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 second wavelength conversion device and a lens assembly, the first wavelength conversion device reflects first excited light and first residual exciting light, and the second wavelength conversion device is arranged on at least one side of the first wavelength conversion device. The second wavelength conversion device reflects the second residual excitation light, the second excited light and the residual first excited light. The exciting light is excited by the first wavelength conversion device and the second wavelength conversion device, heat generated when the exciting light is excited can be dispersed, and the conversion efficiency of the first wavelength conversion device and the second wavelength conversion device is guaranteed. The second wavelength conversion device is located on at least one side of the first wavelength conversion device, the distance between two times of excitation of the excitation light can be shortened, loss generated by propagation is reduced, the size of the light source device can be reduced, and the application range of the light source device is widened. 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, including a light source, a first wavelength conversion device, a second wavelength conversion device and a lens assembly, wherein the light source is used to emit excitation light, the first wavelength conversion device is used to receive the excitation light and convert at least part of the excitation light into a first excited light, the unconverted excitation light is a first residual excitation light, and the first wavelength conversion device reflects the first excited light and the first residual excitation light, the second wavelength conversion device is arranged on at least one side of the first wavelength conversion device, the second wavelength conversion device is used to receive at least part of the first residual excitation light and at least part of the first excited light, and convert them into a second excited light, the unconverted first residual excitation light is the second residual excitation light, the second wavelength conversion device reflects the second residual excitation light, the second excited light and the remaining first excited light, and the lens assembly is used to transmit the first excited light and the second excited light, and reflect at least part of the first residual excitation light and the second residual excitation light.

[0005] In one embodiment, the second wavelength conversion device is disposed on two opposite sides of the first wavelength conversion device.

[0006] In one embodiment, the angle between the normal direction of the first wavelength conversion device and the normal direction of the second wavelength conversion device is 45°-75°.

[0007] In one embodiment, the lens assembly is used to transmit excitation light having an incident angle greater than or equal to 45°, and reflect excitation light having an incident angle less than 45°.

[0008] In one embodiment, the lens assembly includes a light incident surface and a light emitting surface facing each other and a side surface connected between the light incident surface and the light emitting surface, the light incident surface is arranged opposite to the first wavelength conversion device, and the second wavelength conversion device is arranged on at least one side of the first wavelength conversion device and is located between the lens assembly and the first wavelength conversion device.

[0009] In one embodiment, a through hole is opened on the side surface, 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 0-45°.

[0011] In one embodiment, the first wavelength conversion device includes a first fluorescence conversion layer, a first reflection layer, and a first heat sink stacked in sequence.

[0012] In one embodiment, the second wavelength conversion device includes a second fluorescence conversion layer, a second reflective layer, and a second heat sink stacked in sequence.

[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, the light source emits excitation light, and the excitation light passes through a first wavelength conversion device and a second wavelength conversion device. The excitation light is excited by the first wavelength conversion device and the second wavelength conversion device respectively, which can disperse the heat generated when the excitation light is excited, avoid the temperature of the first wavelength conversion device and the second wavelength conversion device from rising sharply, and ensure the conversion efficiency of the first wavelength conversion device and the second wavelength conversion device. The second wavelength conversion device is located on at least one side of the first wavelength conversion device, which can shorten the distance between the two excitations of the excitation light and reduce the loss caused by propagation, and can also reduce the volume of the light source device to improve its scope of application. The first excited light, the second excited light and the remaining unexcited excitation light compensate each other to achieve the high color rendering index of the light source device>90 and the full spectrum lighting requirements. During this period, the lens assembly can reflect part of the unexcited excitation light to avoid safety hazards caused by direct excitation light.

[0015] The lighting device using the above light source device solves the problem of heat accumulation limiting the power of the light source device, and the lighting device can use a higher power light source device. The lighting light of the light source device meets the requirements of high color rendering index>90, high lumen, etc., and the light source device can improve the lighting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 A schematic diagram of the structure of a car proposed in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the structure of a light source device proposed in an embodiment of the present application;

[0019] Figure 3 This is a schematic diagram of the structure of another light source device proposed in an embodiment of the present application.

[0020] Figure numerals: automobile 1, lighting device 10, light source device 20, light source 21, first wavelength conversion device 22, first fluorescence conversion layer 221, first reflection layer 222, first heat sink 223, second wavelength conversion device 23, second fluorescence conversion layer 231, second reflection layer 232, second heat sink 233, lens assembly 24, light incident surface 241, light exit surface 242, side surface 243, through hole 244. DETAILED DESCRIPTION

[0021] 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.

[0022] 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.

[0023] 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.

[0024] Example

[0025] The present application embodiment provides a lighting device 10, see Figure 1 The lighting device 10 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 10 more specifically, the following content describes the lighting device 10 applied to automobile lighting.

[0026] See also Figure 1 The lighting device 10 can be set as a driving light of the automobile 1, which is suitable for driving lighting of the automobile 1. The lighting device 10 can be installed in the body of the automobile 1, and the body can be a collection of a frame and a cover. More specifically, the lighting device 10 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.

[0027] In another embodiment, the automobile 1 further includes a head-up display device (not shown in the figure), and the light source device 20 of the lighting device 10 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 1 through the image light, thereby improving the driving safety of the driver and passengers.

[0028] See also Figure 2 The light source device 20 may include a light source 21, a first wavelength conversion device 22, a second wavelength conversion device 23 and a lens assembly 24. The first wavelength conversion device 22 and the lens assembly 24 may be connected to the second wavelength conversion device 23. The light source 21 may be disposed outside the second wavelength conversion device 23 and emit light toward the first wavelength conversion device 22.

[0029] It is understandable that, in addition to automobile lighting, the light source device 20 can also be applied to a variety of different scenarios, such as indoor lighting, stage lighting, projection display, etc., and this embodiment does not limit this.

[0030] Specifically, the light source 21 is used to emit excitation light, and the light source 21 may be a laser light source 21, which 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.

[0031] In another embodiment, the light source 21 can be a light emitting diode (LED) light source, etc. The LED light source emits excitation light. 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.

[0032] Please continue reading Figure 2 The first wavelength conversion device 22 can be used to receive the excitation light and convert at least part of the excitation light into the first stimulated light. More specifically, the wavelength range of the excitation light can be 405nm-455nm. The first wavelength conversion device 22 receives the excitation light and emits the first stimulated light. The wavelength range of the first stimulated light can be 490nm-580nm. The unconverted excitation light is the first residual excitation light. The first wavelength conversion device 22 can reflect the first stimulated light and the first residual excitation light. Specifically, the first wavelength conversion device 22 can combine the first stimulated light and the first residual excitation light, and reflect them to the second wavelength conversion device 23 and / or the lens assembly 24.

[0033] In a more specific embodiment, the first wavelength conversion device 22 may include a first fluorescence conversion layer 221, a first reflection layer 222, and a first heat sink 223 stacked in sequence. The first fluorescence conversion layer 221 may include YAG:Ce phosphor, LuAG:Ce 3+ Phosphor, Lu3(Al,Ga)5O 12 :Ce 3+ Phosphor, β-SiAlON:Eu 2+ Phosphor, Lu3(Al,Ga)5O 12 :Ce 3+ At least one of phosphor, GAGG:Ce phosphor, GAG:Ce phosphor, YAGG:Ce phosphor and LuAGG:Ce phosphor. The first reflective layer 222 has characteristics such as high reflectivity and can include Ag 60 Cu 30 Sn 10 Layer, Ag 72 Cu 28 Layer, Ag85 Cu 15 Layer and Ag 92.5 Cu 7.5 At least one of the layers. The first heat sink 223 can be a copper heat sink, an aluminum heat sink, a tungsten-copper alloy heat sink, etc. The first heat sink 223 can directly dissipate the heat conducted by the first fluorescent conversion layer 221 and the first reflective layer 222 to the environment. Alternatively, the first heat sink 223 can be connected to other components such as a heat sink and a circuit board. The heat sink has a larger heat dissipation area. The first heat sink 223 can transfer heat to the heat sink and use the heat sink to dissipate heat.

[0034] The first fluorescence conversion layer 221 is disposed on the surface of the first reflection layer 222, and the first heat sink 223 is connected to the surface of the first reflection layer 222 away from the first fluorescence conversion layer 221. The excitation light passes through the first fluorescence conversion layer 221, and at least part of the excitation light is absorbed by the first fluorescence conversion layer 221 and emits the first converted light. The first converted light and the first remaining excitation light are reflected by the first reflection layer 222, pass through the first fluorescence conversion layer 221 again, and propagate to the second wavelength conversion device 23. The excitation light is converted twice in the first fluorescence conversion layer 221, and the two conversions can ensure that enough excitation light is absorbed and converted by the first fluorescence conversion layer 221. At the same time, when enough excitation light is excited, the first fluorescence conversion layer 221 can be set thinner, and the thinner first fluorescence conversion layer 221 can shorten the heat channel distance of the first wavelength conversion device 22 and accelerate the heat transmission efficiency in the first wavelength conversion device 22.

[0035] Please continue reading Figure 2, the first fluorescence conversion layer 221 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 221 can be a phosphor layer, the first fluorescence conversion layer 221 can be a yellow-green phosphor layer, and the wavelength range of the first converted light can be 490nm-580nm. The first reflection layer 222 is located in the optical path of the first converted light and the first residual excitation light. The first converted light and the first residual excitation light are emitted to the first reflection layer 222 together and reflected to the second wavelength conversion device 23 or the lens assembly 24. Since the heat of the excitation light is absorbed by the first fluorescence conversion layer 221, the heat is accumulated in the first fluorescence conversion layer 221. The first fluorescence conversion layer 221 transfers the heat to the first heat sink 223 through the first reflection layer 222. The first heat sink 223 can dissipate the heat to the environment, which plays a heat dissipation role to reduce the temperature of the first wavelength conversion device 22. The first heat sink 223 can prevent high temperature from affecting the fluorescence conversion of the first fluorescence conversion layer 221, and improve the fluorescence conversion efficiency of the first wavelength conversion device 22. Moreover, most of the heat of the excitation light has been absorbed by the first wavelength conversion device 22 and transmitted to the environment through the first heat sink 223, reducing the heat of the first excited light and the unconverted excitation light, thereby reducing the heat transmitted to the second wavelength conversion device 23 and ensuring the fluorescence conversion efficiency of the second wavelength conversion device 23.

[0036] In one embodiment, please refer to Figure 2 The incident angle of the excitation light emitted by the light source 21 into the first wavelength conversion device 22 is 0-45°. Figure 2 As shown by the angle a, Figure 2 L1 in the figure is the normal of the incident surface of the excitation light in the first wavelength conversion device 22, and the incident angle is the angle between the incident direction of the excitation light and the normal. The incident angle should not exceed 45°. Too large an 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, too large an 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 enable the excitation light to be absorbed by the first wavelength conversion device 22 and reflected smoothly, and will not interfere with the normal operation of the lens assembly 24.

[0037] In some embodiments of this application, please continue to refer to Figure 2, the second wavelength conversion device 23 is arranged on at least one side of the first wavelength conversion device 22, and the second wavelength conversion device 23 can be located in the optical path of the first residual excitation light and the first converted light reflected by the first wavelength conversion device 22. The second wavelength conversion device 23 is used to receive at least part of the first residual excitation light and at least part of the first converted light reflected by the first wavelength conversion device 22, and convert them into the second converted light. More specifically, under the fluorescence conversion of the second wavelength conversion device 23, at least part of the first residual excitation light is absorbed and converted, and the first residual excitation light that is not converted by the second wavelength conversion device 23 is the second residual excitation light. The second wavelength conversion device 23 is located on at least one side of the first wavelength conversion device 22. This configuration can separate the first wavelength conversion device 22 and the second wavelength conversion device 23, and can avoid most of the excitation light directly irradiating the second wavelength conversion device 23 to cause thermal damage. Because the second wavelength conversion device 23 is arranged in the exit optical path of the first wavelength conversion device 22, a small amount of excitation light is transmitted to the second wavelength conversion device 23, which can reduce the heat loss of the second wavelength conversion device 23. At the same time, this configuration can also shorten the distance between two excitations of the excitation light, reduce the loss caused by propagation, and reduce the volume of the light source device 20 to increase its scope of application.

[0038] More specifically, the wavelength range of the excitation light can be 405nm-455nm, the second wavelength conversion device 23 receives at least part of the first remaining excitation light and at least part of the first converted light, and emits the second converted light, the wavelength range of the second converted light is 590nm-680nm. The second wavelength conversion device 23 can reflect the second remaining excitation light, the second converted light and the remaining first converted light to the lens assembly 24. Among them, 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 22 can be 490nm-580nm, and the first converted light is yellow-green light. The remaining first converted light, the second converted light and the unconverted second remaining excitation light are combined to form white light with high brightness and high color rendering index>90, and the white light is transmitted to the lens assembly 24.

[0039] In one embodiment, please refer to Figure 2, the second wavelength conversion device 23 is arranged on two opposite sides of the first wavelength conversion device 22. The opposite sides of the first wavelength conversion device 22 can be an end of the first wavelength conversion device 22 that is arranged close to the light source 21 and an end of the first wavelength conversion device 22 that is arranged far from the light source 21. Due to the influence of factors such as the position relationship, the first residual excitation light reflected by the first wavelength conversion device 22 can be absorbed by the second wavelength conversion device 23, and then at least part of the first residual excitation light will be converted into the second converted light. In this embodiment, by arranging the second wavelength conversion device 23 on two opposite sides of the first wavelength conversion device 22, the excitation light first excites the first wavelength conversion device 22 to achieve a higher conversion efficiency, and at the same time scatters the laser to reduce the energy concentration of the light spot. The reflected first residual excitation light then excites the second wavelength conversion device 23, which reduces the irradiation intensity of the second wavelength conversion device 23 when the excitation light excites, which is conducive to reducing the thermal effect, and realizing the synergistic effect of the two types of fluorescence conversion of the first wavelength conversion device 22 and the second wavelength conversion device 23, thereby improving the conversion efficiency of the second wavelength conversion device 23.

[0040] More specifically, the second wavelength conversion device 23 can be arranged around the edge of the first wavelength conversion device 22. Specifically, the second wavelength conversion device 23 can be configured in a cone, a prism, a truncated cone, etc., which is not limited in this embodiment. The first wavelength conversion device 22, the second wavelength device and the lens assembly 24 are connected to each other to form a relatively closed space. The space can prevent the excitation light from leaking from the gap between the first wavelength conversion device 22, the second wavelength device and the lens assembly 24, effectively improving the energy utilization rate of the excitation light.

[0041] In some embodiments of this application, please continue to refer to Figure 2 , the normal direction of the first wavelength conversion device 22 (eg Figure 2 L1 in the figure) and the normal direction of the second wavelength conversion device 23 (such as Figure 2 The angle between L2) is 45°-75°. Figure 2 As shown in the angle b in the figure, the angle should not be set too large or too small. If the first wavelength conversion device 22 is set too small, the illumination range of the emitted light of the light source device 20 will be limited. If the angle is set too large, it will affect the second wavelength conversion device 23 receiving the first residual excitation light and the first converted light, which may cause the amount of the second converted light to be insufficient to meet subsequent requirements. The first wavelength conversion device 22 and the second wavelength conversion device 23 with appropriate angles can ensure the illumination range of the emitted light of the light source device 20 and ensure that the second wavelength conversion device 23 converts a sufficient amount of excitation light.

[0042] It can be understood that the first residual excitation light absorbed by the second wavelength conversion device 23 is reflected by the first wavelength conversion device 22, and the size of the projection area of ​​the second wavelength conversion device 23 toward the first wavelength conversion device 22 is negatively correlated with the amount of the first excitation light and the first converted light absorbed by the second wavelength conversion device 23. In other words, the larger the projection area of ​​the second wavelength conversion device 23 toward the first wavelength conversion device 22, the less the first residual excitation light and the first converted light are reflected by the first wavelength conversion device 22 into the second wavelength conversion device 23. The smaller the projection area of ​​the second wavelength conversion device 23 toward the first wavelength conversion device 22, the more the first residual excitation light and the first converted light are reflected by the first wavelength conversion device 22 into the second wavelength conversion device 23.

[0043] For further information, please refer to Figure 2 In this embodiment, the ratio of the first converted light to the second converted light can be changed by changing the angle between the normal direction of the first wavelength conversion device 22 and the normal direction of the second wavelength conversion device 23, and changing the projection area of ​​the second wavelength conversion device 23 toward the first wavelength conversion device 22. Different ratios of the first converted light and the second converted light form output light of different color temperatures. Exemplarily, by adjusting the angle between the normal direction of the first wavelength conversion device 22 and the normal direction of the second wavelength conversion device 23, white light of different color temperatures can be formed.

[0044] In a more specific embodiment, the second wavelength conversion device 23 may include a second fluorescence conversion layer 231, a second reflection layer 232 and a second heat sink 233 stacked in sequence. The second fluorescence conversion layer 231 may include CaAlS iN3:Eu 2+ Phosphor, (Ca, Sr)AlS iN3:Eu 2+ Phosphor, CaAl SiN3:Eu 2+ Phosphor, K2Si F6:Mn 4+ At least one of Ag phosphor, YAG:Ce phosphor, LuAG:Ce phosphor, GAGG:Ce phosphor, GAG:Ce phosphor, YAGG:Ce phosphor and LuAGG:Ce phosphor. The second reflective layer 232 has characteristics such as high reflectivity and can include Ag 60 Cu 30 Sn 10 Layer, Ag 72 Cu 28 Layer, Ag 85 Cu 15 Layer and Ag 92.5 Cu 7.5The second heat sink 233 may be a copper-based ceramic composite material or an aluminum-based ceramic composite material. Further, the second heat sink 233 may include diamond powder, graphite sheet, carbon fiber, silicon carbide, and silicon nitride. The thermal conductivity of the second heat sink 233 is greater than 300W / (k·m), and the second heat sink 233 can dissipate heat quickly. The second fluorescent conversion layer 231 is disposed on the surface of the second reflective layer 232, and the second heat sink 233 is disposed on the surface of the second reflective layer 232 away from the second fluorescent conversion layer 231.

[0045] The excitation light passes through the second fluorescence conversion layer 231, and at least part of the first residual excitation light is absorbed and converted by the second fluorescence conversion layer 231 and emits the second converted light. The second converted light and the unconverted first residual excitation light are reflected by the second reflection layer 232, pass through the second fluorescence conversion layer 231 again, and propagate to the second wavelength conversion device 23. The first residual excitation light is converted twice in the second fluorescence conversion layer 231, and the two conversions can ensure that enough excitation light is absorbed and converted by the second fluorescence conversion layer 231. At the same time, when enough excitation light is excited, the second fluorescence conversion layer 231 can be set to be thinner, and the thinner second fluorescence conversion layer 231 can shorten the heat channel distance of the second wavelength conversion device 23 and accelerate the heat transfer efficiency in the second wavelength conversion device 23.

[0046] In another embodiment, the second wavelength conversion device is further used to absorb the first converted light with a wavelength range of less than 500 nm and convert it into the second converted light. Exemplarily, the wavelength range of the first converted light may be 490 nm-580 nm, and the first converted light with a wavelength range of 490 nm-500 nm may also be absorbed by the second wavelength conversion device and converted into the second converted light. This arrangement can ensure that a sufficient amount of the second converted light is formed.

[0047] Please continue reading Figure 2, the second fluorescent conversion layer 231 can receive at least part of the first residual excitation light and at least part of the first converted light, and convert them into the second converted light. Further, the second fluorescent conversion layer 231 can be a fluorescent powder layer, the second fluorescent conversion layer 231 can be a red fluorescent powder layer, and the wavelength range of the second converted light is 590nm-680nm. The second reflective layer 232 is located in the optical path of the second converted light and the unconverted first excitation light. At least part of the first residual excitation light is absorbed and converted by the second fluorescent conversion layer 231, and the unconverted first residual excitation light is the second residual excitation light. The first converted light, the second converted light, and the unconverted first residual excitation light and / or the second residual excitation light pass through the second fluorescent conversion layer 231 and are emitted to the second reflective layer 232, and the second reflective layer 232 is reflected to the lens assembly 24. During this period, the heat of the excitation light is transferred to the second reflective layer 232 and the second fluorescent conversion layer 231, and the heat is accumulated in the second reflective layer 232 and the second fluorescent conversion layer 231, and finally transferred to the second heat sink 233. The second heat sink 233 can dissipate the heat to the environment, which plays a role in heat dissipation to reduce the temperature of the second wavelength conversion device 23. The second heat sink 233 can prevent heat from accumulating and not being conducted away, thereby preventing the second fluorescence conversion layer 231 from being thermally quenched and failing, and improve the fluorescence conversion efficiency of the second wavelength conversion device 23. In addition, most of the heat of the excitation light has been absorbed by the first wavelength conversion device 22, ensuring the fluorescence conversion efficiency of the second wavelength conversion device 23.

[0048] It is understandable that in this embodiment, the first fluorescent conversion layer 221 and the second fluorescent conversion layer 231 of different materials or sizes can be configured to change the ratio of the excitation light, the first converted light, and the second converted light to form the desired output light. Exemplarily, the first fluorescent conversion layer 221 includes yellow fluorescent powder and green fluorescent powder. The amount of yellow fluorescent powder in this embodiment can be 1-2 times the amount of green fluorescent powder. The first fluorescent conversion layer 221 can be configured with the amount of yellow fluorescent powder being 2 times the amount of green fluorescent powder, thereby increasing the amount of yellow light to change the wavelength peak of the first converted light to form output light with different wavelength peaks or color temperatures.

[0049] In some other cases, the light source device 20 may also be provided with a plurality of heat dissipation devices (not shown in the figure). The heat dissipation device is provided on the surface of the first heat sink 223 away from the first fluorescent conversion layer 221, and / or the heat dissipation device is provided on the surface of the second heat sink 233 away from the second fluorescent conversion layer 231. The heat dissipation device includes but is not limited to heat dissipation fins, heat dissipation fans, liquid cooling heat dissipation devices, etc., and is not limited thereto. The heat dissipation device can absorb and transfer the heat of the first heat sink 223 and / or the second heat sink 233, reduce the operating temperature of the light source device 20, and further improve its light output quality.

[0050] In some embodiments of this application, please continue to refer to Figure 2 The lens assembly 24 is used to transmit the first stimulated light and the second stimulated light, and reflect at least part of the first residual excitation light and the second residual excitation light. The lens assembly 24 reflects at least part of the unconverted first residual excitation light and the second residual excitation light to the first wavelength conversion device 22 and / or the second wavelength conversion device 23, and the unconverted excitation light can be reabsorbed and excited. The lens assembly 24 effectively reduces the emitted excitation light and reduces the energy loss of the light source 21.

[0051] The excitation light can be blue light, and the excitation light with a large incident angle is directly emitted along the optical axis of the light source device 20. Under the influence of factors such as the emission angle, this part of the excitation light cannot be combined with the first stimulated light and the second stimulated light, which will also bring certain safety hazards. The lens assembly 24 in this embodiment is used to transmit the excitation light with an incident angle greater than or equal to 45°, and reflect the excitation light with an incident angle less than 45°. Among them, the excitation light includes the first residual excitation light and the second residual excitation light. Exemplarily, the lens assembly 24 is configured with an angle selection lens, and the lens assembly 24 can selectively allow a certain band of light within a specific angle range to pass, that is, the first stimulated light, the second stimulated light, and the excitation light with an incident angle greater than or equal to 45°. At the same time, the lens assembly 24 can also limit the emission of light at other angles and / or other bands, that is, the excitation light with an incident angle less than 45°. When the excitation light with a small incident angle is emitted into the lens assembly 24, the lens assembly 24 re-reflects the excitation light to the first wavelength conversion device 22 or the second wavelength conversion device 23. The lens assembly 24 can prevent the excitation light from being emitted directly along the optical axis of the light source device 20 , that is, the excitation light cannot be combined with the first converted light and the second converted light, effectively preventing the safety hazard caused by the blue laser being emitted close to the vertical lens assembly 24 .

[0052] In one embodiment, please refer to Figure 2The lens assembly 24 may include a light incident surface 241, a light emitting surface 242, and a side surface 243, which are opposite to each other. The side surface 243 is connected between the light incident surface 241 and the light emitting surface 242. The light incident surface 241 may be a surface of the lens assembly 24 close to the first wavelength conversion device 22, and the light emitting surface 242 may be a surface opposite to the light incident surface 241. Further, the light incident surface 241 is arranged opposite to the first wavelength conversion device 22, the second wavelength conversion device 23 is arranged on at least one side of the first wavelength conversion device 22, and the second wavelength conversion device 23 is located between the lens assembly 24 and the first wavelength conversion device 22. Under the influence of the relative positional relationship among the lens assembly 24, the first wavelength conversion device 22, and the second wavelength conversion device 23, the first wavelength conversion device 22 reflects the first converted light and the first residual excitation light to the second wavelength conversion device 23, and the second wavelength conversion device 23 reflects the remaining first converted light, the second converted light, and the second residual excitation light to the lens assembly 24. Furthermore, part of the unexcited first residual excitation light and / or the second residual excitation light can propagate among the three and be repeatedly absorbed and excited. The lens assembly 24, the first wavelength conversion device 22 and the second wavelength conversion device 23 coordinated in this positional relationship can utilize more energy of the excitation light and improve the energy utilization rate of the excitation light.

[0053] In some embodiments of this application, please continue to refer to Figure 2 , the light source 21 can be arranged outside the first wavelength conversion device 22 and the second wavelength conversion device 23. This configuration can prevent the heat generated by the light source 21 from being transferred to the first wavelength conversion device 22 and the second wavelength conversion device 23, thereby reducing the heat dissipation pressure of the first wavelength conversion device 22 and the second wavelength conversion device 23. A through hole 244 is provided on the side 243 of the lens assembly 24. The through hole 244 can penetrate the side 243 of the lens assembly 24. The through hole 244 is arranged opposite to the light source 21. The excitation light emitted by the light source 21 is incident on the first wavelength conversion device 22 through the through hole 244. The through hole 244 can not only ensure that the excitation light is emitted to the first wavelength conversion device 22, but also restrict the aperture of the excitation light incident on the first wavelength conversion device 22, thereby reducing the imaging range of the excitation light on the first fluorescent conversion layer 221. A smaller imaging range can make the reflection direction of the excitation light and the first stimulated light more controllable, thereby improving the reliability of the light source device 20.

[0054] In some embodiments of the application, when the through hole 244 can be set on the light incident surface 241, the through hole 244 can be set in the edge area of ​​the lens component 24. Under the influence of the positional relationship between the first wavelength conversion device 22 and the second wavelength conversion device 23, less excitation light is emitted to the edge area of ​​the lens component 24, thereby avoiding a large amount of excitation light from being emitted from the through hole 244 to the outside of the light source device 20.

[0055] Understandable, see Figure 3 In addition to being provided on the side surface 243, the through hole 244 can be provided on the light incident surface 241 and penetrate the light incident surface 241 and the light emitting surface 242 of the lens assembly 24. Furthermore, the size and relative position of the through hole 244 can be selected and designed according to the size, shape and relative position of the first wavelength conversion device 22 and the second wavelength conversion device 23, and this embodiment does not limit this.

[0056] Understandable, please continue to read Figure 2 , the excitation light can be blue light, which is first absorbed by the first fluorescent conversion layer 221 and emitted to form the first converted light. The first fluorescent conversion layer 221 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 high fluorescence conversion efficiency. After being reflected by the first wavelength conversion device 22, the first residual excitation light is then excited by the second fluorescent conversion layer 231 to form the second converted light. The second fluorescent conversion layer 231 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 231 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, which realizes 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 20, and finally realizing the full-spectrum laser illumination of the light source device 20. During this period, the lens assembly 24 can reflect the excitation light with a small incident angle to prevent the excitation light from being directly emitted to the outside world to cause safety hazards.

[0057] The solution of the present application is described in more detail below in conjunction with specific embodiments.

[0058] Example 1

[0059] The light source is a blue laser, and the wavelength of the excitation light emitted by the blue laser is 445 nm. The light guide includes a high-reflection condenser. The first fluorescent conversion layer includes LuAG:Ce 3+ The phosphor powder reflects the first converted light with a wavelength peak of 520 nm. The second phosphor conversion layer includes CaAl SiN3:Eu 2+ The phosphor has a second stimulated light with a wavelength peak of 620 nm. The first stimulated light, the second stimulated light and the remaining excited photosynthetic light form white light with high brightness and a high color rendering index of more than 90, and the white light is emitted outside the light source device.

[0060] Example 2

[0061] The light source is a blue laser, and the wavelength of the excitation light emitted by the blue laser is 455 nm. The light guide includes a high-reflection condenser. The first fluorescent conversion layer includes Lu3(Al,Ga)5O 12 :Ce3+ The phosphor powder reflects the first converted light with a wavelength peak of 510 nm. The second phosphor conversion layer includes (Ca, Sr)Al SiN3:Eu 2+ The phosphor has a second stimulated light with a wavelength peak of 650 nm. The first stimulated light, the second stimulated light and the remaining excited photosynthetic light form white light with high brightness and a high color rendering index of more than 90, and the white light is emitted outside the light source device.

[0062] Example 3

[0063] The light source is a blue laser, and the wavelength of the excitation light emitted by the blue laser is 445 nm. The light guide includes a high-reflection focusing cover. The first fluorescent conversion layer includes β-SiAlON:Eu 2+ The phosphor powder reflects the first converted light with a wavelength peak of 530 nm. The second phosphor conversion layer includes CaAlS iN3:Eu 2+ Phosphor and K2S i F6:Mn 4+ The phosphor has a second stimulated light with a wavelength peak of 620 nm. The first stimulated light, the second stimulated light and the remaining excited photosynthetic light form white light with high brightness and a high color rendering index of more than 90, and the white light is emitted outside the light source device.

[0064] Example 4

[0065] The light source is a blue laser, and the wavelength of the excitation light emitted by the blue laser is 445 nm. The light guide includes a high-reflection focusing cover. The first fluorescent conversion layer includes Lu3(Al,Ga)5O 12 :Ce 3+ The phosphor powder reflects the first converted light with a wavelength peak of 520 nm. The second phosphor conversion layer includes CaAl SiN3:Eu 2+ Phosphor and K2S iF6:Mn 4+ The phosphor has a second stimulated light with a wavelength peak of 620 nm. The first stimulated light, the second stimulated light and the remaining excited photosynthetic light form white light with high brightness and a high color rendering index of more than 90, and the white light is emitted outside the light source device.

[0066] The present embodiment provides a light source device 20, wherein the light source 21 emits excitation light, and the excitation light passes through the first wavelength conversion device 22 and the second wavelength conversion device 23. The excitation light is excited by the first wavelength conversion device 22 and the second wavelength conversion device 23 respectively, which can disperse the heat generated when the excitation light is excited, avoid the temperature of the first wavelength conversion device 22 and the second wavelength conversion device 23 from rising sharply, and ensure the conversion efficiency of the first wavelength conversion device 22 and the second wavelength conversion device 23. The second wavelength conversion device 23 is located on one side of the first wavelength conversion device 22, which can shorten the distance between the two excitations of the excitation light, reduce the loss caused by propagation, and reduce the volume of the light source device 20 to improve its application range. The first excited light, the second excited light, and the remaining unexcited excitation light compensate each other, which is conducive to improving the color rendering index of the emitted light of the light source device 20, and realizing the high color rendering index of the light source device 20>90 and the full spectrum lighting requirements. During this period, the lens assembly 24 can reflect part of the unexcited excitation light to avoid the safety hazards caused by direct excitation light.

[0067] The lighting device 10 using the light source device 20 solves the problem of heat accumulation limiting the power of the light source device 20, and the lighting device 10 can use a higher power light source device 20. The lighting light of the light source device 20 meets the requirements of high color rendering index>90 and high lumen, and the light source device 20 can improve the lighting effect.

[0068] 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, the first wavelength conversion device is used to receive the excitation light and convert at least part of the excitation light into a first converted light, the unconverted 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 second wavelength conversion device, disposed on at least one side of the first wavelength conversion device, the second wavelength conversion device being used to receive at least a portion of the first remaining excitation light and at least a portion of the first converted light, and convert the first remaining excitation light into a second converted light, the first remaining excitation light that has not been converted is the second remaining excitation light, and the second wavelength conversion device reflects the second remaining excitation light, the second converted light, and the remaining first converted light; as well as A lens assembly is used for transmitting the first stimulated light and the second stimulated light and reflecting at least a portion of the first residual excitation light and the second residual excitation light.

2. The light source device according to claim 1, characterized in that: The second wavelength conversion device is disposed on two opposite sides of the first wavelength conversion device.

3. The light source device according to claim 1, characterized in that: The angle between the normal direction of the first wavelength conversion device and the normal direction of the second wavelength conversion device is 45°-75°.

4. The light source device according to claim 1, characterized in that: The lens assembly is used to transmit the excitation light with an incident angle greater than or equal to 45°, and reflect the excitation light with an incident angle less than 45°.

5. The light source device according to claim 1, characterized in that: The lens assembly includes a light incident surface and a light emitting surface facing each other and a side surface connected between the light incident surface and the light emitting surface. The light incident surface is arranged opposite to the first wavelength conversion device. The second wavelength conversion device is arranged on at least one side of the first wavelength conversion device and is located between the lens assembly and the first wavelength conversion device.

6. The light source device according to claim 5, characterized in that: The side surface 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.

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 0-45°.

8. The light source device according to claim 1, characterized in that: The first wavelength conversion device includes a first fluorescence conversion layer, a first reflection layer and a first heat sink which are stacked in sequence.

9. The light source device according to claim 1, characterized in that: The second wavelength conversion device includes a second fluorescence conversion layer, a second reflection layer and a second heat sink which are stacked in sequence.

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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