Light source device and lighting equipment

Abstract

The utility model discloses a light source device and lighting equipment. The light source device comprises an exciting light source, a wavelength conversion piece and a light filtering piece. The exciting light source comprises N laser chips, and N paths of laser generated by the N laser chips jointly form exciting light. The wavelength conversion piece is arranged on the light path where the exciting light is located and used for converting part of light in the exciting light into specified fluorescent light, and part of light, not converted by the wavelength conversion piece, in the exciting light is combined with the specified fluorescent light to form illumination light. The light filtering part is arranged on a light path where the illumination light rays are located and used for filtering part of the first target light rays in the illumination light rays so as to increase the proportion of the second target light rays in the illumination light rays; wherein the wavelength of the second target light is greater than that of the first target light. According to the light source device, under the condition that high-power illumination is achieved, the color rendering index of the illumination light can be increased, and therefore the product competitiveness of the illumination equipment provided with the light source device is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical illumination, and more particularly, to a light source device and an illumination device. BACKGROUND

[0002] In the existing laser stage light, if the color rendering index of the illumination light is high to meet the color requirements of the stage light, the power of the illumination light is low, which cannot meet the application scene of high power. Conversely, if the illumination power of the illumination light is high to meet the power requirements of the stage light, the color rendering index of the illumination light is low, which does not meet the spot color requirements of the laser stage light.

[0003] That is, the existing laser stage light has the problem that the color rendering index and the illumination power cannot be considered at the same time. CONTENT OF THE INVENTION

[0004] The present application provides a light source device and an illumination device.

[0005] According to a first aspect of the present application, the present application provides a light source device, which comprises an excitation light source, a wavelength conversion member and a filter member. The excitation light source is used to generate excitation light. The excitation light source comprises N laser chips, each of which is used to generate a laser beam. N laser beams generated by the N laser chips form the excitation light together. N is greater than or equal to 2. The wavelength conversion member is arranged on the light path of the excitation light. The wavelength conversion member is used to convert part of the light in the excitation light into specified fluorescent light. The part of the light in the excitation light that is not converted by the wavelength conversion member is combined with the specified fluorescent light to form illumination light. The filter member is arranged on the light path of the illumination light and is used to filter part of the first target light in the illumination light to increase the proportion of the second target light in the illumination light. The wavelength of the second target light is greater than the wavelength of the first target light.

[0006] In some possible embodiments, the laser is blue laser, the first target light is green light, and the second target light is red light.

[0007] In some possible embodiments, the peak wavelength of the specified fluorescent light is greater than or equal to 540 nm and less than or equal to 546 nm.

[0008] In some possible embodiments, the power density of the specified fluorescent light is greater than or equal to 58 W / nm.

[0009] In some possible embodiments, the filter member is a band-stop filter member, and the filter member is used to filter light with a wavelength greater than or equal to 525 nm and less than or equal to 560 nm.

[0010] In some possible embodiments, the transmittance of the filter is less than 0.95 when the wavelength of the light is greater than or equal to 525 nm and less than or equal to 560 nm; and the transmittance of the filter is greater than or equal to 0.95 when the wavelength of the light is less than 525 nm or the wavelength of the light is greater than 560 nm.

[0011] In some possible embodiments, the light source device further includes a plurality of collecting lenses, which are sequentially arranged in the optical path of the illumination light emitted through the wavelength conversion element; the plurality of collecting lenses include a first collecting lens and a second collecting lens; among the plurality of collecting lenses, the optical path between the first collecting lens and the wavelength conversion element is the shortest, and the optical path between the second collecting lens and the wavelength conversion element is the longest; the filter element is a filter, which is arranged in the optical path of the illumination light between the first collecting lens and the wavelength conversion element; or, the filter is arranged in the optical path of the illumination light between two adjacent collecting lenses; or, the filter is arranged in the optical path of the illumination light emitted through the second collecting lens.

[0012] In some possible embodiments, the light source device further includes a single collecting lens disposed in the optical path of the illumination light emitted via the wavelength conversion element; the filter element is a filter disposed in the optical path of the illumination light between the collecting lens and the wavelength conversion element; or, the filter is disposed in the optical path of the illumination light emitted via the collecting lens.

[0013] In some possible embodiments, the light source device further includes a collecting lens, which is disposed in the optical path of the illumination light emitted through the wavelength conversion element; the filter element is a filter film, which is deposited on the light-incident surface or light-outceasing surface of the collecting lens.

[0014] In some possible embodiments, the excitation light source includes a laser unit and a homogenizing unit; the laser unit includes a substrate and N laser chips, the N laser chips being packaged on the substrate; the homogenizing unit is disposed in the optical path of the excitation light, and the excitation light is homogenized by the homogenizing unit before being incident on the wavelength conversion device.

[0015] In some possible embodiments, the light homogenizing unit includes a diffuser and a light homogenizing element, which are sequentially arranged in the optical path where the excitation light is located.

[0016] In some possible embodiments, the light homogenizing unit further includes a first aspherical lens group and a second aspherical lens group; the first aspherical lens group is disposed on the optical path of the excitation light between the laser unit and the diffuser; the second aspherical lens group is disposed on the optical path of the excitation light between the light homogenizer and the wavelength conversion device.

[0017] According to a second aspect of this application, an embodiment of this application also provides a lighting device, which includes a housing and the aforementioned light source device, wherein the light source device is disposed within the housing.

[0018] This application provides a light source device and an illumination device. The light source device includes an excitation light source, a wavelength conversion element, and a filter element. The excitation light source includes N laser chips, each laser chip generating one laser beam. The N laser beams generated by the N laser chips together form the excitation light, where N is greater than or equal to 2. For example, N can be 2, 3, 5, 8, etc., to increase the overall power of the excitation light, enabling the illumination device equipped with this light source device to be used in high-power lighting scenarios. The wavelength conversion element converts a portion of the excitation light into a specified fluorescence. The portion of the excitation light not converted by the wavelength conversion element combines with the specified fluorescence to form illumination light. The filter element is disposed in the optical path of the illumination light to filter a portion of the first target light in the illumination light, thereby increasing the proportion of the second target light in the illumination light; wherein the wavelength of the second target light is greater than the wavelength of the first target light. For example, the first target light can be green light in the illumination light, and the second target light can be red light in the illumination light. It is easy to understand that by reducing the green light component in the illumination light, the proportion of the red light component in the illumination light can be increased, thereby improving the color rendering index of the illumination light.

[0019] In summary, the light source device of this application can improve the color rendering index of the lighting light while achieving high-power lighting, thereby ensuring the competitiveness of lighting equipment equipped with the light source device. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the lighting device provided in the embodiments of this application.

[0022] Figure 2 yes Figure 1 The diagram shows the structure of the light source device in the lighting equipment shown.

[0023] Figure 3 yes Figure 2 A schematic diagram of the uniform light unit in the light source device shown.

[0024] Figure 4 These are emission spectrum curves of different phosphors provided in the embodiments of this application.

[0025] Figure 5 This is a transmittance curve of the filter element provided in the embodiments of this application.

[0026] Figure 6 This is a spectral curve of the illumination light before and after the filter is set, provided in an embodiment of this application.

[0027] Figure 7 yes Figure 2 A schematic diagram showing one possible placement of the filter element in the light source device.

[0028] Figure 8 yes Figure 2 A schematic diagram showing another possible arrangement of the filter element in the light source device. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.

[0030] This application provides a light source device 100 and a lighting device 200 configured with the light source device 100. The lighting device 200 refers to a device that uses lasers for illumination. For example, the lighting device 200 can be a laser stage light, a laser flashlight, a laser projector, etc.

[0031] Please see Figure 1 The lighting device 200 may include a housing 210 and a light source device 100, the light source device 100 being disposed within the housing 210. The housing 210 provides installation space for accommodating the light source device 100 and serves to fix and protect the light source device 100. The light source device 100 generates illumination light B, and the housing 210 may also be provided with a light outlet 2120 to allow the illumination light B to be emitted to the outside through the light outlet 2120.

[0032] Please see Figure 2The light source device 100 may include an excitation light source 30, a wavelength conversion element 40, and a filter element 50. The excitation light source 30 generates excitation light J and may include N laser chips 3210, each laser chip 3210 generating a single laser L. The N lasers L generated by the N laser chips 3210 together form the excitation light J, where N is greater than or equal to 2. For example, N can be 2, 3, 5, 8, etc., to increase the overall power of the excitation light J, enabling the lighting device 200 equipped with this light source device 100 to be used in high-power lighting scenarios. The wavelength conversion element 40 is disposed in the optical path of the excitation light J. The wavelength conversion element 40 converts a portion of the light in the excitation light J into a specified fluorescence F. The portion of the light in the excitation light J that is not converted by the wavelength conversion element 40 combines with the specified fluorescence F to form the illumination light B.

[0033] A filter 50 is disposed in the optical path of the illumination light B. It filters a portion of the first target light in the illumination light B to increase the proportion of the second target light in the illumination light B; wherein the wavelength of the second target light is greater than the wavelength of the first target light. For example, the first target light can be green light in the illumination light B, and the second target light can be red light in the illumination light B. It is easy to understand that by reducing the green light component in the illumination light B, the proportion of the red light component in the illumination light B can be increased, thereby improving the color rendering index of the illumination light B.

[0034] In summary, the light source device 100 of this application can improve the color rendering index of the lighting light B while achieving high-power lighting, thereby ensuring the product competitiveness of the lighting equipment 200 equipped with the light source device 100.

[0035] The specific implementation of the light source device 100 is described below.

[0036] In this embodiment, the excitation light source 30 may include a laser unit 320 and a homogenizing unit 340. The laser unit 320 is used to generate excitation light J as the excitation light for exciting a specified fluorescence F.

[0037] In some possible embodiments, the laser unit 320 may include a substrate (not shown) and N laser chips 3210, which are packaged on the substrate. Each laser chip 3210 is used to generate one laser beam L. As one implementation, the laser L may be a blue laser. Specifically, the substrate may be made of a material with good thermal conductivity (e.g., a metal material), which can effectively dissipate heat from the N laser chips 3210 to ensure the operating efficiency of the laser chips 3210. For example, N can be 2, 3, 5, 8, etc. Figure 2 In the example shown, N is 3.

[0038] In one implementation, the N laser chips 3210 can be packaged on the substrate in a 1*N array. That is, in this embodiment, the laser unit 320 is a 1*N laser chip array to improve the overall power of the excitation light J.

[0039] In some possible embodiments, the N laser chips 3210 can be mounted on the substrate using surface mount device (SMD) technology to improve the integration of the laser unit 320. In other possible embodiments, the N laser chips 3210 can also be fixed on the substrate using a transistor outline (TO) package; this embodiment does not limit this approach.

[0040] A homogenizing unit 340 is disposed in the optical path of the excitation light J. The excitation light J is homogenized by the homogenizing unit 340 and then incident on the wavelength conversion unit 40. The homogenizing unit 340 is used to homogenize the excitation light J to improve the uniformity of the light spot.

[0041] Please see Figure 3 The light-diffusing unit 340 may include a diffuser 3410 and a light-diffusing element 3430, which are sequentially disposed in the optical path of the excitation light J. The diffuser 3410 diffuses the excitation light J to eliminate speckle in the excitation light J and improve the light quality of the excitation light J. Specifically, the diffuser 3410 may be a diffuser sheet. The light-diffusing element 3430 homogenizes the excitation light J so that the light intensity distribution of the excitation light J after homogenization by the light-diffusing element 3430 is uniform, thus meeting the lighting scene requiring uniform illumination. Specifically, the light-diffusing element 3430 may be a compound eye, a light-diffusing rod, etc. This embodiment does not limit the implementation of the diffuser 3410 and the light-diffusing element 3430.

[0042] In some possible embodiments, the homogenizing unit 340 may further include a first aspherical lens group 3450 and a second aspherical lens group 3470. The first aspherical lens group 3450 is disposed in the optical path of the excitation light J between the laser unit 320 and the diffuser 3410. It is used to converge and collect the excitation light J emitted from the laser unit 320 before it is incident on the diffuser 3410, thereby improving the energy utilization efficiency of the excitation light J. Furthermore, the excitation light J emitted from the laser unit 320, converged by the first aspherical lens group 3450, can reduce its overall spot size, allowing the diffuser 3410 and homogenizing unit 3430 in the subsequent optical path to have smaller hardware dimensions, thus reducing the hardware cost of the light source device 100. Specifically, the first aspherical lens group 3450 may include one or more aspherical lenses, which may be plano-convex lenses, biconvex lenses, etc., and this embodiment does not limit this.

[0043] The second aspherical lens group 3470 is disposed in the optical path of the excitation light J between the homogenizer 3430 and the wavelength conversion element 40. It is used to converge and collect the excitation light J emitted from the homogenizer 3430 before it is incident on the wavelength conversion element 40, thereby improving the energy utilization efficiency of the excitation light J. Furthermore, the excitation light J emitted from the homogenizer 3430, converged by the second aspherical lens group 3470, can have a smaller overall spot size, allowing the wavelength conversion element 40 in the subsequent optical path to have a smaller hardware size, thus reducing the hardware cost of the light source device 100. Specifically, the second aspherical lens group 3470 may include one or more aspherical lenses, which may be plano-convex lenses, biconvex lenses, etc., and this embodiment does not limit this.

[0044] In this embodiment, the wavelength conversion element 40 is disposed in the optical path of the excitation light J. The wavelength conversion element 40 is used to convert a portion of the light in the excitation light J into a designated fluorescence F. The portion of the light in the excitation light J that is not converted by the wavelength conversion element 40 combines with the designated fluorescence F to form the illumination light B. Figure 2 In the illustrated embodiment, the wavelength conversion element 40 can be a transmission-type wavelength conversion element, where another portion of the excitation light J (i.e., the portion of the light not converted by the wavelength conversion element 40) is transmitted through the wavelength conversion element 40 and then combined with the designated fluorescence F. In some other possible embodiments, the wavelength conversion element 40 can be a reflection-type wavelength conversion element, where another portion of the excitation light J (i.e., the portion of the light not converted by the wavelength conversion element 40) is reflected by the wavelength conversion element 40 and then combined with the designated fluorescence F.

[0045] Specifically, the wavelength conversion element 40 can be a phosphor sheet mixed with phosphor. In some possible embodiments, the peak wavelength of the phosphor can be greater than or equal to 540 nm and less than or equal to 546 nm, so that the peak wavelength of the specified fluorescence F is also greater than or equal to 540 nm and less than or equal to 546 nm. For example, the peak wavelength can be 540 nm, 542 nm, 543 nm, 546 nm, etc. Therefore, compared with the wavelength conversion element used for a specified fluorescence that is yellowish-green (e.g., the peak wavelength of the specified fluorescence is 549 nm), the specified fluorescence in this application is greenish and has a shorter wavelength, which allows the wavelength conversion element to withstand higher power density excitation light to meet high-power application scenarios.

[0046] It should be noted that in related technologies, in order to ensure that the illumination light B is white light, the peak wavelength of the phosphor is usually biased towards the band where yellow-green light is located, so as to ensure that there is a sufficient yellow light component in the specified phosphor F. For example, related technologies often use phosphors with a peak wavelength of 549nm, but such phosphors can only tolerate excitation light with low power density, which limits the illumination power of the illumination light B.

[0047] In this application, a phosphor with a shorter peak wavelength is used, such as 542 nm, 543 nm, etc., which enables the phosphor to withstand excitation light with a higher power density, thereby increasing the power density of the specified fluorescence F. Specifically, the power density of the specified fluorescence F can be greater than or equal to 58 W / nm, for example, the power density of the specified fluorescence F can be 60 W / nm, 62 W / nm, 65 W / nm, etc.

[0048] Please see Figure 4 The diagram shows the emission spectrum curves corresponding to different phosphors. The lighter gray curves correspond to the phosphor used in this application, which has a peak wavelength of 543 nm; the darker gray curves correspond to phosphors used in related technologies, which have a peak wavelength of 549 nm. Figure 4 It is not difficult to see that when the wavelength of the emitted light (i.e., fluorescence) is between 470nm and 630nm, the optical power density of the phosphor in this application is greater than that of the phosphor in the related technology, indicating that the phosphor in this application can withstand higher power excitation light.

[0049] In this embodiment, the filter 50 is disposed in the optical path of the illumination light B, and is used to filter a portion of the first target light in the illumination light B to increase the proportion of the second target light in the illumination light B. The wavelength of the second target light is greater than the wavelength of the first target light. In some possible embodiments, the first target light can be green light in the illumination light B, and the second target light can be red light in the illumination light B. It is easy to understand that when the green light component in the illumination light B is reduced, the proportion of the red light component in the illumination light B can be increased to improve the color rendering index of the illumination light B.

[0050] It should be noted that, to ensure the illumination power of illumination ray B, the wavelength conversion element 40 uses phosphors with a peak wavelength greater than or equal to 540nm and less than or equal to 546nm, resulting in a greenish light spot color and a low color rendering index (CRI) for illumination ray B. To address this issue, this application incorporates a filter 50 in the optical path of illumination ray B to filter out a portion of the green light, thereby reducing the green light component in illumination ray B and increasing the proportion of red light, thus improving the CRI of illumination ray B.

[0051] Please refer to Table-1, which shows the optical parameters of the illumination light B before and after setting the filter 50.

[0052] Optical path arrangement Color purity Red color ratio Green light ratio Blue color ratio Ra Without filter 13.8 10.6 86.5 2.9 64.1 With filter 14.4 11 86.1 2.9 65.3

[0053] It is easy to see from Table 1 that when filter 50 is set, the green light ratio decreases, the red light ratio increases, and the color purity and color rendering index (Ra) are both improved.

[0054] In some possible embodiments, the filter 50 is a band-stop filter, used to filter light with wavelengths greater than or equal to 525 nm and less than or equal to 560 nm. That is, in this embodiment, the filter 50 only filters light in the green light band and has almost no effect on light in other bands.

[0055] Please see Figure 5The diagram shows the transmittance curve of the filter 50. Specifically, when the wavelength of light is greater than or equal to 525 nm and less than or equal to 560 nm, the transmittance of the filter 50 is less than 0.95. When the wavelength of light is less than 525 nm or greater than 560 nm, the transmittance of the filter 50 is greater than or equal to 0.95. Therefore, the filter 50 in this embodiment can "block" a portion of light with wavelengths greater than or equal to 525 nm and less than or equal to 560 nm, thereby reducing the green light component in the illumination light B. Furthermore, the filter 50 in this embodiment has almost no effect on light with wavelengths less than 525 nm or greater than 560 nm, ensuring that red and blue light in the illumination light B can be transmitted smoothly.

[0056] Please see Figure 6 It shows the spectral curves of illumination light B before and after the filter 50 is applied. The lighter-gray-level curve corresponds to the spectral curve of illumination light B without the filter 50; the darker-gray-level curve corresponds to the spectral curve of illumination light B with the filter 50 applied. Figure 6 It is not difficult to see that when filter 50 is set, the spectral curve decreases in the wavelength range of 510nm to 600nm, indicating that the green light power density is reduced and the green light component in the illumination light B is reduced.

[0057] Please see Figure 7 The light source device 100 may further include multiple collecting lenses 60, which are sequentially arranged in the optical path of the illumination light B emitted through the wavelength conversion element 40. These collecting lenses 60 are used to converge and collect the illumination light B emitted from the wavelength conversion element 40, thereby improving the energy utilization efficiency of the illumination light B. Furthermore, the multiple collecting lenses 60 can also compress the corresponding light spot of the illumination light B, allowing the illumination light B to be smoothly emitted to the outside. Specifically, the number of collecting lenses 60 can be 2, 3, or 5, and the collecting lenses 60 can be plano-convex lenses, biconvex lenses, etc., which are not limited in this embodiment.

[0058] exist Figure 7 In the illustrated embodiment, the plurality of collecting lenses 60 may include a first collecting lens 610 and a second collecting lens 630. Among the plurality of collecting lenses 60, the first collecting lens 610 has the shortest optical path distance to the wavelength conversion element 40, and the second collecting lens 630 has the longest optical path distance to the wavelength conversion element 40. Here, "optical path distance" can be understood as the propagation distance of the illumination ray B. Specifically, the first collecting lens 610 can be understood as the lens with the shortest distance to the wavelength conversion element 40 among the plurality of collecting lenses 60, and the second collecting lens 630 can be understood as the lens with the longest distance to the wavelength conversion element 40 among the plurality of collecting lenses 60.

[0059] The filter element 50 can be a filter 520, which can be disposed in the optical path of the illumination light B between the first collecting lens 610 and the wavelength conversion element 40. The filter 520 can also be disposed in the optical path of the illumination light B between two adjacent collecting lenses 60. The filter 520 can also be disposed in the optical path of the illumination light B emitted through the second collecting lens 630. This embodiment does not limit the specific placement of the filter 520. Figure 7 In the embodiment shown, the filter 520 is disposed between two adjacent collecting lenses 60.

[0060] In some other possible embodiments, the collecting lens 60 is a single lens, positioned in the optical path of the illumination light B emitted via the wavelength conversion element 40. The filter 520 may be positioned in the optical path of the illumination light B between the collecting lens 60 and the wavelength conversion element 40. The filter 520 may also be positioned in the optical path of the illumination light B emitted via the collecting lens 60; the specific placement of the filter 520 is not limited in this application.

[0061] Please see Figure 8 The light source device 100 may also include a collecting lens 60, which is disposed in the optical path of the illumination light B emitted through the wavelength conversion element 40. Specifically, the number of collecting lenses 60 may be 1, 2, 3, or 5, and the collecting lens 60 may be a plano-convex lens, a biconvex lens, etc., which are not limited in this embodiment.

[0062] exist Figure 8 In the illustrated embodiment, the filter element 50 can be a filter film 540, which can be deposited on the light-incident surface 601 or the light-exit surface 603 of the collecting lens 60 to save installation space for the filter film 540, making the overall structure of the light source device 100 more compact. Specifically... Figure 8 In the embodiment shown, there are multiple collecting lenses 60, and a filter film 540 is deposited on the light-incident surface 601 of one of the collecting lenses 60.

[0063] This application provides a light source device 100 and a lighting device 200 equipped with the light source device 100. The light source device 100 may include an excitation light source 30, a wavelength conversion element 40, and a filter element 50. The excitation light source 30 generates excitation light J and may include N laser chips 3210. Each laser chip 3210 generates one laser L, and the N lasers L generated by the N laser chips 3210 together form the excitation light J, where N is greater than or equal to 2. For example, N can be 2, 3, 5, 8, etc., to increase the overall power of the excitation light J, enabling the lighting device 200 equipped with the light source device 100 to be used in high-power lighting scenarios. The wavelength conversion element 40 is disposed in the optical path of the excitation light J. The wavelength conversion element 40 converts a portion of the light in the excitation light J into a specified fluorescence F. The portion of the light in the excitation light J that is not converted by the wavelength conversion element 40 combines with the specified fluorescence F to form the illumination light B.

[0064] A filter 50 is disposed in the optical path of the illumination light B. It filters a portion of the first target light in the illumination light B to increase the proportion of the second target light in the illumination light B; wherein the wavelength of the second target light is greater than the wavelength of the first target light. For example, the first target light can be green light in the illumination light B, and the second target light can be red light in the illumination light B. It is easy to understand that by reducing the green light component in the illumination light B, the proportion of the red light component in the illumination light B can be increased, thereby improving the color rendering index of the illumination light B.

[0065] In summary, the light source device 100 of this application can improve the color rendering index of the lighting light B while achieving high-power lighting, thereby ensuring the product competitiveness of the lighting equipment 200 equipped with the light source device 100.

[0066] In this application specification, certain terms are used to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. The specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to"; "generally" means that those skilled in the art can solve the technical problem within a certain margin of error and basically achieve the technical effect.

[0067] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "inside", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of simplifying the description of this application and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0068] In this application, unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or merely surface contact. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0069] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0070] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A light source apparatus, characterized by comprising: The light source device comprises: an excitation light source for generating excitation light; wherein the excitation light source comprises N laser chips, each of which is used to generate a laser beam, and N laser beams generated by the N laser chips form the excitation light together, and N is greater than or equal to 2; a wavelength conversion member arranged on an optical path of the excitation light; the wavelength conversion member is used to convert part of the light in the excitation light into specified fluorescent light, and the part of the light in the excitation light which is not converted by the wavelength conversion member is combined with the specified fluorescent light to form illumination light; an optical filter arranged on an optical path of the illumination light, used to filter part of the first target light in the illumination light, so as to increase the proportion of the second target light in the illumination light; wherein the wavelength of the second target light is greater than the wavelength of the first target light.

2. The light source apparatus according to claim 1, wherein The laser is blue laser, the first target light is green light, and the second target light is red light.

3. The light source apparatus according to claim 1, wherein The peak wavelength of the specified fluorescent light is greater than or equal to 540 nm and less than or equal to 546 nm.

4. The light source apparatus according to claim 1, wherein The power density of the specified fluorescent light is greater than or equal to 58 W / nm.

5. The light source apparatus according to claim 1, wherein The optical filter is a band-stop optical filter, and the optical filter is used to filter light with a wavelength greater than or equal to 525 nm and less than or equal to 560 nm.

6. The light source apparatus according to claim 5, wherein In the case that the wavelength of the light is greater than or equal to 525 nm and less than or equal to 560 nm, the transmittance of the optical filter is less than 0.95; In the case that the wavelength of the light is less than 525 nm, or the wavelength of the light is greater than 560 nm, the transmittance of the optical filter is greater than or equal to 0.

95.

7. The light source apparatus according to any one of claims 1 to 6, wherein The light source device further comprises a plurality of collection lenses, and the plurality of collection lenses are arranged on an optical path of the illumination light emitted through the wavelength conversion member in sequence; The plurality of collection lenses comprise a first collection lens and a second collection lens; among the plurality of collection lenses, the optical path between the first collection lens and the wavelength conversion member is the smallest, and the optical path between the second collection lens and the wavelength conversion member is the largest; The optical filter is an optical filter, which is arranged on an optical path of the illumination light between the first collection lens and the wavelength conversion member, or arranged on an optical path of the illumination light between two adjacent collection lenses, or arranged on an optical path of the illumination light emitted through the second collection lens.

8. The light source apparatus according to any one of claims 1 to 6, wherein The light source device further comprises a single collection lens, which is arranged on an optical path of the illumination light emitted through the wavelength conversion member; The optical filter is an optical filter, which is arranged on an optical path of the illumination light between the collection lens and the wavelength conversion member, or arranged on an optical path of the illumination light emitted through the collection lens.

9. The light source apparatus according to any one of claims 1 to 6, wherein The light source device further comprises a collection lens, which is arranged on an optical path of the illumination light emitted through the wavelength conversion member; The optical filter is an optical filter film, which is coated on the light-incident surface or the light-emitting surface of the collection lens.

10. The light source apparatus according to any one of claims 1 to 6, wherein The excitation light source comprises a laser unit and a light homogenizing unit; The laser unit comprises a substrate and N laser chips, and the N laser chips are packaged on the substrate; the light uniformization unit is arranged on an optical path of the excitation light, and the excitation light is incident on the wavelength conversion member after uniformization via the light uniformization unit.

11. The light source apparatus according to claim 10, wherein The light uniformization unit comprises a diffusion member and a light uniformization member, and the diffusion member and the light uniformization member are arranged on the optical path of the excitation light in sequence.

12. The light source apparatus according to claim 11, wherein The light uniformization unit further comprises a first aspherical lens group and a second aspherical lens group. The first aspherical lens group is arranged on the optical path of the excitation light between the laser unit and the diffusion member. The second aspherical lens group is arranged on the optical path of the excitation light between the light uniformization member and the wavelength conversion member.

13. An illumination device, characterized by Comprise: a housing; and The light source device as claimed in any one of claims 1 to 12 is arranged in the housing. ​

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