Laser projection equipment

Abstract

The embodiment of the utility model belongs to the laser projection technology, and provides laser projection equipment, which comprises a shell provided with a heat dissipation opening; the optical engine is located in the outer shell, and the optical engine comprises a main shell body; the power supply board is connected with the main shell; the laser is electrically connected with the power supply board and is connected with the main shell; the radiator abuts against the side, away from the main shell, of the laser and is connected with the main shell. And the noise reduction unit abuts against at least one of the radiator, the main shell and the power supply board. The air conditioner is low in noise.

Description

Technical Field

[0001] The embodiments of the present application relate to laser projection technology, and more particularly to a laser projection device. Background Art

[0002] Laser projection display, also known as laser projection or laser display, is a display technology that uses red, green and blue primary color lasers as light sources. It can truly reproduce the rich and bright colors of the objective world and provide more shocking expressiveness.

[0003] In the related art, the laser projection device includes a housing and an optical engine. The optical engine includes a main shell, a laser, a power supply board and a heat sink. The pins of the laser are welded to the power supply board. The laser and the power supply board are arranged in the main shell, and the heat sink is abutted against the laser.

[0004] However, when laser projection equipment is running, the laser tends to generate high-frequency noise, which reduces the user experience. Utility Model Content

[0005] The embodiment of the present application provides a laser projection device with low noise.

[0006] In a first aspect, an embodiment of the present application provides a laser projection device, comprising:

[0007] A housing, the housing being configured with heat dissipation vents;

[0008] The optical engine is located in the housing and includes:

[0009] main housing;

[0010] A power supply board connected to the main housing;

[0011] A laser, the laser is electrically connected to the power supply board and connected to the main housing;

[0012] A heat sink abuts against a side of the laser away from the main housing and is connected to the main housing;

[0013] The noise reduction unit is in contact with at least one of the heat sink, the main housing or the power supply board.

[0014] In this way, the noise reduction unit changes the path of the sound generated by the laser to the heat dissipation port, and the high-frequency noise emitted by the laser can be weakened by blocking the noise reduction unit, thereby reducing the noise.

[0015] In some embodiments of the present application, the noise reduction unit abuts against at least one of the heat sink, the main housing, or the power supply board, and is opposite to the heat dissipation port.

[0016] This is helpful to improve the noise reduction effect.

[0017] In some embodiments of the present application, the noise reduction unit includes at least one flexible deformable member, and the flexible deformable member matches the shape of and is bonded to at least one of the heat sink, the main housing, or the power supply board.

[0018] In this way, the cost of the noise reduction unit is low and the installation efficiency is high.

[0019] In some embodiments of the present application, the power supply board is configured with an avoidance area, the heat sink is inserted in the avoidance area, and the side wall of the avoidance area is provided with a connection portion electrically connected to the heat sink;

[0020] The noise reduction unit includes a first noise reduction member, and the first noise reduction member abuts against the main housing;

[0021] The side wall of the avoidance area abuts against a side of the first noise reduction component facing away from the main shell body, and the laser is located in the area surrounded by the first noise reduction component.

[0022] In this way, the first noise reduction member surrounds the circumference of the laser, thereby facilitating noise reduction.

[0023] In some embodiments of the present application, the noise reduction unit further includes a second noise reduction component, the second noise reduction component abuts against a side of the power supply board facing away from the first noise reduction component, and the laser is located in the area surrounded by the second noise reduction component.

[0024] In this way, the first noise reduction component and the second noise reduction component cooperate to reduce noise, and the noise reduction effect is better.

[0025] In some embodiments of the present application, the main housing includes a main body and an enclosure structure connected to the main body, and the enclosure structure and the main body form a receiving cavity;

[0026] The first noise reduction component, the second noise reduction component, the power supply board and the laser are located in the accommodating cavity;

[0027] The side of the heat sink facing the laser abuts against the side of the enclosure structure facing away from the main body to close the opening of the accommodating cavity facing the heat sink.

[0028] In this way, a closed cavity is formed between the main body, the enclosure structure and the radiator, so that the laser can be separated from the outside world, further absorbing and isolating the noise.

[0029] In some embodiments of the present application, a side of the second noise reduction component facing away from the power supply board protrudes from the enclosure structure, the radiator abuts against the enclosure structure, and the radiator abuts against a side of the second noise reduction component facing away from the power supply board.

[0030] In this way, after the radiator is connected to the main shell, the second noise reduction component is in a compressed state, which is conducive to close fitting and noise reduction.

[0031] In some embodiments of the present application, a first sealing member is also included;

[0032] A sealing cavity is provided on at least one of a side of the radiator facing the enclosure structure and a side of the enclosure structure facing the radiator, and a first sealing member is provided in the sealing cavity.

[0033] This helps to improve the sealing between the radiator and the enclosure structure and enhance the noise reduction effect.

[0034] In some embodiments of the present application, the sealed cavity is arranged on a side of the enclosure structure facing the radiator.

[0035] In this way, the cost is lower.

[0036] In some embodiments of the present application, a second seal is further included. The second seal is sleeved on the laser. The laser and the second seal are configured to seal the opening of the accommodating cavity on a side away from the heat sink.

[0037] In this way, dust can be effectively prevented from entering. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0039] Figure 1 A schematic diagram of a first structure of an optical engine in a laser projection device provided in an embodiment of the present application;

[0040] Figure 2 for Figure 1 A schematic diagram of the structure of the middle main shell;

[0041] Figure 3 A second structural schematic diagram of an optical engine in a laser projection device provided in an embodiment of the present application;

[0042] Figure 4 for Figure 3 A top view of

[0043] Figure 5 for Figure 4 Sectional view along AA direction;

[0044] Figure 6 for Figure 5 A partial enlarged view of point B in the middle;

[0045] Figure 7 for Figure 3 A schematic diagram of the structure of the middle main shell;

[0046] Figure 8 A schematic diagram of the structure of a second sealing member in a laser projection device provided in an embodiment of the present application;

[0047] Fig. 9 A schematic diagram of the structure of a laser and a second sealing member in a laser projection device provided in an embodiment of the present application;

[0048] Fig.10 A schematic diagram of the structure of a power supply board in a laser projection device provided in an embodiment of the present application;

[0049] Fig.11 A schematic diagram of the structure of a laser, a second sealing member and a power supply board in a laser projection device provided in an embodiment of the present application;

[0050] Fig.12 A schematic diagram of the structure of a main housing and a first noise reduction component in a laser projection device provided in an embodiment of the present application;

[0051] Fig.13 A schematic diagram of the structure of a first noise reduction component in a laser projection device provided in an embodiment of the present application;

[0052] Fig.14 A schematic diagram of the structure of a main housing, a first noise reduction component, a laser, a sealing component and a power supply board in a laser projection device provided in an embodiment of the present application;

[0053] Fig.15 A schematic diagram of the structure of a second noise reduction component in a laser projection device provided in an embodiment of the present application;

[0054] Fig.16 for Figure 3 Schematic diagram of the structure of the optical engine after removing the heat sink;

[0055] Fig.17 A schematic diagram of the structure of a first sealing member in a laser projection device provided in an embodiment of the present application;

[0056] Fig.18 A schematic diagram of the structure of a radiator in a laser projection device provided in an embodiment of the present application.

[0057] Reference numerals:

[0058] 100-main shell;

[0059] 110- positioning structure;

[0060] 120-first connection structure;

[0061] 130-main body;

[0062] 140- enclosure structure;

[0063] 200-power supply board;

[0064] 210-power socket;

[0065] 220 - avoidance zone;

[0066] 230-connection part;

[0067] 300-Laser;

[0068] 400-Radiator;

[0069] 410-Substrate;

[0070] 420-heat pipe;

[0071] 430-first fin group;

[0072] 440- second fin group;

[0073] 500-Noise reduction unit;

[0074] 510- first noise reduction member;

[0075] 520-second noise reduction component;

[0076] 530 - first seal;

[0077] 600 - Second seal. DETAILED DESCRIPTION

[0078] In the related art, due to the processing technology of the laser, such as the packaging process, the laser will generate high-frequency noise when it is running. Laser projection equipment using such lasers will emit high-frequency noise. When the laser projection equipment is used, it is close to the human ear, and the presence of high-frequency noise will reduce the user experience and even affect the viewing experience.

[0079] In order to solve the above technical problems, the laser projection device of the present application is provided with a noise reduction unit, which uses the noise reduction unit to change the path of the sound generated by the laser to be transmitted to the heat dissipation port of the shell, thereby achieving the purpose of noise reduction.

[0080] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0081] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0082] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such products or devices.

[0083] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0084] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0085] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0086] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0087] The laser projection device provided in the embodiment of the present application includes: a housing having a heat dissipation port.

[0088] The outer shell can protect the internal components, and the heat dissipation vents are used for air flow, thereby achieving heat dissipation of the laser projection equipment.

[0089] The heat dissipation openings may be arranged on the bottom wall, side wall or top wall of the housing. The present embodiment does not specifically limit the position, shape and number of the heat dissipation openings.

[0090] In some embodiments, the laser projection device includes: an optical engine. The optical engine is located in a housing.

[0091] See also Figures 1 to 7 As shown, in some embodiments, the optical engine includes: a main housing 100. The main housing 100 can be used to fix other devices.

[0092] In some embodiments, the optical engine includes a power supply board 200 . The power supply board 200 is connected to the main housing 100 .

[0093] In some embodiments, the optical engine includes a laser 300. The laser 300 is electrically connected to the power supply board 200 and is connected to the main housing 100.

[0094] In some embodiments, the optical engine includes a heat sink 400 . The heat sink 400 abuts against a side of the laser 300 facing away from the main housing 100 , and is connected to the main housing 100 .

[0095] In some embodiments, the optical engine includes a noise reduction unit 500 .

[0096] In some embodiments, the noise reduction unit 500 abuts against at least one of the heat sink 400, the main housing 100, or the power supply board 200. The noise reduction unit 500 is configured to change the path of the sound generated by the laser 300 to the heat dissipation port. In this way, the high-frequency noise emitted by the laser 300 can be attenuated by the noise reduction unit 500, thereby reducing the noise.

[0097] See also Figure 2 and Figure 7 As shown, in some embodiments, in order to facilitate installation, a positioning structure 110 is provided on the main housing 100 to facilitate installation and positioning of the laser 300 and the power supply board 200 .

[0098] In some embodiments, the positioning structure 110 may be a positioning protrusion, and the power supply board 200 is provided with a positioning hole matching the positioning protrusion.

[0099] During installation, the laser 300 and the power supply board 200 may be connected together first, the positioning structure 110 may be inserted into the positioning hole, and the laser 300 and the power supply board 200 may be integrally mounted on the main housing 100 .

[0100] In some embodiments, the positioning structure 110 may be a positioning hole, and the power supply board 200 is provided with a positioning protrusion matching the positioning hole.

[0101] In some embodiments, a first connection structure 120 is disposed on the main housing 100 , and a fastener is inserted into the first connection structure 120 via the laser 300 and the power supply board 200 .

[0102] For example, the fastener may be a screw. The first connection structure 120 may be a connection column, and a threaded hole is provided on the connection column.

[0103] See also Figure 5 , Figure 6 and Figure 8 and Fig. 9 As shown, in some embodiments of the present application, a second seal 600 is further included. The second seal 600 is sleeved on the laser 300 . The laser 300 and the second seal 600 are configured to seal the gap between the laser 300 and the main housing 100 .

[0104] See also Fig.10 As shown, in some embodiments, a power supply socket 210 is provided on the power supply board 200 , and the power supply socket 210 is connected to an external driver to provide a power supply signal for the laser 300 .

[0105] In some embodiments of the present application, the noise reduction unit 500 is in contact with at least one of the heat sink 400, the main housing 100 or the power supply board 200 and is opposite to the heat dissipation port, which is conducive to improving the noise reduction effect.

[0106] In some embodiments, the noise reduction unit 500 is in contact with at least one of the heat sink 400 , the main housing 100 , or the power supply board 200 , and is close to the heat dissipation port.

[0107] In some embodiments of the present application, the noise reduction unit 500 includes at least one flexible deformable member (not shown in the figure), and the flexible deformable member matches the shape of and is bonded to at least one of the heat sink 400, the main housing 100, or the power supply board 200. In this way, the noise reduction unit 500 has a low cost and is more convenient to install.

[0108] In some embodiments, the flexible deformable member is opposite to the heat dissipation opening. Alternatively, the flexible deformable member is close to the heat dissipation opening.

[0109] It is understandable that in order to effectively avoid affecting the heat dissipation of the laser 300 , the flexible deformable member does not need to abut against the laser 300 .

[0110] In some embodiments, the flexible deformable member may wrap around at least a portion of the outer wall of both the main housing 100 and the heat sink 400 in a shape.

[0111] In some embodiments, the flexible deformable member can wrap around at least a portion of the outer wall of the main housing 100 , the power board 200 , and the heat sink 400 in a shape.

[0112] In some embodiments, the flexible deformable member may be foam, sponge, rubber, etc., wherein the number of the flexible deformable members may be one, two, or more.

[0113] In some embodiments, the flexible deformable member may be provided with an adhesive layer. During installation, the protective layer is removed to expose the adhesive layer, and then the flexible deformable member is bonded using the adhesive layer.

[0114] In other embodiments, during installation, an adhesive layer may be coated on the flexible deformable member, and then the flexible deformable member may be bonded using the adhesive layer.

[0115] See also Fig. 9 As shown, in some embodiments of the present application, the power supply board 200 is configured with an avoidance area 220, the heat sink 400 is inserted in the avoidance area 220, and the side wall of the avoidance area 220 is provided with a connection portion 230 electrically connected to the heat sink 400. In other words, the power supply board 200 surrounds the laser 300.

[0116] See also Fig.10 and Fig.11 As shown, in some embodiments, the laser 300 and the connection portion 230 of the power supply board 200 are welded together through pins to achieve power supply of each pin.

[0117] See also Fig.12 , Fig.13 and Fig.14 As shown, in some embodiments, the noise reduction unit 500 includes a first noise reduction member 510, and the first noise reduction member 510 abuts against the main housing 100. The side wall of the avoidance area 220 abuts against the side of the first noise reduction member 510 that is away from the main housing 100, and the laser 300 is located in the area surrounded by the first noise reduction member 510. In this way, the first noise reduction member 510 surrounds the peripheral side of the laser 300, which is conducive to noise reduction.

[0118] In some embodiments, the first noise reduction member 510 may be in the shape of a flat plate.

[0119] In some embodiments, the first noise reduction component 510 may be integrally arranged around the circumference of the laser 300 , or the first noise reduction component 510 may be provided with a notch around the circumference of the laser 300 .

[0120] In some embodiments, the material of the first noise reduction member 510 can be a compressed elastic or soft material, such as foam, rubber, silicone, etc. In order to fit tightly, after the laser 300, the power supply board 200 and the main housing 100 are connected, the first noise reduction member 510 is in a compressed state.

[0121] In some embodiments, the shape of the first noise reduction member 510 may match the shape of the power supply board 200 , that is, the shape of the first noise reduction member 510 may be the same as or similar to the shape of the power supply board 200 .

[0122] In some embodiments, the shape of the first noise reduction member 510 may match the shape of the main housing 100. That is, the shape of the first noise reduction member 510 may be set according to the installable space provided by the main housing 100.

[0123] In some embodiments, in order to facilitate the installation and positioning of the first noise reduction component 510, the first noise reduction component 510 is provided with a positioning hole matching the positioning structure 110. When the first noise reduction component 510 is installed, the positioning structure 110 is inserted into the positioning hole, thereby facilitating the installation and positioning of the first noise reduction component 510.

[0124] See also Fig.15 and Fig.16 As shown, in some embodiments of the present application, in order to improve the noise reduction effect, the noise reduction unit 500 also includes a second noise reduction component 520, which abuts against the side of the power supply board 200 away from the first noise reduction component 510, and the laser 300 is located in the area enclosed by the second noise reduction component 520.

[0125] It can be understood that the first noise reduction component 510 is in surface contact with the main shell 100 and in surface contact with the power supply board 200, and the second noise reduction component 520 is in surface contact with the power supply board 200. The first noise reduction component 510 and the second noise reduction component 520 cooperate to form a complete noise reduction seal between the power supply board 200 and the main shell 100.

[0126] In some embodiments, the material of the second noise reduction component 520 can be a compressible elastic or soft material, such as foam, rubber, silicone, etc.

[0127] In some embodiments, in order to achieve a close fit, after the heat sink 400 is connected to the main housing 100 , the second noise reduction member 520 is in a compressed state.

[0128] In some embodiments, the shape of the second noise reducer 520 may match the shape of the first noise reducer 510 , that is, the shape of the second noise reducer 520 may be the same as or similar to the shape of the first noise reducer 510 .

[0129] In some embodiments, the main housing 100 is provided with a second connection structure, and the heat sink 400 is connected to the second connection structure of the main housing 100 by a fastener, and the fastener is inserted into the second connection structure of the main housing 100 through the heat sink 400. Exemplarily, the connection member may be a screw.

[0130] In some embodiments of the present application, in order to further improve the noise reduction effect, the main shell 100 includes a main body 130 and an enclosure structure 140 connected to the main body 130 , and the enclosure structure 140 and the main body 130 form a receiving cavity.

[0131] The first noise reduction component 510, the second noise reduction component 520, the power supply board 200 and the laser 300 are located in the accommodation cavity.

[0132] See also Figure 6 , Figure 7 and Fig.17 As shown, the side of the heat sink 400 facing the laser 300 abuts against the side of the enclosure structure 140 facing away from the main body 130 to close the opening of the accommodating cavity facing the heat sink 400 .

[0133] In this way, a closed cavity is formed between the main body 130, the enclosure structure 140 and the heat sink 400, so that the laser 300 can be separated from the outside world, and the noise is further absorbed and isolated.

[0134] In some embodiments, in order to improve the strength of the connection, the main body 130 and the enclosure structure 140 are integrally provided.

[0135] In some embodiments, the body 130 and the enclosure are metal parts.

[0136] In some embodiments, in order to improve the heat dissipation effect, a heat conducting layer is provided between the heat sink 400 and the laser 300. Exemplarily, the heat conducting layer may be a thermally conductive silicone grease layer.

[0137] In some embodiments of the present application, the side of the second noise reduction member 520 facing away from the power board 200 protrudes from the enclosure structure 140, the heat sink 400 abuts against the enclosure structure 140, and the heat sink 400 abuts against the side of the second noise reduction member 520 facing away from the power board 200. In other words, in order to fit tightly, after the heat sink 400 is connected to the main housing 100, the second noise reduction member 520 is in a compressed state.

[0138] See also Fig.16 and Fig.17 As shown, in some embodiments of the present application, a first seal 530 is further included to improve the sealing between the radiator 400 and the enclosure structure 140 .

[0139] See also Figure 7 and Fig.16 As shown, in some embodiments, at least one of a side of the radiator 400 facing the enclosure structure 140 and a side of the enclosure structure 140 facing the radiator 400 is provided with a sealed cavity, and the first sealing member 530 is provided in the sealed cavity.

[0140] In some embodiments, the size of the first sealing member 530 is larger than the size of the sealing cavity, that is, after the heat sink 400 is installed, the first sealing member 530 is in a compressed state.

[0141] In some embodiments, the material of the first sealing member 530 can be a compressible elastic or soft material, such as foam, rubber, silicone, etc.

[0142] In some embodiments of the present application, in order to save costs, the sealed cavity is set on the side of the enclosure structure 140 facing the radiator 400. It can be understood that compared with setting the sealed cavity on the radiator 400, setting the sealed cavity on the enclosure structure 140 in the present application is lower in cost and easier to process.

[0143] See also Fig.18 As shown, in some embodiments, the heat sink 400 includes a substrate 410, a heat pipe 420 and a first fin group 430 connected in sequence. The substrate 410 is in contact with the laser 300.

[0144] In some embodiments, the heat sink 400 further includes a second fin set 440 , which abuts against a side of the substrate 410 facing away from the laser 300 .

[0145] In some embodiments of the present application, a second seal 600 is further included. The second seal 600 is sleeved on the laser 300 . The laser 300 and the second seal 600 are configured to seal the opening of the accommodating cavity away from the heat sink 400 .

[0146] It is understandable that the second sealing member 600 is sleeved on the laser 300, and the installation and positioning can be achieved by utilizing the shape of the laser 300. The second sealing member 600 is used to seal the gap between the laser 300 and the main housing 100, thereby effectively preventing dust from entering.

[0147] Exemplarily, the material of the second sealing member 600 may be rubber.

[0148] The following is an introduction to the installation process of the laser projection equipment.

[0149] See also Fig. 9 As shown, the second sealing member 600 is sleeved on the laser 300 .

[0150] See also Fig.11 As shown, the pins of the laser 300 are welded to the power supply board 200 .

[0151] See also Fig.12 As shown, the first noise reduction member 510 is installed on the main housing 100 .

[0152] Specifically, the first noise reduction member 510 may be bonded or placed on the main housing 100 .

[0153] See also Fig.14 As shown, the laser 300 and the power supply board 200 are mounted on the main housing 100 .

[0154] Specifically, the power supply board 200 abuts against the first noise reduction member 510 , and the laser 300 and the power supply board 200 are fixed to the main housing 100 by fasteners.

[0155] See also Fig.16 As shown, the second noise reduction member 520 is installed on the main housing 100 .

[0156] Specifically, the second noise reduction member 520 abuts against the power supply board 200 .

[0157] The heat sink 400 is mounted on the main housing 100 .

[0158] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0159] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A laser projection device, characterized in that: include: A housing, wherein the housing is provided with a heat dissipation opening; An optical engine, the optical engine being located in the housing, and the optical engine comprising: main housing; A power supply board, the power supply board is connected to the main housing; a laser, the laser being electrically connected to the power supply board and connected to the main housing; A heat sink, the heat sink abuts against a side of the laser away from the main housing and is connected to the main housing; A noise reduction unit is abutted against at least one of the heat sink, the main housing, or the power supply board.

2. The laser projection device according to claim 1, characterized in that: The noise reduction unit abuts against at least one of the heat sink, the main housing, or the power supply board, and faces the heat dissipation port.

3. The laser projection device according to claim 1 or 2, characterized in that: The noise reduction unit includes at least one flexible deformable member, and the flexible deformable member matches the shape of and is bonded to at least one of the heat sink, the main housing, or the power supply board.

4. The laser projection device according to claim 1 or 2, characterized in that: The power supply board is configured with a relief area, the heat sink is inserted in the relief area, and a side wall of the relief area is provided with a connection portion electrically connected to the heat sink; The noise reduction unit includes a first noise reduction member, and the first noise reduction member abuts against the main housing; The side wall of the avoidance area abuts against a side of the first noise reduction component facing away from the main shell, and the laser is located in the area surrounded by the first noise reduction component.

5. The laser projection device according to claim 4, characterized in that: The noise reduction unit further includes a second noise reduction component, the second noise reduction component is in contact with a side of the power supply board facing away from the first noise reduction component, and the laser is located in an area surrounded by the second noise reduction component.

6. The laser projection device according to claim 5, characterized in that: The main housing comprises a main body and an enclosure structure connected to the main body, wherein the enclosure structure and the main body form a receiving cavity; The first noise reduction component, the second noise reduction component, the power supply board and the laser are located in the accommodating cavity; The side of the heat sink facing the laser abuts against the side of the enclosure structure facing away from the main body to close the opening of the accommodating cavity facing the heat sink.

7. The laser projection device according to claim 6, characterized in that: The side of the second noise reduction component facing away from the power supply board protrudes from the enclosure structure, the radiator abuts against the enclosure structure, and the radiator abuts against the side of the second noise reduction component facing away from the power supply board.

8. The laser projection device according to claim 6, characterized in that: Also included is a first seal; A sealing cavity is provided on at least one of a side of the radiator facing the enclosure structure and a side of the enclosure structure facing the radiator, and the first sealing member is provided in the sealing cavity.

9. The laser projection device according to claim 8, characterized in that: The sealed cavity is arranged on a side of the enclosure structure facing the radiator.

10. The laser projection device according to claim 6, characterized in that: It also includes a second sealing member, which is sleeved on the laser. The laser and the second sealing member are configured to seal an opening of the accommodating cavity on a side away from the heat sink.

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