shown on the right

Illuminations (see reference numeral 20) can be adjusted. As in figure

1 can be clearly seen, with a lighting device 10 according to the invention a symmetrical and asymmetrical emission with

be provided different lighting priorities.

FIG. 2 shows a schematic view of two light sources 11 ¹ , which are shown in FIG

Light source 11 ¹ illustrated in FIG. 2 comprises individual LED light sources which can be arranged, for example, on a common board, whereas the right-hand light source u ¹¹ shown in FIG. 2 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).

FIG. 3 shows a schematic view of another preferred embodiment

Embodiment of a lighting device 10 ¹¹¹ according to the invention, wherein in contrast to the embodiments shown in Figures 1 and 2, an OLED matrix II ^{m is} used as the light source. The OLED matrix n ^m is designed such that the individual pixels / cells of the OLED matrix ιι ^{ΠΙ are} independently controllable.

FIG. 4 shows a further preferred embodiment of a

Lighting device according to the invention io ^IV , which comprises two light sources u ^w . The optical arrangement 15 ™ is designed such that the two light sources n ^{IV can be} aligned substantially on the same illumination field, so that the light emitted by the light sources n ^IV light can be superimposed accordingly. In order to provide the most homogeneous possible light field, it is particularly preferred that the light sources n ^{w have} a mirrored or inverted arrangement of the individual light sources, so that as far as possible a "spot-free" image is provided.

FIG. 5 shows a schematic view of two more or less complex light sources n ^v , n ^VI . The light sources n ^v , 11 ^ shown in FIG. 5 can already have a comparatively homogeneous size because of their size Provide light output. The light field n ^{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 is surrounded} by an outer region 13 ^V. In contrast, the light field 11 ^ has areas which are formed by a combination of a plurality of individual light sources

are provided which emit substantially light of the same defined wavelength (in Figure 5, these are each provided with identical hatching). As can be clearly seen in FIG. 5, the individual light sources of a respective composite are arranged distributed over the light source 11, so that a comparatively good mixing of the emitted light already results from the arrangement of the individual light sources.

FIG. 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 shown for a

Lighting device, a particularly advantageous, homogeneous light output can be provided by the lighting device. The arrangements shown are particularly preferably used for different luminaire geometries (for example, elongated luminaires, wall or ceiling spotlights, spotlight lighting, etc.). Preferably, the respective light sources shown in Figure 6 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.

FIG. 7 shows a schematic view of another preferred embodiment

Embodiment of a lighting device io ^vn , wherein the light source is provided by a light source matrix in the form of a color conversion matrix ιο ^ ¹ . The individual light sources are provided by the cells of the color conversion matrix ιο ^ ¹ . The cells each comprise a phosphor which can be excited by means of a laser beam (preferably a blue laser beam) of a laser arrangement 26 ^VI1 for secondary ^{light output} . In the cells of the color conversion matrix n ^ ¹ can be green, yellow or red

Be contained phosphor or a mixture thereof. In the preferred embodiment shown, the lighting device ιο ^ ¹ further comprises a micromirror arrangement 25 ^vn , with which the laser beam on the

different cells of the color conversion matrix n ^ ¹ can be deflected. The laser beam is preferably a blue emitting laser, the stimulate the phosphors contained in the cells accordingly. The micromirror arrangement 25 ^vn is designed such that it has 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 ii ^w can judge.

Figure 8 shows a schematic view of another embodiment of a lighting device according to the invention io ^vin, wherein a plurality of laser assemblies 26 are disposed ^vni stationary in contrast to the embodiment shown in figure 7 embodiment, and are aligned in such a way that this particular on one or on cells of the color conversion matrix ιο ^ ^{11 are} directed. In addition to the stationary laser arrangements 26 ^vni shown in FIG. 8, a laser arrangement such as 26 ^vn can also be used with a micromirror arrangement 25 ^vn (see FIG. Alternatively, it is possible to assign a single laser to each cell of the color conversion matrix n ¹¹ , so that a micromirror arrangement 25 ^vn could be completely dispensed with. Such a system can drive in parallel all cells of the color conversion matrix n ^ ¹¹ .

FIG. 9 shows a further preferred embodiment of a

Lighting device according to the invention io ^Ix . In contrast to the light-emitting devices shown in FIGS. 7 and 8, FIG

Color conversion matrix n ^IX arranged to be movable in this embodiment, in such a way that the cells of the color conversion matrix n ^{IX can be moved} into a fixed laser of a laser array 26 ^IX . The color conversion matrix io ^IX is preferably for this purpose by means of

piezoelectric or electromagnetic actuators 30 ^{IX formed} movable.

FIG. 10 shows a further embodiment of a preferred embodiment

Lighting device io ^x , the light source turn as

Color conversion matrix n ^{x is} provided. In contrast to the embodiments shown in FIGS. 1 to 9, this embodiment furthermore comprises a mixing chamber i6 ^x downstream from the light source

Homogenization of each emitted from the individual light sources light. Such a mixing chamber i6 ^x can be used in all shown embodiments of the lighting device. FIG. 11 shows an exemplary interconnection of a region of a

Device according to the invention by means of a single-channel converter 50. In this embodiment, all respective regions of a planar, light source 11 constructed in a matrix-like manner are connected by means of a preferably controllable,

Converter 50 operated. As can be seen in Figure 11, the

Single light sources of a respective area as mutually parallel connected serial strings provided and thus jointly controllable.

Figure 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 can be clearly seen in FIG. 12, the respective inner regions 12 of the light sources are in each case of the respective outer regions 13 of the light sources by an adjustable resistor 60, which in each case in the

Parallel circuits integrated, disconnected. Due to the adjustable

Resistors 60, the load in the parallel strands can be shifted so that the respective strands are supplied with more or less power, so that the light intensity of the inner and outer regions 12, 13 can be controlled independently of each other or each. FIG. 12 is merely intended to show how individual regions of the light source or respective strands of the light source can be adjusted independently of one another by means of an adjustable resistor 60. In another

Embodiment, each adjustable light source strand can be assigned an adjustable resistance, so that all light source strands can be set arbitrarily and differently to each other. As can be seen in FIG. 12, in this embodiment the converter 50 is designed as a two-channel converter, which can control the respective light fields independently of one another. For lighting devices with more

Light sources, can be used according to multi-channel converter or multiple single-channel converter.

Figure 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, there is also the possibility of controllable digital

Potentiometers (so-called electronic potentiometer) use, in the form of a transistor circuit or a microcontroller circuit can be executed. 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 retains a set value or can be a setting of the digital potentiometer via buttons, an incremental encoder or a microcontroller. The latter usually have a volatile and / or a non-volatile memory for the hit

Settings. Also, other electronic variants of

variable resistors are used, for example, 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 raA.

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 (i.e., the number of resistors and the respective resistance values) can be adjusted 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.

FIG. 14 shows by way of example a microcontroller circuit with a memory which can control one or more reed switches (RSi to RS3) and thereby set the, preferably potential-free, resistor cascade (Ri to R3) as required. Figure 15 shows an example of a microcontroller circuit, which in a

Converter is integrated and the corresponding switch (RSi ...) can control to switch a resistor cascade (Ri ...) accordingly.

FIG. 16 shows a schematic view of another

Verschaltungsmöglichkeit, where the microcontroller circuit in

Difference to the microcontroller circuit shown in Figure 15 is designed as a separate component.

Figure 17 shows an exemplary wiring arrangement for two light sources whose respective areas are provided by two adjustable resistors provided by a microcontroller circuit driving the respective resistor cascades. In the embodiment shown in FIG. 17, the converter is a four-channel converter, wherein in FIG. 16 an interconnection for a signal overpower control of the microcontroller circuit is shown by way of example.

FIG. 18 shows an exemplary interconnection in which at least one

Fixed resistor 0, ^ 4 ") in one of the LED strands (here for the inner region of a light source) is provided by the fixed resistor" R4 "shown is the possibility 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 load the load through or through the adjustable resistor in one or the other

To move 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 found that the value of the fixed resistor "R4" is preferably one third of the highest resistance in the cascade, and the present invention is not the preceding one

Embodiments are limited, as long as it is an object of the following claims. Further, the previous ones

Embodiments in any way with and can be combined with each other.

Claims

- 1 -

protection claims

Lighting device (10), in particular a spotlight lighting device, comprising:

at least one planar, matrix-like constructed light source (11), which comprises 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

Single light source and a second area (13) 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 (12, 13) are arranged to emit light with differently defined wavelengths.

Lighting device (10) according to claim 1, wherein the individual light sources of the light source (11) are arranged point and / or mirror-symmetrically.

A lighting device (10) according to any 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 region surrounding the inner region.

A lighting device (10) according to any one of claims 1 or 2, wherein the first region (12) of the light source (11) is an inner region surrounded by a plurality of outer regions (13) of the light source (11).

A lighting device (10) according to any one of claims 1 or 2, wherein the regions are provided by a composite of a plurality of individual light sources which emit substantially light of the same defined wavelength.

Lighting device (10) according to claim 5, wherein the individual light sources of a composite are distributed over the light source (11).

Lighting device (10) according to one of the preceding claims, wherein at least one optical arrangement (15) and / or a mixing arrangement (16) is provided in the emission direction of the light source (11) behind the light source (11). - 2 -

8. lighting device (ιο) according to claim 7, wherein the optical arrangement (15) comprises a converging lens or a reflector assembly.

9. lighting device (10) according to any one of the preceding claims, wherein the individual light sources of the light source (11) are LED light sources, in particular provided by individual LEDs or by chip-on-board LEDs.

10. Lighting device (10) according to any one of the preceding claims, wherein the light source (11) are LED light sources, which are formed as a chip-scale package or as a 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 strand or as a parallel interconnected serial strands and are jointly controlled.

12. The 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) are energized.

13. Lighting device (10) according to any 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 one, preferably potential-free, adjustable Resistor (60) is arranged.

14. A 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 controllable digital potentiometer. - 3 -

The lighting device (10) of claim 13, wherein the adjustable resistor (60) is provided by a resistor cascade having a microcontroller controlling a reed circuit.

Lighting device (10) according to any one of claims 13 to 17, wherein a control unit for driving the adjustable resistor (60), which is preferably integrated in the converter unit (50) is provided, wherein the drive of the adjustable resistor (60) is preferably a signal - Over-power control is.

Lighting device (10) according to any one of claims 13 to 18, wherein in addition to the adjustable resistor (60) at least one fixed resistor (R4) in at least one strand of a region (12, 13) is provided.

Lighting device (10) according to claim 17 and 19, wherein the value of the

Fixed resistance (R4) corresponds to about 1/3 of the highest resistance provided in the resistor cascade.

Lighting device (10) according to any one of the preceding claims, wherein the light source (11) is provided by a light source matrix in the form of an OLED matrix.

Lighting device (10) according to one of the preceding claims, wherein the light source (11) by a light source matrix in the form of a

Color conversion matrix is provided, 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) for

Secondary light output is excitable.

A lighting device (10) according to claim 22, wherein in the cells of

Color conversion matrix green, yellow or red phosphor or a mixture thereof is included.

Lighting device (10) according to claim 23, wherein the phosphor is preferably an inorganic phosphor or a Quantumdot, which is preferably excited by means of a blue laser beam for secondary light output. - 4 -

Lighting device (10) according to any one of claims 22 to 24, wherein the at least one laser beam is directed by means of a micromirror arrangement (25) on the respective cells of the color conversion matrix.

Lighting device (10) according to claim 25, wherein the micromirror arrangement (25) is directed onto the cells at a frequency between 30 and 1000 Hz, preferably between 50 and 200 Hz.

Lighting device (10) according to any one of claims 22 to 24, wherein each cell is associated with a fixed laser beam directed to this.

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) can be directed to specific cells of the color conversion matrix and at least one further laser beam is fixedly associated with a cell.

Lighting device (10) according to any one of claims 22 to 24, wherein the color conversion matrix is arranged so movable in the lighting device (10), that the respective cells of the color conversion matrix are movable in at least one stationary laser steel.

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.

Lighting device (10) according to any one of the preceding claims, wherein the individual light sources at least one area (12, 13) of the light source (11) are provided such that this area a white light with a color temperature between 4500 K and 8000 K, preferably between 5000 K and Can deliver 7500 K and more preferably of about 6000 K; and where the

Individual light sources at least one further area (12, 13) are provided such that this further areas can deliver 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.

Lighting device (10) according to one of the preceding claims, wherein the individual light sources at least a portion (12, 13) of the light source (11) in such a way It is provided that this region can emit light having a peak wavelength between about 580 and 670 nm.

33. A lighting device (10) according to one of the preceding claims, wherein the individual light sources of at least one region (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 any one of the preceding claims, wherein the individual light sources at least a portion (12, 13) of the light source (11) are provided such that this range 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 at least one region (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, constructed in a matrix-like manner

Includes light sources (11) which are aligned substantially on the same illumination field.

37. Lighting device (10) according to claim 36, wherein two flat, matrix-like constructed light sources (11) an inverted arrangement of

Have individual light sources.