CN215679019U - Laser projection device - Google Patents

Abstract

The application discloses laser projection equipment belongs to the projection display field. The laser projection apparatus includes: the circuit board comprises a shell, at least two metal brackets and a circuit board. The at least two metal brackets include a first metal bracket and a second metal bracket. Because the first metal support is provided with the elastic part, the elastic part can be firstly contacted with the second metal support, and then the elastic part can be elastically deformed, so that the elastic part can be attached to the second metal support. Therefore, electrostatic and electromagnetic signals generated by the circuit board can be transmitted to the second metal bracket through the first metal bracket. So, can effectually increase the area of the contact zone between two metal brackets, can increase the effective contact point between two metal brackets, increased effective electromagnetic transmission route, and then can improve the static that the circuit board produced and the effect that electromagnetic signal carries out the transmission through metal bracket, and then effectual reduction is to user's radiation for laser projection equipment's reliability reinforcing.

Description

Laser projection device

Technical Field

The application relates to the field of projection display, in particular to laser projection equipment.

Background

Laser projection devices typically include a housing, and a metal support located in the housing. The metal bracket is used for supporting a circuit board in the laser projection equipment.

Since the number of circuit boards in a laser projection apparatus is usually large, a plurality of metal brackets are required to support the circuit boards. The plurality of metal supports need to be stacked and arranged in the shell, and any two adjacent metal supports need to be fixed through screws. Wherein, a plurality of metal support includes: a floor at the lowermost level, which may serve as a common ground for the laser projection device. The metal bracket is used for supporting the circuit board and is also used as a part of a conductive path of the circuit board, so that each circuit board is finally connected to the bottom plate to realize the grounding of each circuit board. When the circuit board works, electrostatic and electromagnetic signals generated by the circuit board can also be transmitted to the bottom plate through the metal brackets which are connected with each other.

However, since the manufacturing accuracy of the metal brackets is low, when two adjacent metal brackets are fixed by screws, the effective contact area of the contact areas of the two metal brackets is small, and the effective electromagnetic transmission path is small. Therefore, the effect of transmitting the static electricity and the electromagnetic signals generated by the circuit board in the laser projection equipment through the mutually connected metal brackets is poor, and the reliability of the laser projection equipment is poor.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides laser projection equipment. The problem of the relatively poor effect that static and the electromagnetic signal that the circuit board produced among the laser projection equipment of prior art transmitted through interconnect's metal support can be solved, technical scheme is as follows:

there is provided a laser projection device comprising:

a housing having a receiving cavity;

at least two metal brackets are arranged in the accommodating cavity in a stacked mode, and the at least two metal brackets comprise: adjacent first and second metal brackets, the first metal bracket having a resilient portion configured to: after the first metal bracket is connected with the second metal bracket, deforming to be attached to the second metal bracket;

and at least one circuit board located on each of the metal brackets.

The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:

a laser projection device, comprising: the shell, be located the at least two metal support that the shell holding intracavity range upon range of setting and be located at least one circuit board on the metal support. The at least two metal brackets may include a first metal bracket and a second metal bracket. Because the first metal support is provided with the elastic part, the elastic part can be firstly contacted with the second metal support, and then the elastic part can be elastically deformed, so that the elastic part can be attached to the second metal support. Therefore, electrostatic and electromagnetic signals generated from the circuit board on the first metal holder can be transmitted to the second metal holder through the first metal holder. When the second metal support is a base plate, electrostatic and electromagnetic signals generated by the circuit board can be transmitted to the base plate through the first metal support. So, after first metal support and second metal support pass through the contact of elastic component, can effectually increase the area of the contact zone between two metal supports, can increase the effective contact point between two metal supports, increased effective electromagnetic transmission route, and then can improve the effect that static and electromagnetic signal that the circuit board among the laser projection equipment produced transmit through interconnect's metal support, and then effectual reduction is to user's radiation for laser projection equipment's reliability reinforcing.

Drawings

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

Fig. 1 is an exploded schematic view of a partial structure of a laser projection apparatus according to an embodiment of the present disclosure;

FIG. 2 is a partial structural assembly view of the laser projection device shown in FIG. 1;

FIG. 3 is a schematic partial block diagram of the laser projection device shown in FIG. 1;

FIG. 4 is a schematic structural diagram of a first metal bracket according to an embodiment of the present disclosure;

FIG. 5 is a side view of the first metal bracket shown in FIG. 4;

FIG. 6 is an enlarged partial schematic view at A' of FIG. 4;

FIG. 7 is a schematic structural diagram of another first metal bracket provided in an embodiment of the present application;

FIG. 8 is an enlarged partial schematic view at B' of FIG. 7;

FIG. 9 is a schematic partial structure diagram of another laser projection apparatus provided in an embodiment of the present application;

fig. 10 is a schematic partial structural diagram of another laser projection apparatus provided in an embodiment of the present application.

With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

In the related art, in order to solve the problem that when two adjacent metal brackets are fixed by screws, the contact area between the two metal brackets is small, two measures are generally adopted to solve the problem. The first measure is as follows: the contact area when two adjacent metal supports are fixed is increased by controlling the manufacturing accuracy of the metal supports in the laser projection apparatus (e.g., the flatness of the metal supports). However, in the process of controlling the manufacturing accuracy of the metal bracket, the manufacturing difficulty of the metal bracket is increased, and the complexity of the process is increased. The second measure is as follows: and screw locking points on two adjacent metal brackets are increased, and the area of the contact area of the two metal brackets is increased by increasing a plurality of screw locking points. However, taking this measure requires machining a plurality of screw holes for screw locking and a plurality of screws in the manufacturing process of the metal bracket. Thus, the manufacturing cost of the metal bracket may be increased. In addition, the degree of generalization of the metal support frame improved by the two measures is not high.

Referring to fig. 1, fig. 2 and fig. 3, fig. 1 is an exploded schematic view of a partial structure of a laser projection apparatus according to an embodiment of the present disclosure, fig. 2 is an assembly view of a partial structure of the laser projection apparatus shown in fig. 1, and fig. 3 is a schematic view of a partial structure of the laser projection apparatus shown in fig. 1. The laser projection apparatus 000 may include: a housing 100, a metal bracket 200, and a circuit board 300.

The housing 100 may have a receiving cavity 101.

The number of the metal brackets 200 in the laser projection apparatus 000 is at least two, and the at least two metal brackets 200 are stacked and disposed in the accommodating chamber 101 of the housing 100. Wherein, the at least two metal brackets 200 may include: a first metal bracket 201 and a second metal bracket 202 which are adjacently arranged. The first metal bracket 201 may have an elastic part 2011, and the elastic part 2011 may be configured to: after the first metal bracket 201 and the second metal bracket 202 are connected, deformation is performed to achieve attachment with the second metal bracket 202.

In the laser projection apparatus 000, the number of the first metal holders 201 having the elastic portions 2011 may be plural. Illustratively, the number of the first metal holders 201 having the elastic portions 2011 is M, and the number of the metal holders 200 in the laser projection apparatus 000 is N, where N is greater than or equal to M. For example, when N is equal to M, each metal holder 200 in the laser projection apparatus 000 may be the first metal holder 201 having the elastic part 2011. In another possible implementation manner, in order to reduce the manufacturing cost of the metal holder 201, in at least two metal holders 200 stacked in a stack, the metal holder 200 located on the upper layer may have an elastic portion, and the metal holder 200 located on the lower layer may not have an elastic portion, so that the elastic portion 2011 does not need to be provided for each metal holder 200, and the manufacturing cost of the metal holder 201 can be effectively reduced.

The circuit boards 300 may be located on the metal brackets 200, wherein each metal bracket 200 may support at least one circuit board 300, and the circuit board 300 is fixed on the metal bracket 200 by screw locking. In the present application, the circuit board 300 may be a Printed Circuit Board (PCB).

For example, when the first metal bracket 201 and the second metal bracket 202 which are adjacently arranged are connected by a screw locking manner, since the first metal bracket 201 has the elastic part 2011, the elastic part 2011 may contact with the second metal bracket 202 first; then, the elastic portion 2011 is elastically deformed, so that the elastic portion 2011 can be attached to the second metal bracket 202. Therefore, electrostatic and electromagnetic signals generated from the circuit board 300 on the first metal holder 201 can be transmitted to the second metal holder 202 through the elastic portion 2011 on the first metal holder 201. When the second metal holder 202 is a base plate, electrostatic and electromagnetic signals generated by the circuit board 300 can be transmitted to the base plate through the elastic portion 2011 of the first metal holder 201. Thus, after the first metal support 201 and the second metal support 202 are contacted through the elastic part 2011, the area of a contact area between the two metal supports 200 can be effectively increased, that is, effective contact points between the two metal supports 200 can be increased, effective electromagnetic transmission paths are increased, the effect that static electricity and electromagnetic signals generated by the circuit board 300 in the laser projection device 000 are transmitted through the metal supports 200 connected with each other can be improved, the radiation of the electromagnetic signals to users is effectively reduced, and the reliability of the laser projection device 000 is enhanced.

In the embodiment of the present application, only the elastic portion 2011 needs to be processed in the manufacturing process of the metal bracket 200, and the metal bracket 200 does not need to be controlled to have high manufacturing accuracy. Therefore, the manufacturing difficulty of the metal bracket 200 is effectively reduced, and the complexity of the process of the metal bracket 200 is reduced. In addition, after two adjacent metal brackets 200 are attached by the elastic portion 2011, the screw locking point may be replaced by the elastic portion 2011. In this way, only individual screw fastening points need to be provided on the metal holder 200 for fastening the two metal holders 200. The manufacturing cost of the metal bracket 200 is effectively reduced. In addition, the metal holder 200 is provided with the elastic portion 2011 to increase the area of the contact area between two adjacent metal holders 200, so that the universal degree is high, and the metal holder 200 is suitable for metal holders 200 with different structures and different manufacturing accuracies.

In summary, the embodiment of the present application provides a laser projection apparatus, including: the shell, be located the at least two metal support that the shell holding intracavity range upon range of setting and be located at least one circuit board on the metal support. The at least two metal brackets may include a first metal bracket and a second metal bracket. Because the first metal support is provided with the elastic part, the elastic part can be firstly contacted with the second metal support, and then the elastic part can be elastically deformed, so that the elastic part can be attached to the second metal support. Therefore, electrostatic and electromagnetic signals generated from the circuit board on the first metal holder can be transmitted to the second metal holder through the first metal holder. When the second metal support is a base plate, electrostatic and electromagnetic signals generated by the circuit board can be transmitted to the base plate through the first metal support. So, after first metal support and second metal support pass through the contact of elastic component, can effectually increase the area of the contact zone between two metal supports, can increase the effective contact point between two metal supports, increased effective electromagnetic transmission route, and then can improve the effect that static and electromagnetic signal that the circuit board among the laser projection equipment produced transmit through interconnect's metal support, and then effectual reduction is to user's radiation for laser projection equipment's reliability reinforcing.

Optionally, please refer to fig. 4 and fig. 5, where fig. 4 is a schematic structural diagram of a first metal bracket provided in an embodiment of the present application, and fig. 5 is a side view of the first metal bracket shown in fig. 4. The first metal holder 201 in the laser projection apparatus 000 may have a supporting surface 2012, the elastic portion 2011 may be located on the supporting surface 2012 of the first metal holder 201 facing the second metal holder 202 in the laser projection apparatus 000, and the elastic portion 2011 may protrude from the supporting surface 2012. Thus, when the first metal bracket 201 and the second metal bracket 202 are connected, the elastic portion 2011 can be firstly attached to the second metal bracket 202, so as to effectively increase the area of the contact area between the two metal brackets 200, i.e., increase the effective contact point between the two metal brackets 200.

In the embodiment of the present application, there are various alternative implementations of the structure of the elastic portion 2011 on the first metal support 201 in the laser projection apparatus 000, and the embodiment of the present application will be schematically described by taking the following two alternative implementations as examples:

a first alternative implementation, referring to fig. 4, 5 and 6, fig. 6 is a schematic partial enlargement at a' in fig. 4. The elastic portion 2011 may be a metal elastic strip 2011 a. The supporting surface 2012 of the first metal bracket 201 facing the second metal bracket 202 may have an opening 2012a, the metal spring 2011a may be fixedly connected to a sidewall of the opening 2012a of the supporting surface 2012, and a front projection of the metal spring 2011a on the supporting surface 2012 may be located in the opening 2012 a.

Optionally, the first metal support 201 and the metal elastic strip 2011a in the laser projection device 000 may be an integrated structure. So, can adopt stamping die to process this metal shrapnel 2011a in the course of working of first metal support 201, the effectual complexity that reduces first metal support 201 process. In the embodiment of the present application, the first metal holder 201 and the metal elastic strip 2011a in the laser projection apparatus 000 may also be processed separately, that is, the first metal holder 201 is disposed with an opening 2012a on the supporting surface 2012 facing the second metal holder 202, and then the metal elastic strip 2011a is fixed in the opening 2012a on the supporting surface 2012, so that a portion of the metal elastic strip 2011a protrudes from the supporting surface 2012.

For example, when the first metal bracket 201 and the second metal bracket 202 which are adjacently arranged are connected, the metal elastic strip 2011a first contacts with the second metal bracket 202; then, the metal elastic strip 2011a elastically deforms, so that the metal elastic strip 2011a can be attached to the second metal bracket 202; then, the first metal bracket 201 and the second metal bracket 202 are locked and attached by screws to realize the fixed connection of the first metal bracket 201 and the second metal bracket 202, and simultaneously, the metal elastic sheet 2011a is completely positioned in the opening 2012a of the supporting surface 2012 after being elastically deformed. In this manner, the support surfaces 2012 of the first and second metal brackets 201 and 202 can be in contact.

In this embodiment, the metal elastic strip 2011a may be an elastic strip made of iron or made of other metal materials, which is not limited in this embodiment.

Referring to fig. 7 and 8, fig. 7 is a schematic structural diagram of another first metal bracket provided in an embodiment of the present application, and fig. 8 is an enlarged partial schematic view of a portion B' in fig. 7. The elastic portion 2011 of the first metal holder 201 may include: a spring 2011b and a metal support 2011 c. The spring 2011b may be a compression spring. The spring 2011b and the metal supporting plate 2011c may be fixedly connected, and an end of the spring 2011b away from the metal supporting plate 2011c may be connected to the supporting surface 2012 of the first metal bracket 201 facing the second metal bracket 202.

Optionally, a connecting hole 2012b may be formed on the supporting surface 2012 of the first metal bracket 201 facing the second metal bracket 202, and an end of the spring 2011b of the elastic portion 2011, which is away from the metal supporting plate 2011c, may be located in the connecting hole 2012 b.

For example, please refer to fig. 9, and fig. 9 is a partial structural schematic view of another laser projection apparatus provided in the embodiment of the present application. When the first metal bracket 201 and the second metal bracket 202 which are adjacently arranged are connected, the metal support piece 2011c first contacts with the second metal bracket 202; then, the spring 2011b is compressed and deformed under the action of the metal support piece 2011c, and the spring 2011b generates a reaction force to the metal support piece 2011c, so that the metal support piece 2011c can be attached to the second metal bracket 202; then, the first metal bracket 201 and the second metal bracket 202 are locked and attached by screws to realize the fixed connection of the first metal bracket 201 and the second metal bracket 202, and simultaneously the spring 2011b is compressed to drive the metal support plate 2011c to be completely positioned in the connection hole 2012b on the support surface 2012. In this manner, the support surfaces 2012 of the first and second metal brackets 201 and 202 can be in contact.

In the embodiment of the present application, the number of the elastic portions 2011 in the first metal holder 201 of the laser projection apparatus 000 may be multiple, and the multiple elastic portions 2011 may be uniformly distributed on the supporting surface 2012, facing the second metal holder 202, of the first metal holder 201. In this way, when the first metal bracket 201 and the second metal bracket 202 which are adjacently arranged are connected by a screw locking manner, the plurality of elastic parts 2011 on the first metal bracket 201 first contact with the second metal bracket 202; then, the elastic portions 2011 are elastically deformed, so that the elastic portions 2011 can be attached to the second metal holder 202. Therefore, electrostatic and electromagnetic signals generated by the circuit board 300 on the first metal support 201 can be transmitted to the second metal support 202 through the plurality of elastic portions 2011 on the first metal support 201, the area of a contact area between the two metal supports 200 is further effectively increased, that is, effective contact points between the two metal supports 200 can be increased, effective electromagnetic transmission paths are increased, the effect of transmitting the electrostatic and electromagnetic signals generated by the circuit board 300 in the laser projection device 000 through the metal supports 200 connected with each other can be further improved, the radiation of the electromagnetic signals to a user is further effectively reduced, and the reliability of the laser projection device 000 is enhanced. In addition, the screw locking points may be replaced by a plurality of elastic portions 2011. Thus, only individual screw locking points are required to be arranged on the metal support 200 for fixing the two metal supports 200, and the manufacturing cost of the metal support 200 is effectively reduced.

For example, the number of the elastic portions 2011 may be 5, which is not limited in the embodiments of the present application.

Optionally, at least two metal brackets 200 in the laser projection device 000 may include: at least one connecting bracket and a base plate. Wherein, the at least one connecting bracket can be arranged on the bottom plate in a stacking mode. In this case, since the bottom plate may be a bottom plate made of a metal material, for example, a bottom plate made of iron. Thus, the base plate is capable of absorbing electrostatic and electromagnetic signals transmitted to its surface. In the embodiment of the present application, the first metal bracket 201 is a connecting bracket, and the second metal bracket 202 is a bottom plate. Illustratively, when the second metal support 202 is a base plate, the base plate may serve as a common ground for the laser projection device 000. The metal bracket 200 supports the circuit boards 300 and also serves as a part of the conductive paths of the circuit boards 300, so that each circuit board 300 is finally connected to the bottom plate to realize the grounding of each circuit board 300. Electrostatic and electromagnetic signals generated from the circuit board 300 may also be transmitted to the chassis through the metal brackets 200 connected to each other when the circuit board 300 is operated.

In the embodiment of the present application, please refer to fig. 10, and fig. 10 is a schematic partial structure diagram of another laser projection apparatus provided in the embodiment of the present application. The plurality of circuit boards 300 in the laser projection device 000 may include: a first circuit board 301 and a second circuit board 302. The first circuit board 301 may be a first motherboard, and the second circuit board 302 may be a second motherboard. It should be noted that the laser projection apparatus may further include: a display circuit board, a calibration circuit board, and a transfer circuit board (not shown), which may be disposed on the metal bracket.

In the embodiment of the present application, the housing 100 in the laser projection apparatus 000 may include: an upper case 100a and a lower case 100b are oppositely disposed. A receiving chamber 101 is formed between the upper case 100a and the lower case 100b, and the metal holder 200, the circuit board 300, and the like in the laser projection apparatus 000 are located in the receiving chamber 101. The laser projection apparatus 000 further includes an optical machine, a circuit part, a heat dissipation part, and a sound box part located in the receiving cavity 101 of the housing 100.

The optical machine can comprise a laser light source, an optical machine and a lens. The light source can be a monochromatic laser light source, a bicolor laser light source or a tricolor laser light source and is used for providing laser illumination light beams. The laser beam provided by the light source is incident to the illumination light path part in the optical machine after light combination and shaping. The rear end of the illumination light path part is a digital micro-mirror device (DMD) array, and in a DLP (digital light processing) projection framework, a DMD chip is a core light modulation device. The DMD chip receives a driving control signal corresponding to an image signal, and turns over thousands of tiny mirrors on the surface of the DMD chip at a positive angle or a negative angle corresponding to the driving signal, so that light beams irradiating the surface of the DMD chip are reflected into a lens. The lens is used for projecting the image light beam to the projection screen, so that the display of the projection image is realized.

The heat dissipation portion may include a plurality of fans and a plurality of water pumps for dissipating heat from the respective components in the laser projection apparatus 000. The speaker part may include a speaker for realizing the playing of sound.

In the embodiment of the application, the first main board and the second main board are mainly used for decoding external audio and video signals. The second motherboard may be provided with a system on chip (SoC) 61, which can decode data in different data formats into a normalized format. And transmits the data in the normalized format to a first motherboard, which transmits the data in the normalized format to the display circuit board, through, for example, a connector (connector). For example, the data in the normalized format may be a video image signal.

The display circuit board may be provided with an algorithm processing module Field Programmable Gate Array (FPGA) and a main control chip. The algorithm processing module FPGA is configured to process a video image signal input by the first motherboard, for example, perform Motion Estimation and Motion Compensation (MEMC) frequency multiplication processing, or perform image enhancement function such as image correction. The main control chip is connected with the algorithm processing module FPGA and used for receiving the processed video image processing signal data as image data to be displayed. It should be noted that the algorithm processing module FPGA generally exists as an enhanced function module, and in some low-cost schemes, the module part may not be provided, and the main control chip is connected to the first main board and receives the video image display signal output by the first main board.

The switching circuit board is used for carrying out format conversion on the signals transmitted by the first main board and transmitting the converted images to the correction circuit board. The correction circuit board is used for correcting the projection position of the image. The laser projection device 000 provided in the embodiment of the present application may further include a power board (not shown in the figure), and the power board may be used to supply power to each device or each partial module on the optical machine, the heat dissipation portion, the sound box portion, the display circuit board, the correction circuit board, the adapter circuit board, the first motherboard, and the second motherboard, so as to ensure that each part of the laser projection device 000 supplies power normally.

Illustratively, the laser projection device 000 may be a laser projection television.

In summary, the embodiment of the present application provides a laser projection apparatus, including: the shell, be located the at least two metal support that the shell holding intracavity range upon range of setting and be located at least one circuit board on the metal support. The at least two metal brackets may include a first metal bracket and a second metal bracket. Because the first metal support is provided with the elastic part, the elastic part can be firstly contacted with the second metal support, and then the elastic part can be elastically deformed, so that the elastic part can be attached to the second metal support. Therefore, electrostatic and electromagnetic signals generated from the circuit board on the first metal holder can be transmitted to the second metal holder through the first metal holder. When the second metal support is a base plate, electrostatic and electromagnetic signals generated by the circuit board can be transmitted to the base plate through the first metal support. So, after first metal support and second metal support pass through the contact of elastic component, can effectually increase the area of the contact zone between two metal supports, can increase the effective contact point between two metal supports, increased effective electromagnetic transmission route, and then can improve the effect that static and electromagnetic signal that the circuit board among the laser projection equipment produced transmit through interconnect's metal support, and then effectual reduction is to user's radiation for laser projection equipment's reliability reinforcing.

In this application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.

The above description is intended to be exemplary only, and not to limit the present application, and any modifications, equivalents, improvements, etc. made within the spirit and scope of the present application are intended to be included therein.

Claims (10)

1. A laser projection device, comprising:

a housing having a receiving cavity;

at least two metal brackets are arranged in the accommodating cavity in a stacked mode, and the at least two metal brackets comprise: adjacent first and second metal brackets, the first metal bracket having a resilient portion configured to: after the first metal bracket is connected with the second metal bracket, deforming to be attached to the second metal bracket;

and at least one circuit board located on each of the metal brackets.

2. The laser projection device of claim 1, wherein the elastic portion is located on a supporting surface of the first metal support facing the second metal support, and the elastic portion protrudes from the supporting surface.

3. The laser projection device of claim 2, wherein the elastic portion is a metal dome.

4. The laser projection device of claim 3, wherein the supporting surface has an opening, the metal spring is fixedly connected to a sidewall of the opening, and an orthographic projection of the metal spring on the supporting surface is located in the opening.

5. The laser projection device of claim 3, wherein the first metal bracket and the metal dome are of an integral structure.

6. The laser projection apparatus of claim 2, wherein the elastic portion comprises: the spring and with the metal backing sheet of spring fixed connection, the spring keep away from the one end of metal backing sheet with the holding surface is connected.

7. The laser projection device of claim 6, wherein the support surface has a connection hole, and an end of the spring away from the metal support plate is located in the connection hole.

8. The laser projection device as claimed in any one of claims 2 to 7, wherein the number of the elastic parts in the first metal support is plural, and the plural elastic parts are uniformly distributed on the supporting surface.

9. The laser projection device of any of claims 1 to 7, wherein the at least two metal brackets comprise: the connecting device comprises at least one connecting support and a bottom plate, wherein the at least one connecting support is arranged on the bottom plate in a stacked mode.

10. The laser projection device of any of claims 1 to 7, wherein the plurality of circuit boards comprises: display circuit board, correction circuit board, switching circuit board, first mainboard and second mainboard.

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