Light source device and lighting system

Abstract

The utility model belongs to the technical field of light sources, and provides a light source device which comprises a metal shell, a fluorescent crystal lens and a light-emitting chip, the metal shell comprises a tube base and a tube cap, the tube cap covers the tube base to form an installation space, the tube cap is provided with a light hole, and the fluorescent crystal lens is located in the installation space. The fluorescent crystal lens is connected to the tube cap, is thermally coupled with the tube cap and covers the light hole, and the light-emitting chip is arranged on the tube base and is used for emitting exciting light towards the fluorescent crystal lens. According to the light source device provided by the embodiment of the invention, the light-emitting chip dissipates heat through the heat sink, the fluorescent crystal lens is arranged on the pipe cap and is thermally coupled with the pipe cap, heat dissipation is carried out through the pipe cap, heat dissipation paths of the fluorescent crystal lens and the pipe cap are different, heat accumulation of the heat sink is reduced, heat dissipation efficiency is improved, long-time work of the light source device is facilitated, and the service life is prolonged.

Description

Technical Field

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

[0002] Semiconductor lighting has become the most efficient artificial light source for photoelectric conversion, offering significant energy savings. Currently, commercial white LEDs primarily utilize a GaN-based blue LED to excite yellow phosphor. This technology offers advantages in that the manufacturing process for both blue LEDs and yellow phosphors is mature and relatively low-cost. However, its spectrum differs significantly from the full spectrum of natural sunlight, resulting in a low color rendering index (CRI), making it difficult to meet the demands of high-quality lighting. Furthermore, phosphor aging reduces the lifespan and stability of white LEDs.

[0003] Existing phosphor-conversion laser lighting or display technologies utilize laser light sources that remotely excite fluorescent materials. In remote-excitation laser lighting, heat accumulates in the fluorescent material under continuous laser excitation, making it susceptible to damage from the high-energy laser. Furthermore, the laser chip generates significant heat during continuous operation. In related technologies, both the fluorescent ceramic and the laser chip dissipate this heat through heat sinks, resulting in low heat dissipation efficiency and poor long-term operation. Utility Model Content

[0004] The embodiments of the present application provide a light source device and a lighting system to at least partially improve the above-mentioned technical problems.

[0005] In a first aspect, an embodiment of the present application provides a light source device, comprising a metal shell, a fluorescent crystal lens, and a light-emitting chip, wherein the metal shell comprises a tube seat and a tube cap, wherein the tube cap covers the tube seat to form an installation space, wherein the tube cap is provided with a light-transmitting hole, wherein the fluorescent crystal lens is located within the installation space, wherein the fluorescent crystal lens is connected to and thermally coupled with the tube cap, and covers the light-transmitting hole, and wherein the light-emitting chip is arranged on the tube seat and is used to emit excitation light toward the fluorescent crystal lens.

[0006] In some embodiments, the metal housing further includes a mounting seat connected to the tube holder and located in the mounting space. The light-emitting chip is disposed on the mounting seat, and the fluorescent crystal lens is spaced apart from the light-emitting chip.

[0007] In some embodiments, the light source device further includes a heat sink, which is disposed between the mounting base and the light-emitting chip.

[0008] In some embodiments, the light source device further includes a photodiode, which is disposed on the tube holder and located in the installation space.

[0009] In some embodiments, a notch is provided on the surface of the tube holder facing the installation space, and the photodiode is arranged in the notch so that the axial direction of the photodiode and the optical axis direction of the excitation light emitted by the light-emitting chip have an angle that is less than 90°.

[0010] In some embodiments, the light source device further includes a first pin and a second pin, wherein the first pin passes through the metal stem and is electrically connected to the light-emitting chip, and the second pin is electrically connected to the stem and to the photodiode.

[0011] In some embodiments, the tube cap includes a base, a side tube and a top plate, the base is arranged on the tube seat, the side tube is connected between the base and the top plate and encloses the installation space, the light-transmitting hole is opened on the top plate, and the fluorescent crystal lens is arranged on the top plate and covers the light-transmitting hole.

[0012] In some embodiments, the fluorescent crystal lens is bonded to the top plate.

[0013] In some embodiments, the fluorescent crystal lens is a single crystal of garnet phase or transparent ceramics. The fluorescent crystal lens receives the excitation light emitted by the light-emitting chip and converts it into fluorescence. The wavelength band of the fluorescence is 520nm-550nm.

[0014] In a second aspect, the present application also provides a lighting system, comprising the above-mentioned light source device.

[0015] In the light source device and lighting system provided in the embodiments of the present application, the light-emitting chip dissipates heat through the tube holder, and the fluorescent crystal lens is arranged on the tube cap and thermally coupled with the tube cap, and dissipates heat through the tube cap. The two have different heat dissipation paths, which reduces heat accumulation in the heat sink, improves heat dissipation efficiency, facilitates long-term operation of the light source device, and increases service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments 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 This is a structural schematic diagram of a light source device proposed in an embodiment of the present application. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0019] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," and "fixed" should be interpreted broadly. For example, these terms may refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; internal communication between two components; surface contact only; or surface contact through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0020] In addition, the terms "first", "second", etc. are only used to distinguish descriptions and should not 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 embodiment or example are included in at least one embodiment or example of the present application. In this 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 this application and the features of the different embodiments or examples, unless they are contradictory.

[0021] Example 1

[0022] See Figure 1 This embodiment provides a light source device 10, including a metal shell 15, a fluorescent crystal lens 40 and a light-emitting chip 50, wherein the light-emitting chip 50 is used to emit excitation light, and the fluorescent crystal lens 40 is used to receive the excitation light and convert it into fluorescent light.

[0023] The metal housing 15 includes a tube base 20 and a tube cap 30. Both the tube base 20 and the tube cap 30 are made of metal, which helps improve the thermal conductivity and heat dissipation of the metal housing 15. The tube cap 30 is a generally cylindrical structure that covers the tube base 20 to form an installation space 25. The tube cap 30 and the tube base 20 can be integrally connected and sealed by welding or other means. The tube cap 30 defines a light-transmitting hole 34 for transmitting the fluorescent light converted by the fluorescent crystal lens 40. The cross-sectional shape of the light-transmitting hole 34 can be various, such as circular, rectangular, or elliptical, and this embodiment does not limit this.

[0024] In this embodiment, the tube cap 30 includes a base 31, side tubes 32, and a top plate 33. The base 31 is disposed on the surface of the tube base 20 and connected to the tube base 20. The side tubes 32 are connected between the base 31 and the top plate 33 to form the installation space 25. A light-transmitting hole 34 is defined in the top plate 33. The base 31, side tubes 32, and top plate 33 can all be made of metal, thereby improving the thermal conductivity and heat dissipation efficiency of the tube cap 30. The base 31, side tubes 32, and top plate 33 can be integrally formed or connected in other ways, which is not limited in this embodiment.

[0025] The fluorescent crystal lens 40 is located in the installation space 25. The fluorescent crystal lens 40 can receive the excitation light and convert it into fluorescence. At the same time, it can also shape the light spot of the converted fluorescence to form the required light spot shape. The fluorescent crystal lens 40 can be of the molecular formula A3D 5-x C x O 12 :Ce 3+ The material is made of a material, wherein A can be Y, Gd, Tb, Lu, Ca, etc., D can be Al, Si, Mg, Ga, etc., and C can be Al, Sc, Ga, Ge, Zr, Hf, etc., and 0≤x≤5. Ce can be doped to replace A, and the doping concentration can be, for example, in the range of 0.02at% to 1.0at%.

[0026] Cerium-doped lutetium aluminum garnet material has excellent luminescence properties. Cerium ions act as luminescence centers in the garnet structure, which can absorb ionizing radiation and emit phosphorescence. Its luminescence peak usually varies depending on the doping ratio and preparation conditions. In this embodiment, by controlling the x value, the luminescence peak of the cerium-doped lutetium aluminum garnet material can be controlled, thereby controlling the wavelength range of the excitation light converted therefrom. In some embodiments, the fluorescent crystal lens 40 receives the excitation light emitted by the light-emitting chip 50 and converts it into fluorescence. The wavelength range of the fluorescence converted by the fluorescent crystal lens 40 can be, for example, 520nm-550nm. In this embodiment, the fluorescent crystal lens 40 is YAG:Ce 3+ Transparent ceramic, and used to emit fluorescence with a wavelength of 540nm.

[0027] It should be noted that, depending on different requirements for fluorescence, the fluorescent crystal lens 40 can be configured as a concave lens, a convex lens, a plano-convex lens, a plano-concave lens, etc. In this embodiment, the fluorescent crystal lens 40 is a convex lens, which can converge light and make the emitted light more concentrated.

[0028] The fluorescent crystal lens 40 is connected to the tube cap 30 and thermally coupled thereto, i.e., a heat flow path is established between the fluorescent crystal lens 40 and the tube cap 30, allowing heat generated by the fluorescent crystal lens 40 during operation to be dissipated through the tube cap 30. In this embodiment, the fluorescent crystal lens 40 can be located within the installation space 25 and disposed on the top plate 33, covering the light transmission hole 34. Specifically, the fluorescent crystal lens 40 can be bonded to the top plate 33 using low-melting-point glass adhesive, sealing and covering the light transmission hole 34. In this way, the fluorescent light converted by the fluorescent crystal lens 40 can be emitted through the light transmission hole 34.

[0029] The light-emitting chip 50 is disposed on the tube base 20 and is used to emit excitation light toward the fluorescent crystal lens 40. The light-emitting chip 50 can be an LD blue laser chip, which is used to emit blue light with a wavelength of 455nm as the excitation light. The heat generated by the light-emitting chip 50 during operation can pass through the tube base 20 and be dissipated to the outside.

[0030] In some embodiments, the light source device may further include a heat sink 22, which is disposed between the tube base 20 and the light-emitting chip 50, and is located within the installation space 25. The heat sink 22 may be made of a material with a high thermal conductivity coefficient to improve thermal conductivity. In a more specific embodiment, the heat sink 22 may be made of a copper-based composite material, which may be, for example, a copper alloy containing diamond particles. The copper-based composite material not only has excellent thermal conductivity and can effectively transfer heat, but is also electrically conductive, making it easier to install and connect the light-emitting chip 50. Of course, in some other embodiments, the heat sink 22 may also be made of other materials such as stainless steel, which is not limited in this embodiment.

[0031] In this embodiment, a gap exists between the heat sink 22 and the fluorescent crystal lens 40. This means that heat generated by the fluorescent crystal lens 40 is not directly transferred to the heat sink 22. Therefore, the heat sink 22 only needs to conduct heat generated by the light-emitting chip 50. Therefore, heat accumulation on the heat sink 22 is prevented, thereby ensuring the service life of the light-emitting chip 50. Furthermore, because heat from the fluorescent crystal lens 40 is dissipated separately through the tube cap 30, heat accumulation is less likely to occur within the fluorescent crystal lens 40. This prevents aging of the fluorescent ceramic within the fluorescent crystal lens 40 and extends the service life of the fluorescent crystal lens 40.

[0032] In this embodiment, the metal housing 15 further includes a mounting base 21, which can be made of the same material as the tube base 20, such as metal. The mounting base 21 is connected to the tube base 20 and is located within the mounting space 25. The heat sink 22 is disposed on the mounting base 21, and the light-emitting chip 50 is disposed on the heat sink 22 and spaced apart from the tube base 20. The advantage of this arrangement is that the heat generated by the light-emitting chip 50 will first pass through the heat sink 22. Since the heat sink 22 has better thermal conductivity, the heat generated by the light-emitting chip 50 can be quickly transferred outward to the heat sink 22, and then transferred to the mounting base 21 and the tube base 20 for dissipation, thereby avoiding heat accumulation. Since there is a gap between the light-emitting chip 50 and the tube base 20, the heat from the tube base 20 will not interfere with the light-emitting chip 50 during the heat dissipation process.

[0033] In this embodiment, the optical axis of the excitation light emitted by the light-emitting chip 50 can also be coaxial with the central axis of the fluorescent crystal lens 40. In other embodiments, the optical axis of the excitation light emitted by the light-emitting chip 50 can be eccentric with the central axis of the fluorescent crystal lens 40. The advantage of this arrangement is that when the excitation light emitted by the light-emitting chip 50 is converted into fluorescent light through the fluorescent crystal lens 40, the unconverted excitation light will not directly affect the light-emitting slot of the light-emitting chip 50 when it returns through the fluorescent crystal lens 40, thereby reducing the return loss of the light-emitting component.

[0034] In this embodiment, the light source device 10 further includes a photodiode 60, which is disposed on the tube base 20 and located within the mounting space 25. The photodiode 60 is used to collect light reflected by the fluorescent crystal lens 40, determine the light intensity, and further determine the current operating state of the light emitting chip 50.

[0035] To prevent the photodiode 60 from affecting the operation of the light-emitting chip 50, in this embodiment, the axial direction of the photodiode 60 forms an angle with the optical axis of the excitation light emitted by the light-emitting chip 50, and the angle is less than 90°. In other words, the axial direction of the photodiode 60 is tilted relative to the optical axis of the excitation light emitted by the light-emitting chip 50. With this arrangement, the light beam returning from the fluorescent crystal lens 40 is incident on the photodiode 60 at an angle, avoiding any impact on the excitation light emitted by the light-emitting chip 50.

[0036] Specifically, in this embodiment, a notch 23 is provided on the surface of the tube holder 20 facing the installation space 25, and the photodiode 60 is arranged in the notch 23. The notch 23 is arranged in a form inclined relative to the surface of the tube holder 20 facing the installation space 25. After the photodiode 60 is arranged in the notch 23, the axial direction of the photodiode 60 has an angle with the optical axis direction of the excitation light emitted by the light-emitting chip 50, and the angle is less than 90°.

[0037] The light source device 10 further includes a first pin 80 and a second pin 70 . The first pin 80 passes through the metal stem 20 and is directly electrically connected to the light emitting chip 50 . The second pin 70 is electrically connected to the stem 20 and the photodiode 60 .

[0038] In the light source device 10 provided in this embodiment, the light-emitting chip 50 dissipates heat through the heat sink 22, and the fluorescent crystal lens 40 is arranged on the tube cap 30 and thermally coupled with the tube cap 30, and dissipates heat through the tube cap 30. The heat dissipation paths of the two are different, which reduces the heat accumulation of the heat sink 22 and improves the heat dissipation efficiency, which is beneficial to the long-term operation of the light source device 10 and increases the service life.

[0039] Example 2

[0040] Please continue reading Figure 1 This embodiment provides a light source device 10, which differs from the embodiment 1 in that the material of the fluorescent crystal lens 40 is different. For the same parts, please refer to the content of the embodiment 1 and will not be repeated here.

[0041] In this embodiment, the fluorescent crystal lens 40 is a single crystal structure of garnet phase. Specifically, the fluorescent crystal lens 40 is made of LuAG:Ce 3+ , wherein the Ce doping concentration is 0.025at%, and is used to emit fluorescence with a wavelength of 520nm.

[0042] In the light source device 10 provided in this embodiment, the light-emitting chip 50 dissipates heat through the heat sink 22, and the fluorescent crystal lens 40 is arranged on the tube cap 30 and thermally coupled with the tube cap 30, and dissipates heat through the tube cap 30. The heat dissipation paths of the two are different, which reduces the heat accumulation of the heat sink 22 and improves the heat dissipation efficiency, which is beneficial to the long-term operation of the light source device 10 and increases the service life.

[0043] Example 3

[0044] Please continue reading Figure 1 This embodiment provides a light source device 10, which differs from the embodiment 1 in that the material of the fluorescent crystal lens 40 is different. For the same parts, please refer to the content of the embodiment 1 and will not be repeated here.

[0045] In this embodiment, the fluorescent crystal lens 40 is a single crystal structure of garnet phase. Specifically, the fluorescent crystal lens 40 adopts GAGG:Ce 3+ , wherein the Ce doping concentration is 0.025at%, and is used to emit fluorescence with a wavelength of 550nm.

[0046] In the light source device 10 provided in this embodiment, the light-emitting chip 50 dissipates heat through the heat sink 22, and the fluorescent crystal lens 40 is arranged on the tube cap 30 and thermally coupled with the tube cap 30, and dissipates heat through the tube cap 30. The heat dissipation paths of the two are different, which reduces the heat accumulation of the heat sink 22 and improves the heat dissipation efficiency, which is beneficial to the long-term operation of the light source device 10 and increases the service life.

[0047] The present application also provides a lighting system, including the above-mentioned light source device 10, for generating lighting light, wherein the light source device 10 can be the light source device 10 in any of the above-mentioned embodiments, which is not limited here.

[0048] The above embodiments 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 embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. 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 embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A light source device, characterized in that: include: A metal housing, the metal housing comprising a tube base and a tube cap, the tube cap covering the tube base to form an installation space, the tube cap having a light-transmitting hole; a fluorescent crystal lens, the fluorescent crystal lens being located in the installation space, the fluorescent crystal lens being connected to the tube cap and thermally coupled with the tube cap, and covering the light transmission hole; as well as A light-emitting chip is arranged on the tube seat and is used to emit excitation light toward the fluorescent crystal lens.

2. The light source device according to claim 1, wherein The metal shell further includes a mounting seat, which is connected to the tube seat and is located in the mounting space. The light-emitting chip is arranged on the mounting seat, and the fluorescent crystal lens is spaced apart from the light-emitting chip.

3. The light source device according to claim 2, wherein: The light source device further includes a heat sink, which is arranged between the mounting base and the light-emitting chip.

4. The light source device according to claim 1, wherein It also includes a photodiode, which is arranged on the tube base and located in the installation space.

5. The light source device according to claim 4, wherein: A notch is provided on the surface of the tube holder facing the installation space, and the photodiode is arranged in the notch so that the axial direction of the photodiode and the optical axis direction of the excitation light emitted by the light-emitting chip form an angle that is less than 90°.

6. The light source device according to claim 4, wherein: The light source device further includes a first pin and a second pin. The first pin passes through the tube holder and is electrically connected to the light-emitting chip. The second pin is electrically connected to the tube holder and is electrically connected to the photodiode.

7. The light source device according to claim 1, wherein The tube cap includes a base, a side tube and a top plate. The base is arranged on the tube seat. The side tube is connected between the base and the top plate and encloses the installation space. The light-transmitting hole is opened on the top plate. The fluorescent crystal lens is arranged on the top plate and covers the light-transmitting hole.

8. The light source device according to claim 7, wherein: The fluorescent crystal lens is bonded to the top plate.

9. The light source device according to claim 1, wherein The fluorescent crystal lens is a single crystal of garnet phase or transparent ceramics. The fluorescent crystal lens receives the excitation light emitted by the light-emitting chip and converts it into fluorescence. The wavelength band of the fluorescence is 520nm-550nm.

10. A lighting system, characterized in that: The device comprises at least one light source device according to claims 1-9.

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