CN114578575A

CN114578575A - Light source device

Info

Publication number: CN114578575A
Application number: CN202011388056.0A
Authority: CN
Inventors: 唐怀; 段艳松
Original assignee: Shenzhen Zhongguang Industrial Technology Research Institute
Current assignee: Shenzhen Appotronics Corp Ltd
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2022-06-03
Also published as: WO2022116631A1

Abstract

The application discloses a light source device. The light source device includes: the device comprises a tube shell, a transparent cover plate, a wavelength conversion device, a light source module and an annular reflecting piece, wherein the transparent cover plate, the wavelength conversion device, the light source module and the annular reflecting piece are arranged on the tube shell in a covering mode, and a sealed space is formed by the tube shell and the transparent cover plate; the wavelength conversion device is arranged on the transparent cover plate; the light source module is positioned in the sealed space and used for emitting light beams; the annular reflecting member is located in the sealed space and includes an annular reflecting surface for reflecting the light beam to the wavelength conversion device. In this application, the light beam that the light source module sent reflects wavelength conversion device through cyclic annular reflection part on, can form the circular facula of gaussian distribution, and the light source device's of this application simple structure, the size is less.

Description

Light source device

Technical Field

The present application relates to the field of optical technology, and in particular, to a light source device.

Background

With the development of technology, light sources for generating white light by laser and phosphors have been widely used in the fields of illumination and display.

For the method of emitting white light by a plurality of laser integrated excited phosphors, a plurality of laser chips are independently packaged, then light integration is carried out, and finally the excited phosphors are deactivated to generate white light. In addition, some products also adopt a scheme of simultaneously collimating and shaping laser, but the required optical elements are more, the structure is complex, and the small-size packaging requirement is not met.

Disclosure of Invention

The technical problem that this application mainly solved provides a light source device, simple structure, and the size is less, and has higher luminance.

In order to solve the technical problem, the application adopts a technical scheme that: provided is a light source device including: the tube shell and the transparent cover plate cover the tube shell to form a sealed space; the wavelength conversion device is arranged on the transparent cover plate; the light source module is positioned in the sealed space and used for emitting light beams; and the annular reflecting piece is positioned in the sealed space and comprises an annular reflecting surface used for reflecting the light beam to the wavelength conversion device.

Furthermore, the annular reflecting member is in a frustum pyramid shape, and the annular reflecting surface comprises a plurality of sub reflecting surfaces which are sequentially connected.

Further, the annular reflecting surface is arc-shaped.

Furthermore, the annular reflecting surface is step-shaped and comprises a first reflecting surface and a second reflecting surface, wherein the first reflecting surface and the second reflecting surface are arranged at an obtuse angle.

Further, the annular reflecting member further includes: the lower bottom surface is connected with one end of the annular reflecting surface and is fixed on the bottom wall of the tube shell, and an included angle between the annular reflecting surface and the lower bottom surface is an acute angle; and the platform surface is connected with the other end of the annular reflecting surface.

Further, the distance range between the light source module and the annular reflector is as follows: 0.18mm-0.22mm, the vertical distance between the platform surface and the lower bottom surface of the annular reflector is as follows: 0.8mm-1.2mm, and the included angle between the annular reflecting surface and the lower bottom surface is 25-35 degrees.

Furthermore, the light source module comprises a plurality of light emitting units which are arranged around the annular reflecting piece at equal intervals.

Further, the wavelength conversion device comprises ceramic powder slurry and fluorescent powder coated on the transparent cover plate.

Furtherly, be provided with interval distribution's first metal rete on the internal surface of the diapire of tube, be provided with interval distribution's second metal rete on the surface of the diapire of tube, still be provided with the wire of connecting first metal rete and second metal rete in the diapire of tube.

Further, the pipe shell comprises a bottom wall and a side wall, the bottom wall is connected with the side wall, and a gap is formed at the joint of the bottom wall and the side wall.

The beneficial effects of the embodiment of the application are that: the light source device comprises a tube shell, a transparent cover plate, a wavelength conversion device, a light source module and an annular reflecting piece, wherein the transparent cover plate is covered on the tube shell. Wherein, tube and transparent cover plate form the confined space, and wavelength conversion device sets up on transparent cover plate, and light source module and cyclic annular reflection part are located this confined space to realize the encapsulation to light source device, the optical member of the light source device of this application is few, and packaging structure is simple, can reduce the encapsulation process, reduces light source device's cost, and has less volume. In addition, the light source module is used for emitting light beams, the light beams are reflected to the wavelength conversion device through the annular reflecting piece, circular light spots with approximate Gaussian distribution can be formed, the brightness of the light source device can be improved, and the application requirement of the rear end is met.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of a light source device provided in the present application;

fig. 2 is a schematic structural diagram of an embodiment of an annular reflector in a light source device provided in the present application;

FIG. 3 is a schematic top view of the cartridge of FIG. 1;

FIG. 4 is a schematic structural diagram of another embodiment of a ring-shaped reflector in the light source device provided in the present application;

FIG. 5 is a schematic structural diagram of another embodiment of a ring-shaped reflector in the light source device provided in the present application;

FIG. 6 is a schematic view of a structure of a light spot formed by the light source module without optical processing;

FIG. 7 is a schematic view of the illuminance distribution of the light source module without optical processing;

FIG. 8 is a schematic structural diagram of a light spot formed by the light source device provided in the present application;

fig. 9 is a schematic view of an illuminance distribution of the light source device provided in the present application;

FIG. 10 is a schematic top view of the transparent cover plate of FIG. 1;

FIG. 11 is a schematic bottom view of the light source arrangement of FIG. 1;

FIG. 12 is a schematic bottom view of the transparent cover plate of FIG. 1;

fig. 13 is a schematic structural diagram of another embodiment of a light source device provided in the present application;

fig. 14 is a schematic cross-sectional view of the light source device in fig. 13.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The application provides a light source device can be applied to present tube shell class laser packaging, and the simple structure of this light source is convenient for encapsulate, and the volume is less, has lower cost, and this light source device has higher luminance and luminous efficacy.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a light source device provided in the present application, the light source device including: a tube shell 11, a transparent cover plate 12 covering the tube shell 11, a wavelength conversion device 4, a light source module 2 and a ring-shaped reflector 3.

Specifically, the envelope 11 and the transparent cover 12 form a sealed space in which the light source module 2 and the annular reflecting member 3 are located. The case 11 includes a bottom wall 111 and a side wall 112 connecting the bottom wall 111, and the transparent cover 12 is disposed opposite to the bottom wall 111. The transparent cover 12 may be made of optical glass, sapphire, or the like.

The light source module 2 is used for emitting light beams. The light source module 2 may be a solid-state light source such as a semiconductor laser chip or a light emitting diode chip. Preferably, the light source module 2 may be a blue laser chip having a wavelength range of 430nm to 480 nm. Since the blue light has the shortest wavelength, the other two primary lights are most easily excited, and the brightness of the light source can be improved.

Optionally, an optical element (not shown) may be disposed between the light source module 2 and the annular reflector 3, and the optical element may be used to shape the light beam emitted from the light source module 2. For example, when the light source module 2 is a semiconductor laser chip, the emitted light is laser light, and the light emitted by the laser light has a long axis and a short axis, and the light beam is shaped by adding the optical member, so that the light beam is reflected by the annular reflecting member 3 and then strikes the wavelength conversion device 4 in an approximately circular shape.

Further, the light source module 2 includes a plurality of light emitting units 21, and the light emitting units 21 may include a chip portion (not shown) and a heat sink portion (not shown) connected to the chip portion to dissipate heat of the chip. The heat sink portion of the light emitting unit 21 is fixed on the bottom wall 111 of the package 11, and can be fixedly connected to the inner surface of the bottom wall 111 by eutectic soldering, nano silver paste sintering, gold paste sintering, etc. and conduct heat. Preferably, the light emitting unit 21 and the bottom wall 111 can be connected by gold paste sintering, and the connection has high thermal conductivity, stable performance and high reliability.

As shown in fig. 1, the annular reflection member 3 includes an annular reflection surface 31, and the annular reflection surface 31 is used for reflecting the light beam emitted from the light source module 2 to the wavelength conversion device 4, wherein the wavelength conversion device 4 is disposed on the transparent cover 12. A plurality of luminous big units 21 in the light source module 2 set up around cyclic annular reflection piece 3 interval, and the light beam that a plurality of luminous units 21 sent passes through cyclic annular reflection piece 3 reflection to wavelength conversion device 4 on, can form the circular facula of approximate gaussian distribution, promote the luminance of light source, make the light source satisfy the rear end application demand.

In an embodiment, as shown in fig. 2, fig. 2 is a schematic structural diagram of an embodiment of the annular reflecting member 3 in the light source device provided in the present application, and the annular reflecting member 3 may be in a frustum shape. The annular reflecting surface 31 includes a plurality of sub reflecting surfaces 311 connected in sequence, where the number of the sub reflecting surfaces 311 is plural, for example, 6, 5, or 8 may be provided, and the setting may be selected according to actual situations.

As shown in fig. 3, a plurality of light emitting units 21 may be disposed around the ring-shaped reflector 3 at equal intervals. For example, when the annular reflector 3 is a prism, 1 light emitting unit 21 may be provided for each sub-reflecting surface 311. In a specific embodiment, the annular reflecting member 3 includes six sub-reflecting surfaces 311 connected in sequence, six light emitting units 21 are also provided, the six light emitting units 21 are uniformly arranged on the periphery of the annular reflecting member 3, and each sub-reflecting surface 311 corresponds to one light emitting unit 21.

In another embodiment, as shown in fig. 4, fig. 4 is a schematic structural diagram of another embodiment of the annular reflecting member 3 in the light source device provided in the present application, in which the annular reflecting surface 31 of the annular reflecting member 3 is arc-shaped. The arc-shaped annular reflecting surface 31 has strong pressure resistance and is convenient to produce. In addition, each direction of the arc-shaped annular reflecting surface 31 is provided with a reflecting surface, the plurality of light sources 21 can be arranged around the annular reflecting member 3 at intervals, the intervals between the adjacent light sources 21 can be equal or unequal, and light beams emitted by the light sources 21 can be reflected. In this way, the light source device has a simple structure and high reliability.

In another embodiment, as shown in fig. 5, fig. 5 is a schematic structural diagram of another embodiment of the annular reflecting member 3 in the light source device provided by the present application, and in this embodiment, the annular reflecting surface 31 may also be stepped. Specifically, the annular emitting surface 31 may include a first reflecting surface 301 and a second reflecting surface 302 connected to each other, wherein the first reflecting surface 301 and the second reflecting surface 302 are disposed at an obtuse angle. The second reflecting surface 302 is disposed at an acute angle with the bottom wall 11 of the case 11, and the first reflecting surface 301 is connected to the second reflecting surface 302 at an obtuse angle. With this arrangement, the light beams reflected by the first and second reflection surfaces 301 and 302 can be emitted to the wavelength conversion device 4 without the first reflection surface 301 affecting the light beam reflected by the second reflection surface 302. It should be noted that, for some special application scenarios, the annular reflective surface may also include multiple sets of reflective surfaces, for example, a first reflective surface, a second reflective surface and a third reflective surface, where the first reflective surface may be a planar reflective surface or an arc reflective surface, the second reflective surface may be a planar reflective surface or an arc reflective surface, and the third reflective surface may be a planar reflective surface or an arc reflective surface, which is not described herein again, and in short, the annular reflective surface formed by splicing reflective surfaces of different shapes belongs to the protection scope of the present application.

Further, in all the above embodiments, the annular reflecting surface 31 may be coated with a reflective film to achieve the function of reflecting the light beam. Preferably, the annular reflective surface 31 may be a highly reflective coated surface to increase the reflectivity of the annular reflective surface 31. The reflectivity of the high anti-coating film surface is larger than a first preset threshold value. The first preset threshold value can be selected and set according to actual conditions, and when the reflectivity of the high anti-reflection film surface is greater than the first preset threshold value, the high anti-reflection film surface basically reflects incident light so that the reflectivity of the annular reflection surface 31 can reach more than 99%.

Further, in some embodiments, as shown in fig. 2, 4 and 5, the annular reflecting member 3 may further include: a lower bottom surface 33 and a flat table surface 32.

The bottom surface 33 is connected to one end of the annular reflection surface 31 and fixed on the inner surface of the bottom wall 111 of the tube housing 11, wherein the included angle between the annular reflection surface 31 and the bottom surface 33 is an acute angle, so that the reflection surface 31 can reflect the light beam to the wavelength conversion device 4. The bottom surface 33 may be directly adhered to the bottom wall 111 of the housing 11, for example, the bottom surface 33 may be fixed to the bottom wall 111 of the housing 11 by a high temperature resistant glue. In other embodiments, the bottom surface 33 may be soldered to the bottom wall 111 of the package 11, for example, by gold plating on the bottom surface 33, and then fixing by soldering, gold paste, or silver paste.

The terrace surface 32 is connected to the other end of the annular reflecting surface 31, and the terrace surface 32 is disposed opposite to the lower bottom surface 33. The platform surface 32 may be a smooth surface to facilitate pickup by the suction nozzle, thereby facilitating accurate positioning of the prismoid-shaped reflective surface 31.

It is understood that in some embodiments, the annular reflector 3 may be provided with only the bottom surface 33 and no platform surface 32, or the annular reflector 2 may be provided with only the platform surface 32 and no bottom surface 33, etc., to adapt to different application scenarios.

The light beam emitted from the light emitting unit 21 is not optically processed, and the formed light spot is generally not uniform. For example, the light emitted from the semiconductor laser chip generally has a major axis and a minor axis, and if the light beam is not processed, the light spot at 1.5mm from the light beam is shown in fig. 6, and the light spot is generally elliptical, as shown in fig. 7, and the illuminance distribution of the major axis 10 and the minor axis 20 is not uniform, which affects the brightness and performance of the light source device.

The circular spots with certain size of Gaussian distribution can be generated by reasonably setting the distance between the light source module 2 and the annular reflecting piece 3 and the size of the annular reflecting piece 3. Specifically, the distance range between the light source module 2 and the annular reflector 3 may be: 0.18mm to 0.22mm, preferably 0.2mm, the vertical distance between the flat top surface 32 to the bottom surface 33 of the ring reflector 3 may be: 0.8mm to 1.2mm, preferably 1mm, and the annular reflecting surface 31 may be angled at an angle in the range of 25 to 35, preferably 30, to the lower base surface 33. Specifically, the inclination angle of the annular reflection surface 31 may be designed according to the positions of the light source module 2 and the wavelength conversion device 4, so that the light beam emitted from the light source module 2 is reflected by the annular reflection surface 31 and then strikes the wavelength conversion device 4, and a circular light spot with approximately gaussian distribution as shown in fig. 8 is synthesized, where the light spot distribution is formed by overlapping the light beams emitted from the plurality of light sources 21, and as shown in fig. 9, the illuminance in the major axis 10 direction and the minor axis 20 direction of the light spot is almost the same. By the mode, other optical parts are not needed to be adopted to carry out light shaping on the light beam emitted by each light-emitting unit 21, the structure of the light source device is simplified, and the production cost is saved.

Light beams emitted by the light source module 2 pass through the annular reflecting piece 3 and reach the wavelength conversion device 4 to excite fluorescence, and the residual unexcited light beams and the fluorescence can be synthesized into white light meeting the application requirements of the rear end.

For different brightness requirements, the number of the light emitting units 21, the size of the annular reflection member 3, the position and the size of the wavelength conversion device 4, and the like can be adjusted according to actual conditions, so that the light beams emitted by the light source module 2 are reflected on the annular reflection surface 31, the light beams do not hit the outside of the annular reflection surface 31, and then the light beams are combined into circular light spots with bright centers and dark edges and approximate gaussian distribution.

Preferably, in some embodiments, an optical element for processing the major axis or the minor axis may be disposed between the light source module 2 and the annular reflector 3, so as to prevent a part of the light beam from being lost due to not hitting the annular reflector 3, thereby improving the light utilization rate of the light source module 2.

That is, in the above embodiment, the light beams emitted from the light source module 2 are reflected by the annular reflection member 3 onto the wavelength conversion device 4 to be synthesized into a circular light spot with approximate gaussian distribution. The wavelength conversion device 4 may be used to excite fluorescence such that the excited fluorescence can meet the white light required by the backend application.

Further, as shown in fig. 10, fig. 10 is a schematic top view of the transparent cover plate 12 in fig. 1. The wavelength conversion device 4 is disposed on the transparent cover 12. Specifically, the wavelength conversion device 4 may include a ceramic paste and a phosphor coated on the transparent cover plate 12. Phosphor and ceramic powder slurries may be coated on the transparent cover plate 12 to form the wavelength conversion device 4. The wavelength conversion device 4 may be formed by adding scattering particles to the wavelength conversion device 4, diffusing light, and then integrally firing the light into a single body. In this way, the wavelength conversion device 4 has a simple structure and a low production cost. In other embodiments, the wavelength conversion device 4 may be produced separately and then the wavelength conversion device 4 may be bonded to the transparent cover 12, which may improve the production efficiency of the light source device.

It is understood that white light of a desired color temperature can be obtained by adjusting the kind, concentration, thickness, concentration of scattering particles, and the like of the phosphor in the wavelength conversion device 4.

The wavelength conversion device 4 has any one of a circular, square, rectangular, or elliptical shape. The specific setting can be selected according to the actual situation. Preferably, the wavelength conversion device 4 may be circular, corresponding to the shape of the light spot, and can improve the light extraction rate of the light source device.

The wavelength conversion device 4 may be located on a side surface of the transparent cover plate 12 remote from the sealed space. In another embodiment, the wavelength conversion device 4 may be disposed on one side surface of the transparent cover 12 close to the sealed space, so that the wavelength conversion device 4 can be sealed in the sealed space, the wavelength conversion device 4 can be protected from dust, and the influence of dust on the light conversion rate of the wavelength conversion device 4 can be reduced.

The annular reflecting member 3 reflects the light beam and outputs the light beam to the wavelength conversion device 4. Optionally, an optical film (not shown) may be plated on the light incident surface of the wavelength conversion device 4, and the optical film may transmit the light beam emitted by the light source module 2 and reflect the fluorescence excited by the wavelength conversion device 4, so as to prevent the fluorescence from entering the interior of the tube shell 11 and reduce the luminous flux.

In order to further prevent the light beam (such as blue laser with wavelength of 430-470 nm) hitting the wavelength conversion device 4 from being reflected back into the sealed space again, and reduce the excitation efficiency, the optical film layer on the wavelength conversion device 4 may transmit the light beam with an incidence angle within a preset threshold range, and reflect the light beam with an incidence angle greater than the preset threshold, where the preset threshold may be 45 °, 30 °, or 55 °. In this way, the light beam can excite the fluorescent powder to a greater extent, so that white light with high brightness can be emitted.

In this embodiment, the bottom wall 111 and the side wall 112 of the case 11 can be made of the same material and integrally formed, so as to simplify the manufacturing process. Alternatively, the bottom wall 111 and the side walls 112 of the envelope 11 may both be made of a highly heat-conducting ceramic material. Such as aluminum nitride, silicon carbide, polycrystalline diamond ceramics, beryllium oxide, and the like. In other embodiments, the material of the package 11 is also metal, such as copper or silver.

When the material of the tube shell 11 is ceramic, the inside of the tube shell 11 may be plated with metal to facilitate mounting the light source module 2, wherein the portion of the sidewall 112 of the tube shell 11 contacting the transparent cover 12 may also be plated with metal to improve the overall packaging effect of the light source. The package 11 may be primed with titanium or platinum during metallization.

As shown in fig. 3, first metal films 114 may be disposed on the inner surface of the bottom wall 111 of the package 11 at intervals to facilitate mounting the light source modules 2, as shown in fig. 11, second metal films 115 are disposed on the outer surface of the bottom wall 111 of the package 11 at intervals, and a conducting wire (not shown) is disposed in the bottom wall 111 of the package 11 and connects the first metal films 114 and the second metal films 115. The first metal film layer 114 forms one bonding pad inside the package 11 and the second metal film layer 115 forms another bonding pad outside the package 11. The first metal film layer 114 and the second metal film layer 115 may be made of gold, silver, copper, or the like. The wire may preferably be a metal with a coefficient of thermal expansion close to that of ceramics and a metal with a lower resistivity, such as metallic tungsten. The light source 21 may be soldered to the first metal layer 114 by a metal wire and electrically connected to the outer second metal film layer 115 by a wire, and current input and heat transfer are accomplished by means of soldering to a printed circuit board.

In order to improve the sealing performance of the light source device, as shown in fig. 3, a first metal connection layer 113 may be disposed at a position where the side wall 112 of the package 11 contacts the transparent cover 12, for example, the material of the first metal connection layer 113 may be gold, silver, or other metal. As shown in fig. 12, a second metal connection layer 121 may be disposed at a position where the transparent cover 12 contacts the package 11, so that the package of the package 11 and the transparent cover 12 is facilitated.

The package 11 of the present embodiment is made of a ceramic material with high thermal conductivity, so that the cost is low and the reliability of the light source can be improved. The side wall 112 and the bottom wall 111 of the case 11 are integrally formed for easy manufacture. In addition, the light beam emitted by the light source module is reflected to the wavelength conversion device 4 through the annular reflecting piece 3, and the circular light spots with approximate Gaussian distribution can be synthesized, so that the brightness of the light source device can be improved, and the application requirement of the rear end is met.

Referring to fig. 13 and 14, fig. 13 is a schematic structural view of another embodiment of the light source device provided in the present application, and fig. 14 is a schematic sectional view of the light source device in fig. 13, different from the previous embodiment, in this embodiment, a side wall 112 and a bottom wall 111 of the tube case 11 may be separately provided, and the bottom wall 111 of the tube case 11 is connected to the side wall 112.

Alternatively, the sidewall 112 and the bottom wall 111 of the case 11 may be made of different materials, for example, the sidewall 112 of the case 11 may be made of a ceramic material, and the bottom wall 111 of the case 11 may be made of a metal material. Wherein the ceramic material can be a common ceramic material such as alumina and the like, so as to save the production cost. The sidewalls 112 of the envelope 11 may also be a highly thermally conductive ceramic material, such as aluminum nitride or silicon carbide, to improve the thermal conductivity of the envelope 11.

The bottom wall 111 of the envelope 11 may be made of a metallic material with a high thermal conductivity, such as copper or a tungsten-copper alloy. In this way, the bottom wall 111 of the package 11 can be used as a heat conductor to conduct heat to the light source device.

The bottom wall 111 of the case 11 is connected to the side wall 112, and preferably, a gap is formed at the connection between the bottom wall 111 and the side wall 112. By providing this slit, it is possible to prevent the bottom wall 111 from causing mechanical failure such as cracking or deformation of the case 11 due to thermal expansion.

As shown in fig. 14, the bottom wall 111 and the side wall 112 of the case 11 can be connected by a connecting material 117, and the connecting material 117 is partially disposed between the bottom wall 111 and the side wall 112 of the case 11, and allows a certain gap to be left between the bottom wall 111 and the side wall 112. Alternatively, the bottom wall 111 and the side wall 112 of the case 11 may be hermetically sealed by brazing or soldering.

In order to facilitate the connection between the bottom wall 111 and the side wall 112, a groove may be formed on the side of the side wall 112 away from the transparent cover 12, the bottom wall 111 is located in the groove, and the inner surface of the bottom wall 111 and the position where the side surface of the bottom wall 111 is connected to the side wall 112 are both provided with a connecting material 117, so that the tube case 11 has better air tightness and the sealing reliability of the tube case 11 is improved.

Optionally, in order to facilitate the packaging of the light source module 2, a step 116 is formed on the side wall 112 of the package near the bottom wall 111, and the metal wires of the light emitting unit 21 can be directly hit on the step 116, thereby simplifying the packaging process. In other embodiments, the step 116 may not be provided on the sidewall 112 of the housing 11 to simplify the manufacturing process of the housing.

The structures of the wavelength conversion device 4, the annular reflector 3, and the transparent cover 12 in this embodiment that are not described are the same as those in the previous embodiment, and are not described again. This embodiment describes only the point of difference from the previous embodiment.

In the light source device of the present embodiment, the gap is provided at the joint between the bottom wall 111 and the side wall 112 of the package 11, so that the package 11 can be effectively prevented from cracking due to thermal expansion, and the reliability of the light source device can be improved. The bottom wall 111 and the side wall 112 of the case 11 can be made of different materials as required, so that the production cost can be saved.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. A light source device, characterized in that the light source device comprises:

the tube shell and the transparent cover plate are covered on the tube shell, and a sealed space is formed by the tube shell and the transparent cover plate;

the wavelength conversion device is arranged on the transparent cover plate;

the light source module is positioned in the sealed space and used for emitting light beams;

and the annular reflecting part is positioned in the sealed space and comprises an annular reflecting surface used for reflecting the light beam to the wavelength conversion device.

2. The light source device according to claim 1, wherein the annular reflecting member has a truncated pyramid shape, and the annular reflecting surface includes a plurality of sub-reflecting surfaces connected in series.

3. The light source device of claim 1, wherein the annular reflective surface is arcuate.

4. The light source device of claim 1, wherein the annular reflective surface is stepped and comprises a first reflective surface and a second reflective surface, wherein the first reflective surface and the second reflective surface are arranged at an obtuse angle.

5. The light source device according to any one of claims 1 to 4, wherein the annular reflecting member further comprises:

the lower bottom surface is connected with one end of the annular reflecting surface and is fixed on the bottom wall of the tube shell, and an included angle between the annular reflecting surface and the lower bottom surface is an acute angle;

and the platform surface is connected with the other end of the annular reflecting surface.

6. The light source device according to claim 5, wherein the distance between the light source module and the annular reflector is in a range of: 0.18mm-0.22mm, the vertical distance between the platform surface and the lower bottom surface of the annular reflector is as follows: 0.8mm-1.2mm, and the included angle between the annular reflecting surface and the lower bottom surface is 25-35 degrees.

7. The light source device according to claim 1, wherein the light source module comprises a plurality of light emitting units, and the plurality of light emitting units are arranged around the annular reflector at equal intervals.

8. The light source device of claim 1, wherein the wavelength conversion device comprises a ceramic paste and a phosphor coated on the transparent cover plate.

9. The light source device according to claim 1, wherein the inner surface of the bottom wall of the package is provided with first metal films at intervals, the outer surface of the bottom wall of the package is provided with second metal films at intervals, and the bottom wall of the package is further provided with a conducting wire connecting the first metal films and the second metal films.

10. The light source device as claimed in claim 1, wherein the package includes a bottom wall and a side wall, the bottom wall is connected to the side wall, and a gap is formed at a connection position of the bottom wall and the side wall.