Lighting apparatus comprising two pc-led and two devices comprising phosphor particles

Abstract

The invention provides a light generating system comprising a first solid state light source, a first light emitting device, a second solid state light source and a second light emitting device wherein: (I) the first solid state light source comprises a first light emitting surface having a first surface area SA1; wherein the first solid state light source is configured to generate first light source light; (II) a first light emitting device configured in physical contact with at least a portion of the first light emitting surface; wherein the first light emitting device is configured to convert at least a portion of the first light source light into first light emitting device light; wherein the first light emitting device comprises a first luminescent material configured to convert at least a portion of the first light source light into first luminescent material light; wherein the first light emitting device light comprises first luminescent material light; (III) the second light source comprises a second light emitting surface having a second surface area SA2; wherein the second light source is configured to generate second light source light; (IV) a second light emitting device configured in physical contact with at least a portion of the second light emitting surface; wherein the second light emitting device is configured to convert at least a portion of the second light source light into second light emitting device light; wherein the second light emitting device comprises a second luminescent material configured to convert at least a portion of the second light source light into second luminescent material light; wherein the second light emitting device light comprises second luminescent material light; (V) the first luminescent material comprises a first manganese-based luminescent material comprising a luminescent material of the type doped with tetravalent manganese; wherein the second luminescent material comprises a second manganese-based luminescent material, the second manganese-based luminescent material comprising a luminescent material of the type doped with tetravalent manganese; wherein M comprises an alkaline earth cation, M'comprises an alkaline cation, x is in the range of 0-1, A comprises a tetravalent cation, and wherein X comprises a monovalent anion comprising at least fluorine, (VI) the first light emitting device and the second light emitting device are different.

Description

Technical Field

[0001] This invention relates to a light generating system. It also relates to a lighting device including such a light generating system. Background Technology

[0002] Light emitters including phosphors are known in the art. For example, US2018231191A1 describes an illumination system comprising first and second light-emitting diodes. The first and second light-emitting diodes have different peak wavelengths and emit light of the same color. The system also includes a third light-emitting diode that emits light of a different color than the first and second light-emitting diodes. A wavelength conversion element is disposed in the path of the light emitted by the first and second light-emitting diodes. Summary of the Invention

[0003] Including transition metal ions Mn 4+ Existing systems using activated fluoride-based luminescent materials (or phosphors) exhibit high luminous efficiency. Therefore, it may be desirable to use such luminescent materials in high-brightness lighting generation systems, particularly to provide optimal (specific) luminous flux. Additionally or alternatively, it may be desirable to provide light generation systems with tunable color temperature and / or tunable spectral characteristics. Note that such luminescent materials can have relatively low absorption, limited scattering, and sensitivity to quenching / degradation.

[0004] However, it is particularly desirable to configure the lighting system so that the optical and spectral characteristics of the light-generating system can be controlled. Furthermore, the luminescent material can generate heat during light conversion. Therefore, improved thermal management is also desirable. Thus, one aspect of the present invention is to provide an alternative light-generating system that preferably further eliminates at least partially one or more of the aforementioned disadvantages. The object of the present invention is to overcome or improve at least one disadvantage of the prior art, or to provide a useful alternative.

[0005] The invention is set forth in the set of appended independent and dependent claims.

[0006] According to a first aspect, the present invention provides a light generating system comprising a first solid-state light source, a first light-emitting device, a second solid-state light source, and a second light-emitting device. In embodiments, the first solid-state light source (or "first light source") may include a first light-emitting surface having a first surface area SA1. Specifically, the first light source may be configured to generate first light source light (emitted from the first light-emitting surface during operation of the first light source). In another embodiment, the first light source light may include blue light. In embodiments, the first light-emitting device may be configured to physically contact at least a portion of the first light-emitting surface. Specifically, the first light-emitting device may be configured to convert at least a portion of the first light source light into first light-emitting device light. Furthermore, in embodiments, the first light-emitting device may include a first light-emitting material configured to convert at least a portion of the first light source light into first light-emitting material light. In other embodiments, the first light-emitting device light includes first light-emitting material light. In embodiments, the second solid-state light source (or "second light source") may include a second light-emitting surface having a second surface area SA2. Specifically, the second light source may be configured to generate second light source light (emitted from the second light-emitting surface during operation of the second light source). In another embodiment, the second light source light may include blue light. Furthermore, in embodiments, the second light-emitting device can be configured to physically contact at least a portion of the second light-emitting surface. Specifically, the second light-emitting device can be configured to convert at least a portion of the light from the second light source into light from the second light-emitting device. Furthermore, in embodiments, the second light-emitting device may include a second light-emitting material configured to convert at least a portion of the light from the second light source into light from the second light-emitting material. Specifically, the light from the second light-emitting device may include light from the second light-emitting material. Furthermore, in embodiments, the first light-emitting material may include a first manganese-based light-emitting material, which includes light doped with tetravalent manganese. The second luminescent material can be a type of light-emitting material. Similarly, in embodiments, the second luminescent material may include a second manganese-based luminescent material, which includes materials doped with tetravalent manganese. The light-emitting material is of this type. In this document, M comprises an alkaline earth cation, M' comprises a basic cation, x is in the range of 0-1, A comprises a tetravalent cation, and X comprises a monovalent anion, including at least fluorine. Furthermore, the first and second light-emitting devices may differ in one or more of the following aspects in the embodiments: (a) doped with tetravalent manganese... (b) Volume average particle size of luminescent materials of type, doped with tetravalent manganese The type of luminescent material, manganese dopant concentration, and (c) component type. In embodiments, the following can be applied: Alternative sites can be applied. ,For example Therefore, in a specific embodiment, the present invention provides a light generation system comprising a first solid-state light source, a first light-emitting device, a second solid-state light source, and a second light-emitting device, wherein: (I) the first light source includes a first light-emitting surface having a first surface area SA1; wherein the first light source is configured to generate first light source light (which is emitted from the first light-emitting surface during operation of the first light source) (wherein the first light source light includes blue light); (II) the first light-emitting device is configured to physically contact at least a portion of the first light-emitting surface; wherein the first light-emitting device is configured to convert at least a portion of the first light source light into first light-emitting device light; wherein the first light-emitting device includes a first light-emitting material, the first light-emitting material being configured to convert at least a portion of the first light source light into first light-emitting material light; wherein the first light-emitting device light... The light source includes: (III) a second light source comprising a second light-emitting surface having a second surface area SA2; wherein the second light source is configured to generate second light source light (which is emitted from the second light-emitting surface during operation of the second light source) (wherein the second light source light includes blue light); (IV) a second light-emitting device configured to physically contact at least a portion of the second light-emitting surface; wherein the second light-emitting device is configured to convert at least a portion of the second light source light into second light-emitting device light; wherein the second light-emitting device includes a second light-emitting material, the second light-emitting material being configured to convert at least a portion of the second light source light into second light-emitting material light; wherein the second light-emitting device light includes second light-emitting material light; (V) the first light-emitting material includes a first manganese-based light-emitting material, the first manganese-based light-emitting material including light doped with tetravalent manganese. Types of luminescent materials; wherein the second luminescent material includes a second manganese-based luminescent material, the second manganese-based luminescent material including those doped with tetravalent manganese The type of luminescent material; wherein M comprises an alkaline earth cation, M' comprises a basic cation, x is in the range of 0-1, A comprises a tetravalent cation, and X comprises a monovalent anion, comprising at least fluorine; (V) the first luminescent device and the second luminescent device differ in one or more of the following aspects: (a) doped with tetravalent manganese (a) Volume average particle size of the luminescent material; (b) Doped with tetravalent manganese The manganese dopant concentration of the type of luminescent material, and (c) component type; and (VI) optional In this manner, the present invention can provide a lighting device comprising two pc-LEDs and two (light-emitting) devices comprising phosphor particles. Note that the term pc-LED can refer to "phosphor-converted LED," wherein a coating or layer of light-emitting material, for example, can be applied to the light-emitting surface of the light source. These aspects are further defined below.

[0007] This light generation system may include at least two light sources (each with a different surface area of ​​a different luminescent surface) and at least two types of luminescent devices. Specifically, the luminescent devices can be easily combined with the light sources (particularly blue light sources) to generate white light (e.g., by mixing blue light and yellow (luminescent material) light). Note that in embodiments, the two light sources may differ in the centroid wavelength of the generated light. Furthermore, depending on the luminescent device, the centroid wavelength of the converted luminescent device light may also differ. Therefore, by utilizing two different types of light sources and two different types of luminescent devices, the percentage contribution of blue light to the generated light and / or the percentage contribution of luminescent material light to the generated light can be controlled (individually). In this way, in embodiments, the correlated color temperature (CCT) of the provided light can be controlled. Furthermore, by combining device light from (at least) two light sources and (at least) two luminescent materials using this light generation system, an improved color rendering index (CRI) can be provided. Additionally, the degree of conversion from device light to luminescent material light can be controlled by changing the dopant concentration and / or the volume-average particle size of the luminescent material. By changing the above parameters, the spectral characteristics of the light generated by the system can be controlled.

[0008] It should also be noted that the present invention may include two light sources, the luminescent surface areas of which may differ. Two light sources with different surface areas may be relatively inexpensive than two large light sources with the same luminescent surface area. However, this configuration can also provide a uniform spotlight with a relatively limited contouring effect in a spotlight. Furthermore, using luminescent surface areas of different sizes allows for the control of the (optical) properties of the system light and / or allows for the efficient application of phosphors of different particle sizes. Other advantages may include improved thermal management. Since the light sources can be mounted on the same substrate (e.g., a printed circuit board (PCB)), it may be desirable to prevent uneven heating of the substrate. This can be limited (or completely prevented) by the choice of component type; for example, a light-emitting device comprising a ceramic body can help conduct and diffuse heat over a large surface area, thereby preventing the formation of localized hot spots.

[0009] As described above, the light generation system includes a first solid-state light source, a first light-emitting device, a second solid-state light source, and a second light-emitting device. The features of the invention are discussed below in the embodiments.

[0010] In embodiments, the first light source can generate first light source light. Furthermore, in embodiments, the first light source may include a first emitting surface having a first surface area SA1. The emitting surface may specifically refer to the surface of the first light source through which the first light source light can be emitted (or escaped) during operation. Typically, in embodiments, the first light source light may include blue light. However, the first light source is not limited to generating blue light, and in other embodiments, the first light source light may (and may also) include light from other wavelength ranges.

[0011] Similar to the first light source, the second light source can be configured to generate second light. In an embodiment, the second light source may include a second emitting surface having a second surface area SA2. Specifically, the second light may be emitted (or emitted) from the second emitting surface during operation of the second light source. In another embodiment, the second light may include blue light. Like the first light source, the second light source is not limited to generating blue light, and in other embodiments, the second light may also include light from other wavelength ranges, such as violet, green, yellow, orange, and red light. However, specifically, the first light source and / or the second light source are configured to generate blue (first and / or second, respectively) light.

[0012] 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 having both 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, for example, about 590-600 nm. 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 with one or more intensities at least at those one or more wavelengths within the indicated wavelength range. For example, a blue-emitting solid-state light source would have a spectral power distribution with intensities at one or more wavelengths in the wavelength range of 440-495 nm.

[0013] Furthermore, in embodiments, the first light-emitting device can be configured to convert at least a portion of the light from the first light source into light from the first light-emitting device. Therefore, the first light-emitting device can be configured to receive light from the first light source. In embodiments, at least a portion of the light from the first light source can be coupled out via the first light-emitting device. Specifically, the first light-emitting device may include a first light-emitting material, which is configured to convert at least a portion of the light from the first light source into light from the first light-emitting material. Furthermore, the first light-emitting device light may particularly include light from the first light-emitting material.

[0014] The luminescent material can at least partially convert a first radiation (e.g., blue light) into a second radiation (e.g., yellow light). Specifically, the second radiation can have a different spectral distribution than the first radiation. During operation, a portion of the first radiation can be transmitted without conversion, and another portion of the first radiation can undergo conversion to the second radiation. Therefore, the resulting radiation can be a combination of the first and second radiations. For example, a certain percentage of blue light can undergo conversion to yellow light (and the remainder can remain unconverted blue light), and thus white light (including both blue and yellow light) can be provided. A detailed explanation and description of suitable luminescent materials are also provided below.

[0015] In an embodiment, the first emitting surface may be an epitaxial surface of a first light source. Similarly, in an embodiment, the second emitting surface may be an epitaxial surface of a second light source. Epitaxy can refer to the deposition of a capping layer on a substrate, typically a crystalline substrate. The capping layer is called an epitaxial film, epitaxial surface, or epitaxial layer. In particular, epitaxy can improve the performance of light sources, especially solid-state light sources. By depositing a doped epitaxial surface on a heavily doped silicon substrate, a higher breakdown voltage across the collector-substrate junction can be achieved while maintaining a low collector resistance. Therefore, in a particular embodiment, the first emitting surface is an epitaxial surface of a first solid-state light source, and the second emitting surface is an epitaxial surface of a second solid-state light source.

[0016] In one embodiment, a first light source may be disposed on a substrate, and a first light-emitting device may be disposed on at least a portion of a first light-emitting surface. Similarly, in one embodiment, a second light source may be disposed on a substrate, and a second light-emitting device may be disposed on at least a portion of a second light-emitting surface. Note that in one embodiment, the substrate may be a printed circuit board (PCB). Furthermore, in one embodiment, the first (solid-state) light source and the second (solid-state) light source are functionally coupled to the same printed circuit board (PCB). Here, the term "functionally coupled" refers to attaching an electrical component, such as a light source, to the PCB such that the electrical component is physically fixed to the PCB and powered via the PCB. In another embodiment, the PCB may facilitate the control of the electrical component and / or the operation of the electrical component in one or more operating modes. In this way, the first and second light sources can be optimally positioned to distribute heat on the printed circuit board. This can facilitate better thermal management of the light generation system.

[0017] In some embodiments, the first light-emitting device may be configured to physically contact at least a portion of the first light-emitting surface. In some embodiments, the first light-emitting material may be disposed on only a portion of the first light-emitting surface. In some embodiments, the first light-emitting device may cover at least 60%, for example, at least 75%, particularly at least 90%, of the first light-emitting surface. However, in other embodiments, the surface of the first light-emitting material may also be disposed over the entire surface area of ​​the first light-emitting surface. This can provide the benefit of controlling the percentage of first light source light converted into light from the first light-emitting device.

[0018] Similar to the first light-emitting device, the second light-emitting device can be configured to convert at least a portion of the light from the second light source into second light-emitting device light. Therefore, the second light-emitting device can be configured to receive light from the second light source. Note that in embodiments, at least a portion of the light from the second light source can be coupled out via the second light-emitting device. Specifically, the second light-emitting device may include a second light-emitting material configured to convert at least a portion of the light from the second light source into second light-emitting material light. Furthermore, the second light-emitting device light may include second light-emitting material light. Additionally, in embodiments, the light-generating system may include a second light-emitting device configured to physically contact at least a portion of the second light-emitting surface. As with the first light-emitting device, the surface area of ​​the second light-emitting surface on which the second light-emitting device is disposed can vary. In some embodiments, the second light-emitting device may be disposed only on a portion of the second light-emitting surface. In embodiments, the second light-emitting device may cover at least 60%, for example, at least 75%, particularly at least 90%, of the second light-emitting surface. In other embodiments, the second light-emitting device may also cover the entire surface of the second light-emitting surface. Note that the general term "light-emitting material" can refer to both the first and second light-emitting materials. Similarly, the general term "light-emitting device" can be applied to both the first and second light-emitting devices.

[0019] In another embodiment, the first luminescent material may include a first manganese-based luminescent material, which includes materials doped with tetravalent manganese. The second luminescent material can also include a second manganese-based luminescent material, which includes materials doped with tetravalent manganese. Luminescent materials of this type. Here, M includes alkaline earth cations, M' includes basic cations, x is in the range of 0-1, A includes tetravalent cations, and X includes monovalent anions, including at least fluorine.

[0020] The first light-emitting device and the second light-emitting device can differ in many different ways. In summary, the first light-emitting device and the second light-emitting device differ in one or more of the following aspects: (a) doped with tetravalent manganese. (a) Volume average particle size of the luminescent material; (b) Doped with tetravalent manganese The concentration of manganese dopant in the type of luminescent material, and (c) the component type.

[0021] Here, the first and second light-emitting devices can be particularly suitable for materials doped with tetravalent manganese. The volume-average particle size varies among different types of luminescent materials. The term volume-average particle size is known in the art. Volume-average particle size takes into account the volume contribution of each particle in calculations. For example, relatively larger particles may have a greater influence on determining the (volume)-average particle size compared to relatively smaller particles. Changing the particle size can, in particular, provide control over the degree of light scattering. Specifically, smaller particles can provide relatively higher light scattering compared to larger particles. The equivalent spherical diameter (or ESD) of an (irregularly shaped) object is the diameter of a sphere with an equivalent volume. Therefore, the equivalent spherical diameter (ESD) of a cube with side a is 2. a If a sphere of diameter D in the xyz coordinate system is deformed into any other shape (in the xyz plane) without changing its volume, then the equivalent sphere diameter of that shape is D.

[0022] In another embodiment, the first light-emitting device and the second light-emitting device may differ in one or more of their (other) features or parameters. In particular, the first light-emitting device and the second light-emitting device may be doped with tetravalent manganese. The dopant concentrations differ between the types of luminescent materials. In embodiments, the dopant concentration is at most 20%, for example, at most 15%, and particularly at most 10%, of the total molar amount of type A elements (i.e., tetravalent cations) in the first and second luminescent materials, and is composed of tetravalent manganese. Furthermore, in embodiments, the dopant concentration is at least 0.1%, for example, at least 0.5%, and particularly at least 1%, of the total molar amount of type A elements (i.e., tetravalent cations) in the first and second luminescent materials, and is composed of tetravalent manganese. Dopant concentration may specifically refer to molar concentration or molar percentage, which can be determined from the following m-value (i.e., relative to the volume of the luminescent device, ...). m The light source is derived from 100% doped with tetravalent manganese. The percentage of the first light converted to light from the first luminescent material can depend on the concentration of manganese dopant in the first luminescent material. Similarly, the percentage of the second light source converted to light from the second luminescent material can depend on the concentration of manganese dopant in the second luminescent material. In embodiments, the second manganese-based luminescent material may include at least 0.2 percentage points (or percentage points) more manganese than the first manganese-based luminescent material, for example, at least 0.5 percentage points, particularly at least 1 percentage point. Thus, in a specific embodiment, 0.1-15% of the light source consists of tetravalent manganese relative to the total molar amount of type A elements in the luminescent material, wherein the second manganese-based luminescent material includes at least 0.2 percentage points more manganese than the first manganese-based luminescent material. Typically, a higher manganese dopant concentration can provide a relatively shorter optical path for the light transmitted through the luminescent device, thus enabling a higher percentage conversion of the light source light to the luminescent material light.

[0023] Additionally or alternatively, in this embodiment, the concentration of manganese dopant can be selected according to the size of the light-emitting device. Specifically, the first light-emitting device and the second light-emitting device can each have a first layer thickness (H1) and a second layer thickness (H2). In another embodiment, the first layer thickness (H1) can be greater than the second layer thickness (H2). Specifically, it can be applied... ,For example Especially Alternatively, in an embodiment, the thickness of the first layer (H1) may be less than the thickness of the second layer (H2). Specifically, it can be applied... ,For example Especially In a particular embodiment, the first light-emitting device has a first layer thickness (H1), and the second light-emitting device has a second layer thickness (H2), wherein... or Note that light-emitting devices with relatively low thickness may require relatively high concentrations of manganese dopant to achieve sufficient absorption (and subsequent conversion into light by the luminescent material).

[0024] Furthermore, in the embodiments, the first light-emitting device and the second light-emitting device may differ in component type. In the embodiments, the component type may be selected from the group consisting of: (i) an encapsulation comprising particulate light-emitting material, (ii) a layer comprising particulate light-emitting material, and (iii) a ceramic body comprising light-emitting material, a glass body comprising light-emitting material, or a single crystal comprising light-emitting material. Descriptions of the different component types are given below. Therefore, in the embodiments, the term "light-emitting device" may refer to an encapsulation, a layer, or a ceramic body. The term "encapsulation comprising particulate light-emitting material" may, for example, refer to a dome or a body. The term "layer comprising particulate light-emitting material" may refer to a layer provided as a layer, optionally including other materials such as the encapsulation. Light-emitting material layers are known in the art.

[0025] As described above, the surface areas of the first light-emitting surface and the second light-emitting surface can be different. In an embodiment, the first surface area SA1 (of the first light-emitting surface) can be larger than the second surface area SA2 (of the second light-emitting surface). Specifically, it is possible to apply... ,For example Especially Furthermore, in embodiments, the first light-emitting surface may have one or more dimensions of at least 300 μm, for example at least 600 μm, and particularly at least 1000 μm. Therefore, in embodiments, the first light-emitting surface may have a size of at least 300 × 300 μm. 2 The size, for example, at least 600×600μm 2 Especially at least 1000×1000μm 2 The second light-emitting surface can have one or more dimensions up to 300 μm, for example, up to 200 μm, and particularly up to 100 μm. Therefore, in embodiments, the second light-emitting surface can have a maximum size of 200 × 200 μm. 2 For example, at most 100×100μm 2 Especially at most 50×50μm 2 The dimensions are as follows. Note that the first emitting surface and / or the second emitting surface are not limited to a square cross-section. For example, the first emitting surface may have dimensions of 300 × 300 μm. 2 A square cross-section, or alternatively even one with dimensions of 500 × 1000 μm. 2 The rectangular cross-section. Similarly, the second emitting surface can have a size of 200 × 200 μm. 2 A square cross-section, or alternatively even one with dimensions of 75 × 150 μm. 2 The rectangular cross-section. In a particular embodiment, the first emitting surface has one or more dimensions of at least 300 μm, and the second emitting surface has one or more dimensions of a maximum of 100 μm, and wherein... However, in other embodiments, the first surface area SA1 can (also) be smaller than the second surface area SA2. Specifically, it can be applied... ,For example Especially However, in certain embodiments, the cross-sectional dimensions of the first and second luminescent surfaces can be selected from the range of 20 μm to 20 mm, although other values ​​may also be chosen. Furthermore, in certain embodiments, the surface area of ​​the cross-sections of the first and second luminescent surfaces can be selected from 400 μm. 2 -400mm 2 The range is specified, but other values ​​can also be selected.

[0026] Some additional configurations of the light generation system are discussed below in the embodiments.

[0027] In embodiments, the first and second light-emitting devices may be selected individually from the group consisting of an encapsulation comprising particulate light-emitting material and a layer comprising particulate light-emitting material. The encapsulation may comprise a matrix material in which particulate light-emitting material may be embedded. Specifically, in the encapsulation, the light-emitting particles may be dispersed within the matrix material. In another embodiment, at least a portion of the first light source and / or at least a portion of the second light source may be encapsulated individually by the encapsulation. In embodiments, the layer may be a layer comprising a dispersion of light-emitting particles. Specifically, the layer (comprising particulate light-emitting material) may be applied individually to at least a portion of the light-emitting surface of the first light source and / or at least a portion of the surface of the second light source. In another embodiment, the layer itself may not be applied to the surface (at least a portion) of the light source (i.e., the first and / or second light source), but rather the layer may be embedded in the encapsulation and subsequently applied to the light source (at least a portion). This configuration (i.e., a layer embedded in the encapsulation) allows for a more uniform volumetric particle dispersion within the encapsulation.

[0028] Furthermore, in embodiments including an encapsulation (including particulate luminescent material) and / or a layer (including particulate luminescent material), the particulate luminescent material may include a manganese-based luminescent material. That is, the first luminescent device may include a first manganese-based luminescent material. Furthermore, in embodiments, the first manganese-based luminescent material may have a volume average particle size D1. In embodiments, D1 may be at least 5 μm, for example at least 7.5 μm, particularly at least 10 μm. Furthermore, in embodiments, D1 may be at most 100 μm, for example at most 50 μm, particularly at most 40 μm. Similarly, in embodiments, the second luminescent material may include a second manganese-based luminescent material. In particular, the second luminescent device may include a second volume average particle size D2. In embodiments, D2 may be at most 5 μm, for example at most 2 μm, particularly at most 1 μm. Furthermore, in embodiments, D2 may be at least 20 nm, for example at least 50 nm, particularly at least 100 nm. In certain embodiments, And among them Furthermore, in the embodiments, the following can be applied: ,For example ,in particular More especially In a specific embodiment, the component types of the two light-emitting devices are selected from the group consisting of (i) an encapsulation comprising particulate light-emitting material and (ii) a layer comprising particulate light-emitting material; wherein the first manganese-based light-emitting material has a first volume average particle size D1, and the second manganese-based light-emitting material has a second volume average particle size D2, wherein D1 / D2 ≥ 2. By utilizing the larger particle size, a lower percentage of light scattering can be achieved in the first light-emitting device compared to the second light-emitting device. In this way, the optical properties of the light coupled from the light-generating system can be controlled.

[0029] As described above, in the embodiments, the first light-emitting device may be constructed differently from the second light-emitting device. In other embodiments, one of two cases may be applied. In the first case, in the embodiments, the first light-emitting device includes a first ceramic body, a first glass body, or a first single crystal having a first manganese-based luminescent material, and the second light-emitting device includes a component type selected from the group consisting of (i) an encapsulation comprising particulate luminescent material and (ii) a layer comprising particulate luminescent material. Alternatively, in the second case, in the embodiments, the second light-emitting device includes a second ceramic body, a second glass body, or a second single crystal having a second manganese-based luminescent material, and the first light-emitting device includes a component type selected from the group consisting of (i) an encapsulation comprising particulate luminescent material and (ii) a layer comprising particulate luminescent material. Therefore, several configurations of the light-generating system are possible depending on the desired optical characteristics and thermal management. Using ceramic bodies, glass bodies, and single crystals, a larger (geometric) volume can be obtained (compared to encapsulations and / or layers). This facilitates the configuration of larger luminescent particles in the light-emitting device, which can provide higher absorption and relatively lower light scattering from the source. In addition, one of two options can be chosen to provide improved thermal management of the light-generating system, such as achieving a lower overall operating temperature.

[0030] Returning to aspects and characteristics related to one or more types of luminescent materials configured in a light-generating system, a description of luminescent materials is provided below. Note that the general term "luminescent material" can refer to a first luminescent material and / or a second luminescent material.

[0031] The general term "luminescent material" specifically refers to a material that can convert 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 a wavelength greater than the first radiation, which is the case in so-called down-conversion. However, in certain embodiments, the second radiation has a spectral power distribution with intensity at a wavelength less than the first radiation, which is the case in so-called up-conversion. In embodiments, "luminescent material" may specifically refer to a material that can convert 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 with 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 with a larger wavelength is converted into radiation with a smaller wavelength (λ). ex >λ em In embodiments, the term "luminescence" may refer to phosphorescence. In embodiments, the term "luminescence" may also refer to fluorescence. Instead of the term "luminescence," the terms "luminescent material light" or "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 shown below. Therefore, the term "luminescent material" in specific embodiments may also refer to a luminescent material composition. The term "phosphorescent" may also be used instead of the term "luminescent material." These terms are known to those skilled in the art.

[0032] 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 nitrogen oxides or nitrogen silicates, etc. Alternatively or additionally, the luminescent material may be selected from silicates, particularly silicates doped with divalent europium.

[0033] In a particular embodiment, the first luminescent material and / or the second luminescent material (individually) comprises materials selected from the type of The luminescent material, 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. In particular, A may comprise one or more of Y, Gd, and Lu, such as particularly one or more of Y and Lu. In particular, 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 particularly include... Garnet, wherein A comprises at least yttrium (Y) or lutetium (Lu), and wherein B comprises at least aluminum (Al). This garnet may be doped with cerium (Ce), praseodymium (Pr), or a combination of cerium and praseodymium; however, it is particularly doped with Ce. Specifically, B may comprise aluminum (Al); however, in addition to aluminum, B may also partially comprise gallium (Ga) and / or scandium (Sc) and / or indium (In), particularly up to about 20% B, more particularly up to about 10% B (i.e., the B ions are essentially composed of 90 or greater 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 replaced by Si and N. Element A may be particularly selected from the group consisting of yttrium (Y), gadolinium (Gd), terbium (Tb), and lutetium (Lu). Furthermore, Gd and / or Tb are present specifically only in amounts up to about 20% of A. In a specific embodiment, the garnet luminescent material comprises , 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., in garnet: a portion of the "A" ions) 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 generally replace no more than 10% of A; typically, the concentration of Ce (relative to A) is 0.1-4%, particularly 0.1-2%. Assuming 1% Ce and 10% Y, the perfectly correct molecular formula could be... Ce in garnet is essentially or only in the trivalent state, as is known to those skilled in the art.

[0034] In a particular embodiment, the first luminescent material and / or the second luminescent material (individually) include materials of type [missing information]. The primary luminescent material and type are The secondary luminescent material, wherein A' comprises one or more of La, Gd, and Tb, wherein B comprises one or more of Al, Ga, In, and Sc; and wherein: (I) ; and (II) and And (III) and In embodiments, the secondary light-emitting material may therefore include more Lu in molar quantities than the primary light-emitting material. Furthermore, in embodiments, the primary light-emitting material may include more Y in molar quantities than the secondary light-emitting material. In the embodiment, x 12 It can be equal to zero. Furthermore, in the embodiments, x... 12 x 13 and x 23 One or more of them can be equal to zero. In the embodiment, x 14 It can be equal to x 24 However, in the embodiments, x 14 It can be different from x 24 , where x 14 and x 24 Both can each be selected from the range of 0.001-0.1. Therefore, in embodiments, the luminescent material may include, for example, (in ) primary light-emitting materials and such (in ) of the secondary luminescent materials, among which And in a particular embodiment Therefore, in specific embodiments, the luminescent material may include at least two types of... The luminescent material, wherein: (a) in moles, this type of primary luminescent material may contain more Y than this type of secondary luminescent material, and (b) in moles, this type of secondary luminescent material may contain more Lu than this type of primary luminescent material.

[0035] The term "tetravalent manganese" refers to Mn 4+ This is a well-known luminescent ion. In the molecular formula described above, a portion of the tetravalent cation A (such as Si) is replaced by manganese. Therefore, doped with tetravalent manganese... It can also be expressed as The molar percentage of manganese, i.e., the percentage of its substitution for tetravalent cation A, is typically 0.1-15%, particularly 1-12%, i.e., m is 0.001-0.15, particularly 0.01-0.12.

[0036] A comprises a tetravalent cation and preferably comprises at least silicon. A may optionally (also) comprise one or more of titanium (Ti), germanium (Ge), tin (Sn), and zinc (Zn). Preferably, at least 80%, and even more preferably at least 90%, for example at least 95%, of M is composed of silicon. Therefore, in one specific embodiment, It can also be described as Where m and x are as described above, and where t, g, s, zr are each preferably independently in the range of 0-0.2, particularly 0-0.1, even more particularly 0-0.05, where t+g+s+zr is less than 1, particularly equal to or less than 0.2, preferably in the range of 0-0.2, particularly 0-0.1, even more particularly 0-0.05, and where A is particularly Si. X is preferably fluorine (F).

[0037] As mentioned above, M relates to a monovalent cation, but preferably includes at least potassium and / or rubidium. Other monovalent cations that M may further include are lithium (Li), sodium (Na), cesium (Cs), and ammonium (NH4). + The group consists of potassium and / or rubidium. In one embodiment, preferably at least 80% (i.e., 80% of the total moles of type M), even more preferably at least 90%, for example 95% of M, is composed of potassium and / or rubidium. In particular, in these embodiments, x is therefore zero.

[0038] Therefore, in a specific embodiment, It can also be described as Where r is in the range of 0-1, and l, n, c, nh are each preferably independently in the range of 0-1, preferably 0-0.2, particularly 0-0.1, even more particularly 0-0.05, and where r + l + n + c + nh are in the range of 0-1, particularly l + n + c + nh are less than 1, particularly equal to or less than 0.2, preferably in the range of 0-0.2, particularly 0-0.1, even more particularly 0-0.05. X is preferably fluorine (F).

[0039] As described above, one or more alkaline earth cations may be present in addition to (or in addition to) basic cations. Therefore, in specific embodiments, It can also be described as Where k, r, l, n, c, and nh are each independently in the range of 0-1, and mg, ca, sr, and ba are each independently in the range of 0-1, and mg + ca + sr + ba + k + r + l + n + c + nh = 1. In the embodiment, k = 1, and the others (mg, ca, sr, ba, r, l, n, c, nh) are zero.

[0040] As described above, X relates to a monovalent anion, but includes at least fluorine. Other optional monovalent anions may be selected from the group consisting of chlorine (Cl), bromine (Br), and iodine (I). Preferably, at least 80%, and even more preferably at least 90%, for example 95%, of X is composed of fluorine. Therefore, in one specific embodiment, It can also be described as Wherein c1, b, and i are each independently preferably in the range of 0-0.2, particularly 0-0.1, and even more particularly 0-0.05, and wherein c1+b+i is less than 1, particularly equal to or less than 0.2, preferably in the range of 0-0.2, particularly 0-0.1, and even more particularly 0-0.05. In particular, X is essentially composed of F (fluorine).

[0041] therefore, It can also be described as The values ​​of r, 1, n, c, nh, m, t, g, s, zr, c1, b, and i are as described above. X is preferably fluorine (F).

[0042] Even more specifically, It can also be described as Where k, r, l, n, c, nh are each independently in the range of 0-1, where mg, ca, sr, ba are each independently in the range of 0-1, where mg + ca + sr + ba + k + r + l + n + c + nh = 1, and the values ​​of m, t, g, s, zr, c1, b, i are as described above. X is preferably fluorine (F).

[0043] In one embodiment, include (Also referred to herein as the KSiF system). As described above, in another preferred embodiment, include (That is, r = 0.5 and l, n, c, nh, t, g, s, zr, cl, b, i are 0) (This is also referred to as the K, Rb system). As mentioned above, some silicon is replaced by manganese (i.e., the molecular formula can also be described as...). or , where m is as described above, or and (Separately). Because manganese substitutes for a portion of the main lattice ions and has specific functions, it is also referred to as a "dopant" or "activator". Therefore, hexafluorosilicates are made with manganese (Mn). 4+ Doping or activation. In the following text, Also expressed as In a specific embodiment, the instruction is... It can refer to one or more of the following and One or more of the following: or In embodiments, the first luminescent material and / or the second luminescent material may include... Furthermore, in the embodiments, the first luminescent material and / or the second luminescent material may include... In certain embodiments, the first luminescent material and / or the second luminescent material may particularly include Alternatively or additionally, in embodiments, the first luminescent material and / or the second luminescent material may include From the above, it can be concluded that "Si, Ti" can represent one or more of Si and Ti. It can also be coated with luminescent materials, as described in WO2013121355A1.

[0044] Returning to the embodiments of the light generation system, in some embodiments, the light generation system may include a first light generation device. Specifically, the first light generation device may include a first solid-state light source and a first light-emitting device. Furthermore, in some embodiments, the light generation system may include a second light generation device. Specifically, the second light generation device may include a second solid-state light source and a second light-emitting device. In a particular embodiment, the light generation system may include both a first light generation device and a second light generation device. In some embodiments, the first light generation device may be configured to generate a first device light. Specifically, the first device light may be white light. Similarly, in some embodiments, the second light generation device may be configured to generate a second device light. Specifically, the second device light may be white light. Furthermore, in some embodiments, the first device light and the second device light may have a correlated color temperature difference of at least 500K. In this way, the CCT of the system light (including the first device light and the second device light) can be controlled in various ways. By controlling the operation of the first device light (e.g., brightness), the contribution of the first device light to the system light can be controlled in particular. Similarly, by controlling the operation of the second device light, the contribution of the second device light to the system light can be controlled in particular. For example, the primary first device can be configured to generate first device light with primary CCT T1, and the secondary first device can be configured to generate first device light with secondary CCT T2, wherein... In (other) embodiments, especially The term "white light" as used herein is known to those skilled in the art. This invention particularly relates to light having a correlated color temperature (CCT) between approximately 1500K and 20000K, for example between 1700K and 20000K, particularly between 700-20000K in Example 2, and especially in the range of approximately 1800K to 6500K for general illumination. Furthermore, in the embodiments, the correlated color temperature (CCT) is particularly within approximately 15 SDCM (standard deviation of color matching) from the blackbody track (BBL), particularly within approximately 10 SDCM from the BBL, and even more particularly within approximately 5 SDCM from the BBL. The terms CCT and CRI are known to those skilled in the art.

[0045] As described above, it may be desirable to control the spectral distribution of systemic light. This can be facilitated by controlling one or more different light sources. In a specific embodiment, the light generating system includes a control system configured to individually control the first light source and the second light source; wherein the control system is configured to control based on one or more of an input signal from a user interface, sensor signals (from sensors), and a timer.

[0046] The term "control" and similar terms specifically refer to at least determining the behavior of an element or monitoring the operation of an element. Therefore, "control" and similar terms here can refer, for example, to applying behavior to an element (determining behavior or monitoring the operation of the element), such as, for example, measuring, displaying, actuating, opening, shifting, changing temperature, etc. In addition, the term "control" and similar terms can also include monitoring. Therefore, the term "control" and similar terms can include applying behavior to an element and applying behavior to an element and monitoring the element. Control of the element can be accomplished 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 accomplished via wired and / or wireless control. The term "control system" can also refer to multiple different control systems, which are particularly functionally coupled, and where, for example, one control system can be a master control system, while 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. The control system can also be configured to receive and execute instructions from a remote controller. In this embodiment, the control system can be controlled via an app on the device, such as a portable device like a smartphone, iPhone, or tablet. Therefore, the device does not need to be coupled to the lighting system, but can be (temporarily) functionally coupled to it.

[0047] A system, apparatus, or device may perform actions in a “mode,” “operating mode,” “mode of operation,” or “operational mode.” The term “operational mode” may also refer to “control mode.” Similarly, in a method, actions, stages, or steps may be performed in a “mode,” “operating mode,” “mode of operation,” or “operational 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 performing a particular mode.

[0048] However, in embodiments, the control system may be available and is adapted to provide at least a control mode. If other modes are available, the selection of these modes can be performed, in particular, via a user interface, although other options, such as performing modes based on sensor signals or (time) schemes, are also possible. 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).

[0049] Therefore, in this embodiment, the control system can perform control based on one or more of the following: input signals from the user interface, sensor signals (from the sensors), and timers. The term "timer" can refer to a clock and / or a predetermined timing scheme.

[0050] As described above, a light generating system may include a first light source and a second light source. Specifically, the first light source may include a solid-state light source. In embodiments, the second light source may include a solid-state light source. The term "light source" may particularly refer to an LED (light-emitting diode). In specific embodiments, the light source includes a solid-state LED light source (e.g., an LED or a laser diode (or "diode laser")). The term "light source" may also refer to multiple light sources, such as 2-2000 (solid-state) LED light sources. Therefore, the term LED may also refer to multiple LEDs. Furthermore, the term "light source" in embodiments may also refer to a so-called chip-on-board (COB) light source. The term "light source" may also refer to a chip-scale package (CSP). A CSP may include a single solid-state die having a layer comprising a light-emitting material disposed thereon. The term "light source" may also refer to a medium-power package. A medium-power package may include one or more solid-state dies. The dies (multiple) may be covered by a layer comprising a light-emitting material. The die size may be equal to or less than 2 mm, for example, in the range of 0.2-2 mm. Therefore, in embodiments, the light source includes a solid-state light source. Furthermore, in specific embodiments, the light source includes a chip-scale package LED. In this document, the term "light source" may also specifically refer to small solid-state light sources, such as those having miniature or micro-sized dimensions. For example, a light source may include one or more of mini-LEDs and micro-LEDs. In particular, in embodiments, the light source includes micro-LEDs or "microLEDs" or "μLEDs". Here, the term miniature size or mini-LED specifically refers to a solid-state light source having dimensions (such as die size, especially length and width) selected from the range of 100μm to 1mm. Here, the term μ-size or micro-LED specifically refers to a solid-state light source having dimensions (e.g., die size, especially length and width) selected from the range of 100μm and smaller.

[0051] Furthermore, the term "light source" can refer to semiconductor light-emitting devices, such as light-emitting diodes (LEDs), laser diodes, resonant cavity light-emitting diodes (RCLEDs), vertical cavity laser diodes (VCSELs), edge-emitting lasers (EELs), photonic crystal surface-emitting lasers (PCSELs), vertical external cavity surface-emitting lasers (VECSELs), etc. The term "light source" can also refer to organic light-emitting diodes (OLEDs), such as passive matrix OLEDs (PMOLEDs) or active matrix OLEDs (AMOLEDs). In certain embodiments, the light source includes solid-state light sources (e.g., LEDs or laser diodes). In one embodiment, the light source includes an LED (light-emitting diode). The term "light source" or "solid-state light source" can also refer to superluminescent diodes (SLEDs). The term LED can also refer to multiple LEDs. The term "light source" can also refer to multiple (substantially identical (or different)) light sources, such as 2-2000 solid-state light sources. Therefore, here (in embodiments), the terms "solid-state light source" and "light source" can be substantially equivalent.

[0052] In embodiments, the light source can be configured to provide primary radiation that is used as is, such as a blue light source like a blue LED, a green light source like a green LED, and a red light source like a red LED. Such an LED, which may not include a luminescent material (“phosphor”), can be referred to as a direct-color LED. Therefore, in embodiments, the light-generating device may include a direct LED (i.e., phosphorless). In embodiments, the light-generating device may include a laser device, such as a laser diode. In embodiments, the light-generating device may include a superluminescent diode. Therefore, in certain embodiments, the light source may be selected from the group consisting of laser diodes and superluminescent diodes. In other embodiments, the light source may include an LED.

[0053] The phrases “different light sources” or “multiple different light sources” and similar phrases in the embodiments may refer to multiple solid-state light sources selected from at least two different boxes. Similarly, the phrases “identical light sources” or “multiple identical light sources” and similar phrases in the embodiments may refer to multiple solid-state light sources selected from the same box.

[0054] The terms “solid-state light source” or “solid-state material light source” and similar terms (like “light source”) may specifically refer to semiconductor light sources, such as light-emitting diodes (LEDs), laser diodes, or superluminescent diodes.

[0055] Therefore, the solid-state light source and light-emitting device described herein can provide primary radiation (emitted by the solid-state light source), and a portion of the primary radiation can be converted into secondary radiation (i.e., including light from the luminescent material). The secondary radiation can be based on the conversion performed by the luminescent material. Therefore, secondary radiation can also be represented as luminescent material radiation (or luminescent material light). In embodiments, the luminescent material can form a luminescent material layer or a dome comprising the luminescent material. Embodiments of this combination can be represented as phosphor-converted LEDs or PC LEDs (phosphor-converted LEDs). In other embodiments, the luminescent material can be disposed at a distance (“far”) from the light source, such as in an LED having a luminescent material layer that is not in physical contact with the LED die.

[0056] Note that a light-generating system can be part of or applied to, for example, any of the following: office lighting systems, home application systems, shop lighting systems, residential lighting systems, accent lighting systems, spotlighting systems, theater lighting systems, fiber optic application systems, projection systems, self-illuminating display systems, pixelated display systems, segmented display systems, warning sign systems, medical lighting application systems, directional sign 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. A light-generating system (or luminaire) can be part of, for example, an optical communication system or a disinfection system, or can be applied to, for example, an optical communication system or a disinfection system.

[0057] In another aspect, the invention also provides a lamp or luminaire comprising a light-generating system as defined herein. The luminaire may further include a housing, optical elements, a light-transmitting grating, etc. The lamp or luminaire may also include a housing surrounding the light-generating system. The lamp or luminaire may include a light window or housing opening in the housing through which system light can escape from the housing. In yet another aspect, the invention also provides a projection device comprising 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 as described herein. Thus, in one aspect, the invention also provides a lighting device (or projector device, disinfection device, photochemical reactor, and optical wireless communication device) selected from the group consisting of lamps and luminaires, comprising a light-generating system as defined herein. The lighting device may include a housing or carrier configured to house or support one or more elements of the light-generating system. For example, in an embodiment, the lighting device may include a housing or carrier configured to house or support one or more of a first light source, a second light source, a first light-emitting device, and a second light-emitting device. Attached Figure Description

[0058] Embodiments of the invention will now be described by way of example only, with reference to the accompanying drawings, wherein corresponding reference numerals indicate corresponding parts, and in the drawings:

[0059] Figure 1A-Figure 1B An embodiment of the light generation system 1000 is schematically depicted; and

[0060] Figure 2 An embodiment of the lighting device is schematically depicted.

[0061] The diagram does not need to be drawn to scale. Specific Implementation

[0062] Figure 1A An embodiment of a light generating system 1000 is schematically depicted. The figure illustrates a cross-section (top) of the light generating system 1000 and an illustration (bottom) of the first light-emitting surface 15 and the second light-emitting surface 25. In this embodiment, the present invention provides a light generating system 1000 comprising a first solid-state light source 10, a first light-emitting device 2100, a second solid-state light source 20, and a second light-emitting device 2200. In the depicted embodiment, the first solid-state light source 10 and the second solid-state light source 20 are functionally coupled to the same printed circuit board 50.

[0063] The first light source 10 includes a first light-emitting surface 15 having a first surface area SA1. Specifically, the first light source 10 can be configured to generate first light source light 11, which is emitted from the first light-emitting surface 15 during operation of the first light source 10. In an embodiment, a first light-emitting device 2100 can be configured to physically contact at least a portion of the first light-emitting surface 15. Specifically, the first light-emitting device 2100 can be configured to convert at least a portion of the first light source light 11 into first light-emitting device light 2101. Note that the first light-emitting device 2100 may include a first light-emitting material 210, which is configured to convert at least a portion of the first light source light 11 into first light-emitting material light 211. Here, the first light-emitting device light 2101 includes the first light-emitting material light 211. Furthermore, the first light source light 11 may include blue light.

[0064] The second light source 20 includes a second emitting surface 25 having a second surface area SA2. Specifically, the second light source 20 can be configured to generate second light source light 21, which is emitted from the second emitting surface 25 during operation of the second light source 20. In an embodiment, the second light-emitting device 2200 can be configured to physically contact at least a portion of the second emitting surface 25. Specifically, the second light-emitting device 2200 can be configured to convert at least a portion of the second light source light 21 into second light-emitting device light 2201. Note that the second light-emitting device 2200 may include a second emitting material 220, which is configured to convert at least a portion of the second light source light 21 into second emitting material light 221. Here, the second light-emitting device light 2201 includes the second emitting material light 221. Furthermore, the second light source light 21 may include blue light.

[0065] In the depicted embodiment, the first light-emitting device 2100 is disposed on and in physical contact with the light-emitting surface 15. Similarly, the second light-emitting device 2200 is disposed on and in physical contact with the second light-emitting surface 25. Furthermore, the first light-emitting device 2100 is configured to receive light from the first light source 10, and the second light-emitting device 2200 is configured to receive light from the second light source 20.

[0066] The first luminescent material 210 may include a first manganese-based luminescent material 210a, which includes materials doped with tetravalent manganese. The second luminescent material 220 may include a second manganese-based luminescent material 220a, which comprises a luminescent material doped with tetravalent manganese. Luminescent materials of this type. In this document, M includes alkaline earth cations, M' includes basic cations, x is in the range of 0-1, A includes tetravalent cations, and X includes monovalent anions, including at least fluorine.

[0067] In the embodiments, the first light-emitting device 2100 and the second light-emitting device 2200 may differ in one or more of the following aspects: (a) doped with tetravalent manganese (a) Volume average particle size of the luminescent material; (b) Doped with tetravalent manganese The types of luminescent materials include (c) the concentration of manganese dopant and (d) the component type. Luminescent materials 210 and 220 may in particular include tetravalent manganese. In embodiments, 0.1-15% of the total molar amount of type A elements in luminescent materials 210 and 220 may consist of tetravalent manganese. Furthermore, the second manganese-based luminescent material 220a may include at least 0.2 percentage points more manganese than the first manganese-based luminescent material 210a.

[0068] In the embodiments, the component type may be selected from the group consisting of: (i) an encapsulation comprising particulate luminescent material, (ii) a layer comprising particulate luminescent material, and (iii) a ceramic body comprising luminescent material, a glass body comprising luminescent material, or a single crystal comprising luminescent material. In particular, the configuration of the luminescent material in each luminescent device may differ; for example, the luminescent material may be electrophoretically deposited as a thin, dense conformal coating or layer, distributed as a volume-uniform dome, and attached via an intermediate silicone layer.

[0069] In the depicted embodiment, the first light-emitting surface 15 has a larger area than the second light-emitting surface 25, see [reference needed]. Figure 1A (Bottom). Here, the first luminescent surface 15 and the second luminescent surface 25 have rectangular cross-sections. Specifically, the first luminescent surface 15 may have a length L1 and a width W1. Similarly, the second luminescent surface 25 may have a length L2 and a width W2. Specifically, the first luminescent surface 15 may have one or more dimensions (i.e., L1 or W1) of at least 300 μm. In an embodiment, the second luminescent surface 25 has one or more dimensions (i.e., L2 or W2) of a maximum of 100 μm. Furthermore, in an embodiment, it is possible to apply... ,special .

[0070] In some embodiments, the first light-emitting surface 15 may be an epitaxial surface of the first solid-state light source 10. Furthermore, the second light-emitting surface 25 may be an epitaxial surface of the second solid-state light source 20. Therefore, many different configurations of the light-emitting surfaces are possible in the embodiments.

[0071] It must also be noted that in some embodiments, up to 5%, such as up to 2%, and particularly up to 1%, of the light emitted from the source can escape from the sides of the source (opposite to the emitting surface). This is typically the case for smaller light sources such as microLEDs. In this case, the microLED may be domed or overmolded to (also) cover the sides of the source. Conversely, larger light sources may have negligible side emission.

[0072] In another embodiment, the light generating system may include a first light generating device 110 and a second light generating device 120. In this embodiment, the first light generating device 110 may include a first solid-state light source 10 and a first light-emitting device 2100. Similarly, in this embodiment, the second light generating device 120 may include a second solid-state light source 20 and a second light-emitting device 2200. In the depicted embodiment, the first light generating device 110 is configured to generate a first device light 111, and the second light generating device 120 is configured to generate a second device light 121. The first device light 111 may be white light. Similarly, the second device light 121 may be white light. In another embodiment, the first device light 111 and the second device light 121 may have a correlated color temperature difference of at least 500K. Therefore, in this embodiment, the light generating system 1000 may be configured to generate system light 1001, which includes (a) one or more of the first light-emitting device light 2101 and the second light-emitting device light 2201, and optionally (b) one or more of the first light source light 11 and the second light source light 21.

[0073] Furthermore, in this embodiment, the light generating system 1000 may include a control system 300. The control system 300 is configured to independently control the first light source 10 and the second light source 20. Specifically, the control system 300 may be configured to perform control based on one or more of an input signal from a user interface, sensor signals (from sensors), and a timer.

[0074] Figure 1B A cross-section of another embodiment of the light generating system 1000 is schematically depicted. For illustration purposes, several different combinations of light sources 10, 20 and light-emitting devices 2100, 2200 are depicted on the same printed circuit board (PCB) 50.

[0075] Configuration I depicts a first light source 10 functionally coupled to a PCB, wherein a first light-emitting device 2100 is disposed on at least a portion of a first light-emitting surface 15. The height or thickness of the first light-emitting device 2100 may vary in the embodiments. In the illustrated embodiment, the first light-emitting device 2100 has a height H1. Furthermore, the first light-emitting device 2100 includes a first ceramic body, a first glass body, or a first single crystal having a first manganese-based light-emitting material 210a. In the case of a monolithic ceramic light-emitting body, the ceramic body may not contain particles; however, in the case of polycrystalline ceramics, grain boundaries may be distinguished.

[0076] Construction II schematically depicts a second light source 20 functionally coupled to a PCB, wherein a second light-emitting device 2200 is disposed on at least a portion of a second light-emitting surface 25. Here, the light-emitting device may include a component-type layer comprising particulate light-emitting material. This layer refers to a deposition of powder comprising light-emitting material 220a, particularly first manganese-based light-emitting particles.

[0077] Structure III has a similar structure to Structure II. However, conversely, the second light-emitting device 2200 includes an encapsulation with particulate light-emitting material. The encapsulation may include a matrix material in which light-emitting material particles may be embedded.

[0078] Configuration IV describes a second light-emitting device 2200, which includes a second ceramic body, a second glass body, or a second single crystal that also has a second manganese-based light-emitting material 220b. Note that in some embodiments, the first light-emitting device 2100 may (also) include a second ceramic body, a second glass body, or a second single crystal. However, alternatively, the first light-emitting device 2100 may also include component types selected from the group consisting of (i) an encapsulation comprising particulate light-emitting material, and (ii) a layer comprising particulate light-emitting material.

[0079] Configuration V describes an embodiment in which a first light-emitting device 2100 is disposed on at least a portion of the first light-emitting surface 15 of the first light source 10. In this document, the first (manganese-based) light-emitting material 220a has a first volume average particle size D1. In this embodiment, the average particle size D1 may be at least 5 μm.

[0080] Construction VI schematically depicts a second light source 20 functionally coupled to a PCB, wherein a second light-emitting device 2200 is disposed on at least a portion of a second light-emitting surface 25. Here, the light-emitting device may include a component-type layer comprising a particulate light-emitting material. Furthermore, the second (manganese-based) light-emitting material 220b has a second volume average particle size D2. In embodiments, the second light-emitting device 2200 may have a relatively smaller particulate light-emitting material than the first light-emitting device 2100. Specifically, it is possible to apply... In this embodiment, the average particle size D2 can be at most 1 μm. In a specific embodiment, ,and That is, in the embodiments, the first volume average particle size D1 can be (significantly) larger than the second volume average particle size D2.

[0081] Construction VII describes a construction in which the second light-emitting device 2200 includes an encapsulation containing particulate light-emitting material. In an embodiment, the second light-emitting device 2200 may have a second layer thickness H2. In particular, it is possible to apply... or .

[0082] Figure 2 An embodiment of a luminaire 2 including the light generating system 1000 as described above is schematically depicted. Reference numeral 301 indicates a user interface that can be functionally coupled to a control system 300, which is included in or functionally coupled to the light generating system 1000. Figure 2 An embodiment of a lamp 1 including a light generating system 1000 is also schematically depicted. Reference numeral 3 indicates a projector device or projector system, which can be used for purposes such as projecting images onto a wall, and may also include the light generating system 1000. Therefore, Figure 2 An embodiment of a lighting device 1200 selected from the group consisting of a lamp 1, a luminaire 2, a projector device 3, a disinfection device, a photochemical reactor, and an optical wireless communication device is schematically depicted, comprising a light generating system 1000 as described herein. In embodiments, such a lighting device may be a lamp 1, a luminaire 2, a projector device 3, a disinfection device, or an optical wireless communication device. Lighting device light emanating from the lighting device 1200 is indicated by reference numeral 1201. Lighting device light 1201 may consist substantially of system light 1001, and therefore may be system light 1001 in certain embodiments.

[0083] The term "multiple" refers to two or more items. The terms "substantially" or "essentially," and similar terms, will be understood by those skilled in the art. The term "substantially" or "essentially" may also include embodiments having "complete," "entire," "all," etc. 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, especially 99% or higher, even more especially 99.5% or higher, including 100%. The term "comprising" also includes embodiments in which the term "comprising" means "consisting of." The term "and / or" particularly 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 items 1 and 2. The term "comprising" in one embodiment may mean "consisting of," but in another embodiment it may also mean "containing at least the defined kinds and optional one or more other kinds." The use of the verb "comprising" and its variations does not exclude the presence of elements or steps other than those stated in the claims. Unless the context clearly requires otherwise, throughout the specification and claims, the words "comprising," "including," etc., should be interpreted in an inclusive sense, not an exclusive or exhaustive sense; that is, in the sense of "including but not limited to." The article "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.

[0084] 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 sequence. 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 shown herein.

[0085] These devices, apparatuses, or systems may be described herein during operation. Those skilled in the art will understand that the invention is not limited to the method of operation, or the devices, apparatuses, or systems in operation.

[0086] 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. Any reference numerals placed between parentheses in the claims should not be construed as limiting the claims.

[0087] This invention can be implemented by hardware comprising several different elements and by a computer that is appropriately programmed. In the device, apparatus, or system claims that enumerate several means, several of these means can be implemented by the same hardware. The fact that certain measures are recited in mutually different dependent claims does not imply that combinations of these measures cannot be advantageously used. In another aspect, the invention (therefore) provides a software product that, when run on a computer, enables the implementation of one or more embodiments of the methods described herein.

[0088] 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 device, apparatus, or system.

[0089] The present invention is also applicable to devices, apparatuses, or systems that include one or more characterizing features described in the specification and / or shown in the drawings. The present invention also relates to methods or processes that include one or more characterizing features described in the specification and / or shown in the drawings.

[0090] 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 of one or more divisional applications.

Claims

1. A light generating system (1000), comprising a first solid-state light source (10), a first light-emitting device (2100), a second solid-state light source (20), and a second light-emitting device (2200), wherein: - The first solid-state light source (10) includes a first light-emitting surface (15) having a first surface area SA1; wherein the first solid-state light source (10) is configured to generate first light source light (11); - The first light-emitting device (2100) is configured to physically contact at least a portion of the first light-emitting surface (15); wherein the first light-emitting device (2100) is configured to convert at least a portion of the first light source light (11) into first light-emitting device light (2101); wherein the first light-emitting device (2100) includes a first light-emitting material (210), the first light-emitting material (210) being configured to convert at least a portion of the first light source light (11) into first light-emitting material light (211); wherein the first light-emitting device light (2101) includes the first light-emitting material light (211). - The second solid-state light source (20) includes a second light-emitting surface (25) having a second surface area SA2; wherein the second solid-state light source (20) is configured to generate second light source light (21); - The second light-emitting device (2200) is configured to physically contact at least a portion of the second light-emitting surface (25); wherein the second light-emitting device (2200) is configured to convert at least a portion of the second light source light (21) into second light-emitting device light (2201); wherein the second light-emitting device (2200) includes a second light-emitting material (220), the second light-emitting material (220) being configured to convert at least a portion of the second light source light (21) into second light-emitting material light (221); wherein the second light-emitting device light (2201) includes second light-emitting material light (221). - The first luminescent material (210) includes a first manganese-based luminescent material (210a), which comprises a material doped with tetravalent manganese. Types of luminescent materials; The second luminescent material (220) includes a second manganese-based luminescent material (220a), which comprises a material doped with tetravalent manganese. Types of luminescent materials; Where M includes alkaline earth cations, M' includes basic cations, x is in the range of 0-1, A includes tetravalent cations, and X includes monovalent anions, including at least fluorine. - The first light-emitting device (2100) and the second light-emitting device (2200) differ in one or more of the following aspects: (a) doped with tetravalent manganese (a) The volume average particle size of the luminescent material of the type; (b) doped with tetravalent manganese The manganese dopant concentration of the luminescent material of the type, and (c) the component type; and - SA1 / SA2≥4, The component type is selected from the group consisting of (i) an encapsulation comprising particulate luminescent material, (ii) a layer comprising particulate luminescent material, and (iii) a ceramic body comprising luminescent material, a glass body comprising luminescent material, or a single crystal comprising luminescent material; and the light generating system (1000) is configured to generate system light (1001), the system light (1001) comprising: (a) one or more of the first luminescent device light (2101) and the second luminescent device light (2201), and optionally (b) one or more of the first light source light (11) and the second light source light (21).

2. The light generating system (1000) according to any one of the preceding claims, wherein the first light-emitting surface (15) is the epitaxial surface of the first light source (10), and wherein the second light-emitting surface (25) is the epitaxial surface of the second light source (20).

3. The light generating system (1000) according to any one of the preceding claims, wherein the first light-emitting surface (15) has one or more dimensions of at least 300 μm, and wherein the second light-emitting surface (25) has one or more dimensions of a maximum of 100 μm, and wherein .

4. The light-generating system (1000) according to any one of the preceding claims, wherein 0.1% to 15% of the light-emitting material (210, 220) is composed of tetravalent manganese relative to the total molar amount of type A elements, wherein the second manganese-based light-emitting material (220a) comprises at least 0.2 percentage points more manganese than the first manganese-based light-emitting material (210a).

5. The light generating system (1000) according to any one of the preceding claims, wherein the component types for the two light-emitting devices (2100, 2200) are selected from the group consisting of: (i) an encapsulation comprising particulate light-emitting material, and (ii) a layer comprising particulate light-emitting material; wherein the first manganese-based light-emitting material (210a) has a first volume average particle size D1, and wherein the second manganese-based light-emitting material (220b) has a second volume average particle size D2, wherein .

6. The light generating system according to claim 5, wherein And among them .

7. The light generating system (1000) according to any one of claims 1 to 6, wherein the first light-emitting device (2100) comprises a first ceramic body or a first glass body or a first single crystal having the first manganese-based light-emitting material (210a), and wherein the second light-emitting device (2200) comprises a component type selected from the group consisting of: (i) an encapsulation comprising particulate light-emitting material, and (ii) a layer comprising particulate light-emitting material.

8. The light generating system (1000) according to any one of claims 1 to 6, wherein the second light-emitting device (2200) comprises a second ceramic body or a second glass body or a second single crystal having the second manganese-based light-emitting material (220b), and wherein the first light-emitting device (2100) comprises a component type selected from the group consisting of: (i) an encapsulation comprising particulate light-emitting material, and (ii) a layer comprising particulate light-emitting material.

9. The light generating system (1000) according to any one of the preceding claims, wherein the first light-emitting device (2100) has a first layer thickness (H1), and wherein the second light-emitting device (2200) has a second layer thickness (H2), wherein or .

10. The light generating system (1000) according to any one of the preceding claims, wherein the first light-emitting material (210) and / or the second light-emitting material (220) comprises selected from... The type of luminescent material, 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.

11. The light generating system (1000) according to any one of the preceding claims, wherein the first light source (10) and the second light source (20) are functionally coupled to the same printed circuit board (50).

12. The light generating system (1000) according to any one of the preceding claims, comprising: (i) a first light generating device (110), wherein the first light generating device (110) includes the first light source (10) and the first light emitting device (2100), and (ii) a second light generating device (120), wherein the second light generating device (120) includes the second light source (20) and the second light emitting device (2200); wherein the first light generating device (110) is configured to generate a first device light (111), wherein the first device light (111) is white light; wherein the second light generating device (120) is configured to generate a second device light (121), wherein the second device light (121) is white light; wherein the first device light (111) and the second device light (121) have a correlated color temperature difference of at least 500K.

13. The light generating system (1000) according to any one of the preceding claims, wherein the light generating system (1000) includes a control system (300), wherein the control system (300) is configured to individually control the first solid-state light source (10) and the second solid-state light source (20); wherein the control system (300) is configured to control according to one or more of an input signal from a user interface, a sensor signal (of a sensor), and a timer.

14. A lighting device (1200) selected from the group consisting of lamps (1) and luminaires (2), the lighting device (1200) comprising a light generating system (1000) according to any one of the preceding claims.

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