CN218547229U

CN218547229U - Light source device and projection device

Info

Publication number: CN218547229U
Application number: CN202221807242.8U
Authority: CN
Inventors: 李德果; 刘宪; 周建华; 李屹
Original assignee: Appotronics Corp Ltd
Current assignee: Shenzhen Appotronics Corp Ltd
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2023-02-28
Anticipated expiration: 2032-07-12

Abstract

The application provides a light source device, includes: the lens comprises a shell, a radiator, a fluorescence generating device and a lens group. The shell is provided with an inner cavity and an opening communicated with the inner cavity. The radiator comprises a substrate and a radiator body, the substrate is fixed on the shell and seals the opening, the radiator body is arranged on the surface of the substrate, which is far away from the inner cavity, and the substrate is provided with a plurality of adjusting holes. The fluorescence generating device is fixed on the surface of the substrate close to the inner cavity. The lens group comprises a lens support, one or more lenses and a plurality of adjusting pieces, the lens support is arranged in the inner cavity and is adjacent to the fluorescence generating device, the one or more lenses are arranged on the lens support, and the adjusting pieces are arranged on the lens support and are in one-to-one correspondence with the adjusting holes. According to the light source device provided by the embodiment of the application, the lens can be adjusted to the optimal position, so that exciting light can be accurately irradiated onto the fluorescence generating device, and the adjusting process is simple and convenient. The application also provides a projection device.

Description

Light source device and projection device

Technical Field

The application relates to the technical field of projection, in particular to a light source device and a projection device.

Background

The laser fluorescent powder technology is a novel high-brightness light source solution, and can be widely applied to the fields of projection display and the like. The laser fluorescent powder technology is to use laser to excite fluorescent powder to generate excited laser as light source. Because the optical power density of the laser is very high, the optical power density of the stimulated light generated by exciting the fluorescent powder is also very high, and therefore the light source can generate high-brightness stimulated light or mixed light of the stimulated light and the exciting light.

The excitation efficiency of the phosphor sheet is related to the accuracy of the position of the laser light irradiated on the phosphor sheet, and a lens is generally used to irradiate the phosphor sheet with the excitation light.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a light source device and a projection device to improve the technical problem.

In a first aspect, the present application provides a light source device, comprising: the lens comprises a shell, a radiator, a fluorescence generating device and a lens group. The shell is provided with an inner cavity and an opening communicated with the inner cavity. The radiator comprises a substrate and a radiator body, the substrate is fixed on the shell and seals the opening, the radiator body is arranged on the surface of the substrate, which is far away from the inner cavity, and the substrate is provided with a plurality of adjusting holes. The fluorescence generating device is fixed on the surface of the substrate close to the inner cavity. The lens group comprises a lens support, one or more lenses and a plurality of adjusting pieces, wherein the lens support is arranged in the inner cavity and is adjacent to the fluorescence generating device, the one or more lenses are arranged on the lens support, and the adjusting pieces are arranged on the lens support and correspond to the adjusting holes one to one.

In some embodiments, the plurality of adjustment members includes at least three adjustment members, at least 3 adjustment members being non-colinear disposed.

In some embodiments, the lens holder is provided with a mounting hole, and the adjusting member is rotatably disposed in the mounting hole and is threadedly coupled to the housing.

In some embodiments, the lens assembly further includes a plurality of springs, each spring is sleeved on one of the adjusting members, and two ends of each spring abut against the housing and the lens holder respectively.

In some embodiments, the light source device further includes a first sealing member disposed around the opening, and the first sealing member abuts between the substrate and the housing.

In some embodiments, the light source device further includes a plurality of second sealing members, and the second sealing members are detachably disposed in the adjusting holes in a one-to-one correspondence.

In some embodiments, the light source device further comprises a light source for emitting exciting light to excite the fluorescence generating device to form excited light.

In some embodiments, the light source device further includes a beam splitter, the housing is provided with a light outlet, the beam splitter is disposed in the content cavity, at least a portion of the excitation light passes through the beam splitter and the lens and then enters the fluorescence generating device, and the beam splitter is further configured to reflect the received laser light emitted by the fluorescence generating device, so that the received laser light is emitted from the light outlet.

In some embodiments, the light source device further comprises a scattering device for reflecting a portion of the excitation light reflected by the beam splitter toward the light exit port.

In a second aspect, the present application provides a projection apparatus comprising a light source apparatus as claimed in any one of the above.

The light source device that this application embodiment provided is provided with the regulation hole on the radiator base plate, can adjust the regulating part through the regulation hole to the realization is to the regulation of lens position. In the adjusting process, the position of the lens can be adjusted without opening the shell of the light source device, the lens can be adjusted to the optimal position, exciting light can be accurately irradiated on the fluorescence generating device, and the adjusting process is simple and convenient.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a light source device according to an embodiment of the present disclosure;

fig. 2 is a schematic partial structural diagram of a light source device in use according to an embodiment of the present disclosure;

fig. 3 is a schematic partial structural diagram of a light source device according to an embodiment of the present disclosure.

Detailed Description

In order to make the technical solution better understood by those skilled in the art, the technical solution 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. It should be apparent that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any inventive step based on the embodiments in the present application, are within the scope of protection of the present application.

In this application, the terms "mounted," "connected," "secured," and the like are to be construed broadly unless otherwise expressly specified or limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, or they may be connected through the inside of two elements, or they may be connected only through surface contact or through surface contact of an intermediate member. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "first," "second," and the like are used merely for distinguishing between descriptions and not intended to imply or imply a particular structure. The description of the terms "some embodiments," "other embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiments or examples is included in at least one embodiment or example of the application. In this application, the schematic representations of the terms used above are not necessarily intended to be the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the various embodiments or examples and features of the various embodiments or examples described in this application can be combined and combined by those skilled in the art without conflicting.

The application provides a projection device, which comprises a light source device 1. In this embodiment, the projection apparatus may further include a projection lens, a spatial light modulator, and other components. The projection device can convert the electrical signal into an optical signal and project the optical signal to a display surface, the display surface may be a flat surface, such as a curtain or a wall, or a surface of other structures, such as a front windshield of an automobile, and the specific display surface is not limited herein. The projection device may employ various projection technologies, such as Liquid Crystal Display (LCD) projection technology, digital Light Processor (DLP) projection technology.

Referring to fig. 1, the light source device 1 includes a housing 10, a heat sink 20, a fluorescence generating device 30, and a lens assembly 40. In the present embodiment, the light source device 1 may further include a light source 50, and the light source 50 is used for emitting excitation light to excite the fluorescence generating device 30 to form the excited light L3. The light source 50 may be a spatial light modulator, or may be some other laser generating structure, which is not limited herein.

The outer shell 10 is provided with an inner cavity 11 and an opening 12 communicated with the inner cavity 11, the inner cavity 11 is arranged in the outer shell 10, and the opening 12 is communicated with the inner cavity 11. The opening 12 is used to dispose the heat sink 20 and the lens group 40. In the present embodiment, the housing 10 is further provided with a light outlet 13, and the light outlet 13 is used for emitting light. For example, the heat sink 20 includes a base plate 21 and a heat sink body 22, and the housing 10 may include a plurality of plates 14 spliced with the base plate 21. In the present embodiment, the light source 50 is disposed on the surface of the plate 14 opposite to the substrate 21, and the light outlet 13 is disposed on the plate 14 perpendicular to the substrate. In other embodiments, the housing 10 may also be an integrally formed structure, and the specific structure of the housing 10 is not limited herein.

The lens group 40 includes a lens holder 41, one or more lenses 42, and a plurality of adjusting members 43, the lens holder 41 is disposed in the inner cavity 11, the adjusting members 43 are disposed on the lens holder 41, and the lens holder 41 can be controlled to move by the adjusting members 43 to adjust the position of the lens group 40 in the inner cavity 11. By adjusting the lens group 40, the position of the fluorescence generating device 30 irradiated with the excitation light can be adjusted, so that the fluorescence generating device 30 can generate the received laser light L3 with excellent working efficiency. Illustratively, the lens 41 may be a plate-shaped member, a through hole is formed in the plate-shaped member, the through hole is coaxially arranged with the lens 42, the through hole is used for transmitting light, and the adjusting member 43 is arranged at an edge position of the lens holder 41. In other embodiments, the lens holder 41 may have other structures, and the specific structure of the lens holder 41 is not limited herein.

In the present embodiment, the light source device 1 may further include a beam splitter 60. The beam splitter 60 is disposed in the inner cavity 11, at least a portion of the excitation light passes through the beam splitter 60 and the lens 42 and then enters the fluorescence generating device 30, and the beam splitter 60 is further configured to reflect the received laser light L3 emitted from the fluorescence generating device 30, so that the received laser light L3 is emitted from the light outlet 13. For example, referring to fig. 2, the beam splitter 60 is used for splitting the excitation light into a first excitation light L1 and a second excitation light L2. Wherein, the mirror surface of the spectroscope 60 has a certain angle with the exciting light and is connected with the plate 14. After passing through the beam splitter 60, the first excitation light L1 irradiates the fluorescence generating device 30 to form the excited light L3. The received laser light L3 is reflected by the spectroscope 60 and then emitted from the light exit 13. By designing the light path, the structure of the light source device 1 can be compact, and the position of the light spot formed by the laser beam L3 at the light exit 13 can be adjusted by adjusting the position of the spectroscope 60. In other embodiments, the spectroscope 60 may also be formed by combining a plurality of lenses with different functions, and the same technical effect as that of the spectroscope 60 in the present embodiment can also be achieved, and the specific structure of the spectroscope 60 is not limited herein.

Depending on the type of the light source device 1, the light source 50 needs to generate mixed light of the excited light L3 and the excitation light in some cases. Therefore, in the present embodiment, the light source device 1 further includes a scattering device 70, and the scattering device 70 is configured to reflect a part of the excitation light reflected by the beam splitter 60 toward the light outlet 13. For example, in the present embodiment, the scattering device 70 may also be disposed in the inner cavity 11 and opposite to the light outlet 13. After the beam splitter 60 splits the excitation light into the first excitation light L1 and the second excitation light L2, the second excitation light L2 is irradiated to the scattering device 70, so that the second excitation light L2 is scattered. The scattered second excitation light L2 passes through the spectroscope 60 again, and is mixed with the received laser light L3, and then light is emitted from the light exit 13.

In some embodiments, in order to adjust the second excitation light L2 to be accurately irradiated to the scattering device 70, the light source device 1 may further include an adjusting lens 80, the adjusting lens 80 may be disposed near the scattering device 70, the second excitation light L2 penetrates through the adjusting lens 80 and then irradiates the scattering device 70, and the scattered second excitation light L2 also penetrates through the adjusting lens 80 and then passes through the beam splitter 60. By adjusting the adjusting lens 80, the second excitation light L2 can be accurately irradiated to the scattering device 70. In some embodiments, the spot size formed by the second excitation light L2 at the light outlet position can also be adjusted by adjusting the adjusting lens 80.

The fluorescence generating device 30 is used for generating the stimulated light L3, in this embodiment, the fluorescence generating device 30 may be a structure having a fluorescent coating, and as an implementation mode, the coating material may be YAG phosphor, which can absorb blue light and be stimulated to emit yellow stimulated light L3. In other embodiments, the material may be quantum dots, fluorescent dyes, etc., and is not limited herein. In the present embodiment, the fluorescent coating structure on the fluorescence generating device 30 is disposed opposite to the through hole on the lens holder 41 to receive the first excitation light L1 passing through the lens group 40.

The first excitation light L1 needs accurate positional accuracy when irradiated onto the fluorescence generating device 30 to ensure the efficiency of the fluorescence generating device 30 for generating the excited light L3. Therefore, in the present embodiment, the lens assembly 40 is arranged to adjust the optical path of the first excitation light L1, so that the first excitation light L1 and the fluorescence generating device 30 can be at the position with the maximum optical coupling efficiency. In the present embodiment, the base plate 21 is provided with a plurality of adjusting holes 211, one or more lenses 42 are mounted on the lens holder 41, and a plurality of adjusting members 43 are provided on the lens holder 41 in one-to-one correspondence with the plurality of adjusting holes 211. The adjusting member 43 can be adjusted through the adjusting hole 211 to achieve the purpose of adjusting the lens group 40.

Illustratively, as an embodiment, the plurality of adjusting members 43 includes at least three adjusting members 43, and the at least three adjusting members 43 are not arranged in a line. The lens holder 41 is in this embodiment arranged in the interior volume 11 via three adjustment members 43. Each of the adjusting pieces 43 can adjust the installation distance of the lens holder 41 at the adjusting piece 43 with respect to the housing 10. The three adjusting members 43 can be arranged along a right-angled "L" shape, so that the three adjusting members 43 can fix the lens holder 41 on a plane, thereby avoiding the problem that the lens holder 41 rotates along a connecting line between the two adjusting members 43. In the present embodiment, a coupling hole (not shown) is provided on the housing, the coupling hole may be formed on a side of the plate member 14 that is formed to enclose the housing 10, and three adjusting members 43 are threadedly provided in the coupling hole to couple the adjusting members 43 with the housing 10. In other embodiments, the adjusting members 43 may be provided in fewer than three positions, such as by providing a guide post for preventing shaking, and the like, and are not limited herein.

Referring to fig. 3, in the present embodiment, in order to adjust the adjusting member 43 from the adjusting hole 211, the adjusting member 43 may be screwed with the housing 10, and the lens holder 41 may be adjusted by rotating the adjusting member 43. Illustratively, in the present embodiment, the lens holder 41 is provided with a mounting hole 411, the adjusting member 43 is rotatably disposed in the mounting hole 411, and the adjusting member 43 is screwed with the housing 10. The adjustment of the adjustment member 43 may be accomplished by a tool such as a screwdriver extending into the adjustment hole 211 to rotate the bolt during use.

The provision of only the mounting hole 411 may cause a problem in that the lens holder 41 slides along the adjusting member 43. In this embodiment, therefore, the lens group 40 further comprises a plurality of springs 44, and the springs 44 are used to stabilize the adjustment process. Illustratively, the number of the springs 44 corresponds to the number of the adjusting members 43, each spring 44 is sleeved on one adjusting member 43, and two ends of each spring 44 abut against the housing 10 and the lens holder 41 respectively. During use, the spring 44 always pushes the lens holder 41 away from the housing 10, preventing it from sliding axially along the adjustment member 43.

The heat sink 20 is used for dissipating heat from the light source device 1. The fluorescence generating device 30 is fixed on the surface of the substrate 21 close to the inner cavity 11, the heat sink body 22 is arranged on the surface of the substrate 21 far from the inner cavity 11, and in the light source device 1, the fluorescence generating device 30 generates a large amount of heat in the process of receiving the first excitation light L1 and generating the excited light L3. In the present embodiment, therefore, the fluorescence generating device 30 is fixed to one side surface of the substrate 21, and the heat sink body 22 is fixed to the opposite side surface of the substrate 21. The substrate 21 may be made of a material with a high thermal conductivity, such as a copper plate or a stainless steel plate, but is not limited thereto. The heat generated by the fluorescence generating device 30 is transferred to the heat sink body 22 by heat conduction, and exchanges heat with the heat sink body 22. The heat sink body 22 may be an air cooling device or a liquid cooling panel, and the specific structure of the heat sink body 22 is not limited herein. In the present embodiment, the base plate 21 is connected to the plurality of plate members 14 by fixing bolts, so that the base plate 21 is fixed to the housing 10. In other embodiments, the substrate 21 may also be connected to the housing 10 by bonding, for example, and the specific connection manner between the substrate 21 and the housing 10 is not limited herein.

In order to make the light less interfered in the process of conducting in the inner cavity 11, the inner cavity 11 may be in a sealed state or filled with inert gas, etc. to prevent dust, etc. in the air from entering the inner cavity 11 to affect the conduction of the light. Therefore, as an embodiment, the light source device 1 further includes a first sealing member 90, the first sealing member 90 is disposed around the opening 12, and the first sealing member 90 abuts between the substrate 21 and the housing 10. For example, the first sealing member 90 may be a rubber ring disposed corresponding to the opening 12 for sealing a gap between the substrate 21 of the heat sink 20 and the housing 10. In other embodiments, the first sealing element 90 may have other structures, and is not limited herein.

Since the adjusting member 43 is located in the inner cavity 11 and adjusted through the adjusting hole 211, there may be a problem that dust and other impurities may enter the inner cavity 11 from the adjusting hole 211, in this embodiment, the light source device 1 further includes a plurality of second sealing members 100, and the plurality of second sealing members 100 are detachably disposed in the adjusting hole 211 in a one-to-one correspondence manner. For example, the second sealing member 100 may be a T-shaped cork, and a poppet sealing member may be disposed at the opening 12 of the adjustment hole 211 to close the adjustment hole 211. In use, adjustment can be achieved by simply pulling out the second seal 100. In other embodiments, the second sealing element 100 may have other structures, such as a threaded hole 411, and the like, which is not limited herein.

The application proposes the use principle of the projection device as follows:

in the projection apparatus provided by the present application, the adjusting hole 211 is disposed on the substrate 21 of the heat sink 20, and the adjusting member 43 can be adjusted through the adjusting hole 211. Since the lens holder 41 is disposed on the housing 10 through the adjusting member 43, the adjusting member 43 can adjust the position of one or more lenses 42, so that the light emitted from the light source 50 can be emitted to the fluorescence generating device 30 accurately. In the light source device 1 according to the embodiment of the present application, the adjustment hole 211 is provided in the substrate 21 of the heat sink 20, and the adjustment piece 43 can be adjusted through the adjustment hole 211 to adjust the position of the lens 42. In the adjusting process, the position of the lens 42 can be adjusted without opening the housing 10 of the light source device 1, the lens 42 can be adjusted to the optimal position, so that the exciting light can be accurately irradiated onto the fluorescence generating device 30, and the adjusting process is simple and convenient.

The above embodiments are only intended to illustrate the technical solution of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present disclosure, and they should be construed as being included in the present disclosure.

Claims

1. A light source device, comprising:

the shell is provided with an inner cavity and an opening communicated with the inner cavity;

the radiator comprises a substrate and a radiator body, the substrate is fixed on the shell and seals the opening, the radiator body is arranged on the surface of the substrate, which is far away from the inner cavity, and the substrate is provided with a plurality of adjusting holes;

the fluorescence generating device is fixed on the surface of the substrate close to the inner cavity;

the lens group comprises a lens support, one or more lenses and a plurality of adjusting pieces, the lens support is arranged in the inner cavity and is adjacent to the fluorescence generating device, one or more lenses are arranged on the lens support, and the adjusting pieces are arranged on the lens support and are in one-to-one correspondence with the adjusting holes.

2. The light source device of claim 1, wherein the plurality of adjustment members comprises at least three adjustment members, at least 3 of the adjustment members being arranged non-colinear.

3. The light source device according to claim 2, wherein the lens holder has a mounting hole, and the adjusting member is rotatably disposed in the mounting hole and is screwed to the housing.

4. The light source device according to claim 3, wherein the lens assembly further includes a plurality of springs, each of the springs is sleeved on one of the adjusting members, and two ends of each of the springs respectively abut against the housing and the lens holder.

5. The light source device according to claim 1, further comprising a first sealing member disposed around the opening, wherein the first sealing member abuts between the substrate and the housing.

6. The light source device according to claim 1, further comprising a plurality of second sealing members, wherein the plurality of second sealing members are detachably disposed in the adjustment holes in a one-to-one correspondence.

7. The light source device according to any one of claims 1 to 6, further comprising a light source for emitting excitation light to excite the fluorescence generating device to form excited light.

8. The light source device according to claim 7, further comprising a beam splitter, wherein the housing is provided with a light exit, the beam splitter is disposed in the content cavity, at least a portion of the excitation light passes through the beam splitter and the lens and then enters the fluorescence generating device, and the beam splitter is further configured to reflect the received laser light emitted from the fluorescence generating device, so that the received laser light exits from the light exit.

9. The light source device according to claim 8, further comprising a scattering device for reflecting a portion of the excitation light reflected by the beam splitter toward the light outlet.

10. A projection apparatus comprising the light source apparatus according to any one of claims 1 to 9.