Optical machine module and projection system

Abstract

The utility model relates to the technical field of ray machine modules, and discloses a ray machine module and a projection system, and the ray machine module comprises a ray machine housing which is provided with an accommodation cavity; the prism assembly is arranged in the accommodating cavity; the DMD module is arranged in the optical machine shell and located on one side of the prism assembly; the FPC circuit board is arranged on the ray machine shell and is connected with the DMD module; the radiator module is arranged on the ray machine shell and is positioned on one side of the FPC circuit board; the sealing glue layer is arranged between the prism assembly and the ray machine shell; the first silica gel pad is arranged between the FPC circuit board and the ray machine shell; and the second silica gel pad is arranged between the FPC circuit board and the radiator module. According to the utility model, the sealing glue layer and the silica gel pad are adopted to isolate all gaps, into which water vapor may permeate, of the optical machine module, so that the problem that the water vapor intrudes into the DMD module to cause the failure of the DMD can be prevented, and the service life of the DMD module is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of vehicle-mounted projection system technology, and in particular to an optical engine module and projection system. Background Technology

[0002] Digital micromirror devices (DMDs) are core components of automotive projection optical engines, playing a crucial role in the optical engine module. When DMDs are used in automobiles, the harsh operating environment (85°C & 85% humidity) necessitates the use of a sealed structure to isolate the DMD, protecting its operating environment and meeting various automotive-grade reliability test requirements.

[0003] Traditional DMD sealing methods only use silicone rings between the PCBA and the housing. This sealing method is not airtight and has significant structural defects. Moisture can penetrate into the DMD through two critical paths: the gap between the heat sink and the PCBA, and the gap between the prism and the housing. This unblocked moisture can cause electrochemical corrosion of the micromirror array inside the DMD chip, greatly reducing the DMD's lifespan and severely limiting the reliability of optomechanical equipment in long-term high-temperature and high-humidity environments.

[0004] Therefore, existing technologies still need to be improved and developed. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an optical engine module and projection system to solve the problem of reduced DMD lifespan caused by structural defects in the existing DMD sealing method.

[0006] The technical solution of this utility model is as follows:

[0007] In a first aspect, this utility model provides an optomechanical module, which includes:

[0008] Optical engine housing, with accommodating cavity;

[0009] The prism assembly is disposed within the accommodating cavity;

[0010] The DMD module is disposed inside the optical engine housing and located on one side of the prism assembly;

[0011] An FPC circuit board is mounted on the optomechanical housing and connected to the DMD module;

[0012] A heat sink module is mounted on the optical engine housing and located on one side of the FPC circuit board;

[0013] A sealant layer is disposed between the prism assembly and the optomechanical housing;

[0014] A first silicone pad is disposed between the FPC circuit board and the optomechanical housing;

[0015] A second silicone pad is disposed between the FPC circuit board and the heat sink module.

[0016] In a further embodiment of this invention, a gap is provided between the prism assembly and the optical engine housing; the sealant layer is disposed in the dispensing gap between the prism assembly and the optical engine housing.

[0017] In a further embodiment of this invention, the prism assembly includes a prism and a prism spring.

[0018] The prism is disposed in the accommodating cavity;

[0019] The prism spring is disposed on the optical engine housing and abuts against the prism;

[0020] The sealant layer is located in the dispensing gap between the prism and the optical engine housing.

[0021] A further feature of this invention is that the optical engine housing is provided with a first mounting groove that is adapted to the shape of the first silicone pad, and the first silicone pad is disposed in the first mounting groove.

[0022] The first mounting slot is a square slot;

[0023] The first silicone pad is a square silicone pad, and the cross-section of the first silicone pad is square, or the first silicone pad is a square silicone pad, and the cross-section of the first silicone pad is concave, and the optical engine housing is provided with a first long stop that matches the concave groove of the first silicone pad.

[0024] In a further embodiment of this invention, the optical engine module also includes a water vapor absorption assembly disposed between the FPC circuit board and the optical engine housing, and the water vapor absorption assembly is located on both sides of the DMD module; wherein, the water vapor absorption assembly includes:

[0025] A desiccant layer is disposed inside the optical engine housing;

[0026] The silicone sealant is pressed and disposed on the top surface of the desiccant layer, and is partially housed within the optical engine housing. In a further embodiment of this invention, the optical engine housing is provided with a second mounting groove, and the entire desiccant layer is housed within the second mounting groove.

[0027] The second mounting groove is provided with a support step for supporting the silicone sealant; the height of the desiccant layer is flush with the support step.

[0028] In a further improvement of this invention, the compression silicone has only a few air-permeable grooves.

[0029] In a further embodiment of this invention, the radiator module is provided with a third mounting groove, and the second silicone pad is disposed in the third mounting groove;

[0030] The third mounting slot is a square slot;

[0031] The second silicone pad is a square silicone pad with a square cross-section, or the second silicone pad is a square silicone pad with a concave cross-section, and the heat sink module is provided with a second elongated stop that matches the concave groove of the second silicone pad.

[0032] In a further embodiment of this invention, the first silicone pad and the second silicone pad are arranged opposite each other.

[0033] Secondly, this utility model also provides a projection system, which includes the optical engine module as described above.

[0034] This invention provides an optical engine module and projection system. The optical engine module includes: an optical engine housing with a receiving cavity; a prism assembly disposed within the receiving cavity; a DMD module disposed within the optical engine housing and located on one side of the prism assembly; an FPC circuit board disposed on the optical engine housing and connected to the DMD module; a heat sink module disposed on the optical engine housing and located on one side of the FPC circuit board; a sealant layer disposed between the prism assembly and the optical engine housing; a first silicone pad disposed between the FPC circuit board and the optical engine housing; and a second silicone pad disposed between the FPC circuit board and the heat sink module. This invention, by providing a sealant layer between the prism assembly and the optical engine housing, and by providing silicone pads between the FPC circuit board and the optical engine housing, and between the FPC circuit board and the heat sink module, isolates all gaps in the optical engine module that could allow moisture to seep in, thereby preventing moisture from entering the DMD module and causing DMD failure, and thus improving the service life of the DMD module. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0036] Figure 1This is an exploded view of the optomechanical module in this utility model.

[0037] Figure 2 This is a cross-sectional schematic diagram of the sealing structure of the optomechanical module in this utility model.

[0038] Figure 3 This is an assembly structure diagram of the prism assembly and the optomechanical housing in this utility model.

[0039] Figure 4 This is a schematic diagram of the tooling positioning principle of the prism in this utility model.

[0040] Figure 5 This is a schematic diagram of the assembly of the water vapor absorption component, the first silicone pad, and the optical engine housing in this utility model.

[0041] Figure 6 This is a schematic diagram of the structure of the first silicone pad in one embodiment of the present invention.

[0042] Figure 7 This is a schematic diagram of the assembly of the first silicone pad and the optical engine housing in another embodiment of the present invention.

[0043] Figure 8 This is a schematic diagram of the structure of the first mounting groove, the second mounting groove, and the supporting step in this utility model.

[0044] Figure 9 This is a schematic diagram of the structure of the silicone compression device in one embodiment of the present invention.

[0045] Figure 10 This is a schematic diagram of the desiccant layer in this utility model.

[0046] Figure 11 This is a schematic diagram of the heat sink module in this utility model.

[0047] Figure 12 This is a schematic diagram of the assembly of the first silicone pad, the second silicone pad, and the clamping silicone in this utility model.

[0048] The following are the markings in the attached diagram: 1. Optical engine housing; 11. Accommodating cavity; 12. First mounting slot; 13. First long stop; 14. Second mounting slot; 15. Support step; 2. Prism assembly; 21. Prism; 22. Prism spring; 3. DMD module; 31. DMD chip; 32. Connecting socket; 4. FPC circuit board; 5. Heat sink module; 51. Third mounting slot; 6. Sealing layer; 7. First silicone pad; 8. Second silicone pad; 9. Moisture absorption assembly; 91. Desiccant layer; 92. Pressing silicone; 921. Ventilation groove; 20. First screw; 30. Second screw; 40. Third screw. Detailed Implementation

[0049] This utility model provides an optical engine module and a projection system. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit this utility model.

[0050] In the implementation methods and claims, unless otherwise specified in the text, the terms "a," "an," "the," and "the" may also include plural forms. If the embodiments of this utility model involve descriptions of "first," "second," etc., such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0051] It should be further understood that the term "comprising" as used in this specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when an element is referred to as "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements present. Furthermore, "connected" or "coupled" as used herein can include wireless connections or wireless coupling. The term "and / or" as used herein includes all or any of the units and all combinations thereof of one or more associatedly listed items.

[0052] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0053] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0054] Please also refer to Figures 1 to 12 This utility model provides a preferred embodiment of an optomechanical module.

[0055] In some embodiments, such as Figure 1 and Figure 2As shown, this utility model provides an optical engine module, which includes: an optical engine housing 1, a prism assembly 2, a DMD module 3, an FPC circuit board 4, a heat sink module 5, a sealing layer 6, a first silicone pad 7, and a second silicone pad 8. The optical engine housing 1 has a receiving cavity 11; the prism assembly 2 is disposed within the receiving cavity 11; the DMD module 3 is disposed within the optical engine housing 1 and located on one side of the prism assembly 2; the FPC circuit board 4 is disposed on the optical engine housing 1 and connected to the DMD module 3; the heat sink module 5 is disposed on the optical engine housing 1 and located on one side of the FPC circuit board 4; the sealing layer 6 is disposed between the prism assembly 2 and the optical engine housing 1; the first silicone pad 7 is disposed between the FPC circuit board 4 and the optical engine housing 1; and the second silicone pad 8 is disposed between the FPC circuit board 4 and the heat sink module 5.

[0056] It is important to understand that the aforementioned optical engine module can be used in automotive projection systems. The DMD module 3 is the core component of the optical engine module and has high requirements for its operating environment. For example, in high-temperature and high-humidity environments such as automotive projection systems, it is necessary to consider the risk of moisture intrusion into the DMD module 3, which could lead to its failure, in order to meet various automotive-grade reliability testing requirements.

[0057] In this embodiment, the prism assembly 2, the DMD module 3, the FPC circuit board 4, and the heat sink module 5 are all integrated on the optomechanical housing 1. The optomechanical housing 1 has a receiving cavity 11, in which the DMD module 3 and the prism assembly 2 are both installed. The DMD module 3 is located on one side of the prism assembly 2, and the FPC circuit board 4 is located between the DMD module 3 and the heat sink module 5, and the DMD module 3 and the FPC circuit board 4 are electrically connected. The prism assembly 2 is fixed to the optomechanical housing 1 with a first screw 20, the FPC circuit board 4 is fixed to the optomechanical housing 1 with a second screw 30, and the heat sink module 5 is fixed to the optomechanical housing 1 with a third screw 40. In some embodiments, the first silicone pad 7 and the second silicone pad 8 may be, but are not limited to, vapor phase silicone pads; for example, a milky white vapor phase silicone pad may be used.

[0058] When installing the prism assembly 2, a tiny gap exists between the prism assembly 2 and the optomechanical housing 1. When the optomechanical module is in a high-temperature and high-humidity environment, moisture can penetrate into the DMD module 3 through these tiny gaps, affecting the reliability of the DMD module 3 and reducing its service life. This invention uses sealant to seal the gap between the prism assembly 2 and the optomechanical housing 1, creating a sealant layer 6 between them. This prevents moisture from penetrating the DMD module 3 through the tiny gap between the prism assembly 2 and the optomechanical housing 1. In addition, there are two other paths through which moisture can enter the DMD module 3: the gap between the FPC circuit board 4 and the optical engine housing 1, and the gap between the FPC circuit and the heat sink module 5. This invention seals the gap between the FPC circuit board 4 and the optical engine housing 1, and the gap between the FPC circuit and the heat sink module 5 by installing a first silicone pad 7 between the FPC circuit board 4 and the optical engine housing 1, and by setting a second silicone pad 8 between the FPC circuit board 4 and the heat sink module 5. This isolates all possible paths through which moisture can enter the DMD module 3.

[0059] In the above technical solution, this utility model seals and isolates all gaps in the optical engine module that may allow moisture to seep in by setting a sealing layer 6 between the prism assembly 2 and the optical engine housing 1, and by setting silicone pads between the FPC circuit board 4 and the optical engine housing 1 and between the FPC circuit board 4 and the heat sink module 5. This prevents moisture from entering the DMD module 3 and causing DMD failure, ensuring that the DMD module 3 can work in a high temperature and high humidity environment for a long time, improving the service life of the DMD module 3, and meeting the reliability test requirements of automotive and other application scenarios.

[0060] In some embodiments, such as Figure 3 As shown, a dispensing gap L1 is provided between the prism assembly 2 and the optical engine housing 1; the sealant layer 6 is disposed in the dispensing gap L1 between the prism assembly 2 and the optical engine housing 1.

[0061] In this embodiment, a pre-dip adhesive gap L1 is provided between the prism assembly 2 and the optical engine housing 1. After the prism assembly 2 is installed on the optical engine housing 1, sealant is applied around the perimeter to form a sealant layer 6 between the prism assembly 2 and the optical engine housing 1. The size of the adhesive gap L1 is 0.2-0.5 mm, for example, it can be 0.2 mm, 0.3 mm, or 0.5 mm. In this embodiment, the adhesive gap L1 is 0.3 mm.

[0062] In some embodiments, such as Figures 1 to 3 As shown, the prism assembly 2 includes a prism 21 and a prism spring 22; the prism 21 is disposed in the accommodating cavity 11; the prism spring 22 is disposed on the optical engine housing 1 and abuts against the prism 21; the sealant layer 6 is located in the dispensing gap L1 between the prism 21 and the optical engine housing 1.

[0063] In this embodiment, the prism 21 is assembled with three surfaces of the accommodating cavity 11 of the optomechanical housing 1. Generally, the mounting surfaces of the optomechanical housing 1 and the prism 21 are CNC machined to ensure surface flatness and achieve zero-gap assembly. However, machining errors are inevitable during the machining process, resulting in small gaps between the mating surfaces of the prism 21 and the optomechanical housing 1, which poses a risk of moisture intrusion into the DMD module 3. This invention addresses this by pre-leaving a dispensing gap L1 between the prism 21 and the optomechanical housing 1, and then using a sealing adhesive layer 6 to circumferentially seal the gap between the prism 21 and the optomechanical housing 1.

[0064] When installing the prism 21, please combine Figure 4 The tooling fixture pushes the prism to the 3D theoretical position from both the lens opening C and the DMD module opening B to ensure the correct optical path. After the sealant has cured, the prism 21 is fixed with the prism spring 22, which is fixed to the optical engine housing 1 with screws.

[0065] In some embodiments, such as Figure 3 As shown, to further stabilize the prism 21, additional supports can be installed on both sides of the prism 21. Figure 3 Add UV-curing adhesive to position A in the middle for fixation.

[0066] In some embodiments, such as Figures 5 to 7 As shown, the optical engine housing 1 is provided with a first mounting groove 12 that matches the shape of the first silicone pad 7, and the first silicone pad 7 is disposed in the first mounting groove 12; the first mounting groove 12 is a square groove; the first silicone pad 7 is a square silicone pad, and the cross-section of the first silicone pad 7 is a square cross-section, or the first silicone pad 7 is a square silicone pad, and the cross-section of the first silicone pad 7 is a concave cross-section, and the optical engine housing 1 is provided with a first elongated stop 13 that matches the concave groove of the first silicone pad 7.

[0067] In this embodiment, the first silicone pad 7 is disposed within the first mounting groove 12 of the optical engine housing 1. The first silicone pad 7 may be, but is not limited to, a vapor phase silicone pad. Both sides of the first silicone pad 7 need to be treated with adhesive backing, such as... Figure 6Position D in the middle has a waterproof adhesive, such as 3M adhesive, to prevent volatile substances from entering the DMD module 3.

[0068] The first silicone pad 7 is a square silicone pad, i.e., a U-shaped silicone pad. The first mounting groove 12 is adapted to the shape of the first silicone pad 7 and is a square groove. The first silicone pad 7 is clamped between the FPC circuit board 4 and the optical engine housing 1. The theoretical compression of the first silicone pad 7 is controlled within 0.45mm to avoid insufficient compression that would cause the sealing effect to fail.

[0069] In one implementation, the first silicone pad 7 has a square cross-section, and a portion of the first silicone pad 7 is accommodated in the first mounting groove 12. In another implementation, the first silicone pad 7 has a concave cross-section, that is, the first silicone pad 7 has a concave groove. The optical engine housing 1 is provided with a first elongated stop 13 adapted to the concave groove. After the first silicone pad 7 is accommodated in the first mounting groove 12, the first elongated stop 13 is inserted into the concave groove of the first silicone pad 7, which can further improve the sealing effect, such as... Figure 7 As shown.

[0070] In some embodiments, such as Figure 1 , Figure 2 and Figure 12 As shown, the optical engine module also includes a water vapor absorption component 9 disposed between the FPC circuit board 4 and the optical engine housing 1, and the water vapor absorption component 9 is located on both sides of the DMD module 3; wherein, the water vapor absorption component 9 includes: a desiccant layer 91 disposed in the optical engine housing 1; and a pressing silicone 92 disposed on the top surface of the desiccant layer 91 and partially housed in the optical engine housing 1.

[0071] In this embodiment, to further protect the DMD module 3 and prevent moisture from entering its interior, two sets of moisture absorption components 9 are also provided on the optical engine housing 1 inside the first silicone pad 7. These moisture absorption components 9 are located on both sides of the DMD module 3. Each moisture absorption component 9 consists of a desiccant layer 91 and a pressing silicone pad 92. The desiccant layer 91 is located within the optical engine housing 1 and can absorb intruding moisture. The pressing silicone pad 92 is located between the desiccant layer 91 and the FPC circuit board 4, and it serves to fix the desiccant layer 91. In one implementation, the desiccant used in the desiccant layer 91 can be montmorillonite desiccant with a particle size of 1 mm. It exhibits minimal volume expansion after moisture absorption and high stability. Figure 10 As shown. In some other implementations, the desiccant layer 91 may also employ molecular sieve particles with a diameter of 1 mm for moisture absorption.

[0072] In some embodiments, such as Figure 5 and Figure 8 As shown, the optical engine housing 1 is provided with a second mounting groove 14, and the entire desiccant layer 91 is housed within the second mounting groove 14; a support step 15 for supporting the compression silicone 92 is provided within the second mounting groove 14; the height of the desiccant layer 91 is flush with the support step 15.

[0073] In this embodiment, the optical engine housing 1 is provided with a second mounting groove 14 for accommodating the desiccant layer 91, and the second mounting groove 14 is located inside the first silicone pad 7. While ensuring the strength of the optical engine housing 1, the second mounting groove 14 is designed to be as large as possible to accommodate more desiccant. Supporting steps 15 are provided on at least two sides of the second mounting groove 14. The supporting steps 15 are used to support and install the clamping silicone pad 92, preventing the clamping silicone pad 92 from being improperly fixed. Generally, the desiccant layer 91 is flush with the height of the supporting steps 15 to maximize the placement of desiccant.

[0074] In some embodiments, such as Figure 9 As shown, the silicone rubber 92 has only a few ventilation grooves 921, which allow the desiccant at the bottom of the silicone rubber 92 to more easily absorb moisture. The diameter of the ventilation grooves 921 is 0.3-0.8 mm, for example, 0.3 mm, 0.5 mm, or 0.8 mm. In this embodiment, the diameter of the ventilation grooves 921 is 0.5 mm.

[0075] In some embodiments, such as Figure 11 As shown, the heat sink module 5 is provided with a third mounting groove 51, and the second silicone pad 8 is disposed in the third mounting groove 51; the third mounting groove 51 is a square groove; the second silicone pad 8 is a square silicone pad, and the cross-section of the second silicone pad 8 is a square cross-section, or the second silicone pad 8 is a square silicone pad, and the cross-section of the second silicone pad 8 is a concave cross-section, and the heat sink module 5 is provided with a second elongated stop that matches the concave groove of the second silicone pad 8.

[0076] In this embodiment, the second silicone pad 8 is disposed in the third mounting groove 51 of the heat sink module 5. The second silicone pad 8 may be, but is not limited to, a vapor phase silicone pad. Both sides of the second silicone pad 8 need to be treated with adhesive backing. The adhesive backing has waterproof properties, such as 3M adhesive, to prevent volatile substances from entering the DMD module 3.

[0077] The second silicone pad 8 is a square silicone pad, i.e., a U-shaped silicone pad. The third mounting groove 51 is adapted to the shape of the second silicone pad 8 and is a square groove. The second silicone pad 8 is clamped between the FPC circuit board 4 and the heat sink module 5. The theoretical compression of the second silicone pad 8 is controlled within 0.50mm to avoid insufficient compression that would cause the sealing effect to fail.

[0078] In one implementation, the second silicone pad 8 has a square cross-section, and a portion of the second silicone pad 8 is accommodated in the third mounting groove 51. In another implementation, the second silicone pad 8 has a concave cross-section, that is, the second silicone pad 8 has a concave groove. The heat sink module 5 is provided with a second elongated stop that matches the concave groove. After the second silicone pad 8 is accommodated in the third mounting groove 51, the second elongated stop is inserted into the concave groove of the second silicone pad 8, which can further improve the sealing effect.

[0079] In some embodiments, such as Figure 12 As shown, the first silicone pad 7 and the second silicone pad 8 are arranged opposite each other.

[0080] In this embodiment, the DMD module 3 includes a DMD chip 31 and a connection socket 32. The DMD chip 31 is electrically connected to the FPC circuit board 4 through the connection socket 32. As the core component of the optomechanical module, the DMD chip 31 is composed of millions of micromirror arrays and cannot be directly subjected to force. It typically requires the installation of the clamping silicone 92 before the FPC circuit board 4 presses down on the DMD chip 31. If additional silicone is added while the DMD module 3 is being secured by the clamping silicone 92, it may cause excessive force and damage to the DMD module 3. Therefore, the positions of the first silicone pad 7 and the second silicone pad 8 need to coincide so that the supporting force of the first silicone pad 7 can offset the pressure exerted on the DMD module 3 by the second silicone pad 8.

[0081] In some embodiments, the present invention also provides a projection system including the optical engine module as described above. Specific embodiments of the optical engine module are described herein and will not be repeated here.

[0082] In summary, the optical engine module and projection system provided by this utility model have the following advantages:

[0083] Beneficial effects:

[0084] Considering all possible gaps where moisture could seep in (the gap between the heat sink module and the FPC circuit board, the gap between the optical engine housing and the FPC circuit board, and the gap between the prism and the optical engine housing), this invention uses a combination of sealant and vapor-phase silicone gaskets to isolate these pathways. Simultaneously, a desiccant is added to the optical engine housing to further protect the DMD module and prevent moisture from penetrating the DMD chip. Unlike traditional methods that only use vapor-phase silicone gaskets for sealing, this invention ensures the reliability of the DMD module during long-term operation in high-temperature and high-humidity environments, reduces the risk of DMD module failure, and meets the reliability testing requirements for automotive applications.

[0085] It should be understood that the application of this utility model is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An optical engine module, characterized by comprising: include: Optical engine housing, with accommodating cavity; The prism assembly is disposed within the accommodating cavity; The DMD module is disposed inside the optical engine housing and located on one side of the prism assembly; An FPC circuit board is mounted on the optomechanical housing and connected to the DMD module; A heat sink module is mounted on the optical engine housing and located on one side of the FPC circuit board; A sealant layer is disposed between the prism assembly and the optomechanical housing; A first silicone pad is disposed between the FPC circuit board and the optomechanical housing; A second silicone pad is disposed between the FPC circuit board and the heat sink module.

2. The optical engine module of claim 1, wherein, A dispensing gap is provided between the prism assembly and the optomechanical housing; the sealant layer is disposed in the dispensing gap between the prism assembly and the optomechanical housing.

3. The optical engine module of claim 1, wherein, The prism assembly includes a prism and a prism spring; The prism is disposed in the accommodating cavity; The prism spring is disposed on the optical engine housing and abuts against the prism; The sealant layer is located in the dispensing gap between the prism and the optical engine housing.

4. The optical engine module of claim 1, wherein, The optical engine housing is provided with a first mounting groove that is adapted to the shape of the first silicone pad, and the first silicone pad is disposed in the first mounting groove. The first mounting slot is a square slot; The first silicone pad is a square silicone pad, and the cross-section of the first silicone pad is square, or the first silicone pad is a square silicone pad, and the cross-section of the first silicone pad is concave, and the optical engine housing is provided with a first long stop that matches the concave groove of the first silicone pad.

5. The optical engine module of claim 1, wherein, It also includes a water vapor absorption assembly disposed between the FPC circuit board and the optomechanical housing, and the water vapor absorption assembly is located on both sides of the DMD module; wherein, the water vapor absorption assembly includes: A desiccant layer is disposed inside the optical engine housing; The silicone sealant is pressed and disposed on the top surface of the desiccant layer and partially housed within the optical engine housing.

6. The optical engine module of claim 5, wherein, The optical engine housing is provided with a second mounting groove, and the entire desiccant layer is contained within the second mounting groove; The second mounting groove is provided with a support step for supporting the silicone sealant; the height of the desiccant layer is flush with the support step.

7. The optical engine module according to claim 5 or 6, characterized by The compression silicone has only a few ventilation grooves.

8. The optical engine module of claim 1, wherein, The heat sink module is provided with a third mounting slot, and the second silicone pad is disposed in the third mounting slot. The third mounting slot is a square slot; The second silicone pad is a square silicone pad with a square cross-section, or the second silicone pad is a square silicone pad with a concave cross-section, and the heat sink module is provided with a second elongated stop that matches the concave groove of the second silicone pad.

9. The optical engine module of claim 1, wherein, The first silicone pad and the second silicone pad are arranged opposite each other as shown.

10. A projection system, characterized by, Includes the optical engine module as described in any one of claims 1-9.

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