Laser-phosphor white light source comprising diffuse blue laser, green filtered LUAG light, red filtered YAG light and CTT control method

Abstract

The present invention provides a light generating system (1000), comprising: a light generating device (100), a first light-emitting material (210), a second light-emitting material (220), a dichroic mirror (400), a beam combiner (500), and a diffuser (710), wherein: (A) the diffuser (710) is configured to have a light receiving relationship with the first light generating device (110), and is configured to diffuse the first device light (111) received by the diffuser (710) into diffused first device light (711); (C) the first light-emitting material... Material (210) is configured to be in a light-receiving relationship with a second light-generating device (120) and is configured to convert the light from the second device (121) into light from the first emitting material (211); (D) The second emitting material (220) is configured to be in a light-receiving relationship with a third light-generating device (130) and is configured to convert the light from the third device (131) into light from the second emitting material (221); (E) The dichroic mirror (400) includes: (a) a first dichroic beam splitter (410) having a first cutoff wavelength (λ). C1 ), is configured to have a light-receiving relationship with the first light-emitting material (210), and is configured such that: (i) the wavelength of light transmitted or reflected by the first light-emitting material is selected from <λ C1 The first part of the range (211a), and (ii) the wavelength of the light reflected or transmitted by the first luminescent material is selected from >λ. C1 The second part of the range (211b); and (b) the second dichroic beam splitter (420) having a second cutoff wavelength (λ). C2 ), where λ C1 ≠λ C2 It is configured to have a light-receiving relationship with the second light-emitting material (220), and is configured to (i) transmit or reflect light from the second light-emitting material at wavelengths selected from <λ. C2 The first part of the range (221a), and (ii) the wavelength of the light reflected or transmitted by the second luminescent material is selected from >λ. C2 The second portion (221b) of the range; wherein the second dichroic beam splitter (420) is configured to provide a first portion of the second luminescent material light (221b) back to the second luminescent material (220); (F) the beam combiner (500) is configured to combine the diffused first device light (711), the first portion (211a) of the first luminescent material light and the second portion (221a) of the second luminescent material light received by the beam combiner (500) into a system light (1001) beam, wherein the system light (1001) is white light with a correlated color temperature in the range of 2000-9000K and a CRI of at least 70.

Description

Technical Field

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

[0002] White light sources from laser phosphors are known in the art. For example, US2019235369A1 describes a system for solid-state lighting in which light from at least two auxiliary light sources is added to a phosphor-converted beam. Different amounts of auxiliary light can be added at different times. This can enhance the overall brightness and / or color performance of the system. Summary of the Invention

[0003] High-brightness light sources have applications in a variety of fields, including spotlights, stage lighting, headlights, home and office lighting, and automotive lighting. For this purpose, laser-phosphor technology can be employed, where a laser provides the light beam, and a remote phosphor converts the laser beam into converted light. A relatively simple method for generating white light using a laser is to combine a (blue) laser with a (yellow) phosphor to produce phosphor-converted light. Laser-phosphor systems can allow the generation of high-brightness light. Typically, the maximum brightness of a laser-phosphor light engine is limited by the components used; due to the large number of components, the engine is bulky, and the system cost is high due to the numerous specialized parts. In particular, the performance of this technology can be limited because the phosphor needs to be quenched to obtain high-quality light and provide control over the correlated color temperature (CCT). Therefore, it is desirable to improve the performance of laser-phosphor lighting fixtures.

[0004] Therefore, one aspect of the present invention is to provide an alternative light-generating system that preferably also at least partially avoids one or more of the aforementioned disadvantages. The object of the present invention may be to overcome or improve at least one disadvantage of the prior art, or to provide a useful alternative.

[0005] According to a first aspect of the present invention, a light generation system configured to provide system light is provided. In embodiments, the light generation system may include light generating devices, a first light-emitting material, a second light-emitting material, a dichroic mirror, a beam combiner, and a diffuser. In embodiments, each light generating device may include a solid-state light source. In particular, the solid-state light source may be selected from the group comprising light-emitting diodes (such as, for example, multi-junction stacked LEDs), laser diodes, and superluminescent diodes. In embodiments, the light generating device may include a first light generating device configured to generate first device light. Additionally, in embodiments, the light generating device may include a second light generating device configured to generate second device light.

[0006] Furthermore, in embodiments, the light generating device may include a third light generating device configured to generate a third device light. In particular, in embodiments, the centroid wavelengths of the first, second, and third device lights may each be selected from a wavelength range of 440-490 nm. Furthermore, in embodiments, a diffuser may be configured to receive light from the first light generating device. The diffuser may be configured to diffuse (or scatter) at least a portion of the first device light received by the diffuser into diffused first device light. Similarly, in embodiments, a first luminescent material may be configured to receive light from the second light generating device. The first luminescent material may be configured to convert at least a portion of the second device light received by the first luminescent material into first luminescent material light. In embodiments, the first peak emission wavelength (λ1) of the first luminescent material light may be selected from a wavelength range of 500-540 nm. Similarly, in embodiments, a second luminescent material may be configured to receive light from the third light generating device. The second luminescent material may be configured to convert at least a portion of the third device light received by the second luminescent material into second luminescent material light. In an embodiment, the light emitted by the second luminescent material may have a second peak emission wavelength (λ2) selected from the wavelength range of 540-590 nm. Furthermore, in an embodiment, the dichroic mirror may include a first dichroic beam splitter. In an embodiment, the first dichroic beam splitter may have a first cutoff wavelength (λ2). C1 Additionally, in an embodiment, the dichroic mirror may include a second dichroic beamsplitter. In an embodiment, the second dichroic beamsplitter may have a second cutoff wavelength (λ). C2 In particular, in the embodiments, the first cutoff wavelength (λ) C1 ) and second cutoff wavelength (λ) C2 ) can be different, that is Furthermore, in an embodiment, the first dichroic beam splitter can be configured to have a light-receiving relationship with the first luminescent material. In an embodiment, the first dichroic beam splitter can be configured such that: (a) the wavelength of the light transmitted through the first luminescent material is selected from <λ. C1 (a) the first part of the range (at least part); (b) the reflected wavelength is selected from >λ C1 The second portion (at least a portion) of the light from the first luminescent material. Additionally or alternatively, in embodiments, the first dichroic beam splitter may be configured to: (a) reflect the light from the first luminescent material at a wavelength selected from <λ. C1 (a) the first part (at least part) of the range; (b) the wavelength of the light transmitted through the first luminescent material is selected from >λ C1 The second portion (at least a portion) of the range. Similarly, in embodiments, the second dichroic beam splitter can be configured to be in a light-receiving relationship with the second luminescent material. In embodiments, the second dichroic beam splitter can be configured such that: (a) the wavelength of light transmitted through the second luminescent material is selected from <λ C2(a) the first part (at least part) of the range; (b) the wavelength of the light reflected by the second luminescent material is selected from >λ C2 The second portion (at least a portion) of the range. Additionally or alternatively, in embodiments, the second dichroic beam splitter may be configured to: (a) reflect light from the second luminescent material at a wavelength selected from <λ. C2 (a) the first part (at least part) of the range; (b) the wavelength of the light transmitted through the second luminescent material is selected from >λ C2 The second portion (at least a portion) of the range. Furthermore, in embodiments, the second dichroic beam splitter may be configured to provide (at least a portion) of the second portion of the light from the second luminescent material (through one or more optical elements) back to the second luminescent material. Furthermore, in embodiments, the beam combiner may be configured to be in a light-receiving relationship with the diffuser.

[0007] Additionally or alternatively, in an embodiment, the beam combiner may be configured to receive light from a first dichroic beam splitter. Additionally or alternatively, in an embodiment, the beam combiner may be configured to receive light from a second dichroic beam splitter. Therefore, in an embodiment, the beam combiner may be configured to combine diffused first device light (received by a diffuser), a first portion of first luminescent material light (received by a diffuser), and a first portion of second luminescent material light (received by a diffuser) into a system light beam. Furthermore, in an embodiment, the system light may be white light in the operating mode of the light generation system. Specifically, in an embodiment, the system light may be white light having a correlated color temperature selected in the range of 2000-9000K.

[0008] Additionally or alternatively, in embodiments, the system light may be white light with a color rendering index of at least 70. Therefore, in embodiments, the present invention provides a light generation system configured to provide system light; the light generation system includes light generating devices, a first light-emitting material, a second light-emitting material, a dichroic mirror, a beam combiner, and a diffuser, wherein: (A) each light generating device includes a solid-state light source selected from the group consisting of light-emitting diodes, laser diodes, and superluminescent diodes; wherein the light generating devices include a first light generating device configured to generate first device light, a second light generating device configured to generate second device light, and a third light generating device configured to generate third device light; wherein the centroid wavelengths of the first device light, the second device light, and the third device light are each selected from the wavelength range of 440-490 nm; (B) the diffuser is configured to be in a light-receiving relationship with the first light generating device. (C) A first light-emitting material is configured to receive second light-generating device light and is configured to convert second light-emitting material light received by the first light-emitting material into first light-emitting material light having a first peak emission wavelength (λ1), the first peak emission wavelength being selected from the wavelength range of 500-540 nm; (D) A dichroic mirror includes a first cutoff wavelength (λ2) and is configured to receive third light-emitting device light and is configured to convert third light-emitting material light received by the second light-emitting material into second light-emitting material light having a second peak emission wavelength (λ2), the second peak emission wavelength being selected from the wavelength range of 540-590 nm; C1 The first dichroic beam splitter and the second cutoff wavelength (λ) C1 The second dichroic beam splitter of ) . Where λ C1 ≠λ C2 Wherein: (a) the first dichroic beam splitter is configured to be in a light-receiving relationship with the first luminescent material, and is configured such that: (i) the wavelength of the light transmitted through the first luminescent material is selected from <λ C1 The first part of the range, and the wavelength of the light reflected by the first luminescent material is selected from >λ. C1 The second part of the range, or (ii) the wavelength of the light reflected by the first luminescent material is selected from <λ C1 The first part of the range, and the wavelength of the light transmitted through the first luminescent material is selected from >λ. C1 The second part of the range; and (b) the second dichroic beam splitter is configured to be in a light-receiving relationship with the second luminescent material, and is configured such that: (i) the transmission wavelength is selected from <λ C2 The first part (ii) of the light from the second luminescent material within the range of wavelengths selected from the range >λ. C2 The second part, or (ii) the reflected wavelength is selected from <λ C2The first portion of the light from the second luminescent material within the range, and the wavelength of the light transmitted through the second luminescent material is selected from >λ. C2 The second part of the range; wherein the second dichroic beam splitter is configured to provide a second portion of the light from the second luminescent material (through one or more optical elements) back to the second luminescent material; (E) the beam combiner is configured to be in a light-receiving relationship with the diffuser, the first dichroic beam splitter, and the second dichroic beam splitter; wherein the beam combiner is configured to combine the diffused first device light, the first portion of the light from the first luminescent material, and the first portion of the light from the second luminescent material received by the beam combiner into a system light beam; and (F) in the operating mode of the light generation system, the system light is white light, the correlated color temperature of which is selected from the range of 2000-9000K, and the CRI is at least 70.

[0009] This system provides a high-power optical engine. Furthermore, it allows for improved performance regarding thermal and optical quenching. By utilizing the different dichroic mirrors with proposed reflectance characteristics, a CRI of approximately 90 and a positive R9 value can be obtained. The R9 value particularly represents the accuracy with which the light source or light generation system can produce red light. Embodiments of the invention can achieve such values, providing a laser-phosphor high-brightness, high-quality white light source comprising diffused blue laser light, green-filtered LuAG light, red-filtered converted and re-converted YAG light, and optionally far-red-filtered re-converted phosphor light, and providing a CCT control method. In particular, for this light generation system, the user can easily adjust the color point within a predetermined range of white light output color points (e.g., 6000-10000K) based on the maximum output power of the laser source. Simultaneously, the system can relatively efficiently collect all spectral components of the output light, thereby achieving a high-efficiency, high-brightness white light engine. Furthermore, this light generation system provides an optical engine configured to effectively utilize its light source. Furthermore, the system can be easily calibrated at the factory according to the required color points.

[0010] However, this system can safely provide high-power light. The system can be relatively compact. Furthermore, the system can be equipped with thermally managed luminescent materials. In addition to high light power, the system can also provide high emissivity (or brightness), i.e., high light power density of the light source.

[0011] Therefore, a light generating system (or "system") may include a light generating device, a first light-emitting material, a second light-emitting material, a dichroic mirror, a beam combiner, and a diffuser. Specific embodiments of the different components of the light generating system will be described in more detail below.

[0012] A light generating device can be configured to generate device light. In an embodiment, the light generating device may include (at least) a first light generating device, a second light generating device, and a third light generating device. In an embodiment, the first light generating device can be configured to generate first device light.

[0013] Therefore, in embodiments, the first light generating device may include a first light source configured to generate a first light source. The first light source can be any light source in nature, as detailed below. In particular, in embodiments, the first light generating device (the first light source) may include a first solid-state light source. Therefore, in embodiments, the first light generating device may include one or more of light-emitting diodes (e.g., single-junction or multi-junction light-emitting diodes), laser diodes, and superluminescent diodes. The first light generating device may also include multiple first (solid-state) light sources herein. In particular, in specific embodiments, the first light generating device may include a first laser group comprising multiple first lasers. The laser group may include multiple laser diodes relatively densely assembled on a shared substrate equipped with collimating optics, such as collimating lenses with a lens for each laser diode. Using a laser group particularly facilitates the projection of a high-power laser beam onto a light-emitting converter without the need for a reverse beam expander. Furthermore, in embodiments, the first light generating device may particularly be configured to generate light with a first centroid wavelength (λ). D1 The first device light. Specifically, in the embodiment, the first centroid wavelength (λ) of the first device light. D1 The wavelength can be selected from the 430-490nm range, for example, from the 440-490nm range, or from the 445-475nm range. The term "centroid wavelength" (also known as λ) is used. C The term "spectral power distribution" (or "spectral energy distribution") is known in the art and refers to a wavelength value in which half of the light energy is located at a shorter wavelength and the other half at a longer wavelength; this value is measured in nanometers (nm). It is the wavelength at which the integral of the spectral power distribution is divided into two equal parts, as shown in the formula... This is represented as follows, where the summation is performed within the wavelength range of interest, and I(λ) is the spectral energy density (i.e., the integral of the product of wavelength and intensity over the emission band, normalized to the integral intensity). For example, the centroid wavelength can be determined under operating conditions. Therefore, in an embodiment, the first device light can be blue light.

[0014] Similar to the first light-generating device, the second light-generating device can be configured in embodiments to generate second device light. Therefore, in embodiments, the second light-generating device may include a second light source configured to generate second light source light. The second light source can be any light source in nature, as detailed below. Specifically, in embodiments, the second light-generating device (the second light source) may include a second solid-state light source. Therefore, in embodiments, the second light-generating device may include one or more of light-emitting diodes (e.g., single-junction or multi-junction light-emitting diodes), laser diodes, and superluminescent diodes. The second light-generating device may also include multiple second (solid-state) light sources herein. Specifically, in specific embodiments, the second light-generating device may include a second laser group having multiple second lasers. Furthermore, in embodiments, the second light-generating device may be particularly configured to generate light with a second centroid wavelength (λ). D2 The second device light. In particular, in embodiments, the second device light may have a second centroid wavelength (λ) selected from the wavelength range of 430-490 nm. D2 (e.g., selected from the 440-490nm range, or the 445-475nm range). Therefore, in an embodiment, the second device light can be blue light.

[0015] Similarly, in embodiments, the third light generating device may be configured to generate third device light. Therefore, in embodiments, the third light generating device may include a third light source configured to generate third light source light. The third light source can be any light source in nature, as detailed below. In particular, in embodiments, the third light generating device (the third light source) may include a third solid-state light source. Therefore, in embodiments, the third light generating device may include one or more of light-emitting diodes (e.g., single-junction or multi-junction light-emitting diodes), laser diodes, and superluminescent diodes. The third light generating device may also include a plurality of second (solid-state) light sources. In particular, in embodiments, the third light generating device may include a third laser group having a plurality of third lasers. Furthermore, in embodiments, the third light generating device may be particularly configured to generate light with a third centroid wavelength (λ). D3 The third device light. In particular, in the embodiment, the third centroid wavelength (λ) of the third device light. D3 The wavelength can be selected from the 430-490nm range, for example, the 440-490nm range, or for example, the 445-475nm range. Therefore, in the embodiment, the third device light can be blue light.

[0016] In an embodiment, the first centroid wavelength (λ) D1 ), second centroid wavelength (λ) D2 ) and the third centroid wavelength (λ) D3Both of them can even be essentially the same, that is, the centroid wavelengths of the first device light, the second device light, and the third device light are zero different from each other. However, in other embodiments, the first centroid wavelength (λ) D1 ), second centroid wavelength (λ) D2 ) and the third centroid wavelength (λ) D3 The two or even all of them can be different from each other. In a specific embodiment, the difference between the centroid wavelengths of the first device light, the second device light and the third device light can be less than 15 nm, for example less than 10 nm, for example less than 8 nm, and especially less than 5 nm.

[0017] In the operating mode of the light generation system, a first light generating device may be configured upstream of a diffuser. Particularly in embodiments, the first light generating device may be configured to provide first device light to the diffuser. Therefore, in these embodiments, the diffuser may be configured to be in a light-receiving relationship with the first light generating device. In embodiments, the diffuser may be configured to diffuse (or scatter) the light received by the diffuser. The phrase “...light received by…” and similar phrases, such as “device light received by the diffuser,” specifically indicate that some action may occur when an object actually receives the light. This action in embodiments may be one or more of diffusion, conversion, reflection, and transmission. Furthermore, the action may also include refraction. Furthermore, the phrase “...and…are configured in a light-receiving relationship” and similar phrases, such as “element A may be configured in a light-receiving relationship with element B,” may specifically indicate that light from element B can propagate directly or indirectly (e.g., through one or more optical elements) to (particularly) element A (received).

[0018] In particular, in embodiments, the diffuser may be configured to diffuse (at least partially) the first device light received by the diffuser into diffuse first device light. In embodiments, the diffuser may be configured to diffuse at least 60%, for example at least 70%, for example at least 80%, especially at least 90%, more specifically at least 95% (including 100%) of the first device light into diffuse first device light. Furthermore, in embodiments, the diffuser may be configured to diffuse at most 100%, for example at most 99%, for example at most 98%, especially at most 95%, more specifically at most 90% of the first device light into diffuse first device light. The diffuser may be configured in a transmission mode and / or a reflection mode, as detailed below.

[0019] The terms “upstream” and “downstream” refer to the arrangement of an object or feature relative to the direction of propagation of light from a light-generating device (here referring to a light source). The second position in the beam closer to the light-generating device is “upstream” relative to a first position in the beam from the light-generating device, and the third position in the beam farther from the light-generating device is “downstream”.

[0020] Similar to the above, in the operating mode of the light generation system, a second light generating device may be disposed upstream of the first light-emitting material. Specifically, in embodiments, the second light generating device may be configured to provide second device light to the first light-emitting material. Therefore, in these embodiments, the first light-emitting material may be configured to have a light-receiving relationship with the second light generating device. In embodiments, the first light-emitting material may be configured to convert the light received by the first light-emitting material. In particular, in embodiments, the first light-emitting material may be configured to convert (at least partially) the second device light received by the first light-emitting material into first light-emitting material light. In embodiments, the first light-emitting material may be configured to convert at least 60%, such as at least 70%, for example at least 80%, especially at least 90%, more specifically at least 95%, including 100%, of the second device light received by the first light-emitting material into first light-emitting material light. Furthermore, in embodiments, the first light-emitting material may be configured to convert up to 100%, for example up to 99%, for example up to 98%, especially up to 95%, more specifically up to 90%, of the second device light received by the first light-emitting material into first light-emitting material light. The luminescent materials and embodiments thereof will be discussed in more detail below (see below).

[0021] The first luminescent material can be configured in a transmission mode and / or a reflection mode. In particular, the luminescent material can be configured in a transmission mode. In an embodiment, when the element is configured in a transmission mode (or "configured to transmit"), this can mean that the element can transmit at least 85%, for example at least 90%, for example at least 95%, and especially at least 98% (including 100%) of the light received (and optionally converted) by the element. In the transmission mode, mixing the light from the source source with the light from the luminescent material is relatively easy, which may help to produce a desired spectral power distribution. In the reflection mode, heat dissipation management may be easier because most of the luminescent material can be in thermal contact with a thermally conductive element (e.g., a heat sink or a thermal diffuser). In an embodiment, when the element is configured in a reflection mode (or "configured to reflect"), this can mean that the element can reflect at least 85%, for example at least 90%, for example at least 95%, and especially at least 98% (including 100%) of the light received (and optionally converted) by the element.

[0022] In an embodiment, the light emitted by the first luminescent material may have a first peak emission wavelength (λ1). Hereinafter, the term "peak emission wavelength" refers to the wavelength at which the emission spectrum of the corresponding element reaches its maximum value. Therefore, the first peak emission wavelength (λ1) refers to the wavelength at which the emission spectrum of the first luminescent material reaches its maximum value (i.e., peak). The first peak emission wavelength (λ1) can be selected, in particular, from a wavelength range of 490-560 nm, for example, from a wavelength range of 500-540 nm, such as from a wavelength range of 510-530 nm. Thus, in an embodiment, the first luminescent material can be configured to convert blue second device light into greenish-yellow first luminescent material light.

[0023] As described above, in one embodiment, the first light generating device may be configured to provide first device light to a diffuser, and the second light generating device may be configured to provide second device light to a first light-emitting material. However, in other embodiments, the first light generating device and the second light generating device may be essentially the same light generating device. Therefore, in these embodiments, only one light generating device may be configured (optionally via one or more optical devices) to provide device light to the diffuser and the first light-emitting material; that is, the diffuser and the first light-emitting material may be configured to have a light-receiving relationship with the essentially same light generating device.

[0024] Similarly, in the operating mode of the light generation system, a third light generating device may be disposed upstream of the second light-emitting material. Particularly in embodiments, the third light generating device may be configured to provide third device light to the second light-emitting material. Therefore, in these embodiments, the second light-emitting material may be configured to have a light-receiving relationship with the third light generating device. In embodiments, the second light-emitting material may be configured to convert the light received by the second light-emitting material. In particular, in embodiments, the second light-emitting material may be configured to convert (at least partially) the third device light it receives into second light-emitting material light. In embodiments, the second light-emitting material may be configured to convert at least 60%, for example at least 70%, for example at least 80%, especially at least 90%, and more specifically at least 95% (including 100%) of the third device light it receives into second light-emitting material light. Furthermore, in embodiments, the second light-emitting material may be configured to convert up to 100%, for example up to 99%, for example up to 98%, especially up to 95%, and more specifically up to 90% of the third device light it receives into second light-emitting material light. The second light-emitting material may be configured to be in a transmission mode and / or a reflection mode.

[0025] In an embodiment, the light emitted by the second luminescent material may have a second peak emission wavelength (λ2). The second peak emission wavelength (λ2) may be selected, in particular, from the wavelength range of 540-620 nm, for example, from the wavelength range of 540-590 nm, or from the wavelength range of 550-580 nm. Therefore, in an embodiment, the second luminescent material may be configured to convert the blue light from the third device into a yellowish-red light emitted by the second luminescent material.

[0026] Therefore, in an embodiment, the third light-generating device may be configured to provide third device light to the second light-emitting material. However, in an embodiment, two or more of the first, second, and third light-generating devices may be substantially the same light-generating device. Therefore, in an embodiment, one light-generating device may be configured (optionally via one or more optical elements) to provide device light to both (or all) of the diffuser, the first light-emitting material, and the second light-emitting material; that is, both (or all) of the diffuser, the first light-emitting material, and the third light-emitting material may be in a light-receiving relationship with substantially the same light-generating device.

[0027] As described above, the light generation system further includes a dichroic mirror. In an embodiment, the dichroic mirror may include a first dichroic beamsplitter and a second dichroic beamsplitter. In an embodiment, the first dichroic beamsplitter may have a first cutoff wavelength (λ). C1 Therefore, in an embodiment, the first dichroic beam splitter may be configured such that: (i) the reflected or transmitted wavelength is less than (or optionally equal to) the first cutoff wavelength (λ). C1 (ii) light whose transmitted or reflected wavelength is greater than (or optionally equal to) the first cutoff wavelength (λ). C1 The light. In a specific embodiment, the first cutoff wavelength (λ) is the light. C1 The wavelength range can be selected from 555-585nm, for example, the wavelength range of 560-580nm, or the wavelength range of 560-570nm.

[0028] In an embodiment, the first dichroic beamsplitter may also be disposed downstream of the first luminescent material. Therefore, in the operating mode of the light generation system, the first dichroic beamsplitter may be in a light-receiving relationship with the first luminescent material. The first dichroic beamsplitter may be specifically configured to transmit (at least a portion) of the first luminescent material light received by the first dichroic beamsplitter and reflect (at least another portion) of the first luminescent material light received by the first dichroic beamsplitter. In an embodiment, the first luminescent material light received by the first dichroic beamsplitter may include a first portion and a second portion. In an embodiment, the wavelength of the first portion of the first luminescent material light received by the first dichroic beamsplitter may be less than (or optionally equal to) a first cutoff wavelength, i.e., <λ. C1In a specific embodiment, the first portion of the light from the first luminescent material may include light that is primarily green. In another embodiment, the wavelength of the second portion of the light from the first luminescent material received by the first dichroic beamsplitter may be greater than (or optionally equal to) the first cutoff wavelength, i.e., >λ. C1 In a specific embodiment, the first portion of the light from the first luminescent material may include predominantly yellow light. In an embodiment, the first dichroic beamsplitter may be configured such that: (i) the wavelength of the light transmitted (received by the first dichroic beamsplitter) from the first luminescent material is selected from <λ. C1 The first portion (at least a portion) of the range, and (ii) the wavelength of the light reflected (received by the first dichroic beam splitter) from the first luminescent material is selected from >λ. C1 The second part (at least partially) of the range. Alternatively, in an embodiment, the first dichroic beam splitter may be configured to: (i) reflect (received by the first dichroic beam splitter) light from the first luminescent material at a wavelength selected from <λ. C1 The first portion (at least a portion) of the range, and (ii) the wavelength of the light transmitted (received by the first dichroic beam splitter) from the first luminescent material is selected from >λ. C1 The second part (at least a portion) of the range. For example, in an embodiment, the first cutoff wavelength (λ) C1 The wavelength can be 564 nm. Therefore, in these embodiments, the first dichroic beam splitter can be configured to: (i) transmit (or reflect) first luminescent material light (received by the first dichroic beam splitter) with a wavelength selected from the <564 nm wavelength range; and (ii) reflect (or transmit) first luminescent material light (received by the first dichroic beam splitter) with a wavelength selected from the >564 nm wavelength range.

[0029] The first dichroic beamsplitter can be configured such that light reflected by the first dichroic beamsplitter will not be reflected back to the first luminescent material. However, in other embodiments, the first dichroic beamsplitter can also be configured such that light reflected by the first dichroic beamsplitter will be reflected back to the first luminescent material. See below for information on the second (and third) dichroic beamsplitters.

[0030] Similar to the first dichroic beam splitter, in this embodiment, the second dichroic beam splitter may have a second cutoff wavelength (λ). C2 Therefore, in an embodiment, the second dichroic beam splitter can be configured such that: (i) the reflected or transmitted wavelength is less than (or optionally equal to) the second cutoff wavelength (λ). C2 (ii) light whose transmitted or reflected wavelength is greater than (or optionally equal to) the second cutoff wavelength (λ). C2 The light. In an embodiment, the second cutoff wavelength (λ) is the light. C2 In particular, it can be used with the first cutoff wavelength (λ) C1 ) are different, that is, λ C1≠λ C2 However, this is not always the case; in some alternative embodiments, the second cutoff wavelength (λ) C2 It can be compared with the first cutoff wavelength (λ). C1 Essentially the same. In a specific embodiment, the second cutoff wavelength (λ) C2 It can be selected from the wavelength range of 560-590nm, for example from the wavelength range of 565-585nm, or for example from the wavelength range of 575-585nm.

[0031] In an embodiment, the second dichroic beamsplitter may also be configured downstream of the second luminescent material. Therefore, in the operating mode of the light generation system, the second dichroic beamsplitter can be configured to receive light from the second luminescent material. Specifically, the second dichroic beamsplitter can be configured to transmit at least a portion of the received light from the second luminescent material and reflect at least another portion of the received light from the second luminescent material. In an embodiment, the luminescent material light received by the second dichroic beamsplitter may include a first portion and a second portion. In an embodiment, the first portion of the second luminescent material light received by the second dichroic beamsplitter may have a wavelength less than (or optionally equal to) the second cutoff wavelength, i.e., <λ. C2 In a specific embodiment, the first portion of the light from the first luminescent material may include substantially red light. In an embodiment, the second portion of the light from the second luminescent material received by the second dichroic beam splitter may have a wavelength greater than (or optionally equal to) the second cutoff wavelength, i.e., >λ. C2 In a specific embodiment, the first portion of the light from the first luminescent material may include substantially yellow light. In an embodiment, the second dichroic beamsplitter can therefore be configured such that: (i) the wavelength of the light transmitted (received by the second dichroic beamsplitter) from the second luminescent material is selected from <λ. C2 The first part (at least partially) of the range; and (ii) the wavelength of the light reflected (received by the second dichroic beam splitter) from the second luminescent material is selected from >λ. C2 The second part (at least part) of the scope.

[0032] Alternatively, in an embodiment, the second dichroic beamsplitter can therefore be configured to: (i) reflect (the light received by the second dichroic beamsplitter) light from the second luminescent material at wavelengths selected from <λ. C2 (i) the first part (at least part) of the range; (ii) the wavelength of the light transmitted (received by the second dichroic beam splitter) from the second luminescent material is selected from >λ. C2 The second portion (at least partially) of the range. For example, in an embodiment, the second cutoff wavelength (λ) C2The wavelength can be 580 nm. Therefore, in such an embodiment, the second dichroic beam splitter can be configured to: (i) transmit (or reflect) light from the second emitting material with wavelengths selected from the <580 nm wavelength range (received by the second dichroic beam splitter), and (ii) reflect (or transmit) light from the second emitting material with wavelengths selected from the >580 nm wavelength range (received by the second dichroic beam splitter).

[0033] In an embodiment, the second dichroic beamsplitter can be configured such that light reflected from it is reflected back to the second luminescent material. It is advantageous to configure the second dichroic beamsplitter such that light reflected from it is reflected back to the second luminescent material because the light can be reconverted to increase the amount of second luminescent material light in the output system light (relative to the second cutoff wavelength (λ)). C2 The second dichroic beam splitter has a desired wavelength. Therefore, in embodiments, the second dichroic beam splitter can be configured to return (at least a portion) of the second luminescent material light (through one or more optical elements) to the second luminescent material. Thus, the second portion of the second luminescent material light is prevented from propagating through the system and interfering with or escaping the light generation system, thereby improving the safe operation of the light generation system. In these embodiments, the second luminescent material can be configured to reconvert (at least a portion) of the second portion of the second luminescent material light received therefrom (thereby potentially increasing the first portion of the second luminescent material light). In a specific embodiment, the second dichroic beam splitter can be configured to reflect the second portion (especially the yellow portion) of the second luminescent material light back to the second luminescent material, such that at least a portion of the reflected second (yellow) portion of the light can be reconverted by the second luminescent material into the first (red) portion of the second luminescent material light.

[0034] Therefore, in embodiments, the light generation system can be configured in operating mode to generate one or more of the following: (blue) diffused first device light, (green) first luminescent material light, and (red) second luminescent material light. Different types of light can be combined into a beam of system light. Therefore, in embodiments, the light generation system may include a beam combiner. In embodiments, in operating mode of the light generation system, the beam combiner can be configured downstream of the diffuser, the first dichroic beam splitter, and the second dichroic beam splitter. Therefore, in embodiments, the beam combiner can be configured to have a light receiving relationship with one or more, especially all, of the diffuser, the first dichroic beam splitter, and the second dichroic beam splitter. The beam combiner can be configured in particular to combine (at least) the diffused first device light received by the beam combiner, a first portion of the first luminescent material light received by the beam combiner, and a second portion of the second luminescent material light received by the beam combiner into a system beam.

[0035] Therefore, in the operating mode of the light generating system, the system light can be white light. Particularly in embodiments, the system light can be white light with a CCT selected from the range of 1000-12000K, such as those selected from the range of 2000-9000K, such as those selected from the range of 2500-8000K, and especially those selected from the range of 6500-8000K. The term "white light" and similar terms are well known to those skilled in the art. It is particularly suitable for light with a correlated color temperature (CCT) between about 1800K and 20000K, for example, 2000K to 20000K, especially 2700K to 20000K. For general illumination, the CCT is particularly in the range of 2000K to 7000K, for example, in the range of 2700K to 6500K. In embodiments, for example for backlighting or other purposes, the correlated color temperature (CCT) can be particularly in the range of about 7000K to 20000K. Furthermore, in embodiments, the correlated color temperature (CCT) is particularly within approximately 15 SDCM (standard deviation of color matching) from the blackbody locus (BBL), particularly within approximately 10 SDCM from the blackbody locus, and even more particularly within approximately 5 SDCM from the blackbody locus. In specific embodiments, the correlated color temperature (CCT) can be selected from the range of 6000-12000K, for example selected from the range of 7000-12000K, for example at least 8000K. Additionally or alternatively, in embodiments, the system light can be white light with a color rendering index (CRI) of at least 65, for example at least 70, for example at least 80, and particularly at least 85. In particular, in embodiments, the correlated color temperature (CCT) is selected from the range of 6000-12000K, for example selected from the range of 7000-12000K, combined with a color rendering index (CRI) of at least 70.

[0036] In embodiments, the light source can also provide light with a correlated color temperature (CCT) between approximately 5000 and 20000 K, for example, a direct phosphor-converted LED (e.g., a blue light-emitting diode with a thin phosphor layer for achieving, for example, 10000 K). Therefore, in specific embodiments, the light source is configured to provide light with a correlated color temperature in the range of 5000 K to 20000 K, and even more particularly in the range of 6000 to 20000 K, such as 8000 to 20000 K. One advantage of a relatively high color temperature is that the light source can contain a relatively high blue component.

[0037] As described above, the light-generating system may include a first luminescent material and a second luminescent material (and optionally a third luminescent material, detailed below). The luminescent material is configured to convert at least a portion of the first radiation (selected from one or more of UV radiation and / or visible radiation) into luminescent material light. In particular, in embodiments, the luminescent material may be configured to convert at least a portion of blue light (as radiation) into luminescent material light. Especially when the blue light is partially converted, it can be used as a blue light source (for device emission) and as excitation light that can be converted by the luminescent material. The first radiation may in particular be provided by a (solid-state) light source.

[0038] When different luminescent materials are applied, one or more luminescent materials can be configured to convert incident light into one or more of green and yellow luminescent material light, and one or more other luminescent materials can be configured to convert incident light into one or more of orange and red luminescent material light.

[0039] The term "luminescent material" specifically refers to a material capable of converting a first radiation (especially one or more of UV radiation and / or blue radiation) into a second radiation. Typically, the first and second radiations have different spectral power distributions. Therefore, in addition to the term "luminescent material," the terms "luminescent converter" or "converter" may also be used. Furthermore, in addition to the term "luminescent material," the term "phosphor" may also be used. These terms are known to those skilled in the art. Typically, the second radiation has a spectral power distribution at a longer wavelength than the first radiation, which is a so-called down-conversion. However, in specific embodiments, the second radiation has a spectral power distribution at a shorter wavelength than the first radiation, which is a so-called up-conversion.

[0040] In embodiments, "luminescent material" can specifically refer to a material capable of converting radiation into visible light and / or infrared light. For example, in embodiments, the luminescent material is capable of converting one or more types of ultraviolet and / or blue light into visible light. In specific 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 is a down-converter, i.e., shorter wavelength radiation is converted into longer wavelength radiation (λ). ex <λ em Although in specific embodiments, the luminescent material may include an up-converter luminescent material, i.e., radiation with a longer wavelength is converted into radiation with a shorter wavelength (λ). ex >λ em ).

[0041] In embodiments, the term "luminescence" may refer to phosphorescence. In embodiments, the term "luminescence" may also refer to fluorescence. In addition to the term "luminescence," the term "emission" may also be used. Therefore, the terms "first radiation" and "second radiation" may refer to excitation radiation and emission (radiation), respectively. Similarly, in embodiments, the term "luminescent material" may refer to phosphorescence and / or fluorescence. The term "luminescent material" may also refer to a variety of different luminescent materials. Some examples of possible luminescent materials are listed below. Therefore, in specific embodiments, the term "luminescent material" may also refer to a luminescent material composition. The term "luminescent material" as used herein may also refer to a material comprising a luminescent material, such as a light-transmitting matrix comprising a luminescent material.

[0042] In the embodiments, the luminescent material is selected from garnet and nitride, particularly garnet and nitride doped with trivalent cerium or divalent europium, respectively. The term "nitride" may also refer to oxynitride or nitrogen silicate, etc. Alternatively or additionally, the luminescent material may also be selected from silicates, particularly silicates doped with divalent europium.

[0043] In particular, the luminescent material is configured to convert at least a portion of the light source light into luminescent material light, wherein the luminescent material may include A3B5O. 12 Ce-type (garnet) luminescent materials, 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. Therefore, the light emitted by this luminescent material can be, for example, green or yellow (or even orange in certain embodiments (depending on the composition of the garnet and the concentration of cerium)). However, other embodiments are also possible, as detailed below. In embodiments, 0.05-10%, and more particularly 0.05-5%, for example 0.1-5%, of element A includes Ce. Specifically, in embodiments, 0.1-3%, for example up to 2%, of element A, selected from the range of 0.1-1.5%, for example, includes Ce at least above 0.5%.

[0044] In particular, the luminescent material includes or is itself a conversion material. This luminescent material may include organic groups, molecules, or inorganic groups that convert light. These groups (or molecules) may be referred to as converter elements. Garnet-type materials as described above include cerium (Ce) as a converter element. Cerium-containing garnets are well known in the art.

[0045] Therefore, in a specific embodiment, the luminescent material includes A3B5O. 12Ce-type luminescent materials, wherein A in embodiments comprises one or more of Y, La, Gd, Tb, and Lu, particularly (at least) one or more of Y, Gd, Tb, and Lu, and B in embodiments comprises one or more of Al, Ga, In, and Sc. Specifically, A may comprise one or more of Y, Gd, and Lu, for example, particularly one or more of Y and Lu. Specifically, B may comprise one or more of Al and Ga, more specifically, at least Al, for example, almost entirely Al. Therefore, cerium-containing garnet materials are particularly suitable luminescent materials. Examples of garnet particularly include A3B5O. 12 Garnet, wherein A comprises at least yttrium or lutetium, and wherein B comprises at least aluminum. Such garnets may be doped with cerium (Ce), praseodymium (Pr), or a combination of cerium and praseodymium; particularly, cerium may be present. B may particularly comprise aluminum (Al); however, in addition to aluminum, B may also partially comprise gallium (Ga) and / or scandium (Sc) and / or indium (In), particularly comprising up to about 20% Al, more specifically up to about 10% Al (i.e., the B ions consist primarily of 90% or more mol% aluminum and 10% or less mol% of one or more of gallium, scandium, and indium); B may particularly comprise up to about 10% gallium. In another variant, B and O may be at least partially substituted with Si and N. Element A may particularly be selected from the group consisting of yttrium (Y), gadolinium (Gd), terbium (Tb), and lutetium (Lu). Furthermore, the content of Gd and / or Tb is typically only about 20% of A. In a specific embodiment, the garnet luminescent material includes , where x is greater than or equal to 0 and less than or equal to 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, some Y and / or Lu are substituted by Ce. This is known to those skilled in the art. Ce typically substitutes for no more than 10% of A; generally, the concentration of Ce (relative to A) will be in the range of 0.1% to 4%, particularly in the range of 0.1% to 2%. Assuming a Ce content of 1% and a Y content of 10%, the complete chemical formula is: As those skilled in the art know, Ce in garnet is essentially or only in the trivalent state. In the embodiments, the luminescent material (therefore) comprises A3B5O. 12 In a specific embodiment, up to 10% of the BO can be replaced by Si-N.

[0046] In a specific embodiment, the luminescent material includes wherein x1+x2+x3=1, wherein x3>0, wherein 0<x2+x3≤0.2, wherein y1+y2=1, wherein in particular 0≤y2≤0.2, wherein A' comprises one or more elements selected from the group consisting of lanthanides, and wherein B' comprises one or more elements selected from the group consisting of Ga, In and Sc. In embodiments, x3 is selected from the range of 0.001-0.1.

[0047] In specific embodiments, up to 10% of B-O may be replaced by Si-N. Here, B in B-O refers to one or more of Al, Ga, In and Sc (and O refers to oxygen); in specific embodiments, B-O may refer to A1-O. As mentioned above, in specific embodiments, x3 may optionally be selected from the range of 0.001-0.04. In particular, such a luminescent material may have a suitable spectral distribution (see however below), have a relatively high efficiency, have a relatively high thermal stability, and allow a high CRI (optionally in combination with light from other light sources as described herein). Therefore, in specific embodiments, A may be selected from the group consisting of Lu and Gd. Alternatively or additionally, B may comprise Ga. Therefore, in embodiments, the luminescent material comprises wherein Lu and / or Gd are available. Even more particularly, x3 is selected from the range of 0.001-0.1, wherein 0<x2+x3≤0.1, and wherein Furthermore, in specific embodiments, up to 1% of B-O may be replaced by Si-N. Herein, the percentage refers to the number of moles (as known in the art); see also, for example, EP3149108. In yet another specific embodiment, the luminescent material comprises wherein x1+x3=1, and wherein 0<x3≤0.2, such as 0.001-0.1.

[0048] Alternatively or additionally, the luminescent material may comprise type luminescent material, wherein A comprises one or more of Y, La, Gd, Tb and Lu, for example in embodiments, A comprises one or more of La and Y.

[0049] In specific embodiments, the luminescent material may comprise at least two different luminescent materials, which two luminescent materials are configured to provide luminescent material light having different spectral power distributions. As mentioned above, the term "different luminescent materials" may refer to different luminescent materials, or may refer to two compositions, each of which comprises at least one common luminescent material, but has a different composition. For example, a primary luminescent material comprises luminescent materials A and B, and a secondary luminescent material comprises only A or only B, or comprises both A and B but in a different weight ratio. Such primary luminescent material and secondary luminescent material may have different spectral power distributions of their respective luminescent material light.

[0050] Garnet-type luminescent materials can also be produced using another chemical formula. To describe. Where A may include one or more of the following: (i) rare earth ions, such as those selected from Y 3+ Lu 3+ Gd 3+ 、Tb 3+ and La 3+ (ii) one or more of the following; (ii) divalent cations, such as Ca 2+ Here, B may include one or more of the following: (i) trivalent cations, such as Al 3 + Ga 3+ ,Sc 3+ Sb 3+ and In 3+ (i) one or more of the following; (ii) divalent cations, such as Mg 2+ and Mn 2+ One or more of the following. Here, C may include one or more of the following: (i) trivalent cations, such as one or more of Ga3+ and Al3+; (ii) divalent cations, such as Mn 2+ (iii) Tetravalent cations, such as Si 4+ and Ge 4+ One or more of these components can maintain the crystal structure of garnet. In addition to the above, other substitutions may also exist.

[0051] As is known to those skilled in the art, the Eu in the luminescent materials described above (and below) exists essentially or only in a divalent state.

[0052] The term "luminescent material" in this document specifically refers to inorganic luminescent materials. Alternatively or additionally, other luminescent materials may also be used. For example, quantum dots and / or organic dyes may be used and selectively embedded in a transmission matrix, such as polymers (e.g., PMMA or polysiloxanes). Different luminescent materials may have different spectral power distributions of the corresponding luminescent material light. Alternatively or additionally, these different luminescent materials may have different color points (or dominant wavelengths).

[0053] In embodiments, the first luminescent material may in particular include A3B5O. 12 Ce-type luminescent materials, more specifically, may include The second luminescent material is of the same type. Conversely, in embodiments, the second luminescent material may particularly include A3B5O. 12 Ce-type luminescent materials, more specifically, may include The luminescent material is of this type. In these embodiments, A' comprises one or more of La, Gd, and Tb, and B comprises one or more of Al, Ga, In, and Sc. Furthermore, in the embodiments, for materials comprising... The first luminescent material, which can be applied Additionally, in the embodiments, for those including The first luminescent material, which can be applied Additionally, in the embodiments, for those including The first luminescent material, which can be applied and Conversely, in the embodiments, for those including The second luminescent material can be applied to Additionally, in the embodiments, for those including The second luminescent material can be applied to Additionally, in the embodiments, for those including The second luminescent material can be applied to and .

[0054] Furthermore, in the embodiments, according to MoE, the first luminescent material may include a higher Lu than the second luminescent material, i.e. Specifically, in the embodiments, ,For example Especially Furthermore, in the embodiments, according to a molar ratio, the second luminescent material may include a higher gamma than the first luminescent material, i.e. In particular, In the embodiment, x 22 It can be equal to 0. Furthermore, in the embodiments, x... 11 It can be equal to 0. Furthermore, in the embodiments, x... 12 x 13 x 22 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 be selected from the range of 0.001 to 0.1. Therefore, in a specific embodiment, the first luminescent material may include a material of type [missing information]. The luminescent material, the second luminescent material may include the type of The luminescent material, wherein A' comprises one or more of La, Gd, and Tb, and wherein B comprises one or more of Al, Ga, In, and Sc; wherein (a) x 11 + x 12 >0; and (b) and And (c) and And composed of luminescent materials of substantially the same (or similar) type (e.g., both are...). Or both Compared to the spectral power distributions of the first and second luminescent materials, this composition of the first and second luminescent materials can provide a wider spectral power distribution of the luminescent material light in the system light. For example, in an embodiment, the first luminescent material can be configured to provide first luminescent material light, and the second luminescent material can be configured to provide second luminescent material light, wherein the overlap between the spectral power distribution (wavelength range) of the first luminescent material light and the spectral power distribution (wavelength range) of the second luminescent material light is ≤90%. In a specific embodiment, the first luminescent material may include... Furthermore, in specific embodiments, the second luminescent material may include... .

[0055] As described above, in some embodiments, at least a portion of the light from the first luminescent material can be received by a first dichroic beamsplitter. In some embodiments, the first dichroic beamsplitter can be configured to provide at least a portion of the first portion of the light from the first luminescent material to a beam combiner. In some embodiments, a second portion of the light from the first luminescent material is not provided to the beam combiner. Therefore, in some embodiments, the light generation system may include a beam absorber. In some embodiments, the beam absorber (or blocker, or trap) may be configured to absorb the light beam received by the beam absorber. Therefore, in some embodiments, the beam absorber may include a material with relatively strong absorption and relatively low reflection, such as, for example, carbon nanotubes, anodized aluminum oxide, and / or a nickel phosphate coating. In some embodiments, the beam absorber may be configured downstream of the first dichroic beamsplitter, such that the first dichroic beamsplitter may be configured to provide at least a portion of the second portion of the light from the first luminescent material received by the first dichroic beamsplitter to the beam absorber. In an embodiment, the first dichroic beamsplitter may be configured to provide at least 80%, for example, at least 90%, for example, at least 95%, particularly at least 98%, including 100%, of the second portion of the first luminescent material light received by the first dichroic beamsplitter to the beam absorber. Therefore, in an embodiment, the light generation system may include a beam absorber, wherein the first dichroic beamsplitter may be configured to provide at least a portion of the second portion of the first luminescent material light to the beam absorber. Such embodiments may have advantages because the beam absorber can collect unwanted light and prevent it from propagating through the system and interfering with or escaping from the light generation system, thereby improving the safe operation of the light generation system. Furthermore, in an embodiment, the first dichroic beamsplitter may be configured to direct unconverted device light to the beam absorber, since light-emitting converters such as phosphors typically tend to provide light conversion rates below 100%. Therefore, by configuring the first dichroic beamsplitter to direct unconverted device light to the beam absorber, eye safety of the light generation system can be improved in the event of a failure of one or more components.

[0056] Additionally or alternatively, in embodiments, the first dichroic beamsplitter may be configured to provide a second portion (at least a portion) of the light from the first luminescent material received by the first dichroic beamsplitter (via one or more optical elements) to the second luminescent material. Therefore, in embodiments, the light generating system may include one or more optical elements (or "optical devices").

[0057] The terms "optical device" and "optical element" can refer to the same item. In embodiments, one or more optical elements may include (mirror) reflectors or mirrors. In particular, in embodiments, an optical device may also include one or more mirrors, reflectors, collimators, lenses, prisms, diffusers, phase plates, polarizers, diffraction elements, gratings, dichroic mirrors, arrays of one or more of the above, etc. Alternatively or additionally, the term "optical device" may also refer to holographic elements or mixing rods. In embodiments, an optical device may include beam expander optics and zoom lens optics. In embodiments, an optical device may include integrators, such as "Köhler integrators" (or "Köhler integrators").

[0058] In an embodiment, at least some optical elements may be configured to receive light in relation to a first dichroic beamsplitter. Specifically, in an embodiment, the first dichroic beamsplitter may be configured to provide at least a second portion of the first luminescent material light received by the first dichroic beamsplitter to one or more optical elements. Then, in an embodiment, the one or more optical elements may be configured to guide (e.g., directly guide and / or reflect) the second portion of the first luminescent material light to a second luminescent material. Thus, in an embodiment, the (yellow) second portion of the first luminescent material light may be provided to the second luminescent material.

[0059] In embodiments, the second luminescent material can therefore (also) be configured to convert at least a second portion of the first luminescent material light received by the second luminescent material into second luminescent material light. In particular, in embodiments, the second luminescent material can be configured to convert at least a second portion of the first luminescent material light received by the second luminescent material in the same or similar manner as the third device light received by the second luminescent material (as described above). Therefore, in embodiments, the second luminescent material can be configured to convert at least a second (yellow) portion of the first luminescent material light received by the second luminescent material into (red) reconverted second luminescent material light. Therefore, in embodiments, the light generation system can include one or more optical elements, wherein a first dichroic beam splitter can be configured to provide the second portion of the first luminescent material light to the one or more optical elements, and wherein the one or more optical elements can be configured to guide the second portion of the first luminescent material light to the second luminescent material; wherein the second luminescent material can be configured to convert the second portion of the first luminescent material light received by the second luminescent material into second luminescent material light. This embodiment is advantageous because a second portion of the light from the first luminescent material, which would otherwise be wasted, can be used in this embodiment to improve the light output of the second luminescent material, thereby increasing the red component in the system light.

[0060] Furthermore, in embodiments, the light-emitting material of the light-generating system may include a third light-emitting material. In embodiments, the third light-emitting material may be configured to convert light received by the third light-emitting material into third light-emitting material light. Specifically, in embodiments, the third light-emitting material may be configured to have a light-receiving relationship with the first dichroic beam splitter.

[0061] Additionally or alternatively, in an embodiment, the third luminescent material may be configured to receive light in relation to the second dichroic beam splitter. Therefore, in an embodiment, the third luminescent material may be configured to convert a second portion of the light received by the third luminescent material from the first luminescent material and / or at least a portion of the second portion of the light received by the second luminescent material into light from the third luminescent material.

[0062] In an embodiment, the light from the third luminescent material can be combined with the diffused light from the first device, a first portion of the light from the first luminescent material, and a first portion of the light from the second luminescent material to form a system light beam. Therefore, in an embodiment, the dichroic mirror described above may further include a third dichroic beam splitter. In an embodiment, the third dichroic beam splitter may have a third cutoff wavelength (λ). C3 Therefore, in an embodiment, the third dichroic beam splitter can be configured such that: (i) the reflected or transmitted wavelength is less than (or optionally equal to) the third cutoff wavelength (λ). C3 (ii) light whose transmitted or reflected wavelength is greater than (or optionally equal to) the third cutoff wavelength (λ). C3 The light. In a specific embodiment, the third cutoff wavelength (λ) is the light. C3 It can be selected from the wavelength range of 640-710nm, for example from the wavelength range of 650-700nm, for example from the wavelength range of 675-700nm.

[0063] In one embodiment, the third dichroic beamsplitter can be configured downstream of the third luminescent material. Therefore, in the operating mode of the light generation system, the third dichroic beamsplitter can be configured to receive light from the third luminescent material. Furthermore, in another embodiment, the third dichroic beamsplitter can be configured downstream of the first and / or second dichroic beamsplitters. Therefore, in these embodiments, the third dichroic beamsplitter can be configured (optionally via one or more optical elements) to receive light from the first and / or second dichroic beamsplitters, respectively. Further, in another embodiment, the third dichroic beamsplitter can be configured upstream of the beam combiner, i.e., the third dichroic beamsplitter can be configured in the optical path between the luminescent material and the beam combiner. However, in other embodiments, the third dichroic beamsplitter can also be configured downstream of the beam combiner, as detailed below.

[0064] In an embodiment, the third dichroic beamsplitter may be configured to: (i) transmit at least a portion of the third luminescent material light received by the third dichroic beamsplitter; and (ii) reflect one or more of the diffused first device light, first luminescent material light, and second luminescent material light received by the third dichroic beamsplitter. Alternatively, in an embodiment, the third dichroic beamsplitter may be configured in particular to: (i) reflect at least a portion of the third luminescent material light received by the third dichroic beamsplitter; and (ii) transmit one or more of the diffused first device light, first luminescent material light, and second luminescent material light received by the third dichroic beamsplitter.

[0065] Furthermore, in embodiments, the beam combiner can be configured to receive light in relation to the third dichroic beam splitter. Specifically, the beam combiner can be configured to combine one or more of the diffused first device light, a first portion of the first luminescent material light, a first portion of the second luminescent material light, and the third luminescent material light received by the beam combiner into a system (output) light beam. Therefore, in embodiments, in the operating mode of the light generation system, the system light may include at least a portion of the third luminescent material light. Therefore, in embodiments, the luminescent material may include the third luminescent material; wherein the dichroic mirror may include a third cutoff wavelength (λ). C3 The third dichroic beam splitter, wherein the third cutoff wavelength (λ) C3 The light source can be selected from the range of 650-700nm; wherein the third light-emitting material can be configured to receive light from the first dichroic beam splitter and can be configured to convert light received by the third light-emitting material (at least a portion) into light from the third light-emitting material; and wherein the third dichroic beam splitter can be configured to receive light from the third light-emitting material and can be configured to: (i) transmit light from the third light-emitting material (at least a portion) and reflect diffused light from the first device, the first light-emitting material, and the second light-emitting material (one or more of them), or (ii) reflect light from the third light-emitting material and transmit diffused light from the first device, the first light-emitting material, and the second light-emitting material (one or more of them); wherein the beam combiner can be configured to receive light from the third dichroic beam splitter; wherein in the operating mode of the light generation system, the system light may also include light from the third light-emitting material (at least a portion).

[0066] Such embodiments may be advantageous because adding a third luminescent material can improve the spectral power distribution of the white light output system by introducing a far-red light component (see below). Additionally, such embodiments can also improve the tunability of the CCT of the white system light.

[0067] In embodiments, the third luminescent material may include at least the following types of luminescent materials: oxynitride luminescent materials containing divalent europium or nitride luminescent materials containing divalent europium. In particular, in embodiments, the third luminescent material may include a far-infrared conversion phosphor, such as, for example, a nitride phosphor. Embodiments of such luminescent materials will be described below.

[0068] In this embodiment, the luminescent material may include MS:E u 2+ And / or M2Si5N8:Eu 2+ And / or MAlSiN3Eu 2+ And / or Ca2AlSi3O2N5:Eu 2+ The luminescent material includes, but is not limited to, Ba, Sr, and Ca, with at least Sr included in the embodiments. Therefore, in the embodiments, the luminescent material may include materials selected from... and One or more materials in the group consisting of these compounds. In these compounds, europium (Eu) exists essentially or only in a divalent state, replacing one or more of the divalent cations shown. Typically, the content of Eu does not exceed 10% of the cations. Its content is usually between 0.5% and 10%, and more specifically, about 0.5% to 5% relative to the cations it replaces. The term ":Eu" indicates that a portion of the metal ion is replaced by Eu (in this example, Eu). 2+ (Substitution). For example, assuming the Eu content in CaAlSiN3:Eu is 2%, the correct chemical formula could be... Divalent europium typically substitutes for divalent cations, such as the aforementioned divalent alkaline earth cations, especially Ca, Sr, or Ba. (Materials) It can also be represented as MS:Eu, where M is one or more elements selected from the group consisting of barium (Ba), strontium (Sr), and calcium (Ca); in particular, M in this compound includes calcium or strontium, or calcium and strontium, especially calcium. Eu is introduced herein and substitutes for at least a portion of M (i.e., one or more of Ba, Sr, and Ca). Furthermore, the material It can also be expressed as M is selected from one or more of the group consisting of barium (Ba), strontium (Sr), and calcium (Ca); in particular, M in the compound includes Sr and / or Ba. In another specific embodiment, M consists of Sr and / or Ba (regardless of the presence of Eu), particularly 50% to 100%, more specifically 50% to 90% Ba and 50% to 0%, particularly 50% to 10% Sr, for example (i.e., 75% Ba; 25% Sr). Here, Eu is introduced and replaces at least a portion of M (i.e., one or more of Ba, Sr, and Ca). Similarly, the material... It can also be expressed as M is one or more elements selected from the group consisting of barium (Ba), strontium (Sr), and calcium (Ca); in particular, M in the compound includes calcium or strontium, or calcium and strontium, more specifically, including calcium. Eu is introduced herein and substitutes for at least a portion of M (i.e., one or more of Ba, Sr, and Ca). As those skilled in the art will know, Eu in the above-described luminescent materials exists primarily or only in a divalent state. Therefore, such nitride luminescent materials may also be or include converter elements, particularly Eu herein. 2+ .

[0069] In particular, the luminescent material can be an inorganic luminescent material, such as one or more of the above-mentioned trivalent cerium or divalent europium oxides, oxynitrides or nitrides.

[0070] In embodiments, the red luminescent material may comprise one or more materials selected from the group consisting of (Ba,Sr,Ca)S:Eu, (Ba,Sr,Ca)AlSiN3:Eu, and (Ba,Sr,Ca)2Si5N8:Eu. In these compounds, europium (Eu) is present primarily or only in a divalent state and substitutes for one or more of the divalent cations shown. Typically, the content of Eu does not exceed 10% of the total cations; its content is particularly in the range of about 0.5% to 10%, and more specifically, its content is in the range of about 0.5% to 5% relative to the cations it substitutes. The term ":Eu" indicates that a portion of the metal ion is replaced by Eu (Eu in these examples). 2+ (Substitution). For example, assuming the Eu content in CaAlSiN3:Eu is 2%, the correct chemical formula could be... Divalent europium often substitutes for divalent cations, such as the aforementioned divalent alkaline earth cations, especially calcium, strontium, or barium.

[0071] The material (Ba,Sr,Ca)S:Eu can also be represented as MS:Eu, where M is selected from one or more elements in the group consisting of barium (Ba), strontium (Sr), and calcium (Ca); in particular, M includes calcium or strontium, or calcium and strontium, more specifically, calcium. Eu is introduced herein and replaces at least a portion of M (i.e., one or more of Ba, Sr, and Ca).

[0072] In addition, materials It can also be expressed as M is one or more elements selected from the group consisting of barium (Ba), strontium (Sr), and calcium (Ca); in particular, M in the compound includes Sr and / or Ba. In another specific embodiment, M consists of Sr and / or Ba (without regard to the presence of Eu), particularly of 50% to 100%, more specifically 50% to 90% Ba and 50% to 0%, particularly 50% to 10% Sr, such as... (i.e., 75% Ba; 25% Sr). Eu is introduced here and replaces at least a portion of M, i.e., one or more of Ba, Sr, and Ca.

[0073] Similarly, the material (Ba,Sr,Ca)AlSiN3:Eu can also be represented as M is one or more elements selected from the group consisting of barium (Ba), strontium (Sr), and calcium (Ca); in particular, M in the compound includes calcium or strontium, or calcium and strontium, more specifically calcium. Eu is introduced herein and substitutes for at least a portion of M (i.e., one or more of Ba, Sr, and Ca).

[0074] As described above, in embodiments, the light generating system may include one or more optical elements. In embodiments, at least some of the optical elements may be configured to receive light in relation to a first dichroic beamsplitter. In particular, in embodiments, the first dichroic beamsplitter may be configured to provide a second portion (at least a portion) of the first luminescent material light received by the first dichroic beamsplitter to one or more optical elements. Then, in embodiments, one or more optical elements may be configured to guide (e.g., directly guide and / or reflect) the second portion (at least a portion) of the first luminescent material light to a third luminescent material. Thus, in embodiments, the (yellow) second portion of the first luminescent material light may be provided to the third luminescent material.

[0075] In embodiments, the third luminescent material can be configured to convert at least a second portion of the first luminescent material light received by the third luminescent material into third luminescent material light. Specifically, in embodiments, the third luminescent material can be configured to convert at least 60% (e.g., at least 70%, at least 80%, particularly at least 90%, more specifically at least 95%, including 100%) of the second portion of the first luminescent material light received by the third luminescent material into third luminescent material light. Furthermore, in embodiments, the first luminescent material can be configured to convert up to 100% (e.g., up to 99%, at least 98%, particularly at least 95%, more specifically at least 90%) of the second portion of the first luminescent material light received by the third luminescent material into third luminescent material light. Therefore, in embodiments, the third luminescent material can be configured to convert at least a portion of the (yellow) second portion of the first luminescent material light (received by the third luminescent material) into (red) reconverted third luminescent material light. Therefore, in embodiments, the light generation system may include one or more optical elements, wherein a first dichroic beam splitter may be configured to provide a second portion of the light from a first luminescent material to the one or more optical elements, and wherein the one or more optical elements may be configured to guide the second portion of the light from the first luminescent material to a third luminescent material; wherein the third luminescent material may be configured to convert the second portion of the light from the first luminescent material received by the third luminescent material into third luminescent material light. Such embodiments may be advantageous because the second portion of the light from the first luminescent material, which would otherwise be wasted, can be used in such embodiments to improve the third luminescent material light output of the third luminescent material, thereby increasing the (far)red contribution in the system light.

[0076] As described above, the second luminescent material can provide its light to a second dichroic beamsplitter, which can be configured to reflect a portion (especially the second portion) of the light back to the second luminescent material. Similarly, in embodiments, the dichroic mirror may include a fourth dichroic beamsplitter configured to receive light from a third luminescent material. Therefore, in these embodiments, the fourth dichroic beamsplitter may be positioned between the third luminescent material and the beam combiner. In embodiments, the fourth dichroic beamsplitter may have a fourth cutoff wavelength (λ). C4 Therefore, in an embodiment, the fourth dichroic beam splitter may be configured such that: (i) the reflected or transmitted wavelength is less than (or optionally equal to) the fourth cutoff wavelength (λ). C4 (ii) light whose transmitted or reflected wavelength is greater than (or optionally equal to) the fourth cutoff wavelength (λ). C4 The light. In an embodiment, the fourth cutoff wavelength (λ) is... C4 In particular, it can be used with the first cutoff wavelength (λ) C1 ) are different, that is, λ C4 ≠λ C1Additionally or alternatively, in an embodiment, the fourth cutoff wavelength (λ) C4 In particular, it can be used with the second cutoff wavelength (λ). C2 ) are different, that is, λ C4 ≠λ C2 However, this is not always the case; that is, in some alternative embodiments, the fourth cutoff wavelength (λ) C4 It can be compared with the first cutoff wavelength (λ). C1 ) and / or the second cutoff wavelength (λ) C2 Essentially the same. In a specific embodiment, the fourth cutoff wavelength (λ) C4 It can be selected from the wavelength range of 640-700nm, for example from the wavelength range of 650-680nm, or for example from the wavelength range of 650-660nm.

[0077] In an embodiment, the fourth dichroic beamsplitter may also be configured downstream of the third luminescent material. Therefore, in the operating mode of the light generation system, the fourth dichroic beamsplitter may be configured to receive light from the third luminescent material. Specifically, the fourth dichroic beamsplitter may be configured to transmit at least a portion of the light received from the third luminescent material and reflect at least another portion of the light received from the third luminescent material. In an embodiment, the luminescent material light received by the fourth dichroic beamsplitter may include a first portion and a second portion. In an embodiment, the wavelength of the first portion of the third luminescent material light received by the fourth dichroic beamsplitter may be less than (or optionally equal to) the fourth cutoff wavelength, i.e., <λ. C4 In an embodiment, the second portion of the light from the third luminescent material received by the fourth dichroic beam splitter may have a wavelength greater than (or optionally equal to) the fourth cutoff wavelength, i.e., >λ. C4 In an embodiment, the fourth dichroic beam splitter can therefore be configured such that: (i) the wavelength of the light transmitted (received by the fourth dichroic beam splitter) from the third luminescent material is selected from <λ. C4 (i) the first part (at least part) of the range; (ii) the wavelength of the reflected (received by the fourth dichroic beam splitter) light from the third luminescent material selected from >λ. C4 The second part (at least a portion) of the range. Alternatively, in an embodiment, the fourth dichroic beam splitter may be configured to: (i) reflect (received by the fourth dichroic beam splitter) light from the third luminescent material at a wavelength selected from <λ. C4 (i) the first part (at least part) of the range; (ii) the wavelength of the light transmitted (received by the fourth dichroic beam splitter) from the third luminescent material selected from >λ. C4 The second part (at least part) of the scope.

[0078] In an embodiment, the fourth dichroic beamsplitter can be configured such that light reflected from it is reflected back to the third luminescent material. Configuring the fourth dichroic beamsplitter such that light reflected from it is reflected back to the third luminescent material may be advantageous because the light can be reconverted, thereby increasing the amount of third luminescent material light in the output system light (relative to the fourth cutoff wavelength (λ)). C4 The fourth dichroic beam splitter can be configured to provide at least a portion of the second portion of the light from the third luminescent material (via one or more optical elements) back to the third luminescent material. In such an embodiment, the third luminescent material can be configured to reconvert at least a portion of the second portion of the light from the third luminescent material it receives (thereby increasing the composition of the first portion of the light from the third luminescent material). In a specific embodiment, the fourth dichroic beam splitter can be configured to reflect the second portion of the light from the third luminescent material back to the second luminescent material, such that at least a portion of the reflected second (far-infrared) portion of the luminescent material light can be reconverted by the third luminescent material to the first (far-infrared) portion of the light from the third luminescent material. Therefore, in an embodiment, the dichroic mirror may include a fourth cutoff wavelength (λ). C4 The fourth dichroic beam splitter, wherein the fourth cutoff wavelength (λ) C4 The wavelength of light transmitted through the third luminescent material can be selected from the range of 650-660 nm; wherein the fourth dichroic beam splitter can be configured to receive light from the third luminescent material, and wherein the third dichroic beam splitter can be configured to receive light from the fourth dichroic beam splitter, wherein the fourth dichroic beam splitter can be configured such that: (i) the wavelength of light transmitted through the third luminescent material is selected from <λ C4 The first part, and the wavelength of light reflected by the third luminescent material is selected from >λ. C4 The second part, or (ii) the reflected wavelength is selected from <λ C4 The first part of the light from the third luminescent material and the wavelength of the light transmitted through the third luminescent material are selected from <λ. C4 The second part; and wherein the fourth dichroic beam splitter can be configured to return the second part of the light from the third luminescent material to the third luminescent material.

[0079] Such an embodiment may be advantageous because it can increase the contribution of the first portion of the light from the third luminescent material (with the desired optimal wavelength range) to the second portion of the light from the third luminescent material (with a less desirable or suboptimal wavelength range), thereby improving the contribution of the (far)red to the spectral power distribution of the system light.

[0080] As described above, the light generating system includes components such as luminescent materials and diffusers. These components may (individually) operate in reflective and / or transmissive modes in embodiments, as detailed above. In particular, in embodiments, one or more of the diffuser, the first luminescent material, the second luminescent material (and optionally a third luminescent material) may be configured in reflective mode.

[0081] In embodiments where the luminescent material is configured in a reflective mode, it may be more advantageous to configure the luminescent material on a rotating element, such as a phosphor wheel, phosphor disk, or rotating rod. The luminescent material can, in particular, be composed of a luminescent body. The luminescent body can be a layered structure, such as a self-supporting layer. The luminescent body can also be a coating. The luminescent body may also include a luminescent coating applied to a support (especially a light-transmitting support in a transmission mode). In particular, the luminescent body can be inherently self-supporting. In embodiments, the luminescent material can be provided in the form of a luminescent body, such as a luminescent single crystal, a luminescent glass, or a luminescent ceramic body. Such a luminescent body can be referred to as a "converter" or "luminescent body." For example, in embodiments, a luminescent material containing cerium garnet can be provided in the form of a luminescent single crystal or a luminescent ceramic body. In other embodiments, the luminescent body may include a light-transmitting body in which the luminescent material is embedded. For example, the luminescent body may include a glass body in which the luminescent material is embedded. Alternatively, the glass itself may be luminescent. In other embodiments, the luminescent body may include a polymer body in which the luminescent material is embedded.

[0082] In a specific embodiment, the light emitter comprises a ceramic body having a light-emitting material. Ceramic bodies are known in the art. Alternatively, the light emitter comprises a single crystal. In other specific embodiments, different types of light emitters may be used. Therefore, the body may be particularly selected from single crystals and ceramic bodies.

[0083] In embodiments, the light-emitting body (or "body") may have lateral dimensions of width or length (W or L) or diameter (D) and thickness or height (H). In embodiments, (i) D ≥ H or (ii) W ≥ H and / or L ≥ H. In specific embodiments, L, D, W, and H may be selected from a range of ≤10 mm, for example, especially from a range of ≤5 mm, more specifically from a range of ≤3 mm, and most particularly from a range of ≤2 mm. In particular, the lateral dimensions (such as length, width, and diameter) are at least twice the height, for example, at least five times the height.

[0084] The light-emitting body can have any shape. However, typically, it may include two substantially parallel faces that define its height. Additionally, it may include an edge face bridging the two substantially parallel faces. This edge face may be curved in one or two dimensions. The edge face may also be planar. These two substantially parallel faces may also be referred to as "principal faces" because they provide the maximum external area of ​​the light-emitting body. In embodiments, the light-emitting body may have, for example, a cubic shape, a (non-cubic) cuboid shape, an n-sided prism shape with n at least 5 (such as a pentagonal prism, hexagonal prism), and a cylindrical shape. Other shapes are also possible. In particular, the light-emitting body may be a cuboid, a cylinder, or a (regular) n-sided prism shape, where n is 6 or 8. In the case of a cylindrical shape, the edge face may be a single edge face. In the case of a cuboid, the edge face may include four facets. In the case of a hexagonal prism, the edge face may include six facets.

[0085] Furthermore, in embodiments, when the diffuser is configured in reflection mode, the first device light may include linearly polarized light, such as, for example, p-polarized light and / or s-polarized light. Additionally, in these embodiments, the beam combiner may include a polarization beam splitter. In these embodiments, the polarization beam splitter may be configured to: (i) reflect one of the first and second linearly polarized light received therefrom; and (ii) transmit the other of the first and second linearly polarized light received therefrom. Furthermore, in these embodiments, the light generation system may include a λ / 4 waveplate disposed between the beam combiner and the diffuser. The λ / 4 waveplate may be configured in embodiments to: (i) convert the first linearly polarized light received by the λ / 4 waveplate into first circularly polarized light; and (ii) convert the second circularly polarized light received by the λ / 4 waveplate into second linearly polarized light. Furthermore, in these embodiments, the diffuser may include a polarization-maintaining diffuser. Therefore, the typical process of light propagating from the diffuser to the beam combiner is as follows: (i) a first linearly polarized device light (from the first light generating device) is provided to a λ / 4 waveplate; (ii) the λ / 4 waveplate can convert the first linearly polarized device light into first circularly polarized light and provide it to the diffuser; (iii) the first circularly polarized light is diffused and reflected by the (polarization-preserving) diffuser, so that the diffused second circularly polarized light can propagate back to the λ / 4 waveplate; (iv) the λ / 4 waveplate can convert the diffused second circularly polarized light into diffused second linearly polarized device light; and (v) a polarization beam splitter (included by the beam combiner) combines the diffused second linearly polarized device light with light from one or more types of luminescent materials.

[0086] In a specific embodiment, the diffuser, the first luminescent material, the second luminescent material (and optionally the third luminescent material) (all) can be configured to be in a reflective mode.

[0087] Returning to the light generating device, as described above, a light generating system includes a light generating device that includes a light source and is particularly configured to generate device light. In embodiments, the device light may consist primarily of device light. In other embodiments, the device light may consist primarily of converted light from the light source. In other embodiments, the device light may include (unconverted) light from the light source and converted light from the light source. The light source light may be converted into light from the light source using a luminescent material, and / or into upconverted light using an upconverter (see below). The term "light generating device" may also refer to a plurality of light generating devices that can provide device light having substantially the same spectral power distribution. In specific embodiments, the term "light generating device" may also refer to a plurality of light generating devices that can provide device light with different spectral power distributions.

[0088] The term "light source" can, in principle, refer to any light source known in the art. In specific embodiments, the light source includes solid-state LED light sources (such as LEDs or laser diodes (or "diode lasers")). The term "light source" can also refer to multiple (substantially identical or different) light sources, such as 2-2000 solid-state light sources.

[0089] A light source may have a light-escape surface. For example, for an LED, this could be the LED die, or, when resin is applied to the LED die, the outer surface of the resin. In principle, it could also be the termination of an optical fiber. The term "escape surface" specifically refers to the portion of a light source from which light actually leaves or escapes the light source. The light source is configured to provide a light beam. This beam (and therefore) escapes from the light-escape surface of the light source. Similarly, a light-generating device may include a light-escape surface, such as an end window. Furthermore, a light-generating system may also include a light-escape surface, such as an end window.

[0090] The location where the system light escapes from the light-generating system can also be called the light exit. This can be a light-transmitting window or an opening (in the system). In an embodiment, the light-transmitting window may be provided by optical components.

[0091] The term "light source" can refer to semiconductor light-emitting devices, such as light-emitting diodes (LEDs), resonant cavity light-emitting diodes (RCLEDs), vertical cavity laser diodes (VCSELs), edge-emitting lasers, etc. The term "light source" or "solid-state light source" can also refer to superluminescent diodes (SLEDs).

[0092] In embodiments, the light source may be configured to provide primary radiation for in-situ use, such as a blue light source (e.g., a blue LED), a green light source (e.g., a green LED), and a red light source (e.g., a red LED). Such LEDs may not include a luminescent material (“phosphor”) and may be referred to as direct-color LEDs.

[0093] In some embodiments, the light-generating device may include a light-emitting material. In other embodiments, the light-generating device may include a PCLED. In still other embodiments, the light-generating device may include a direct-emitting LED (i.e., without phosphors). In some embodiments, the light-generating device may include a laser device, such as a laser diode. In some embodiments, the light-generating device may include a superluminescent diode. Therefore, in specific embodiments, the light source may be selected from the group consisting of laser diodes and superluminescent diodes. In still other embodiments, the light source may include an LED.

[0094] This light source can be configured to generate light with an optical axis (O), (beam shape), and spectral power distribution. In embodiments, the light source may include one or more wavelength bands, such as those with bandwidths known in the field of lasers.

[0095] The term "light source" can refer to the light-generating element itself, such as a solid-state light source; or it can refer to a package of the light-generating element, such as a solid-state light source, and one or more of elements including luminescent materials and (other) optical devices (e.g., lenses, collimators). A light-converting element ("converter element" or "converter") can include an element having luminescent materials. For example, a solid-state light source itself, such as a blue LED, is a light source. A combination of a solid-state light source (as a light-generating element) and a light-converter element (optically coupled to the solid-state light source) (e.g., a blue LED and a light-converter element) can also be a light source (but can also be referred to as a light-generating device). Thus, a white LED is a light source (but can also be referred to as a (white) light-generating device). Therefore, in embodiments, the term "light source" can also refer to a light source based on light conversion, such as a light source combined with a luminescent converter material.

[0096] The terms “light source,” “solid-state light source,” or “solid-state material light source,” and similar terms used herein, may in particular refer to semiconductor light sources, including solid-state light sources, such as LEDs, laser diodes, or superluminescent diodes.

[0097] In embodiments, the term "light source" may also refer to a combination of a light source (e.g., an LED) and an optical filter that can alter the spectral power distribution of the light generated by the light source. Specifically, the term "light generating device" may be used to refer to both the light source and additional (optical components), such as optical filters and / or beam shaping elements.

[0098] In embodiments, the phrase "different light sources" or "multiple different light sources" and similar phrases may refer to multiple solid-state light sources selected from at least two different tiers. Similarly, in embodiments, the phrase "identical light sources" or "multiple identical light sources" and similar phrases may refer to multiple solid-state light sources selected from the same tier.

[0099] The term "laser source" specifically refers to a laser. Such lasers are particularly configured to generate laser light having one or more wavelengths in the UV, visible, or infrared range, especially light selected from the spectral range of 200-2000 nm, for example, 300-1500 nm. The term "laser" specifically refers to a device that emits light through a light amplification process based on stimulated emission of electromagnetic radiation. Particularly in embodiments, the term "laser" may refer to a solid-state laser. In specific embodiments, the term "laser" or "laser source" or similar terms refer to a laser diode (or diode laser).

[0100] Therefore, in the embodiments, the light source includes a laser light source. In the embodiments, the terms "laser," "solid-state laser," or "solid-state material laser" may refer to one or more of the following: cerium-doped lithium strontium (or calcium) aluminum fluoride (Ce:LiSAF, Ce:LiCAF), chromium-doped chrysoberyl (alexandrite) lasers, chromium ZnSe (Cr:ZnSe) lasers, divalent samarium-doped calcium fluoride (Sm:CaF2) lasers, Er:YAG lasers, erbium-doped and erbium-ytterbium co-doped lasers... Glass lasers, F-center lasers, holmium YAG (Ho:YAG) lasers, Nd:YAG lasers, NdCrYAG lasers, neodymium-doped yttrium calcium oxyborate (Nd:YCa4O(BO3)3 or Nd:YCOB), neodymium-doped yttrium orthovanadate (Nd:YVO4) lasers, neodymium glass (Nd:glass) lasers, neodymium YLF (Nd:YLF) solid-state lasers, promethium-147-doped phosphate glass (147Pm) 3+ Solid-state lasers (glass), ruby ​​lasers (Al2O3:Cr) 3+ ), Thulium YAG (Tm:YAG) laser, Titanium Sapphire (Ti:Sapphire; Al2O3:Ti) 3+ Lasers include trivalent uranium-doped calcium fluoride (U:CaF2) solid-state lasers, ytterbium-doped glass lasers (rod, sheet / chip and fiber), ytterbium YAG (Yb:YAG) lasers, and Yb2O3 (glass or ceramic) lasers.

[0101] For example, embodiments including second and third harmonic generation may include an F-center laser, a yttrium vanadate (Nd:YVO4) laser, or a promethium-147 doped phosphate glass (147Pm). 3+ (glass) and titanium sapphire (Ti: sapphire; Al2O3: Ti) 3+ One or more of the lasers. For example, considering the generation of second and third harmonics, such light sources can be used to generate blue light.

[0102] In the embodiments, the terms "laser" or "solid-state laser" or "solid-state material laser" may refer to one or more of the following: semiconductor laser diodes, such as GaN, InGaN, AlGaInP, AlGaAs, InGaAsP, lead salts, vertical-cavity surface-emitting lasers (VCSELs), quantum cascade lasers, hybrid silicon lasers, etc.

[0103] As described below, the term "laser source" can also refer to multiple (different or identical) laser sources. In a specific embodiment, the term "laser source" can refer to multiple (identical) laser sources with a number of N. In an embodiment, N = 2 or more. In a specific embodiment, N can be at least 5, and more particularly at least 8. In this way, higher brightness can be obtained. In an embodiment, the laser sources can be arranged as a laser array (see also above). In an embodiment, the laser array includes a heat sink and / or optics, such as lenses for collimating the laser. Therefore, in an embodiment, the lasers in the laser array (or "laser array group") can share the same optics.

[0104] The laser source is configured to generate laser light (or "laser"). The light source may consist primarily of laser light. The light source may also include laser light from two or more (different or identical) laser sources. In a specific embodiment, the light source specifically refers to (collimated) laser light.

[0105] In embodiments, the laser source light may include one or more wavelength bands having bandwidths known in the field of lasers. In specific embodiments, the wavelength bands may be relatively sharp spectral lines, such as having a full width at half maximum (FWHM) of less than 20 nm at RT, for example, equal to or less than 10 nm. Therefore, the source light has a spectral power distribution (energy distribution with intensity varying with wavelength) that may include one or more (narrow) wavelength bands.

[0106] The beam of light (from the source) can be a focused or collimated beam of light from the (laser) source. The term "focused" specifically refers to converging into a small spot. This small spot can be located in the discrete converter region, or (slightly) upstream or (slightly) downstream of it. In particular, focusing and / or collimation can be achieved such that the cross-sectional shape of the beam (perpendicular to the optical axis) in the discrete converter region (at its side) is substantially no larger than the cross-sectional shape (perpendicular to the optical axis) of the discrete converter region (where the source light illuminates the discrete converter region). Focusing can be achieved by one or more optical devices, such as (focusing) lenses. In particular, two lenses can be applied to focus the laser source light. Collimation can be achieved by one or more (other) optical devices, such as collimating elements, like lenses and / or parabolic mirrors. In embodiments, the (laser) source beam can have relatively high collimation, for example, ≤2° (FWHM) in embodiments, more specifically ≤1° (FWHM), and most particularly ≤0.5° (FWHM). Therefore, ≤2° (FWHM) can be considered (highly) collimated source light. Optical devices can be used to provide (high) collimation (see above).

[0107] The term "solid-state material laser" and similar terms may refer to solid-state lasers based on crystals or glasses doped with ions (such as transition metal ions and / or lanthanide ions), or they may refer to fiber lasers, photonic crystal lasers, semiconductor lasers (such as, for example, vertical cavity surface-emitting lasers (VCSELs)).

[0108] Light-emitting diodes (LEDs) are semiconductor light sources that emit light when an electric current passes through them. Electrons in a semiconductor can recombine with electron-hole pairs, releasing energy in the form of photons. The color of the light (corresponding to the energy of the photons) can depend on the energy required for an electron to cross the band gap of the semiconductor.

[0109] Superluminescent diodes (SLEDs) are known in the art. A SLED can be represented as a semiconductor device capable of emitting a broad spectrum of light with low coherence, similar to an LED, while possessing brightness comparable to a laser diode. SLEDs combine the high power and high brightness of laser diodes with the low coherence of conventional LEDs. The low (temporal) coherence of this light source significantly reduces or even eliminates speckle, and its emitted spectral distribution is much wider than that of a laser diode, making it more suitable for lighting applications. For example, in other specific embodiments, the solid-state light source may include a GaN-based SLED, an InGaN-based SLED, or an AlGaN-based SLED.

[0110] This light-generating system can be used as part of or applied to, for example, office lighting systems, home lighting systems, shop lighting systems, residential lighting systems, accent lighting systems, spotlighting systems, theater lighting systems, fiber optic applications, projection systems, self-emissive display systems, pixelated display systems, segmented display systems, warning sign systems, medical lighting applications, 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. The light-generating system (or luminaire) can also be used as part of or applied to optical communication systems or disinfection systems.

[0111] The terms “visible,” “visible light,” or “visible emission,” and similar terms, refer to one or more types of light with wavelengths in the range of about 380-780 nm. In this document, UV may in particular refer to wavelengths selected from the 190-380 nm range, for example, the 200-380 nm range. IR (infrared) is in particular selected from wavelengths in the 780-3000 nm range, for example, the 780-2000 nm range, such as wavelengths up to about 1500 nm, or at least 900 nm, although other wavelengths are possible in specific embodiments.

[0112] In this document, the terms “light” and “radiation” are used interchangeably unless the context clearly indicates that the term “light” refers only to visible light. Therefore, the terms “light” and “radiation” can refer to UV radiation, visible light, and IR radiation. In specific embodiments, particularly for lighting applications, the terms “light” and “radiation” (at least) refer to visible light.

[0113] The terms "blue light" or "blue emission" specifically refer to light with wavelengths in the range of 440-495 nm (including some violet and cyan hues). The terms "green light" or "green emission" specifically refer to light with wavelengths in the range of about 495-570 nm. "Yellow light" or "yellow emission" specifically refers to light with wavelengths in the range of about 570-590 nm. "Orange light" or "orange emission" specifically refers to light with wavelengths in the range of about 590-620 nm. "Red light" or "red emission" specifically refers to light with wavelengths in the range of about 620-780 nm. The phrase "light having one or more wavelengths within a certain wavelength range" and similar expressions may specifically indicate that the spectral power distribution of the indicated light (or radiation) has at least a certain intensity at one or more wavelengths within the indicated wavelength range. For example, a solid-state light source emitting blue light would have a spectral power distribution with a certain intensity at one or more wavelengths within the 440-495 nm wavelength range.

[0114] The light generation system may further include a control system. In an embodiment, the control system may be configured to control the spectral power distribution (and radiant flux) of the system light. Additionally or alternatively, in an embodiment, the control system may be configured to control the correlated color temperature (CCT) of the system light. Additionally or alternatively, in an embodiment, the control system may be configured to control the color rendering index (CRI) of the system light. The control system can achieve the above objectives by controlling one or more light generation devices included in the light generation system. In particular, in an embodiment, the control system may be configured to control one or more of a first light generation device, a second light generation device, and a third light generation device. In an embodiment, the control system may be particularly configured to control two or more of the first light generation device, the second light generation device, and the third light generation device, respectively. The system may be configured to control one or more of the first light generation device, the second light generation device, and the third light generation device such that, in a first operating mode, the system light may have a first correlated color temperature (CCT1). Additionally or alternatively, in embodiments, the control system may be configured to control one or more of the first, second, and third light generating devices such that, in the second operating mode, the system light may have a second correlated color temperature (CCT2). Specifically, in embodiments, the control system may be configured to control a light generating device individually, such that the CCT can change from CCT1 in the first operating mode to CCT2 in the second operating mode, and vice versa. Furthermore, in embodiments, CCT2-CCT1 ≥ 250K, for example, CCT2-CCT1 ≥ 500K, for example, CCT2-CCT1 ≥ 750K, for example, CCT2-CCT1 ≥ 1000K, particularly CCT2-CCT1 ≥ 1500K. In embodiments, CCT2-CCT1 may be at most 5000K, for example, at most 3000K, for example, at most 2500K. Therefore, in the embodiments, the light generating system may include a control system, wherein the control system may be configured to control one or more of the spectral power distribution, correlated color temperature, and color rendering index of the system light, wherein the control system may be configured to control one or more of the first light generating device, the second light generating device, and the third light generating device, such that: (i) in a first operating mode, the system light has a first correlated color temperature (CCT1), and (ii) in a second operating mode, the system light has a second correlated color temperature (CCT2); and wherein CCT2-CCT1≥500K.

[0115] The term "control" and similar terms specifically refer to at least determining the behavior of a component or monitoring its operation. Therefore, "control" and similar terms as used herein can, for example, refer to applying actions to a component (determining the behavior of the component or monitoring its operation), such as measuring, displaying, driving, turning on, switching, changing temperature, etc. Furthermore, "control" and similar terms can also include monitoring. Thus, the term "control" and similar terms can include applying actions to a component, or it can include applying actions to a component and monitoring the component. Control of a component can be accomplished through a control system, which may also be referred to as a "controller." The control system and the component can be functionally coupled, at least temporarily or permanently. A component may include a control system. In embodiments, the control system and the component may not be physically coupled. Control can be performed via wired and / or wireless means. The term "control system" can also refer to multiple different control systems that are functionally coupled to each other, for example, one control system may be a main control system, while one or more other control systems may be controlled from the control system. A control system may include a user interface or be functionally coupled to a user interface.

[0116] The control system can also be configured to receive and execute commands from a remote control. In an embodiment, the control system can be controlled via an app on the device, such as a portable device (e.g., a smartphone, iPhone, tablet, etc.). Therefore, the device is not necessarily directly coupled to the lighting system, but can be (temporarily) functionally coupled to the lighting system.

[0117] Therefore, in embodiments, the control system can also be configured to be controlled via an app on a remote device. In these embodiments, the control system of the lighting system can be controlled by a slave control system or in a slave mode. For example, the lighting system can be identified by a code, specifically a unique code for each lighting system. The control system of the lighting system can be configured to be controlled by an external control system that accesses the lighting system based on knowledge of the (unique) code (input via a user interface with optical sensors, e.g., a QR code reader). The lighting system may also include means for communicating with other systems or devices, such as based on Bluetooth, Thread, Wi-Fi, LiFi, ZigBee, BLE, or WiMAX or other wireless technologies.

[0118] A system, apparatus, or device may perform actions in a “mode,” “operating mode,” or “working mode,” or “operable mode.” The term “operating mode” may also be referred to as “control mode.” Similarly, in a method, actions, stages, or steps may also be performed in a “mode,” “operating mode,” or “working mode.” However, this does not preclude the system, apparatus, or device from being suitable for providing another control mode or multiple other control modes. Likewise, it does not preclude the possibility of performing one or more other modes before and / or after performing this mode.

[0119] However, in embodiments, a control system may exist that is adapted to at least provide a control mode. If other modes exist, the selection of these modes can be achieved, in particular, through a user interface, although other options may also exist, such as executing modes based on sensor signals or a (time) scheme. In embodiments, an operating mode may also refer to a system, apparatus, or device that can only operate in a single operating mode (i.e., "on," without further tunability).

[0120] Therefore, in embodiments, the control system can perform control based on one or more of the following: input signals from the user interface, sensor signals (of the sensor), and / or timers. The term "timer" can refer to a clock and / or a predetermined timing scheme. Specifically, in embodiments, the control system can be configured to control the spectral power distribution of system light based on one or more of the following: input signals from the user interface, sensor signals (of the sensor), and timers. For example, in embodiments, the sensor can be configured to be functionally (e.g., communicatively) coupled to the control system.

[0121] In another aspect, the invention also provides a lamp or luminaire that includes a light-generating system as defined herein. The luminaire may further include a housing, optical elements, a light-shielding grid, 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 a housing opening in the housing through which system light can escape from the housing. In another aspect, the invention also provides a projection device that includes a light-generating system as defined herein. Specifically, 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, for example, 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 selected from the group consisting of lamps, luminaires, projector devices, disinfection devices, photochemical reactors, and optical wireless communication devices, which includes 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 in 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 generating device, a second light generating device, an optical device, etc.

[0122] In addition to terms such as "lighting device" or "lighting system," terms such as "light generating device" or "light generating system" (and similar terms) may also be used. A lighting device or lighting system can be configured to generate device light (or "lighting device light") or system light (or "lighting system light"). As mentioned above, the terms "light" and "radiation" are used interchangeably.

[0123] Lighting devices may include light sources. In embodiments, the light emitted by the device may include one or more of light emitted from a light source and / or light emitted from a converted light source (e.g., light emitted from a luminescent material). Lighting systems may include light sources. In embodiments, the light emitted by the system may include one or more of light emitted from a light source and / or light emitted from a converted light source (e.g., light emitted from a luminescent material). Attached Figure Description

[0124] Embodiments of the present invention are described below by way of example only, with reference to the schematic drawings, wherein corresponding reference numerals denote corresponding components, and in the drawings:

[0125] Figure 1 , Figure 2 , Figures 3A-3B and Figure 4 An embodiment of the light-generating system is schematically depicted.

[0126] Figure 5 The illustrations depict some applications of light-generating systems in lighting equipment.

[0127] The diagram is not necessarily drawn to scale. Detailed Implementation

[0128] Figure 1 A light generating system 1000 configured to provide system light 1001 is schematically depicted. As shown, the light generating system 1000 may include a light generating device 100 configured to generate device light 101, a light emitting material 200, a dichroic mirror 400, a beam combiner 500, and a diffuser 710.

[0129] In an embodiment, the light generating device 100 may include a first light generating device 110 configured to generate first device light 111. Specifically, in an embodiment, the first light generating device 110 may include a first laser group comprising a plurality of first lasers 10 configured to generate first light source light 11. Furthermore, in an embodiment, the light generating device 100 may include a second light generating device 120 configured to generate second device light 121. Specifically, the second light generating device 120 may include a second laser group comprising a plurality of second lasers 20 configured to generate second light source light 21. Furthermore, in an embodiment, the light generating device 100 may include a third light generating device 130 configured to generate third device light 131. Specifically, the third light generating device 130 may include a third laser group comprising a plurality of third lasers 30 configured to generate third light source light 31.

[0130] Furthermore, in the embodiments, the diffuser 710 may be configured to have a light receiving relationship with the first light generating device 110, and may be configured to diffuse at least a portion of the first device light 111 received by the diffuser 710 into diffused first device light 711.

[0131] In an embodiment, the luminescent material 200 may include a first luminescent material 210, a second luminescent material 220, and an optional third luminescent material 230 (see [link to embodiment]). Figures 3A-3B Specifically, in embodiments, the light generating system may include a first light-emitting element 1200 having a first light-emitting material 210, a second light-emitting element 2200 having a second light-emitting material 220, and optionally a third light-emitting element 3200 having a third light-emitting material 230. The light-emitting material 200 may be configured to convert light received by the light-emitting material 200 into light-emitting material light 201.

[0132] In particular, in an embodiment, the first light-emitting material 210 may be configured to receive light from the second light-generating device 120. The first light-emitting material 210 may be configured to convert the second device light 121 received by the first light-emitting material 210 (at least partially) into first light-emitting material light 211 having a first peak emission wavelength (λ1) selected from the wavelength range of 500-540 nm.

[0133] Similarly, in embodiments, the second light-emitting material 220 may be configured to receive light from the third light-generating device 130. Specifically, the second light-emitting material 220 may be configured to convert at least a portion of the third device light 131 received by the second light-emitting material 220 into second light-emitting material light 221 having a second peak emission wavelength (λ2) selected from the wavelength range of 540-590 nm.

[0134] As shown in the figure, in this embodiment, the dichroic mirror 400 may include a first dichroic beam splitter 410 and a second dichroic beam splitter 420. In this embodiment, the first dichroic beam splitter 410 may have a first cutoff wavelength (λ). C1 In a specific embodiment, the first cutoff wavelength (λ) C1 () can be selected from the range of 560-580nm.

[0135] In an embodiment, the first dichroic beam splitter 410 may be configured to be in a light-receiving relationship with the first luminescent material 210. In particular, the first dichroic beam splitter 410 may be configured to: (i) transmit (as shown) or reflect (not shown) light from the first luminescent material at wavelengths selected from <λ. C1 (ii) The wavelength of light reflected (as shown) or transmitted (not shown) by the first luminescent material is selected from >λ. C1 The second part of the scope 211b (at least a portion of it).

[0136] In some embodiments, the light generating system 1000 may include a beam absorber 600. Specifically, in these embodiments, a first dichroic beam splitter 410 may be configured to provide at least a second portion 21lb of the light from the first luminescent material to the beam absorber 600. However, this is not always the case, see, for example, see... Figures 2-4 In this document, reference numeral 570 may refer to optical devices, particularly (converging) lenses.

[0137] Similarly, in an embodiment, the second dichroic beam splitter 420 may have a second cutoff wavelength (λ). C2 In particular, λ C1 ≠λ C2 Furthermore, in a specific embodiment, the second cutoff wavelength (λ) C2 It can be selected from the range of 565-585nm.

[0138] In an embodiment, the second dichroic beam splitter 420 may be configured to receive light from the second luminescent material 220. In particular, the second dichroic beam splitter 420 may be configured to: (i) transmit (as shown) or reflect (not shown) light from the second luminescent material at wavelengths selected from <λ. C2 (i) at least a portion of the first part 221a of the range; (ii) the wavelength of light reflected (as shown) or transmitted (not shown) by the second luminescent material is selected from >λ. C2 The second part of the scope 221b (at least a portion of it).

[0139] Furthermore, in an embodiment, the second dichroic beam splitter 420 may be configured to provide a second portion (at least a portion) of the light 221b from the second luminescent material (through one or more lenses 570) back to the second luminescent material 220.

[0140] In an embodiment, the beam combiner 500 can be configured to receive light from the diffuser 710, the first dichroic beam splitter 410, and the second dichroic beam splitter 420. Therefore, in an embodiment, the beam combiner 500 can be configured to combine one or more of the diffused first device light 711, the first portion 211a of the first luminescent material light, and the second portion 221a of the second luminescent material light received by the beam combiner 500 into a system light beam 1001.

[0141] Furthermore, in the embodiments, in the operating mode of the light generation system 1000, the system light 1001 can be white light with a correlated color temperature in the range of 2000-9000K and a color rendering index (CRI) of at least 70.

[0142] In other embodiments, the light generating system 1000 may further include a control system 300. In embodiments, the control system 300 may be configured to control one or more of the spectral power distribution, correlated color temperature, and color rendering index of the system light 1001. In particular, in embodiments, the control system 300 may be configured to control one or more of the first light generating device 110, the second light generating device 120, and the third light generating device 130, respectively.

[0143] Figure 2A light generating system 1000 is schematically depicted without a beam absorber 600. Here, in embodiments, the light generating system 1000 may (alternatively) include one or more optical elements 550, such as, for example, reflectors and / or light guides. In these embodiments, a first dichroic beam splitter 410 may be configured to provide at least a portion of a second portion 211b of the first luminescent material light to one or more optical elements 550. Subsequently, in embodiments, one or more optical elements 550 may be configured to guide at least a portion of the second portion of the first luminescent material light 211b to a second luminescent material 220. In these embodiments, the second luminescent material 220 may be configured to convert at least a portion of the second portion 211b of the first luminescent material light received by the second luminescent material 220 into second luminescent material light 221. It should be noted that, in embodiments, the optical elements 550 may also be configured to guide light to one or more other elements. For example, such as Figure 3B As shown, optical element 550 can be configured to guide the third luminescent material light 231 to the third dichroic beam splitter 430 (see below), while another optical element 550 can be configured to guide the first luminescent material light 211 (here via the fifth dichroic beam splitter 450) to the third dichroic beam splitter 430.

[0144] Figure 3 schematically depicts an embodiment of the light-generating system 1000, wherein the light-emitting material 200 may include a third light-emitting material 230. Furthermore, as shown, the dichroic mirror 400 may include a third cutoff wavelength (λ). C3 The third dichroic beam splitter 430. Specifically, in an embodiment, the third cutoff wavelength (λ) C3 It can be selected from the range of 650-700nm.

[0145] In such Figure 3B In the illustrated embodiment, the third luminescent material 230 can be configured with the first dichroic beam splitter 410 (and optionally the second dichroic beam splitter 420, see also...) Figure 3B The third light-emitting material 230 can be configured to convert (at least a portion) of the light received by the third light-emitting material 230 into third light-emitting material light 231. Furthermore, in embodiments, the third dichroic beam splitter 430 can be configured to have a light-receiving relationship with the third light-emitting material 230. Therefore, in embodiments, the third dichroic beam splitter 430 can be configured to (i) reflect (as shown) or transmit (not shown) at least a portion of the third light-emitting material light 231 and (ii) transmit (as shown) or reflect (not shown) diffused first device light 711, first light-emitting material light 211, and second light-emitting material light 221 (one or more of these).

[0146] Furthermore, in an embodiment, the beam combiner 500 may be configured to receive light in relation to the third dichroic beam splitter 430. In an embodiment, the beam combiner 500 may be configured such that, in the operating mode of the light generation system 1000, the system light 1001 may further include at least a portion of the third luminescent material light 231.

[0147] In this document, reference numeral 580 may refer to optical devices, particularly integrators.

[0148] like Figure 3A As shown, in this embodiment, the light generating system 1000 may include one or more optical elements 550, such as, for example, a reflector. Here, the third luminescent material light 231 may include light of a wavelength selected from <λ. C3 The wavelengths of light from the first part 231a and the third luminescent material are selected from >λ. C3 The second portion 231b of the range. In these embodiments, the first dichroic beam splitter 410 may be configured to provide at least a portion of the second portion 211b of the first luminescent material light to one or more optical elements 550. Subsequently, in embodiments, one or more optical elements 550 may be configured to direct at least a portion of the second portion 211b of the first luminescent material light to a third luminescent material 230. In embodiments, the third luminescent material 230 may be configured to convert at least a portion of the second portion 211b of the first luminescent material light received by the third luminescent material 230 into third luminescent material light 231.

[0149] Figure 3A An embodiment is also schematically depicted, in which the light generating system 1000 includes a fourth dichroic beamsplitter 440. The fourth dichroic beamsplitter 440 may have a fourth cutoff wavelength (λ). C4 In the embodiment, the fourth cutoff wavelength (λ) C4 The wavelength of light emitted by the third luminescent material 230 can be selected from the range of 650-660 nm. In an embodiment, the fourth dichroic beam splitter 440 can be configured to receive light from the third luminescent material 230. Furthermore, in an embodiment, the third dichroic beam splitter 430 can be configured to receive light from the fourth dichroic beam splitter 440. In an embodiment, the fourth dichroic beam splitter 440 can be specifically configured to: (i) transmit (as shown) or reflect (not shown) light from the third luminescent material at wavelengths selected from <λ. C4 Part 1 231a; (ii) Reflection (as shown) or transmission (not shown) of the wavelength of light from a third luminescent material selected from >λ C4 The second part 231b. Furthermore, in an embodiment, the fourth dichroic beam splitter 440 can be configured to provide the second part 231b of the light from the third luminescent material back to the third luminescent material 230.

[0150] In the above diagram, the diffuser 710, the first luminescent material 210, the second luminescent material 220, and even the third luminescent material 230 are all configured in transmission mode. However, this is not always the case. For example, as... Figure 3B As shown, diffuser 710 can be configured in reflection mode. In this embodiment, when diffuser 710 can be configured in reflection mode, the first device light 111 can particularly include linearly polarized light. Therefore, in this embodiment, beam combiner 500 can include polarization beam splitter 505.

[0151] In particular, in an embodiment, the polarization beamsplitter 505 may be configured to: (i) reflect one of the first linearly polarized light and the second linearly polarized light received by the polarization beamsplitter 505; and (ii) transmit the other of the first linearly polarized light and the second linearly polarized light received by the polarization beamsplitter 505. Furthermore, in an embodiment, when the diffuser 710 is configured in reflection mode, the light generation system 1000 may also include a λ / 4 waveplate 720 disposed between the beam combiner 500 and the diffuser 710. In an embodiment, the λ / 4 waveplate 720 may be configured to: (i) convert the first linearly polarized (device) light into first circularly polarized (device) light; and (ii) convert the second circularly polarized (diffuse) light into second linearly polarized (diffuse) light. Therefore, in such an embodiment, the diffuser 710 may include a polarization-maintaining diffuser such that the first circularly polarized device light 111 received by the diffuser 710 can be diffused into the second circularly polarized diffused device light 711.

[0152] Furthermore, in embodiments, it may be desirable to provide a safety element configured to prevent the light from the luminescent material 201 from back propagating back into the light-generating device 100. For example, in Figure 3B In the illustrated embodiment, a dichroic green light reflector 415 may be disposed between the first light-generating device 110 and the first light-emitting material 210. Similarly, in Figure 3B In the illustrated embodiment, a dichroic red light reflector 425 may be disposed between the second light generating device 120 and the second light-emitting material 220. Additionally or alternatively, in an embodiment, the safety element may include a (metallic) plate with pinholes, allowing the relatively narrow beams of light from the first and / or second devices 111, 121 to pass through, while substantially blocking the relatively wide beams of light from the first and / or second light-emitting materials 211, 221.

[0153] Therefore, in the embodiments, one or more of the diffuser 710, the first luminescent material 210, the second luminescent material 220 (and optionally the third luminescent material 230) can be configured to be in a reflection mode.

[0154] In such Figure 4In the specific embodiment shown, all of the diffuser 710, the first luminescent material 210, the second luminescent material 220 (and optionally the third luminescent material 230) can be configured in a reflective mode. In such embodiments, it is desirable to arrange (or embed) the luminescent material 200 on the rotating element 750, such as a phosphor wheel or phosphor disk. Furthermore, as Figure 3B and Figure 4 As shown, in an embodiment, the light generating system 1000, particularly the dichroic mirror 400, may include a fifth dichroic beamsplitter 450. In an embodiment, the fifth dichroic beamsplitter 450 may be configured to combine the light from the first luminescent material 211 (first portion) and the light from the second luminescent material 221 (first portion) into the same optical path, and direct it toward a third dichroic beamsplitter 430 (e.g., ...). Figure 3B and Figure 4 (as shown) or bundle combiner 500 (e.g.) Figure 4 (As shown). Therefore, in an embodiment, the fifth dichroic beam splitter 450 can be configured to: (i) substantially transmit the first luminescent material light 211 (first portion); and (ii) substantially reflect the second luminescent material light 221 (first portion). Alternatively, in an embodiment (not shown), the fifth dichroic beam splitter 450 can be configured to: (i) substantially reflect the first luminescent material light 211 (first portion); and (ii) substantially transmit the second luminescent material light 221 (first portion).

[0155] Figure 5 An embodiment of luminaire 2 is schematically depicted, which includes the light generating system 1000 as described above. Reference 301 indicates a user interface functionally coupled to a control system 300, which is included in or functionally coupled to the light generating system 1000. In this embodiment, the control system 300 may be configured to control the spectral power distribution of the system light 1001 based on one or more of input signals from the user interface 301, sensor signals, and / or timers. Figure 5 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 that can be used to project images (such as projecting onto a wall), which may also include the light generating system 1000. Therefore, Figure 5An embodiment of a lighting device 1200 is schematically depicted, selected from the group consisting of lamp 1, luminaire 2, projector device 3, disinfection device, photochemical reactor, and optical wireless communication device. The lighting device 1200 includes the light generating system 1000 described herein. In embodiments, this lighting device may be lamp 1, luminaire 2, projector device 3, disinfection device, or optical wireless communication device. Lighting light emanating from the lighting device 1200 is indicated by reference numeral 1201. The lighting light 1201 is primarily composed of system light 1001, and therefore may be system light 1001 in specific embodiments. Reference numeral 1300 refers to a space, such as a room. Reference numeral 1305 refers to the floor, reference numeral 1310 refers to the ceiling, and reference numeral 1307 refers to a wall.

[0156] The term "a plurality of" refers to two or more. The terms "substantially" or "essentially," and similar terms used herein, will be understood by those skilled in the art. "Substantially" or "essentially" may also include embodiments using expressions such as "completely," "thoroughly," or "all." Therefore, in embodiments, adjectives such as "substantially" or "essentially" may be omitted. Where applicable, "substantially" or "essentially" may also refer to 90% or higher, such as 95% or higher, particularly 99% or higher, and even more particularly 99.5% or higher, including 100%.

[0157] The term "comprising" also includes embodiments that "comprise" or "formulate". The article "a" or "an" preceding an element does not exclude the existence of multiple such elements.

[0158] The term “and / or” specifically refers to one or more items mentioned before or 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 “comprising at least the defined kinds and optionally including one or more other kinds”.

[0159] 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 these terms can be used interchangeably where appropriate, and the embodiments of the invention described herein may operate in a different order than that described or shown herein.

[0160] This document describes the condition of a device, apparatus, or system during operation. Those skilled in the art will understand that this invention is not limited to the method of operation or the device, apparatus, or system in operation.

[0161] It should be noted that the above embodiments are merely illustrative of the invention and not limiting, and those skilled in the art can devise many alternative embodiments without departing from the scope of the appended claims. Any reference numerals placed in parentheses in the claims should not be construed as limiting the claims.

[0162] The use of the verb "comprising" and its variations does not exclude the presence of other elements or steps not listed in the claims. Unless the context explicitly requires otherwise, the words "comprising," "including," etc., in the specification and claims should be interpreted in an inclusive sense, rather than an exclusive or exhaustive sense; that is, they should be interpreted as "including but not limited to."

[0163] This invention can be implemented by hardware comprising multiple different elements and a suitably programmed computer. In the device, apparatus, or system claims listing various means, several means can be implemented by the same hardware. The fact that certain measures are described in mutually different dependent claims does not mean that these measures cannot be effectively combined. On the other hand, this invention (therefore) provides a software product that, when run on a computer, enables the implementation (one or more embodiments) of the methods described herein.

[0164] The present invention also provides a control system that can control a device, apparatus, or system, or can perform the methods or processes described herein. Furthermore, the present invention provides a computer program product that, when run on a computer functionally coupled to or composed of a device, apparatus, or system, can control one or more controllable elements of the device, apparatus, or system.

[0165] The present invention is also applicable to devices, apparatuses, or systems that include one or more characterizing features described in the specification and / or drawings. The present invention also relates to methods or processes that include one or more characterizing features described in the specification and / or drawings.

[0166] The various aspects discussed in this patent can be combined to provide additional advantages. Furthermore, those skilled in the art will understand that these embodiments can be combined, or more than two embodiments can be combined. Moreover, certain features can form the basis of one or more divisional applications.

Claims

1. A light generating system (1000) configured to provide system light (1001); the light generating system (1000) includes a light generating device (100), a first light-emitting material (210), a second light-emitting material (220), a dichroic mirror (400), a beam combiner (500), and a diffuser (710), wherein: - Each of the light generating devices (100) includes a solid-state light source selected from the group consisting of light-emitting diodes, laser diodes, and superluminescent diodes; wherein the light generating device (100) includes a first light generating device (110) configured to generate a first device light (111), a second light generating device (120) configured to generate a second device light (121), and a third light generating device (130) configured to generate a third device light (131); wherein the first device light (111), the second device light (121), and the third device light (131) each have a centroid wavelength selected from the wavelength range of 440 nm to 490 nm; - The diffuser (710) is configured to receive light from the first light generating device (110) and is configured to diffuse the first device light (111) received by the diffuser (710) into diffused first device light (711). - The first light-emitting material (210) is configured to have a light-receiving relationship with the second light-generating device (120) and is configured to convert the second device light (121) received by the first light-emitting material (210) into first light-emitting material light (211), the first light-emitting material light having a first peak emission wavelength (λ1) selected from the wavelength range of 500nm to 540nm. - The second light-emitting material (220) is configured to be in a light-receiving relationship with the third light-generating device (130) and is configured to convert the light (131) received by the third device by the second light-emitting material (220) into light (221) of the second light-emitting material, the second light-emitting material having a second peak emission wavelength (λ2) selected from the wavelength range of 540 nm to 590 nm. - The dichroic mirror (400) includes a first cutoff wavelength (λ). C1 The first dichroic beam splitter (410) and the second cutoff wavelength (λ) C2 The second dihedral beam splitter (420); where λ C1 ≠λ C2 ;in: - The first dichroic beam splitter (410) is configured to be in a light-receiving relationship with the first light-emitting material (210), and is configured to: (i) transmit light from the first light-emitting material at wavelengths selected from less than λ. C1 The first portion (211a) of the range, and the wavelength of light reflected by the first luminescent material is selected from those greater than λ. C1 The second part of the range (211b); or (ii) the wavelength of light reflecting the first luminescent material is selected from less than λ. C1 The first portion (211a) of the range, and the wavelength of light transmitted through the first luminescent material is selected from those greater than λ. C1 The second part of the scope (211b); and - The second dichroic beam splitter (420) is configured to be in a light-receiving relationship with the second light-emitting material (220), and is configured to: (i) transmit light from the second light-emitting material at wavelengths selected from less than λ. C2 The first part (221a) of the range, and the wavelength of light reflected by the second luminescent material is selected from greater than λ. C2 The second part of the range (221b); or (ii) the wavelength of light reflecting the second luminescent material is selected from less than λ. C2 The first part of the range (221a) transmits light from the second luminescent material at wavelengths selected from those greater than λ. C2 The second portion (221b) of the range; wherein the second dichroic beam splitter (420) is configured to provide the second portion (221b) of the light from the second luminescent material back to the second luminescent material (220); - The beam combiner (500) is configured to receive light with the diffuser (710), the first dichroic beam splitter (410) and the second dichroic beam splitter (420); wherein the beam combiner (500) is configured to combine the diffused first device light (711), the first portion (211a) of the first luminescent material light and the first portion (221a) of the second luminescent material light received by the beam combiner (500) into a system light (1001) beam; - (i) the light generating system (1000) further includes a beam absorber (600), wherein the first dichroic beam splitter (410) is configured to provide at least 90% of the second portion (211b) of the first luminescent material light to the beam absorber (600); or wherein (ii) the light generating system (1000) further includes one or more optical elements (550), wherein the first dichroic beam splitter (410) is configured to provide the second portion (211b) of the first luminescent material light to the one or more optical elements (550), wherein the one or more optical elements (550) are configured to guide the second portion (211b) of the first luminescent material light to the second luminescent material (220), and wherein the second luminescent material (220) is configured to convert the second portion (211b) of the first luminescent material light received by the second luminescent material (220) into second luminescent material light (221); and In the operating mode of the light generating system (1000), the system light (1001) is white light, which has a correlated color temperature selected from 2000K to 9000K and a CRI of at least 70.

2. The light generation system (1000) according to claim 1, wherein the first cutoff wavelength (λ) C1 (Selected from the range of 560nm to 580nm) 3. The light generating system (1000) according to claim 1, wherein the second cutoff wavelength (λ) C2 (Selected from the range of 565nm to 585nm) 4. The light generating system (1000) according to any one of the preceding claims, wherein the first light-emitting material (210) comprises of type The luminescent material, wherein the second luminescent material (220) comprises a type of The luminescent material, wherein A' comprises one or more of La, Gd, and Tb, and wherein B comprises one or more of Al, Ga, In, and Sc; wherein - and - and and - and .

5. The light generating system (1000) according to any one of the preceding claims, wherein the first dichroic beam splitter (410) is configured to provide at least 98% of the second portion (211b) of the light from the first luminescent material to the beam absorber (600).

6. The light generating system (1000) according to any one of the preceding claims, wherein the spectral power distribution of the light from the first luminescent material overlaps with the spectral power distribution of the light from the second luminescent material by 90% or less.

7. The light generating system (1000) according to any one of the preceding claims, wherein the light generating system (1000) further comprises a third luminescent material (230); wherein the dichroic mirror (400) comprises a material having a third cutoff wavelength (λ). C3 The third dichroic beam splitter (430), wherein the third cutoff wavelength (λ) C3 The light source is selected from the range of 650 nm to 700 nm; wherein the third light-emitting material (230) is configured to have a light-receiving relationship with the first dichroic beam splitter (410) and is configured to convert the light received by the third light-emitting material (230) into third light-emitting material light (231); and wherein the third dichroic beam splitter (430) is configured to have a light-receiving relationship with the third light-emitting material (230) and is configured to (i) transmit the third light-emitting material light (231) and reflect the diffused first device light (711), and the light source is selected from the range of 650 nm to 700 nm; wherein the third light-emitting material (230) is configured to have a light-receiving relationship with the first dichroic beam splitter (41 ... to have a light-receiving relationship with the first dichroic beam splitter (410) and is configured to (i) transmit the third light-emitting material light (231) and reflect the diffused first device light (711), and the light source is selected to have a light-receiving relationship with the first dichroic beam splitter (410) and is configured to (i) transmit the third light-emitting material light (231) and reflect the diffused first device light (711), and the light source is selected to have a light-receiving relationship with the first dichroic beam splitter (410) and is configured to (i The first luminescent material light (211) and the second luminescent material light (221), or (ii) reflecting the third luminescent material light (231) and transmitting the diffused first device light (711), the first luminescent material light (211) and the second luminescent material light (221); wherein the beam combiner (500) is configured to be in a light receiving relationship with the third dichroic beam splitter (430); wherein in the operating mode of the light generation system (1000), the system light (1001) further includes the third luminescent material light (231).

8. The light generating system (1000) according to claim 7, wherein the light generating system (1000) includes one or more optical elements (550), wherein the first dichroic beam splitter (410) is configured to provide the second portion (211b) of the first luminescent material light to the one or more optical elements (550), and wherein the one or more optical elements (550) is configured to guide the second portion (211b) of the first luminescent material light to the third luminescent material (230); wherein the third luminescent material (230) is configured to convert the second portion (211b) of the first luminescent material light received by the third luminescent material (230) into third luminescent material light (231).

9. The light generating system (1000) according to any one of claims 7 to 8, wherein the dichroic mirror (400) includes a fourth dichroic beam splitter (440) having a fourth cutoff wavelength (λ). C4 ), wherein the fourth cutoff wavelength (λ) C4 The wavelength of light transmitted through the third luminescent material (230) is selected from the range of 650 nm to 660 nm; wherein the fourth dichroic beam splitter (440) is configured to be in a light-receiving relationship with the third luminescent material (230), and wherein the third dichroic beam splitter (430) is configured to be in a light-receiving relationship with the fourth dichroic beam splitter (440); wherein the fourth dichroic beam splitter (440) is configured to: (i) transmit light from the third luminescent material at wavelengths selected from less than λ C4 The first part (231a) reflects light from the third luminescent material at wavelengths selected from those greater than λ. C4 The second part (231a); or (ii) the wavelength of light reflecting the third luminescent material is selected from less than λ. C4 The first part (231a) transmits light from the third luminescent material at wavelengths selected from those greater than λ. C4 The second part (231b); and wherein the fourth dichroic beam splitter (440) is configured to provide the second part (23lb) of the light from the third luminescent material back to the third luminescent material (230).

10. The light generating system (1000) according to any one of claims 7 to 9, wherein the third luminescent material (230) comprises at least the following types of luminescent materials: oxynitride luminescent materials containing divalent europium or nitride luminescent materials containing divalent europium.

11. The light generating system (1000) according to any one of the preceding claims, wherein the first light generating device (110) includes a first laser group, the first laser group including a plurality of first lasers (10); wherein the second light generating device (120) includes a second laser group, the second laser group including a plurality of second lasers (20); and wherein the third light generating device (130) includes a third laser group, the third laser group including a plurality of third lasers (30).

12. The light generating system (1000) according to any one of the preceding claims, wherein the diffuser (710), the first luminescent material (210) and the second luminescent material (220) are configured in a reflection mode.

13. The light generating system (1000) according to any one of the preceding claims further includes a control system (300), wherein the control system (300) is configured to control one or more of the spectral power distribution, the correlated color temperature, and the color rendering index of the system light (1001), wherein the control system (300) is configured to control the first light generating device (110), the second light generating device (120), and the third light generating device (130) such that: (i) in a first operating mode, the system light (1001) has a first correlated color temperature CCT1, and (ii) in a second operating mode, the system light (1001) has a second correlated color temperature CCT2; and wherein CCT2-CCT1 ≥ 500K.

14. The light generation system (1000) according to claim 13, wherein the control system (300) is configured to control the spectral power distribution of the system light (1001) according to one or more of an input signal from a user interface, a sensor signal, and a timer.

15. A lighting device (1200) selected from the group consisting of lamps (1), luminaires (2), projector devices (3), disinfection devices, photochemical reactors and optical wireless communication devices, including a light generating system (1000) according to any one of the preceding claims.

Images