High-efficiency heat-dissipation projector light machine and projector

Abstract

The application relates to a high-efficiency heat-dissipation projector light machine and a projector. A fan is arranged on one side of a lamp panel in a light machine shell, a heat-dissipation assembly with a heat-dissipation piece is arranged on the other side, and a directional fluid channel is formed between the fan and the heat-dissipation assembly. Air flow generated by the operation of the fan directly blows to the lamp panel, and accumulated heat is introduced into the fluid channel, and then guided and impacted on the heat-dissipation piece to be efficiently dissipated. Heat-dissipation wings are arranged on the two sides of the heat-dissipation piece to increase the heat-dissipation area, and the heat-dissipation wings are fixed through a bearing plate. Hollow cavities on the bearing plate help to guide out heat of the shell. The heat-dissipation path cooperates with heat-dissipation grooves arranged in front of and behind the projector shell to form a complete air duct. A motor driving gear drives a lens rotating sleeve to realize accurate adjustment of the position of the lens, is used for picture zooming and correction, and a limiting structure is used to ensure stable rotation. By constructing a system combining forced directional air cooling and large-area heat dissipation, the heat dissipation efficiency is remarkably improved, and the heat dissipation problem of a compact projector under long-term high-load operation is solved.

Description

Technical Field

[0001] This application relates to the field of projector optical engines and projectors, and more particularly to a projector optical engine and projector with high-efficiency heat dissipation. Background Technology

[0002] As the core component of a projector, the optical engine generates a significant amount of heat during operation, particularly from its internal light source module (such as an LED lamp board) and optical lenses. If this heat cannot be dissipated effectively and promptly, the internal temperature of the optical engine will rise, affecting not only the performance and lifespan of the optical components but also potentially causing problems such as image color distortion, brightness decay, and unstable equipment operation. In severe cases, this can even lead to equipment damage.

[0003] Currently, most common projector optical engine cooling methods employ a single fan combined with a heatsink for air cooling. This single cooling path results in limited efficiency, especially in miniaturized, high-brightness projection devices where insufficient heat dissipation is even more pronounced. Furthermore, traditional cooling structures often fail to create effective airflow channels, causing hot air to accumulate inside the optical engine, further exacerbating the cooling challenge.

[0004] Therefore, designing a heat dissipation solution that is structurally sound, highly efficient, and suitable for compact optical engines has become a pressing technical problem in this field. Utility Model Content

[0005] The technical problem to be solved by this application is to overcome the defects of the single heat dissipation path and low efficiency in the prior art, and to provide a projector optical engine and projector that are compact, have high heat dissipation efficiency and stable operation.

[0006] To solve the above-mentioned technical problems, the technical solution adopted in this application is:

[0007] A high-efficiency heat dissipation projector optical engine is constructed, comprising an optical engine housing, and a lens assembly, a lamp board, and a lens disposed within the optical engine housing. The lamp board is located at the bottom of the optical engine housing, the lens is located at the top of the optical engine housing, the lens assembly is disposed in the optical path between the lamp board and the lens, and includes a reflective lens for changing the direction of the optical path, a fan is disposed on the optical engine housing, one side of the lamp board faces the fan, and a heat dissipation assembly is disposed on the other side, a fluid channel is formed between the lamp board and the heat dissipation assembly, and a heat sink of the heat dissipation assembly is disposed at the end of the fluid channel; the fan is configured to blow airflow through the fluid channel and guide it to the heat sink.

[0008] Preferably, the heat sink has multiple heat dissipation wings on both sides, and heat dissipation gaps are formed between the heat dissipation wings.

[0009] Preferably, the heat dissipation assembly further includes a receiving plate, and the heat dissipation component is mounted on the receiving plate via a fixing plate. The receiving plate is provided with a hollow cavity that contacts the optical engine housing.

[0010] Preferably, the inner wall of the fluid channel is an inclined surface, which is used to guide and accelerate the airflow to the heat sink.

[0011] Preferably, a motor is provided on the optical engine housing, the output end of the motor is connected to a drive gear, a rotating sleeve is fitted on the outside of the lens, and the outer periphery of the side wall of the rotating sleeve is provided with a retaining tooth that meshes with the drive gear.

[0012] Preferably, the rotating sleeve has an outer flange on its side, and the optical engine housing has a limiting clamp with a clamping part for accommodating the outer flange and restricting its axial movement.

[0013] Preferably, the lens assembly includes a reflective lens disposed in the optical path, and the optical engine housing is provided with an inclined reflective lens fixing position for mounting the reflective lens to change the direction of optical path propagation.

[0014] Preferably, the line connecting the lamp plate and the lens is inclined, and multiple sets of lens slots for mounting lenses are provided above the lamp plate inside the optical engine housing. The lamp plate and some lenses are located on the incident light path side of the reflective lens, and the lens is located on the outgoing light path side of the reflective lens.

[0015] A projector is constructed, comprising a housing, characterized in that: a projector optical engine with high heat dissipation as described above is disposed inside the housing, a power interface and a USB interface are disposed on the housing, and feet are disposed on the bottom of the housing.

[0016] Preferably, the outer shell includes a front shell and a rear cover. The front shell is provided with a heat dissipation groove corresponding to the heat dissipation component, and the rear cover is provided with a heat dissipation groove. A fixing wing is provided inside the front shell to fix the optical engine inside the outer shell.

[0017] The beneficial effects of this application are as follows: Significantly improved heat dissipation efficiency. By setting up a fluid channel between the fan and the heat dissipation component, and in conjunction with the heat dissipation fin structure on the heat dissipation component, an efficient airflow guidance and heat dissipation path is formed, effectively accelerating the exhaust of hot air and preventing heat accumulation inside the optical engine. The structure is compact and reasonable. The lamp board, lens assembly, and heat dissipation component inside the optical engine are spatially optimized. The heat dissipation component is located on the leeward side of the lamp board, and the fan drives airflow through the fluid channel to directly act on the heat dissipation component, achieving an optimal balance between heat dissipation and space utilization. The heat dissipation component is scientifically designed, employing a double-sided heat dissipation fin design, increasing the heat dissipation area and enhancing the air convection effect; the hollow cavity structure on the support plate further improves the heat dissipation efficiency of the optical engine casing. Good overall heat dissipation synergy. Heat dissipation slots are provided at both the front and rear of the projector casing, forming a through-ventilation channel with the internal heat dissipation structure of the optical engine, further improving the overall heat dissipation performance and ensuring long-term stable operation of the equipment. Stable installation and high reliability. The optical engine is securely installed inside the casing by fixing fins, avoiding structural loosening caused by vibration or temperature changes. At the same time, the stepped and fixing plate design of the heat dissipation component also enhances the assembly stability of the component. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the present application will be further described below in conjunction with the accompanying drawings and embodiments. The 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.

[0019] Figure 1 This is a schematic diagram of the axial side structure of the projector according to a preferred embodiment of this application;

[0020] Figure 2 This is a schematic diagram of another axial side structure of the projector according to a preferred embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the axial structure of the front shell according to a preferred embodiment of this application;

[0022] Figure 4 This is a schematic diagram of the axial structure of the optical engine according to a preferred embodiment of this application;

[0023] Figure 5 This is a schematic diagram of another axial side structure of the optical engine according to a preferred embodiment of this application;

[0024] Figure 6 This is a front view of the optical engine according to a preferred embodiment of this application.

[0025] Figure 7 This is a preferred embodiment of the present application. Figure 6 A schematic diagram of the cross-sectional structure of the optical engine along the AA direction;

[0026] Figure 8 This is a partial axial side view of the optical engine housing according to a preferred embodiment of this application;

[0027] Figure 9 This is an exploded view of the heat dissipation assembly according to a preferred embodiment of this application;

[0028] Figure 10 This is a schematic diagram of the assembly structure of the lens, motor, rotating sleeve and limiting clamp according to a preferred embodiment of this application. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this application. Obviously, the described embodiments are some embodiments of this application, but not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application.

[0030] A preferred embodiment of this application provides a high-efficiency heat dissipation projector optical engine and projector; such as Figures 1-3 As shown, the system includes an outer casing, which consists of a front shell 10 and a rear cover 11. An optical engine 2 is housed inside the front shell, and a fixing fin 16 is provided corresponding to the optical engine within the front shell. The fixing fin secures the optical engine 2 within the front shell, effectively preventing it from shaking during operation. The rear cover has a power interface 13 for connecting to a power source to power the projector. It also has a USB port 14 for inputting projection signals to the projector for projection. Multiple feet 12 are provided at the bottom of the front shell to ensure stable placement of the projector and prevent the bottom of the projector from contacting the placement surface. To improve the heat dissipation efficiency of the optical engine, both the front shell 10 and the rear cover 11 have heat dissipation grooves 15, forming air convection channels that allow the heat generated during operation to flow away.

[0031] Specifically, such as Figures 4-7 As shown, the optical engine 2 includes an optical engine housing 24, a lens assembly 25 housed within the housing, and a lamp board 22 and a lens 26 corresponding to the lens assembly. A fan control board 20 is located above the optical engine housing, controlling the overall operation of the optical engine. The connection between the lamp board and the lens is angled; therefore, a set of reflective lenses is required in the lens assembly 25. The light emitted from the lamp board passes through a portion of the lens module and then through the reflective lenses, changing the direction of optical fiber propagation to the lens. This significantly shortens the physical distance between the lens and the lamp board while ensuring the necessary optical path length, achieving miniaturization of the optical engine structure. The optical engine's operation is as follows: LED beads on the lamp board 22 are powered on and emit light. The light first passes through the LED bead hole 240 (see...). Figure 8The light enters a lens module composed of multiple lenses for integration and correction; then, the light shines onto a tilted reflector, and the light path is deflected by 90 degrees; finally, the corrected light beam enters the lens 26 perpendicularly, and the lens projects the image. The specific method of playing the projected image after passing through the lens module and lens can be achieved using existing technology. This application does not specifically describe the structure of the lens module and lens, nor is it within the scope of protection of this application. The lamp board 22 is controlled by a lamp board control board, and a fan 21 is provided on the optical engine housing corresponding to the lamp board. The fan is controlled by a fan control board 210, and the heat generated by the lamp beads during operation is blown away by the fan, thereby extending the lifespan of the lamp board. Simultaneously, a heat dissipation assembly 23 is connected to the optical engine housing. The heat dissipation assembly 23 is positioned on the side of the lamp panel 22 away from the fan. Therefore, in the horizontal direction, the lamp panel is positioned between the fan and the heat dissipation assembly. A fluid channel 27 is provided between the heat dissipation assembly and the lamp panel. The fan blows the heat generated during the operation of the lamp panel into the fluid channel. A fluid outlet 270 is provided at the end of the fluid channel, and the heat sink 231 of the heat dissipation assembly is located at the fluid outlet 270. The hot air in the fluid channel is blown to the heat sink through the fluid outlet and dissipated by the heat sink, preventing the accumulation of hot air.

[0032] Furthermore, such as Figure 7 and Figure 9 As shown, heat dissipation fins 234 are provided on both sides of the heat dissipation component 231, forming a heat dissipation gap 235 between the heat dissipation fins, thereby further improving the heat dissipation effect. The heat dissipation assembly 23 also includes a receiving plate 230, through which the heat dissipation component is installed. A fixing plate 232 is provided at the step, and a corresponding step 236 is provided on the fixing plate, so that the heat dissipation component can be fixed to the receiving plate through the fixing plate. The receiving plate is provided with a hollow cavity 233, which contacts the optical engine housing. The heat generated during the operation of the optical channel is transferred through the optical engine housing, heating the air in the hollow cavity, and then transferring it to the heat dissipation component, so as to accelerate the flow of hot air in the hollow cavity through the heat dissipation component, thereby accelerating the heat transfer in the optical engine housing. In order to make the hot air in the fluid channel flow to the fluid outlet, the inner wall of the fluid channel guides the fluid in the horizontal direction. The inner wall of the fixing component can be set to a gradually narrowing inclined shape, using the Venturi effect to accelerate the airflow, improve the heat dissipation efficiency, and accelerate the airflow in the fluid channel to the fluid outlet. The placement of the heat dissipation slots on the front cover corresponds to the heat dissipation components, facilitating the dissipation of heat from the heat dissipation components through the heat dissipation slots.

[0033] The heat dissipation process is the core of this solution: when the optical engine is working, the lamp panel 22 is the main heat source. To dissipate heat in a timely manner, a fan 21 is installed on the optical engine housing 24 corresponding to the lamp panel, and this fan is independently controlled by a fan control board 210. In the horizontal direction, the lamp panel 22 is located between the fan 21 and the heat dissipation assembly 23. The heat dissipation assembly 23 is installed on the optical engine housing via a support plate 230, with its core heat sink 231 facing the back of the lamp panel. A clear fluid channel 27 is formed between the lamp panel 22 and the heat sink 231. When the fan 21 operates, it generates a directional airflow, blowing the large amount of heat generated when the lamp panel is working directly into the fluid channel 27. The hot air flows in the channel and is finally discharged from the fluid outlet 270 located at the bottom of the heat sink 231, directly impacting the heat sink 231. The heat sink 231 has densely distributed heat dissipation fins 234 on both sides, and the heat dissipation gaps 235 formed between the fins greatly increase the contact area with the air, thereby efficiently dissipating heat into the surrounding environment. Furthermore, the hollow cavity 233 on the receiving plate 230 is in close contact with the optical engine housing 24, which can guide the internal heat (such as from lens assemblies, motors, etc.) conducted through the housing to the heat dissipation assembly area, participating in the aforementioned heat dissipation cycle. Finally, all the heated air is exhausted outside the machine through the heat dissipation slots 15 on the front shell 10 and the rear cover 11, forming a highly efficient active heat dissipation system.

[0034] Furthermore, such as Figures 7-8 As shown, a lamp bead hole 240 is provided below the optical engine housing 24, and multiple lens slots 242 are provided above the lamp bead hole. Some lenses are inserted into the lens slots. A reflective lens fixing position 243 is provided at an angle above the lens slot. The reflective lens is placed here to change the transmission path of light. A lens hole 241 is provided in the vertical direction. The lens is placed at the lens hole. The light emitted by the lamp bead passes through the lens on the lens slot and then changes the transmission path of the light under the action of the reflective lens before reaching the lens.

[0035] Furthermore, such as Figures 4-6 and Figure 10 As shown, the optical engine housing 24 is also equipped with a motor 260 and a rotating sleeve 262 connected to the motor. When the motor is working, it drives the rotating sleeve to rotate and thus rotates the lens 26, thereby achieving image magnification and correction. To facilitate the motor 260 driving the rotating sleeve 262 to rotate, a retaining tooth 2621 is connected to the motor shaft. The rotating sleeve 262 has a retaining tooth 2621 on its side corresponding to the retaining tooth. The retaining tooth meshes with the retaining tooth so that when the motor is working, it drives the retaining tooth to rotate and thus rotates the rotating sleeve. The rotating sleeve and the lens are connected to the connecting post through the connecting hole 263 to achieve synchronous rotation. The rotating sleeve is also equipped with an outer flange 2620 on its side. The optical engine housing is equipped with a limiting clamp 261, which has a clamping part 2621. The outer flange rotates within the clamping part, thereby ensuring that the rotating sleeve rotates in a plane, preventing the rotating sleeve from tilting during rotation, and improving the projection effect.

[0036] To achieve precise rotation control of the lens 26 for image scaling and correction, this mechanism includes a rotating sleeve 262 driven by a motor 260. The motor 260 is preferably a stepper motor, with a drive gear (not labeled in the figure) fixedly mounted on its output shaft. The outer periphery of the rotating sleeve 262 has teeth 2621 that mesh with the drive gear. The drive gear and the teeth on the rotating sleeve employ a fine-module gear design with a transmission ratio of 1:5 (e.g., the motor gear has 20 teeth, and the rotating sleeve teeth have 100 teeth). This transmission ratio design converts the high-speed, low-torque output of the motor into the low-speed, high-torque output required by the rotating sleeve, satisfying the smoothness and force required for lens adjustment. Furthermore, the high reduction ratio improves the system's transmission accuracy and control resolution, ensuring that for every pulse signal sent by the control board 4 to the motor, the rotating sleeve rotates only a small angle, thus achieving precise, stepless adjustment of the lens position and effectively preventing image jitter or loss of synchronization. The rotating sleeve is also provided with an outer flange 2620 on its side, and a limit clamp 261 is provided on the optical engine housing. The limit clamp 261 is provided with a clamping part 2621. The outer flange rotates in the clamping part, thereby ensuring that the rotating sleeve rotates stably in the plane, avoiding tilting during rotation, and ensuring the stability of the projection optical path and the quality of the projection image.

[0037] In summary, this application innovatively designs a highly efficient directional heat dissipation path—"fan-fluid channel-heat dissipation component"—by optimizing the internal structural layout of the optical engine, and combines this with the heat dissipation slots on the outer casing to construct a complete and efficient heat dissipation system. Simultaneously, the lens drive mechanism is structurally stable and precisely controlled, jointly ensuring the projector's stable performance and clear image quality under prolonged high-load operation.

[0038] It should be understood that this application has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this application. Furthermore, based on the teachings of this application, these features and embodiments can be modified to suit specific circumstances and materials without departing from the spirit and scope of this application. Therefore, this application is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this application.

Claims

1. A high-efficiency heat dissipation projector optical engine, comprising an optical engine housing, and a lens assembly, a lamp board, and a lens disposed within the optical engine housing, characterized in that: The lamp panel is disposed at the bottom of the optical engine housing, the lens is disposed at the top of the optical engine housing, the lens assembly is disposed in the optical path between the lamp panel and the lens, and includes a reflective lens for changing the direction of the optical path. A fan is disposed on the optical engine housing, one side of the lamp panel faces the fan, and a heat dissipation assembly is disposed on the other side. A fluid channel is formed between the lamp panel and the heat dissipation assembly, and the heat dissipation component of the heat dissipation assembly is disposed at the end of the fluid channel. The fan is configured to blow airflow through the fluid channel and guide it to the heat dissipation component.

2. The projector optical engine according to claim 1, characterized in that: The heat sink has multiple heat dissipation wings on both sides, and heat dissipation gaps are formed between the heat dissipation wings.

3. The projector optical engine according to claim 2, characterized in that: The heat dissipation assembly also includes a receiving plate, and the heat dissipation component is mounted on the receiving plate via a fixing plate. The receiving plate is provided with a hollow cavity that contacts the optical engine housing.

4. The projector optical engine according to claim 1, characterized in that: The inner wall of the fluid channel is inclined to guide and accelerate the airflow toward the heat sink.

5. The projector optical engine according to any one of claims 1-4, characterized in that: A motor is installed on the optical engine housing, and a drive gear is connected to the output end of the motor. A rotating sleeve is fitted around the lens, and the outer periphery of the side wall of the rotating sleeve is provided with retaining teeth that mesh with the drive gear.

6. The projector optical engine according to claim 5, characterized in that: The rotating sleeve has an outer flange on its side, and the optical engine housing has a limiting clamp with a clamping part for accommodating the outer flange and restricting its axial movement.

7. The projector optical engine according to claim 1, characterized in that: The lens assembly includes a reflective lens disposed in the optical path, and the optical engine housing is provided with an inclined reflective lens fixing position for mounting the reflective lens to change the direction of optical path propagation.

8. The projector optical engine according to claim 7, characterized in that: The line connecting the lamp plate and the lens is inclined. The optical engine housing has multiple sets of lens slots above the lamp plate for mounting lenses. The lamp plate and some lenses are located on the incident light path side of the reflective lens, and the lens is located on the outgoing light path side of the reflective lens.

9. A projector, comprising a housing, characterized in that: The housing contains a projector optical engine with high-efficiency heat dissipation as described in any one of claims 1-8, the housing is provided with a power interface and a USB interface, and the bottom of the housing is provided with feet.

10. The projector according to claim 9, characterized in that: The outer shell includes a front shell and a rear cover. The front shell is provided with heat dissipation grooves corresponding to the heat dissipation components, and the rear cover is provided with heat dissipation grooves. The front shell is provided with fixing fins, which fix the optical engine inside the outer shell.

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