High brightness light source comprising a blue laser pumping a green / yellow phosphor and a yellow / orange superluminescent diode pumping a red phosphor

Abstract

The invention provides a light generating system (1000) comprising (i) a plurality of light sources (110, 120,...), (ii) a first luminescent material (210) and (iii) a second luminescent material (220), wherein: (a) a first light source (110) is configured to generate first light source light (111) having one or more wavelengths in a blue wavelength range and having a first centroid wavelength (λC1), wherein the first light source (110) is a laser; (b) the first luminescent material (210) is configured to convert at least part of the first light source light (111) into first luminescent material light (211) having one or more wavelengths in a green and / or yellow wavelength range; (c) a second light source (120) is configured to generate second light source light (121) having one or more wavelengths in a yellow and / or orange wavelength range and having a second centroid wavelength (λC2), wherein λC2> λC1; wherein the second light source (120) is a superluminescent diode; (d) the second luminescent material (220) is configured to convert at least part of the second light source light (121) into second luminescent material light (221) having one or more wavelengths in an orange and / or red wavelength range; and (e) in an operational mode, the light generating system (1000) is configured to generate system light (1001) comprising the first luminescent material light (211) and the second luminescent material light (221).

Description

Technical Field

[0001] The present invention relates to a light generation system and a light generation device including such a light generation system. Background Technology

[0002] White light sources using laser diodes and phosphors are known in the art. For example, US2018 / 0316160 describes an apparatus and method for an integrated white electromagnetic radiation source using a combination of a gallium- and nitrogen-based laser diode excitation source and a phosphor-based emission source. Gallium- and nitrogen-based violet, blue, or other wavelength laser diode sources can be tightly integrated with phosphor materials such as yellow phosphors to form a compact, high-brightness, and efficient white light source. The phosphor material is provided with multiple scattering centers etched on the excitation surface or internal block of a plate to scatter electromagnetic radiation from a laser beam incident on the excitation surface from the excitation source, thereby enhancing the generation and quality of light emitted from the phosphor material for outputting white light emission in either reflection or transmission mode. Summary of the Invention

[0003] Although white LED sources can provide, for example, up to approximately 300 lm / mm² 2 The intensity; static phosphor-converted white laser sources can provide even higher intensity, up to approximately 20,000 lm / mm. 2 The intensity of the light emission is high. Ce-doped garnet (e.g., YAG, LuAG) is the most suitable light-emitting converter, which can be used for blue laser pumping because the garnet matrix has very high chemical stability. Furthermore, at low Ce concentrations (e.g., below 0.5%), temperature quenching can occur only above about 200°C. Additionally, Ce emission has a very fast decay time, thus optical saturation is essentially avoided. Assuming, for example, reflective mode operation, the blue laser can be incident on the phosphor. In the embodiments, this allows for almost complete conversion of the blue light, resulting in the emission of the converted light. It is for this reason that garnet phosphors with relatively high stability and thermal conductivity are recommended. However, other phosphors can also be applied. When using extremely high power densities, thermal management may still be an issue.

[0004] High-brightness light sources can be used in applications such as projection, stage lighting, spotlights, and automotive lighting. For this purpose, laser phosphor technology can be used, where a laser provides the laser beam, and a phosphor, for example (remotely), converts the laser beam into converted light. In embodiments, the phosphor can be positioned on or inserted into a heat sink to improve thermal management and thus achieve higher brightness.

[0005] It is desirable for high-intensity light generating devices and / or light generating devices to have a controllable spectral power distribution of the light generated by the light generating device. In addition, it is desirable to reduce heat generation.

[0006] A completely laser-based solution may result in a color rendering index (CRI) lower than the desired spectral power distribution. Furthermore, solutions based on laser-emitting materials may require the use of materials with relatively large Stokes shifts, and consequently, relatively large heat generation. Additionally, not all laser wavelengths are suitable for high intensity (and / or efficiency).

[0007] Therefore, one aspect of the present invention is to provide an alternative light generation system that preferably further eliminates at least partially one or more of the aforementioned disadvantages. The object of the present invention may be to overcome or improve upon at least one of the disadvantages of the prior art, or to provide a useful alternative.

[0008] In a first aspect, the present invention provides a light generation system (“system”) comprising (i) a plurality of light sources, (ii) a first luminescent material, and (iii) a second luminescent material. Specifically, in embodiments, the first light source (of the plurality of light sources) can be configured to generate first light source light, particularly first light source light having one or more wavelengths in the blue wavelength range. Furthermore, the first light may have a first centroid wavelength (λ). C1 Specifically, in embodiments, the first light source may include a laser. Furthermore, in embodiments, a first luminescent material may be configured to convert at least a portion of the light from the first light source into first luminescent material light; in other embodiments, particularly, the first luminescent material light may have one or more wavelengths in the green and / or yellow wavelength range. Specifically, in embodiments, a second light source (among a plurality of light sources) may be configured to generate second light source light, particularly a second light source having one or more wavelengths in the yellow and / or orange wavelength range. Furthermore, the second light may have a second centroid wavelength (λ). C2 Specifically, in the embodiments, λ C2 >λ C1Furthermore, in embodiments, the second light source may include a superluminescent diode. Furthermore, in embodiments, the second luminescent material may be configured to convert at least a portion of the light from the second light source into second luminescent material light; in other embodiments, particularly, second luminescent material light having one or more wavelengths in the orange and / or red wavelength range. Furthermore, in embodiments, in the operating mode of the (light generation system), the light generation system may be configured to generate system light comprising first luminescent material light and second luminescent material light. Therefore, in embodiments, the present invention provides a light generation system comprising (i) a plurality of light sources, (ii) a first luminescent material, and (iii) a second luminescent material, wherein: (a) the first light source is configured to generate light having one or more wavelengths in the blue wavelength range and having a first centroid wavelength (λ). C1 (a) a first light source, wherein the first light source is a laser; (b) a first luminescent material is configured to convert at least a portion of the first light source light into first luminescent material light having one or more wavelengths in the green and / or yellow wavelength range; and (c) a second light source is configured to generate light having one or more wavelengths in the yellow and / or orange wavelength range and having a second centroid wavelength (λ). C2 The second light source, λ C2 >λ C1 (d) The second light source is a superluminescent diode; the second luminescent material is configured to convert at least a portion of the light from the second light source into light of the second luminescent material having one or more wavelengths in the orange and / or red wavelength range; and (e) in the operating mode, the light generation system is configured to generate system light comprising light of the first luminescent material and light of the second luminescent material.

[0009] Such a system can provide white light with relatively high intensity. Furthermore, it can provide (white) light with a controllable color point and / or controllable correlated color temperature (CCT) and / or controllable color rendering index (CRI). Additionally, thermal management can be improved using such a system compared to, for example, using a single blue-pumped light source. Moreover, a relatively small device can be provided that is capable of providing light with relatively high intensity.

[0010] As described above, the light generation system includes multiple light sources. The term "light source" can also refer to multiple light sources, such as 2-200 (solid-state) LED light sources. Therefore, the term LED can also refer to multiple LEDs. Furthermore, in embodiments, the term "light source" can also refer to a so-called chip-on-board (COB) light source. The term "COB" specifically refers to LED chips in the form of semiconductor chips that are neither packaged nor connected, but directly mounted onto a substrate (such as a PCB). Therefore, multiple light semiconductor light sources can be configured on the same substrate. In embodiments, a COB is a multi-LED chip configured together as a single lighting module.

[0011] A light source has a light-escape surface. Referring to conventional light sources such as light bulbs or fluorescent lamps, this can be the outer surface of a glass or quartz enclosure. For example, for an LED, it can be the LED die, or, when resin is applied to the LED die, it can be the outer surface of the resin. In principle, it can also be the end of an optical fiber. The term "escape surface" specifically refers to that part of the light source, i.e., the place where light actually leaves the light source or escapes from it. The light source is configured to provide a beam of light. This beam of light escapes from the light-escape surface of the light source.

[0012] The term "light source" can refer to semiconductor light-emitting devices, such as light-emitting diodes (LEDs), resonant cavity light-emitting diodes (RCLEDs), vertical cavity laser diodes (VCSELs), edge-emitting lasers, etc. The term "light source" can also refer to organic light-emitting diodes, such as passive matrix (PMOLED) or active matrix (AMOLED). In certain embodiments, the light source includes solid-state light sources (such as LEDs or laser diodes). In one embodiment, the light source includes LEDs (light-emitting diodes). The term LED can also refer to multiple LEDs. Furthermore, the term "light source" in embodiments can also refer to so-called chip-on-board (COB) light sources. The term "COB" specifically refers to LED chips in the form of semiconductor chips that are neither packaged nor connected, but are directly mounted onto a substrate (such as a PCB). Therefore, multiple semiconductor light sources can be configured on the same substrate. In embodiments, a COB is a multi-LED chip configured together as a single lighting module.

[0013] The term "light source" can also refer to multiple (substantially identical (or different)) light sources, such as 2-2000 solid-state light sources. In embodiments, a light source may include one or more micro-optical elements (microlens arrays) downstream of a single solid-state light source (such as an LED) or downstream of multiple solid-state light sources (i.e., shared by multiple LEDs). In embodiments, a light source may include LEDs with on-chip optics. In embodiments, a light source includes pixelated individual LEDs (with or without optics) (providing on-chip beam steering in embodiments).

[0014] The term "laser source" specifically refers to a laser. Such a laser can be specifically configured to generate laser light having one or more wavelengths in the UV, visible, or infrared range, particularly wavelengths selected from the spectral wavelength range of 200-2000 nm, such as 300-1500 nm. The term "laser" also specifically refers to a device that emits light through an optical amplification process based on stimulated emission of electromagnetic radiation.

[0015] Specifically, in embodiments, the term "laser" may refer to a solid-state laser. In certain embodiments, the term "laser" or "laser source" or similar terms refer to a laser diode (or diode laser).

[0016] Therefore, in the embodiments, the light source includes a laser light source. In the embodiments, the term "laser" or "solid-state laser" may refer to one or more of the following: cerium-doped lithium strontium (or calcium) aluminum fluoride (Ce:LiSAF, Ce:LiCAF), chromium-doped chrysoberyl (alexandrite) laser, chromium ZnSe (Cr:ZnSe) laser, divalent samarium-doped calcium fluoride (Sm:CaF2) laser, Er:YAG laser, erbium-doped and erbium-ytterbium co-doped glass lasers. Optical devices, F-Center lasers, holmium YAG (Ho:YAG) lasers, Nd:YAG lasers, NdCrYAG lasers, neodymium-doped calcium yttrium oxyborate Nd:YCa4O(BO3)3 or Nd:YCOB, neodymium-doped yttrium orthovanadate (Nd:YVO4) lasers, neodymium glass (Nd:glass) lasers, neodymium YLF (Nd:YLF) solid-state lasers, promethium-doped 147 phosphate glass (147Pm) 3+ Solid-state lasers (Al2O3:Cr) and ruby ​​lasers (Al2O3:Cr) 3+ ), Thulium YAG (Tm:YAG) laser, Titanium Sapphire (Ti:Sapphire; Al2O3:Ti) 3+ Lasers, including trivalent uranium-doped calcium fluoride (U:CaF2) solid-state lasers, ytterbium-doped glass lasers (rods, plates / chips and fibers), ytterbium YAG (Yb:YAG) lasers, and Yb2O3 (glass or ceramic) lasers.

[0017] In the embodiments, the term "laser" or "solid-state laser" may refer to one or more semiconductor laser diodes, such as GaN, InGaN, AlGaInP, AlGaAs, InGaAsP, lead salt, vertical-cavity surface-emitting laser (VCSEL), quantum cascade laser, hybrid silicon laser, etc.

[0018] Lasers can be combined with upconverters to achieve shorter wavelengths. For example, upconversion can be achieved using some (trivalent) rare-earth ions, or downconversion can be achieved using nonlinear crystals. Alternatively, lasers can be combined with downconverters (e.g., dye lasers) to achieve longer wavelengths.

[0019] As can be seen from the following, the term "laser source" can also refer to multiple (different or identical) laser sources. In a particular embodiment, the term "laser source" can refer to N multiple (identical) laser sources. In an embodiment, N=2 or greater. In a particular embodiment, N can be at least 5, such as particularly at least 8. In this way, higher brightness can be obtained. In an embodiment, the laser sources can be arranged as a laser array (see also above). The laser array in an embodiment may include a heat sink and / or optics, such as lenses for collimating the laser.

[0020] The laser source is configured to generate laser light (or "laser beam"). The light source can consist essentially of laser light. It can also include laser light from two or more (different or identical) laser sources. For example, laser light from two or more (different or identical) laser sources can be coupled into a light guide to provide a single beam comprising laser light from two or more (different or identical) laser sources. In a particular embodiment, the light source is therefore specifically collimated. In yet another embodiment, the light source is specifically (collimated) laser light. The phrase "different sources" or "multiple different sources" and similar phrases in embodiments can refer to multiple solid-state sources selected from at least two different bins. Similarly, the phrase "identical sources" or "multiple identical sources" and similar phrases in embodiments can refer to multiple solid-state sources selected from the same bin.

[0021] The light source is specifically configured to generate light with an optical axis (O), beam shape, and spectral power distribution. In embodiments, the light source light may include one or more bands having bandwidths known to the laser. In particular embodiments, the bands may be relatively sharp lines, such as having a full width at half maximum (FWHM) in the range of less than 20 nm (e.g., equal to or less than 10 nm) at RT. Thus, the light source light has a spectral power distribution (intensity on an energy scale according to wavelength), which may include one or more (narrow) bands.

[0022] The beam of light (from the light source) can be a focused or collimated beam of light from the (laser) source. The term "focused" can specifically refer to converging into a small spot. This small spot can be located at, or (slightly) upstream of, or (slightly) downstream of, the discrete converter region. In particular, focusing and / or collimation can be performed such that the cross-sectional shape of the beam (perpendicular to the optical axis) at the discrete converter region (on the side) is substantially no larger than the cross-sectional shape of the discrete converter region (perpendicular to the optical axis) (where the light source illuminates the discrete converter region). Focusing can be performed using one or more optical devices, such as (focusing) lenses. In particular, two lenses can be applied to focus the laser source light. Collimation can be performed using one or more (other) optical devices, such as collimating elements, such as lenses and / or parabolic mirrors. In embodiments, the (laser) source beam can be relatively highly collimated, such as ≤2° (FWHM) in embodiments, more particularly ≤1° (FWHM), and most particularly ≤0.5° (FWHM). Therefore, ≤2° (FWHM) can be considered a (highly) collimated source. Optical devices can be used to provide (high) collimation (see also above).

[0023] Superluminescent diodes (SLEDs) are known in the art. A SLED can be represented as a semiconductor device that can emit a broad spectrum of low-coherence light like an LED, while possessing brightness on par with a laser diode. For example, US2020192017 states that "with current technology, a single SLED is capable of emitting with sufficient spectral flatness and sufficient output power, for example, in a wavelength range of 800-900 nm, over a bandwidth of up to 50-70 nm. In the visible light range used for display applications, i.e., in the wavelength range of 450-650 nm, a single SLED is capable of emitting with current technology over a bandwidth of up to 10-30 nm. These emission bandwidths are too small for display or projector applications requiring red (640 nm), green (520 nm), and blue (450 nm) (i.e., RGB) emission." In addition, Szymon Stanczyk, Anna Kafar, Dario Schiavon, Stephen Najda, Thomas Slight, Piotr Perlin, and book editors Fabrizio Roccaforte and Mike Leszczynski describe superluminescent diodes in “Edge Emitting Laser Diodes and Superluminescent Diodes” (first published: August 3, 2020, https: / / doi.org / 10.1002 / 9783527825264.ch9, Chapter 9.3, Superluminescent Diodes). This book, especially Chapter 9.3, is incorporated herein by reference. For example, it states that a superluminescent diode (SLD) "is an emitter that combines the characteristics of a laser diode and a light-emitting diode. SLD emitters utilize stimulated emission, meaning that these devices operate at current densities similar to those of laser diodes. The main difference between an LD and an SLD is that, in the latter case, we design the device waveguide in a special way to prevent standing waves and laser formation. The presence of the waveguide still ensures the emission of a high-quality beam with high spatial coherence, but the light is characterized by low temporal coherence." It further states that "currently, the most successful designs for nitride SLDs are curved, curved, or tilted waveguide geometries and tilted faceted geometries, in which the waveguide front end intersects the device facet in a tilted manner, as shown in Figure 9.10. The tilted waveguide suppresses reflection of light from the facet to the waveguide by directing the light to the outside of the lossy unpumped region of the device chip." Therefore, an SLD can specifically be a semiconductor light source in which spontaneously emitted light is amplified by stimulated emission in the active region of the device. This emission is called "superluminescence." Superluminescent diodes combine the high power and brightness of laser diodes with the low coherence of traditional light-emitting diodes.The low (temporal) coherence of the light source has the advantage of significantly reduced or invisible speckle, and the emitted spectral distribution is much wider than that of laser diodes, making it more suitable for lighting applications.

[0024] The system may include at least a first light source and at least a second light source. The term "first light source" may refer to one or more first light sources. The term "second light source" may refer to one or more second light sources. The difference between the first light source and the second light source may be, in particular, the spectral power distribution. The former may have a spectral power distribution that is predominantly blue, while the latter may have a spectral power distribution that is predominantly yellow and / or orange.

[0025] The term "violet light" or "violet emission" specifically refers to light with wavelengths in the range of approximately 380-440 nm. The term "blue light" or "blue emission" specifically refers to light with wavelengths in the range of approximately 440-495 nm (including some violet and cyan hues). The term "green light" or "green emission" specifically refers to light with wavelengths in the range of approximately 495-570 nm. The term "yellow light" or "yellow emission" specifically refers to light with wavelengths in the range of approximately 570-590 nm. The term "orange light" or "orange emission" specifically refers to light with wavelengths in the range of approximately 590-620 nm. The term "red light" or "red emission" specifically refers to light with wavelengths in the range of approximately 620-780 nm. The term "pink light" or "pink emission" refers to light with blue and red components. The term "cyan" can refer to one or more wavelengths selected from the range of approximately 490-520 nm. The term "amber" can refer to one or more wavelengths selected from the range of about 585-605 nm, such as about 590-600 nm.

[0026] The phrase "light having one or more wavelengths within a wavelength range" and similar phrases can specifically indicate that the indicated light (or radiation) has a spectral power distribution having at least one or more intensities at those wavelengths within the indicated wavelength range. For example, a blue emitting solid-state light source will have a spectral power distribution with intensities at one or more wavelengths within the 440-495 nm wavelength range. In particular, a blue emitting solid-state light source having a spectral power distribution with intensities at one or more wavelengths within the 440-495 nm wavelength range can have a centroid wavelength (the centroid wavelength of the spectral power distribution) within such a wavelength range (i.e., the 440-495 nm wavelength range). Similarly, this also applies to similar phrases.

[0027] The terms “light” and “radiation” are used interchangeably herein unless the context clearly indicates that the term “light” refers only to visible light. Therefore, the terms “light” and “radiation” can refer to UV radiation, visible light, and IR radiation. In certain embodiments, particularly for lighting applications, the terms “light” and “radiation” refer to visible light.

[0028] Therefore, in embodiments, the first light source can be configured to generate light having one or more wavelengths in the wavelength range of 440-495 nm, particularly light having a (first) centroid wavelength and / or peak wavelength within that wavelength range. For example, in embodiments, the first light source can be configured to generate light having a centroid wavelength selected from the wavelength range of 440-495 nm. Therefore, in embodiments, the first centroid wavelength can be selected from the blue wavelength range.

[0029] However, in embodiments, the second light source can be configured to generate light having one or more wavelengths in the 570-620 nm wavelength range, particularly light having a (second) centroid wavelength and / or peak wavelength within that wavelength range. For example, in embodiments, the second light source can be configured to generate light having a centroid wavelength selected from the 570-620 nm wavelength range. Therefore, in embodiments, the second centroid wavelength can be selected from the yellow and / or orange wavelength range. The 570-620 nm wavelength range is referred to herein as the yellow and / or orange wavelength range.

[0030] Therefore, the peak wavelength (of the spectral power distribution) of the first light can be smaller than that of the second light. Alternatively or additionally, the centroid wavelength of the first light can be smaller than that of the second light.

[0031] The term "centroid wavelength" (also indicated as λc) is known in the art and refers to a wavelength value at which half of the light energy is at a shorter wavelength and half at a longer wavelength; this value is expressed in nanometers (nm). It is the wavelength at which the integral of the spectral power distribution is divided into two equal parts, as shown by the formula... This indicates that the sum is over the wavelength range of interest. It is the spectral energy density (i.e., the integral of the product of wavelength and intensity in the emission band, normalized to the integrated intensity). The centroid wavelength can be determined, for example, under operating conditions.

[0032] Furthermore, high-intensity and / or high-efficiency lasers can be more abundant in the blue wavelength range than in the yellow and / or orange wavelength range, while SLDs can also be available in the yellow and orange wavelength range. Therefore, it is proposed herein to use (i) a blue pump laser and (ii) a yellow and / or orange SLD in the embodiments.

[0033] Therefore, in an embodiment, the first light source can be configured to generate one or more wavelengths within the blue wavelength range (440-495 nm) and have a first centroid wavelength (λ). C1 The first light source is a laser. Specifically, in an embodiment, the first light source includes a laser. More specifically, in an embodiment, the first light source is a laser (optionally including optics). Therefore, specifically, the first light source includes a laser, and more specifically, the first light source can be a laser.

[0034] The phrase "having one or more wavelengths within a specific wavelength range" and similar phrases (such as "having one or more wavelengths within a blue wavelength range") do not necessarily include intensities that can also be found at wavelengths outside the specific wavelength range. For example, a green / yellow luminescent material (see also below) may, in embodiments, also have an intensity within the orange wavelength range. However, specifically, the indication may be an indication that light having one or more wavelengths within a specific wavelength range can also have a color associated with that wavelength range. Thus, for example, the centroid wavelength of light with one or more wavelengths within a specific wavelength range may be within that specific wavelength range.

[0035] Specifically, the first light source can be used to pump and emit green and / or yellow luminescent materials. This can provide a relatively small (Stokes) wavelength difference between the (first) pump wavelength and the (first) emission wavelength. Therefore, in embodiments, the first luminescent material can be configured to convert at least a portion of the light from the first light source into light having one or more wavelengths within the green and / or yellow wavelength range (495-590 nm). Furthermore, in embodiments, the first luminescent material can be configured to convert at least a portion of the light from the first light source into light having a peak wavelength within the green and / or yellow wavelength range. Alternatively or additionally, in embodiments, the first luminescent material can be configured to convert at least a portion of the light from the first light source into light having a centroid wavelength (λ) within the green and / or yellow wavelength range. CL1 The first luminescent material.

[0036] Therefore, also in this embodiment, the second light source can be configured to generate one or more wavelengths in the yellow and / or orange wavelength range and have a second centroid wavelength (λ). C2 The second light source is λ. Specifically, in the embodiment, λ is... C2 >λ C1 For example, in an embodiment, λ C2 -λ C1 ≥75nm, or even more specifically, λ C2 -λ C1 ≥100nm. Therefore, in a specific embodiment, 75nm≤λ C2 -λC1 ≤180nm, such as especially 90nm≤λ C2 -λ C1 ≤150nm. Specifically, in an embodiment, the second light source includes a superluminescent diode. More specifically, in an embodiment, the second light source is a superluminescent diode (optionally including optics). Therefore, specifically, the light from the second light source includes superluminescent diode light; more specifically, the light from the second light source is superluminescent diode light.

[0037] Specifically, the second light source can be used to pump an orange and / or red luminescent material. This can provide a relatively small (Stokes) wavelength difference between the (second) pump wavelength and the (second) emission wavelength. Therefore, in embodiments, the second luminescent material can be configured to convert at least a portion of the light from the second light source into light of the second luminescent material having one or more wavelengths within the orange and / or red wavelength range (590-780 nm, particularly 590-665 nm).

[0038] However, in embodiments, the second luminescent material may be configured to convert at least a portion of the second light source light into second luminescent material light having a peak wavelength in the orange and / or red wavelength range. Alternatively or additionally, the second luminescent material may be configured to convert at least a portion of the second light source light into second luminescent material light having a centroid wavelength in the orange and / or red wavelength range.

[0039] In one embodiment, the first luminescent material is disposed downstream of the first light source. Specifically, in another embodiment, the first luminescent material is not disposed downstream of the second light source and / or the second luminescent material. In another embodiment, the second luminescent material is disposed downstream of the second light source. Specifically, in another embodiment, the second luminescent material is not disposed downstream of the first light source and / or the first luminescent material.

[0040] The terms “upstream” and “downstream” refer to the arrangement of articles or features relative to the propagation of light from a light-generating component (here, in particular a light source), wherein a second position in the beam closer to the light-generating component is “upstream” relative to a first position within the beam from the light-generating component, and a third position in the beam farther from the light-generating component is “downstream”.

[0041] The terms "radiative coupling" or "optical coupling" can specifically refer to (i) a light-generating element (such as a light source) and (ii) another article or material associated with each other such that at least a portion of the radiation emitted by the light-generating element is received by the article or material. In other words, the article or material is configured to have a light-receiving relationship with the light-generating element. At least a portion of the radiation from the light-generating element will be received by the article or material. In embodiments, this can be direct, such as an article or material in physical contact with the light-emitting surface of the light-generating element. In embodiments, this can be via a medium, such as air, gas, or a liquid or solid light-guiding material. In embodiments, one or more optical devices, such as lenses, reflectors, or filters, may also be configured in the optical path between the light-generating element and the article or material.

[0042] In this embodiment (in the operating mode of the light generation system), the first luminescent material light and the second luminescent material light can be generated simultaneously. Therefore, the system can provide system light including the first luminescent material light and the second luminescent material light in the operating mode. Furthermore, the system light may include one or more of the following: unconverted first light source light, unconverted second light source light, light source light from a third light source, luminescent material light from another luminescent material, etc. Therefore, in this embodiment, in the operating mode, the light generation system is configured to generate system light including the first luminescent material light and the second luminescent material light.

[0043] In particular, the first luminescent material and the second luminescent material are (and therefore) different luminescent materials. The luminescent light of the first luminescent material and the second luminescent material can (and therefore) have different spectral power distributions (i.e., specifically green and / or yellow and orange and / or red, respectively).

[0044] As described above, in embodiments, the system light may include an unconverted first light source. In embodiments, this may result in the system light also including a blue component based on the unconverted first light source light. Essentially, this can be achieved in two ways. In a first way, at least a portion of the first light source light bypasses the first light source(s) and terminates as unconverted first light in the system light. This can be, for example, when the light from a light source is split into two(or more) portions, and the first portion is directed to the first light source(s), while the second portion is not directed to the light source(s) and bypasses them. Alternatively or additionally, this can be, for example, when one or more first light sources are used to illuminate the first light source(s) and one or more other first light sources are used as the light source for the system light (in operating mode) and their light bypasses the light source(s). Therefore, in embodiments, the system light may include first light source light. Thus, in a particular embodiment, in operating mode, the light generation system is configured to generate system light comprising first light source light, second light source light, and first light source light. In such embodiments, all first light sources may, for example, belong to the same range and have the same spectral power distribution to excite the first light source and serve as the blue component in the system light. Furthermore, in a more specific embodiment, in operating mode, the light generation system is configured to generate white system light comprising light from a first luminescent material, light from a second luminescent material, and light from a first light source. Optionally, the system light may also include (unconverted) light from a second light source.

[0045] Alternatively or additionally, in the second approach, the first system light can include blue light by using separate (blue) light sources. When these separate light sources are identical to the first light source, they are designated as the first light source. However, when they differ in type, range, and / or spectral power distribution, they can be designated as the third light source. This allows for the selection of a first light source with a spectral power distribution particularly suitable for exciting the first luminescent material and / or a third light source with a spectral power distribution particularly suitable for, for example, desired spectral power distributions (such as in terms of efficiency, power, CRI, CCT, and color gamut).

[0046] Therefore, in embodiments, the system may include a third light source configured to generate light having one or more wavelengths within the blue wavelength range. Thus, in embodiments, the third light source may be configured to generate light having one or more wavelengths within the 440-495 nm wavelength range, particularly light having a (third) centroid wavelength and / or peak wavelength within that wavelength range. For example, in embodiments, the third light source may be configured to generate light having a centroid wavelength selected from the 440-495 nm wavelength range. For example, in embodiments, the third centroid wavelength may be selected from the blue wavelength range. Specifically, the third light may have a different centroid wavelength (λ). C1 The third centroid wavelength (λ) C3 For example, in an embodiment, 2nm ≤ |λ C3 -λ C1 |≤55nm, such as in the embodiment, 10nm≤|λ C3 -λ C1 |≤40nm, as in the embodiment, 15nm≤|λ C3 -λ C1 |≤40nm. However, the wavelengths of the first and second centroids can also be essentially the same, such as 0nm≤|λ. C3 -λ C1 |≤2nm.

[0047] Therefore, in a particular embodiment, in operating mode, the light generation system can be configured to generate system light comprising light from a first luminescent material, light from a second luminescent material, and light from a third light source. In such an embodiment, the first and third light sources may, for example, belong to different ranges and have different spectral power distributions, used to excite the first luminescent material and as the blue component in the system light, respectively. Furthermore, in a more specific embodiment, in operating mode, the light generation system is configured to generate white system light comprising light from the first luminescent material, light from the second luminescent material, and light from the third light source. Optionally, the system light may also include one or more of the (unconverted) first light source light and the (unconverted) second light source light.

[0048] Therefore, in a particular embodiment, the light generation system may include a third light source configured to generate third light source light having one or more wavelengths in the blue wavelength range (particularly having a centroid wavelength of the third light source light in the blue wavelength range); wherein, in a particular embodiment, in an operating mode (of the light generation system), the light generation system is configured to generate white system light comprising third light source light, first luminescent material light, and second luminescent material light.

[0049] In embodiments, the third light source includes one or more of a (diode) laser and a superluminescent diode. Specifically, in embodiments, the third light source includes a (diode) laser.

[0050] The following describes some embodiments related to luminescent materials.

[0051] The term "luminescent material" specifically refers to a material capable of converting one or more of a first radiation, particularly UV radiation and blue radiation, into a second radiation. Typically, the first and second radiations have different spectral power distributions. Therefore, instead of the term "luminescent material," the terms "luminescent converter" or "converter" may also be used. Generally, the second radiation has a spectral power distribution at wavelengths larger than the first radiation, which is the case in so-called downconversion. However, in certain embodiments, the second radiation has a spectral power distribution with intensity at wavelengths smaller than the first radiation, which is the case in so-called upconversion.

[0052] In embodiments, "luminescent material" can specifically refer to a material capable of converting radiation into, for example, visible light and / or infrared light. For example, in embodiments, the luminescent material is capable of converting one or more of UV radiation and blue radiation into visible light. In certain embodiments, the luminescent material can also convert radiation into infrared radiation (IR). Therefore, when excited by radiation, the luminescent material emits radiation. Typically, the luminescent material will be a down-converter, i.e., radiation of a smaller wavelength is converted into radiation with a larger wavelength (λ). ex <λ em Although in certain embodiments, the luminescent material may include an up-converter luminescent material, i.e., radiation of a larger wavelength is converted into radiation of a smaller wavelength (λ). ex >λ em ).

[0053] In embodiments, the term "luminescence" may refer to phosphorescence. In embodiments, the term "luminescence" may also refer to fluorescence. Instead of "luminescence," the term "emission" may also be used. Therefore, the terms "first radiation" and "second radiation" may refer to excitation radiation and emission (radiation), respectively. Similarly, the term "luminescent material" in embodiments may refer to phosphorescence and / or fluorescence. The term "luminescent material" may also refer to a variety of different luminescent materials. Examples of possible luminescent materials are given below.

[0054] In the embodiments, the luminescent material is selected from garnet and nitride, particularly garnet and nitride doped with trivalent cerium or divalent europium, respectively. The term "nitride" may also refer to oxynitride or nitrogen silicate, etc.

[0055] In a particular embodiment, the luminescent material includes A3B5O. 12Ce-type luminescent materials, wherein A in embodiments comprises one or more of Y, La, Gd, Tb, and Lu, particularly (at least) one or more of Y, Gd, Tb, and Lu, and wherein B in embodiments comprises one or more of Al, Ga, In, and Sc. Specifically, A may comprise one or more of Y, Gd, and Lu, such as particularly one or more of Y and Lu. Specifically, B may comprise one or more of Al and Ga, more particularly at least Al, such as substantially entirely Al. Therefore, cerium-containing garnet materials are particularly suitable luminescent materials. Examples of garnet specifically include A3B5O. 12 Garnet, wherein A comprises at least yttrium or lutetium, and wherein B comprises at least aluminum. This garnet may be doped with cerium (Ce), praseodymium (Pr), or a combination of cerium and praseodymium; however, Ce is particularly preferred. Specifically, B comprises aluminum (Al), however, B may also partially comprise gallium (Ga) and / or scandium (Sc) and / or indium (In), particularly up to about 20% of Al, more particularly up to about 10% of Al (i.e., the B ions consist essentially of 90 or more mol% Al and 10 or less mol% of one or more of Ga, Sc, and In); B may particularly comprise up to about 10% gallium. In another variant, B and O may be at least partially substituted with Si and N. Element A may particularly be selected from the group consisting of yttrium (Y), gadolinium (Gd), terbium (Tb), and lutetium (Lu). Furthermore, Gd and / or Tb are particularly present only in amounts of up to about 20% of A. In a particular embodiment, the garnet luminescent material includes , where x is equal to or greater than 0 and equal to or less than 1. The term ":Ce" indicates that a portion of the metal ions in the luminescent material (i.e., a portion of the "A" ions in garnet) are replaced by Ce. For example, in In this case, a portion of Y and / or Lu is replaced by Ce. This is known to those skilled in the art. Ce will typically replace no more than 10% of A; generally, the Ce concentration will be in the range of 0.1% to 4%, particularly 0.1% to 2% (relative to A). Assuming 1% Ce and 10% Y, the perfectly correct molecular formula could be... It is known to those skilled in the art that Ce in garnet is essentially or only in a trivalent state.

[0056] In the embodiments, the luminescent material (therefore) comprises A3B5O. 12 In a particular embodiment, up to 10% of the BO can be replaced by Si-N.

[0057] In a particular embodiment, the luminescent material includes , where x1 + x2 + x3 = 1, where x3 > 0, where 0 < x2 + x3 ≤ 0.2, where y1 + y2 = 1, where 0 ≤ y2 ≤ 0.2, where A' comprises one or more elements selected from the group consisting of lanthanide elements, and where B' comprises one or more elements selected from the group consisting of Ga, In, and Sc. In an embodiment, x3 is selected from the range of 0.001 - 0.1. In the present invention, particularly x1 > 0, such as > 0.2, such as at least 0.8. The garnet having Y can provide a suitable spectral power distribution.

[0058] In a particular embodiment, up to 10% of B-O can be replaced by Si-N. Here, B in B-O refers to one or more of Al, Ga, In, and Sc (and O refers to oxygen); in a particular embodiment, B-O can refer to Al-O. As described above, in a particular embodiment, x3 can be selected from the range of 0.001 - 0.04. Particularly, such a luminescent material can have a suitable spectral distribution (but see below), have a relatively high efficiency, have a relatively high thermal stability, and allow a high CRI (in combination with the first light source light and the second light source light (and the filter)). Thus, in a particular embodiment, A can be selected from the group consisting of Lu and Gd. Alternatively or additionally, B can comprise Ga. Thus, in an embodiment, the luminescent material comprises , where Lu and / or Gd can be available. More particularly, x3 is selected from the range of 0.001 - 0.1, where 0 < x2 + x3 ≤ 0.1, and where 0 ≤ y2 ≤ 0.1. Further, in a particular embodiment, up to 1% of B-O can be replaced by Si-N. Here, the percentage refers to moles (as known in the art); see, for example, EP3149108. In yet another specific embodiment, the luminescent material comprises , where x1 + x3 = 1, and where 0 < x3 ≤ 0.2, such as 0.001 - 0.1.

[0059] In a particular embodiment, the light generating device can comprise only a luminescent material selected from the cerium-containing garnet type. In a further specific embodiment, the light generating device comprises a single type of luminescent material, such as . Thus, in a particular embodiment, the light generating device comprises a luminescent material, where at least 85 wt%, even more particularly at least about 90 wt%, such as even more particularly at least about 95 wt% of the luminescent material comprises Here, A' includes one or more elements selected from the group consisting of lanthanide elements, and B' includes one or more elements selected from the group consisting of Ga, In, and Sc, where x1 + x2 + x3 = 1, where x3 > 0, where 0 < x2 + x3 ≤ 0.2, where y1 + y2 = 1, and where 0 ≤ y2 ≤ 0.2. In particular, x3 is selected from the range of 0.001 - 0.1. Note that in the examples, x2 = 0. Alternatively or additionally, in the examples, y2 = 0.

[0060] In a particular embodiment, A can particularly include at least Y, and B can particularly include at least Al.

[0061] Alternatively or additionally, the luminescent material can include A3Si6N 11 :Ce 3+ type of luminescent material, where A includes one or more of Y, La, Gd, Tb, and Lu, such as in the examples, including one or more of La and Y.

[0062] In an example, the luminescent material can alternatively or additionally include M2Si5N8:Eu 2+ and / or MAlSiN3:Eu 2+ and / or Ca2AlSi3O2N5:Eu 2+ etc. one or more of them, where M includes one or more of Ba, Sr, and Ca, particularly in the examples, including at least Sr. In an example, the luminescent can include one or more materials selected from the group consisting of , and In these compounds, europium (Eu) is substantially or only divalent and replaces one or more of the indicated divalent cations. Generally, the amount of Eu present does not exceed 10% of the cations; its presence relative to the (multiple) cations it replaces will particularly be in the range of about 0.5% to 10%, more particularly in the range of about 0.5% to 5%. The term ":Eu" indicates that a portion of the metal ions is replaced by Eu (replaced by Eu in these examples). For example, assuming 2+ contains 2% Eu, the correct chemical formula can be . Divalent europium typically replaces divalent cations, such as the divalent alkaline earth cations mentioned above, particularly Ca, Sr, or Ba. The material . It can also be represented as MS:Eu, where M is one or more elements selected from the group consisting of barium (Ba), strontium (Sr), and calcium (Ca); in particular, M includes calcium or strontium, or calcium and strontium, more particularly calcium, in the compound. Here, Eu is introduced and Eu replaces at least a portion of M (i.e., one or more of Ba, Sr, and Ca). Furthermore, the material... It can also be represented as M is one or more elements selected from the group consisting of barium (Ba), strontium (Sr), and calcium (Ca); in particular, M includes Sr and / or Ba in the compound. In another specific embodiment, M consists of Sr and / or Ba (without regard to the presence of Eu), particularly 50% to 100%, more particularly 50% to 90% Ba and 50% to 0%, particularly 50% to 10% Sr, such as... (i.e., 75% Ba; 25% Sr). Here, Eu is introduced and Eu replaces at least a portion of M (i.e., one or more of Ba, Sr, and Ca). Similarly, the material... It can also be represented as M is one or more elements selected from the group consisting of barium (Ba), strontium (Sr), and calcium (Ca); in particular, M includes calcium or strontium, or calcium and strontium, more particularly calcium, in the compound. Here, Eu is introduced and Eu replaces at least a portion of M (i.e., one or more of Ba, Sr, and Ca). As is known to those skilled in the art, Eu in the luminescent materials indicated above is substantially or only in a divalent state.

[0063] In an embodiment, the red luminescent material may include materials derived from... , and One or more materials selected from the group consisting of these compounds. In these compounds, europium (Eu) is essentially or only divalent and substitutes for one or more of the indicated divalent cations. Typically, the amount of Eu present does not exceed 10% of the cation; its presence relative to the substituted cation(s) will be particularly in the range of about 0.5% to 10%, more particularly in the range of about 0.5% to 5%. The term ":Eu" indicates that a portion of the metal ion is substituted by Eu (in these examples, Eu is substituted for Eu). 2+ (Replace). For example, assume It contains 2% Eu, and the correct molecular formula can be: Divalent europium often substitutes for divalent cations, such as the aforementioned divalent alkaline earth cations, especially Ca, Sr, or Ba.

[0064] Material It can also be represented as MS:Eu, where M is one or more elements selected from the group consisting of barium (Ba), strontium (Sr) and calcium (Ca); in particular, M includes calcium or strontium, or calcium and strontium, more particularly calcium in the compound. Here, Eu is introduced and Eu replaces at least a portion of M (i.e., one or more of Ba, Sr and Ca).

[0065] In addition, materials It can also be represented as M is one or more elements selected from the group consisting of barium (Ba), strontium (Sr), and calcium (Ca); in particular, M includes Sr and / or Ba in the compound. In another specific embodiment, M consists of Sr and / or Ba (without regard to the presence of Eu), particularly 50% to 100%, more particularly 50% to 90% Ba and 50% to 0%, particularly 50% to 10% Sr, such as... (i.e., 75% Ba; 25% Sr). Here, Eu is introduced and Eu replaces at least a portion of M (i.e., one or more of Ba, Sr and Ca).

[0066] Similarly, materials It can also be represented as M is one or more elements selected from the group consisting of barium (Ba), strontium (Sr), and calcium (Ca); in particular, M includes calcium or strontium, or calcium and strontium, more particularly calcium in the compound. Here, Eu is introduced and Eu replaces at least a portion of M (i.e., one or more of Ba, Sr, and Ca).

[0067] As is known to those skilled in the art, the Eu in the above-mentioned luminescent materials is essentially or only in a divalent state.

[0068] Blue luminescent materials may include or similar compounds, or or similar compounds.

[0069] The term "luminescent material" in this article specifically refers to inorganic luminescent materials.

[0070] The term "phosphor" is also used instead of "luminescent material." These terms are known to those skilled in the art.

[0071] Alternatively or additionally, other luminescent materials may be used. For example, quantum dots and / or organic dyes may be used, and they may optionally be embedded in a transmissive matrix, such as polymers like PMMA or polysiloxanes.

[0072] Quantum dots are tiny crystals of semiconductor materials, typically only a few nanometers wide or in diameter. When excited by incident light, the color of the light emitted by a quantum dot is determined by the size and material of the crystal. Therefore, light of a specific color can be generated by adjusting the size of the dot. Most known quantum dots that emit light in the visible light range are based on cadmium selenide (CdSe) with a shell, such as cadmium sulfide (CdS) and zinc sulfide (ZnS). Cadmium-free quantum dots such as indium phosphide (InP), copper indium sulfide (CuInS2), and / or silver indium sulfide (AgInS2) can also be used. Quantum dots exhibit very narrow emission bands and therefore display saturated colors. Furthermore, the emission color can be easily adjusted by regulating the size of the quantum dot. Any type of quantum dot known in the art can be used in this invention. However, for environmental safety and concerns, cadmium-free quantum dots or quantum dots with at least very low cadmium content are preferred.

[0073] Other quantum confinement structures can be used instead of quantum dots, or in addition to quantum dots. In the context of this application, the term "quantum confinement structure" should be understood to mean, for example, quantum wells, quantum dots, quantum rods, tripods, tetrapods, or nanowires.

[0074] Organic phosphors may also be used. Examples of suitable organic phosphor materials are perylene derivative-based organic light-emitting materials, such as compounds sold by BASF under the name Lumogen®. Examples of suitable compounds include, but are not limited to, Lumogen® Red F305, Lumogen® Orange F240, Lumogen® Yellow F083, and Lumogen® F170.

[0075] Different luminescent materials can have different spectral power distributions of their light. Alternatively or additionally, these different luminescent materials can have different color points (or dominant wavelengths).

[0076] As described above, other luminescent materials are also possible. Therefore, in a particular embodiment, the luminescent material is selected from the group consisting of: europium-containing nitrides, iridium-containing oxynitrides, europium-containing silicates, cerium-containing garnets, and quantum structures. Quantum structures may, for example, include quantum dots or quantum rods (or other quantum types of particles) (see above). Quantum structures may also include quantum wells. Quantum structures may also include photonic crystals.

[0077] In embodiments, the (inorganic) luminescent material may be provided as a single crystal, a ceramic body, or a luminescent material dispersed in another material (such as a polymeric material). Organic luminescent materials and / or quantum dots may also be dispersed in another material, such as a polymeric material.

[0078] Specifically, in the embodiments, the first luminescent material may include A3B5O. 12 Ce-type luminescent materials, wherein A includes one or more of Y, La, Gd, Tb, and Lu, and wherein B includes one or more of Al, Ga, In, and Sc. As indicated above, this type of luminescent material can be relatively efficient. Alternatively or additionally, in embodiments, the first luminescent material may include A3Si6N. 11 :Ce 3+ The type of luminescent material, wherein A includes one or more of Y, La, Gd, Tb and Lu, especially one or more of La and Y.

[0079] Note that one or more first luminescent materials may be applied. Furthermore, the first luminescent materials may be irradiated by one or more first light sources (in operating mode). Therefore, when two or more different first luminescent materials are applied, each of the first luminescent materials may be irradiated by one or more first light sources (in operating mode).

[0080] In a particular embodiment, the system may include a ceramic body, wherein the ceramic body comprises a first light-emitting material. For example, the first light-emitting material may be provided as a ceramic body. The ceramic body may be useful in terms of thermal conductivity and / or may be used, for example, in transmission mode.

[0081] Ceramic bodies are known in the art. In particular, ceramic materials can be obtained by sintering and / or hot pressing processes, optionally followed by annealing in a (slightly) oxidizing atmosphere. The term "ceramic" specifically refers to an inorganic material, for example, that can be obtained by sintering at temperatures of at least 500°C, particularly at least 800°C, such as at least 1000°C, such as at least 1400°C, under reduced pressure, atmospheric pressure, or high pressure, such as at 10... -8 It can be obtained by heating (polycrystalline) powder in the range of MPa to 500 MPa, such as particularly at least 0.5 MPa, such as particularly at least 1 MPa, such as 1 MPa to about 500 MPa, such as at least 5 MPa, or at least 10 MPa, particularly under uniaxial or isostatic pressure, particularly under isostatic pressure.

[0082] Alternatively or additionally, the second luminescent material comprises a luminescent material selected from the group consisting of: MS:Eu 2+ M includes one or more of calcium and strontium; M2Si5N8:Eu 2+ M includes one or more of calcium, strontium, and barium; MAlSiN3:Eu 2+ M includes one or more of calcium and strontium; MLi2Al2O2N2:Eu 2+ M includes strontium; MLiAl3N4:Eu2+ M includes strontium; MCaSiN2:Ce 3+ M includes one or more of calcium and strontium; and M(Si,Al)N2:Ce 3+ M includes calcium. Such luminescent materials can be relatively efficient, and / or can have a relatively small Stokes shift, and / or can be relatively stable.

[0083] Note that one or more second luminescent materials may be applied. Furthermore, the second luminescent materials may be illuminated by one or more second light sources (in operating mode). Therefore, when two or more different second luminescent materials are applied, each second luminescent material may be illuminated by one or more second light sources (in operating mode).

[0084] In a particular embodiment, the second light source can be configured to generate second light source light having one or more wavelengths in the wavelength range of 570-620 nm. Therefore, in a particular embodiment, the second centroid wavelength λ C2 The wavelength can be selected from the range of 570-620 nm. Alternatively or additionally, the second luminescent material can be configured to convert at least a portion of the light from the second light source into second luminescent material light having one or more wavelengths in the wavelength range of 610-665 nm, such as about 610-635 nm, for example 610-625 nm. In yet another specific embodiment, the centroid wavelength λ of the second luminescent material light... L2 It can be selected from the 610-625nm range, such as 610-635nm, or at least 615nm. Especially λ C2 <λ L2 For example, in the embodiment, 5nm ≤ λ L2 -λ C2 ≤85nm, such as especially 10nm≤λ L2 -λ C2 ≤65nm. Therefore, in an embodiment, the first light source is configured to generate first light source light having one or more wavelengths in the wavelength range of 440-495nm. Alternatively or additionally, in an embodiment, the second light source is configured to generate second light source light having one or more wavelengths in the wavelength range of 570-620nm. Alternatively or additionally, in an embodiment, the first luminescent material is configured to convert at least a portion of the first light source light into first luminescent material light having one or more wavelengths in the wavelength range of 495-590nm. Alternatively or additionally, in an embodiment, the second luminescent material is configured to convert at least a portion of the second light source light into second luminescent material light having one or more wavelengths in the wavelength range of 610-665nm.

[0085] Therefore, in a particular embodiment, the first light source is configured to generate first light source light having a centroid wavelength in the wavelength range of 440-495 nm. Alternatively or additionally, in an embodiment, the second light source is configured to generate second light source light having a centroid wavelength in the wavelength range of 570-620 nm. Alternatively or additionally, in an embodiment, the first luminescent material is configured to convert at least a portion of the first light source light into first luminescent material light having a centroid wavelength in the wavelength range of 495-590 nm. Alternatively or additionally, in an embodiment, the second luminescent material is configured to convert at least a portion of the second light source light into second luminescent material light having a centroid wavelength in the wavelength range of 610-665 nm.

[0086] The luminescent material can be configured in either a reflective or a transmissive mode. In transmissive mode, the light from the source source can be relatively easily mixed with the light from the luminescent material, which is useful for generating the desired spectral power distribution. In reflective mode, thermal management can be easier because most of the luminescent material can be in thermal contact with a heat-conducting element such as a heat sink or fin. In reflective mode, a portion of the light from the source source can be reflected by the luminescent material and / or a reflector in the embodiments, and can be mixed with the light from the luminescent material. The reflector can be configured downstream of the luminescent material (in reflective mode).

[0087] Therefore, the luminescent material can operate in either a transmission mode or a reflection mode; this can also differ between two luminescent materials; or the two luminescent materials can operate in the same mode. Thus, in the embodiments, one or more of the first and second luminescent materials operate in a reflection mode.

[0088] Note that the use of more than two different luminescent materials and / or additional light sources besides the first, second, and third light sources is not excluded herein. Therefore, in embodiments, the system light may include contributions other than those indicated herein by the first, second, first luminescent material, second, and third light sources. Specifically, in embodiments, in operating mode, at least 90% of the spectral power of the system light in the visible wavelength range (i.e., 380-780 nm) is defined by one or more of the first, second, first, second, and third light sources, such as at least 95%. Therefore, in embodiments, when integrating the spectral power over the 380-780 nm wavelength range, at least 90% comes from one or more of the first, second, first, second, and third light sources. The contributions of the first, second, first, second, and third light sources may depend on the operating mode.

[0089] Light from different light sources (such as a first luminescent material, a second luminescent material, and optionally, one or more of a first light source, a second light source, and an optional third light source) can be combined into a single beam. Specifically, the system can be configured to generate a system beam comprising one or more of a first luminescent material and a second luminescent material, and optionally, one or more of a first light source, a second light source, and an optional third light source. For this purpose, the system may include optical components.

[0090] The term "optical device" can specifically refer to (one or more) optical elements. Optical devices can include one or more of the following: mirrors, reflectors, collimators, lenses, prisms, diffusers, phase plates, polarizers, diffraction elements, gratings, dichroists, arrays of one or more of the above, etc.

[0091] In particular, in embodiments, the optical device may include at least a light mixing optical device, such as a light combining element configured to combine two or more (different) light beams (e.g., light from a first luminescent material and light from a second luminescent material).

[0092] In embodiments, the light-mixing optics may include one or more of the following: diffusers (surface or volume scattering diffusers or engineered holographic optics), light pipes, light guides, Koehler integrator optics, etc. Alternatively or additionally, the light-mixing optics may include collimators or other collimating optics. Alternatively or additionally, the light-mixing optics may include dichroic beam combiners, such as dichroic cubes in certain embodiments.

[0093] Therefore, in embodiments, the system may include one or more optical combining elements configured to combine at least a first luminescent material light and a second luminescent material light in an operating mode. Thus, in a particular embodiment, the system may include one or more optical combining elements configured to optionally combine one or more of a first light source light, a second light source light, and an optional third light source light (combining them into a single beam) in an operating mode. Here, the phrase "one or more optical combining elements configured to combine at least a first luminescent material light and a second luminescent material light in an operating mode" and similar phrases are used to indicate that when this type of light is provided, the optical combining elements can combine these light sources. Therefore, when this type of light is actually provided in the system's operating mode, and when these types of light are available, the optics are configured to combine these types of light.

[0094] At the system's exit point, beam-forming optics or diffusers can be provided to provide beam-forming beams or diffused beams, respectively.

[0095] As indicated above, the luminescent material can provide heat when irradiated. Furthermore, the light source can provide heat when operated. Therefore, the system may also include one or more heat sinks, and / or one or more heat fins, and / or one or more active cooling elements, etc.

[0096] In particular, in the embodiments, one or more of the first luminescent material and the second luminescent material can be thermally coupled to the heat-conducting element.

[0097] The thermally conductive element specifically includes a thermally conductive material. The thermally conductive material may, in particular, have a thermal conductivity of at least about 20 W / m / K, such as at least about 30 W / m / K, such as at least about 100 W / m / K, and particularly at least about 200 W / m / K. In yet another specific embodiment, the thermally conductive material may, in particular, have a thermal conductivity of at least about 10 W / m / K.

[0098] In embodiments, the thermally conductive material may include one or more of the following: copper, aluminum, silver, gold, silicon carbide, aluminum nitride, boron nitride, aluminum silicon carbide, beryllium oxide, silicon carbide composite, aluminum silicon carbide, copper-tungsten alloy, copper molybdenum carbide, carbon, diamond, and graphite. Alternatively or additionally, the thermally conductive material may include or be composed of aluminum oxide.

[0099] Heat sinks are known in the art. The term "heat sink" (or heat fin) can specifically refer to a passive heat exchanger that transfers heat generated by a device such as electronic or mechanical equipment to a fluid (cooling) medium (which is typically air or a liquid coolant). Thus, heat is dissipated (at least partially) from the device. Heat sinks are specifically designed to maximize their surface area in contact with the surrounding fluid cooling medium. Therefore, in particular, a heat sink may include multiple fins. For example, a heat sink may be a body having multiple extended fins.

[0100] A radiator specifically includes (and is composed of) thermally conductive materials. The term "radiator" can also refer to multiple (different) radiators.

[0101] Therefore, in the embodiments, one or more of the first luminescent material and the second luminescent material may be supported by a thermally conductive support. In particular, in the embodiments, both the first luminescent material and the second luminescent material are supported by a thermally conductive support.

[0102] In the embodiments, light-emitting materials such as light emitters can be thermally coupled to heat-conducting elements such as heat sinks, but can be optically coupled.

[0103] When elements are optically contacted or optically coupled, in some embodiments they may be physically in contact with each other, or in others they may be separated from each other by, for example, a (thin) layer of optical material (such as optical adhesive) or other optically transparent interface material (e.g., less than about 1 mm thick, preferably less than 100 µm). When no optically transparent interface material is applied, the (average) distance between two optically contacted elements can be particularly maximum about the relevant wavelength, such as the emission wavelength. For visible light wavelengths, this can be less than 1 µm, such as less than 0.7 µm, and for blue light, it can be even smaller. Therefore, optically transparent interface materials can be applied when optical coupling is required. In other embodiments, when no optically transparent interface material is applied, the average distance between two optically contacted elements can particularly be maximum about the relevant wavelength, such as the emission wavelength. Therefore, physical contact can be present when optical contact is required. However, even in such embodiments, a non-zero average distance may exist, but subsequently equal to or less than the wavelength of interest, such as the centroid wavelength of laser radiation.

[0104] In one embodiment, the support may be reflective. In such an embodiment, the luminescent material can operate in a reflective mode. In other embodiments, the support may be optically transmissive. In such an embodiment, the luminescent material can operate in a transmissive mode.

[0105] In a particular embodiment, the system may include an integrated light source package, wherein the integrated light source package includes a common support member configured to support a plurality of light sources, a first luminescent material, and a second luminescent material, wherein the common support member includes a thermally conductive support. The plurality of light sources may provide optical axes for their light sources, the angle α between the optical axis and the surface of the respective luminescent material being selected from a range of at least 20° to less than 90°. Specifically, in an embodiment, α may be selected from a range of 30-60°. Furthermore, in a particular embodiment, n light source lasers may be provided at an angle of 360 / n relative to each other.

[0106] Furthermore, the system may include or be functionally coupled to a control system. The control system can control the light-generating device and optional other devices, such as those indicated above.

[0107] The term "control" and similar terms specifically refer at least to determining the behavior of an element or supervising the operation of an element. Therefore, "control" and similar terms as used herein can refer, for example, to imposing behavior on an element (determining the behavior of the element or supervising the operation of the element), such as measuring, displaying, actuating, turning on, moving, changing temperature, etc. In addition, the term "control" and similar terms can also include monitoring. Therefore, the term "control" and similar terms can include imposing behavior on an element, or imposing behavior on an element and monitoring the element. Control of the element can be performed using a control system, which can also be referred to as a "controller". The control system and the element can therefore be functionally coupled, at least temporarily or permanently. The element can include a control system. In embodiments, the control system and the element may not be physically coupled. Control can be performed via wired and / or wireless control. The term "control system" can also refer to multiple different control systems that are functionally coupled, and wherein, for example, one control system can be a master control system and one or more other control systems can be slave control systems. The control system can include or can be functionally coupled to a user interface.

[0108] The control system can also be configured to receive and execute commands from a remote controller. In embodiments, the control system can be controlled via an application on the device, such as a portable device like a smartphone or iPhone, tablet, etc. Therefore, the device is not necessarily coupled to the lighting system, but can be (temporarily) functionally coupled to the lighting system.

[0109] Therefore, in embodiments, the control system can also be configured to be controlled by an application on a remote device. In such embodiments, the control system of the lighting system can be a slave control system or a control in slave mode. For example, the lighting system can be identified by a code, specifically a unique code for the respective lighting system. The control system of the lighting system can be configured to be controlled by an external control system that can access the lighting system based on knowledge of the (unique) code (input via a user interface with optical sensors, such as a QR code reader). The lighting system may also include components for communicating with other systems or devices, such as based on Bluetooth, Wi-Fi, ZigBee, BLE, or WiMax or other wireless technologies.

[0110] The system, apparatus, or device can perform actions in a “mode,” “operating mode,” “operable mode,” “mode of operation,” or “control mode.” Similarly, in a method, actions, stages, or steps can be performed in a “mode,” “operating mode,” “operable mode,” “mode of operation,” or “control mode.” The term “mode” can also be interpreted as “control mode.” This does not preclude the system, apparatus, or device from being adapted to provide another control mode or multiple other control modes. Likewise, this does not preclude the possibility of performing one or more other modes before and / or after the execution of a particular mode.

[0111] However, in embodiments, a control system may be available, and the control system may be adapted to provide at least a control mode. If other modes are available, the selection of such modes may be performed specifically via a user interface, although other options are also possible, such as performing modes based on sensor signals or a (time) scheme. In embodiments, an operating mode may also refer to a system, apparatus, or device that can only operate in a single operating mode (i.e., "on," without further tunability).

[0112] Therefore, in this embodiment, the control system can be controlled based on one or more of the following: input signals from the user interface, sensor signals (from sensors), and timers. The term "timer" can refer to a clock and / or a predetermined timing scheme.

[0113] In particular, the spectral power distribution of system light can be controlled by controlling multiple light sources. This can be done by controlling each light source individually, or by controlling two or more subsets of multiple light sources, where each subset includes one or more light sources, for example, one or more first subsets, each first subset including one or more first light sources; one or more second subsets, each second subset including one or more second light sources; and optionally one or more third subsets, each third subset including one or more third light sources.

[0114] Therefore, the system may include a control system configured to individually control (i) one or more first light sources and (ii) one or more second light sources (and optionally one or more third light sources) to control the spectral power distribution of the system light.

[0115] In one or more operating modes, the system light can be white (system) light. The term "white light" as used herein is known to those skilled in the art. It particularly refers to light having a correlated color temperature (CCT) between about 1800K and 20000K, such as between 2000K and 20000K, particularly 2700-20000K, for general illumination, especially in the range of about 2700K to 6500K. In embodiments, for backlighting purposes, the correlated color temperature (CCT) may particularly be in the range of about 7000K to 20000K. Furthermore, in embodiments, the correlated color temperature is particularly within about 15 SDCM (standard deviation of color matching) from the BBL (blackbody track), particularly within about 10 SDCM from the BBL, and even more particularly within about 5 SDCM from the BBL.

[0116] The terms “visible,” “visible light,” or “visible emission,” and similar terms refer to light having one or more wavelengths in the range of about 380-780 nm. Here, UV may specifically refer to wavelengths selected from the range of 200-380 nm.

[0117] Light generating systems can be, for example, part of or applied to the following: office lighting systems, home application systems, shop lighting systems, residential lighting systems, accent lighting systems, spotlight systems, theater lighting systems, fiber optic application systems, projection systems, self-emissive display systems, pixelated display systems, segmented display systems, warning sign systems, medical lighting application systems, signage systems, decorative lighting systems, portable systems, automotive applications, (outdoor) road lighting systems, urban lighting systems, greenhouse lighting systems, horticultural lighting, digital projection, or LCD backlighting. Light generating systems (or illuminators) can be, for example, part of, optical communication systems or disinfection systems, or can be applied to, for example, optical communication systems or disinfection systems.

[0118] In another aspect, the invention also provides a lamp or illuminator that includes a light generating system as defined herein. The illuminator may also include a housing, optical elements, blinds, etc. The lamp or illuminator may also include a housing surrounding the light generating system. The lamp or illuminator may include a light window in the housing or an opening in the housing through which system light can escape from the housing. In yet another aspect, the invention also provides a projection device that includes a light generating system as defined herein. In particular, a projection device, or "projector" or "image projector," can be an optical device that projects an image (or moving image) onto a surface (such as a projection screen). The projection device may include one or more light generating systems such as those described herein. The light generating system can also be used for disinfection or optical wireless communication. Therefore, in one aspect, the invention also provides a light generating device selected from the group consisting of light generating systems as defined herein: lamps, illuminators, projection devices, disinfection devices, and optical wireless communication devices. Attached Figure Description

[0119] Embodiments of the invention will now be described by way of example only with reference to the accompanying drawings, in which corresponding reference numerals indicate corresponding parts, and in the drawings:

[0120] Figures 1A-1C An embodiment and a variation are schematically depicted;

[0121] Figures 2A-2B Some spectral power distributions are schematically depicted; and

[0122] Figure 3 Some applications are shown.

[0123] The diagram is not necessarily drawn to scale. Detailed Implementation

[0124] Figure 1A Several embodiments of the light generation system 1000 are schematically depicted. All three embodiments operate the luminescent material in transmission mode. However, as... Figure 1C As shown below, a reflection mode can also be applied. Furthermore, one luminescent material can be operated in a transmission mode while another luminescent material can be operated in a reflection mode. Therefore, in the embodiments, one or more of the first luminescent material 210 and the second luminescent material 220 can operate in transmission mode.

[0125] System 1000 includes (i) a plurality of light sources 110, 120, ..., (ii) a first luminescent material 210 and (iii) a second luminescent material 220. The phrase “a plurality of light sources 110, 120, ...” in an embodiment may indicate that the plurality of light sources may include at least a first type of light source and a second type of light source and optionally include other types of light sources.

[0126] The first light source 110 is configured to generate first light 111, specifically first light 111 having one or more wavelengths in the blue wavelength range, and in an embodiment having a first centroid wavelength λ. C1 The first light source 111. In particular, in embodiments, the first light source 110 includes one or more lasers (a laser is schematically depicted herein). The first luminescent material 210 is configured to convert at least a portion of the first light source light 111 into first luminescent material light 211, particularly first luminescent material light 211 having one or more wavelengths in the green and / or yellow wavelength range.

[0127] The second light source 120 is configured to generate one or more wavelengths within the yellow and / or orange wavelength range and having a second centroid wavelength λ. C2 The second light 121. Specifically, in the embodiment, λ C2 >λ C1 Furthermore, in embodiments, the second light source 120 may include one or more superluminescent diodes (SLDs are schematically depicted herein). In embodiments, the second luminescent material 220 may be configured to convert at least a portion of the second light 121 into second luminescent material light 221. In particular, the second luminescent material light 221 has one or more wavelengths in the orange and / or red wavelength range.

[0128] In an embodiment, in the operating mode (of system 1000), the light generation system 1000 is configured to generate system light 1001 comprising first luminescent material light 211 and second luminescent material light 221 (see also, for example, see also). Figures 2A-2B ).

[0129] refer to Figure 1A In Embodiment I, in operating mode, the system light can be substantially composed of light from the first luminescent material 211 and light from the second luminescent material 221, because unconverted light source lights 111 and 121 may be absent (e.g., 100% of the spectral power can be composed of these contributions). Figure 1AIn Embodiment II, it is shown that a portion of the first light source light 111 can also terminate as system light 1001. In such an embodiment, in the operating mode ( of system 1000), the system light may include first luminescent material light 211, second luminescent material light 221, and first light source light 111. As an alternative to or supplement to the first light source light 111, system light 1001 may include (in the operating mode) second light source light 121. Figure 1A In Embodiment III, a third light source 130 is applied. Therefore, the system 1000 may include a third light source 130 configured to generate third light source light 131 having one or more wavelengths in the blue wavelength range. Here, the third light source light 131 bypasses the luminescent materials 210, 220. In such an embodiment, in operating mode, the light generation system 1000 is configured to generate white system light 1001 comprising the third light source light 131, the first luminescent material light 211, and the second luminescent material light 221. In embodiments, the third light source 130 may include one or more of a (diode) laser and a superluminescent diode.

[0130] Reference numeral 400 in the figure refers to an end window or optical element, particularly an optical element such as a beam shaping element and / or a light homogenizer (see also below).

[0131] Reference numeral 300 refers to the control system. Therefore, the light generation system 1000 may include a control system 300, wherein the control system may be specifically configured to individually control (i) one or more of one or more first light sources 110, and (ii) one or more of one or more second light sources 120. This allows the spectral power distribution of the system light 1001 to be controlled (see also...). Figures 2A-2B Referring to Embodiment III, when the (multiple) first light sources 110, (multiple) second light sources 120 and (multiple) third light sources 130 are individually controlled, a system light 1001 including one or more of the first luminescent material light 211, the second luminescent material light 221 and the third light source light 131 can be created.

[0132] Figure 1B Another embodiment is schematically depicted, in which one or more light combining elements 420 are applied. The one or more light combining elements 420 may be configured to combine at least a first luminescent material light 211 and a second luminescent material light 221 in an operating mode. The one or more light combining elements 420 may be configured to combine the first luminescent material light 211, the second luminescent material light 221, and a third light source light 131 in an operating mode. System light 1001 may escape from the system via end windows or optical elements, particularly optical elements such as beam shaping elements and / or light homogenizers (see also above).

[0133] Figure 1COther embodiments combined in one figure are schematically depicted, illustrating the use of the support and the reflection mode. However, note that the support can also be optically transmissive. Therefore, the support can also be used in conjunction with a transmissive mode. Figure 1C An embodiment is schematically depicted in which one or more of the first luminescent material 210 and the second luminescent material 220 operate in a reflective mode. Here, both are configured / operate in reflective mode. The support may be thermally conductive. Therefore, Figure 1C An embodiment is also schematically depicted, wherein the first luminescent material 210 and the second luminescent material 220 are supported by a thermally conductive support 500. Furthermore, Figure 1C An embodiment of an integrated light source package 600 is schematically depicted, wherein the integrated light source package 600 may include a common support member 610 configured to support a plurality of light sources 110, 120, ..., a first luminescent material 210 and a second luminescent material 220, wherein the common support member 610 includes a thermally conductive support member 500. Multiple elements 505 may be used to support the plurality of light sources. Elements 505 and support member 500 may be a single piece of support member 610. Regardless, element 505 may also include a thermally conductive material. The plurality of light sources may provide an optical axis for their light emission, the angle α between the optical axis and the surface of the respective luminescent material being selected from a range of at least 20° to less than 90°. Specifically, in the embodiment, α may be selected from a range of 30-60°.

[0134] For example Figures 1A-1C (as well as Figures 2A-2B In this embodiment, the first luminescent material 210 may include A3B5O. 12 The luminescent material is of the Ce type, wherein A includes one or more of Y, La, Gd, Tb, and Lu, and wherein B includes one or more of Al, Ga, In, and Sc, and / or another first luminescent material (see also above), such as a nitride-based luminescent material. In an embodiment, system 1000 may include a ceramic body 1210, wherein the ceramic body 1210 includes a first luminescent material 210. In an embodiment, the second luminescent material 220 includes a luminescent material selected from the group consisting of: MS:Eu 2+ M includes one or more of calcium and strontium; M2Si5N8:Eu 2+ M includes one or more of calcium, strontium, and barium; MAlSiN3:Eu 2+ M includes one or more of calcium and strontium; MLi2Al2O2N2:Eu 2+ M includes strontium; MLiAl3N4:Eu 2+ M includes strontium; MCaSiN2:Ce 3+M includes one or more of calcium and strontium; and M(Si,Al)N2:Ce 3+ M includes calcium.

[0135] In addition, refer to, for example Figures 1A-1C (as well as Figures 2A-2B In one embodiment, the first light source 110 is configured to generate first light 111 having one or more wavelengths in the wavelength range of 440-495 nm. Alternatively or additionally, in another embodiment, the second light source 120 is configured to generate second light 121 having one or more wavelengths in the wavelength range of 570-620 nm. Furthermore, in a particular embodiment, the second luminescent material 220 is configured to convert at least a portion of the second light 121 into second luminescent material light 221 having one or more wavelengths in the wavelength range of 610-625 nm.

[0136] Several embodiments are indicated below:

[0137]

[0138] Here are some other examples:

[0139]

[0140] refer to Figures 2A-2B Reference λ CL1 This refers to the centroid wavelength of the light from the first luminescent material, λ. CL2 This refers to the centroid wavelength of light 221 from the second luminescent material. Therefore, λ C1 <λ CL1 <λ C2 <λ CL2 Specifically, each centroid wavelength differs from the other centroid wavelengths by at least 10 nm, such as at least 20 nm. Figures 2A-2B The relevant data can also be found in the table above. (Reference) Figures 2A-2B When integrating the spectral power in the wavelength range of 380-780 nm, at least 90% comes from one or more of the first light source, the second light source, the first luminescent material light, the second luminescent material light, and the third light source. The contributions of the first light source, the second light source, the first luminescent material light, the second luminescent material light, and the third light source can depend on the corresponding operating mode.

[0141] Figure 3 An embodiment of an illuminator 2 including the light generating system 1000 as described above is schematically depicted. Reference numeral 301 indicates a user interface that may be functionally coupled to or included in the control system 300 of the light generating system 1000 or functionally coupled to the light generating system 1000. Figure 3An embodiment of a lamp 1 including a light generating system 1000 is also schematically depicted. Reference numeral 3 indicates a projection device or system that can be used, such as projecting images onto a wall, and may also include the light generating system 1000. Therefore, Figure 3 An embodiment of a light generating device 1200 is schematically depicted, which is selected from the group consisting of the light generating system 1000 described herein: lamp 1, illuminator 2, projection device 3, disinfection device, and optical wireless communication device.

[0142] The term "multiple" refers to two or more.

[0143] Those skilled in the art will understand the terms "substantially" or "essentially" and similar terms used herein. The term "substantially" or "essentially" may also include embodiments with terms such as "entire," "complete," and "all." Therefore, in embodiments, the adjective "substantially" or "essentially" may also be removed. Where applicable, the term "substantially" or "essentially" may also refer to 90% or higher, such as 95% or higher, particularly 99% or higher, and more particularly 99.5% or higher (including 100%).

[0144] The term "comprising" also includes embodiments thereof, which are defined as "consisting of".

[0145] The term “and / or” specifically refers to one or more items mentioned before and after “and / or”. For example, the phrase “item 1 and / or item 2” and similar phrases may refer to one or more of item 1 and item 2. The term “comprising” in one embodiment may mean “consisting of”, but in another embodiment it may also mean “containing at least the defined species and optional one or more other species.”

[0146] Furthermore, the terms first, second, third, etc., used in the specification and claims are used to distinguish similar elements and are not necessarily used to describe an order or chronological order. It should be understood that such terms are interchangeable where appropriate, and the embodiments of the invention described herein can operate in orders other than those described or illustrated herein.

[0147] The equipment, apparatus, or system described herein may be used during operation. As will be apparent to those skilled in the art, the invention is not limited to the method of operation, or the equipment, apparatus, or system in operation.

[0148] It should be noted that the above embodiments are illustrative and not limiting of the invention, and those skilled in the art will be able to devise many alternative embodiments without departing from the scope of the appended claims.

[0149] In the claims, any reference numerals placed between parentheses should not be construed as limiting the claims.

[0150] The use of the verb "comprising" and its variations does not exclude the presence of elements or steps other than those described in the claims. Unless the context explicitly requires otherwise, throughout the specification and claims, the words "comprising," "including," etc., should be interpreted in an inclusive sense, rather than an exclusive or exhaustive sense; that is, in the sense of "including but not limited to."

[0151] The article "one" or "a" preceding an element does not preclude the existence of multiple such elements.

[0152] This invention can be implemented by hardware comprising several different elements and by a suitably programmed computer. In the device, apparatus, or system claims enumerating several means, several of these means can be embodied by the same hardware item. The fact that certain measures are enumerated only in mutually different dependent claims does not imply that a combination of these measures cannot be used for an advantageous purpose.

[0153] The present invention also provides a control system that can control a device, apparatus, or system, or perform the methods or processes described herein. Furthermore, the present invention provides a computer program product that, when functionally coupled to or executed on a computer included in a device, apparatus, or system, controls one or more controllable elements of such a device, apparatus, or system.

[0154] The present invention is further applied to devices, apparatuses, or systems that include one or more characterizing features described in the specification and / or shown in the accompanying drawings. The invention also relates to a method or process that includes one or more characterizing features described in the specification and / or shown in the accompanying drawings.

[0155] The various aspects discussed in this patent can be combined to provide additional advantages. Furthermore, those skilled in the art will understand that embodiments can be combined, and more than two embodiments can be combined. Additionally, some features can form the basis for one or more partial applications.

Claims

1. A light generating system (1000) comprising (i) a plurality of light sources, (ii) a first luminescent material (210), and (iii) a second luminescent material (220), wherein: - a first light source (110) configured to generate first light source light (111) having one or more wavelengths in a blue wavelength range and having a first centroid wavelength (l C1 ), wherein the first light source (110) comprises a laser; - the first luminescent material (210) is configured to convert at least part of the first light source light (111) into first luminescent material light (211), the first luminescent material light (211) having one or more wavelengths in a green and / or yellow wavelength range; - a second light source (120) configured to generate second light source light (121), the second light source light (121) having one or more wavelengths in a yellow and / or orange wavelength range and having a second center wavelength (l C2 ), wherein l C2 > l C1 ; wherein the second light source (120) comprises a superluminescent diode; - the second luminescent material (220) is configured to convert at least part of the second light source light (121) into second luminescent material light (221), the second luminescent material light (221) having one or more wavelengths in an orange and / or red wavelength range; and - in an operational mode, the light generating system (1000) is configured to generate system light (1001), the system light (1001) comprising the first luminescent material light (211) and the second luminescent material light (221).

2. The light generating system (1000) according to claim 1, comprising a third light source (130) configured to generate third light source light (131), the third light source light (131) having one or more wavelengths in a blue wavelength range; wherein in the operational mode, the light generating system (1000) is configured to generate white system light (1001), the white system light (1001) comprising the third light source light (131), the first luminescent material light (211) and the second luminescent material light (221).

3. The light generating system (1000) according to claim 2, wherein the third light source (130) comprises one or more of a laser and a superluminescent diode.

4. The light generating system (1000) according to claim 1, wherein the first luminescent material (210) comprises a luminescent material of the type A3B50i0i2:Ce, wherein A comprises one or more of Y, La, Gd, Tb and Lu, and wherein B comprises one or more of Al, Ga, In and Sc, and / or wherein the first luminescent material (210) comprises a luminescent material of the type A3Si6N8:Ce 12 . 11 . 3+ . wherein A comprises one or more of La and Y.

5. The light generating system (1000) according to any one of claims 1-4, comprising a ceramic body (1210), wherein the ceramic body (1210) comprises the first luminescent material (210).

6. The light generating system (1000) according to any one of claims 1-4, wherein the second luminescent material (220) comprises a luminescent material selected from the group consisting of: MS:Eu 2+ wherein M comprises one or more of calcium and strontium; M2Si5N8:Eu 2+ wherein M comprises one or more of calcium, strontium and barium; MAlSiN3:Eu 2+ wherein M comprises one or more of calcium and strontium; MLi2Al2O2N2:Eu 2+ wherein M comprises strontium; MLiAl3N4:Eu 2+ wherein M comprises strontium; MCaSiN2:Ce 3+ wherein M comprises one or more of calcium and strontium; and M(Si,Al)N2:Ce 3+ wherein M comprises calcium.

7. The light generating system (1000) according to any one of claims 1-4, wherein the first light source (110) is configured to generate first light source light (111) having one or more wavelengths in a 440-495 nm wavelength range, wherein the second light source (120) is configured to generate second light source light (121) having one or more wavelengths in a 570-620 nm wavelength range; wherein the first luminescent material (210) is configured to convert at least part of the first light source light (111) into first luminescent material light (211) having one or more wavelengths in a 495-590 nm wavelength range, and wherein the second luminescent material (220) is configured to convert at least part of the second light source light (121) into second luminescent material light (221) having one or more wavelengths in a 610-665 nm wavelength range.

8. The light generating system (1000) according to any one of claims 1-4, wherein the first light source (110) is configured to generate first light source light (111) having a centroid wavelength in the wavelength range of 440-495 nm, wherein the second light source (120) is configured to generate second light source light (121) having a centroid wavelength in the wavelength range of 570-620 nm; wherein the first luminescent material (210) is configured to convert at least part of the first light source light (111) into first luminescent material light (211) having a centroid wavelength in the wavelength range of 495-590 nm, and wherein the second luminescent material (220) is configured to convert at least part of the second light source light (121) into second luminescent material light (221) having a centroid wavelength in the wavelength range of 610-665 nm.

9. The light generating system (1000) according to any one of claims 1-4, wherein one or more of the first luminescent material (210) and the second luminescent material (220) is operated in reflective mode.

10. The light generating system (1000) according to any one of claims 1-4, wherein one or more of the first luminescent material (210) and the second luminescent material (220) is operated in transmissive mode.

11. The light generating system (1000) according to any one of claims 1-4, comprising one or more light combining elements (420) configured to combine at least the first luminescent material light (211) and the second luminescent material light (221) in the operational mode.

12. The light generating system (1000) according to any one of claims 1-4, wherein the first luminescent material (210) and the second luminescent material (220) are supported by a thermally conductive support (500).

13. The light generating system (1000) according to claim 12, comprising an integrated light source package (600), wherein the integrated light source package (600) comprises a common support member (610) configured to support the plurality of light sources, the first luminescent material (210) and the second luminescent material (220), wherein common support member (610) comprises the thermally conductive support (500).

14. The light generating system (1000) according to any one of claims 1-4, comprising a control system (300) configured to individually control (i) one or more of the one or more first light sources (110) and (ii) one or more of the one or more second light sources (120), thereby controlling a spectral power distribution of the system light (1001).

15. A light generating device (1200), the light generating device (1200) selected from the group consisting of a lamp, a luminaire, a projection device, a disinfection device, and an optical wireless communication device comprising the light generating system (1000) according to any one of claims 1-4.

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