Laser projection equipment

Abstract

The embodiment of the invention belongs to the laser technology, and provides laser projection equipment which comprises a light source, a light machine, a lens and a shell. The shell is an integrated piece, the shell is provided with at least two openings for light conduction, the light machine and the lens are both located in the shell, the light machine is close to the other opening relative to one opening, the lens is close to one opening relative to the other opening, and the light source faces the opening close to the light machine; the sealing assembly at least covers the opening close to the lens; the housing and the sealing assembly are jointly configured to load and seal the ray machine and the lens so as to complete the assembly of the ray machine and the lens. The light machine and the lens are both installed on the shell, the assembly tolerance is small, the position accuracy between the light machine and the lens can be improved, and the optical performance of the laser projection equipment can be improved; a worker can assemble and disassemble the ray machine and the lens through the opening, thereby facilitating replacement or maintenance of the ray machine and the lens; the lens is installed in the shell, an external structure is not needed, and miniaturization of the laser projection equipment is facilitated.

Description

Technical Field

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

[0002] With the continuous development of science and technology, laser projection equipment is increasingly being used in people's work and life. Currently, laser projection equipment mainly consists of a light source system, an optical mechanical system, and a lens. The light source system is used to provide a light beam to the optical mechanical system, which is used to receive the light beam provided by the light source system and modulate the received light beam to obtain a modulated light beam. The modulated light beam is then emitted to the lens, which is used to receive the modulated light beam from the optical mechanical lighting system and project the modulated light beam to obtain the projection image.

[0003] In the related art, optical components of an optomechanical system and a lens are usually assembled in a telescopic manner.

[0004] However, the replacement of optical components in the above method is difficult, the number of optical components is large, the assembly tolerance is large, and the structural stability of the laser projection equipment is poor. Summary of the Invention

[0005] The embodiment of the present application provides a laser projection device that can solve the technical problems in the related art that it is difficult to replace optical components, there are a large number of optical components, the assembly tolerance is large, and the structural stability of the laser projection device is poor.

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

[0007] a light source for providing a light beam;

[0008] an optical engine, located at the light-emitting side of the light source, for receiving the light beam;

[0009] A lens, located on the light-emitting side of the optical machine, for receiving the light beam and projecting it onto an imaging surface;

[0010] a housing, the housing being a single piece and having at least two openings for light conduction; the optical engine and the lens being both located within the housing; the optical engine being positioned relative to one of the openings and closer to the other opening; the lens being positioned relative to the other opening and closer to one of the openings; and the light source being oriented toward the opening closer to the optical engine;

[0011] a sealing assembly, at least covering the opening near the lens;

[0012] The housing and the sealing assembly are jointly configured to load the optical engine and the lens and seal them, so as to complete the assembly of the optical engine and the lens.

[0013] The laser projection device of the embodiment of the present application can install and fix the optical engine and lens by providing an integrated shell to ensure the stability of the laser projection device; the optical engine and lens are both installed on the shell, and the assembly tolerance between the optical engine and the lens is small, which can improve the positional accuracy between the optical engine and the lens and improve the optical performance of the laser projection device; by forming an opening on the shell, the staff can load and unload the optical engine and lens through the opening, which is convenient for replacing or maintaining the optical engine and lens; by installing the lens inside the shell, no external structure is required, which is conducive to miniaturization of the laser projection device.

[0014] In some embodiments of the present application, the opening toward which the light source faces is a light inlet, and the opening closer to the lens relative to the light inlet is a light outlet.

[0015] The opening located between the light inlet and the light outlet along the transmission path of the light beam is a mounting port, and the mounting port is used for loading and unloading at least one of the optical engine and the lens to complete the assembly of the optical engine and the lens;

[0016] The sealing component is at least covered on the light outlet and the installation port.

[0017] With this arrangement, the mounting port can facilitate the loading and unloading of the optical machine and lens, reducing the complexity and difficulty of assembly and improving assembly efficiency; in addition, the setting of the mounting port allows the optical machine and lens to be loaded and unloaded separately, thereby improving the flexibility and convenience of replacing or maintaining the laser projection equipment and reducing maintenance costs.

[0018] In some embodiments of the present application, the sealing assembly includes a first sealing member and a second sealing member, wherein the first sealing member is provided to cover the light outlet, and the second sealing member is provided to cover the mounting port;

[0019] The mounting port is closer to the light inlet than the light outlet, and is used for loading and unloading the optical machine to complete the assembly of the optical machine and the lens;

[0020] Alternatively, the mounting port is closer to the light outlet relative to the light inlet, and the mounting port is used for mounting and removing the lens to cooperate with each other to complete the assembly of the optical machine and the lens.

[0021] With this arrangement, the first seal and the second seal are respectively covered on the light outlet and the mounting port, which can better adapt to the optical machine and lens in different positions, improve the sealing performance of the sealing component, and effectively prevent dust, water vapor or other impurities from entering the interior of the device; the first seal and the second seal are respectively adapted to the light outlet and the light inlet, which can increase the flexibility and adaptability of the sealing component to ensure the sealing effect, which is beneficial to improving the stability and imaging quality of the optical system.

[0022] In some embodiments of the present application, there are multiple mounting openings, and the multiple mounting openings are arranged on the housing at intervals;

[0023] The sealing assembly includes a first sealing member and a plurality of second sealing members. The first sealing member is covered on the light outlet, and the plurality of second sealing members are covered on the plurality of installation openings in a one-to-one correspondence.

[0024] With this arrangement, the first seal and the second seal are respectively covered on the light outlet and the mounting port, which can better adapt to the optical machine and lens in different positions, improve the sealing performance of the sealing component, and effectively prevent dust, water vapor or other impurities from entering the interior of the device; the first seal and the second seal are respectively adapted to the light outlet and the light inlet, which can increase the flexibility and adaptability of the sealing component to ensure the sealing effect, which is beneficial to improving the stability and imaging quality of the optical system.

[0025] In some embodiments of the present application, the lens includes a reflector and a first lens, the optical engine and the reflector are respectively located at opposite ends of the housing, the reflector is located on the light output side of the optical engine and on the light input side of the light outlet; the light beam enters the housing through the light inlet and sequentially passes through the optical engine, the reflector, the first lens, and the light outlet to exit the housing; a mounting portion is provided on the inner wall of the housing;

[0026] The reflector abuts against the mounting portion; and / or the first lens is detachably mounted on the sealing assembly covering the light outlet; and / or the first lens abuts against the mounting portion.

[0027] With this arrangement, the first lens can be detachably mounted on the sealing assembly, making it convenient for staff to replace or maintain it, thereby improving the maintainability and reliability of the laser projection equipment; the mounting portion can ensure that the reflector is firmly fixed inside the shell, avoiding loosening or displacement during use, thereby ensuring the stability and accuracy of the reflector, and thereby ensuring the normal operation of the laser projection equipment.

[0028] In some embodiments of the present application, when the sealing assembly includes a first sealing member and a second sealing member, the first sealing member is covered on the light outlet, and the second sealing member is covered on the mounting port,

[0029] The first sealing member has a first through hole and a second through hole corresponding to the light outlet, the first through hole and the second through hole are spaced apart along the transmission direction of the light beam, and the first lens is mounted on a hole wall between the first through hole and the second through hole along the transmission direction of the light beam;

[0030] The first sealing member is threadedly connected to the housing.

[0031] With this arrangement, the first lens can be installed on the seal, which can ensure the stable installation and position accuracy of the first lens, which is beneficial to the performance and imaging quality of the optical system; the first seal is screwed to the shell, which can improve the connection stability and sealing between the seal and the shell, effectively prevent dust, water vapor or other impurities from entering the interior of the shell, and protect the optical machine and lens from contamination or damage; the first seal can effectively fix and protect the first lens, while ensuring the stability and reliability of the laser projection equipment.

[0032] In some embodiments of the present application, when there are multiple mounting openings, the housing has a first mounting opening and a second mounting opening, the first mounting opening is close to the light inlet, and the first mounting opening is used for loading and unloading the optical machine;

[0033] The second mounting port is close to the light outlet, and the second mounting port is used for installing and removing the reflector;

[0034] There are multiple second sealing members, a portion of which are covered on the first installation opening in a one-to-one correspondence, and the remaining portion of which are covered on the second installation opening in a one-to-one correspondence.

[0035] With such a configuration, by setting the first mounting port and the second mounting port, the staff can easily replace or maintain the optical machine and the lens without disassembling the entire sealing assembly, thereby improving the convenience and efficiency of operation; the number of the first mounting port and the second mounting port can be set according to specific needs, thereby adapting to different laser projection equipment requirements; multiple second sealing members can further ensure the sealing performance of the mounting port, protect the optical machine and the lens from the influence of the external environment, and improve the stability and reliability of the laser projection equipment; by setting the positions of the first mounting port and the second mounting port, the assembly layout of the optical machine, the reflector and the first lens is reasonable, which is convenient for operation and maintenance; the loading and unloading process of the optical machine, the reflector and the first lens is simple and quick, which can improve the work efficiency of the staff and reduce the time cost of maintaining and replacing the lens and the optical machine.

[0036] In some embodiments of the present application, the lens further includes a second lens and a third lens; the second lens and the third lens are both located between the reflector and the optical engine, and are spaced apart;

[0037] The second lens is arranged closer to the optical machine relative to the third lens, and the third lens is arranged closer to the reflector relative to the second lens;

[0038] The first mounting port is located between the optical engine and the second lens, and is used for loading and unloading at least one of the optical engine and the second lens, so as to complete the assembly of the optical engine and the lens;

[0039] There are two second mounting ports, one of which is located between the third lens and the reflector, and the other is located between the reflector and the first seal. The second mounting ports are used to load and remove at least one of the third lens and the reflector to complete the assembly of the lens.

[0040] With such an arrangement, by setting a first mounting port and two second mounting ports, the optical machine, lens and reflector can be loaded and unloaded, thereby facilitating the assembly and maintenance of the lens; through the cylindrical shell and the circular, curved second mounting ports and seals, the alignment accuracy between the lenses can be improved, the assembly tolerance can be reduced, and the assembly accuracy and stability of the lens can be guaranteed; the optical machine and lens can be loaded and unloaded separately or simultaneously, thereby improving assembly efficiency and reducing assembly time; by installing the reflector, the second lens and the third lens in the shell, a stable connection between the various components of the lens can be guaranteed, reducing lens performance problems caused by looseness or instability; staff can complete assembly and maintenance more easily, improving the convenience and safety of operation.

[0041] In some embodiments of the present application, the second sealing member is threadedly connected to the housing;

[0042] and / or,

[0043] The shell has a bearing surface coated with an adhesive layer. The second sealing member is covered on the bearing surface and bonded to the shell.

[0044] With this arrangement, the second sealing member can be effectively sealed by threaded connection or bonding with the housing, protecting the optical machine and lens from the external environment; a firm connection can be formed between the second sealing member and the housing, thereby enhancing the stability and durability of the overall structure.

[0045] In a second aspect, an embodiment of the present application provides a laser projection device, including a light source, an optical engine, a lens, a housing, and a sealing assembly.

[0046] The light source is used to provide a light beam;

[0047] The optical engine is located at the light-emitting side of the light source and is used to receive the light beam;

[0048] The lens is located on the light-emitting side of the optical machine and is used to receive the light beam and project it onto the imaging surface;

[0049] The housing is a single piece, having at least two openings for light conduction. The optical engine and the lens are both located within the housing. The optical engine is positioned relative to one of the openings and closer to the other opening. The lens is positioned relative to the other opening and closer to one of the openings. The light source is oriented toward the opening closer to the optical engine. The light beam enters the housing through the other opening and exits the housing through one of the openings.

[0050] The sealing assembly at least covers the opening close to the lens;

[0051] The housing and the sealing assembly are jointly configured to load the optical engine and the lens and seal them, so as to complete the assembly of the optical engine and the lens.

[0052] The laser projection device of the embodiment of the present application can install and fix the optical engine and lens by providing an integrated shell to ensure the stability of the laser projection device; the optical engine and lens are both installed on the shell, and the assembly tolerance between the optical engine and the lens is small, which can improve the positional accuracy between the optical engine and the lens and improve the optical performance of the laser projection device; by forming an opening on the shell, the staff can load and unload the optical engine and lens through the opening, which is convenient for replacing or maintaining the optical engine and lens; by installing the lens inside the shell, no external structure is required, which is conducive to miniaturization of the laser projection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the implementation methods in the embodiments of the present application or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technology descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0054] Figure 1 A schematic diagram of a three-dimensional structure of a laser projection device provided in an embodiment of the present application;

[0055] Figure 2 A schematic diagram of a three-dimensional structure of a housing of a laser projection device provided in an embodiment of the present application;

[0056] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at AA';

[0057] Figure 4 A schematic diagram of another exploded structure of the laser projection device provided in an embodiment of the present application;

[0058] Figure 5 A schematic diagram of another three-dimensional structure of the laser projection device provided in an embodiment of the present application;

[0059] Figure 6 A schematic diagram of another three-dimensional structure of the housing of the laser projection device provided in an embodiment of the present application;

[0060] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure at BB';

[0061] Figure 8 A schematic diagram of another exploded structure of a laser projection device provided in an embodiment of the present application at a certain viewing angle;

[0062] Figure 9 A schematic diagram of another exploded structure of the laser projection device provided in an embodiment of the present application from another perspective;

[0063] Figure 10 Schematic diagram of the optical path of the laser projection device provided in an embodiment of the present application.

[0064] Description of reference numerals:

[0065] 10-Laser projection equipment;

[0066] 100-light source;

[0067] 200-light engine; 210-light valve;

[0068] 300-lens;

[0069] 310 - reflector; 320 - first lens; 330 - second lens; 340 - third lens;

[0070] 400-housing; 401-opening;

[0071] 410-light inlet;

[0072] 420-light outlet;

[0073] 430-installation port; 431-first installation port; 432-second installation port;

[0074] 440-Installation Department;

[0075] 450-bearing surface;

[0076] 500-seal assembly;

[0077] 510 - first sealing member; 511 - first through hole; 512 - second through hole; 520 - second sealing member. DETAILED DESCRIPTION

[0078] In related art, the lens system within a projection device typically consists of lenses, a sleeve, and spacers. The lenses, which focus and form images, are mounted within the sleeve in a specific order and position. The sleeve houses and secures the lenses, ensuring their precise positioning and stability. The spacers adjust the spacing and position between the lenses to ensure optimal optical system performance and image quality.

[0079] In the above-mentioned sleeve-type assembly method, on the one hand, the staff needs to have relatively precise design and processing capabilities to ensure the correct position and alignment of the lenses, which makes assembly more difficult; on the other hand, the lenses need to be sleeved in a specific order. If the lenses are replaced or maintained, the entire sleeve structure needs to be disassembled, which is difficult and has high maintenance costs; finally, the light beam in the straight lens is transmitted along its own axis, and an external reflector is required to change the light path, which is not conducive to the miniaturization design of the laser projection equipment.

[0080] In view of this, an embodiment of the present application provides a laser projection device, including a light source, an optical engine, a lens and a housing; the light source is used to provide a light beam; the optical engine is located on the light-emitting side of the light source, for receiving the light beam; the lens is located on the light-emitting side of the optical engine, for receiving the light beam and projecting it onto an imaging surface; the housing is an integral part, the housing has at least two openings for light conduction, the optical engine and the lens are both located in the housing, the optical engine is close to the other opening relative to one of the openings, the lens is close to one of the openings relative to the other opening, and the light source is facing the opening close to the light engine; a sealing assembly is at least covered on the opening close to the lens; the housing and the sealing assembly are jointly configured to load the optical engine and the lens and seal them to complete the assembly of the optical engine and the lens.

[0081] The laser projection device of the embodiment of the present application can install and fix the optical engine and lens by providing an integrated shell to ensure the stability of the laser projection device; the optical engine and lens are both installed on the shell, and the assembly tolerance between the optical engine and the lens is small, which can improve the positional accuracy between the optical engine and the lens and improve the optical performance of the laser projection device; by forming an opening on the shell, the staff can load and unload the optical engine and lens through the opening, which is convenient for replacing or maintaining the optical engine and lens; by installing the lens inside the shell, no external structure is required, which is conducive to miniaturization of the laser projection device.

[0082] 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, not all of the embodiments.

[0083] It should be noted that the brief descriptions of terms in this application are only for the purpose of facilitating the understanding of the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their ordinary and usual meanings.

[0084] In addition, the terms "comprises" and "comprising" 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 product or device.

[0085] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this 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 cannot be understood as a limitation on this application.

[0086] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0087] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0088] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0089] Reference Figures 1-10 As shown, in a first aspect, an embodiment of the present application provides a laser projection device 10 , including a light source 100 , an optical engine 200 , a lens 300 and a housing 400 .

[0090] The light source 100 is used to provide a light beam. The light source 100 may be a laser light source for providing an illumination beam. For example, the light source 100 may be a three-color light source, including red, blue, and green, to display a color image. Alternatively, the light source 100 may be a monochromatic light source, displaying a color image through different colored phosphors, a filter wheel, or the like.

[0091] The optical engine 200 is located on the light-emitting side of the light source 100 and is used to receive the light beam. The lens 300 is located on the light-emitting side of the optical engine 200 and is used to receive the light beam and project it onto the imaging surface.

[0092] The optical engine 200 receives and processes the light beam from the light source 100. After being conditioned and processed by the optical engine 200, the light beam is directed to the lens 300. The lens 300 receives the light beam and further focuses and forms an image. After processing by the optical engine 200 and the lens 300, the light beam is projected onto an imaging surface. This imaging surface can be displayed on a projection screen or other display device, producing a clear image.

[0093] Exemplarily, the optical engine 200 may include a light valve 210, which is used to receive and direct a light beam, such as to modulate the light beam and allow the modulated light beam to enter the lens group of the lens 300 for imaging. Furthermore, as another example, the light valve 210 may be a digital micromirror device (DMD) or a liquid crystal on silicon (LCOS), either of which may be applicable.

[0094] The housing 400 is a one-piece piece. It is understood that the housing 400 being a one-piece piece may mean being directly formed by injection molding, die casting, or other molding processes, or may mean being connected into an integrated structure by processes such as welding. A one-piece housing 400 can provide better structural stability and sealing.

[0095] Reference Figures 1-9 As shown, the housing 400 has at least two light-conducting openings 401. It should be noted that light-conducting refers to the channel inside the housing 400, that is, the cavity of the housing 400, which is used to guide the transmission and focusing of the light beam, which is conducive to optimizing the performance and imaging quality of the optical system.

[0096] It should be noted that the number of the openings 401 may be at least two, such as two to four, four to six, six to eight, etc. The embodiment of the present application does not limit the specific number of the openings 401, nor is it limited to the above examples.

[0097] Reference Figures 1-9As shown, it can be understood that the opening 401 can at least include a light inlet 410 for light intake and a light outlet 420 for light output, that is, in the laser projection device 10, the light source 100 emits a light beam, which enters the shell 400 through the light inlet 410 and is output from the shell 400 through the light outlet 420.

[0098] It should be noted that the shape of the shell 400 can be arbitrary, and the embodiment of the present application does not limit the shape of the shell 400. In order to achieve the miniaturization of the laser projection device 10, the light inlet 410 and the light outlet 420 can both be opened on the side of the shell 400 to reduce the axial size of the shell 400.

[0099] Reference Figures 1-9 As shown, the optical engine 200 and the lens 300 are both located within the housing 400, that is, both located within the internal channel of the housing 400, that is, located on the transmission path of the light beam. The optical engine 200 is positioned closer to the other opening 401 relative to one of the openings 401, and the lens 300 is positioned closer to one of the openings 401 relative to the other opening 401. One of the openings 401 can be the light outlet 420, and the other opening 401 can be the light inlet 410. That is, the optical engine 200 is positioned closer to the light inlet 410 relative to the light outlet 420, and the lens 300 is positioned closer to the light outlet 420 relative to the light inlet 410.

[0100] Reference Figures 1-10 As shown, the light source 100 is facing the opening 401 close to the optical machine 200, that is, the light source 100 is facing the light inlet 410. In this way, after the light source 100 emits a light beam, the light beam can enter the shell 400 through the light inlet 410 and be emitted toward the optical machine 200, so that the optical machine 200 can receive the light beam and modulate it; after the optical machine 200 modulates the light beam, the modulated light beam is emitted toward the lens 300, and the lens 300 can change the transmission path of the light beam to emit the light beam toward the light outlet 420, and then project it onto the imaging surface.

[0101] It should be noted that when the light source 100 is facing the light inlet 410, the light source 100 can abut against the shell 400 to seal the light inlet 410. On the one hand, it can prevent external impurities or dust from entering the interior of the device, thereby protecting the light source 100 and other key components from contamination or damage; on the other hand, it can enable the shell 400 and the light source 100 to support each other, ensuring that the light source 100 maintains a stable position during use, reducing the risk of damage or failure due to external vibration or movement.

[0102] The sealing assembly 500 covers at least the opening 401 near the lens 300, that is, at least the light outlet 420. That is, the sealing assembly 500 may not only cover the light outlet 420, but also cover other openings 401 when there are more than two openings 401.

[0103] It can be understood that by covering the light outlet 420 with a sealing assembly 500, on the one hand, dust, water vapor or other impurities can be effectively prevented from entering the interior of the housing 400, protecting the lens 300 and the optical machine 200 from contamination or damage; on the other hand, the scattering or reflection of the light beam can be reduced to ensure the smooth transmission of the light beam through the lens 300, thereby improving the imaging quality and clarity.

[0104] The housing 400 and the sealing assembly 500 are jointly configured to house and seal the optical engine 200 and the lens 300 to complete the assembly of the optical engine 200 and the lens 300 .

[0105] Specifically, the assembly process of the optical engine 200 and the lens 300 is as follows:

[0106] First, the optical engine 200 is placed in the housing 400 through the light inlet 410, and the lens 300 is placed in the housing 400 through the light outlet 420. It is necessary to ensure that the optical engine 200 faces the light inlet 410 so that the optical engine 200 receives and processes the light beam emitted by the light source 100. Furthermore, it is necessary to ensure that the light input side of the lens 300 faces the optical engine 200, and the light output side of the lens 300 faces the light outlet 420 so that the lens 300 receives the light beam processed by the optical engine 200, focuses it, and forms an image, which can then be projected onto the imaging surface.

[0107] Then, the light source 100 is placed over the light inlet 410, and the sealing assembly 500 is placed near the light outlet 420 to complete the assembly of the optical engine 200 and the lens 300. It is necessary to ensure that the sealing assembly 500 is in complete contact with the housing 400 to form an effective seal, thereby preventing dust, moisture, or other impurities from entering the housing 400, protecting the lens 300 and the optical engine 200 from contamination or damage, and thus ensuring the normal operation of the lens 300 and the optical engine 200, thereby extending the service life of the lens 300 and the optical engine 200.

[0108] It is understandable that in order to ensure the fit between the light source 100 and the shell 400 located at the light inlet 410, the surface of the shell 400 where the light inlet 410 is located can be a flat surface. For example, the shape of the shell 400 containing the optical machine 200 can be a cube.

[0109] It should be noted that during the assembly process of the optical engine 200 and the lens 300, since both are installed in the housing 400, the assembly tolerance of the laser projection device 10 only includes the installation tolerance between the optical engine 200 and the housing 400, and the installation tolerance between the lens 300 and the housing 400. The assembly tolerance between the optical engine 200 and the lens 300 is relatively small, which can improve the positional accuracy between the optical engine 200 and the lens 300, and thus improve the optical performance of the laser projection device 10. Of course, the housing 400 needs to meet certain precision requirements to meet the alignment accuracy between the optical engine 200 and the lens 300.

[0110] When the staff needs to replace or maintain the optical engine 200 or the lens 300, they only need to disassemble the light source 100 or the sealing assembly 500 to access and take the optical engine 200 or the lens 300. The required steps are reduced and the implementation method is simpler, which can improve the efficiency of replacement or maintenance.

[0111] It is understandable that when the optical machine 200 is loaded and unloaded through the light inlet 410, the size of the light inlet 410 needs to meet the minimum size for loading and unloading the optical machine 200, such as the optical machine 200 can be provided with the light inlet 410; when the lens 300 is loaded and unloaded through the light outlet 420, the size of the light outlet 420 needs to meet the minimum size for loading and unloading the lens 300, such as the lens 300 can be provided with the light outlet 420. In addition, the shape of the light inlet 410 and the light outlet 420 can be rectangular, circular, or other shapes, that is, the shape of the opening 401 can be rectangular, circular, or other shapes. The embodiment of the present application does not limit the specific size, specific shape, etc. of the light inlet 410 and the light outlet 420, and it is sufficient that the above requirements are met.

[0112] It should be noted that the sealing assembly 500 can be sealed in any manner. For example, the sealing assembly 500 can be bonded by adhesive, screwed, or welded. The embodiments of the present application do not limit the specific method of sealing the sealing assembly 500 and the housing 400, nor are they limited to the above examples.

[0113] The laser projection device 10 of the embodiment of the present application can install and fix the optical engine 200 and the lens 300 by providing an integrated shell 400 to ensure the stability of the laser projection device 10; the optical engine 200 and the lens 300 are both installed on the shell 400, and the assembly tolerance between the optical engine 200 and the lens 300 is small, which can improve the positional accuracy between the optical engine 200 and the lens 300, and can improve the optical performance of the laser projection device 10; by forming an opening 401 on the shell 400, the staff can load and unload the optical engine 200 and the lens 300 through the opening 401, which is convenient for replacing or maintaining the optical engine 200 and the lens 300.

[0114] Reference Figure 4-Figure 9 As shown, in some possible embodiments, the housing 400 has more than two openings 401. The opening 401 facing the light source 100 is the light inlet 410, and the opening 401 closer to the lens 300 relative to the light inlet 410 is the light outlet 420. Along the transmission path of the light beam, the opening 401 located between the light inlet 410 and the light outlet 420 is the mounting opening 430. The mounting opening 430 is used to install and remove at least one of the optical engine 200 and the lens 300 to complete the assembly of the optical engine 200 and the lens 300. The sealing assembly 500 is provided to cover at least the light outlet 420 and the mounting opening 430.

[0115] It can be understood that the position of the mounting port 430 can be arbitrary. For example, the mounting port 430 can be close to the light inlet 410 relative to the light outlet 420 to load and unload the optical machine 200; in another example, the mounting port 430 can also be close to the light outlet 420 relative to the light inlet 410 to load and unload the lens 300; in another example, the number of mounting ports 430 is more than one, wherein a part of the mounting ports 430 are close to the light inlet 410 relative to the light outlet 420 to load and unload the optical machine 200, and the remaining number of the mounting ports 430 are close to the light outlet 420 relative to the light inlet 410 to load and unload the lens 300.

[0116] It is understandable that when at least one of the optical machine 200 and the lens 300 is installed or removed through the installation port 430 , the size requirements of the installation port 430 may refer to the above description and are not repeated here.

[0117] Through the above-mentioned setting, the mounting port 430 can facilitate the loading and unloading operations of the optical engine 200 and the lens 300, reducing the complexity and difficulty of assembly and improving the assembly efficiency; in addition, the setting of the mounting port 430 allows the optical engine 200 and the lens 300 to be loaded and unloaded separately, thereby improving the flexibility and convenience of replacing or maintaining the laser projection device 10 and reducing maintenance costs.

[0118] Reference Figure 4-Figure 9 As shown, in some possible implementations, the sealing assembly 500 includes a first sealing member 510 and a second sealing member 520 . The first sealing member 510 covers the light outlet 420 , and the second sealing member 520 covers the installation port 430 .

[0119] It is understood that the first seal 510 needs to be adapted to the light outlet 420 to ensure that it is completely attached to and covers the light outlet 420, forming an effective seal to prevent dust, water vapor, or other impurities from entering the interior of the housing 400, thereby protecting the lens 300 and the optical engine 200 from contamination or damage. Similarly, the second seal 520 needs to be adapted to the mounting port 430 to ensure that it is completely attached to and covers the mounting port 430, thereby forming an effective seal to prevent dust, water vapor, or other impurities from entering the interior of the housing 400, thereby protecting the lens 300 and the optical engine 200 from contamination or damage.

[0120] By setting a first seal 510 and a second seal 520, and covering them on the light outlet 420 and the mounting port 430 respectively, the optical machine 200 and the lens 300 in different positions can be better adapted, thereby improving the sealing performance of the sealing assembly 500 and effectively preventing dust, water vapor or other impurities from entering the interior of the device; the first seal 510 and the second seal 520 are adapted to the light outlet 420 and the light inlet 410 respectively, which can increase the flexibility and adaptability of the sealing assembly 500 to ensure the sealing effect, which is beneficial to improving the stability and imaging quality of the optical system.

[0121] Among them, reference Figure 4-Figure 9 As shown, in some embodiments, the mounting port 430 is closer to the light inlet 410 than the light outlet 420, and the mounting port 430 is used to load and unload the optical engine 200 to facilitate assembly of the optical engine 200 and the lens 300. In this case, the light outlet 420 can be used to load and unload the lens 300, and both the mounting port 430 and the light inlet 410 can be used to load and unload the optical engine 200. It is understandable that in order to ensure the positional accuracy between the light source 100 and the light inlet 410, only the mounting port 430 can be used to load and unload the optical engine 200. In this way, when the staff needs to replace or maintain at least one of the optical engine 200 and the lens 300, they only need to remove the sealing assembly 500 to complete the replacement or maintenance.

[0122] In other embodiments, referring to Figure 4-Figure 9 As shown, the mounting port 430 is located near the light outlet 420 relative to the light inlet 410. The mounting port 430 is used to install and remove the lens 300, thereby completing the assembly of the optical engine 200 and the lens 300. In this case, the light inlet 410 can be used to install and remove the optical engine 200, and both the mounting port 430 and the light outlet 420 can be used to install and remove the lens 300. It is understood that in order to ensure the positional accuracy between the lens 300 and the light outlet 420, only the mounting port 430 can be used to remove the lens 300. In this way, when the staff needs to replace or maintain at least one of the optical engine 200 and the lens 300, they only need to remove the sealing assembly 500 to complete the replacement or maintenance.

[0123] Reference Figure 4-Figure 9 As shown, in some possible implementations, there are multiple mounting openings 430 .

[0124] It is understandable that the number of the mounting openings 430 can be any number, such as two to four, four to six, six to eight, etc. The embodiment of the present application does not limit the specific number of the mounting openings 430 , nor is it limited to the above examples.

[0125] A plurality of mounting ports 430 are arranged at intervals on the housing 400. It will be understood that there are many ways to arrange the intervals. For example, the plurality of mounting ports 430 can be evenly distributed on the housing 400 at the same intervals, or can be arranged on the housing 400 at different intervals to meet specific installation needs or design requirements. Another example is that the plurality of mounting ports 430 can be concentrated in a certain area or specific position of the housing 400 to facilitate the installation of multiple components or the connection of multiple devices, which can improve the installation efficiency and convenience and reduce the installation space occupied. The embodiment of the present application does not limit the specific form of the spacing of the plurality of mounting ports 430 on the housing 400, nor is it limited to the above examples.

[0126] The sealing assembly 500 includes a first sealing member 510 and multiple second sealing members 520. The first sealing member 510 covers the light outlet 420, and the multiple second sealing members 520 cover the multiple mounting openings 430 in a one-to-one correspondence. The functions of the first sealing member 510 and the second sealing member 520 can be referred to above and will not be repeated here.

[0127] Through the above-mentioned setting, by setting the first seal 510 and the second seal 520, and covering them on the light outlet 420 and the installation port 430 respectively, the optical machine 200 and the lens 300 in different positions can be better adapted, the sealing performance of the sealing component 500 can be improved, and dust, water vapor or other impurities can be effectively prevented from entering the interior of the device; the first seal 510 and the second seal 520 are respectively adapted to the light outlet 420 and the light inlet 410, which can increase the flexibility and adaptability of the sealing component 500 to ensure the sealing effect, which is beneficial to improving the stability and imaging quality of the optical system.

[0128] Reference Figure 4-10 As shown, in some possible implementations, the lens 300 includes a reflector 310 and a first lens 320 .

[0129] The reflector 310 is used to reflect, refract, or focus a light beam to change the light path or direction. For example, the reflector 310 can be a plane mirror, which is used to reflect the propagation direction of the light. For another example, the reflector 310 can be a curved mirror, which can be convex or concave, and is used to focus or scatter light. For another example, the reflector 310 can be a refraction mirror, which is used to achieve both reflection and refraction effects.

[0130] The first lens 320 is used to focus, scatter, or modify the optical properties of a light beam. For example, the first lens 320 can be a convex lens, which is thick in the middle and thin at the edges, and can focus light to a focal point for imaging. Another example is a concave lens, which is thin in the middle and thick at the edges, and can diverge light to reduce the size of the image. In yet another example, the first lens 320 can be a prism, which has a triangular cross-section and can refract or split light.

[0131] The optical engine 200 and the reflector 310 are located at opposite ends of the housing 400. The reflector 310 is located on the light-exiting side of the optical engine 200 and on the light-entering side of the light outlet 420, and is used to reflect the light beam and guide it to the first lens 320. The first lens 320 is located after the light beam passes through the reflector 310 and is used to further adjust the focal length or optical properties of the light beam. The light beam enters the housing 400 through the light inlet 410 and exits the housing 400 through the optical engine 200, the reflector 310, the first lens 320, and the light outlet 420 in sequence, to be projected onto the imaging surface.

[0132] Reference Figure 4 、 Figure 7 as well as Figure 8 As shown, a mounting portion 440 is provided on the inner wall of the housing 400 .

[0133] Specifically, the mounting portion 440 can be integrally formed with the housing 400. The mounting portion 440 can be a protrusion or a rib. The embodiment of the present application does not limit the specific form of the mounting portion 440, nor is it limited to the above example.

[0134] In some embodiments, the reflector 310 abuts against the mounting portion 440 to ensure that the reflector 310 can be more securely fixed inside the housing 400. It is understood that the end surface of the mounting portion 440 facing the reflector 310 can be used to abut the reflector 310, and the staff can change the position and reflection direction of the reflector 310 by designing the end surface with different degrees of inclination. It is understood that the reflector 310 can be bonded to the mounting portion 440 using adhesive. For example, before assembling the reflector 310, glue can be applied to the mounting portion 440, glue can be applied to the surrounding side surfaces of the reflector 310, or glue can be applied to both the mounting portion 440 and the surrounding side surfaces of the reflector 310; then, the reflector 310 is abutted against the mounting portion 440 to bond the reflector 310 to the mounting portion 440, thereby completing the assembly of the reflector 310.

[0135] Reference Figure 4-Figure 9 As shown, in some embodiments, the first lens 320 is removably mounted on the sealing assembly 500 covering the light outlet 420, making it easier for staff to replace or maintain the first lens 320. It should be noted that the reflector 310 and the first lens 320 both have a reflective surface and a peripheral side surface, with the peripheral side surface being disposed around the periphery of the reflective surface. When the reflector 310 abuts the mounting portion 440, in order to prevent the mounting portion 440 from interfering with the reflective function of the reflective surface, the mounting portion 440 may only abut the peripheral side surface.

[0136] Reference Figure 4-Figure 9 As shown, in some embodiments, the first lens 320 abuts against the mounting portion 440 to ensure that the first lens 320 can be more firmly fixed inside the housing 400. It is understood that the end surface of the mounting portion 440 facing the first lens 320 can be used to abut the first lens 320, and the first lens 320 can be bonded to the mounting portion 440 using adhesive. Exemplarily, before assembling the first lens 320, adhesive can be applied to the mounting portion 440, or to the side surfaces of the first lens 320, or to both the mounting portion 440 and the side surfaces of the first lens 320; then, the first lens 320 abuts against the mounting portion 440 to bond the first lens 320 to the mounting portion 440, thereby completing the assembly of the first lens 320.

[0137] It is understandable that the cross-sections of the reflector 310 and the first lens 320 of the lens 300 are generally circular, and therefore, the shape of the portion of the housing 400 for housing the lens 300 may be cylindrical.

[0138] Through the above-mentioned arrangement, the first lens 320 can be detachably mounted on the sealing assembly 500, which is convenient for the staff to replace or maintain, thereby improving the maintainability and reliability of the laser projection device 10; the mounting portion 440 can ensure that the reflector 310 is firmly fixed inside the shell 400, avoiding loosening or displacement during use, thereby ensuring the stability and accuracy of the reflector 310, and thus ensuring the normal operation of the laser projection device 10.

[0139] Reference Figure 4-Figure 9 As shown, in some possible embodiments, when the sealing assembly 500 includes a first sealing member 510 and a second sealing member 520, the first sealing member 510 covers the light outlet 420, and the second sealing member 520 covers the mounting port 430, the first sealing member 510 has a first through hole 511 and a second through hole 512 corresponding to the light outlet 420, the first through hole 511 and the second through hole 512 are spaced apart along the transmission direction of the light beam, and the first lens 320 is mounted on the hole wall between the first through hole 511 and the second through hole 512 along the transmission direction of the light beam.

[0140] It should be noted that the shapes of the first through hole 511 and the second through hole 512 can be the same or different; the sizes of the first through hole 511 and the second through hole 512 can be the same or different. The embodiment of the present application does not limit the shapes and sizes of the first through hole 511 and the second through hole 512, nor is it limited to the above example. In the embodiment of the present application, the shapes and sizes of the first through hole 511 and the second through hole 512 can be adapted to the first lens 320 to complete the installation of the first lens 320. For example, along the transmission direction of the light beam, the cross-sectional shape of the first lens 320 is circular, that is, the shape of the first seal 510 can be cylindrical, and the first through hole 511 and the second through hole 512 are both circular holes to install the first lens 320.

[0141] It is understandable that there may be multiple first lenses 320 , and the multiple first lenses 320 may be spaced apart in the first sealing member 510 to modulate the light beam reflected by the reflector 310 so as to project the light beam onto the imaging surface.

[0142] Furthermore, the first sealing member 510 is screwed to the housing 400. Exemplarily, the outer peripheral surface of the first sealing member 510 may have an external thread, the housing 400 located at the light outlet 420 may have an internal thread, and the first sealing member 510 is threadedly connected to the housing 400. It should be noted that when the first sealing member 510 is located inside the housing 400, the light outlet 420 of the housing 400 is the side of the first sealing member 510 away from the housing 400; when the first sealing member 510 is located outside the housing 400, the light outlet 420 of the housing 400 is the side of the first sealing member 510 close to the housing 400. In this process, the light beam reflected by the reflector 310 is modulated by the first lens 320 and finally projected onto the imaging surface.

[0143] It should be noted that, in order to install the first lens 320 , a shoulder for installing the first lens 320 can be formed on the inner wall of the first seal 510 , so that the light-transmitting surface of the first lens 320 can transmit light and the peripheral side surface of the first lens 320 can abut against the shoulder of the first seal 510 .

[0144] It is understandable that, in order to enhance the installation stability of the first lens 320 , adhesive may be provided between the first lens 320 and the shoulder of the first sealing member 510 so as to bond the first lens 320 to the first sealing member 510 .

[0145] Through the above-mentioned setting, the first lens 320 can be installed on the seal, which can ensure the stable installation and position accuracy of the first lens 320, which is beneficial to the performance and imaging quality of the optical system; the first seal 510 is screwed to the shell 400, which can improve the connection stability and sealing between the seal and the shell 400, effectively prevent dust, water vapor or other impurities from entering the interior of the shell 400, and protect the optical machine 200 and the lens 300 from contamination or damage; the first seal 510 can effectively fix and protect the first lens 320, while ensuring the stability and reliability of the laser projection device 10.

[0146] Reference Figure 5-Figure 9 As shown, in some possible implementations, when there are multiple mounting openings 430 , the housing 400 has a first mounting opening 431 and a second mounting opening 432 .

[0147] The first mounting opening 431 is located near the light inlet 410 and is used for installing and removing the optical engine 200. This allows operators to replace or maintain the optical engine 200 by simply removing the second sealing member 520 of the sealing assembly 500. The second mounting opening 432 is located near the light outlet 420 and is used for installing and removing the reflector 310. This allows operators to replace or maintain the reflector 310 of the lens 300 by simply removing the second sealing member 520 of the sealing assembly 500.

[0148] For example, the number of the first mounting openings 431 and the second mounting openings 432 can be any number, such as one or two, two to four, four to six, six to eight, etc. The specific number of the first mounting openings 431 and the second mounting openings 432 in the embodiment of the present application is not limited, nor is it limited to the above examples.

[0149] There are multiple second sealing members 520. It is understood that the number of second sealing members 520 can be equal to the sum of the number of first mounting openings 431 and the number of second mounting openings 432, so as to seal the mounting openings 430. Therefore, a portion of the second sealing members 520 are disposed in a one-to-one correspondence with the first mounting openings 431, and the remaining portion of the second sealing members 520 are disposed in a one-to-one correspondence with the second mounting openings 432.

[0150] Through the above-mentioned setting, by setting the first mounting port 431 and the second mounting port 432, the staff can easily replace or maintain the optical machine 200 and the lens 300 without disassembling the entire sealing assembly 500, thereby improving the convenience and efficiency of operation; the number of the first mounting port 431 and the second mounting port 432 can be set according to specific needs, so as to adapt to different laser projection equipment 10 requirements; multiple second sealing members 520 can further ensure the sealing performance of the mounting port 430, protect the optical machine 200 and the lens 300 from the influence of the external environment, and improve the stability and reliability of the laser projection equipment 10; by setting the position of the first mounting port 431 and the second mounting port 432, the assembly layout of the optical machine 200, the reflector 310 and the first lens 320 is reasonable, which is convenient for operation and maintenance; the loading and unloading process of the optical machine 200, the reflector 310 and the first lens 320 is simple and quick, which can improve the work efficiency of the staff and reduce the time cost of maintaining and replacing the lens 300 and the optical machine 200.

[0151] Reference Figure 5-Figure 9 As shown, the following description is made by taking the example that the number of the first installation opening 431 is one and the number of the second installation opening 432 is two.

[0152] In an embodiment of the present application, the number of second sealing members 520 can be three, one of which is covered on the first mounting opening 431, and the other two second sealing members 520 are covered on the two second mounting openings 432 one by one. The two second mounting openings 432 can be arranged at intervals on the shell 400, and both are close to the light outlet 420 relative to the light inlet 410.

[0153] Specifically, the first mounting port 431 and one of the second mounting ports 432 are both located on the light incident side of the reflector 310, the first mounting port 431 is close to the light inlet 410 relative to the light outlet 420, and the second mounting port 432 is close to the light outlet 420 relative to the light inlet 410, that is, the first mounting port 431 and the second mounting port 432 are both opened on the side of the shell 400; the other second mounting port 432 is located between the reflector 310 and the first lens 320, and is located at the end of the shell 400 away from the optical machine 200, that is, it is opened on the end face of the shell 400.

[0154] It can be understood that during the assembly process of the optical machine 200 and the lens 300, the optical machine 200 can be loaded and unloaded through the first mounting port 431, the reflector 310 can be loaded and unloaded through the two second mounting ports 432, and the first lens 320 can be loaded and unloaded by disassembling the threaded first seal 510.

[0155] Reference Figure 4-10 As shown, in some possible embodiments, the lens 300 also includes a second lens 330 and a third lens 340; the second lens 330 and the third lens 340 are both located between the reflector 310 and the optical machine 200, and are arranged at intervals; the second lens 330 is arranged close to the optical machine 200 relative to the third lens 340, and the third lens 340 is arranged close to the reflector 310 relative to the second lens 330.

[0156] The second lens 330 and the third lens 340 are both used to adjust and focus the light beam. The second lens 330 is used to perform preliminary adjustment and focusing of the light beam, and the third lens 340 is used to further adjust and focus the light beam so that it is correctly projected onto the reflector 310.

[0157] The first mounting port 431 is located between the optical engine 200 and the second lens 330 and is used for installing and removing at least one of the optical engine 200 and the second lens 330 to complete the assembly of the optical engine 200 and the lens 300. In other words, the first mounting port 431 can be used to install and remove the optical engine 200, the second lens 330, or both.

[0158] Reference Figure 5-Figure 9 As shown, there are two second mounting openings 432 .

[0159] One of the second mounting ports 432 is located between the third lens 340 and the reflector 310, that is, the second mounting port 432 can be used to load and unload the third lens 340, can also be used to load and unload the reflector 310, and can also be used to load and unload the reflector 310 and the third lens 340 at the same time to complete the assembly of the lens 300.

[0160] Another second mounting port 432 is located between the reflector 310 and the first seal 510. The second mounting port 432 is used to load and remove at least one of the third lens 340 and the reflector 310. That is, the second mounting port 432 can be used to load and remove the reflector 310, and can also be used to load and remove the first lens 320 located in the first seal 510. It can also be used to load and remove the reflector 310 and the first lens 320 located in the first seal 510 at the same time to complete the assembly of the lens 300.

[0161] It should be noted that in order to ensure the installation accuracy between the second lens 330 and the third lens 340, the housing 400 located between the second lens 330 and the third lens 340 can be cylindrical. By improving the axial accuracy of this part of the housing 400, the alignment accuracy of the second lens 330 and the third lens 340 can be guaranteed, thereby reducing the assembly tolerance between the second lens 330 and the third lens 340.

[0162] It can be understood that, referring to the previous description, the shape of the part of the shell 400 used to load the lens 300 is cylindrical. Therefore, the second mounting port 432 located between the reflector 310 and the first sealing member 510 is opened on the end face of the shell 400, and its shape is circular, that is, the shape of the second sealing member 520 corresponding to the second mounting port 432 is a circular cover; the second mounting port 432 located between the third lens 340 and the reflector 310 is opened on the side of the shell 400, and its shape is a curved surface, that is, the shape of the second sealing member 520 corresponding to the second mounting port 432 is a curved cover.

[0163] It should be noted that the second lens 330 and the third lens 340 are installed in the same manner as the first lens 320, that is, the second lens 330 and the third lens 340 also have a light-transmitting surface and a peripheral side surface located around the light-transmitting surface, so as to be bonded to the housing 400 by adhesive.

[0164] Through the above-mentioned setting, by setting the first mounting port 431 and the two second mounting ports 432, the loading and unloading of the optical machine 200, the lens and the reflector 310 can be realized, thereby facilitating the assembly and maintenance of the lens 300; through the cylindrical shell 400 and the circular, curved second mounting port 432 and the seal, the alignment accuracy between the lenses can be improved, the assembly tolerance can be reduced, and the assembly accuracy and stability of the lens 300 can be guaranteed; the optical machine 200 and the lens 300 can be loaded and unloaded separately or simultaneously, thereby improving assembly efficiency and reducing assembly time; by installing the reflector 310, the second lens 330 and the third lens 340 in the shell 400, the stable connection between the various components of the lens 300 can be guaranteed, and the performance problems of the lens 300 caused by looseness or instability can be reduced; the staff can complete the assembly and maintenance more easily, thereby improving the convenience and safety of operation.

[0165] Reference Figure 5-Figure 9 As shown, in some possible embodiments, the second sealing member 520 is threadedly connected to the housing 400. For example, the second sealing member 520 in the shape of a circular cover can be threadedly connected to the housing 400, that is, the second sealing member 520 located at the end surface of the housing 400 has an internal thread or an external thread, and the housing 400 at the end surface has a matching external thread or internal thread, so that the second sealing member 520 can seal the second installation port 432.

[0166] In some possible embodiments, the housing 400 has a bearing surface 450 coated with an adhesive layer. The second sealing member 520 is disposed on the bearing surface 450 and bonded to the housing 400. For example, the second sealing member 520, which is shaped as a curved cover, can be bonded to the housing 400 via the adhesive layer. To ensure that the sealed housing 400 has a certain aesthetic appeal, the housing 400 has a bearing surface 450 located between the inner wall and the outer wall along the thickness direction of the housing 400. The second sealing member 520 can be in close contact with the bearing surface 450 and bonded via the adhesive layer to complete the seal.

[0167] Of course, the second sealing member 520 in the shape of a circular cover can also be bonded to the shell 400; the second sealing member 520 in the shape of a curved cover can also be screwed to the shell 400. For example, if the second sealing member 520 in the shape of a curved cover and the shell 400 both have through holes, the second sealing member 520 and the shell 400 can be threadedly connected through a screw connection.

[0168] Through the above-mentioned setting, through the threaded connection or bonding between the second sealing member 520 and the housing 400, effective sealing can be achieved to protect the optical machine 200 and the lens 300 from being affected by the external environment; a firm connection can be formed between the second sealing member 520 and the housing 400, thereby enhancing the stability and durability of the overall structure.

[0169] Reference Figures 1-10 As shown, in a second aspect, an embodiment of the present application provides a laser projection device 10 , including a light source 100 , an optical engine 200 , a lens 300 , a housing 400 and a sealing assembly 500 .

[0170] The light source 100 provides a light beam; the optical engine 200, located on the light-exiting side of the light source 100, receives the light beam; and the lens 300, located on the light-exiting side of the optical engine 200, receives the light beam and projects it onto an imaging surface. The optical engine 200 receives and processes the light beam from the light source 100. After conditioning and processing by the optical engine 200, the light beam is directed to the lens 300. The lens 300 receives the light beam and further focuses and forms an image. After processing by the optical engine 200 and lens 300, the light beam is projected onto an imaging surface. This imaging surface can be formed on a projection screen or other display device, creating a clear image.

[0171] The housing 400 is a single piece and has at least two openings 401 for light conduction. It is understood that the openings 401 may include at least a light inlet 410 for light intake and a light outlet 420 for light output. That is, in the laser projection device 10, the light source 100 emits a light beam, which enters the housing 400 through the light inlet 410 and exits the housing 400 through the light outlet 420.

[0172] The optical engine 200 and the lens 300 are both located within the housing 400, that is, within the internal channel of the housing 400, that is, on the transmission path of the light beam. The optical engine 200 is positioned closer to one of the openings 401 relative to the other, and the lens 300 is positioned closer to one of the openings 401 relative to the other. One of the openings 401 can be the light outlet 420, and the other opening 401 can be the light inlet 410. That is, the optical engine 200 is positioned closer to the light inlet 410 relative to the light outlet 420, and the lens 300 is positioned closer to the light outlet 420 relative to the light inlet 410.

[0173] The light source 100 is directed toward the opening 401 close to the optical machine 200, and the light beam enters the housing 400 through the light inlet 410 and is emitted from the housing 400 through the light outlet 420; that is, the light source 100 is directed toward the light inlet 410, so that when the light source 100 emits a light beam, the light beam can enter the housing 400 through the light inlet 410 and be emitted toward the optical machine 200, so that the optical machine 200 can receive the light beam and modulate it; when the optical machine 200 modulates the light beam, the modulated light beam is emitted toward the lens 300, and the lens 300 can change the transmission path of the light beam to emit the light beam toward the light outlet 420, and then project it onto the imaging surface.

[0174] The sealing assembly 500 covers at least the opening 401 near the lens 300, that is, at least the light outlet 420. That is, the sealing assembly 500 may not only cover the light outlet 420, but also cover other openings 401 when there are more than two openings 401.

[0175] It can be understood that by covering the light outlet 420 with a sealing assembly 500, on the one hand, dust, water vapor or other impurities can be effectively prevented from entering the interior of the housing 400, protecting the lens 300 and the optical machine 200 from contamination or damage; on the other hand, the scattering or reflection of the light beam can be reduced to ensure the smooth transmission of the light beam through the lens 300, thereby improving the imaging quality and clarity.

[0176] The housing 400 and the sealing assembly 500 are jointly configured to house and seal the optical engine 200 and the lens 300 to complete the assembly of the optical engine 200 and the lens 300 .

[0177] Specifically, the assembly process of the optical engine 200 and the lens 300 is as follows:

[0178] First, the optical engine 200 is placed in the housing 400 through the light inlet 410, and the lens 300 is placed in the housing 400 through the light outlet 420. It is necessary to ensure that the optical engine 200 faces the light inlet 410 so that the optical engine 200 receives and processes the light beam emitted by the light source 100. Furthermore, it is necessary to ensure that the light input side of the lens 300 faces the optical engine 200, and the light output side of the lens 300 faces the light outlet 420 so that the lens 300 receives the light beam processed by the optical engine 200, focuses it, and forms an image, which can then be projected onto the imaging surface.

[0179] Then, the light source 100 is placed over the light inlet 410, and the sealing assembly 500 is placed near the light outlet 420 to complete the assembly of the optical engine 200 and the lens 300. It is necessary to ensure that the sealing assembly 500 is in complete contact with the housing 400 to form an effective seal, thereby preventing dust, moisture, or other impurities from entering the housing 400, protecting the lens 300 and the optical engine 200 from contamination or damage, and thus ensuring the normal operation of the lens 300 and the optical engine 200, thereby extending the service life of the lens 300 and the optical engine 200.

[0180] It should be noted that during the assembly process of the optical engine 200 and the lens 300, since both are installed in the housing 400, the assembly tolerance of the laser projection device 10 only includes the installation tolerance between the optical engine 200 and the housing 400, and the installation tolerance between the lens 300 and the housing 400. The assembly tolerance between the optical engine 200 and the lens 300 is relatively small, which can improve the positional accuracy between the optical engine 200 and the lens 300, and thus improve the optical performance of the laser projection device 10. Of course, the housing 400 needs to meet certain precision requirements to meet the alignment accuracy between the optical engine 200 and the lens 300.

[0181] When the staff needs to replace or maintain the optical engine 200 or the lens 300, they only need to disassemble the light source 100 or the sealing assembly 500 to access and take the optical engine 200 or the lens 300. The required steps are reduced and the implementation method is simpler, which can improve the efficiency of replacement or maintenance.

[0182] The laser projection device 10 of the embodiment of the present application can install and fix the optical engine 200 and the lens 300 by providing an integrated shell 400 to ensure the stability of the laser projection device 10; the optical engine 200 and the lens 300 are both installed on the shell 400, and the assembly tolerance between the optical engine 200 and the lens 300 is small, which can improve the positional accuracy between the optical engine 200 and the lens 300, and can improve the optical performance of the laser projection device 10; by forming an opening 401 on the shell 400, the staff can load and unload the optical engine 200 and the lens 300 through the opening 401, which is convenient for replacing or maintaining the optical engine 200 and the lens 300.

[0183] 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 them. 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 make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

[0184] For ease of explanation, the above description has been made with reference to specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations are possible. The above embodiments are selected and described to better explain the principles and practical applications, so that those skilled in the art can better utilize 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 light source for providing a light beam; an optical engine, located at the light-emitting side of the light source, for receiving the light beam; A lens, located on the light-emitting side of the optical machine, for receiving the light beam and projecting it onto an imaging surface; a housing, the housing being a single piece and having at least two openings for light conduction; the optical engine and the lens being both located within the housing; the optical engine being positioned relative to one of the openings and closer to the other opening; the lens being positioned relative to the other opening and closer to one of the openings; and the light source being oriented toward the opening closer to the optical engine; a sealing assembly, at least covering the opening near the lens; The housing and the sealing assembly are jointly configured to load the optical engine and the lens and seal them, so as to complete the assembly of the optical engine and the lens.

2. The laser projection device according to claim 1, characterized in that: The opening toward which the light source faces is a light inlet, and the opening closer to the lens relative to the light inlet is a light outlet. The opening located between the light inlet and the light outlet along the transmission path of the light beam is a mounting port, and the mounting port is used for loading and unloading at least one of the optical engine and the lens to complete the assembly of the optical engine and the lens; The sealing component is at least covered on the light outlet and the installation port.

3. The laser projection device according to claim 2, characterized in that: The sealing assembly includes a first sealing member and a second sealing member, wherein the first sealing member is covered on the light outlet, and the second sealing member is covered on the mounting port; The mounting port is closer to the light inlet than the light outlet, and is used for loading and unloading the optical machine to complete the assembly of the optical machine and the lens; Alternatively, the mounting port is closer to the light outlet relative to the light inlet, and the mounting port is used for mounting and removing the lens to cooperate with each other to complete the assembly of the optical machine and the lens.

4. The laser projection device according to claim 2, characterized in that: There are multiple mounting openings, and the multiple mounting openings are arranged on the housing at intervals; The sealing assembly includes a first sealing member and a plurality of second sealing members. The first sealing member is covered on the light outlet, and the plurality of second sealing members are covered on the plurality of installation openings in a one-to-one correspondence.

5. The laser projection device according to any one of claims 1 to 4, characterized in that: The lens includes a reflector and a first lens. The optical engine and the reflector are respectively located at opposite ends of the housing. The reflector is located on the light-exiting side of the optical engine and on the light-entering side of the light outlet. The light beam enters the housing through the light inlet and sequentially passes through the optical engine, the reflector, the first lens, and the light outlet to exit the housing. A mounting portion is provided on the inner wall of the housing. The reflector abuts against the mounting portion; and / or the first lens is detachably mounted on the sealing assembly covering the light outlet; and / or the first lens abuts against the mounting portion.

6. The laser projection device according to claim 5, characterized in that: When the sealing assembly includes a first sealing member and a second sealing member, the first sealing member is covered on the light outlet, and the second sealing member is covered on the installation port, The first sealing member has a first through hole and a second through hole corresponding to the light outlet, the first through hole and the second through hole are spaced apart along the transmission direction of the light beam, and the first lens is mounted on a hole wall between the first through hole and the second through hole along the transmission direction of the light beam; The first sealing member is threadedly connected to the housing.

7. The laser projection device according to claim 6, characterized in that: When there are multiple mounting openings, the housing has a first mounting opening and a second mounting opening, the first mounting opening is close to the light inlet, and the first mounting opening is used for loading and unloading the optical machine; The second mounting port is close to the light outlet, and the second mounting port is used for installing and removing the reflector; There are multiple second sealing members, a portion of which are covered on the first installation opening in a one-to-one correspondence, and the remaining portion of which are covered on the second installation opening in a one-to-one correspondence.

8. The laser projection device according to claim 7, characterized in that: The lens further includes a second lens and a third lens; the second lens and the third lens are both located between the reflector and the optical machine and are spaced apart; The second lens is arranged closer to the optical machine relative to the third lens, and the third lens is arranged closer to the reflector relative to the second lens; The first mounting port is located between the optical engine and the second lens, and is used for loading and unloading at least one of the optical engine and the second lens, so as to complete the assembly of the optical engine and the lens; There are two second mounting ports, one of which is located between the third lens and the reflector, and the other is located between the reflector and the first seal. The second mounting ports are used to load and remove at least one of the third lens and the reflector to complete the assembly of the lens.

9. The laser projection device according to any one of claims 6 to 8, characterized in that: The second sealing member is threadedly connected to the housing; and / or, The shell has a bearing surface coated with an adhesive layer. The second sealing member is covered on the bearing surface and bonded to the shell.

10. A laser projection device, characterized in that: Including light source, optical machine, lens, housing and sealing components, The light source is used to provide a light beam; The optical engine is located at the light-emitting side of the light source and is used to receive the light beam; The lens is located on the light-emitting side of the optical machine and is used to receive the light beam and project it onto the imaging surface; The housing is a single piece, having at least two openings for light conduction. The optical engine and the lens are both located within the housing. The optical engine is positioned relative to one of the openings and closer to the other opening. The lens is positioned relative to the other opening and closer to one of the openings. The light source is oriented toward the opening closer to the optical engine. The light beam enters the housing through the other opening and exits the housing through one of the openings. The sealing assembly at least covers the opening close to the lens; The housing and the sealing assembly are jointly configured to load the optical engine and the lens and seal them, so as to complete the assembly of the optical engine and the lens.

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