CN219590663U - Laser projection system - Google Patents

Abstract

The utility model relates to the field of projectors, and discloses a laser projection system which comprises a red laser light source module, a blue laser light source module, a green laser light source module, a mirror array assembly, a first reflecting element, a second reflecting element and a digital micro-mirror chip module. The lens array assembly is used for gathering laser beams emitted by the green laser light source module, the blue laser light source module and the red laser light source module to form projection beams; a first reflecting element including a first reflecting mirror for reflecting the projection beam; a second reflecting element comprising a second reflecting mirror, the first reflecting mirror being perpendicular to the second reflecting mirror; the second reflector is used for reflecting the projection light beam reflected by the first reflector to the digital micro-mirror chip module. All the components form a U-shaped light path system, so that the good heat dissipation effect of the U-shaped light path system is ensured while the layout structure is compact.

Description

Laser projection system

Technical Field

The utility model relates to the field of laser projectors, in particular to a laser projection system.

Background

With the development of optical projection and illumination technologies, the projection devices on the market mainly comprise bulb projection and laser projection, and the two projection devices mainly differ in output light source, wherein the bulb projection device uses a high-pressure mercury lamp as a light source, and the laser projection device uses laser as a light source. Since the life of the laser light source is longer and the color rendition is superior to that of the bulb light source, the laser projection apparatus employing the laser light source has gradually replaced the conventional bulb projection apparatus.

Currently, laser projection equipment on the market is generally provided with a laser light source device and an image processing device, wherein a lens array is arranged in the laser light source device to collect and output red, green and blue lasers. The image processing device processes the light source output by the laser light source device through the controller and then carries out corresponding projection application. A coupler is generally arranged between the laser light source device and the image processing device, and the common coupler is used for processing the light source output by the laser light source device and then transferring the processed light source to the image processing device so as to reduce the processing procedure of the image processing device and improve the projection quality.

The light path setting of the laser projection equipment in the prior art is generally complex, the light source device and the image processing device are arranged according to the trend demand of the light path, and the laser light source device generally occupies a larger installation volume than the traditional bulb projection light source device, so that the whole volume of the laser projection equipment is excessively large.

Therefore, the layout problem of the optical path system of the optical path of the laser projection device in the prior art is a problem to be solved urgently by the manufacturers of the laser projection devices at present.

Disclosure of Invention

The embodiment of the utility model aims to provide a laser projection system so as to solve the problems that the layout of a laser projection light path system is not reasonable enough and the occupied volume is overlarge in the prior art.

The utility model solves the technical problems by adopting the following technical scheme:

a laser projection system is provided, which comprises a red laser light source module, a blue laser light source module, a green laser light source module, a mirror array assembly, a first reflecting element, a second reflecting element and a digital micro-mirror chip module. The lens array assembly is used for gathering laser beams emitted by the green laser light source module, the blue laser light source module and the red laser light source module to form projection beams; a first reflecting element including a first reflecting mirror for reflecting the projection beam, the projection beam being incident on the first reflecting mirror at an angle of 45 degrees; a second reflecting element comprising a second reflecting mirror, the first reflecting mirror being perpendicular to the second reflecting mirror; the second reflector is used for reflecting the projection light beam reflected by the first reflector to the digital micro-mirror chip module.

In some embodiments, the mirror array assembly includes a third reflective element for reflecting the laser beam emitted by the green laser light source module to the first reflective element, the third reflective element including a third mirror perpendicular to the first mirror.

In some embodiments, the green laser light source module includes a first housing, a first water cooled plate and a green laser, the green laser is located in the first housing, and the first water cooled plate is disposed on the back of the green laser.

In some embodiments, the green laser light source module includes a broadband polarization beam splitter prism and two plane green laser units, where the two plane green laser units are perpendicular to each other, each plane green laser unit includes a plurality of green lasers, and the broadband polarization beam splitter prism is located between the two plane green laser units and forms an included angle of 45 degrees with each plane green laser unit.

In some embodiments, the laser projection system further comprises a mounting housing; the first shell is arranged on the installation shell, the red laser light source module and the blue laser light source module are both arranged on the installation shell, and the third reflecting element is positioned in the installation shell; the installation shell comprises radiating fins, an installation shell body and an installation shell end cover, wherein the installation shell end cover is detachably installed on the installation shell body, and the radiating fins are arranged on the installation shell body and the installation shell end cover.

In some embodiments, the red laser light source module includes a red laser mounted to the mounting housing and a second water cooled plate mounted to a back of the red laser; the blue laser light source module comprises a blue laser and a third water cooling plate, the red laser is installed on the installation shell, and the third water cooling plate is installed on the back of the blue laser.

In some embodiments, the laser projection system further comprises a speckle removal module located between the first reflective element and the second reflective element.

In some embodiments, the first housing, the mounting housing, the first reflective element, the speckle-removing module, the second reflective element, and the dmd chip module enclose a cavity; the laser projection system further comprises a circuit board, and the circuit board is arranged above the cavity.

In some embodiments, the mirror array assembly includes a fourth reflecting element, where the fourth reflecting element is configured to reflect the laser beam emitted by the red laser light source module to the first reflecting element, and the fourth reflecting element includes a fourth reflecting mirror, and the fourth reflecting mirror is perpendicular to the first reflecting mirror; the red laser light source module is closer to the first reflecting element than the green laser light source module; the laser beam emitted by the blue laser light source module sequentially passes through the third reflecting element and the fourth reflecting element and then enters the first reflecting element, and the angle of the laser beam emitted by the blue laser light source module entering the first reflecting mirror is 45 degrees.

In some embodiments, the digital micromirror chip module includes a second housing, a heat sink fin disposed on the second housing, a digital micromirror chip located in the second housing, and a fourth water-cooled plate disposed on the back of the digital micromirror chip.

Compared with the prior art, in the laser projection system provided by the embodiment of the utility model, the angle of incidence of the projection beam to the first reflecting mirror is 45 degrees, the first reflecting mirror is perpendicular to the second reflecting mirror, the second reflecting mirror is used for reflecting the projection beam reflected by the first reflecting mirror to the digital micro-mirror chip module, and by the arrangement, the mirror array assembly, the first reflecting element, the second reflecting element and the digital micro-mirror chip module form a general U-shaped laser light path layout, and the U-shaped laser light path layout structure is more compact.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

FIG. 1 is a perspective view of a laser projection system according to an embodiment of the present utility model;

FIG. 2 is a top cross-sectional view of the laser projection system shown in FIG. 1;

FIG. 3 is an exploded view of a laser light source portion of the laser projection system shown in FIG. 1;

FIG. 4 is an exploded view of a green laser source module of the laser projection system of FIG. 1;

FIG. 5 is an internal block diagram of a first water cooled plate of the laser projection system shown in FIG. 1;

FIG. 6 is a schematic diagram of an application of PBS used by the green laser source module of the laser projection system shown in FIG. 1;

FIG. 7 is a perspective view of the exterior structure of the mounting housing of the laser projection system shown in FIG. 1;

FIG. 8 is a structural perspective view of a laser light source portion of the laser projection system shown in FIG. 1;

FIG. 9 is a perspective view of a speckle reduction module of the laser projection system of FIG. 1;

FIG. 10 is a circuit board mounting schematic of the laser projection system shown in FIG. 1;

fig. 11 is a structural perspective view of a digital micromirror chip module of the laser projection system shown in fig. 1.

Detailed Description

In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It will be understood that when an element is referred to as being "connected" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. The terms "upper," "lower," "left," "right," "upper," "lower," "top," and "bottom," and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience in describing the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Referring to fig. 1 and fig. 2 together, fig. 1 is a perspective view illustrating a structure of a laser projection system according to an embodiment of the utility model, and fig. 2 is a top cross-sectional view of the laser projection system shown in fig. 1. One embodiment of the present utility model provides a laser projection system 100, which includes a red laser light source module 10, a blue laser light source module 20, a green laser light source module 30, a mirror array assembly 40, a first reflective element 50, a second reflective element 60, and a digital micromirror chip module 70. The lens array assembly 40 is configured to collect the laser beams emitted from the green laser light source module 30, the blue laser light source module 20 and the red laser light source module 10 to form projection beams; the first reflecting element 50 includes a first reflecting mirror 502 for reflecting the projection beam, and an angle at which the projection beam is incident on the first reflecting mirror 502 is 45 degrees; the second reflecting element 60 includes a second reflecting mirror 602, and the first reflecting mirror 502 is perpendicular to the second reflecting mirror 602; the second mirror 602 is configured to reflect the projection beam reflected by the first mirror 502 to the dmd 70.

The lasers generated by the red laser light source module 10, the blue laser light source module 20 and the green laser light source module 30 are primarily collected at the position of the mirror array assembly 40 to form a projection beam, the projection beam is reflected by the mirror array assembly 40 to reach the first reflecting mirror 502 of the first reflecting element 50, the projection beam is incident to the first reflecting mirror 502 with an angle of 45 degrees and then reflected by the angle of 45 degrees to reach the position of the second reflecting element 60, the projection beam is reflected again at the position of the second reflecting mirror 602 in the second reflecting element 60 to reach the digital micro-mirror chip module 70, and by the arrangement, the mirror array assembly 40, the first reflecting element 50, the second reflecting element 60 and the digital micro-mirror chip module 70 form a rough U-shaped laser light path layout, and the U-shaped laser light path layout structure is more compact.

The mirror array assembly 40 includes a third reflective element 402 and a fourth reflective element 404, the third reflective element 402 including a third mirror 4020, the third mirror 4020 being perpendicular to the first mirror 502. The fourth reflective element 404 includes a fourth mirror 4040, the fourth mirror 4040 being parallel to the third mirror 4020 and perpendicular to the first mirror 502.

The first reflecting element 50 includes a first reflecting mirror 502 and a first mounting frame 504, the first reflecting mirror 502 is mounted in the first mounting frame 504, and the first reflecting mirror 502 reflects the projection beam collected by the lens array assembly 40 to the second reflecting element 60 again.

The second reflecting element 60 includes a second reflecting mirror 602 and a second mounting frame 604, the second reflecting mirror 602 is mounted in the second mounting frame 604, the second reflecting mirror 602 reflects the projection beam reflected by the first reflecting mirror 502 to the digital micro-mirror chip module 70 for processing, and the first reflecting mirror 502 is perpendicular to the second reflecting mirror 602.

The first reflecting mirror 502 and the second reflecting mirror 602 are optical plane half lenses, and can reflect the light source of a certain color to be reflected, and the light source of other colors can pass through smoothly.

The digital micro-mirror chip module 70 includes a digital micro-mirror chip 706, and the digital micro-mirror chip 706 processes the projection beam reflected by the second mirror 602, and projects the processed projection beam out of the digital micro-mirror chip module 70 to form a final projection imaging picture.

Referring to fig. 3, fig. 3 is an exploded view of a laser light source portion of the laser projection system shown in fig. 1. In some embodiments, the mirror array assembly 40 includes a third reflective element 402, where the third reflective element 402 is configured to reflect the laser beam emitted by the green laser light source module 30 to the first reflective element 50 (see fig. 1), and the third reflective element 402 includes a third reflective mirror 4020 and a third mounting frame 4022, and the third reflective mirror 4020 is perpendicular to the first reflective mirror 502. The third reflector 4020 forms an angle of 45 degrees with the projection beam emitted by the green laser light source module 30, the third reflector 4020 is mounted in the third mounting frame 4022, a first special coating is coated on the surface of the third reflector 4020, the first special coating can reflect the green projection beam, and when the blue projection beam is incident, the blue projection beam can be transmitted to keep the original light path direction.

In some examples, the third reflector 4020 occupies only half of the plane of the third reflector 402, the other half is the first light hole 4024, and the blue projection beam passes through the first light hole 4024 directly, so that the reduction of the light intensity caused by passing through the third reflector 4020 is avoided, and the image quality of the final projection picture is improved.

Referring to fig. 4 and fig. 5 together, fig. 4 is an exploded view of a green laser light source module of the laser projection system shown in fig. 1, and fig. 5 is an internal structure diagram of a first water cooling plate of the laser projection system shown in fig. 1, wherein part of elements are omitted to show an internal structure of the first water cooling plate. In some embodiments, the green laser light source module 30 includes a first housing 302, a first water cooling plate 304, and a green laser 306, the green laser 306 is located in the first housing 302, and the first water cooling plate 304 is disposed on the back of the green laser 306. The bottom of the first housing 302 is provided with a plurality of heat dissipation fins 3020 arranged in parallel, and the heat dissipation fins 3020 increase the contact area between the first housing 302 and the air, and enhance the heat dissipation capacity of the first housing 302.

The first water cooling plate 304 and the green laser 306 are integrally designed, the first water cooling plate 304 includes a water nozzle 3042 and a first heat dissipation fin 3046, the plurality of first heat dissipation fins 3046 form a water channel 3044, the green laser 306 is electrically connected, the green laser 306 is directly mounted on the back of the first water cooling plate 304, the back of the green laser 306 is closely attached to the first water cooling plate 304 and the released heat quickly reaches the first heat dissipation fin 3046 through heat conduction, the first water cooling plate 304 further includes a cooling liquid, the cooling liquid enters the first water cooling plate 304 from the water nozzle 3042, the cooling liquid flows through the water channel 3044 in the first water cooling plate 304, when the cooling liquid flows through the water channel 3044, the heat of the green laser 306 absorbed in the first heat dissipation fin 3046 is quickly released into the cooling liquid, and finally the cooling liquid flows out of the first water cooling plate 304 from the water nozzle 3042 to complete the heat dissipation process of the green laser 306.

In some examples, the number and size of the first heat dissipating fins 3046 and the area of the water channel 3044 may be changed according to the heat emitted by the green laser 306, so that increasing the heat dissipating efficiency of the first water cooling plate 304 can provide good heat dissipation conditions for the green laser 306 with a higher power.

Referring to fig. 4 and fig. 6 together, fig. 6 is a schematic diagram of an application of a PBS laser polarization technology used by the green laser source module of the laser projection system shown in fig. 1, wherein the solid line is P light and the dotted line is S light. In some embodiments, the green laser light source is synthetically produced using the polarization characteristics of the laser light. The green laser light source module 30 further comprises a broadband polarization beam splitter prism 308, the green laser light source is synthesized by a plurality of lasers through the broadband polarization beam splitter prism 308, the green laser light source module 30 is designed as a two-sided light source, and comprises two-sided green laser units, each of the two-sided green laser units consists of a plurality of green lasers 306, the two-sided green laser units are mutually perpendicular and are designed at right angles, and the broadband polarization beam splitter prism 308 is positioned between the two-sided green laser units and forms an included angle of 45 degrees with each of the two-sided green laser units. The laser beam emitted by the green laser 306 is polarized light, the polarized light is composed of P light and S light, the two sides of the broadband polarization beam splitter prism 308 are coated with special coatings, the coating on the upper end face can reflect the P light and transmit the S light, the coating on the lower end face can transmit the P light and reflect the S light, the P light reflected on the upper end face and the P light transmitted on the lower end face are gathered together to form a projection beam, and the light energy of the gathered projection beam is twice that of a single-sided light source.

In some examples, the green laser light source module 30 may be changed to a normal single-sided laser mode according to the projected image quality requirement. When imaging by a double-sided laser, the final imaging brightness and quality of laser projection can be increased, and when imaging by a single-sided laser, the final imaging brightness and quality can be reduced, but the production cost can be reduced and the projector can be made smaller.

Referring to fig. 3 and 7, fig. 7 is a perspective view illustrating an external structure of a mounting housing of the laser projection system shown in fig. 1. In some embodiments, the laser projection system 100 further comprises a mounting housing 80; the first casing 302 is mounted on the mounting housing 80, the red laser light source module 10 and the blue laser light source module 20 are both mounted on the mounting housing 80, and the third reflective element 402 is located in the mounting housing 80; the mounting housing 80 includes a heat sink fin 802 and a mounting housing body 804, the heat sink fin 802 being disposed on the mounting housing body 804. Specifically, the mounting housing 80 includes a heat dissipation fin 802, a mounting housing body 804 and a mounting housing end cover 806, the heat dissipation fin 802 is disposed on the surfaces of the mounting housing body 804 and the mounting housing end cover 806, the mounting housing body 804 is integrally formed, the mounting housing end cover 806 is an upper end cover of the mounting housing body 804, and when the mounting housing end cover 806 is detached, the mounting housing end cover 806 is detached first, so that the inner components such as the endoscope array assembly 40 in the mounting housing 80 can be detached. The surface of the installation housing 80 is provided with a plurality of heat dissipation fins 802 parallel to each other, and the contact area between the installation housing 80 and the air is greatly increased by the heat dissipation fins 802, so that the heat generated by the components inside the installation housing 80 can be discharged into the air more quickly, and the components inside the installation housing 80 are always in a proper working environment. The third reflective element 402 is configured to reflect and collect the laser light generated by the green laser light source module 30 and form a projection beam, the number of the third reflective element 402 can be adjusted according to the green laser 306 in the green laser light source module 30, and when the projection beam requires a larger frame and energy, the number of the corresponding green laser 306 and the number of the third reflective element 402 can be increased to meet the requirement of the laser projector for image quality.

Referring to fig. 2 and 8 together, fig. 8 is a perspective view of a laser light source portion of the laser projection system shown in fig. 1. In some embodiments, the red laser light source module 10 includes a red laser 102 and a second water-cooled plate 104, and the second water-cooled plate 104 is mounted on the back of the red laser 102; the blue laser light source module 20 includes a blue laser 202 and a third water cooling plate 204, and the third water cooling plate 204 is mounted on the back of the blue laser 202. The red light laser source module 10 and the blue light laser source module 20 are composed of a common single-sided laser according to the image quality requirement of the laser projection system, and compared with the green light laser source module 30 which synthesizes the projection beam by the broadband polarization beam splitter 308, the occupied space is greatly reduced. The second water cooling plate 104 and the third water cooling plate 204 are respectively attached to the back of the red light laser 102 and the blue light laser 202, and the second water cooling plate 104, the third water cooling plate 204 and the first water cooling plate 304 have the same structure, so that the red light laser 102 and the blue light laser 202 can be always in a normal working temperature range.

Referring to fig. 1 and fig. 9 together, fig. 9 is a perspective view of a speckle eliminating module of the laser projection system shown in fig. 1. The laser projection system 100 further includes a speckle removing module 90, the speckle removing module 90 is located between the first reflective element 50 and the second reflective element 60, the speckle removing module 90 includes a connection housing 902, a speckle removing device 904, and a convex lens 906, the speckle removing device 904 and the convex lens 906 are installed in the connection housing 902, and the speckle removing device 904 includes a dynamic diffusion wheel 9040, a static diffusion plate 9042, and an optical integrator 9044. The laser light source reflected by the first reflecting element 50 is converged at the convex lens 906, the converged laser light source is diffused for the first time at the dynamic diffusion wheel 9040, then the laser light source is diffused again at the static diffusion plate 9042, and the light source subjected to the two-time diffusion reaches the integrating optical rod 9044, and is homogenized in the integrating optical rod 9044. The laser light after being processed by the speckle removing module 90 finally reaches the second reflecting element 60.

Referring to fig. 2 and fig. 10 together, fig. 10 is a schematic circuit board installation diagram of the laser projection system shown in fig. 1. In some embodiments, the first housing 302, the mounting housing 80, the first reflective element 50, the speckle reduction module 90, the second reflective element 60, and the dmd chip module 70 enclose a cavity; the laser projection system 100 further includes a circuit board 95, the circuit board 95 being disposed over the cavity. The circuit board 95 is overhead installed above the cavity through the installing support, so that the space utilization rate is higher, and the overhead design of the circuit board 95 can enable air in the cavity to circulate better, so that the whole laser projection system 100 is compact in structure and good in heat dissipation efficiency.

Referring back to fig. 3, in some embodiments, the mirror array assembly 40 includes a fourth reflecting element 404, the fourth reflecting element 404 is configured to reflect the laser beam emitted by the red laser light source module 10 to the first reflecting element 50, the fourth reflecting element 404 includes a fourth reflecting mirror 4040 and a fourth mounting frame 4042, and the fourth reflecting mirror 4040 is perpendicular to the first reflecting mirror 502; the red laser light source module 10 is closer to the first reflecting element 50 than the green laser light source module 30; the laser beam emitted from the blue laser light source module 20 sequentially passes through the third reflective element 402 and the fourth reflective element 404 and then enters the first reflective element 50, and the angle at which the laser beam emitted from the blue laser light source module 20 enters the first reflective mirror 502 is 45 degrees. The red laser light source module 10 is disposed at a position closest to the first reflective element 50 because of its large divergence angle of the red laser light emitted from the red laser light source module 10, and the red laser light emitted from the red laser light source module 10 is reflected by the fourth reflective element 404 and then directly reaches the first reflective element 50, so that the blue laser light does not need to pass through the third reflective element 402 and the fourth reflective element 404, and the energy loss is reduced. The blue laser light source module 20, the red laser light source module 40 and the green laser light source module 30 form an included angle of 90 degrees, the blue laser light emitted by the blue laser light source module 20 does not need to be reflected by the reflecting element, and the blue laser light directly passes through the third reflecting element 402 and the fourth reflecting element 404 to reach the first reflecting element 50.

In some examples, the fourth mirror 4040 occupies only half of the plane of the fourth reflective element 404, the other half is the second light-transmitting hole 4044, and the blue laser light and the green laser light pass through the second light-transmitting hole 4044, so that the fourth reflective element 404 reflects only the red laser light. The fourth reflecting mirror 4040 may adjust the number according to the area of the red laser emitted by the red laser light source module.

Referring to fig. 11, fig. 11 is a structural perspective view of a digital micromirror chip module of the laser projection system shown in fig. 1. In some embodiments, the digital micro-mirror chip module 70 includes a second housing 702, a heat sink fin 704, a digital micro-mirror chip 706, and a fourth water cooling plate 708, the heat sink fin 704 is disposed on the second housing 702, the digital micro-mirror chip 706 is located within the second housing 702, and the fourth water cooling plate 708 is disposed on the back of the digital micro-mirror chip 706. The projection beam emitted from the fourth reflecting element 404 finally reaches the digital micro-mirror chip module 70, and is received and processed at the digital micro-mirror chip 706 in the digital micro-mirror chip module 70 to be projected to a laser projector, and the emitted three primary colors red, green and blue laser projection beams are synthesized into a finally presented picture through the visual retention effect of human eyes. The digital micro-mirror chip 706 is mounted inside the second housing 702, a plurality of heat dissipation fins 704 are disposed on the surface of the second housing 702, and the heat dissipation fins 704 are disposed on the surface of the second housing 702 in parallel, so that the contact area between the second housing 702 and air is increased, and the heat dissipation effect of the digital micro-mirror chip module 70 is accelerated. The digital micromirror chip module 70 further comprises a fourth water cooling plate 708, which can emit a large amount of heat during the operation of the digital micromirror chip 706, and the fourth water cooling plate 708 is directly mounted on the back of the digital micromirror chip 706, so as to directly and rapidly dissipate the heat released by the fourth water cooling plate 708, and maintain the optimal operating temperature range all the time.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the utility model, the steps may be implemented in any order, and there are many other variations of the different aspects of the utility model as described above, which are not provided in detail for the sake of brevity; while the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. A laser projection system, comprising:

a red laser light source module, a blue laser light source module and a green laser light source module;

the lens array assembly is used for gathering laser beams emitted by the green laser light source module, the blue laser light source module and the red laser light source module to form projection beams;

a first reflecting element including a first reflecting mirror for reflecting the projection beam, the projection beam being incident on the first reflecting mirror at an angle of 45 degrees;

a second reflecting element comprising a second reflecting mirror, the first reflecting mirror being perpendicular to the second reflecting mirror;

the second reflector is used for reflecting the projection light beam reflected by the first reflector to the digital micro-mirror chip module.

2. The laser projection system of claim 1, wherein the mirror array assembly includes a third reflective element for reflecting the laser beam emitted from the green laser light source module to the first reflective element, the third reflective element including a third mirror perpendicular to the first mirror.

3. The laser projection system of claim 2, wherein the green laser light source module comprises a first housing, a first water cooled plate and a green laser, the green laser being located within the first housing, the first water cooled plate being disposed on a back of the green laser.

4. A laser projection system as claimed in claim 3, wherein the green laser light source module comprises a broadband polarization beam splitter prism and surface green laser units, the two surface green laser units are perpendicular to each other, each surface green laser unit comprises a plurality of green lasers, and the broadband polarization beam splitter prism is located between the two surface green laser units and forms an included angle of 45 degrees with each surface green laser unit.

5. The laser projection system of claim 3, further comprising a mounting housing;

the first shell is arranged on the installation shell, the red laser light source module and the blue laser light source module are both arranged on the installation shell, and the third reflecting element is positioned in the installation shell;

the installation shell comprises radiating fins, an installation shell body and an installation shell end cover, wherein the installation shell end cover is detachably installed on the installation shell body, and the radiating fins are arranged on the installation shell body and the installation shell end cover.

6. The laser projection system of claim 5, wherein the red laser light source module comprises a red laser mounted to the mounting housing and a second water cooled plate mounted to a back of the red laser;

the blue laser light source module comprises a blue laser and a third water cooling plate, the red laser is installed on the installation shell, and the third water cooling plate is installed on the back of the blue laser.

7. The laser projection system of claim 5, further comprising a speckle reduction module positioned between the first reflective element and the second reflective element.

8. The laser projection system of claim 7, wherein the first housing, the mounting housing, the first reflective element, the speckle reduction module, the second reflective element, and the digital micromirror chip module define a cavity;

the laser projection system further comprises a circuit board, and the circuit board is arranged above the cavity.

9. The laser projection system of claim 2, wherein the mirror array assembly includes a fourth reflective element for reflecting the laser beam emitted from the red laser light source module to the first reflective element, the fourth reflective element including a fourth mirror perpendicular to the first mirror;

the red laser light source module is closer to the first reflecting element than the green laser light source module;

the laser beam emitted by the blue laser light source module sequentially passes through the third reflecting element and the fourth reflecting element and then enters the first reflecting element, and the angle of the laser beam emitted by the blue laser light source module entering the first reflecting mirror is 45 degrees.

10. The laser projection system of claim 1, wherein the digital micromirror chip module comprises a second housing, a heat sink fin disposed on the second housing, a digital micromirror chip disposed within the second housing, and a fourth water cooled plate disposed on a back of the digital micromirror chip.