Light source device and lighting equipment

Abstract

The embodiment of the utility model provides a light source device which comprises a light source, a first wavelength conversion device, a light guide piece and a second wavelength conversion device, the first wavelength conversion device receives and converts at least part of exciting light into first excited light, and the light guide piece is used for guiding the first excited light and first residual exciting light. The second wavelength conversion device receives and converts at least part of the first residual exciting light guided by the light guide piece into second excited light, and the first residual exciting light, the second residual exciting light, the first excited light and the second excited light penetrate through the second wavelength conversion device. The energy of the exciting light is absorbed by the first wavelength conversion device, the energy of the exciting light transmitted to the second wavelength conversion device is reduced, rapid temperature rise of the second wavelength conversion device is avoided, the heat dissipation area of the first wavelength conversion device adopting reflection illumination is larger, the heat dissipation effect is better, and the heat dissipation requirement of a follow-up high-power light source is met. The embodiment of the utility model further provides lighting equipment.

Description

Technical Field

[0001] The present application relates to the technical field of lighting equipment, and in particular to a light source device and lighting equipment. Background Art

[0002] The light source device forms stimulated light by irradiating the fluorescent material with excitation light, and the stimulated light and the excitation light are combined to emit white light. However, the existing excitation light needs to undergo multiple excitation conversions, and the excitation light and multiple stimulated light are combined to form white light with a high color rendering index to meet subsequent use requirements. Because multiple conversions are required to meet subsequent brightness requirements, the power of the light source device is forced to increase, and the energy of the excitation light will also increase with the increase in power, and then the temperature of the fluorescent material will rise sharply. The temperature will affect the conversion efficiency of the fluorescent material, and will also limit the maximum power of the light source device. What's more, there may be safety hazards. Utility Model Content

[0003] The embodiments of the present application provide a light source device and a lighting equipment to at least partially improve the above technical problems.

[0004] In a first aspect, an embodiment of the present application provides a light source device, comprising a light source, a first wavelength conversion device, a light guide, and a second wavelength conversion device, the light source being used to emit excitation light, the first wavelength conversion device receiving and converting at least part of the excitation light into a first excited light, and the remaining excitation light being a first remaining excitation light, the first wavelength conversion device reflecting the first excited light and the first remaining excitation light, the light guide being used to guide the first excited light and the first remaining excitation light, the second wavelength conversion device receiving and converting at least part of the first remaining excitation light guided by the light guide into a second excited light, and the excitation light that is not converted is the second remaining excitation light, and the second wavelength conversion device transmitting the first remaining excitation light, the second remaining excitation light, the first excited light, and the second excited light; wherein the wavelengths of the first excited light and the second excited light are not equal.

[0005] In one embodiment, the wavelength range of the excitation light is 405 nm-455 nm, the wavelength range of the first stimulation light is 490 nm-580 nm, and the wavelength range of the second stimulation light is 590 nm-680 nm.

[0006] In one embodiment, the light guide includes a condenser, the condenser is provided with a reflective layer, the first wavelength conversion device and the second wavelength conversion device are both arranged in the condenser, and the reflective layer is used to guide the first stimulated light and the first residual excitation light to transmit in a predetermined direction.

[0007] In one embodiment, the condenser has a first end and a second end, the first wavelength conversion device is arranged at the first end, the second wavelength conversion device is arranged at the second end, and the axial diameter of the condenser gradually increases from the first end to the second end.

[0008] In one embodiment, the cone angle of the condenser is 45°-75°.

[0009] In one embodiment, the light source is disposed outside the condenser, and the condenser is provided with a through hole, and the excitation light emitted by the light source is incident on the first wavelength conversion device through the through hole.

[0010] In one embodiment, the incident angle of the excitation light emitted by the light source into the first wavelength conversion device is 45°-90°.

[0011] In one embodiment, the first wavelength conversion device includes a first fluorescence conversion layer, a reflective layer and a substrate. The first fluorescence conversion layer is disposed on a surface of the reflective layer, and the substrate is disposed on a surface of the reflective layer away from the first fluorescence conversion layer.

[0012] In one embodiment, the second wavelength conversion device includes a second fluorescence conversion layer, a matrix layer and an adhesive layer. The second fluorescence conversion layer is disposed on a surface of the matrix layer, and the adhesive layer is disposed between the matrix layer and the second fluorescence conversion layer.

[0013] In a second aspect, an embodiment of the present application provides a lighting device, comprising the light source device of the first aspect.

[0014] The embodiment of the present application provides a light source device and a lighting device, wherein the light source emits excitation light, and the excitation light passes through a first wavelength conversion device and a second wavelength conversion device, the first wavelength conversion device emits a first stimulated light, the second wavelength conversion device emits a second stimulated light, and the first stimulated light, the second stimulated light, and the remaining excitation light that has not been excited are combined and emitted outside the light source device. During this period, the energy of the excitation light has been absorbed by the first wavelength conversion device, and the energy of the excitation light propagated to the second wavelength conversion device has been reduced, so as to avoid a sharp increase in the temperature of the second wavelength conversion device. The heat dissipation area of ​​the first wavelength conversion device for reflective illumination is larger, and the heat dissipation effect is better, so that the energy of the excitation light can be transferred faster to meet the heat dissipation requirements of subsequent high-power light sources. The first stimulated light, the second stimulated light, and the remaining excitation light that has not been excited compensate each other, which is conducive to improving the color rendering index of the emitted light of the light source device, and realizing a high color rendering index and full-spectrum lighting effect of the light source device. During this period, the light guide can guide the first stimulated light and the first remaining excitation light so that the first remaining excitation light can be reabsorbed, or the first stimulated light can be guided to be emitted, so as to improve the energy utilization rate of the lighting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the implementation modes of the present application, the drawings required for use in the description of the implementation modes will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic diagram of the structure of a car proposed in an embodiment of the present application;

[0017] Figure 2 A schematic diagram of the structure of a light source device proposed in an embodiment of the present application.

[0018] Figure numerals: lighting device 1, light source device 100, light source 10, first wavelength conversion device 20, first fluorescence conversion layer 21, reflection layer 22, substrate 23, light guide 30, condenser 31, first end 311, second end 312, through hole 32, second wavelength conversion device 40, second fluorescence conversion layer 41, matrix layer 42, adhesive layer 43, automobile 2. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the implementation mode of the present application. Obviously, the described implementation mode is only a part of the implementation mode of the present application, not all the implementation modes. Based on the implementation mode in the present application, all other implementation modes obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0020] In this application, unless otherwise clearly specified or limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements, or it can be only surface contact, or surface contact connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0021] In addition, the terms "first", "second", etc. are only used to distinguish descriptions and cannot be understood as specific or special structures. The descriptions of the terms "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, 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 can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0022] The light source device is an excitation light that irradiates the fluorescent material to form a stimulated light, and the stimulated light and the excitation light are emitted to form white light. However, the existing excitation light needs to be converted to excite a variety of different luminescent fluorescent materials, and the excitation light and a variety of different stimulated light are combined to form white light. Due to the need to meet the conversion needs of a variety of fluorescent materials, the power of the light source device increases, and the energy of the excitation light will also increase with the power increase, and then the temperature of the fluorescent material will rise sharply. The temperature change affects the conversion efficiency of the fluorescent material, and also limits the maximum power of the light source device. What's more, there may be safety hazards.

[0023] In the existing light source device, it adopts transmission lighting or reflection lighting. Transmission lighting refers to the method in which the excitation light is directly projected onto the surface of the fluorescent material, and the excitation light and the stimulated light are emitted from the other surface of the fluorescent material. However, due to the concentration of laser energy, the heat of the transmission fluorescent material is not easy to be discharged, which reduces its fluorescence conversion efficiency. Reflection lighting refers to the method in which the excitation light is projected onto the surface of the fluorescent material, and after passing through the fluorescent material, the excitation light and the stimulated light are reflected again from the incident surface of the excitation light. However, reflection lighting has problems such as the lack of light emission in the short-wave green light and long-wave red light bands, low white light color rendering index, and low quality of the emitted light.

[0024] The present application embodiment provides a lighting device 1, see Figure 1 The lighting device 1 can be applied to automobile lighting, medical equipment lighting, building lighting, etc., and this embodiment does not limit this. In order to describe the lighting device 1 more specifically, the following content describes the lighting device 1 applied to automobile lighting.

[0025] See also Figure 1The lighting device 1 can be set as a driving light of the automobile 2, which is suitable for driving lighting of the automobile 2. The lighting device 1 can be installed in the body of the automobile 2, and the body can be a collection of a frame and a cover. More specifically, the lighting device 1 can include a light source device 20 and optical elements such as a lens. The light source device 20 emits illumination light, and the lens adjusts the illumination light and emits it to the outside. In a dark environment, the light source device 20 can illuminate the surrounding driving environment and improve the driving safety of the driver and passengers.

[0026] In another embodiment, the automobile 2 further includes a head-up display device (not shown in the figure), and the light source device 20 of the lighting device 1 can also be arranged in the head-up display device, the light source device 20 emits illumination light, and the head-up display device modulates the illumination light to form image light. The image light includes but is not limited to driving conditions, navigation prompts, etc. The driver obtains the driving conditions of the automobile 2 through the image light, thereby improving the driving safety of the driver and passengers.

[0027] See also Figure 2 The light source device 100 may include a light source 10, a first wavelength conversion device 20, a light guide 30 and a second wavelength conversion device 40. The first wavelength conversion device 20 and the second wavelength conversion device 40 are arranged in the light guide 30, and the light source 10 is arranged outside the light guide 30 and emits excitation light toward the first wavelength conversion device 20.

[0028] The light source 10 is used to emit excitation light, and the light source 10 may be a laser light source. The light source 10 emits laser light, which has the characteristics of high brightness, strong directionality, and small size. In one embodiment, the wavelength range of the excitation light may be 405nm-455nm, and the excitation light may be blue light.

[0029] In another embodiment, the light source 10 can be a light emitting diode (LED) light source, etc. The LED light source emits fluorescence. The LED light source has the characteristics of low cost and long life, and can be selected and designed according to specific needs and usage scenarios.

[0030] Please continue reading Figure 2 , the first wavelength conversion device 20 can receive and convert at least part of the excitation light into the first converted light, and the remaining excitation light is the first residual excitation light. More specifically, the wavelength range of the excitation light can be 405nm-455nm, the first wavelength conversion device 20 receives the excitation light and emits the first converted light, and the wavelength range of the first converted light can be 490nm-580nm. The first wavelength conversion device 20 can combine the first converted light and the first residual excitation light, and reflect them to the second wavelength conversion device 40 and / or the light guide 30.

[0031] In a more specific embodiment, the first wavelength conversion device 20 may include a first fluorescence conversion layer 21, a reflective layer 22 and a substrate 23. The first fluorescence conversion layer 21 may include at least one of YAG:Ce or LuAG:Ce, GAGG:Ce, GAG:Ce, YAGG:Ce and LuAGG:Ce. The reflective layer 22 has the characteristics of high reflectivity and high thermal conductivity, and includes Ag. 60 Cu 30 Sn 10 、Ag 72 Cu 28 、Ag 85 Cu 15 and Ag 92.5 Cu 7.5 At least one of the above. The reflective layer 22 with high reflectivity can reflect efficiently and reduce the loss of light. In addition, the reflective layer 22 can also quickly conduct heat to the substrate 23. The reflective layer 22 can also be integrally formed with the first fluorescent conversion layer 21 and the substrate 23 through high-temperature hot pressing and other processes to improve the structural strength of the first wavelength conversion device 20.

[0032] The substrate 23 can be a metal plate with high thermal conductivity, a metal-based ceramic composite plate, etc., such as a copper-based ceramic composite plate or an aluminum-based ceramic composite plate. The substrate 23 can provide support for the reflective layer 22 and the first fluorescent conversion layer 21 to prevent the reflective layer 22 and the first fluorescent conversion layer 21 from being deformed by external force or their own weight. In addition, the substrate 23 can also quickly dissipate heat to the environment to ensure the structural stability of the reflective layer 22 and the first fluorescent conversion layer 21 in a high temperature environment.

[0033] The first fluorescence conversion layer 21 is disposed on the surface of the reflective layer 22, and the substrate 23 is disposed on the surface of the reflective layer 22 away from the first fluorescence conversion layer 21. The excitation light passes through the first fluorescence conversion layer 21, and at least part of the excitation light is excited by the first fluorescence conversion layer 21 and emits the first converted light. The first converted light and the unexcited first residual excitation light are reflected by the reflective layer 22, pass through the first fluorescence conversion layer 21 again, and propagate to the light guide 30. The excitation light is converted twice in the first fluorescence conversion layer 21, and the two conversions can ensure that enough excitation light is absorbed and converted by the first fluorescence conversion layer 21. At the same time, when enough excitation light is excited, the first fluorescence conversion layer 21 can be set thinner, and the thinner first fluorescence conversion layer 21 can shorten the heat channel distance of the first wavelength conversion device 20 and accelerate the heat transfer efficiency in the first wavelength conversion device 20.

[0034] Please continue reading Figure 2, the first fluorescence conversion layer 21 can receive the excitation light and convert at least part of the excitation light into the first converted light. Further, the first fluorescence conversion layer 21 can be a phosphor layer, the first fluorescence conversion layer 21 can be a yellow-green phosphor layer, and the wavelength range of the first converted light can be 490nm-580nm. The reflective layer 22 is located in the optical path of the first converted light and the unconverted excitation light. The first converted light and the unconverted first residual excitation light are emitted to the reflective layer 22 together, and are reflected by the reflective layer 22 to the second wavelength conversion device 40 and / or the light guide 30. The heat of the excitation light is transferred from the first fluorescence conversion layer 21 to the reflective layer 22, and is transferred from the reflective layer 22 to the substrate 23. The substrate 23 can dissipate the heat to the environment, which plays a heat dissipation role to reduce the temperature of the first wavelength conversion device 20. The substrate 23 can prevent high temperature from affecting the fluorescence conversion of the first fluorescence conversion layer 21, and improve the fluorescence conversion efficiency of the first wavelength conversion device 20. Moreover, most of the heat of the excitation light has been absorbed by the first wavelength conversion device 20 and transmitted to the environment through the substrate 23, reducing the heat of the first excited light and the unconverted excitation light, so as to reduce the heat when transmitted to the second wavelength conversion device 40, which is beneficial to reducing the thermal effect of the second wavelength conversion device 40 and ensuring the fluorescence conversion efficiency of the second wavelength conversion device 40.

[0035] In another embodiment, the first wavelength conversion device 20 further includes a heat conduction layer (not shown in the figure), which is disposed between the substrate 23 and the reflective layer 22. The heat conduction layer may be an alloy layer, such as a copper-nickel alloy layer, a copper-tin alloy layer, etc. The heat conduction layer may have high welding performance and thermal conductivity, etc., and it can be stably connected between the substrate 23 and the reflective layer 22, further improving the structural stability of the first wavelength conversion device 20. At the same time, the heat conduction layer with high thermal conductivity can further improve the heat transfer efficiency from the reflective layer 22 to the substrate 23, further reduce the thermal effect of the second wavelength conversion device 40, and ensure the fluorescence conversion efficiency of the second wavelength conversion device 40.

[0036] In some other cases, the light source device 100 may also be provided with a heat dissipation device (not shown in the figure), which is provided on the surface of the substrate 23 away from the first wavelength conversion device 20. The heat dissipation device includes but is not limited to heat dissipation fins, heat dissipation fans, liquid cooling devices, etc. The heat dissipation device can absorb and transfer the heat of the substrate 23, reduce the operating temperature of the first wavelength conversion device 40, and further improve its fluorescence conversion efficiency.

[0037] In one embodiment, the incident angle of the excitation light emitted by the light source 10 into the first wavelength conversion device 20 is 0-45°. Figure 2 As shown by the angle a, Figure 2L1 in the figure is the normal of the incident surface of the excitation light in the first wavelength conversion device 20, and the incident angle is the angle between the incident direction of the excitation light and the normal. The incident angle cannot exceed 45°. A too large incident angle will affect the position of the light spot reflected by the excitation light on the second wavelength conversion device 23, thereby affecting the fluorescence conversion effect of the second wavelength conversion device 23. At the same time, a too large incident angle is not convenient for setting the relative position between the light source 21 and the first fluorescence conversion layer 221, and will also affect the volume of the light source device 20. A suitable incident angle can make the excitation light absorbed by the first wavelength conversion device 20 and reflected smoothly, and will not interfere with the operation of the second wavelength conversion device 40.

[0038] Please continue reading Figure 2 , on the incident surface of the first wavelength conversion device 20 and the second wavelength conversion device 40, the first converted light and the excitation light may be reflected, and the part of the excitation light will be reflected to other areas, which cannot be used, and may cause energy waste. In this embodiment, the light guide 30 can be configured in a cone, a prism, a frustum, etc., which is not limited in this embodiment. The light guide 30 is used to guide the first converted light and the first remaining excitation light to be transmitted in a predetermined direction, wherein the predetermined direction can be the direction of the light guide 30 close to the first wavelength conversion device 20 or the second wavelength conversion device 40. The first converted light and the first remaining excitation light will be reflected to the light guide 30. Affected by the shape and size of the light guide 30, the first converted light and the first remaining excitation light can be reflected to the first wavelength conversion device 20 or the second wavelength conversion device 40, and the excitation light is absorbed and converted again, and the first converted light and the first remaining excitation light are finally emitted to the outside of the second wavelength conversion device 40. In this embodiment, the light guide 30 is used to realize the reuse of energy, reduce the wasted beam energy, and improve the energy utilization rate of the light source device 100.

[0039] In a more specific implementation, please continue to refer to Figure 2, the light guide 30 includes a condenser 31, which can be configured in a cone, a prism, a truncated cone, or the like. For example, the condenser 31 can be configured as a high thermal conductivity condenser, such as a stainless steel condenser, a copper condenser, or the like, and the high thermal conductivity condenser 31 can quickly transfer the internal heat to reduce the temperature inside the condenser 31. Further, the condenser 31 is provided with a reflective layer 22, which can cover the inner wall or the outer wall of the condenser 31, and the first wavelength conversion device 20 and the second wavelength conversion device 40 are both disposed in the condenser 31. The first stimulated light and the first residual excitation light propagate among the condenser 31, the first wavelength conversion device 20, and the second wavelength conversion device 40. The reflective layer 22 is used to guide the first excited light and the first residual excitation light. At the same time, the first excited light and the first residual excitation light can be reflected to the first wavelength conversion device 20 or the second wavelength conversion device 40, and the excitation light is absorbed and converted again, and the first excited light and the first residual excitation light are finally emitted to the outside of the second wavelength conversion device 40. In this embodiment, the condenser 31 is used to realize the reuse of energy, reduce the wasted beam energy, and improve the energy utilization rate of the light source device 100. In addition, the energy of the first wavelength conversion device 20 and the second wavelength conversion device 40 will be transmitted to the condenser 31, and then the heat will be transmitted to the external environment through the condenser 31. The condenser 31 increases the heat dissipation area of ​​the first wavelength conversion device 20 and the second wavelength conversion device 40, which quickly transfers the internal heat to ensure the safe use of the light source device 100.

[0040] More specifically, the condenser 31 has a first end 311 and a second end 312, and the first end 311 and the second end 312 are far from each other. The first wavelength conversion device 20 is arranged at the first end 311, and at least part of the shape and size of the first wavelength conversion device 20 are arranged corresponding to the first end 311, and the connection method of the first wavelength conversion device 20 and the first end 311 can be clamping, bonding, or fastener connection. The second wavelength conversion device 40 is arranged at the second end 312, and at least part of the shape and size of the second wavelength conversion device 40 are arranged corresponding to the second end 312, and the connection method of the second wavelength conversion device 40 and the second end 312 can be clamping, bonding, or fastener connection. The axial diameter of the condenser 31 gradually increases from the first end 311 to the second end 312. Compared with the first wavelength conversion device 20, the second wavelength conversion device 40 is larger in size within the condenser 31, so that the first residual excitation light and the first stimulated light can be guided to more areas of the second wavelength conversion device 40, and the heat contained therein can also be dispersed to various areas of the second wavelength conversion device 40, so that the remaining first residual excitation light is absorbed and converted by the second wavelength conversion device 40, thereby avoiding excessive temperature in a single area of ​​the second wavelength conversion device 40 and ensuring the service life of the second wavelength conversion device 40.

[0041] The light source 10 is arranged outside the condenser 31. This configuration can prevent the heat generated by the light source 10 from being accumulated in the condenser 31, thereby reducing the heat dissipation pressure of the condenser 31. The condenser 31 is provided with a through hole 32, which is arranged opposite to the light source 10. The excitation light emitted by the light source 10 is incident on the first wavelength conversion device 20 through the through hole 32. The through hole 32 can not only ensure that the excitation light is emitted to the first wavelength conversion device 20, but also restrict the aperture of the excitation light incident on the first wavelength conversion device 20, thereby reducing the imaging range of the excitation light on the first fluorescent conversion layer 21. A smaller imaging range can make the reflection direction of the excitation light and the first converted light more controllable, thereby improving the reliability of the light source device 100. It can be understood that the size and relative position of the through hole 32 can be selected and designed according to the size and position of the first fluorescent conversion layer 21, the shape and relative position of the condenser 31, etc., and this embodiment does not limit this.

[0042] In some embodiments of the present application, the cone angle of the condenser 31 may be 45°-75°. Figure 2 As shown by the angle b in . The cone angle of the condenser 31 should not be set too large or too small. The condenser 31 with too small cone angle reduces its guiding effect on the excitation light and the first converted light. The condenser 31 with too large cone angle will affect the propagation of the excitation light. For example, it is difficult for the excitation light to be incident on the first fluorescent conversion layer 21 from the through hole 32, or the condenser 31 forces the incident angle of the excitation light to be set larger, resulting in only a small amount of excitation light being absorbed by the first fluorescent conversion layer 21. The condenser 31 with a suitable cone angle can allow an appropriate amount of excitation light to be incident on the second wavelength conversion device 40. In other words, the condenser 31 with a suitable cone angle can balance the ratio of the excitation light, the first converted light and the second converted light, so that the excitation light, the first converted light and the second converted light emitted by the light source device 100 are synthesized into white light that just meets the high color temperature requirement.

[0043] It is understandable that the cone angle of the condenser 31 can affect the emission angle of the output light of the second wavelength conversion device 40. The cone angle of the condenser 31 in the embodiment of the present application is smaller than the incident angle of the excitation light incident on the first wavelength conversion device 20, so as to avoid the light source 10 being forced to be in the light path of the output light of the second wavelength conversion device 40.

[0044] Please continue reading Figure 2, the second wavelength conversion device 40 receives and converts at least part of the first residual excitation light guided by the light guide 30 into the second converted light, and the wavelengths of the first converted light and the second converted light are not equal. The excitation light that is not converted by the second wavelength conversion device 40 is the second residual excitation light, and the second wavelength conversion device 40 can transmit the first residual excitation light, the second residual excitation light, the first converted light and the second converted light. More specifically, the wavelength range of the first residual excitation light and the second residual excitation light can be 405nm-455nm, the second wavelength conversion device 40 receives the first residual excitation light and converts it into the second converted light, the wavelength range of the second converted light is 590nm-680nm, and the second converted light is red light. The wavelength range of the first converted light emitted by the first wavelength conversion device 20 can be 490nm-580nm, and the first converted light is yellow-green light. The first converted light, the second converted light, and the unconverted first residual excitation light and / or the second residual excitation light combine to form high-brightness and high-color-temperature white light, and the white light is emitted outside the second wavelength conversion device 40.

[0045] In one embodiment, please refer to Figure 2 The second wavelength conversion device 40 includes a second fluorescent conversion layer 41, a matrix layer 42 and an adhesive layer 43. The matrix layer 42 may include sapphire, transparent ceramic or diamond, etc., which has high thermal conductivity and can quickly conduct heat. The second fluorescent conversion layer 41 may include nitride fluorescent powder, fluoride fluorescent powder, fluorescent ceramic or fluorescent glass, etc. The adhesive layer 43 may include a silicone layer or a glass layer. The adhesive layer 43 can bond the second fluorescent conversion layer 41 and the matrix layer 42 into one body, and it has a matching refractive index. The second fluorescent conversion layer 41 is arranged on the surface of the matrix layer 42, and the adhesive layer 43 is arranged between the matrix layer 42 and the second fluorescent conversion layer 41. The unconverted excitation light passes through the second fluorescent conversion layer 41, and at least part of the first residual excitation light is converted into a second converted light by the second fluorescent conversion layer 41. The first excited light, the second excited light, and the unexcited first residual excitation light and / or the second residual excitation light are transmitted through the matrix layer 42, the bonding layer 43, and the bonding layer 43, and the first excited light, the second excited light, and the unexcited first residual excitation light and / or the second residual excitation light are combined into light and emitted out of the second wavelength conversion device 40.

[0046] In some embodiments of the present application, the excitation light is blue light, and the second wavelength conversion device 40 is provided with an angle selection lens (not shown in the figure), which can selectively allow a certain band of light within a specific angle range to pass through, while limiting the emission of light at other angles and / or other bands. When blue light with a small incident angle is emitted into the angle selection lens, the angle selection lens re-reflects the blue light into the light guide 30. The angle selection lens can prevent the blue light from being emitted directly along the optical axis of the light source device 100, effectively preventing the safety hazards caused by the direct emission of blue laser light.

[0047] It is understandable that the excitation light can be blue light, and the excitation light is first absorbed by the first fluorescent conversion layer 21 and emitted to form the first converted light. The first fluorescent conversion layer 21 is a yellow-green fluorescent material, and the first converted light is yellow-green light. The blue light is first excited to form yellow-green light, which can ensure a higher fluorescence conversion efficiency. After being reflected by the first wavelength conversion device 20, the unexcited first residual excitation light is then excited by the second fluorescent conversion layer 41 to form the second converted light. The second fluorescent conversion layer 41 is a red fluorescent material, and the second converted light is red light. The energy of the excitation light after reflection has decreased, and the irradiation intensity of the first residual excitation light on the second fluorescent conversion layer 41 is reduced, which is conducive to reducing the local heat accumulation of the red fluorescent material, thereby improving the conversion efficiency of the red fluorescent material. In addition, the fluorescent materials of different emission bands are excited to emit light at the same time, realizing the mutual compensation of the spectral components, which is conducive to improving the color rendering index of the emitted light of the light source device 100, and finally realizing the full-spectrum laser illumination of the light source device 100.

[0048] The solution of the present application is described in more detail below in conjunction with specific embodiments.

[0049] Example 1

[0050] The light source is a blue laser, and the wavelength of the excitation light emitted by it is 445nm. The light guide includes a highly reflective condenser. The first fluorescent conversion layer includes YAG:Ce3+ phosphor, and the wavelength of the first excitation light reflected by it is 540nm. The second fluorescent conversion layer includes nitride red phosphor, and the wavelength of the second excitation light emitted by it is 630nm. The first excitation light, the second excitation light, and the remaining excitation photosynthetic light form white light with high brightness and high color rendering index, and the white light is emitted outside the light source device.

[0051] Example 2

[0052] The light source is a blue laser, and the wavelength of the excitation light emitted by it is 460nm. The light guide includes a highly reflective condenser. The first fluorescent conversion layer includes LuAG:Ce3+ phosphor, and the wavelength of the first converted light reflected by it is 520nm. The second fluorescent conversion layer includes a nitride red phosphor, and the wavelength of the second converted light emitted by it is 620nm. The first converted light, the second converted light, and the remaining excitation photosynthetic light form white light with high brightness and high color rendering index, and the white light is emitted outside the light source device.

[0053] Example 3

[0054] The light source is a blue laser, and the wavelength of the excitation light emitted by it is 455nm. The light guide includes a highly reflective condenser. The first fluorescent conversion layer includes LuAG:Ce3+ phosphor, and the wavelength of the first excitation light reflected by it is 520nm. The second fluorescent conversion layer includes fluoride red phosphor, and the wavelength of the second excitation light emitted by it is 630nm. The first excitation light, the second excitation light, and the remaining excitation photosynthetic light form white light with high brightness and high color rendering index, and the white light is emitted outside the light source device.

[0055] Example 4

[0056] The light source is a blue laser, and the wavelength of the excitation light emitted by it is 450nm. The light guide includes a highly reflective condenser. The first fluorescent conversion layer includes GAGG:Ce3+ phosphor, and the wavelength of the first converted light reflected by it is 550nm. The second fluorescent conversion layer includes a nitride red phosphor, and the wavelength of the second converted light emitted by it is 650nm. The first converted light, the second converted light, and the remaining excitation photosynthetic light form white light with high brightness and high color rendering index, and the white light is emitted outside the light source device.

[0057] It can be understood that, as described in the above-mentioned multiple embodiments, according to specific requirements such as the color temperature and color rendering index of the output light, this embodiment can configure the corresponding first fluorescent conversion layer and the type of the second fluorescent conversion layer, etc., so that the output light of the light source device meets different color temperature, display index and other requirements.

[0058] In the light source device 100 and the lighting device 1 provided in this embodiment, the light source 10 emits excitation light, and the excitation light passes through the first wavelength conversion device 20 and the second wavelength conversion device 40. The first wavelength conversion device 20 emits the first stimulated light, and the second wavelength conversion device 40 emits the second stimulated light. The first stimulated light, the second stimulated light, and the remaining excitation light that has not been excited are combined and emitted to the outside of the light source device 100. During this period, most of the energy of the excitation light has been absorbed by the first wavelength conversion device 20, and the energy of the excitation light propagated to the second wavelength conversion device 40 has been reduced, so as to avoid a sharp increase in the temperature of the second wavelength conversion device 40. The first wavelength conversion device 20 using reflected lighting has a larger heat dissipation area and a better heat dissipation effect, and it can transfer the energy of the excitation light faster to meet the heat dissipation requirements of the subsequent high-power light source. The first stimulated light, the second stimulated light, and the remaining excitation light that has not been excited compensate each other, which is conducive to improving the color rendering index of the emitted light of the light source device 100, and realizing the high color rendering index and full-spectrum lighting effect of the light source device 100. During this period, the light guide 30 can guide the first converted light and the first residual excitation light so that the first residual excitation light can be reabsorbed, or the first converted light can be guided to be emitted, so as to improve the energy utilization rate of the lighting device 1 .

[0059] The above implementation modes are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned implementation modes, a person skilled in the art should understand that the technical solutions described in the aforementioned implementation modes can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various implementation modes of the present application, and should all be included in the protection scope of the present application.

Claims

1. A light source device, characterized in that: include: A light source, used for emitting excitation light; a first wavelength conversion device, wherein the first wavelength conversion device receives and converts at least a portion of the excitation light into a first converted light, and the remaining excitation light is a first residual excitation light, and the first wavelength conversion device reflects the first converted light and the first residual excitation light; a light guide, the light guide being used to guide the first stimulated light and the first residual excitation light; a second wavelength conversion device, wherein the second wavelength conversion device receives and converts at least a portion of the first residual excitation light guided by the light guide into a second converted light, and the excitation light that is not converted is the second residual excitation light, and the second wavelength conversion device transmits the first residual excitation light, the second residual excitation light, the first converted light, and the second converted light; The wavelengths of the first converted light and the second converted light are not equal.

2. The light source device according to claim 1, characterized in that: The wavelength range of the excitation light is 405nm-455nm, the wavelength range of the first conversion light is 490nm-580nm, and the wavelength range of the second conversion light is 590nm-680nm.

3. The light source device according to claim 1, characterized in that: The light guide comprises a condenser, the condenser is provided with a reflective layer, the first wavelength conversion device and the second wavelength conversion device are both arranged in the condenser, and the reflective layer is used to guide the first stimulated light and the first residual excitation light to be transmitted in a predetermined direction.

4. The light source device according to claim 3, characterized in that: The condenser has a first end and a second end. The first wavelength conversion device is arranged at the first end, and the second wavelength conversion device is arranged at the second end. The axial diameter of the condenser gradually increases from the first end to the second end.

5. The light source device according to claim 4, characterized in that: The cone angle of the condenser is 45°-75°.

6. The light source device according to claim 3, characterized in that: The light source is arranged outside the condenser, and the condenser is provided with a through hole. The excitation light emitted by the light source passes through the through hole and is incident on the first wavelength conversion device.

7. The light source device according to claim 6, characterized in that: The incident angle of the excitation light emitted by the light source into the first wavelength conversion device is 45°-90°.

8. The light source device according to claim 1, characterized in that: The first wavelength conversion device includes a first fluorescence conversion layer, a reflective layer and a substrate. The first fluorescence conversion layer is disposed on a surface of the reflective layer, and the substrate is disposed on a surface of the reflective layer away from the first fluorescence conversion layer.

9. The light source device according to claim 1, characterized in that: The second wavelength conversion device includes a second fluorescence conversion layer, a matrix layer and an adhesive layer. The second fluorescence conversion layer is disposed on a surface of the matrix layer, and the adhesive layer is disposed between the matrix layer and the second fluorescence conversion layer.

10. A lighting device, characterized in that: Comprising the light source device as described in any one of claims 1-9.

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