Light source module and lighting device
By designing a multi-wavelength conversion device structure in the light source module, it avoids direct excitation of the red fluorescent layer from high-power laser, which solves the problem that the red fluorescent layer is prone to thermal quenching under high-power lasers, and improves stability and color rendering index.
Patent Information
- Application Number
- CN202421524140.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-28
AI Technical Summary
Under the irradiation of high-power laser light, the red fluorescent layer is prone to thermal quenching, resulting in stability problems.
A light source module is designed, including a housing, a light source, a first wavelength conversion device and a second wavelength conversion device. The first fluorescence is generated by the first wavelength conversion device, and the red fluorescence layer is excited in the second wavelength conversion device to generate red fluorescence, avoiding direct excitation of the red fluorescence layer.
It improves the application stability of the red fluorescent layer, increases the color rendering index of the emitted light, realizes the output of warm white light, and avoids photothermal damage to the red fluorescent layer.
Smart Images
Figure CN222718067U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of light sources, and in particular to a light source module and a lighting device. Background Art
[0002] White light laser lighting device is a lighting device that uses laser as a light source and converts or mixes lasers of different wavelengths through a fluorescent layer to produce white light.
[0003] Traditional laser lighting devices usually use blue light to excite yellow fluorescent materials to obtain yellow fluorescence, which together with the unabsorbed blue light constitutes white light. In the actual application of laser lighting sources, it is necessary to add a red fluorescent layer with high stability to improve the color rendering index of the lighting device. However, the red fluorescent layer has stability problems during long-term use, and the red fluorescent layer is prone to thermal quenching under high-power laser irradiation. Utility Model Content
[0004] Embodiments of the present application provide a light source module and a lighting device.
[0005] In a first aspect, an embodiment of the present application provides a light source module, including a housing, a light source, a first wavelength conversion device, and a second wavelength conversion device. The housing includes a first encapsulation shell and a second encapsulation shell, and the second encapsulation shell is connected to one side of the first encapsulation shell. The light source is arranged on one side of the housing, and the light source is used to emit excitation light. The first wavelength conversion device is arranged in the first encapsulation shell and is located on the optical path of the excitation light, and is used to generate a first fluorescence under the excitation of part of the excitation light. The second wavelength conversion device is arranged in the second encapsulation shell and is located on the optical path of the first fluorescence, and is used to generate a second fluorescence under the excitation of part of the first fluorescence, the wavelength of the first fluorescence is smaller than the wavelength of the second fluorescence, and the second fluorescence and part of the first fluorescence are mixed to form an emergent light, wherein the second wavelength conversion device includes at least a red fluorescent layer, and the second fluorescence includes at least red fluorescence.
[0006] In some optional embodiments, the first wavelength conversion device includes a first sub-fluorescence layer and / or a second sub-fluorescence layer, and the first sub-fluorescence layer and the second sub-fluorescence layer are excited to generate a first sub-fluorescence and a second sub-fluorescence respectively, and the wavelength of the first sub-fluorescence is different from the wavelength of the second sub-fluorescence, and the wavelength of the first sub-fluorescence and the wavelength of the second sub-fluorescence are both smaller than the wavelength of the red fluorescence.
[0007] In some optional embodiments, the first wavelength conversion device also includes a reflective layer, which is arranged on the inner wall of the first packaging shell, and the first sub-fluorescent layer and / or the second sub-fluorescent layer are arranged on a side of the reflective layer away from the inner wall of the first packaging shell, and the first sub-fluorescent layer and the second sub-fluorescent layer are located in the optical path of the excitation light.
[0008] In some optional embodiments, the excitation light includes ultraviolet laser, the first sub-fluorescence is blue fluorescence, and the second sub-fluorescence is yellow fluorescence or green fluorescence; or, the excitation light includes blue laser, the first sub-fluorescence is yellow fluorescence, and the second sub-fluorescence is green fluorescence.
[0009] In some optional embodiments, the light source module also includes a selection film, the first packaging shell is provided with a first cavity, the second packaging shell is provided with a second cavity, and the first cavity is connected to the second cavity; the selection film is arranged in the shell and separates the first cavity and the second cavity, and the selection film is used to reflect the excitation light and transmit the first fluorescence.
[0010] In some optional embodiments, the first wavelength conversion device is disposed on the inner wall of the first packaging shell, the first packaging shell has a light entrance, and the light entrance is located on the optical path of the excitation light; the first wavelength conversion device is disposed opposite to the light entrance to receive the excitation light incident through the light entrance.
[0011] In some optional embodiments, the first packaging shell also has a first light exit port, a selection film is arranged at the first light exit port to serve as a light exit surface of the first packaging shell, and the second wavelength conversion device is arranged on a side of the selection film away from the first packaging shell, and the first fluorescence in the first cavity is emitted through the light exit surface and then enters the second wavelength conversion device of the second packaging shell.
[0012] In some optional embodiments, the light source module also includes a transflective component, which is arranged in the first packaging shell and is located between the light source and the first wavelength conversion device, and between the light source and the second wavelength conversion device. The transflective component is used to transmit the excitation light and to reflect the first fluorescence to the first light output port.
[0013] In some optional embodiments, the second packaging shell further includes a second light outlet, and the second light outlet is arranged in an outlet direction of the second fluorescent light.
[0014] In a second aspect, an embodiment of the present application further provides a lighting device, comprising the above-mentioned light source module.
[0015] Compared with the prior art, when the light source module provided by the embodiment of the present application is used, the light source emits a laser, the laser propagates to the first wavelength conversion device, the first wavelength conversion device is excited to generate a first fluorescence, the first fluorescence propagates to the second wavelength conversion device, and part of the first fluorescence excites the second wavelength conversion device to generate a second fluorescence. The second fluorescence and part of the first fluorescence are mixed to form the output light. The second wavelength conversion device includes at least a red fluorescence layer, and the second fluorescence includes at least red fluorescence. The red fluorescence increases the color rendering index of the output light. The red fluorescence is generated by the first fluorescence exciting the red fluorescence layer, avoiding the problem of thermal attenuation of the red fluorescence layer directly excited by the laser, and improving the application stability of the red fluorescence layer. The light source module remotely encapsulates the red fluorescence layer through the second packaging shell, away from the light source, avoiding exposure to the excitation light, and making the thermal stability of the red fluorescence more stable. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation manner will be briefly introduced below. Obviously, the drawings described below are only some implementation manners of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0017] Figure 1 This is a module block diagram of a lighting device provided in one embodiment of the present application.
[0018] Figure 2 It is a simplified structural diagram of a light source module provided in one embodiment of the present application.
[0019] Explanation of reference numerals: 100, light source module; 10, light source; 20, cooling device; 30, first wavelength conversion device; 33, first fluorescent layer; 34, first sub-fluorescent layer; 36, second sub-fluorescent layer; 38, reflecting layer; 50, second wavelength conversion device; 60, transflective element; 61, plane mirror; 63, transflective coating; 70, shell; 71, light incident side; 73, light emitting side; 72, first cavity; 74, second cavity; 77, first packaging shell; 772, light incident port; 774, first light outlet port; 776, light outlet surface; 78, second packaging shell; 781, second light outlet port; 80, selection film; 200, lighting device; 201, circuit board. DETAILED DESCRIPTION
[0020] In order 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 in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.
[0021] If certain words are used in the specification and claims to refer to specific components, those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use differences in names as a way to distinguish components, but use differences in components' functions as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to"; "substantially" means that those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.
[0022] See also Figure 1The embodiment of the present application provides a light source module 100 and a lighting device 200. The light source module 100 can be applied to the lighting device 200 to provide lighting with a high color rendering index.
[0023] This specification does not limit the specific type of the lighting device 200. For example, the lighting device 200 can be a stage light, a car light, a searchlight, etc. As an example, the lighting device 200 can include the above-mentioned light source module 100 and a circuit board 201. The circuit board 201 is electrically connected to the light source module 100 and is used to supply energy to the light source module 100.
[0024] See also Figure 2 In some embodiments of the present application, the light source module 100 may include a housing 70, a light source 10, a first wavelength conversion device 30, and a second wavelength conversion device 50. The housing 70 includes a first encapsulation shell 77 and a second encapsulation shell 78, and the second encapsulation shell 78 is connected to one side of the first encapsulation shell 77. The light source 10 is disposed on one side of the housing 70, and the light source 10 is used to emit excitation light P. The first wavelength conversion device 30 is disposed in the first encapsulation shell 77 and is located on the optical path of the excitation light P, and is used to generate a first fluorescence A under the excitation of part of the excitation light P. The second wavelength conversion device 50 is disposed in the second encapsulation shell 78 and is located on the optical path of the first fluorescence A, and is used to generate a second fluorescence B under the excitation of part of the first fluorescence A. The wavelength of the first fluorescence A is smaller than the wavelength of the second fluorescence B, and the second fluorescence B and part of the first fluorescence A are mixed to form an outgoing light. Among them, the second wavelength conversion device 50 includes at least a red fluorescent layer, and the second fluorescence B includes at least red fluorescence.
[0025] When in use, the light source 10 emits an excitation light P, which propagates to the first wavelength conversion device 30, and the first wavelength conversion device 30 is excited to generate a first fluorescence A. The first fluorescence A propagates to the second wavelength conversion device 50, and part of the first fluorescence A excites the second wavelength conversion device 50 to generate a second fluorescence B. The second fluorescence B and part of the first fluorescence A are mixed to form an outgoing light. The second wavelength conversion device 50 includes at least a red fluorescent layer, and the second fluorescence B includes at least red fluorescence. The red fluorescence increases the color rendering index of the outgoing light. As an example, if the first fluorescence A is a yellow-green mixed fluorescence, the addition of red fluorescence can improve the color rendering index of white light. The red fluorescence is generated by the first fluorescence A exciting the red fluorescent layer, which avoids the problem of thermal attenuation of the red fluorescent layer directly excited by the excitation light P, and improves the application stability of the red fluorescent layer, so as to achieve the effect of increasing the proportion of the red luminescent component and achieving the output of warm white light while avoiding the photothermal damage of the red fluorescent layer. In some embodiments of the present application, the light source module 100 remotely encapsulates the red fluorescent layer through the second packaging shell 78 (compared to the remote packaging of the light source 10), away from the laser heat source (light source 10), avoiding ultraviolet laser exposure, and making the thermal stability of the red fluorescence more stable.
[0026] In some embodiments of the present application, the light source 10 is used to emit an excitation light P to excite the first wavelength conversion device 30 to generate the first fluorescence A. This specification does not limit the specific type of the light source 10. For example, the light source 10 may be an LED light source or a laser light source. In some embodiments of the present application, the light source 10 is a laser light source, and the excitation light P may include an ultraviolet laser or a blue laser. Then, the light source 10 may include an ultraviolet laser emitter or a blue laser emitter.
[0027] The present specification does not limit the specific material of the housing 70. For example, the material of the housing 70 may include aluminum alloy, stainless steel, etc. The first encapsulation shell 77 is provided with a first cavity 72, and the second encapsulation shell 78 is provided with a second cavity 74. The first cavity 72 is connected to the second cavity 74. The first wavelength conversion device 30 is located in the first cavity 72, the light source 10 is located on one side of the first encapsulation shell 77, and the second wavelength conversion device 50 is arranged in the second cavity 74. The light source module 100 also includes a selection film 80, which is arranged in the housing 70 and separates the first cavity 72 and the second cavity 74. The selection film 80 is used to reflect the excitation light P and transmit the first fluorescence A.
[0028] The light source module 100 remotely packages the red fluorescent layer through the second packaging shell 78 (compared to the remote packaging of the light source 10), away from the laser heat source (light source 10), avoiding exposure to ultraviolet laser, making the thermal stability of the red fluorescent layer more stable, and finally obtaining white light with uniform fluorescent distribution.
[0029] The present specification does not limit the specific structure of the first encapsulation shell 77. As an example, the first encapsulation shell 77 is roughly in the shape of a rectangular shell. A light inlet 772 is provided at one end of the first encapsulation shell 77. The light source 10 is arranged opposite to the light inlet 772. The light inlet 772 is located on the optical path of the excitation light P. The first encapsulation shell 77 also has a first light outlet 774, which is arranged on the side wall of the first encapsulation shell 77. The second encapsulation shell 78 is connected to the side wall of the first encapsulation shell 77 and communicates with the first encapsulation shell 77 through the first light outlet 774. The selection film 80 is arranged at the first light outlet 774 and serves as the light outlet surface 776 of the first encapsulation shell 77 to separate the first cavity 72 and the second cavity 74. The second wavelength conversion device 50 is arranged on the side of the selection film 80 away from the first encapsulation shell 77. The excitation light P enters the first packaging shell 77 through the light entrance port 772 and excites the first wavelength conversion device 30. The first wavelength conversion device 30 generates a first fluorescence A. The first fluorescence A is transmitted through the selection film 80 (light exit surface 776) at the first light exit port 774 into the second packaging shell 78 to excite the second wavelength conversion device 50. The second wavelength conversion device 50 is excited by the first fluorescence A to generate a second fluorescence B. Part of the first fluorescence A and the second fluorescence B are mixed in the second cavity 74 to form the output light.
[0030] In some embodiments of the present application, the first wavelength conversion device 30 is disposed on the inner wall of the first package shell 77, and is disposed opposite to the light entrance 772 to receive the excitation light P incident through the light entrance 772. The first wavelength conversion device 30 may include a reflective layer 38 and a first fluorescent layer 33. The reflective layer 38 is disposed on the side wall of the first package shell 77. Specifically, the reflective layer 38 is disposed on the side wall of the first package shell 77 opposite to the light entrance 772. The first fluorescent layer 33 is disposed on a side of the reflective layer 38 away from the inner wall of the first package shell 77. The first fluorescent layer 33 is opposite to the light entrance 772 and is excited by the excitation light P incident from the light entrance 772 to generate the first fluorescent light A.
[0031] The present specification does not limit the specific structure of the reflective layer 38. For example, the reflective layer 38 can be a dielectric film, a metal reflective film, a diffuse reflective film, etc. In some embodiments of the present application, the reflective layer 38 is a total reflective film, and the reflective layer 38 is disposed on the side wall of the first packaging shell 77. If the material of the shell 70 is light-transmissive, the reflective layer 38 can be disposed on the outer wall of the first packaging shell 77 or on the inner wall of the first packaging shell 77; when the reflective layer 38 is disposed on the outer wall of the first packaging shell 77, the reflective surface of the reflective layer 38 faces the interior of the first cavity 72. In order to simplify the operation and reduce the oxidation of the reflective layer 38, in some embodiments of the present application, the reflective layer 38 is coated on the inner wall of the first packaging shell 77, and the first fluorescent layer 33 is coated on the reflective layer 38.
[0032] The first fluorescent layer 33 may include a first sub-fluorescent layer 34 and / or a second sub-fluorescent layer 36. The first sub-fluorescent layer 34 is excited to generate a first sub-fluorescent light A1, and the second fluorescent layer 334 is excited to generate a second sub-fluorescent light A2. The present specification does not limit the arrangement of the first sub-fluorescent layer 34 and / or the second sub-fluorescent layer 36 on the reflective layer 38. For example, when the first fluorescent layer 33 includes the first sub-fluorescent layer 34 and the second sub-fluorescent layer 36, the first sub-fluorescent layer 34 and the second sub-fluorescent layer 36 may be mixedly arranged on the reflective layer 38. The first sub-fluorescent layer 34 and the second sub-fluorescent layer 36 may also be respectively arranged at different positions of the reflective layer 38. The first sub-fluorescent layer 34 and the second sub-fluorescent layer 36 may also be sequentially stacked on the same surface of the reflective layer 38. In some embodiments of the present application, the first sub-fluorescent layer 34 and the second sub-fluorescent layer 36 are mixedly arranged on a surface of the reflective layer 38 away from the inner wall of the first encapsulation shell 77, and the first sub-fluorescent layer 34 and the second sub-fluorescent layer 36 are located on the optical path of the excitation light P.
[0033] The wavelength of the first sub-fluorescence A1 is different from the wavelength of the second sub-fluorescence A2, and the wavelength of the first sub-fluorescence A1 and the wavelength of the second sub-fluorescence A2 are both smaller than the wavelength of the red fluorescence. The first wavelength conversion device 30 is arranged on the optical path of the excitation light P, and the excitation light P is used to excite the fluorescent layer to generate fluorescence. The luminescence mechanism of the fluorescent layer is to excite the molecules or atoms of the substance through high energy, so that they enter the excited state, and when they are de-excited from the excited state to the ground state, they release photons, that is, generate fluorescence. The wavelength of the first sub-fluorescence A1 and the wavelength of the second sub-fluorescence A2 are both smaller than the wavelength of the red fluorescence, so that the red fluorescent layer of the second wavelength conversion device 50 can be excited by the first fluorescence A to generate red fluorescence.
[0034] The present specification does not limit the specific types of the first sub-fluorescent layer 34 and the second sub-fluorescent layer 36, and the first sub-fluorescent layer 34 and the second sub-fluorescent layer 36 are adapted to the type of the excitation light P. In some embodiments of the present application, the excitation light P includes ultraviolet laser, the first sub-fluorescent layer 34 is a blue fluorescent layer, and the first sub-fluorescent layer A1 is a blue fluorescent layer. The second sub-fluorescent layer 36 is a yellow fluorescent layer or a green fluorescent layer, and the second sub-fluorescent layer A2 is a yellow fluorescent layer or a green fluorescent layer.
[0035] As an example, the first sub-fluorescent layer 34 is a blue fluorescent layer, the second sub-fluorescent layer 36 is a green fluorescent layer, the first sub-fluorescent layer A1 is blue fluorescent, and the second sub-fluorescent layer A2 is green fluorescent. In some embodiments of the present application, the first sub-fluorescent layer 34 and the second sub-fluorescent layer 36 are mixed and arranged on the reflective layer 38, and the first sub-fluorescent layer 33 is a blue-green mixed fluorescent layer. When in use, the light source 10 emits an ultraviolet laser (excitation light P), and the ultraviolet laser propagates to the first sub-fluorescent layer 34 and the second sub-fluorescent layer 36, and the first sub-fluorescent layer 34 is excited to produce blue fluorescence, and the second sub-fluorescent layer 36 is excited to produce green fluorescence. The blue fluorescence and the green fluorescence propagate to the red fluorescent layer of the second wavelength conversion device 50, and part of the blue fluorescence and part of the green fluorescence excite the red fluorescent layer to produce red fluorescence. The red fluorescence, part of the blue fluorescence and part of the green fluorescence are mixed to form white light emission light, and the addition of red fluorescence greatly improves the color rendering index of the white light emission light, and increases the scope of application of the light source module 100 provided in the embodiment of the present application.
[0036] In some other embodiments of the present application, the excitation light P may also include a blue laser, the first sub-fluorescence A1 may be a yellow fluorescence, the second sub-fluorescence A2 may be a green fluorescence, the first sub-fluorescence layer 34 may be a yellow fluorescence layer, the second sub-fluorescence layer 36 may be a green fluorescence layer, and the first sub-fluorescence 33 may be a yellow-green mixed fluorescence layer. The yellow-green mixed fluorescence layer may be excited by the blue laser to generate yellow fluorescence and green fluorescence.
[0037] It should be noted that in some embodiments of the present application, the yellow fluorescent layer, green fluorescent layer, blue fluorescent layer, yellow-green mixed fluorescent layer, blue-green mixed fluorescent layer in the above-mentioned first wavelength conversion device 30, and the red fluorescent layer in the second wavelength conversion device can all use existing fluorescent powders, which is not limited here.
[0038] In some embodiments of the present application, the selection film 80 is also used to reflect the excitation light P. The excitation light P is incident through the light inlet 772, propagates to the first wavelength conversion device 30 and excites it to generate the first fluorescence A. The first fluorescence A is reflected to the selection film 80 and can be transmitted into the second cavity 74. If the reflective layer 38 reflects the excitation light P to the selection film 80, it will be reflected back to the first cavity 72 by the selection film 80 to continue to excite the first fluorescent layer 33, and will not enter the second cavity 74. On the one hand, it avoids the second wavelength conversion device 50 in the second cavity 74 from being excited by the excitation light P and being thermally quenched, thereby improving the stability of the light source module 100; on the other hand, the selection film 80 increases the number of reflections of the excitation light P in the first cavity 72, thereby increasing the number of times the first wavelength conversion device 30 is excited, improving the excitation efficiency of the excitation light P, and improving the utilization rate of the first wavelength conversion device 30. This specification does not limit the specific type of the selection film 80. The selection film 80 can be a transflective lens. In some embodiments of the present application, the selection film 80 is a band-pass light-transmitting lens.
[0039] The light-emitting surface 776 is parallel to the optical path of the excitation light P propagating from the light inlet 772 to the first wavelength conversion device 30. The excitation light P has good collimation, and the light-emitting surface 776 is parallel to the optical path of the excitation light P propagating from the light inlet 772 to the first wavelength conversion device 30, which avoids the excitation light P from directly propagating to the light-emitting surface 776, and further ensures that the excitation light P will not enter the second cavity 74 to excite the second wavelength conversion device 50.
[0040] In some embodiments of the present application, the light source module 100 further includes a transflective member 60, which is disposed in the first packaging shell 77 and is located between the light source 10 and the first wavelength conversion device 30, and between the light source 10 and the second wavelength conversion device 50. The transflective member 60 is used to transmit the excitation light P, and to reflect the first fluorescence A to the first light outlet 774. When in use, the excitation light P is incident through the light inlet 772, propagates to the first wavelength conversion device 30 and excites it to generate the first fluorescence A, and the reflective layer 38 reflects the first fluorescence A and the unabsorbed excitation light P to the transflective member 60, and the transflective member 60 transmits the excitation light P, and reflects the first fluorescence A to the first light outlet 774.
[0041] The present specification does not limit the specific structure of the transflective element 60. For example, the transflective element 60 may be a transflective lens, or the transflective element 60 may be a transflective film. In some embodiments of the present application, the transflective element 60 includes a plane mirror 61 and a transflective coating 63. The plane mirror 61 is disposed in the first packaging shell 77, the light inlet 772 is located on one side of the plane mirror 61, and the first wavelength conversion device 30 is located on the other side of the plane mirror 61. The plane mirror 61 is tilted so that the first light outlet 774 and the selection film 80 are located on the side of the plane mirror 61 facing the first wavelength conversion device 30. The transflective coating 63 is coated on the surface of the plane mirror 61 facing the first wavelength conversion device 30, which is used to transmit the excitation light P and reflect the fluorescence.
[0042] In some embodiments of the present application, the second encapsulation shell 78 may further include a second light outlet 781, and the second light outlet 781 is arranged in the emission direction of the second fluorescence B. The excitation light P enters the first encapsulation shell 77 through the light inlet 772 and excites the first wavelength conversion device 30, and the first wavelength conversion device 30 generates the first fluorescence A. The first fluorescence A is transmitted through the selection film 80 at the first light outlet 774 and enters the second encapsulation shell 78 to excite the second wavelength conversion device 50. The second wavelength conversion device 50 is excited by the first fluorescence A to generate the second fluorescence B. Part of the first fluorescence A and the second fluorescence B are mixed in the second cavity 74 and are emitted through the second light outlet 781 to form the emission light. In order to further improve the light emission quality, in some embodiments of the present application, the shell 70 at the second light outlet 781 may be made of glass or sapphire.
[0043] When the light source module 100 provided in the embodiment of the present application is used, the light source 10 emits an excitation light P, which propagates to the first wavelength conversion device 30, and the first wavelength conversion device 30 is excited to generate a first fluorescence A, which propagates to the second wavelength conversion device 50, and part of the first fluorescence A excites the second wavelength conversion device 50 to generate a second fluorescence B. The second fluorescence B and part of the first fluorescence A are mixed to form an outgoing light. The second wavelength conversion device 50 includes at least a red fluorescent layer, and the second fluorescence B includes at least red fluorescence. The red fluorescence increases the color rendering index of the outgoing light. The red fluorescence is generated by the first fluorescence A exciting the red fluorescent layer, avoiding the problem of thermal attenuation of the red fluorescent layer directly excited by the excitation light P, and improving the application stability of the red fluorescent layer, so as to achieve the effect of increasing the proportion of the red luminescent component and achieving the output of warm white light while avoiding the photothermal damage of the red fluorescent layer. The light source module 100 remotely encapsulates the red fluorescent layer through the second encapsulation shell 78 (compared to the remote encapsulation of the light source 10), away from the laser heat source (light source 10), avoiding ultraviolet laser exposure, and making the thermal stability of the red fluorescence more stable.
[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements 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 the present application.
Claims
1. A light source module, characterized in that: The light source module comprises: A housing, comprising a first packaging shell and a second packaging shell, wherein the second packaging shell is connected to one side of the first packaging shell; A light source is disposed on one side of the housing, and is used to emit excitation light; a first wavelength conversion device, disposed in the first packaging shell and located on the optical path of the excitation light, and used for generating a first fluorescence under the excitation of a part of the excitation light; and A second wavelength conversion device is arranged in the second packaging shell and is located on the optical path of the first fluorescence, and is used to generate a second fluorescence under the excitation of a portion of the first fluorescence, the wavelength of the first fluorescence is smaller than the wavelength of the second fluorescence, and the second fluorescence and a portion of the first fluorescence are mixed to form an output light, wherein the second wavelength conversion device at least includes a red fluorescent layer, and the second fluorescent includes at least red fluorescence.
2. The light source module according to claim 1, characterized in that: The first wavelength conversion device includes a first sub-fluorescence layer and / or a second sub-fluorescence layer. The first sub-fluorescence layer and the second sub-fluorescence layer are excited to generate a first sub-fluorescence and a second sub-fluorescence respectively. The wavelength of the first sub-fluorescence is different from that of the second sub-fluorescence, and the wavelength of the first sub-fluorescence and the wavelength of the second sub-fluorescence are both smaller than the wavelength of the red fluorescence.
3. The light source module according to claim 2, characterized in that: The first wavelength conversion device also includes a reflective layer, which is arranged on the inner wall of the first packaging shell, and the first sub-fluorescent layer and / or the second sub-fluorescent layer are arranged on a side of the reflective layer away from the inner wall of the first packaging shell, and the first sub-fluorescent layer and the second sub-fluorescent layer are located in the optical path of the excitation light.
4. The light source module according to claim 2, characterized in that: The excitation light includes ultraviolet laser, the first sub-fluorescence is blue fluorescence, and the second sub-fluorescence is yellow fluorescence or green fluorescence; or, The excitation light includes a blue laser, the first sub-fluorescence is a yellow fluorescence, and the second sub-fluorescence is a green fluorescence.
5. The light source module according to claim 1, characterized in that: The light source module also includes a selection film, the first packaging shell is provided with a first cavity, the second packaging shell is provided with a second cavity, and the first cavity is connected to the second cavity; the selection film is arranged in the shell and separates the first cavity and the second cavity, and the selection film is used to reflect the excitation light and transmit the first fluorescence.
6. The light source module according to claim 5, characterized in that: The first wavelength conversion device is arranged on the inner wall of the first packaging shell, and the first packaging shell has a light entrance, and the light entrance is located on the optical path of the excitation light; the first wavelength conversion device is arranged opposite to the light entrance to receive the excitation light incident through the light entrance.
7. The light source module according to claim 6, characterized in that: The first packaging shell also has a first light outlet, the selection film is arranged at the first light outlet to serve as the light outlet surface of the first packaging shell, the second wavelength conversion device is arranged on the side of the selection film away from the first packaging shell, and the first fluorescence in the first cavity is emitted through the light outlet surface and then enters the second wavelength conversion device of the second packaging shell.
8. The light source module according to claim 7, characterized in that: The light source module also includes a transflective component, which is arranged in the first packaging shell and is located between the light source and the first wavelength conversion device, and between the light source and the second wavelength conversion device. The transflective component is used to transmit the excitation light and to reflect the first fluorescence to the first light outlet.
9. The light source module according to claim 8, characterized in that: The second packaging shell further includes a second light outlet, and the second light outlet is arranged in an outlet direction of the second fluorescent light.
10. A lighting device, characterized in that: include: A light source module as claimed in any one of claims 1 to 9.