CN114995036A

CN114995036A - Light source device and projection system

Info

Publication number: CN114995036A
Application number: CN202210755997.6A
Authority: CN
Inventors: 张勇; 顾晓强
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-09-02
Also published as: WO2024001353A1; WO2024001353A9

Abstract

The invention discloses a light source device and a projection system. The laser light source array emits laser to excite the fluorescence conversion component to emit fluorescence so as to realize the emission of tricolor light. The fluorescent conversion part adopts a fixed fluorescent conversion part, a driving element in a fluorescent powder wheel scheme is removed in the fixed fluorescent conversion scheme, and the fixed fluorescent conversion part is fixedly assembled in a light source device system, so that the system reliability can be greatly improved, no mechanical movement exists, and the structural design size of the light source device can be reduced. The fluorescent material is reduced to a small-area square or circular area from the original annular area, so that the use amount of the used fluorescent material is greatly reduced, and the material cost is reduced. In addition, the fixed fluorescent conversion member can be subjected to concentrated heat dissipation without dynamic restriction of high-speed rotation. And stable optical performance and high-efficiency output under certain laser power are realized by adopting a simple optical path.

Description

Light source device and projection system

Technical Field

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

Background

Projection display is a technique in which a light source is controlled by plane image information, and an image is enlarged and displayed on a projection screen using an optical system and a projection space. With the development of projection display technology, projection display is gradually applied to the fields of business activities, conference exhibition, scientific education, military command, traffic management, centralized monitoring, advertising entertainment and the like, and the advantages of large display picture size, clear display and the like are also suitable for the requirement of large-screen display.

Laser is applied to the field of projection display because of the advantages of high brightness, strong monochromaticity, wide color gamut and the like, and three-color light is emitted in the mode that high-energy laser excites a fluorescent powder wheel to emit light in the existing laser projection system. In the scheme of the fluorescent powder wheel, more blue light loop lenses are arranged, and the size of the fluorescent powder wheel is larger due to the heat dissipation and high-speed rotation requirements of the fluorescent powder wheel, so that stronger structural support and larger installation space are required, and the structural size of a light source is larger. The heat of the fluorescent powder wheel cannot be rapidly dissipated under the irradiation of laser with high power, and the conversion efficiency of the fluorescent material is reduced due to the overhigh temperature, so that the optical output is influenced.

Disclosure of Invention

In some embodiments of the invention, a light source device comprises: the device comprises a laser light source array, a dichroic mirror, a dynamic optical component, a fluorescence conversion component and a heat dissipation component. The laser light source array emits laser to excite the fluorescence conversion component to emit fluorescence so as to realize the emission of tricolor light. The fluorescent conversion part adopts a fixed fluorescent conversion part, a driving element in a fluorescent powder wheel scheme is removed in the fixed fluorescent conversion scheme, and the fixed fluorescent conversion part is fixedly assembled in a light source device system, so that the system reliability can be greatly improved, mechanical movement is avoided, and the structural design size of the light source device can be reduced. The fluorescent material is reduced to a small-area square or circular area from the original annular area, so that the use amount of the used fluorescent material is greatly reduced, and the material cost is reduced. In addition, the fixed fluorescent conversion member can be subjected to concentrated heat dissipation without dynamic restriction of high-speed rotation. And the compact optical path is adopted to realize stable and efficient optical performance output under certain laser power.

In some embodiments of the present invention, the laser light source array includes a first laser light source group and a second laser light source group arranged side by side. The first laser light source group may include a plurality of laser light sources, the second laser light source group may include a plurality of laser light sources, and the first laser light source group and the second laser light source group include the same laser light source and are both used to emit laser light of the first wavelength band.

In some embodiments of the present invention, the dichroic mirror is disposed on the light exit path of the laser light source array. The dichroic mirror is formed by coating a film on the surface of a transparent flat plate by utilizing the thin film interference principle, and can reflect or increase light with different wave bands according to the required reflection increasing. The dichroic mirror comprises a first part and a second part, and different parts of the dichroic mirror can be used for anti-reflection or increasing and reflecting light rays with different wave bands by adopting different coating processes. The first part is used for transmitting light rays in a first wave band, and the second part is used for reflecting the light rays in the first wave band and a second wave band.

In some embodiments of the invention, the light source device further comprises a first reflector and a second reflector. The dichroic mirror includes two first portions and two second portions, the first portions and the second portions being alternately arranged. The first reflector is positioned on the light outlet side of the first laser light source group and used for reflecting the emergent light of the first laser light source group to one of the two first parts. The second reflector is positioned on the light-emitting side of the second laser light source group and used for reflecting the emergent light of the second laser light source group to the other first part of the two first parts. By setting the first reflector and the second reflector at proper angles, the laser emitted by the first laser light source group can be incident on one of the first parts after being reflected by the first reflector, and the laser emitted by the second laser light source group can be incident on the other first part after being reflected by the second reflector.

In some embodiments of the present invention, the dynamic optical component includes a reflection portion and a transmission portion, and the dynamic optical component further includes a driving element, and the driving element can drive the dynamic optical component to move, so that the laser light can be incident to the reflection portion and the transmission portion in a time-sharing manner. When the laser light enters the reflection unit, the laser light is reflected by the dichroic mirror and is further reflected by the dichroic mirror in the set direction. When the laser is incident to the transmission part, the laser can be incident to the fluorescence conversion part to excite the fluorescence conversion part to emit fluorescence, and the fluorescence emitted by excitation is reflected to the dichroic mirror and then reflected to the set direction by the dichroic mirror. Therefore, the light with different colors can be output in a time sequence in the set direction, and the emission of the tricolor light is realized. The dynamic optical component can realize the switching between the reflecting part and the transmitting part by adopting the modes of rotation, linear reciprocating motion, electric conversion and light transmission and the like.

In some embodiments of the present invention, the first wavelength band of light is blue light, the second wavelength band includes a first sub-wavelength band and a second sub-wavelength band, the first sub-wavelength band of light is red light, and the second sub-wavelength band of light is green light.

In some embodiments of the invention, the fluorescence conversion component comprises: a fluorescence conversion layer, an anti-reflection layer and a reflection layer. The fluorescence conversion layer is used for emitting light of a second wave band under the excitation of the light of the first wave band. The anti-reflection layer is used for anti-reflection of the light rays of the first wave band, and the reflection layer is used for reflecting the light rays of the first wave band and the second wave band. By arranging the anti-reflection layer and the reflection layer on two sides of the fluorescence conversion layer, the transmission of the laser light of the first wave band can be increased to excite the fluorescence conversion layer, and the fluorescence of the second wave band emitted by the excitation of the fluorescence conversion layer is reflected towards the direction of the dichroic mirror, so that more fluorescence is utilized.

In some embodiments of the invention, the fluorescence conversion component further comprises: a heat conducting layer and a connection layer. The heat conducting layer rapidly conducts heat generated by the laser excitation points to the whole fluorescence conversion layer sheet, so that the heat dissipation capacity is improved. The connecting layer is used for connecting the heat dissipation component. When the fluorescent conversion component is connected with the heat dissipation component by adopting different connection modes, the connection layer can be made of different materials.

In some embodiments of the present invention, the heat dissipation component may be a metal heat dissipation device, an air cooling device, a liquid cooling device, or a semiconductor cooling device, so as to perform efficient heat dissipation on the fluorescence conversion component.

In some embodiments of the invention, the connection layer comprises: a solder mask layer and a first solder layer. The heat dissipation component can adopt a semiconductor refrigeration device. The semiconductor refrigeration device includes: the semiconductor device comprises a second welding layer, a first heat conducting sheet, a second heat conducting sheet, a plurality of semiconductor thermocouples and a radiator. The second welding layer is used for welding with the first welding layer. The semiconductor thermocouple is composed of a P-type semiconductor and an N-type semiconductor, and a semiconductor set composed of a plurality of thermocouples. The P-type semiconductor and the N-type semiconductor are connected into a complete series loop by a metal conductor with good conductivity. The two sides of the semiconductor thermocouple are provided with a first heat-conducting fin and a second heat-conducting fin. After the power supply is connected, due to the semiconductor refrigeration principle, one end close to the fluorescence conversion component is a refrigeration end, the other end is a heat release end, and the heat release end is connected with a radiator, so that the fluorescence conversion component can be efficiently radiated. The heat radiator may be a metal heat sink, or may be a heat sink such as an air-cooled heat sink or a liquid-cooled heat sink, which is not limited herein.

In some embodiments of the present invention, the light source device further comprises: the device comprises a focusing lens group positioned between the dichroic mirror and the dynamic optical component, a collimating lens group positioned between the laser light source array and the dichroic mirror, a light homogenizing layer positioned between the collimating lens group and the dichroic mirror, a converging lens group positioned on a reflection path of the dichroic mirror, and a light homogenizing component positioned on one side of the converging lens group, which is far away from the dichroic mirror.

In some embodiments of the invention, the light-transmissive portion of the dynamic optical component comprises a first filter portion and a second filter portion. The first filtering part is used for transmitting the light rays of the first wave band and the first sub-wave band and reflecting the light rays of the second sub-wave band; the second filtering part is used for transmitting the light rays of the first wave band and the second sub-wave band and reflecting the light rays of the first sub-wave band; the reflecting part in the dynamic optical component is used for reflecting the light ray of the first wave band.

In some embodiments of the present invention, the light source device further comprises: and a dynamic filtering component located on the reflection path of the dichroic mirror. The dynamic optical component includes a transmissive portion and a reflective portion. The dynamic filter member includes a light-transmitting portion, a third filter portion, and a fourth filter portion. The third filtering part is used for filtering the light rays emitting the first sub-wave band, and the fourth filtering part is used for filtering the light rays emitting the second sub-wave band; the light-transmitting part is used for transmitting the light of the first wave band. The provision of a dynamic filter component in the light source arrangement may simplify the design of the dynamic optical component.

In some embodiments of the present invention, a projection system includes any of the light source devices, a light valve modulation component, and a projection lens. The light valve modulation component is positioned on the light emitting side of the light source device, and the projection lens is positioned on the reflection light path of the light valve modulation component.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a light source device in the related art;

FIG. 2 is a schematic side view of the phosphor wheel of FIG. 1;

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

FIG. 4 is a schematic diagram of a planar structure of a dynamic optical component according to an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of a fluorescence conversion member according to an embodiment of the present invention;

FIG. 6 is a second schematic cross-sectional view of a fluorescence conversion member according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a heat dissipation component according to an embodiment of the present invention;

fig. 8 is a second schematic structural diagram of a light source device according to an embodiment of the present invention;

fig. 9 is a schematic diagram illustrating a spectral transmittance of a first filter portion according to an embodiment of the present invention;

fig. 10 is a schematic diagram showing a spectral transmittance of a second filter portion according to an embodiment of the present invention;

fig. 11 is a third schematic structural diagram of a light source device according to an embodiment of the present invention;

FIG. 12 is a fourth schematic structural diagram of a light source device according to an embodiment of the present invention;

fig. 13 is a fifth schematic structural view of a light source device according to an embodiment of the present invention;

fig. 14 is a sixth schematic structural view of a light source device according to an embodiment of the present invention;

FIG. 15 is a second schematic diagram illustrating a planar structure of a dynamic optical component according to an embodiment of the present invention;

FIG. 16 is a schematic diagram illustrating a planar structure of a dynamic filtering component according to an embodiment of the present invention;

fig. 17 is a schematic structural diagram of a projection system according to an embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, the present invention is further described with reference to the accompanying drawings and examples. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted. The words expressing the position and direction described in the present invention are illustrated in the accompanying drawings, but may be changed as required and still be within the scope of the present invention. The drawings of the present invention are for illustrative purposes only and do not represent true scale.

Projection display is a technique in which a light source is controlled by plane image information, and an image is enlarged and displayed on a projection screen using an optical system and a projection space. With the development of projection display technology, projection display is gradually applied to the fields of business activities, conference exhibition, scientific education, military command, traffic management, centralized monitoring, advertising and entertainment and the like, and the advantages of large display screen size, clear display and the like are also suitable for the requirement of large-screen display.

Laser is applied to the field of projection display because of the advantages of high brightness, strong monochromaticity, wide color gamut and the like, and three-color light is emitted in the mode that high-energy laser excites a fluorescent powder wheel to emit light in the existing laser projection system.

Fig. 1 is a schematic structural diagram of a light source device in the related art.

As shown in fig. 1, a laser array 11 in a light source device emits a blue laser beam, which is focused to irradiate a phosphor wheel 12, and the phosphor wheel 12 has a reflection portion and a transmission portion, and the reflection portion is coated with a phosphor layer. The first lens group 13a is arranged in front of the fluorescent powder wheel 12, and the first lens group 13a has dual functions of focusing and collimating, so that laser beams can be converged into a smaller spot.

When the phosphor wheel 12 is driven to rotate to the position of the reflection portion, the blue laser spot is irradiated on the phosphor layer of the reflection portion of the phosphor wheel 12 to excite the fluorescence, the fluorescence is reflected by the substrate surface and collimated by the first lens group 13a, converted into parallel light beams to be emitted, reflected by the dichroic mirror 14 to the color filter part 15 to be filtered, and the red and green fluorescence bands are outputted in time sequence.

When the fluorescent powder wheel 12 is driven to rotate to the position of the transmission part, blue laser is transmitted, the blue laser is focused through the first lens group 13a and then is also diverged, according to the property of reversible light path, the blue laser reaches the transmission part of the fluorescent powder wheel 12 and needs to be collimated through the second lens group 13b to be transmitted in parallel light beams, and finally enters the transmission part of the color filter component 15 through the optical circuit to output blue laser wave bands.

Fig. 2 is a schematic side view of the phosphor wheel of fig. 1.

As shown in fig. 2, the phosphor wheel 12 includes a phosphor layer 121, a reflective substrate 122 having a reflective function, and a driving part 123. Due to the high laser energy density, the phosphor wheel 12 needs to be driven to rotate at a high speed to prevent the phosphor wheel 12 from being damaged by the high-energy laser in the specific implementation. In addition, the phosphor wheel 12 must be rotated at high speeds to match the imaging needs.

On the other hand, in order to achieve a smaller optical expansion and higher optical system efficiency, the area of the laser spot irradiated on the surface of the phosphor layer is also strictly controlled, so that in a certain illumination system, a laser beam with high energy density generates a large amount of heat in a unit time when irradiating the phosphor layer, which causes the temperature of the phosphor layer to rapidly rise, and causes the fluorescence conversion efficiency to decrease. Therefore, the phosphor wheel 12 must be designed to have a certain size to improve its heat dissipation capability, thereby ensuring the phosphor conversion efficiency within a reasonable range.

Therefore, the current light source device has the following problems: firstly, the light source system is complicated, the number of blue light loop lenses is large, and the size of the fluorescent powder wheel is large due to the heat dissipation and high-speed rotation requirements of the fluorescent powder wheel, so that the light source structure size is large due to the need of strong structural support and large installation space. Secondly, since the phosphor cannot be directly applied to the phosphor wheel, a certain carrier needs to be mixed to fix the phosphor on the reflective substrate 122. At present, the common carriers are silica gel, glass and ceramic, wherein the silica gel fluorescent material can resist the temperature of about 150 ℃, the glass fluorescent material can resist the temperature of about 180 ℃, and the ceramic fluorescent material can resist the temperature of about 250 ℃. Although the ceramic fluorescent material has the most excellent performance, the fixing scheme is still limited to the application of adhesive bonding or mechanical structure fixing on the reflective substrate, the heat cannot be rapidly dissipated under the irradiation of laser with higher power, and the conversion efficiency of the ceramic fluorescent material is reduced due to the overhigh temperature, which affects the optical output. And for the ceramic fluorescent material, the technical difficulty is high and the cost is high when the ceramic fluorescent material is installed in a welding mode. Thirdly, the existing fluorescent powder wheel has complex components and higher production process requirements, which leads to higher cost.

In view of this, embodiments of the present invention provide a light source apparatus, which adopts a fixed fluorescent conversion component and a new design of light path and heat dissipation scheme to achieve stable optical performance and high efficiency output under a certain laser power.

Fig. 3 is a schematic structural diagram of a light source device according to an embodiment of the present invention.

As shown in fig. 3, the light source device provided in the embodiment of the present invention includes: laser light source array 201, dichroic mirror 202, dynamic optical component 203, fluorescence conversion component 204, and heat dissipation component 205.

The laser light source array 201 is configured to emit laser light of a first wavelength band, in an embodiment of the present invention, the laser light source array 201 may emit blue laser light, and the first wavelength band may be 420nm to 470 nm. The laser light source array 201 may be a laser array, or may be a laser including a plurality of laser light sources, such as an MCL laser, which is not limited herein.

The dichroic mirror 202 is arranged on the light-emitting path of the laser light source array 201. The dichroic mirror is formed by coating a film on the surface of a transparent flat plate by utilizing the thin film interference principle, and can reflect light of different wave bands according to the required anti-reflection or increase.

In the embodiment of the invention, as shown in fig. 3, the dichroic mirror 202 includes a first portion 2021 and a second portion 2022, and different portions of the dichroic mirror 202 may adopt different coating processes for anti-reflecting or increasing and reflecting light in different wavelength bands. The first portion 2021 is configured to transmit light of a first wavelength band, and the second portion 2022 is configured to reflect light of the first wavelength band and light of a second wavelength band.

It should be noted that, when the first portion or the second portion of the dichroic mirror has an anti-reflection effect on the light of the specific wavelength band, the first portion or the second portion has an anti-reflection effect on the light of other wavelength bands except the specific wavelength band; similarly, when the first portion or the second portion has an anti-reflection effect on the light of the specific wavelength band, the first portion or the second portion has an anti-reflection effect on the light of other wavelength bands except the specific wavelength band. Then the first portion 2021 has the effect of transmitting light of the first wavelength band and reflecting light of the second wavelength band. Therefore, the first portion 2021 and the second portion 2022 both have the function of reflecting the light of the second wavelength band.

Specifically, the first wavelength band laser light emitted by the laser light source array 201 may be transmitted through the first portion 2021 of the dichroic mirror 202 to excite the fluorescence conversion component 204, and the second wavelength band light emitted by the excitation of the fluorescence conversion component 204 may be reflected by the first portion 2021 and the second portion 2022 of the dichroic mirror 202. The light of the second wavelength band excited and emitted by the fluorescence conversion component 204 may be yellow light, and the second wavelength band may be 500nm to 630 nm. The yellow light includes red light and green light wavelength bands, and the light source device can emit red light, green light and blue light by matching with the filter member, thereby realizing the emission of tricolor light of the light source device.

The dynamic optical component 203 is located on the side of the dichroic mirror 202 facing away from the laser light source array 201. Fig. 4 is a schematic plan view of a dynamic optical component according to an embodiment of the present invention.

As shown in fig. 4, the dynamic optical component includes a reflection portion 2031 and a transmission portion 2032, and the dynamic optical component 203 further includes a driving element which can drive the dynamic optical component 203 to move, so that the laser light can be incident on the reflection portion 2031 and the transmission portion 2032 in a time-sharing manner. When the laser light enters the reflection portion 2031, the laser light is reflected to the dichroic mirror 202 and is further reflected in the set direction by the dichroic mirror 202; when the laser light is incident on the transmission portion 2032, the laser light may be incident on the fluorescence conversion member 204 to excite the fluorescence conversion member 204 to emit fluorescence, and the fluorescence emitted by the excitation is reflected to the dichroic mirror 202 and further reflected by the dichroic mirror 202 in the set direction. Therefore, the light with different colors can be output in a time sequence in the set direction, and the emission of the tricolor light is realized.

The dynamic optical component 203 can be switched between the reflection portion 2031 and the transmission portion 2032 by rotation, linear reciprocation, or electrical conversion. Fig. 4 is only an example of driving the dynamic optical component 203 in a rotating manner, and in practical applications, different movement manners may be adopted according to structural requirements, and are not limited herein.

As shown in fig. 3, a focusing lens group 206 is provided between the dichroic mirror 202 and the dynamic optical component 203, and the laser light emitted from the dichroic mirror 202 can be focused and irradiated onto the dynamic optical component 203. The focusing lens group 206 includes at least one lens, and in an embodiment of the present invention, the focusing lens group 206 may include two lenses, which is not limited herein.

The fluorescence conversion component 204 is located on a side of the dynamic optical component 203 away from the dichroic mirror 202, and the fluorescence conversion component 204 is configured to emit light of the second wavelength band under excitation of light of the first wavelength band. The light of the first wavelength band may be blue light, and the light of the second wavelength band may be yellow light.

Fig. 5 is a schematic cross-sectional view of a fluorescence conversion member according to an embodiment of the present invention.

As shown in fig. 5, the fluorescence conversion member includes: phosphor conversion layer 2041, antireflective layer 2042, and reflective layer 2043.

The fluorescence conversion layer 2041 serves as a core film layer in the fluorescence conversion component and is used for emitting light of a second wavelength band under the excitation of light of a first wavelength band. The fluorescent conversion layer may be a fluorescent ceramic formed by sintering YAG matrix phosphor and a ceramic material at a high temperature, a ceramic fluorescent material formed by a manufacturing process such as crystal growth, or a single crystal fluorescent material, which is not limited herein. The thickness of the fluorescence conversion layer 2041 is between 0.05mm and 1 mm.

Antireflective layer 2042 is located on the side of phosphor conversion layer 2041 facing dynamic optical component 203. Antireflection layer 2042 is used for antireflection of light rays of the first wavelength band, and specifically, by adopting a coating process, antireflection layer 2042 has a reflection reducing effect in a wavelength band spectrum range of 420nm to 470nm, so that transmission of blue laser is increased. The thickness of anti-reflection layer 2042 is 0.5 μm to 10 μm, which is not limited herein.

Reflective layer 2043 is located on the side of phosphor conversion layer 2041 facing away from antireflective layer 2042. The reflective layer 2043 is used for reflecting light of the first wavelength band and the second wavelength band, specifically, the reflective layer 2043 may be a dielectric film or a metal film, the thickness of the reflective layer 2043 is between 0.5 μm and 10 μm, and the reflective layer has a high reflectivity for visible light in a wavelength band spectrum range of 420nm to 680 nm. To ensure the reflection efficiency, the reflective layer 2043 may be a dielectric film.

By disposing the anti-reflection layer 2042 and the reflection layer 2043 on both sides of the fluorescence conversion layer 2041, it is possible to increase the transmission of the laser light of the first wavelength band to excite the fluorescence conversion layer, and to reflect the fluorescence of the second wavelength band, which is excited and emitted by the fluorescence conversion layer, toward the dichroic mirror, so that more fluorescence is utilized.

The fluorescent conversion part 204 adopted by the embodiment of the invention is a fixed fluorescent conversion part, a driving element in a fluorescent powder wheel scheme is removed in the fixed fluorescent conversion scheme, and the fixed fluorescent conversion scheme is fixedly assembled in a light source device system, so that the system reliability can be greatly improved, no mechanical movement exists, and the structural design size of the light source device can be reduced. The fluorescent material is reduced to a small-area square or circular area from the original annular area, so that the use amount of the used fluorescent material is greatly reduced, and the material cost is reduced. In addition, the fixed fluorescent conversion member can be subjected to concentrated heat dissipation without dynamic restriction of high-speed rotation.

As shown in fig. 3, the light source device further includes a heat dissipation member 205, the heat dissipation member 205 is located on a side of the fluorescence conversion member 204 away from the dynamic optical member 203, and the heat dissipation member is used for dissipating heat of the fluorescence conversion member.

In practical applications, the heat dissipation component 205 can be a metal heat dissipation device, an air cooling device, a liquid cooling device, or a semiconductor cooling device, and can perform efficient heat dissipation on the fluorescent conversion component 204.

Fig. 6 is a second schematic cross-sectional view of a fluorescence conversion member according to an embodiment of the present invention.

In some embodiments, as shown in fig. 6, the fluorescence conversion component further comprises: thermally conductive layer 2044 and connecting layer 2045.

The heat conducting layer 2044 is located on the side of the reflective layer 2043 facing away from the phosphor conversion layer 2041. The heat conductive layer 2044 is provided on the surface of the reflective layer 2043 to rapidly conduct heat generated by the laser excitation point to the entire phosphor conversion layer sheet, thereby increasing heat dissipation capability. The heat conducting layer 2044 may be a metal layer with high heat conducting efficiency, including a high heat conducting metal material such as a copper layer or a gold layer, and the thickness of the metal layer is 0.1 μm to 1000 μm, but is not limited thereto, and in view of cost, a copper layer may be selected and the thickness of the metal layer is 10 μm to 200 μm.

The connecting layer 2045 is located on a side of the heat conducting layer 2044 facing away from the reflective layer 2043, and the connecting layer 2045 is used for connecting the heat sink 205. When the fluorescent conversion member 204 is connected to the heat sink member 205 by different connection methods, the connection layer 2045 may be made of different materials. In some embodiments, the connecting layer 2045 may be mechanically fixed to the heat sink 205 using thermally conductive silicone grease. In some embodiments, the connecting layer 2045 may be packaged by glue mixing and coating on the surface of the substrate, or by mechanical fixing, or by bonding, or by sintering and packaging the ceramic fluorescent material at high temperature, or by welding to connect the heat dissipation component 205.

The embodiment of the invention exemplifies the structures of the connecting layer 2045 and the heat dissipation component 205 by using a welding manner as an example.

As shown in fig. 6, the connection layer 2045 includes: solder mask 20451 and first solder layer 20452.

The solder mask 20451 is located on a side of the heat conductive layer 2044 facing away from the reflective layer 2043, the first solder layer 20452 is located on a side of the solder mask 20451 facing away from the heat conductive layer 2044, and the first solder layer 20452 is used to solder the heat sink 205. In the embodiment of the present invention, the heat conducting layer 2044 may be a copper layer, and a solder mask 20451 is further plated on the copper layer, and the solder mask 20451 may be a metal nickel layer or a titanium layer, and may be a nickel layer with higher heat conducting capability, and the thickness of the nickel layer is 0.1 μm to 5 μm. The first welding layer 20452 is arranged at the lowest part of the fluorescence conversion component, and the first welding layer 20452 is a weldable metal layer, can be a gold layer, and has a thickness of 0.1-2 μm.

Fig. 7 is a schematic structural diagram of a heat dissipation component according to an embodiment of the present invention.

In some embodiments, as shown in fig. 7, the heat dissipation member may employ a semiconductor refrigeration device. Specifically, the semiconductor refrigeration device includes: a second solder layer 2051, a first thermally conductive sheet 2052, a second thermally conductive sheet 2053, a plurality of semiconductor thermocouples 2054, and a heat sink 2057.

A second weld layer 2051 is located on a side adjacent the first weld layer 20452, the second weld layer 2051 being adapted to be welded to the first weld layer 20452. The second welding layer 2051 may be a nickel layer or a titanium-platinum layer, and is connected to the fluorescent conversion part 204 by welding.

The semiconductor thermocouple 2054 is composed of a P-type semiconductor and an N-type semiconductor, and the embodiment of the present invention includes a semiconductor assembly composed of a plurality of thermocouples. The P-type semiconductor and the N-type semiconductor are connected to form a complete series circuit by a metal conductor 2055 with good conductivity, the metal conductor 2055 can be copper, aluminum or other metal conductors, and copper can be selected in the embodiment of the invention.

A first heat-conductive sheet 2052 and a second heat-conductive sheet 2053 are provided on both sides of the semiconductor thermocouple 2054. The first heat-conducting fin 2052 and the second heat-conducting fin 2053 may be made of insulating ceramic sheets with good heat conductivity. After the power supply is connected, due to the semiconductor refrigeration principle, one end close to the fluorescence conversion part is a refrigeration end, the other end is a heat release end, and the heat release end is connected with a radiator 2057, so that the fluorescence conversion part can be efficiently radiated.

In the embodiment of the present invention, the heat conducting strip and the semiconductor thermocouple may be mechanically fixed and attached by coating the heat conducting silicone grease, or may be assembled by plating a nickel layer on a specific region of the heat conducting strip and the semiconductor thermocouple by welding, which is not limited herein. The bonding portion 2056 connected between the heat conducting sheet and the metal conductor 2055 may be made of a heat conducting silicone grease, a solderable metal, or the like, which is not limited herein.

The heat sink 2057 may be a metal heat sink, or may be a heat sink such as an air-cooled heat sink or a liquid-cooled heat sink, which is not limited herein.

The embodiment of the present invention is exemplified by only using a semiconductor refrigeration device as a heat dissipation component, and in a specific implementation, the heat dissipation component may also use an air cooling device, a liquid cooling device, a metal heat dissipation device, or the like, and is selected according to actual needs, which is not limited herein.

Fig. 8 is a second schematic structural diagram of a light source device according to an embodiment of the invention.

In some embodiments, as shown in fig. 8, the laser light source array 201 includes a first laser light source bank 2011 and a second laser light source bank 2012 arranged side by side. The first laser light source group 2011 may include a plurality of laser light sources, and the second laser light source group 2012 may include a plurality of laser light sources. In the embodiment of the present invention, the first laser light source group 2011 and the second laser light source group 2012 include the same laser light source, and are both configured to emit laser light in the first wavelength band.

Accordingly, the light source device further includes a first reflector 2071 and a second reflector 2072. The dichroic mirror 202 includes two first portions and two second portions, which are alternately arranged. The two first portions are 2021a and 2021b, respectively, and the two second portions are 2022a and 2022b, respectively.

The first reflecting mirror 2071 is positioned on the light exit side of the first laser light source group 2011, and the first reflecting mirror 2071 is used for reflecting the light exiting from the first laser light source group 2011 toward one of the two first portions 2021 a. The second reflector 2072 is located on the light outgoing side of the second laser light source group 2012, and the second reflector 2072 is used for reflecting the outgoing light of the second laser light source group 2012 to the other first portion 2021b of the two first portions.

The laser beams emitted from the first laser light source group 2011 and the second laser light source group 2012 can be regarded as one laser spot when being incident on the corresponding reflecting mirror, and therefore, the size of the first reflecting mirror 2071 and the second reflecting mirror 2072 needs to be larger than that of the incident laser spot, and by setting the first reflecting mirror 2071 and the second reflecting mirror 2072 to an appropriate angle, the laser beams emitted from the first laser light source group 2011 can be reflected by the first reflecting mirror 2071 and then be incident on the first part 2021a, and the laser beams emitted from the second laser light source group 2012 can be reflected by the second reflecting mirror 2072 and then be incident on the first part 2021 b.

The principle of the light source device emitting light rays of different wave bands according to a set time sequence will be specifically described below.

As shown in fig. 4, the light-transmitting portion 2032 in the dynamic optical member 203 includes a first filter 2032r and a second filter 2032 g; the light of the second wavelength band is yellow light, and the second wavelength band may include a first sub-wavelength band and a second sub-wavelength band; the light of the first sub-wave band is red light, and the light of the second sub-wave band is green light.

The first filtering portion 2032r for transmitting light of the first wavelength band (blue) and the first sub-wavelength band (red) and reflecting light of the second sub-wavelength band (green); the second filtering portion 2032g is used for transmitting the light of the first wavelength band (blue) and the light of the second sub-wavelength band (green) and reflecting the light of the first sub-wavelength band (red); the reflecting portion 2031 in the dynamic optical component 203 is used to reflect light of the first wavelength band (blue).

Specifically, the thickness of the first filter portion 2032r is in the range of 0.1mm to 5mm, and the first filter portion is provided with the properties as shown in fig. 9 by plating: the LED light source transmits light of 420-470 nm, reflects light of 470-590 nm and transmits light of more than 600nm, thereby being used for transmitting blue light and filtering red light. In addition, the multi-layer coating can also realize the transmission of blue light with small angle, and the reflected blue light with large angle can not pass through. The thickness of the second filter 2032g is in the range of 0.1mm to 5mm, and the second filter is made to have the properties as shown in fig. 10 by plating: the LED lamp transmits light of 420-470 nm, reflects light of 470-490 nm, transmits light of 500-590 nm, reflects light above 600nm, and is used for transmitting blue light and filtering out green light. Similarly, the multi-layer coating can also realize the transmission of blue light with small angle, but the reflected blue light with large angle can not pass through. The thickness of the reflection portion 2031 is 0.1mm to 5mm, and light of 420nm to 470nm can be reflected by the plating film, thereby reflecting blue light.

In specific implementation, since the blue laser light is excitation light and has energy much higher than that of the stimulated emission fluorescence, the areas of the first filtering portion 2032r and the second filtering portion 2032g are both larger than the area of the reflecting portion 2031. Since the light source device generally requires green light having high energy, the area of the second filter 2032g for filtering out green light may be larger than the area of the first filter 2032r for filtering out red light.

As shown in fig. 8, the blue laser light emitted from the laser light source array 201 is reflected by the first and second reflection mirrors 2071 and 2072, enters the

first portions

2021a and 2021b of the dichroic mirror, is focused by the focusing lens group 206, and is irradiated onto the dynamic optical component 203.

When the dynamic optical component 203 moves to the reflection portion 2031, the blue laser light enters the reflection portion 2031, is reflected to the

second portions

2022a and 2022b of the dichroic mirror, and is emitted in the set direction by being reflected therefrom.

When the dynamic optical component 203 moves to the first filter portion 2032r, the blue laser beam passes through the first filter portion 2032r and is irradiated to the fluorescence conversion component 204, and excites the fluorescence conversion component 204 to emit fluorescence (yellow light), and the fluorescence is reflected by the reflective layer 2043, then filtered by the first filter portion 2032r, and red fluorescence is emitted to the dichroic mirror 202, and is reflected by the dichroic mirror to be emitted in a predetermined direction.

When the dynamic optical component 203 moves to the second filter portion 2032g, the blue laser beam passes through the second filter portion 2032g and is irradiated to the fluorescence conversion component 204, and excites the fluorescence conversion component 204 to emit fluorescence (yellow light), and the fluorescence is reflected by the reflective layer 2043, then filtered by the second filter portion 2032g, and green fluorescence is emitted to the dichroic mirror 202, and is reflected by the dichroic mirror to be emitted in a predetermined direction.

Thereby, the tricolor light is emitted in time sequence for image display.

Fig. 11 is a third schematic structural diagram of a light source device according to an embodiment of the present invention.

As shown in fig. 11, the light source device further includes: and a collimating lens group 208 positioned between the laser light source array 201 and the dichroic mirror 202. The collimating lens group 208 is used for collimating and shaping the laser emitted by the laser light source array 201 to reduce the laser spot size. The collimating lens group 208 may include at least one lens, and in an embodiment of the present invention, the collimating lens group 208 includes two lenses.

Fig. 12 is a fourth schematic structural diagram of a light source device according to an embodiment of the present invention.

As shown in fig. 12, the light source device further includes: a dodging layer 209 located between the collimating lens group 208 and the dichroic mirror 202. The laser light source array 201 emits high laser energy, and in order to avoid the problem of laser speckle and avoid the reduction of the fluorescence conversion efficiency caused by the overhigh laser energy entering the fluorescence conversion component, a light homogenizing layer 209 is arranged in the light path to homogenize the laser. In a specific implementation, the light homogenizing layer 209 may be a diffusion sheet, and is not limited herein.

Fig. 13 is a fifth schematic structural view of a light source device according to an embodiment of the invention.

As shown in fig. 13, the light source device further includes: a converging lens group 210 located on the reflection path of the dichroic mirror 202, and a light unifying member 211 located on the side of the converging lens group 210 facing away from the dichroic mirror 202.

Since the tricolor light output by the dichroic mirror 202 in time sequence needs to be further homogenized and then enter the display component, the light homogenizing component 211 is arranged at the light outlet of the light source device, and the converging lens group 210 is arranged in front of the light homogenizing component 211 to converge the light emitted by the dichroic mirror, so that as much light as possible enters the light homogenizing component 211 to be utilized.

In specific implementation, the light homogenizing part 211 can adopt a light bar, a light guide pipe and the like; the converging lens group 210 includes at least one lens, which is not limited herein.

Fig. 14 is a sixth schematic structural view of a light source device according to an embodiment of the present invention.

In some embodiments, as shown in fig. 14, the light source device further includes: a dynamic filtering component 212. The dynamic filtering part 212 is located on the reflection path of the dichroic mirror 202, and may be specifically disposed between the condensing lens group 210 and the dodging part 211. Accordingly, the dynamic optical member 203 may include only the reflective portion 2031 and the transmissive portion 2032, and need not have a filter function.

FIG. 15 is a second schematic diagram illustrating a planar structure of a dynamic optical component according to an embodiment of the present invention; fig. 16 is a schematic plan view of a dynamic filter component according to an embodiment of the present invention.

Specifically, as shown in fig. 15, the dynamic optical member includes a reflection portion 2031 and a transmission portion 2032, wherein the area of the reflection portion 2031 is smaller than the area of the transmission portion 2032. The reflective portion 2031 is configured to reflect the laser light of the first wavelength band, and the transmissive portion 2032 is configured to transmit the fluorescence emitted by the excitation of the second wavelength band.

Accordingly, as shown in fig. 16, the dynamic filter component 212 includes a light-transmitting portion 2121, a third filter portion 2122r, and a fourth filter portion 2122 g. In the embodiment of the present invention, the light of the second wavelength band is yellow light, and the second wavelength band may include a first sub-wavelength band and a second sub-wavelength band; the light of the first sub-wave band is red light, and the light of the second sub-wave band is green light.

The third filter 2122r is used for filtering the light emitting in the first sub-wavelength band (red), and the fourth filter 2122g is used for filtering the light emitting in the second sub-wavelength band (green); the light-transmitting portion 2121 serves to transmit light of the first wavelength band.

The third filter portion 2122r and the fourth filter portion 2122g may be coated to increase the transmittance of light in a specific wavelength band and increase the transmittance of light in other wavelength bands. The light-transmitting part 2121 is made of transparent homogenizing material with certain diffusion effect, so that it has certain homogenizing effect on blue laser.

Since the blue laser light is excitation light having energy much higher than that of the fluorescence emitted by the excitation, the areas of the third filter 2122r and the fourth filter 2122g are both larger than the area of the light-transmitting portion 2121. While the light source device generally requires green light of higher energy, the area of the fourth filter portion 2122g for filtering out green light may be larger than that of the third filter portion 2122r for filtering out red light.

The dynamic optical filter component 212 is disposed in the light source device, so as to simplify the design of the dynamic optical component 203, and in the implementation, the dynamic optical filter component 212 and the dynamic optical component 203 need to be driven synchronously. The dynamic optical filter component 212 and the dynamic optical component 203 in the embodiment of the invention are illustrated in the form of a wheel, but the invention is not limited to the scheme of high-speed rotation, and the schemes including high-frequency movement, electrical conversion and light transmission, etc. are all within the scope of the invention.

Based on the same inventive concept, an embodiment of the present invention further provides a projection system, and fig. 17 is a schematic structural diagram of the projection system provided in the embodiment of the present invention.

As shown in fig. 17, the projection system includes any of the light source devices 100 described above, a light valve modulating member 200, and a projection lens 300. The light valve modulating member 200 is located on the light emitting side of the light source device 100, and the projection lens 300 is located on the reflection light path of the light valve modulating member 200.

The light source device 100 adopts a fixed fluorescent conversion part, a driving element in a fluorescent powder wheel scheme is removed in the fixed fluorescent conversion scheme, and the fixed fluorescent conversion scheme is fixedly assembled in a light source device system, so that the system reliability can be greatly improved, no mechanical movement exists, and the structural design size of the light source device can be reduced. The fluorescent material is reduced to a small-area square or circular area from the original annular area, so that the use amount of the used fluorescent material is greatly reduced, and the material cost is reduced. In addition, the fixed fluorescent conversion member can be subjected to concentrated heat dissipation without dynamic restriction of high-speed rotation.

The light valve modulating unit 200 is used to modulate and reflect the incident light. In an embodiment, the light valve modulation component 200 may employ a Digital Micromirror (DMD). The DMD surface includes thousands of minute mirrors, each of which can be individually driven to deflect, and the reflected light is made incident on the projection lens 300 by controlling the deflection angle of the DMD.

The projection lens 300 is used for imaging the outgoing light of the light valve modulation component 200, and is used for projection imaging after being imaged by the projection lens 300.

According to the first inventive concept, a light source apparatus includes: the device comprises a laser light source array, a dichroic mirror, a dynamic optical component, a fluorescence conversion component and a heat dissipation component. The laser light source array emits laser to excite the fluorescence conversion component to emit fluorescence so as to realize the emission of tricolor light. The fluorescent conversion part adopts a fixed fluorescent conversion part, a driving element in a fluorescent powder wheel scheme is removed in the fixed fluorescent conversion scheme, and the fixed fluorescent conversion part is fixedly assembled in a light source device system, so that the system reliability can be greatly improved, no mechanical movement exists, and the structural design size of the light source device can be reduced. The fluorescent material is reduced to a small-area square or circular area from the original annular area, so that the use amount of the used fluorescent material is greatly reduced, and the material cost is reduced. In addition, the fixed fluorescent conversion member can be subjected to concentrated heat dissipation without dynamic restriction of high-speed rotation. And the compact optical path is adopted to realize stable and efficient optical performance output under certain laser power.

According to a second inventive concept, the laser light source array includes a first laser light source group and a second laser light source group arranged side by side. The first laser light source group may include a plurality of laser light sources, the second laser light source group may include a plurality of laser light sources, and the first laser light source group and the second laser light source group include the same laser light source and are both configured to emit laser light of the first wavelength band.

According to the third inventive concept, a dichroic mirror is disposed on a light emitting path of the laser light source array. The dichroic mirror is formed by coating a film on the surface of a transparent flat plate by utilizing the thin film interference principle, and can reflect light of different wave bands according to the required anti-reflection or increase. The dichroic mirror comprises a first part and a second part, and different parts of the dichroic mirror can be used for anti-reflection or increasing and reflecting light rays with different wave bands by adopting different coating processes. The first part is used for transmitting light rays in a first wave band, and the second part is used for reflecting the light rays in the first wave band and a second wave band.

According to the fourth inventive concept, the light source device further includes a first reflecting mirror and a second reflecting mirror. The dichroic mirror includes two first portions and two second portions, the first portions and the second portions being alternately arranged. The first reflector is positioned on the light outlet side of the first laser light source group and used for reflecting the emergent light of the first laser light source group to one of the two first parts. The second reflector is positioned on the light-emitting side of the second laser light source group and used for reflecting the emergent light of the second laser light source group to the other first part of the two first parts. By setting the first reflector and the second reflector to be at proper angles, the laser emitted by the first laser light source group can be reflected by the first reflector and then enters one of the first parts, and the laser emitted by the second laser light source group can be reflected by the second reflector and then enters the other first part.

According to the fifth inventive concept, the dynamic optical member includes a reflection portion and a transmission portion, and further includes a driving element that can drive the dynamic optical member to move so that the laser light can be incident to the reflection portion and the transmission portion at a time division. When the laser light enters the reflection unit, the laser light is reflected by the dichroic mirror and is further reflected by the dichroic mirror in the set direction. When the laser is incident to the transmission part, the laser can be incident to the fluorescence conversion part to excite the fluorescence conversion part to emit fluorescence, and the fluorescence emitted by excitation is reflected to the dichroic mirror and then reflected to the set direction by the dichroic mirror. Therefore, the light with different colors can be output in a time sequence in the set direction, and the emission of the tricolor light is realized. The dynamic optical component can realize the switching between the reflecting part and the transmitting part by adopting the modes of rotation, linear reciprocating motion, electric conversion and light transmission and the like.

According to a sixth inventive concept, the light of the first wavelength band is blue light, the second wavelength band includes a first sub-wavelength band and a second sub-wavelength band, the light of the first sub-wavelength band is red light, and the light of the second sub-wavelength band is green light.

According to the seventh inventive concept, the fluorescence conversion part includes: a fluorescence conversion layer, an anti-reflection layer and a reflection layer. The fluorescence conversion layer is used for emitting light of a second wave band under the excitation of the light of the first wave band. The anti-reflection layer is used for anti-reflection of the light rays of the first wave band, and the reflection layer is used for reflecting the light rays of the first wave band and the second wave band. By arranging the anti-reflection layer and the reflection layer on two sides of the fluorescence conversion layer, the transmission of the laser light of the first wave band can be increased to excite the fluorescence conversion layer, and the fluorescence of the second wave band emitted by the excitation of the fluorescence conversion layer is reflected towards the direction of the dichroic mirror, so that more fluorescence is utilized.

According to the eighth inventive concept, the fluorescence conversion part further includes: a heat conducting layer and a connection layer. The heat conducting layer rapidly conducts heat generated by the laser excitation points to the whole fluorescence conversion layer sheet, so that the heat dissipation capacity is improved. The connecting layer is used for connecting the heat dissipation component. When the fluorescent conversion component is connected with the heat dissipation component by adopting different connection modes, the connection layer can be made of different materials.

According to the ninth inventive concept, the heat dissipation component can adopt a metal heat dissipation device, an air cooling device, a liquid cooling device or a semiconductor refrigeration device to perform efficient heat dissipation on the fluorescence conversion component.

According to the tenth inventive concept, the connection layer includes: a solder mask layer and a first solder layer. The heat dissipation component can adopt a semiconductor refrigeration device. The semiconductor refrigeration device includes: the semiconductor device comprises a second welding layer, a first heat conducting sheet, a second heat conducting sheet, a plurality of semiconductor thermocouples and a radiator. The second welding layer is used for welding with the first welding layer. The semiconductor thermocouple is composed of a P-type semiconductor and an N-type semiconductor, and a semiconductor set composed of a plurality of thermocouples. The P-type semiconductor and the N-type semiconductor are connected into a complete series loop by a metal conductor with good conductivity. The two sides of the semiconductor thermocouple are provided with a first heat-conducting fin and a second heat-conducting fin. After the power supply is connected, due to the semiconductor refrigeration principle, one end close to the fluorescence conversion component is a refrigeration end, the other end is a heat release end, and the heat release end is connected with a radiator, so that the fluorescence conversion component can be efficiently radiated. The heat radiator may be a metal heat sink, or may be a heat sink such as an air-cooled heat sink or a liquid-cooled heat sink, which is not limited herein.

According to the eleventh inventive concept, the light source device further includes: the device comprises a focusing lens group positioned between the dichroic mirror and the dynamic optical component, a collimating lens group positioned between the laser light source array and the dichroic mirror, a light homogenizing layer positioned between the collimating lens group and the dichroic mirror, a converging lens group positioned on a reflection path of the dichroic mirror, and a light homogenizing component positioned on one side of the converging lens group, which is far away from the dichroic mirror.

According to the twelfth inventive concept, the light transmitting portion in the dynamic optical member includes a first filter portion and a second filter portion. The first filtering part is used for transmitting the light rays of the first wave band and the first sub-wave band and reflecting the light rays of the second sub-wave band; the second filtering part is used for transmitting the light rays of the first wave band and the second sub-wave band and reflecting the light rays of the first sub-wave band; the reflecting part in the dynamic optical component is used for reflecting the light ray of the first waveband.

According to the thirteenth inventive concept, the light source device further includes: and a dynamic filtering component located on the reflection path of the dichroic mirror. The dynamic optical component includes a transmissive portion and a reflective portion. The dynamic filter member includes a light-transmitting portion, a third filter portion, and a fourth filter portion. The third filtering part is used for filtering the light rays emitting the first sub-wave band, and the fourth filtering part is used for filtering the light rays emitting the second sub-wave band; the light-transmitting part is used for transmitting the light of the first wave band. The provision of a dynamic filter component in the light source arrangement may simplify the design of the dynamic optical component.

According to a fourteenth inventive concept, a projection system includes any one of the light source devices described above, a light valve modulating section, and a projection lens. The light valve modulation component is positioned on the light emitting side of the light source device, and the projection lens is positioned on the reflection light path of the light valve modulation component.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A light source device, comprising:

the laser light source array is used for emitting laser of a first wave band;

the dichroic mirror is arranged on a light emitting path of the laser light source array; the dichroic mirror comprises a first portion and a second portion, the first portion being configured to transmit light of the first wavelength band, the second portion being configured to reflect light of the first and second wavelength bands;

a dynamic optical component located on a side of the dichroic mirror facing away from the laser light source array; the dynamic optical component includes a reflective portion and a transmissive portion;

a fluorescence conversion component located on a side of the dynamic optical component facing away from the dichroic mirror; the fluorescence conversion component is used for emitting light rays of the second waveband under the excitation of the light of the first waveband;

a heat dissipation member located on a side of the fluorescence conversion member facing away from the dynamic optical member; the heat dissipation member is used for dissipating heat of the fluorescence conversion member.

2. The light source device according to claim 1, wherein the laser light source array includes a first laser light source group and a second laser light source group arranged side by side;

the light source device further comprises a first reflector and a second reflector; the first reflector is positioned on the light-emitting side of the first laser light source group, and the second reflector is positioned on the light-emitting side of the second laser light source group;

the dichroic mirror includes two of the first portions and two of the second portions, the first portions and the second portions being alternately arranged; the first reflector reflects the light emitted from the first laser light source group toward one of the two first portions, and the second reflector reflects the light emitted from the second laser light source group toward the other of the two first portions.

3. The light source device according to claim 1, wherein the fluorescence conversion member includes:

the fluorescence conversion layer is used for emitting the light rays in the second waveband under the excitation of the light rays in the first waveband;

an anti-reflection layer positioned on one side of the fluorescence conversion layer facing the dynamic optical component; the anti-reflection layer is used for anti-reflection of the light rays in the first wave band;

the reflecting layer is positioned on one side, away from the anti-reflection layer, of the fluorescence conversion layer; the reflecting layer is used for reflecting the light rays of the first wave band and the second wave band.

4. The light source device according to claim 3, wherein the fluorescence conversion member further comprises:

the heat conduction layer is positioned on one side, away from the fluorescent conversion layer, of the reflection layer;

the connecting layer is positioned on one side, away from the reflecting layer, of the heat conducting layer; the connecting layer is used for connecting the heat dissipation part;

wherein the connection layer comprises:

the solder mask is positioned on one side of the heat conduction layer, which is far away from the reflection layer;

the first welding layer is positioned on one side, away from the heat conduction layer, of the solder mask layer; the first welding layer is used for welding the heat dissipation part.

5. The light source device according to claim 4, wherein the heat radiating member is a metal heat radiating device, an air cooling device, a liquid cooling device or a semiconductor cooling device;

wherein the semiconductor refrigeration device comprises:

the second welding layer is positioned on one side close to the first welding layer; the second welding layer is used for welding with the first welding layer;

the first heat conducting fin is positioned on one side, away from the first welding layer, of the second welding layer;

the second heat-conducting fin is positioned on one side, away from the second welding layer, of the first heat-conducting fin;

a plurality of semiconductor thermocouples located between the first and second thermally conductive sheets; the plurality of semiconductor thermocouples are mutually connected in series;

and the radiator is positioned on one side of the second heat-conducting fin, which is deviated from the first heat-conducting fin.

6. The light source device according to claim 1, wherein the light-transmitting portion in the dynamic optical member includes a first filter portion and a second filter portion; the second band comprises a first sub-band and a second sub-band;

the first filtering part is used for transmitting the light rays of the first wave band and the first sub-wave band and reflecting the light rays of the second sub-wave band, and the second filtering part is used for transmitting the light rays of the first wave band and the second sub-wave band and reflecting the light rays of the first sub-wave band; the reflecting part in the dynamic optical component is used for reflecting the light rays in the first wave band.

7. The light source device according to claim 1, further comprising:

a dynamic filtering component located on a reflection path of the dichroic mirror; the dynamic light filtering component comprises a third light filtering part, a fourth light filtering part and a light-transmitting part; the second band comprises a first sub-band and a second sub-band;

the third filtering part is used for filtering the light rays emitting the first sub-wave band, and the fourth filtering part is used for filtering the light rays emitting the second sub-wave band; the light-transmitting part in the dynamic light filtering component is used for transmitting the light rays in the first wave band.

8. The light source device according to claim 6 or 7, wherein the light of the first wavelength band is blue light, the light of the first sub-wavelength band is red light, and the light of the second sub-wavelength band is green light.

9. The light source device according to any one of claims 1 to 7, further comprising:

the collimating lens group is positioned between the laser light source array and the dichroic mirror;

a leveling layer; between the collimating lens group and the dichroic mirror;

a focusing lens group located between the dichroic mirror and the dynamic optical component;

a converging lens group located on a reflection path of the dichroic mirror;

and the light homogenizing component is positioned on one side of the converging lens group, which is far away from the dichroic mirror.

10. A projection system comprising the light source device according to any one of claims 1 to 9, a light valve modulating member, and a projection lens;

the light valve modulation component is positioned on the light emitting side of the light source device and used for modulating and reflecting incident light; the projection lens is positioned on a reflection light path of the light valve modulation component and is used for imaging emergent light of the light valve modulation component.