Light generating system

Abstract

A light generating system (1) includes: a first LED light source (3) configured to emit a first blue LED light (4); a first phosphor element (5) configured to convert the first blue LED light (4) into a first red converted light (6); a second LED light source (7) configured to emit a second blue LED light (8), the first phosphor element also configured to convert the second blue LED light (8) into a second red converted light (9); a first dichroic mirror (10) disposed and configured to combine the first red converted light (6) and the second red converted light (9); a third LED light source (11) configured to emit a third blue LED light (12); a fourth LED light source (13) configured to emit a fourth blue LED light (14); a second phosphor element (15) configured to convert the fourth blue LED light (14) into a first green converted light (16); and one or more second dichroic mirrors (17; 171, 172) disposed downstream of the third LED light source (11) and the second phosphor element (15). The first dichroic mirror (10) and one or more second dichroic mirrors (17; 171, 172) are configured to combine the first red conversion light (6), the second red conversion light (9), the third blue LED light (12) and the first green conversion light (16) to form the system light (2).

Description

Technical Field

[0001] This invention relates to a light-generating system configured to emit system light during operation. The invention also relates to a lamp or luminaire including the light-generating system.

[0002] As used in this article, the term "blue light" is intended to refer to light with a peak wavelength falling within the wavelength range of 420 nm to 490 nm.

[0003] As used in this article, the term "green light" is intended to refer to light with a peak wavelength falling within the wavelength range of 490 nm to 560 nm.

[0004] As used in this article, the term "violet light" is intended to refer to light with a peak wavelength falling within the wavelength range of 380 nm to 420 nm.

[0005] As used in this article, the term "red light" is intended to refer to light whose peak wavelength falls within the wavelength range of 600 nm to 700 nm.

[0006] As used herein, the terms “upstream” and “downstream” are intended to be understood relative to the direction of light propagation through the light-generating system. In other words, when a first component or feature is arranged “downstream” of a second component or feature, it can be understood that the first component or feature is arranged in a light-receiving relationship with the second component or feature.

[0007] As used herein, the term “LED light source” is intended to refer to any light source that includes one or more LEDs, including one or more LEDs without any additional optics.

[0008] As used herein, the term “LED” is intended to refer to all light-emitting diodes, laser diodes, and superluminescent diodes. Background Technology

[0009] High-brightness LED light generation systems are used in various applications, such as projection and stage lighting. The aim is to improve the brightness and / or color quality of the system light emitted by such systems.

[0010] US 2022 / 0177719 A1 discloses a narrowband emitting phosphor material and also discloses an LED package including a light source optically or radiatively coupled to a color conversion film, the color conversion film including a narrowband emitting phosphor. Optical or radiative coupling or connection means that radiation emitted from the light source can excite the phosphor material in the color conversion film, and the color conversion film can emit light in response to the excitation by radiation. The color conversion film can be disposed on at least a portion or part of the light source, or it can be located at a distance from the light source.

[0011] US11042080B2 discloses a light source module having first to third light sources providing first, second, and third light, respectively; first and second wavelength conversion layers; first and second auxiliary light sources providing first and second auxiliary light, respectively; and a dichroic element. The first wavelength conversion layer is excited from different sides by the first light source and the first auxiliary light to generate first converted light. The second wavelength conversion layer is excited from different sides by the second light source and the second auxiliary light to generate second converted light. The dichroic element allows the first and second auxiliary light to pass through it and reflects the first and second converted light. The third light is transmitted through the dichroic element. The first, second, and third converted lights have different wavelength ranges, and they are combined to form illumination light.

[0012] US2021 / 373429A1 discloses a light engine projection device, including: a first green light device configured to emit a green light beam, a first blue light device configured to emit a blue light beam, and a first red light device configured to emit a red light beam. A first beam combiner is configured to combine at least two beams from at least two light devices in the same optical collimation channel to form a coaxial optical path. The first beam combiner includes at least one wedge-shaped dichroic mirror or diffraction grating.

[0013] However, conventional high-brightness LED light generation systems provide white light with poor brightness and / or poor color quality. Therefore, it is desirable to provide an LED light generation system in which the brightness and / or color quality of the system light emitted by the system are improved. Summary of the Invention

[0014] The purpose of this invention is to overcome this problem and provide an LED light generating system in which the brightness and / or color quality of the system light emitted by such system is improved.

[0015] According to a first aspect of the invention, this and other objectives are achieved by a light generating system configured to emit system light during operation, the light generating system comprising: a first LED light source configured to emit first blue LED light during operation; a first phosphor element disposed downstream of the first LED light source and configured to at least partially convert the first blue LED light into first red converted light; a second LED light source configured to emit second blue LED light during operation, wherein the first phosphor element is disposed downstream of the second LED light source and wherein the first phosphor element is further configured to at least partially convert the second blue LED light into second red converted light; and a first dichroic mirror disposed between the first phosphor element and the second LED light source and configured to combine the first red converted light with the second red converted light, wherein the first dichroic mirror is transparent to the second blue LED light but reflective to both the first and second red converted light; or wherein the first dichroic mirror is reflective to the second blue LED light but transparent to both the first and second red converted light. A third LED light source is configured to emit a third blue LED light during operation; a fourth LED light source is configured to emit a fourth blue LED light during operation; a second phosphor element is disposed downstream of the fourth LED light source and configured to at least partially convert the fourth blue LED light into a first green converted light; and one or more second dichroic mirrors are disposed downstream of the third LED light source and the second phosphor element, wherein the one or more second dichroic mirrors are transparent to the third blue LED light and reflective to the first green converted light, or wherein the one or more second dichroic mirrors are reflective to the third blue LED light and transparent to the first green converted light; wherein the first dichroic mirror and the one or more second dichroic mirrors are configured to combine the first red converted light, the second red converted light, the third blue LED light, and the first green converted light in combination to form a system light; and wherein the system light is white light with a correlated color temperature in the range of 2000K to 9000K and a color rendering index of at least 70.

[0016] Thus, an LED light generating system is provided, wherein the brightness and / or color quality of the system light emitted by the system is improved.

[0017] The color rendering index can be at least 80, preferably at least 85, or most preferably at least 88.

[0018] The correlated color temperature of white light can range from 2700K to 6500K (for general lighting applications) or from 6500K to 9000K (for special lighting applications such as stage lighting).

[0019] The white light spot can be located within 12 SDCM of BBL, more preferably within 10 SDCM of BBL, and most preferably within 10 SDCM of BBL.

[0020] The first phosphor element can also be configured to completely convert the second blue LED light into the second red converted light.

[0021] The first phosphor element can be configured to completely convert the first blue LED light into the first red converted light.

[0022] The second phosphor element can also be configured to completely convert the fourth blue LED light into the first green converted light.

[0023] The second phosphor element can be arranged upstream of the first dichroic mirror, and the first dichroic mirror can be configured to combine the first red conversion light, the second red conversion light, and the first green conversion light.

[0024] The second phosphor element may be arranged downstream of the first dichroic mirror, and one or more second dichroic mirrors are configured to combine the first red conversion light, the second red conversion light, and the first green conversion light.

[0025] The LED light generating system may further include one or more of the following: (i) a first optical element disposed downstream of a first phosphor element and upstream of a first dichroic mirror, and configured to collimate a first red conversion light and a second red conversion light; (ii) a second optical element disposed downstream of a second LED light source and configured to collimate a second blue LED light; (iii) a third optical element disposed downstream of a third LED light source and configured to collimate a third blue LED light; and (iv) a fourth optical element disposed downstream of the second phosphor element and configured to collimate a first green conversion light.

[0026] Thus, an LED light generating system is obtained, wherein the brightness of the system light emitted by such a system is further improved. Furthermore, the resulting system light becomes more uniform.

[0027] The LED light generation system further includes a fifth LED light source configured to emit a first red LED light during operation. The peak emission wavelength λ5 of the first red LED light is at least 10 nm larger or at least 10 nm smaller than the peak emission wavelengths λ1 and λ2 of both the first red converted light and the second red converted light. The first dichroic mirror and one or more second dichroic mirrors are configured to combine the first red converted light, the second red converted light, the third blue LED light, the first green converted light, and the first red LED light in combination to form system light.

[0028] In one embodiment, a first dichroic mirror is further disposed downstream of a fifth LED light source, wherein the first dichroic mirror is transparent to the first red LED light and reflective to the first red converted light and the second red converted light; or wherein the first dichroic mirror is also reflective to the first red LED light and transparent to the first red converted light and the second red converted light; wherein one or more second dichroic mirrors are further disposed downstream of the fifth LED light source and are reflective to the first red LED light, or transparent to the first red LED light.

[0029] Thus, an LED light generating system is achieved, in particular, in which the color quality of the light emitted by such a system is further improved. Furthermore, since both the fifth LED light source emitting the first red LED light and the "KSiF-type" phosphor are narrow-band red light emitters, they can be used in combination.

[0030] The peak emission wavelength λ5 can be at least 15 nm, at least 20 nm, or at least 25 nm larger than the peak emission wavelengths λ1 and λ2 of the first and second red conversion light.

[0031] The LED light generation system may also include a fifth optical element, which is arranged downstream of the fifth LED light source and configured to collimate the first red LED light.

[0032] Thus, an LED light generating system is provided, in particular the brightness of the light emitted by such a system is further improved. Furthermore, the resulting light becomes more uniform.

[0033] The LED light generation system may further include a sixth LED light source configured to emit a fifth blue LED light during operation, wherein a second phosphor element is disposed downstream of the sixth LED light source and wherein the second phosphor element is further configured to at least partially convert the fifth blue LED light into a second green converted light, wherein one or more second dichroic mirrors are disposed downstream of the sixth LED light source and wherein the one or more second dichroic mirrors are also transparent to the fifth blue light but reflective to the second green converted light, or wherein the one or more second dichroic mirrors are also reflective to the fifth blue light but transparent to the second green converted light, wherein the first dichroic mirror and one or more second dichroic mirrors are configured to combine the first red converted light, the second red converted light, the third blue LED light, the first green converted light, the second green converted light, and (if provided) the first red LED light in combination to form system light.

[0034] Thus, an LED light generating system is provided, wherein the brightness and / or color quality of the system light emitted by the system is improved.

[0035] The second phosphor element can also be configured to completely convert the fifth blue LED light into the second green converted light.

[0036] One or more of the following may be applied: (i) the LED light generation system may also include a sixth optical element downstream of the sixth LED light source, the sixth optical element being configured to collimate the fifth blue LED light; (ii) the fourth optical element may also be configured to collimate the second green conversion light.

[0037] Thus, an LED light generating system is obtained, in particular the brightness of the system light emitted by this system is further improved. Furthermore, the resulting system light becomes more uniform.

[0038] The LED light generation system may further include: a seventh LED light source configured to emit first violet LED light during operation; a third phosphor element disposed downstream of the seventh LED light source and configured to at least partially convert the first violet LED light into first blue converted light; and a third dichroic mirror disposed downstream of the seventh LED light source, the third dichroic mirror being reflective to the first blue converted light or transparent to the first blue converted light, wherein the first dichroic mirror and one or more second dichroic mirrors are also disposed downstream of the third phosphor element and are also transparent to the first blue converted light, and wherein the first dichroic mirror, one or more second dichroic mirrors and the third dichroic mirror are configured to combine the first red converted light, the second red converted light, the third blue LED light, the first green converted light, the first blue converted light and (if provided) the second green converted light and (if provided) the first red LED light to form system light.

[0039] Thus, an LED light generating system is provided, wherein the brightness and / or color quality of the system light emitted by the system is improved.

[0040] The third phosphor element can also be configured to completely convert the first purple LED light into the first blue converted light.

[0041] The LED light generating system may also include a seventh optical element, which is arranged downstream of the third phosphor element and upstream of the third dichroic mirror, and is configured to collimate the first blue conversion light.

[0042] Thus, an LED light generating system is obtained, in particular, in which the brightness of the system light emitted by such a system is further improved. Furthermore, the resulting system light is also more uniform.

[0043] The LED light generating system may further include an eighth LED light source configured to emit a second violet LED light during operation, wherein a third phosphor element is disposed downstream of the eighth LED light source and wherein the third phosphor element is further configured to at least partially convert the second violet LED light into a second blue converted light, wherein a third dichroic mirror is further disposed downstream of the eighth LED light source and wherein the third dichroic mirror is transparent to the second violet LED light but reflective to the second blue converted light, or wherein the third dichroic mirror is reflective to the second violet LED light but transparent to the second blue converted light, wherein a first dichroic mirror, one or more second dichroic mirrors, and a third dichroic mirror are configured to combine a first red converted light, a second red converted light, a third blue LED light, a first green converted light, a first blue converted light, a second blue converted light, (if provided) a second green converted light, and (if provided) a first red LED light to form system light.

[0044] Thus, an LED light generating system is provided, wherein the color quality of the system light emitted by such a system is further improved.

[0045] The third phosphor element can also be configured to completely convert the second purple LED light into the second blue converted light.

[0046] One or more of the following may apply: (i) the LED light generating system further includes an eighth optical element arranged downstream of the eighth LED light source and configured to collimate the second purple LED light; (ii) the seventh optical element is also configured to collimate the second blue conversion light.

[0047] Thus, an LED light generating system is obtained, in particular the brightness of the system light emitted by this system is further improved. Furthermore, the resulting system light becomes more uniform.

[0048] The LED light generation system may further include a ninth LED light source configured to emit a third violet LED light during operation, wherein a first dichroic mirror, one or more second dichroic mirrors, and a third dichroic mirror are also arranged downstream of the ninth LED light source and are transparent to the third violet LED light, and wherein the first dichroic mirror, one or more second dichroic mirrors, and the third dichroic mirror are configured to combine a first red conversion light, a second red conversion light, a third blue LED light, a first green conversion light, a third violet LED light, (if provided) a second green conversion light, (if provided) a first blue conversion light, (if provided) a second blue conversion light, and (if provided) a first red LED light to form system light.

[0049] Thus, an LED light generating system is provided, wherein the brightness and / or color quality of the system light emitted by the system is improved.

[0050] The LED light generation system may also include a ninth optical element, which is arranged downstream of the ninth LED light source and configured to collimate the third purple LED light.

[0051] Thus, an LED light generating system is obtained, in particular the brightness of the system light emitted by this system is further improved. Furthermore, the resulting system light becomes more uniform.

[0052] Any one or more of the first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth optical elements can be lenses.

[0053] The first phosphor element may include a phosphor of type M'xM2-2xAX6 doped with tetravalent manganese, wherein M' includes an alkaline earth cation, wherein M includes a basic cation, x ranges from 0 to 1, wherein A includes a tetravalent cation, and wherein X includes a monovalent anion containing at least fluorine (F).

[0054] Therefore, the first and second red-converted lights exhibit good red quality. Furthermore, these phosphors are stable and efficient phosphors. This is because these phosphors have relatively narrow emission bands.

[0055] In an embodiment, the first phosphor element may include a KSiF type phosphor.

[0056] The second phosphor element may include an A3B5O12:Ce type phosphor, wherein A includes one or more of Y, La, Gd, Tb and Lu, and B includes one or more of Al, Ga, In and Sc.

[0057] This phosphor is a stable and efficient phosphor that can be applied directly to the top of an LED and has a good lifespan.

[0058] The third type of phosphor can be the BOSE phosphor.

[0059] This provides both first and second green conversion light with a good appearance. Furthermore, this type of phosphor is a stable and efficient phosphor and can be applied directly to the top of the LED, exhibiting a good lifespan.

[0060] In an embodiment, the light generating system may further include a controller configured to control a first LED light source, a second LED light source, a third LED light source, a fourth LED light source, and (if provided) a fifth LED light source, and (if provided) a sixth LED light source, and (if provided) a seventh LED light source, and (if provided) an eighth LED light source and (if provided) a ninth LED light source, respectively, for example, to change one or more of the intensity, color rendering index, and correlated color temperature of the system light (e.g., differing by at least 500K or at least 1000K).

[0061] The present invention also relates to a lamp or luminaire comprising a light generating system according to the present invention.

[0062] Because of this light-generating system, lamps or luminaires can provide system light with improved brightness and / or improved color quality.

[0063] A lamp or lamp fixture can be any type of lamp or lamp fixture, but it specifically refers to stage lighting fixtures or devices.

[0064] It is worth noting that the present invention relates to all possible combinations of the features listed in the claims. Attached Figure Description

[0065] This aspect and other aspects of the invention will now be described in more detail with reference to the accompanying drawings, which illustrate embodiments of the invention.

[0066] Figure 1 An embodiment of the light generation system according to the present invention is illustrated schematically.

[0067] Figure 2 Another embodiment of the light generation system according to the present invention is illustrated schematically.

[0068] Figure 3 Another embodiment of the light generation system according to the present invention is illustrated schematically.

[0069] Figure 4 Another embodiment of the light-generating system according to the present invention is illustrated schematically.

[0070] Figure 5 Another embodiment of the light generation system according to the present invention is illustrated schematically.

[0071] Figures 6-13 Other possible embodiments of the light generation system according to the present invention are illustrated schematically.

[0072] Figure 14The graph shows the intensity (in arbitrary units) of the KSiF phosphor and the intensity (in arbitrary units) of the red light emitted by a directly emitting red LED as a function of the emission wavelength Em and the excitation wavelength Ex, indicated by the dashed line.

[0073] Figure 15 The graph shows the intensity (in arbitrary units) of LuAG phosphor as a function of emission wavelength Em and excitation wavelength Ex.

[0074] As shown in the figures, for ease of explanation, the dimensions of each layer and region have been enlarged to illustrate the overall structure of the embodiments of the present invention. The same reference numerals refer to the same elements throughout the text. Detailed Implementation

[0075] The present invention will now be described in more detail with reference to the accompanying drawings, which illustrate presently preferred embodiments of the invention. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments described herein; these embodiments are provided to fully and completely illustrate the invention and to clearly demonstrate the scope of the invention to those skilled in the art.

[0076] Figure 1 An embodiment of a light generating system 1 according to the present invention is illustrated schematically. Generally, regardless of the specific embodiment, the light generating system 1 includes a first LED light source 3, a first phosphor element 5 disposed downstream of the first LED light source 3, a second LED light source 7, a first dichroic mirror 10, a third LED light source 11, a fourth LED light source 12, a second phosphor element 15 disposed downstream of the fourth LED light source 12, and one or more second dichroic mirrors 17, 171, 172.

[0077] The first LED light source 3 is configured to emit a first blue LED light 4 during operation (see...). Figures 6-13 The first LED light source 3 may be at least partially and optionally completely covered by the first phosphor element 5. The first phosphor element 5 is disposed downstream of the first LED light source 3. The first phosphor element 5 is configured to at least partially and optionally completely convert the first blue LED light 4 into the first red converted light 6. The first phosphor element 5 includes a phosphor doped with tetravalent manganese. A type of phosphor, wherein M' includes an alkaline earth cation, M includes a basic cation, x ranges from 0 to 1, A includes a tetravalent cation, such as one or more of silicon and / or titanium, and X includes a monovalent anion including at least fluorine.

[0078] The second LED light source 7 is configured to emit a second blue LED light 8 during operation. A first phosphor element 5 is disposed downstream of the second LED light source 7. The first phosphor element 5 is configured to convert the second blue LED light 8 at least partially and optionally completely into a second red converted light 9. In other words, the second LED light source 7 is arranged to pump the first phosphor element 5 such that the second blue LED light is converted into the second red converted light 9.

[0079] A first dichroic mirror 10 is disposed between the first LED light source 3 and the second LED light source 7. More specifically, the first dichroic mirror 10 is disposed between the first phosphor element 5 and the second LED light source 7. The first dichroic mirror 10 is configured to combine the first red converted light 6 and the second red converted light 9. The first dichroic mirror 10 is transparent to the second blue LED light 8 and reflective to the first red converted light 6 and the second red converted light 9. Alternatively, the first dichroic mirror 10 is reflective to the second blue LED light 8 and transparent to the first red converted light 6 and the second red converted light 9.

[0080] The third LED light source 11 is configured to emit a third blue LED light 12 when in operation.

[0081] The fourth LED light source 13 is configured to emit a fourth blue LED light 14 during operation (see...). Figures 6-13 The fourth LED light source 13 may be at least partially and optionally completely covered by the second phosphor element 15. The second phosphor element 15 is arranged downstream of the fourth LED light source 13. The second phosphor element 15 is configured to at least partially and optionally completely convert the fourth blue LED light 14 into the first green converted light 16. The second phosphor element 51 comprises A3B5O. 12 Ce-type phosphor, wherein A in the 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 the embodiments comprises one or more of Al, Ga, In and Sc.

[0082] One or more second dichroic mirrors 171, 172 are arranged downstream of the third LED light source 11 and the fourth LED light source 13. More specifically, one or more second dichroic mirrors 171, 172 are arranged downstream of the third LED light source 11 and the second phosphor element 15. Figure 1 In the illustrated embodiment, two second dichroic mirrors 171 and 172 are provided. Figure 1In the illustrated embodiment, the two second dichroic mirrors 171 and 172 are arranged in the same position and oriented at a 90-degree angle to each other. The two second dichroic mirrors 171 and 172 are transparent to the third blue LED light 12 and reflective to the first green converted light 16. Alternatively, the two second dichroic mirrors 171 and 172 are reflective to the third blue LED light 12 and transparent to the first green converted light 16. Figure 1 In the illustrated embodiment, two second dichroic mirrors 171 and 172 are arranged downstream of the first dichroic mirror 10. Furthermore, in Figure 1 In the embodiment shown, two second dichroic mirrors 171 and 172 are configured to combine the third blue LED light 12, the first green conversion light 16, and the combined first red conversion light 6 and second red conversion light 9.

[0083] Therefore, generally, regardless of the specific embodiment, the first dichroic mirror 10 and one or more second dichroic mirrors 17, 171, 172 are configured to combine the first red conversion light 6, the second red conversion light 9, the third blue LED light 12 and the first green conversion light 16 to form the system light 2.

[0084] Therefore, in Figure 1 In the illustrated embodiment, system light 2 includes a first red conversion light 6, a second red conversion light 9, a third blue LED light 12, and a first green conversion light 16. Typically, regardless of the specific embodiment, system light 2 is white light with a correlated color temperature in the range of 2000K to 9000K and a color rendering index of at least 70.

[0085] The light generating system 1 may also include one or more optional optical devices or optical collimators 18-21. The one or more optical devices 18-21 may be lenses.

[0086] A first optical element 18 may be arranged downstream of the first phosphor element 5 and upstream of the first dichroic mirror 10. The first optical element 18 is configured to collimate the first red conversion light 6 and the second red conversion light 9. A second optical element 19 may be arranged downstream of the second LED light source 7. The second optical element 19 is configured to collimate the second blue LED light 8. A third optical element 20 may be arranged downstream of the third LED light source 11. The third optical element is configured to collimate the third blue LED light 12. A fourth optical element 21 may be arranged downstream of the second phosphor element 15. The second optical element is configured to collimate the first green conversion light 16.

[0087] Typically, regardless of the specific embodiment, the light generating system 1 may also include an optional controller 42. The controller 42 is configured to individually control one or more LED light sources of the light generating system 1. For example, the controller 42 is configured to change one or more of the system light intensity, color rendering index, and correlated color temperature (e.g., differing by at least 500K or at least 1000K). The controller can be connected to the LED light sources via a wired or wireless connection. The controller 42 is configured to individually control a first LED light source 3, a second LED light source 7, a third LED light source 11, a fourth LED light source 13, and (if provided) a fifth LED light source 22, and (if provided) a sixth LED light source 25, (if provided) a seventh LED light source 29, (if provided) an eighth LED light source 35, and (if provided) a ninth LED light source 39.

[0088] Now for reference Figure 2 The figure shows a schematic diagram of another light generating system 100 according to the present invention. The light generating system 100 is the same as described above. Figure 1 The light-generating system 1 described is distinguished by the following features.

[0089] The light generating system 100 includes a fifth LED light source 22. The fifth LED light source 22 is configured to emit a first red LED light 23 during operation. The peak emission wavelength λ5 of the first red LED light 23 is larger than the peak emission wavelength λ1 of the first red converted light 6, and is particularly larger than λ1 by more than 10 nm, and is larger than the peak emission wavelength λ2 of the second red converted light 9, and is particularly larger than λ2 by more than 10 nm. See also... Figure 14 The three peak emission wavelengths λ1, λ2, and λ5 are shown. Alternatively, the peak emission wavelength λ5 of the first red LED light 23 may be smaller than the peak emission wavelength λ1 of the first red converted light 6, and especially smaller than λ1 by more than 10 nm, and smaller than the peak emission wavelength λ2 of the second red converted light 9, and especially smaller than λ2 by more than 10 nm.

[0090] The first dichroic mirror 10 is also arranged downstream of the fifth LED light source 22. The first dichroic mirror 10 is also transparent to the first red LED light 23 and reflective to the first red converted light 6 and the second red converted light 9. Alternatively, the first dichroic mirror 10 is also reflective to the first red LED light 23 and transparent to the first red converted light 6 and the second red converted light 9.

[0091] In addition, two second dichroic mirrors 171 and 172 are provided. These two second dichroic mirrors 171 and 172 are also arranged downstream of the fifth LED light source 22. These two second dichroic mirrors 171 and 172 can also be reflective to the first red LED light 23. Alternatively, these two second dichroic mirrors 171 and 172 can also be transparent to the first red LED light 23. Furthermore, in Figure 2 In the embodiment shown, the two second dichroic mirrors 171 and 172 are configured to combine the third blue LED light 12, the first green conversion light 16, the first red conversion light 6, the second red conversion light 9, and the first red LED light 23.

[0092] Therefore, in this embodiment, the first dichroic mirror 10 and the two second dichroic mirrors 171 and 172 combine the first red conversion light 6, the second red conversion light 9, the third blue LED light 12, the first green conversion light 16 and the first red LED light 23 to form the system light 2.

[0093] Therefore, in Figure 2 In the embodiment shown, the system light 2 includes a first red conversion light 6, a second red conversion light 9, a third blue LED light 12, a first green conversion light 16, and a first red LED light 23.

[0094] The light generating system 100 may also include an optional fifth optics or collimator 24. The fifth optics 24 is arranged downstream of the fifth LED light source 22. The fifth optics 24 is configured to collimate the first red LED light 23. The fifth optics 24 may be a lens.

[0095] Now for reference Figure 3 The figure shows a schematic diagram of another light generating system 101 according to the present invention. The light generating system 101 is the same as described above. Figure 1 and Figure 2 The light generation systems 1 and 100 described differ in the following features.

[0096] The light generation system 101 includes a sixth LED light source 25. The sixth LED light source 25 is configured to emit a fifth blue LED light 26 during operation. A second phosphor element 15 is disposed downstream of the sixth LED light source 25. The second phosphor element 15 is configured to convert the fifth blue LED light 26 at least partially and optionally completely into a second green converted light 17. In other words, the sixth LED light source 25 is arranged to pump the second phosphor element 15 such that the fifth blue LED light 26 is converted into the second green converted light 27.

[0097] exist Figure 3In the illustrated embodiment, only one second dichroic mirror 17 is provided. This second dichroic mirror 17 is also arranged downstream of the sixth LED light source 25. This second dichroic mirror 17 is also transparent to the fifth blue light 26, but reflective to the second green converted light 27. Alternatively, the second dichroic mirror 17 is also reflective to the fifth blue light 26, but transparent to the second green converted light 27.

[0098] Furthermore, the light generating system 101 does not include any fifth LED light source 22, which is configured to emit first red LED light 23 during operation. Nevertheless, it provides a system with a fifth LED light source 22. Figure 3 A light-generating system 101 of the type shown is feasible, wherein a fifth LED light source 22 is configured to emit a first red LED light 23 during operation, as combined with Figure 2 As stated above.

[0099] exist Figure 3 In the illustrated embodiment, the second dichroic mirror 17 is disposed upstream of the first dichroic mirror 10. The second dichroic mirror 17 is configured to combine the first green conversion light 16, the second green conversion light 27, and the third blue LED light 12.

[0100] Therefore, the first dichroic mirror 10 and the second dichroic mirror 17 are configured to combine the first red conversion light 6, the second red conversion light 9, the third blue LED light 12, the first green conversion light 16, and the second green conversion light 27 to form system light 2. If a fifth LED light source 22 is provided, which is configured to emit the first red LED light 23 during operation, the first dichroic mirror 10 and the second dichroic mirror 17 are also configured to combine the first red LED light 23 with the aforementioned lights 6, 9, 12, 16, and 27 to form system light 2.

[0101] The light generation system 101 may also include an optional sixth optics or collimator 28. The sixth optics 28 is arranged downstream of the sixth LED light source 25. The sixth optics is configured to collimate the fifth blue LED light 26. The sixth optics 28 may be a lens. Furthermore, if provided, a fourth optics 21 may also be arranged and configured to collimate the second green converted light 27.

[0102] Now for reference Figure 4 The figure shows a schematic diagram of another light generating system 102 according to the present invention. The light generating system 102 is the same as described above. Figure 1 , Figure 2 and Figure 3 The light-generating systems 1, 100, and 101 are distinguished by the following features.

[0103] The light generating system 102 does not include any fifth LED light source 22, which is configured to emit first red LED light 23 during operation. Nevertheless, a system with a fifth LED light source 22 is provided. Figure 4 A light-generating system 102 of the type shown is feasible, wherein a fifth LED light source 22 is configured to emit a first red LED light 23 during operation, as combined with Figure 2 As stated above.

[0104] In addition, for the sake of simplicity, Figure 4 The third LED light source 11, which is configured to emit a third blue LED light 12 during operation, is not shown in the diagram.

[0105] The light generating system 102 includes a seventh LED light source 29. The seventh LED light source 29 is configured to emit a first violet LED light (not visible in the figure) when in operation. A third phosphor element 31 is disposed downstream of the seventh LED light source 29. The seventh LED light source 29 may be at least partially and optionally completely covered by the third phosphor element 31. The third phosphor element 31 is configured to at least partially and optionally completely convert the first violet LED light into a first blue converted light 32.

[0106] The light generating system 102 also includes an eighth LED light source 35. The eighth LED light source 35 is configured to emit a second violet LED light 36 during operation. A third phosphor element 31 is disposed downstream of the eighth LED light source 35. The third phosphor element 31 is configured to at least partially and optionally completely convert the second violet LED light 36 into a second blue converted light 37. In other words, the eighth LED light source 35 is arranged to pump the third phosphor element 31 such that the second violet LED light 36 is converted into the second blue converted light 37. It should be noted that the eighth LED light source 35 can also be omitted, and is therefore optional.

[0107] The light generating system 102 also includes a third dichroic mirror 33. The third dichroic mirror 33 is disposed downstream of the seventh LED light source 29 and (if provided) downstream of the eighth LED light source 35. The third dichroic mirror 33 is reflective to the first blue converted light 32. If the eighth LED light source 35 is provided, the third dichroic mirror 33 is also transparent to the second violet LED light 36 and reflective to the second blue converted light 37. Alternatively, the third dichroic mirror 33 is transparent to the first blue converted light 32. If the eighth LED light source 35 is provided, the third dichroic mirror 33 is also reflective to the second violet LED light 36 and transparent to the second blue converted light 37.

[0108] exist Figure 4 In the embodiment shown, only a second dichroic mirror 17 is provided. Figure 4 In the illustrated embodiment, the third dichroic mirror 33 is disposed upstream of the first dichroic mirror 10 and the second dichroic mirror 17. The first dichroic mirror 10 and the second dichroic mirror 17 are disposed downstream of the third phosphor element 31. Therefore, the first dichroic mirror 10 and the second dichroic mirror 17 are also transparent to the first blue converted light 32.

[0109] The third dichroic mirror 33 is configured to combine the first blue conversion light 32 and the second blue conversion light 37. If the eighth LED light source 35 is omitted, the third dichroic mirror 33 is simply configured to guide the first blue conversion light 32 to the second dichroic mirror 17.

[0110] exist Figure 4 In the illustrated embodiment, the second dichroic mirror 17 is disposed upstream of the first dichroic mirror 10. The second dichroic mirror 17 is configured to combine the first green conversion light 16, the second green conversion light 27, and the combined first blue conversion light 32 and second blue conversion light 37. If the eighth LED light source 35 is omitted, the second dichroic mirror 17 is configured to combine the first green conversion light 16, the second green conversion light 27, and the first blue conversion light 32.

[0111] The first dichroic mirror 10 is configured to combine the combined first green conversion light 16 and second green conversion light 27, the combined first blue conversion light 32 and second blue conversion light 37, with the combined first red conversion light 6 and second red conversion light 9. If the eighth LED light source 35 is omitted, the second dichroic mirror 17 is configured to combine the combined first and second green conversion lights 16 and first blue conversion light 32 with the combined first red conversion light 6 and second red conversion light 9.

[0112] Therefore, the first dichroic mirror 10, the second dichroic mirror 17 and the third dichroic mirror 33 are configured to combine the first red conversion light 6, the second red conversion light 9, the third blue LED light 12, the first green conversion light 16, the second green conversion light 27, the first blue conversion light 32 and (if an eighth LED light source 35 is provided) the second blue conversion light 37 to form system light 2.

[0113] If a fifth LED light source 22 is provided, which is configured to emit a first red LED light 23 when in operation, then the first dichroic mirror 10, the second dichroic mirror 17, and the third dichroic mirror 33 are also configured to combine the first red LED light 23 with the aforementioned lights 6, 9, 12, 16, 27, 32, and 37 to form system light 2.

[0114] The light generation system 102 may also include an optional seventh optics device or collimator 34. The seventh optics device 34 is arranged downstream of the third phosphor element 31 and upstream of the third dichroic mirror 33. The seventh optics device 34 is configured to collimate the first blue converted light 32. The seventh optics device 34 may be a lens.

[0115] The light generation system 102 may also include an optional eighth optics or collimator 38. The eighth optics 38 may be arranged downstream of the eighth LED light source 35. The eighth optics 38 is configured to collimate the second violet LED light 36. The eighth optics 38 may be a lens. If a seventh optics 34 is provided, it may also be arranged and configured to collimate the second blue converted light 37.

[0116] Now for reference Figure 5 The figure shows a schematic diagram of another light generating system 103 according to the present invention. The light generating system 103 and... Figure 4 The light generation system 102 shown is very similar, but differs in the following features.

[0117] The light generating system 103 does not include any fifth LED light source 22, which is configured to emit first red LED light 23 during operation. However, providing as Figure 5 An LED light generating system 103 of the type shown is feasible, wherein a fifth LED light source 22 is configured to emit a first red LED light 23 during operation, as combined with Figure 2 As stated above.

[0118] In addition, for the sake of simplicity, Figure 5 The third LED light source 11, which is configured to emit a third blue LED light 12 during operation, is not shown in the diagram.

[0119] The light generating system 103 also includes a ninth LED light source 39. This ninth LED light source 39 is configured to emit a third purple LED light 40 when in operation.

[0120] The ninth LED light source 39 is positioned upstream of the first dichroic mirror 10, the second dichroic mirror 17, and the third dichroic mirror 33. Therefore, the first dichroic mirror 10, the second dichroic mirror 17, and the third dichroic mirror 33 are transparent to the third violet LED light 40.

[0121] A first dichroic mirror 10, a second dichroic mirror 17, and a third dichroic mirror 33 are arranged downstream of the ninth LED light source 39. The first dichroic mirror 10, the second dichroic mirror 17, and the third dichroic mirror 33 are transparent to the third violet light 40. Therefore, the first dichroic mirror 10, the second dichroic mirror 17, and the third dichroic mirror 33 are configured to combine the first red conversion light 6, the second red conversion light 9, the third blue LED light 12, the first green conversion light 16, the second green conversion light 27, the third violet LED light 40, the first blue conversion light 32, the second blue conversion light 37, and (if provided) the first red LED light 23 to form system light 2.

[0122] The light generation system 103 may also include an optional ninth optics or collimator 41. The ninth optics 41 may be positioned downstream of the ninth LED light source 39. The ninth optics 41 is configured to collimate the third violet LED light 40. The ninth optics 41 may be a lens.

[0123] Figures 6-13 Other possible light-generating systems 104-111 according to the present invention are schematically illustrated. It should be noted that, for the sake of simplicity, Figures 6-13 All optional optical components have been omitted.

[0124] Figure 6 The above description is shown Figure 3 The light generating system 104 shown is similar to the light generating system 101. The difference between the light generating system 104 and the light generating system 101 is that it does not include any sixth LED light source 25, and the arrangement and configuration of the first dichroic mirror 10 and the second dichroic mirror 17 are also different.

[0125] exist Figure 6 In the illustrated embodiment, a second dichroic mirror 17 is disposed upstream of a first dichroic mirror 10. The first dichroic mirror 10 is configured to combine a first red converted light 6, a second red converted light 9, and a third blue LED light 12. The second dichroic mirror 17 is configured to reflect the third blue LED light 12 and transmit the first green converted light 16. The second dichroic mirror 17 is configured to combine the first green converted light 16 and the third blue LED light 12.

[0126] Therefore, the first dichroic mirror 10 and the second dichroic mirror 17 are configured to combine the first red conversion light 6, the second red conversion light 9, the third blue LED light 12 and the first green conversion light 16 to form the system light 2.

[0127] Figure 7 The light generating system 105 shown is the same as described above and Figure 3The light generating system 101 shown is very similar. The difference between the light generating system 105 and the light generating system 101 is that it does not include any sixth LED light source 25.

[0128] exist Figure 7 In the illustrated embodiment, a second dichroic mirror 17 is disposed upstream of a first dichroic mirror 10. The second dichroic mirror 17 is configured to combine a first green conversion light 16 and a third blue LED light 12.

[0129] Therefore, the first dichroic mirror 10 and the second dichroic mirror 17 are configured to combine the first red conversion light 6, the second red conversion light 9, the third blue LED light 12 and the first green conversion light 16 to form the system light 2.

[0130] Figure 8 The light generating system 106 shown is the same as described above and in Figure 7 The light generation system 105 shown is very similar, but differs in the following aspects.

[0131] exist Figure 8 In the illustrated embodiment, the second dichroic mirror 17 is disposed downstream of the first dichroic mirror 10. The first dichroic mirror 10 is configured to combine the first red conversion light 6, the second red conversion light 9, and the third blue LED light 12. The second dichroic mirror 17 is configured to reflect the first green conversion light 16.

[0132] Therefore, the first dichroic mirror 10 and the second dichroic mirror 17 are configured to combine the first red conversion light 6, the second red conversion light 9, the third blue LED light 12 and the first green conversion light 16 to form the system light 2.

[0133] Figure 9 The light generating system 107 shown is further described above and in Figure 6 The light generating system 104 shown is very similar to the light generating system 107. The difference between the light generating system 107 and the light generating system 104 lies in the arrangement and configuration of the first dichroic mirror 10 and the second dichroic mirror 17.

[0134] exist Figure 9 In the illustrated embodiment, the second dichroic mirror 17 is disposed downstream of the first dichroic mirror 10. The first dichroic mirror 10 is configured to combine the first red conversion light 6, the second red conversion light 9, and the first green conversion light 16. The second dichroic mirror 17 is configured to reflect the third blue LED light 12 and transmit the first green conversion light 16, the first red conversion light 6, and the second red conversion light 9.

[0135] Therefore, the first dichroic mirror 10 and the second dichroic mirror 17 are configured to combine the first red conversion light 6, the second red conversion light 9, the third blue LED light 12 and the first green conversion light 16 to form the system light 2.

[0136] Figure 10 The light generating system 108 shown is the same as described above and Figure 2 The light generation system 100 shown is very similar to the light generation system 102. The difference between the light generation system 108 and the light generation system 102 is that it does not include any fifth LED light source 22, and the arrangement and configuration of the two second dichroic mirrors 171 and 172 are also different.

[0137] exist Figure 10 In the illustrated embodiment, a second dichroic mirror 171 is disposed downstream of another second dichroic mirror 172. The second dichroic mirror 171 is configured to transmit a first green converted light 16 and reflect a third blue LED light 12. The second dichroic mirror 171 is configured to combine the first green converted light 16 and the third blue LED light 12. The other second dichroic mirror 172 is configured to reflect the combined third blue LED light 12 and the first green converted light 16, and transmit a first red converted light 6 and a second red converted light 9.

[0138] Therefore, the first dichroic mirror 10 and the two second dichroic mirrors 171 and 172 are configured to combine the first red conversion light 6, the second red conversion light 9, the third blue LED light 12 and the first green conversion light 16 to form the system light 2.

[0139] Figure 11 The light generating system 109 shown is the same as described above and Figure 10 The light generating system 108 shown is very similar to the light generating system 109. The difference between the light generating system 109 and the light generating system 108 lies in the configuration of the second dichroic mirror 171.

[0140] exist Figure 11 In the illustrated embodiment, a second dichroic mirror 171 is disposed downstream of another second dichroic mirror 172. The second dichroic mirror 171 is configured to reflect the first green converted light 16 and transmit the third blue LED light 12. The second dichroic mirror 171 is configured to combine the first green converted light 16 and the third blue LED light 12. The other second dichroic mirror 172 is configured to reflect the combined third blue LED light 12 and the first green converted light 16 and transmit the first red converted light 6 and the second red converted light 9.

[0141] Therefore, the first dichroic mirror 10 and the two second dichroic mirrors 171 and 172 are configured to combine the first red conversion light 6, the second red conversion light 9, the third blue LED light 12 and the first green conversion light 16 to form the system light 2.

[0142] Figure 12 The light generating system 110 shown is the same as described above and is respectively in Figure 10 and Figure 11 The light generating systems 108 and 109 shown are very similar. The difference between light generating system 110 and light generating systems 108 and 109 lies in the configuration of the two second dichroic mirrors 171 and 172.

[0143] exist Figure 12 In the illustrated embodiment, a second dichroic mirror 171 is disposed downstream of another second dichroic mirror 172. The second dichroic mirror 171 is configured to reflect the first green converted light 16 and transmit the first red converted light 6 and the second red converted light 9. The second dichroic mirror 171 is configured to combine the first green converted light 16, the first red converted light 6, and the second red converted light 9.

[0144] Another second dichroic mirror 172 is configured to reflect the third blue LED light 12 and transmit the combined first green conversion light 16, first red conversion light 6 and second red conversion light 9.

[0145] Therefore, the first dichroic mirror 10 and the two second dichroic mirrors 171 and 172 are configured to combine the first red conversion light 6, the second red conversion light 9, the third blue LED light 12 and the first green conversion light 16 to form the system light 2.

[0146] at last, Figure 13 It shows the same as described above and Figure 11 The light generating system 110 shown is very similar to the light generating system 111. The difference between the light generating system 111 and the light generating system 110 lies in the arrangement of the two second dichroic mirrors 171 and 172.

[0147] exist Figure 12 In the illustrated embodiment, a second dichroic mirror 171 is arranged upstream of another second dichroic mirror 172. The other second dichroic mirror 172 is configured to reflect the third blue LED light 12 and transmit the combined first red converted light 6 and second red converted light 9.

[0148] The second dichroic mirror 171 is configured to reflect the first green conversion light 16 and transmit the combined third blue LED light 12, the first red conversion light 6, and the second red conversion light 9.

[0149] Therefore, the first dichroic mirror 10 and the two second dichroic mirrors 171 and 172 are configured to combine the first red conversion light 6, the second red conversion light 9, the third blue LED light 12 and the first green conversion light 16 to form the system light 2.

[0150] Now for reference Figures 14 to 15 Different suitable phosphor elements of the light generation system 1, 100-111 according to the present invention will be described.

[0151] Garnet

[0152] Garnet phosphors are typically well-suited for use as second phosphor elements. Garnet phosphors are typically A3B5O. 12 Ce-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. In particular, A may comprise one or more of Y, Gd, and Lu, for example, particularly one or more of Y and Lu. In particular, B may comprise one or more of Al and Ga, more specifically, at least Al, such as almost entirely Al. Therefore, cerium-containing garnet materials are particularly suitable luminescent materials. Examples of garnet particularly include A3B5O. 12 Garnet, wherein A contains at least yttrium or lutetium, and wherein B contains at least aluminum. Such garnets may be doped with cerium (Ce), praseodymium (Pr), or a combination of cerium and praseodymium; however, cerium doping is particularly preferred. Specifically, B may contain aluminum (Al); however, in addition to aluminum, B may also partially contain gallium (Ga) and / or scandium (Sc) and / or indium (In), particularly up to about 20% B, more specifically up to about 10% B (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 contain 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 comprises , 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%, especially 0.1% to 2%. Assuming the content of Ce is 1% and the content of Y is 10%, the complete correct chemical formula is: As is known to those skilled in the art, Ce in garnet exists primarily or exclusively in the trivalent state.

[0153] Figure 15A graph showing the intensity (in arbitrary units) of a suitable garnet phosphor (i.e., lutetium aluminum garnet (LuAG) phosphor) as a function of emission wavelength (dashed line, Em) and excitation wavelength (solid line, Ex) is presented. LuAG phosphors offer performance comparable to YAG phosphor elements. The dominant emission wavelength range of LuAG phosphors is 520 nm to 540 nm. LuAG phosphors are typically used in conjunction with red phosphor elements to achieve high CRI full-spectrum coverage. LuAG phosphors can be effectively excited by 450 nm blue LEDs with emission peak wavelengths in the 510–540 nm range. Combined with nitride red phosphors, high CRI spectra with Ra greater than 95 can be obtained. LuAG phosphors are particularly suitable as secondary photocell elements.15

[0154] KSiF type

[0155] Typically, KSiF phosphors are particularly suitable for use as the first phosphor element. KSiF phosphors are doped with tetravalent manganese. The luminescent material comprises an alkaline earth cation, M comprises a basic cation, and x ranges from 0 to 1, wherein A comprises a tetravalent cation, such as one or more of silicon and / or titanium, and X comprises a monovalent anion containing at least fluorine.

[0156] The relevant basic cation (M) is sodium (Na), potassium (K), and rubidium (Rb). Alternatively, lithium and / or cesium may also be used. In a preferred embodiment, M comprises at least potassium. In another embodiment, M comprises at least rubidium. The phrase "wherein M comprises at least potassium" indicates, for example, that in 1 mole... Of all the M cations, a portion contain K. + Optionally, the remainder comprises one or more other monovalent (basic) cations (see below). In another preferred embodiment, M comprises at least potassium and rubidium. Optionally, The luminescent material has a hexagonal phase. In another embodiment, The luminescent material has a cubic phase. When x=0, its composition is... .

[0157] The relevant alkaline earth cations (M') are magnesium (Mg), strontium (Sr), calcium (Ca) and barium (Ba), especially one or more of Sr and Ba.

[0158] The term "tetravalent manganese" refers to Mn 4+ This is a well-known luminescent ion. As shown in the chemical formula above, some tetravalent cation A (such as Si) is replaced by manganese. Therefore, doped with tetravalent manganese It can also be expressed as The molar percentage of manganese, i.e., the percentage by which it replaces the tetravalent cation A, is typically in the range of 0.1% to 15%, especially in the range of 1% to 12%, i.e., m is in the range of 0.001 to 0.15, especially in the range of 0.01 to 0.12.

[0159] As stated above, X involves a monovalent anion, but it contains at least fluorine. Other alternative monovalent anions may be the group consisting of chlorine (Cl), bromine (Br), and iodine (I).

[0160] In one embodiment, Include (Also referred to herein as the KSiF system). As described above, in another preferred embodiment, Include (Also referred to in this article as the K,Rb system). As mentioned above, some silicon is replaced by manganese (i.e., the chemical formula can also be described as...). or Where m is as described above, or respectively described as and Because manganese replaces some of the main lattice ions and has specific functions, it is also called a "dopant" or "activator." Therefore, hexafluorosilicates are substituted by manganese (Mn) 4+ Doping or activation.

[0161] In a specific embodiment, the luminescent material may comprise (K,Rb)₂SiF₆:Mn 4+ Alternatively or additionally, in embodiments, the third luminescent material may include K2SiF6:Mn 4+ Alternatively or additionally, in embodiments, the third luminescent material may comprise K2TiF6:Mn 4+ In an embodiment, the third luminescent material may comprise K2(Si,Ti)F6:Mn 4+ As can be seen above, "Si,Ti" can represent one or more of Si and / or Ti.

[0162] Figure 14 The graph shows the intensity (in arbitrary units) of KSiF phosphor as a function of emission wavelength (dashed line, Em) and excitation wavelength (solid line, Ex). KSiF phosphors can be effectively excited by 460nm blue LEDs, with a strongest emission peak wavelength close to 631nm, a full width at half maximum (FWHM) of less than 60nm, and high color purity. When combined with β-SiO2 green phosphor elements for backlighting, NTSC can be increased to over 100%. KSiF phosphors are particularly suitable for use as the first phosphor element.

[0163] BOSE class

[0164] BOSE phosphors are phosphors that include europium-doped alkaline earth orthosilicates, or more broadly, orthosilicate phosphors.

[0165] BOSE phosphors are particularly suitable for use as third phosphor elements 31.

[0166] Those skilled in the art will understand that the present invention is not limited to the preferred embodiments described above. Rather, many modifications and variations can be made within the scope of the appended claims.

[0167] Furthermore, those skilled in the art can understand and implement various modifications to the disclosed embodiments by studying the accompanying drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite articles "a" or "an" do not exclude multiple elements or steps. The fact that certain measures are described in mutually different dependent claims does not mean that these measures cannot be combined to achieve an advantageous purpose.

Claims

1. A light generating system (1) configured to emit system light (2) during operation, the light generating system comprising: The first LED light source (3) is configured to emit a first blue LED light (4) when in operation. A first phosphor element (5) is disposed downstream of the first LED light source and is configured to convert the first blue LED light (4) at least partially into a first red converted light (6). The second LED light source (7) is configured to emit a second blue LED light (8) when in operation, wherein the first phosphor element is disposed downstream of the second LED light source (7), and wherein the first phosphor element is further configured to convert the second blue LED light at least partially into a second red converted light (9). A first dichroic mirror (10) is disposed between the first phosphor element (5) and the second LED light source (7) and is configured to combine the first red conversion light (6) and the second red conversion light (9), wherein the first dichroic mirror (10) is transparent to the second blue LED light (8) and reflective to the first red conversion light (6) and the second red conversion light (9); or wherein the first dichroic mirror (10) is reflective to the second blue LED light (8) and transparent to the first red conversion light (6) and the second red conversion light (9). The third LED light source (11) is configured to emit a third blue LED light (12) when in operation. The fourth LED light source (13) is configured to emit a fourth blue LED light (14) when in operation. The second phosphor element (15) is disposed downstream of the fourth LED light source and is configured to convert the fourth blue LED light (14) at least partially into the first green conversion light (16). A fifth LED light source (22) is configured to emit a first red LED light (23) during operation, wherein the peak emission wavelength (λ5) of the first red LED light is at least 10 nm larger or at least 10 nm smaller than the peak emission wavelengths (λ1, λ2) of the first red converted light (6) and the second red converted light (9), and One or more second dichroic mirrors (17; 171, 172) are arranged downstream of the third LED light source (11) and the second phosphor element (15), wherein the one or more second dichroic mirrors (17; 171, 172) are transparent to the third blue LED light (12) and reflective to the first green converted light (16); or wherein the one or more second dichroic mirrors (17; 171, 172) are reflective to the third blue LED light (12) and transparent to the first green converted light (16), wherein The first dichroic mirror (10) and the one or more second dichroic mirrors (17; 171, 172) are configured to combine the following to form the system light (2): - The first red conversion light (6). - The second red conversion light (9). - The third blue LED light (12), and - The first green conversion light (16). - The first red LED light (23), and The system light is white light, which has a correlated color temperature in the range of 2000K to 9000K and a color rendering index of at least 70.

2. The light generating system according to any one of the preceding claims, further comprising: The first optical element (18) is arranged downstream of the first phosphor element (5) and upstream of the first dichroic mirror (10), and is configured to collimate the first red conversion light (6) and the second red conversion light (9). The second optical element (19) is arranged downstream of the second LED light source (7) and is configured to collimate the second blue LED light (8). A third optical element (20) is arranged downstream of the third LED light source (11) and is configured to collimate the third blue LED light (12). as well as A fourth optical element (21) is arranged downstream of the second phosphor element (15) and is configured to collimate the first green conversion light (16).

3. The light generating system according to any one of the preceding claims, wherein: The first dichroic mirror (10) is also arranged downstream of the fifth LED light source (22), wherein the first dichroic mirror (10) is also transparent to the first red LED light (23), but reflective to the first red converted light (6) and the second red converted light (9); or wherein the first dichroic mirror (10) is also reflective to the first red LED light (23), but transparent to the first red converted light (6) and the second red converted light (9), and wherein The one or more second dichroic mirrors (17; 171, 172) are also arranged downstream of the fifth LED light source (22) and are either reflective to the first red LED light (23) or transparent to the first red LED light (23).

4. The light generating system according to claim 3, further comprising a fifth optical element (24) arranged downstream of the fifth LED light source (22) and configured to collimate the first red LED light (23).

5. The light generating system according to any one of the preceding claims, further comprising: A sixth LED light source (25) is configured to emit a fifth blue LED light (26) during operation, wherein a second phosphor element (15) is disposed downstream of the sixth LED light source (25), and wherein the second phosphor element is further configured to at least partially convert the fifth blue LED light (26) into a second green converted light (27), wherein The one or more second dichroic mirrors (17; 171, 172) are also arranged downstream of the sixth LED light source (25), and wherein the one or more second dichroic mirrors (17; 171, 172) are also transparent to the fifth blue light (26) and reflective to the second green converted light (27), or wherein the one or more second dichroic mirrors (17; 171, 172) are also reflective to the fifth blue light (26) and transparent to the second green converted light (27), wherein The first dichroic mirror (10) and the one or more second dichroic mirrors (17; 171, 172) are configured to combine the following to form the system light (2): - The first red conversion light (6). - The second red conversion light (9). - The third blue LED light (12). - The first green conversion light (16). - The second green conversion light (27), and - The first red LED light (23) provided when the first red LED light (23) is provided.

6. The light-generating system according to claim 5, which is dependent on any one of claims 2 to 4, wherein the following apply: The LED light generating system further includes a sixth optical element (28), which is arranged downstream of the sixth LED light source (25) and configured to collimate the fifth blue LED light (26). The fourth optical element (21) is also configured to collimate the second green conversion light (27).

7. The light generating system according to any one of the preceding claims, further comprising: The seventh LED light source (29) is configured to emit the first purple LED light when in operation. A third phosphor element (31) is disposed downstream of the seventh LED light source and configured to at least partially convert the first purple LED light into first blue converted light (32), and A third dichroic mirror (33) is disposed downstream of the seventh LED light source (29). The third dichroic mirror (33) is reflective of the first blue converted light (32), or the third dichroic mirror (33) is transparent to the first blue converted light (32). The first dichroic mirror (10) and the one or more second dichroic mirrors (17; 171, 172) are also arranged downstream of the third phosphor element (31) and are also transparent to the first blue converted light (32), wherein The first dichroic mirror (10), the one or more second dichroic mirrors (17; 171, 172) and the third dichroic mirror (33) are configured to combine the following to form the system light (2): - The first red conversion light (6). - The second red conversion light (9). - The third blue LED light (12). - The first green conversion light (16). - The first blue conversion light (32). - The second green conversion light (27) provided when the second green conversion light (27) is provided, and - The first red LED light (23) provided when the first red LED light (23) is provided.

8. The light generating system according to claim 7 further includes a seventh optical element (34) arranged downstream of the third phosphor element (31) and upstream of the third dichroic mirror (33), and configured to collimate the first blue converted light (32).

9. The light generating system according to claim 7 or 8, further comprising: An eighth LED light source (35) is configured to emit a second violet LED light (36) during operation, wherein a third phosphor element (31) is disposed downstream of the eighth LED light source (35), and wherein the third phosphor element (31) is further configured to at least partially convert the second violet LED light (36) into a second blue converted light (37), wherein The third dichroic mirror (33) is also arranged downstream of the eighth LED light source (35), and wherein the third dichroic mirror (33) is transparent to the second violet LED light (36) and reflective to the second blue converted light (37), or wherein the third dichroic mirror (33) is reflective to the second violet LED light (36) and transparent to the second blue converted light (37), wherein The first dichroic mirror (10), the one or more second dichroic mirrors (17; 171, 172) and the third dichroic mirror (33) are configured to combine the following to form the system light (2): - The first red conversion light (6). - The second red conversion light (9). - The third blue LED light (12). - The first green conversion light (16). - The first blue conversion light (32). - The second blue conversion light (37). - The second green conversion light (27) provided when the second green conversion light (27) is provided, and - The first red LED light (23) provided when the first red LED light (23) is provided.

10. The light generating system according to claims 8 and 9, wherein the following applies: The LED light generating system further includes an eighth optical element (38), which is arranged downstream of the eighth LED light source (35) and configured to collimate the second purple LED light (36). The seventh optical element (34) is also configured to collimate the second blue conversion light (37).

11. The light generating system according to any one of claims 7 to 10, further comprising: The ninth LED light source (39) is configured to emit a third purple LED light (40) during operation, wherein The first dichroic mirror (10), the one or more second dichroic mirrors (17; 171, 172) and the third dichroic mirror (33) are also arranged downstream of the ninth LED light source (39), and are also transparent to the third purple LED light (40), and wherein The first dichroic mirror (10), the one or more second dichroic mirrors (17; 171, 172) and the third dichroic mirror (33) are configured to combine the following to form the system light (2): - The first red conversion light (6). - The second red conversion light (9). - The third blue LED light (12). - The first green conversion light (16). - The third purple LED light (40). - The second green conversion light (27) provided when the second green conversion light (27) is provided. - The first blue conversion light (32) provided when the first blue conversion light (32) is provided. - The second blue conversion light (37) provided when the second blue conversion light (37) is provided, and - The first red LED light (23) provided when the first red LED light (23) is provided.

12. The light-generating system according to any one of the preceding claims, wherein the first phosphor element (5) comprises a phosphor doped with tetravalent manganese. A type of phosphor, wherein M' comprises an alkaline earth cation, wherein M comprises a basic cation, and x is in the range of 0 to 1, wherein A comprises a tetravalent cation, and wherein X comprises a monovalent anion containing at least fluorine (F).

13. The light generating system according to any one of the preceding claims, wherein the second phosphor element (15) comprises A3B5O. 12 Ce-type phosphors, wherein A includes one or more of Y, La, Gd, Tb and Lu, and wherein B includes one or more of Al, Ga, In and Sc.

14. The light generating system according to any one of the preceding claims, wherein the light generating system further comprises a controller (42) configured to control the first LED light source (3), the second LED light source (7), the third LED light source (11) and the fourth LED light source respectively, and to control the fifth LED light source (22) when the fifth LED light source (22) is provided, to control the sixth LED light source (25) when the sixth LED light source (25) is provided, to control the seventh LED light source (29) when the seventh LED light source (29) is provided, to control the eighth LED light source (35) when the eighth LED light source (35) is provided, and to control the ninth LED light source (39) when the ninth LED light source (39) is provided.

15. A lamp or luminaire comprising a light generating system (1) according to any one of the preceding claims.

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