Opto-mechanical assembly and projector

Abstract

This application provides an optical engine assembly and a projector. The optical engine assembly includes: an optical engine for generating and projecting images; a housing for housing the optical engine; a heat sink, which forms a sealed space with the housing, in which the optical engine is disposed; and heat dissipation holes provided by the heat sink; and a baffle, which is slidably connected to the heat sink and corresponding to the heat dissipation holes. Driven by electricity, the baffle can move to a first position to block the heat dissipation holes when the optical engine stops working, or to a second position to expose the heat dissipation holes when the optical engine starts working. By setting a movable baffle at the heat dissipation hole position, and relating it to the optical engine's operating state, the heat dissipation holes can be exposed for heat dissipation when the optical engine is working, and can be blocked to prevent dust when the optical engine stops working. This achieves both heat dissipation and dust prevention for the optical engine, automatically realizing dust prevention and heat dissipation, extending the service life of the optical engine assembly, and improving the user experience.

Description

Technical Field

[0001] This application belongs to the field of projector technology, and in particular relates to an optical engine component and a projector. Background Technology

[0002] Current single LCD (Liquid Crystal Display) projectors are divided into closed-loop optical engines and open-loop optical engines. Closed-loop optical engines have good dust protection capabilities, but the closed environment may lead to heat accumulation. If the heat dissipation design is insufficient, it may affect the lifespan of the chip or cause automatic brightness reduction. Open-loop or semi-open-loop optical engines expose the optical path and chip to the air, but dust can easily enter the optical path, causing black spots on the screen, reduced brightness, and affecting the lifespan of the optical engine. Utility Model Content

[0003] This application provides an optical engine component and a projector that can balance heat dissipation of the optical engine and reduce dust ingress, thereby improving the service life of the optical engine component.

[0004] In a first aspect, embodiments of this application provide an optomechanical component, including:

[0005] Optical engines are used to generate and project images;

[0006] Housing for accommodating the optical engine;

[0007] A heat sink, which together with the housing forms a sealed space, and the optical engine is disposed within the sealed space. The heat sink is provided with heat dissipation holes.

[0008] A baffle is slidably connected to the heat sink and is provided corresponding to the heat dissipation hole. When the optical engine stops working, the baffle can move to a first position to block the heat dissipation hole, or move to a second position to expose the heat dissipation hole when the optical engine starts working.

[0009] Optionally, the radiator includes multiple heat dissipation grilles, with an air guide channel between each pair of adjacent heat dissipation grilles and communicating with the heat dissipation holes.

[0010] Optionally, the radiator includes a bottom wall, a first side wall, and a second side wall connected in sequence, wherein the first side wall is inclined relative to the bottom wall and the second side wall, respectively.

[0011] Optionally, the optical engine assembly further includes a fan mounted on the housing and oriented toward the optical engine.

[0012] Optionally, the optical engine assembly further includes a dust filter, which is disposed on the side of the fan away from the optical engine.

[0013] Optionally, the fan is connected to the side of the housing facing the optical engine, and the dust filter is connected to the side of the housing away from the optical engine.

[0014] Optionally, the optical engine includes a projection lens, which is mounted on the housing, and the projection lens and the fan are disposed on the same side plate of the housing.

[0015] Optionally, the housing includes a first side plate, a top plate, and a second side plate connected in sequence. The first side plate is bent and connected to the bottom wall, and the second side plate is bent and connected to the second side wall. The second side plate is inclined relative to both the first side plate and the top plate. The projection lens is disposed on the first side plate.

[0016] The optical engine also includes a light source and a reflector. The light source is disposed on the bottom wall, and the reflector is disposed along the second side plate. The light emitted by the light source can be reflected by the reflector into the projection lens.

[0017] Optionally, the heat sink is provided with a guide rail; the optomechanical assembly also includes a motor, the motor is electrically connected to the guide rail and can move along the guide rail, the baffle is fixed to the motor, and the motor is used to receive the power-on signal and power-off signal of the optomechanical assembly to start it.

[0018] Secondly, embodiments of this application also provide a projector, including a housing and an optical engine assembly as described in any of the preceding claims, the optical engine assembly being disposed within the housing.

[0019] In the optical engine assembly and projector of this application embodiment, by setting a movable baffle at the heat dissipation hole position and associating it with the optical engine's working state, the heat dissipation hole can be exposed to dissipate heat from the optical engine when it is working, and the heat dissipation hole can be blocked to prevent dust when the optical engine stops working. This takes into account both heat dissipation and dust prevention of the optical engine, and can automatically achieve dust prevention and heat dissipation, which can extend the service life of the optical engine assembly and improve the user experience. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0022] Figure 1This is a schematic diagram of the structure of an optomechanical component provided in an embodiment of this application.

[0023] Figure 2 This is another structural schematic diagram of the optomechanical component provided in the embodiments of this application.

[0024] Figure 3 A side view of a heat sink provided in an embodiment of this application.

[0025] Figure 4 A top view of a heat sink provided in an embodiment of this application.

[0026] Figure 5 A front view of a heat sink provided in an embodiment of this application.

[0027] Figure 6 This is another structural schematic diagram of the optomechanical component provided in the embodiments of this application.

[0028] Figure 7 This is a schematic diagram of the structure of the baffle in the first position of the optomechanical assembly provided in the embodiment of this application.

[0029] Figure 8 This is a schematic diagram of the structure of the baffle in the second position of the optomechanical assembly provided in the embodiment of this application. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] In order to balance heat dissipation of the optical engine and reduce dust ingress, this application provides an optical engine component and a projector, which will be described below with reference to the accompanying drawings.

[0032] For example, please refer to Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of an optomechanical assembly provided in an embodiment of this application. The optomechanical assembly 100 in this embodiment includes an optomechanical unit 110, a housing 120, a heat sink 130, and a baffle 140.

[0033] The optical engine 110 is used to generate and project images. In a projector, the optical engine 110 is also known as the optical motor and is one of the core components. The performance of the optical engine 110 directly affects the quality of the projected image, including brightness, contrast, color saturation, and sharpness. The main components of the optical engine 110 include a light source, a color wheel or color prism, a DMD chip, a lens system, filters, and a control system.

[0034] The housing 120 is used to house the optical engine 110, wherein some components in the optical engine 110 can also be embedded or mounted on the housing 120.

[0035] The heat sink 130 and the housing 120 enclose a sealed space 122, within which the optical engine 110 is housed. The heat sink 130 has heat dissipation holes 131. Multiple heat dissipation holes 131 can be provided to increase the heat dissipation area and thus improve heat dissipation efficiency. The heat sink 130 is primarily used to dissipate heat from components within the optical engine 110, such as the light source.

[0036] The baffle 140 is slidably connected to the heat sink 130 and is set with a corresponding heat dissipation hole 131. When the optical engine 110 stops working, the baffle 140 can move to a first position to block the heat dissipation hole 131, or move to a second position to expose the heat dissipation hole 131 when the optical engine 110 starts working.

[0037] It is understandable that the baffle 140 is electrically driven, and whether the baffle 140 blocks the heat dissipation hole 131 can be linked to the working state of the optical engine 110, thereby enabling automatic heat dissipation of the optical engine 110 in the working state and automatic dust prevention of the optical engine 110 in the non-working state.

[0038] In the optomechanical assembly 100 provided in this application embodiment, a movable baffle 140 is set at the heat dissipation hole 131 and is associated with the working state of the optomechanical 110. When the optomechanical 110 is working, the heat dissipation hole can be exposed to dissipate heat from the optomechanical 110, and when the optomechanical 110 stops working, the heat dissipation hole 131 can be blocked to prevent dust. This takes into account both heat dissipation and dust prevention of the optomechanical 110, and can automatically achieve dust prevention and heat dissipation, which can extend the service life of the optomechanical assembly 100 and improve the user experience.

[0039] The heat sink 130 is equipped with a guide rail. The optomechanical assembly 100 also includes a motor, which is electrically connected to the guide rail and can move along the guide rail. A baffle 140 is fixed to the motor, which is used to receive power-on and power-off signals from the optomechanical assembly 110 to start. That is, the baffle 140 can reciprocate along the guide rail to switch between a first position and a second position, and the switching position of the baffle 140 is related to the operating state of the optomechanical assembly 110.

[0040] For the heatsink 130, cooling can also be achieved in conjunction with a fan.

[0041] For example, please refer to Figure 2 As shown, Figure 2This is another structural schematic diagram of the optomechanical assembly provided in the embodiments of this application. The optomechanical assembly 100 also includes a fan 150, which is mounted on the housing 120 and is disposed toward the optomechanical 110. The fan 150 is used to blow air toward the optomechanical 110 when the optomechanical 110 is working, so as to accelerate the dissipation of heat generated in the optomechanical 110.

[0042] To reduce the risk of dust entering the optical engine 110 from the fan 150, the optical engine assembly 100 of this application embodiment also includes a dust filter 160, which is disposed on the side of the fan 150 away from the optical engine 110.

[0043] For example, during installation, the fan 150 is connected to the side of the housing 120 facing the optical engine 110, and the dust filter 160 is connected to the side of the housing 120 away from the optical engine 110. Furthermore, the housing 120 can be provided with mounting holes at this location, allowing either a portion of the fan 150 or the dust filter 160 to be installed within the mounting holes, thereby maximizing space utilization and improving space efficiency.

[0044] To improve the dustproof effect of the dust filter 160, double or multiple layers of dust filter can be set. The mesh diameter of the dust filter closer to the fan 150 can be set smaller than that of the dust filter farther away from the fan 150, thereby achieving multiple dust filtration effects and improving the dustproof effect.

[0045] Since the fan 150 accelerates the air flow speed of the optical engine 110, if the airflow of this part is not guided, the heat dissipation speed and heat dissipation effect will be reduced. Based on this, the heat sink 130 of this application embodiment includes a plurality of heat dissipation grilles 132, and an air guide channel 133 is provided between each two adjacent heat dissipation grilles 132. The air guide channel 133 is connected to the heat dissipation hole 131, which can help guide hot air out of the heat dissipation hole 131.

[0046] The radiator 130 can be made of a material with low thermal conductivity, such as aluminum, copper, or aluminum alloys. The airflow channel 133 formed by the heat dissipation grille 132 can also be called a heat dissipation trench, which serves to dissipate heat and guide airflow.

[0047] Furthermore, the structure of the heat sink 130 has been improved to accommodate the components in the optical engine 110. For example, please refer to... Figure 2 And see Figures 3 to 5 As shown, Figure 3 This is a side view of the heat sink provided in an embodiment of this application. Figure 4 This is a top view of the heat sink provided in an embodiment of this application. Figure 5This is a front view of a heat sink provided in an embodiment of this application. The heat sink 130 includes a bottom wall 134, a first side wall 135, and a second side wall 136 connected in sequence. The first side wall 135 is inclined relative to the bottom wall 134 and the second side wall 136, thereby adapting to the configuration of an optical engine 110, such as a condenser cup. The bottom wall 134, the first side wall 135, and the second side wall 136 each have a predetermined thickness. The heat dissipation grille 132 is embedded in the bottom wall 134, the first side wall 135, and the second side wall 136, and is modified accordingly.

[0048] The structure of the housing 120 also needs to be adapted to the optical engine 110 in order to improve space utilization and reduce material consumption.

[0049] For example, the housing 120 includes a first side plate 123, a top plate 124, and a second side plate 125 connected in sequence. The first side plate 123 is bent and connected to the bottom wall 134, for example, it can be connected perpendicularly, and the first side plate 123 covers the thickness direction of the bottom wall 134 to facilitate the connection between the two. The top plate 124 is perpendicularly connected to the first side plate 123, and the top plate 124 is disposed opposite to the bottom wall 134, but the length of the top plate 124 can be less than the length of the bottom wall 134. The second side plate 125 is bent and connected to the second side wall 136, or in other words, the second side plate 125 is inclined relative to both the first side plate 123 and the top plate 124 to accommodate the arrangement of the reflector and projection lens in the optical engine 110.

[0050] For example, please refer to Figure 6 As shown, Figure 6 This is another schematic diagram of the optical engine assembly provided in the embodiments of this application. The optical engine 110 includes a projection lens 111, which is mounted on the housing 120 and can be disposed on the first side plate 123 along with the fan 150. Since there is sufficient mounting space on the first side plate 123, disposing of both the projection lens 111 and the fan 150 on the first side plate 123 can facilitate projection and improve integration.

[0051] The optical engine 110 also includes a light source 112 and a reflector 113. The light source 112 is disposed on the bottom wall 134 of the heat sink 130, and the reflector 113 is disposed along the second side plate 125. The light emitted by the light source 112 can be reflected along the reflector 113 onto the projection lens 111.

[0052] Of course, the optical engine 110 also includes a condenser cup covered on the light source 112, a light-collecting lens disposed on the condenser cup, a heat-insulating lens disposed on the light-collecting lens, a liquid crystal display screen and a condenser lens, etc., which will not be described in detail here.

[0053] Please combine Figures 1 to 6 And see Figure 7 and Figure 8 As shown, Figure 7 This is a schematic diagram of the structure of the baffle in the first position of the optomechanical assembly provided in the embodiment of this application. Figure 8 This is a schematic diagram of the structure of the baffle in the second position of the optical engine assembly provided in this application embodiment. The optical engine assembly 100 of this application embodiment is a semi-open optical engine. Through the design of the heat sink 130 and the automatic motor cooperating with the power-on and power-off states to open and close the air outlet baffle 140, atmospheric dust is isolated, while achieving the heat dissipation effect of an open optical engine. In the power-off state, the motor controls the baffle 140 to close the heat dissipation hole 131, achieving a sealing effect, while the air inlet of the fan 150 is equipped with a dust filter 160 to isolate atmospheric dust; when powered on, the motor receives the power-on signal, opens the baffle 140 at the heat dissipation hole 131, and at the same time, the cooling fan 150 starts. The outside air enters the optical engine 110 through the air inlet, is filtered by the dust filter 160, and blows air to dissipate heat from the liquid crystal display and heat insulation glass. The airflow is guided through the fin grooves of the heat sink 130 to the heat dissipation hole 131. When the machine is turned off, the motor receives the shutdown signal and activates the baffle 140 at the heat dissipation hole 131 to close the heat dissipation hole 131. The fan 150 stops blowing air to prevent external dust from entering.

[0054] This application also provides a projector, which includes a housing and an optical engine assembly. The optical engine assembly is disposed inside the housing, and the housing has heat dissipation openings corresponding to the heat dissipation holes of the optical engine assembly to dissipate the heat generated in the optical engine to the outside of the projector. The structure of the optical engine assembly can refer to the above embodiments, and will not be repeated here. Since this projector adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be repeated here.

[0055] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0056] In the description of this application, 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 technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0057] The optical engine components and projectors provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An optomechanical component, characterized in that, include: Optical engines are used to generate and project images; Housing for accommodating the optical engine; A heat sink, which together with the housing forms a sealed space, and the optical engine is disposed within the sealed space. The heat sink is provided with heat dissipation holes. A baffle is slidably connected to the heat sink and is provided corresponding to the heat dissipation hole. When the optical engine stops working, the baffle can move to a first position to block the heat dissipation hole, or move to a second position to expose the heat dissipation hole when the optical engine starts working.

2. The optomechanical assembly according to claim 1, characterized in that, The radiator includes multiple heat dissipation grilles, and an air guide channel is provided between each two adjacent heat dissipation grilles and communicates with the heat dissipation holes.

3. The optomechanical assembly according to claim 2, characterized in that, The radiator includes a bottom wall, a first side wall, and a second side wall connected in sequence, with the first side wall being inclined relative to the bottom wall and the second side wall, respectively.

4. The optomechanical assembly according to claim 3, characterized in that, The optical engine assembly also includes a fan, which is mounted on the housing and oriented toward the optical engine.

5. The optomechanical assembly according to claim 4, characterized in that, The optical engine assembly also includes a dust filter, which is disposed on the side of the fan away from the optical engine.

6. The optomechanical assembly according to claim 5, characterized in that, The fan is connected to the side of the housing facing the optical engine, and the dust filter is connected to the side of the housing away from the optical engine.

7. The optomechanical assembly according to claim 4, characterized in that, The optical engine includes a projection lens, which is mounted on the housing, and the projection lens and the fan are disposed on the same side plate of the housing.

8. The optomechanical assembly according to claim 7, characterized in that, The housing includes a first side plate, a top plate, and a second side plate connected in sequence. The first side plate is bent and connected to the bottom wall, and the second side plate is bent and connected to the second side wall. The second side plate is inclined relative to both the first side plate and the top plate. The projection lens is disposed on the first side plate. The optical engine also includes a light source and a reflector. The light source is disposed on the bottom wall, and the reflector is disposed along the second side plate. The light emitted by the light source can be reflected by the reflector into the projection lens.

9. The optomechanical assembly according to claim 1, characterized in that, The heat sink is provided with a guide rail; the optomechanical assembly also includes a motor, which is electrically connected to the guide rail and can move along the guide rail. The baffle is fixed to the motor, and the motor is used to receive the power-on signal and power-off signal of the optomechanical assembly to start it.

10. A projector, characterized in that, It includes a housing and an optomechanical assembly as described in any one of claims 1 to 9, the optomechanical assembly being disposed within the housing.

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