Projection ray machine and projection equipment

Abstract

The invention provides a projection light machine and projection equipment, and relates to the technical field of optics. According to the projection light machine, the optical assembly in the projection light machine can be rapidly heated, and the heat dissipation efficiency of the projection light machine can be improved. The projection ray machine comprises a base body, an optical assembly, an imaging assembly and a liquid cooling medium. Wherein the base body is provided with a heating cavity and a cooling cavity; the optical assembly is arranged on the base body; the imaging assembly is arranged in the cooling cavity, the imaging assembly is used for enabling the illumination light beam transmitted to the imaging assembly to form a projection image, and the light beam of the projection image is adjusted by the optical assembly to form a projection picture; and the liquid cooling medium is positioned in the heating cavity and the cooling cavity.

Description

A projection optical engine and projection device Technical Field

[0001] This application relates to the field of optical technology, and in particular to a projection optical engine and projection device. Background Technology

[0002] In Liquid Crystal Display (LCD) projection technology, the improvement of projection brightness is limited by the LCD temperature. While a fully enclosed heat dissipation solution can reduce dust entering the projection device, it also limits the device's heat dissipation capacity.

[0003] When a projection device is used in a low-temperature working environment, the internal temperature of the device is higher than the ambient temperature, and the humidity is also higher. This can easily cause water vapor to form on the lens, reflector, and other components of the projection device, which can affect the quality of the projected image.

[0004] Therefore, there is a need for a projection device that can achieve good heat dissipation and reduce or even eliminate water mist on the lens. Summary of the Invention

[0005] This application provides a projection optical engine and projection device, which can realize rapid heating of optical components in the projection optical engine and improve the heat dissipation efficiency of the projection optical engine.

[0006] On one hand, this application provides a projection optical engine, which includes: a substrate, an optical component, an imaging component, and a liquid cooling medium. The substrate has a heating cavity and a cooling cavity; the optical component is disposed on the substrate, and at least a portion of the optical component is connected to the cavity wall of the heating cavity; the imaging component is disposed within the cooling cavity, and the imaging component is used to form a projected image from an illumination beam transmitted to the imaging component, the beam of the projected image being adjusted by the optical component to form a projected image; the liquid cooling medium is located within the heating cavity and the cooling cavity, and the liquid cooling medium is transparent; the heat generated by the imaging component is transferred to the optical component through the liquid cooling medium.

[0007] The projection optical engine provided in this application has a heating cavity and a cooling cavity on its substrate. At least a portion of the optical components can be connected to the cavity wall of the heating cavity, and the imaging component can be placed within the cooling cavity, which helps reduce the impact of dust and other contaminants on the optical and imaging components. Furthermore, both the heating and cooling cavities are filled with liquid cooling media. After the projection device using this projection optical engine enters the working state, the illumination beam irradiates the imaging component, causing its temperature to rise. The liquid cooling media surrounding the imaging component can quickly absorb the heat, and the liquid cooling media in the cooling cavity, after absorbing heat, transfers it to the liquid cooling media in the heating cavity. This not only dissipates heat and cools the imaging component, keeping its temperature within a suitable range and improving the heat dissipation efficiency of the projection optical engine, but also allows for rapid heating of the optical components, ensuring their temperature exceeds the ambient temperature, thereby reducing water vapor formation on the optical components in low-temperature environments. Therefore, the projection optical engine provided in this application can achieve rapid heating of the optical components and improve the heat dissipation efficiency of the projection optical engine.

[0008] In one possible implementation of this application, the heating chamber and the cooling chamber are connected.

[0009] In the technical solution of this application, since the heating cavity and the cooling cavity are connected, after the temperature of the liquid cooling medium in the cooling cavity rises, under the action of temperature difference, the liquid cooling medium with a higher temperature in the cooling cavity and the liquid cooling medium with a lower temperature in the heating cavity can generate a circulating flow, thereby accelerating the heat transfer between the liquid cooling medium in the cooling cavity and the liquid cooling medium in the heating cavity, thereby improving the efficiency of cooling the imaging component and the efficiency of heating the optical component.

[0010] In one possible implementation of this application, a separator is provided between the heating chamber and the cooling chamber, which separates the heating chamber and the cooling chamber into two independent chambers. The separator has thermal conductivity, and the heat of the liquid cooling medium in the cooling chamber is transferred to the liquid cooling medium in the heating chamber through the separator.

[0011] In this technical solution, since the heating chamber and cooling chamber are separated into two independent chambers by an isolator, the flow range of the liquid cooling medium in the cooling chamber can be reduced when the temperature changes and the liquid cooling medium flows, thereby reducing the impact of the liquid cooling medium flow on the beam. Furthermore, the isolator has thermal conductivity, allowing the heat from the liquid cooling medium in the cooling chamber to be rapidly transferred to the liquid cooling medium in the heating chamber through the isolator.

[0012] In one possible implementation of this application, the heating chamber and / or cooling chamber are provided with a disturbance mechanism, which is used to drive the flow of the liquid cooling medium.

[0013] In the technical solution of this application, since a disturbance mechanism is provided in the heating cavity and / or cooling cavity, the disturbance mechanism can disturb the liquid cooling medium when the projection optical engine is working, thereby accelerating the flow speed of the liquid cooling medium and thus accelerating the heat transfer efficiency of the liquid cooling medium.

[0014] In one possible implementation of this application, the insulating member includes a first heat-conducting part and a second heat-conducting part, the first heat-conducting part being located in a cooling cavity and the second heat-conducting part being located in a heating cavity.

[0015] In the technical solution of this application, since the isolation component has a first heat-conducting part and a second heat-conducting part, the contact area between the liquid cooling medium in the cooling cavity and the isolation component can be increased by the first heat-conducting part, and the contact area between the liquid cooling medium in the heating cavity and the isolation component can be increased by the second heat-conducting part, thereby improving the efficiency of heat transfer between the liquid cooling medium in the cooling cavity and the liquid cooling medium in the heating cavity through the isolation component.

[0016] In one possible implementation of this application, the isolation member further includes a fixing part that matches the imaging assembly, and the imaging assembly is fixed to the fixing part.

[0017] In the technical solution of this application, since a fixing part matching the imaging component is provided on the isolation component, the fixing part can not only provide an installation point for the imaging component, but also allow the isolation component with good thermal conductivity to directly contact the imaging component, which is beneficial to improve the speed of heat transfer from the imaging component to the isolation component. The fixing part can also increase the contact area between the imaging component and the liquid cooling medium, which is beneficial to improve the speed of heat transfer from the imaging component to the liquid cooling medium.

[0018] In one possible implementation of this application, the projection optical engine further includes a liquid flow pipe that extends from the cooling chamber through the isolation member to the heating chamber, with both the pipe inlet and outlet located in the heating chamber; the liquid cooling medium located in the heating chamber flows into the liquid flow pipe from the pipe inlet and flows back to the heating chamber from the pipe outlet.

[0019] In the technical solution of this application, since the liquid flow pipe extends from the cooling chamber through the isolation member to the heating chamber, the liquid cooling medium in the heating chamber can circulate in the liquid flow pipe and the heating chamber, thereby allowing the liquid cooling medium in the heating chamber to flow to the cooling chamber through the liquid flow pipe, which can improve the efficiency of heat transfer between the liquid cooling medium in the heating chamber and the liquid cooling medium in the cooling chamber.

[0020] In one possible implementation of this application, the heating cavity includes a first heating cavity, and the optical component includes a reflector connected to the cavity wall of the first heating cavity. The reflector is used to reflect the beam of the projected image.

[0021] In the technical solution of this application, since the heating cavity includes a first heating cavity and the optical component includes a reflector, the reflector can be fixed on the cavity wall of the first heating cavity to change the propagation direction of the beam of the projected image. The heat generated by the imaging component can also be transferred to the reflector through the liquid cooling medium in the cooling cavity and the first heating cavity, so that the reflector can be heated quickly so that the temperature of the reflector is higher than the temperature of the environment where the projection optical engine is located, which helps to reduce the water mist formed on the reflector.

[0022] In one possible implementation of this application, the heating cavity further includes a second heating cavity, and the optical component further includes a lens connected to the cavity wall of the second heating cavity. The beam of the projected image is transmitted to the lens after being reflected by a reflector.

[0023] In the technical solution of this application, since the heating cavity includes a second heating cavity and the optical component includes a lens, the lens can be fixed on the cavity wall of the second heating cavity to adjust the aspect ratio of the projected image, etc., and the heat generated by the imaging component can be transferred to the lens through the liquid cooling medium in the cooling cavity and the second heating cavity, so that the lens can be heated quickly so that the temperature of the lens is higher than the temperature of the environment where the projection optical engine is located, which helps to reduce the water mist formed on the lens.

[0024] In one possible implementation of this application, the substrate further has a receiving cavity, which is adjacent to a heating cavity and a cooling cavity, respectively, and at least a portion of the optical component is located in the receiving cavity; the cavity wall between the receiving cavity and the heating cavity has a heat-conducting through hole, and at least a portion of the optical component is sealed to the edge of the heat-conducting through hole in the cavity wall, and the liquid cooling medium contacts at least a portion of the optical component through the heat-conducting through hole.

[0025] In this application's technical solution, a receiving cavity is provided between the cooling cavity and the heating cavity. This receiving cavity not only provides installation space for the optical components but also allows the beam of the projected image to be transmitted within it, which helps reduce the influence of dust and other contaminants on the beam of the projected image. Furthermore, sealing at least a portion of the optical components with the cavity wall at the edge of the heat-conducting through-hole allows the liquid cooling medium to directly contact the optical components, thereby improving the efficiency of heat transfer from the liquid cooling medium to the optical components.

[0026] In one possible implementation of this application, the substrate further has a receiving cavity, which is adjacent to a heating cavity and a cooling cavity respectively. A heat insulation element is provided between the receiving cavity and the cooling cavity. The heat insulation element is used to block the heat generated by the imaging component from being transferred to the receiving cavity. The heat insulation element is light-transmitting.

[0027] In the technical solution of this application, since there is a light-transmitting heat insulation component between the accommodating cavity and the cooling cavity, not only can the beam of the projected image be transmitted to the optical component through the heat insulation component, but the heat insulation component can also block the heat generated by the imaging component from being transferred to the accommodating cavity, thereby reducing the rate of temperature rise in the accommodating cavity. In this way, the rate of temperature rise in the accommodating cavity can be slower than the rate of temperature rise in the optical component, which is beneficial to further reduce the possibility of water mist being generated on the optical component.

[0028] In one possible implementation of this application, the projection optical engine further includes an external cooling component, which is connected to the substrate and at least communicates with the heating cavity. The liquid cooling medium circulates between the heating cavity and the external cooling component, or the liquid cooling medium circulates between the heating cavity, the cooling cavity and the external cooling component. The external cooling component is used to dissipate heat from the liquid cooling medium.

[0029] In this application's technical solution, because an external cooling component is provided on the substrate and is at least connected to the heating cavity, the liquid cooling medium can circulate between the heating cavity and the external cooling component, or it can circulate between the heating cavity, the cooling cavity, and the external cooling component. This increases the surface area for heat dissipation of the liquid cooling medium through the external cooling component, thereby improving the cooling efficiency of the liquid cooling medium. Thus, after the projection optical engine has been operating for a period of time, if the temperature of the optical components exceeds that of the liquid cooling medium due to irradiation by the beam, the liquid cooling medium can simultaneously dissipate heat and cool both the imaging components and the optical components.

[0030] In one possible implementation of this application, the projection optical engine further includes a heat dissipation component adjacent to the substrate, the substrate being made of a thermally conductive material, and the heat dissipation component being used to accelerate the airflow speed around the substrate.

[0031] In this application's technical solution, because the substrate uses a thermally conductive material, it can absorb heat from the liquid cooling medium at a relatively fast rate. Furthermore, a heat dissipation component is positioned adjacent to the substrate, which accelerates the airflow around the substrate, thereby improving the heat exchange efficiency between the substrate and the surrounding air. Simultaneously, after the projection engine has been operating for a period of time, if the optical components become hotter than the liquid cooling medium due to beam irradiation, the liquid cooling medium can simultaneously dissipate heat from both the imaging component and the optical components, thus improving the overall heat dissipation efficiency of the projection engine.

[0032] In one possible implementation of this application, the outer wall of the substrate has a first heat dissipation structure, and / or the heating cavity has a second heat dissipation structure, and / or the cooling cavity has a third heat dissipation structure, both of which extend into the liquid cooling medium.

[0033] In this application's technical solution, the heating cavity has a second heat dissipation structure, and the cooling cavity has a third heat dissipation structure. These two structures increase the contact area between the substrate and the liquid cooling medium, thereby accelerating the transfer of heat from the liquid cooling medium to the substrate. Furthermore, the outer wall of the substrate has a first heat dissipation mechanism, which increases the contact area between the substrate and the surrounding air, further improving the rate at which heat dissipates from the substrate to the surrounding air. Simultaneously, after the projection optical engine has been operating for a period of time, if the optical components become hotter than the liquid cooling medium due to beam irradiation, the liquid cooling medium can simultaneously dissipate heat from both the imaging components and the optical components, thus improving the heat dissipation efficiency of the projection optical engine.

[0034] In one possible implementation of this application, the projection optical engine further includes a semiconductor cooler, the cold end of which abuts against the cavity wall of the cooling chamber, or the cold end of the semiconductor cooler is located inside the cooling chamber.

[0035] In this application's technical solution, by placing the cold end of the thermoelectric cooler against the wall of the cooling cavity, or by placing the cold end of the thermoelectric cooler inside the cooling cavity, the liquid cooling medium inside the cooling cavity can be cooled relatively quickly using the thermoelectric cooler. This allows for better control of the imaging component's temperature after the projection optical engine has been operating for a period of time (when the temperature of the optical components rises), ensuring that the imaging component operates at a lower temperature.

[0036] In one possible implementation of this application, the imaging component includes a liquid crystal light valve.

[0037] In this application's technical solution, since the imaging component includes a liquid crystal light valve, a high-contrast and clear projected image can be formed through the liquid crystal light valve. Furthermore, the liquid cooling medium can dissipate heat from the liquid crystal light valve, allowing it to operate at a lower temperature, thereby enabling the projection engine to have higher brightness and improving the brightness of the projected image.

[0038] On the other hand, this application provides a projection device, which includes a light source assembly and a projection optical engine provided by any of the above. The light source assembly and the imaging assembly are disposed adjacent to each other, and the illumination beam generated by the light source assembly is transmitted to the imaging assembly.

[0039] The projection device provided in this application includes any of the projection optical engines provided above. Therefore, it can achieve rapid heating of the optical components in the projection optical engine and improve the heat dissipation efficiency of the projection optical engine. This is beneficial for keeping the imaging components in a lower operating state, thereby improving the brightness of the projected image formed by the projection device. Attached Figure Description

[0040] Figure 1 is a schematic diagram of the projection optical engine provided in this application;

[0041] Figure 2 is a cross-sectional structural schematic diagram of the projection optical engine provided in this application;

[0042] Figure 3 is a cross-sectional view of the projection optical engine provided in this application.

[0043] Figure 4 is a schematic diagram of the isolation component in the projection optical engine provided in this application;

[0044] Figure 5 is a cross-sectional structural schematic diagram of the projection optical engine provided in this application;

[0045] Figure 6 is a cross-sectional structural diagram of the projection optical engine provided in this application.

[0046] Explanation of reference numerals in the attached figures:

[0047] 1-Substrate; 11-Heating cavity; 111-First heating cavity; 112-Second heating cavity; 113-Heat-conducting through hole; 12-Cooling cavity; 13-Accommodation cavity; 2-Optical component; 21-Reflector; 22-Lens; 3-Imaging component; 4-Disturbance mechanism; 5-Isolation component; 51-Isolation body; 52-First heat-conducting part; 53-Second heat-conducting part; 54-Fixing part; 6-Liquid flow pipe; 61-Pipe inlet; 62-Pipe outlet; 7-Heat insulation component; 81-External cooling component; 82-Heat dissipation component; 83-Semiconductor cooler; 9-Optical lens. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below with reference to the accompanying drawings of the embodiments of this application. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.

[0049] In the embodiments 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0050] Furthermore, in the embodiments of this application, directional terms such as "upper," "lower," "left," and "right" are defined relative to the positions in which the components are schematically placed in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the position of the components in the accompanying drawings.

[0051] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0052] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0053] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0054] The brightness of an LCD projector is limited by its operating temperature. Improving brightness requires maintaining a relatively high operating temperature, necessitating excellent heat dissipation. While open-type cooling systems offer high heat dissipation efficiency, dust can easily enter the device, affecting performance. Conversely, fully enclosed cooling systems prevent dust entry but compromise heat dissipation, leading to higher LCD temperatures that may not meet high-brightness projection requirements and potentially shortening the device's lifespan.

[0055] During the initial stages of projector operation, the lens and mirror of a projection device are at temperatures close to the ambient temperature, especially in cooler environments. However, the space inside the projector where the lens and mirror are installed may be warmer and more humid than the ambient temperature. This can cause condensation to form on the surfaces of the lens and mirror, affecting projection quality. While the temperature of the lens and mirror rises as the projector continues to operate, reducing or eliminating the condensation, this process takes time and still impacts projection quality. Related technologies use hot air to heat the lens and mirror, increasing their temperature and reducing condensation. However, this method of heating the lens and mirror with hot air is insufficient to heat them effectively during the initial stages of operation, resulting in continued condensation.

[0056] This application provides a projection optical engine that can rapidly heat the optical components to reduce or even eliminate water vapor formation on them, while also improving the heat dissipation efficiency of the projection optical engine. Referring to Figures 1 and 2, Figure 1 is a schematic diagram of the projection optical engine provided in this application, and Figure 2 is a cross-sectional schematic diagram of the projection optical engine provided in this application. The projection optical engine includes: a substrate 1, an optical component 2, an imaging component 3, and a liquid cooling medium. The substrate 1 has a heating cavity 11 and a cooling cavity 12; the optical component 2 is disposed on the substrate 1, and at least a portion of the optical component 2 is connected to the cavity wall of the heating cavity 11; the imaging component 3 is disposed within the cooling cavity 12, and the imaging component 3 is used to form a projected image from the illumination beam transmitted to the imaging component 3, the beam of which is adjusted by the optical component 2 to form the projected image; the liquid cooling medium is located within the heating cavity 11 and the cooling cavity 12, and the liquid cooling medium is transparent; the heat generated by the imaging component 3 is transferred to the optical component 2 through the liquid cooling medium.

[0057] In this embodiment, the projection optical engine can be used in a projection device, and the imaging component 3 in the projection optical engine can generate a projected image. The imaging component 3 can be a digital micromirror device, a reflective liquid crystal panel, etc., and can generate an illumination beam from the light source component in the projection device to illuminate the imaging component 3. The illumination beam can form a projected image under the adjustment and control of the imaging component 3.

[0058] In this embodiment, the optical component 2 can reflect and refract the beam of the projected image to adjust the transmission path of the beam and the aspect ratio of the projected image, so that the beam of the projected image can be formed into a projected image suitable for viewing. For example, the optical component 2 can use optical lenses such as plane mirrors, convex lenses, and concave lenses.

[0059] In this embodiment, the substrate 1 can be used to support and install other components in the projection optical engine. The structure of the substrate 1 can be set according to the shape of the components installed on the substrate 1 and the distribution of each component. For example, the substrate 1 can be set as a box-shaped structure with cavities, and the substrate 1 can be made of materials such as plastic or metal.

[0060] For example, as shown in Figure 2, two chambers can be provided in the substrate 1, serving as a heating chamber 11 and a cooling chamber 12. The structure of the cooling chamber 12 matches the structure of the imaging component 3, allowing the imaging component 3 to be disposed within the cooling chamber 12, for example, by fixing the imaging component 3 near the center of the cooling chamber 12. The optical component 2 can be fixed to the substrate 1, with at least a portion of the optical component 2 connected to the cavity wall of the heating chamber 11, for example, by adhesive bonding to the outer wall of the heating chamber 11, and the optical component 2 is located on the transmission path of the beam of the projected image.

[0061] In this embodiment, the liquid cooling medium can absorb and transfer heat at a relatively fast rate. For example, the liquid cooling medium can be a liquid with good light transmittance, which can reduce the impact on the illumination beam and the projected image beam. The liquid cooling medium can be electronic fluorinated liquid, electronic coolant, etc.

[0062] For example, the entire cooling chamber 12 can be filled with liquid cooling medium so that the imaging component 3 is completely covered by the liquid cooling medium. The entire heating chamber 11 can be filled with liquid cooling medium so that at least a portion of the optical component 2 is adjacent to the liquid cooling medium through the cavity wall of the heating chamber 11. In this way, both the adjacent heating chamber 11 and cooling chamber 12 are filled with liquid cooling medium. When the imaging component 3 generates heat during operation, the liquid cooling medium around the imaging component 3 can absorb the heat generated by the imaging component 3 in a timely manner. After the liquid cooling medium in the cooling chamber 12 absorbs the heat from the imaging component 3 and heats up, it can transfer the heat to the liquid cooling medium in the heating chamber 11 in a timely manner. The liquid cooling medium in the heating chamber 11 then transfers the heat to the optical component 2 at least through the cavity wall. This allows the heat generated by the imaging component 3 to dissipate in a timely manner and allows for timely and rapid heating of the optical component 2.

[0063] The projection optical engine provided in this embodiment has a heating cavity 11 and a cooling cavity 12 on the substrate 1. At least a portion of the optical component 2 can be connected to the cavity wall of the heating cavity 11, and the imaging component 3 can be placed inside the cooling cavity 12. This helps reduce the impact of dust and other contaminants on the optical component 2 and the imaging component 3. Furthermore, both the heating cavity 11 and the cooling cavity 12 are filled with liquid cooling medium. After the projection device using this projection optical engine enters the working state, the illumination beam irradiates the imaging component 3, causing its temperature to rise. The liquid cooling medium surrounding the imaging component 3 can absorb the heat from the imaging component 3 in a timely manner. After absorbing the heat, the liquid cooling medium in the cooling cavity 12 transfers the heat to the liquid cooling medium in the heating cavity 11. This not only dissipates heat and cools the imaging component 3, keeping its temperature within a suitable range and improving the heat dissipation efficiency of the projection optical engine, but also allows for faster heating of the optical component 2, ensuring its temperature is higher than the ambient temperature. This reduces water vapor formation on the optical component 2 in lower-temperature environments. Therefore, the projection optical engine provided in this application embodiment can achieve rapid heating of the optical component 2 in the projection optical engine and improve the heat dissipation efficiency of the projection optical engine.

[0064] In some possible embodiments of this application, as shown in FIG2, the heating chamber 11 and the cooling chamber 12 are connected.

[0065] In this embodiment, the heating cavity 11 and cooling cavity 12 within the substrate 1 can be configured as interconnected cavities. For example, the cooling cavity 12 and heating cavity 11 can both be distributed along the contour of the substrate 1 within the substrate 1, with the cooling cavity 12 and heating cavity 11 located on adjacent sides within the substrate 1, and connected at the corners of the substrate 1. In other words, the cooling cavity 12 and heating cavity 11 can be a single, sealed chamber. Thus, after the liquid cooling medium is filled into the heating cavity 11 and cooling cavity 12, the liquid cooling medium can circulate freely within the heating cavity 11 and cooling cavity 12.

[0066] In the above embodiment, since the heating chamber 11 and the cooling chamber 12 are connected, after the temperature of the liquid cooling medium in the cooling chamber 12 rises, under the effect of the temperature difference, the liquid cooling medium with a higher temperature in the cooling chamber 12 and the liquid cooling medium with a lower temperature in the heating chamber 11 can generate a circulating flow, thereby accelerating the heat transfer between the liquid cooling medium in the cooling chamber 12 and the liquid cooling medium in the heating chamber 11, thereby improving the efficiency of cooling the imaging component 3 and the efficiency of heating the optical component 2.

[0067] In some possible embodiments of this application, referring to FIG3, FIG3 is a cross-sectional structural schematic diagram of the projection optical engine provided in this application. A separator 5 is provided between the heating chamber 11 and the cooling chamber 12. The separator 5 separates the heating chamber 11 and the cooling chamber 12 into two independent chambers. The separator 5 has thermal conductivity, and the heat of the liquid cooling medium in the cooling chamber 12 is transferred to the liquid cooling medium in the heating chamber 11 through the separator 5.

[0068] In this embodiment, the heating chamber 11 and the cooling chamber 12 can be configured as two independent chambers to reduce the flow or disturbance of the liquid cooling medium in the cooling chamber 12. As shown in FIG3, a spacer 5 can be provided between the heating chamber 11 and the cooling chamber 12, and the spacer 5 can be sealed to the base 1, or the spacer 5 can be integrally formed with the base 1, so that the heating chamber 11 and the cooling chamber 12 are separated by the spacer 5, so that the heating chamber 11 and the cooling chamber 12 become two independent and sealed chambers.

[0069] For example, the isolator 5 can be made of a material with good thermal conductivity, such as a copper sheet or an aluminum sheet. After the heating cavity 11 and the cooling cavity 12 are separated by the isolator 5, the same liquid cooling medium can be filled into the heating cavity 11 and the cooling cavity 12 respectively. In this way, after the liquid cooling medium in the cooling cavity 12 absorbs the heat generated by the imaging component 3 and becomes heated, the heat can be transferred to the liquid cooling medium in the heating cavity 11 through the isolator 5, and the liquid cooling medium in the heating cavity 11 can then transfer the heat to the optical component 2.

[0070] In the above embodiment, since the heating chamber 11 and the cooling chamber 12 are separated into two independent chambers by the insulating member 5, the flow range of the liquid cooling medium in the cooling chamber 12 can be reduced when the temperature of the liquid cooling medium changes and it flows, thereby reducing the impact of the liquid cooling medium flow on the light beam. Furthermore, the insulating member 5 has thermal conductivity, allowing the heat from the liquid cooling medium in the cooling chamber 12 to be quickly transferred to the liquid cooling medium in the heating chamber 11 through the insulating member 5.

[0071] In some possible embodiments of this application, as shown in FIG3, the heating chamber 11 and / or cooling chamber 12 are provided with a disturbance mechanism 4, which is used to drive the flow of liquid cooling medium.

[0072] In this embodiment, the heat transfer efficiency of the liquid cooling medium can be increased by accelerating its flow velocity. For example, when the heating chamber 11 and the cooling chamber 12 are connected, a disturbance mechanism 4 can be provided in the heating chamber 11 to drive the liquid cooling medium in the heating chamber 11 and the cooling chamber 12 to flow at a faster speed. When the heating chamber 11 and the cooling chamber 12 are separated and independent of each other, a disturbance mechanism 4 can be provided in the heating chamber 11, or in the cooling chamber 12, or one disturbance mechanism 4 can be provided in each of the heating chamber 11 and the cooling chamber 12.

[0073] For example, the disturbance mechanism 4 can be a paddle driven by a motor, or a stirring rod driven by a motor to oscillate back and forth. This application does not limit the specific structure of the disturbance mechanism 4.

[0074] In the above embodiments, since the heating cavity 11 and / or cooling cavity 12 are provided with a disturbance mechanism 4, when the projection optical engine is working, the disturbance mechanism 4 can disturb the liquid cooling medium, thereby accelerating the flow speed of the liquid cooling medium and thus accelerating the heat transfer efficiency of the liquid cooling medium.

[0075] In some possible embodiments of this application, referring to FIG4, FIG4 is a schematic diagram of the structure of the isolation member in the projection optical engine provided in this application. The isolation member 5 includes a first heat-conducting part 52 and a second heat-conducting part 53. The first heat-conducting part 52 is located in the cooling cavity 12, and the second heat-conducting part 53 is located in the heating cavity 11.

[0076] In this embodiment, a heat-conducting part can be provided on the isolation member 5 to increase the surface area of ​​the isolation member 5. As shown in FIG4, a first heat-conducting part 52 and a second heat-conducting part 53 can be provided on both sides of the isolation body 51 of the isolation member 5, and the isolation body 51 is sealed to the base 1 to separate the cooling chamber 12 and the heating chamber 11 into two independent chambers through the isolation body 51.

[0077] For example, both the first heat-conducting part 52 and the second heat-conducting part 53 can be configured to include structures such as multiple thin sheets, multiple thin rods, and multiple protrusions. The first heat-conducting part 52 can extend into the region of the cooling cavity 12 near the imaging component 3, and the second heat-conducting part 53 can extend into the heating cavity 11. For example, the second heat-conducting part 53 can be configured to be curved, similar to the shape of the heating cavity 11, according to the spatial shape of the heating cavity 11.

[0078] In the above embodiments, since the isolation member 5 has a first heat-conducting part 52 and a second heat-conducting part 53, the contact area between the liquid cooling medium in the cooling cavity 12 and the isolation member 5 can be increased by the first heat-conducting part 52, and the contact area between the liquid cooling medium in the heating cavity 11 and the isolation member 5 can be increased by the second heat-conducting part 53, thereby improving the efficiency of heat transfer between the liquid cooling medium in the cooling cavity 12 and the liquid cooling medium in the heating cavity 11 through the isolation member 5.

[0079] In some possible embodiments of this application, as shown in FIG4, the isolation member 5 further includes a fixing part 54, which matches the imaging component 3 and the imaging component 3 is fixed to the fixing part 54.

[0080] In this embodiment, a fixing part 54 can be provided on the side of the isolation body 51 of the isolation member 5 facing the cooling cavity 12. The fixing part 54 is configured to match the imaging component 3 so as to provide an installation point for the imaging component 3 through the fixing part 54 and fix the imaging component 3 on the fixing part 54.

[0081] For example, the fixing part 54 can be configured as a plate-like structure. For instance, by providing two plates on the isolation body 51, corresponding surfaces of the imaging component 3 can abut against these two plates, and the imaging component 3 can be fixed to the two plates by adhesive bonding or by using fasteners such as screws. Alternatively, a plate-like structure or block-like structure matching the surface shape of the imaging component 3 can be provided on the isolation body 51 to abut against and fix one surface of the imaging component 3 to the plate-like structure or block-like structure.

[0082] In the above embodiments, since the isolation member 5 is provided with a fixing part 54 that matches the imaging component 3, the fixing part 54 can not only provide an installation point for the imaging component 3, but also allow the isolation member 5 with good thermal conductivity to directly contact the imaging component 3, which is beneficial to improve the speed at which the heat generated by the imaging component 3 is transferred to the isolation member 5. The fixing part 54 can also increase the contact area between the imaging component 3 and the liquid cooling medium, which is beneficial to improve the speed at which the heat generated by the imaging component 3 is transferred to the liquid cooling medium.

[0083] In some possible embodiments of this application, referring to Figure 5, which is a cross-sectional structural schematic diagram of the projection optical engine provided in this application, the projection optical engine also includes a liquid flow pipe 6, which extends from the cooling chamber 12 through the isolation member 5 to the heating chamber 11. The pipe inlet 61 and pipe outlet 62 of the liquid flow pipe 6 are both located in the heating chamber 11. The liquid cooling medium located in the heating chamber 11 flows into the liquid flow pipe 6 from the pipe inlet 61 and flows back to the heating chamber 11 from the pipe outlet 62.

[0084] In this embodiment of the application, when the cooling chamber 12 and the heating chamber 11 are separated into two independent chambers by the isolation member 5, a liquid flow pipe 6 can also be provided in the projection optical engine to increase the heat transfer rate of the liquid cooling medium in the cooling chamber 12 and the liquid cooling medium in the heating chamber 11 through the liquid flow pipe 6.

[0085] For example, as shown in Figure 5, the liquid flow pipe 6 can be configured as an approximately U-shaped pipe with two openings located on the same side. These two openings can serve as the pipe inlet 61 and the pipe outlet 62, respectively. The liquid flow pipe 6 can be threaded through the isolation member 5, meaning the enclosed portion of the liquid flow pipe 6 is located within the cooling chamber 12. For instance, the liquid flow pipe 6 located within the cooling chamber 12 can surround the imaging assembly 3. Furthermore, both the pipe inlet 61 and the pipe outlet 62 of the liquid flow pipe 6 are located within the heating chamber 11. The liquid flow pipe 6 can be made of a metal material with good thermal conductivity, such as copper, aluminum, or alloys. In this way, the liquid cooling medium within the heating chamber 11 can flow into the liquid cooling pipe from the pipe inlet 61, pass through the liquid flow pipe 6 located within the cooling chamber 12, and then flow back to the heating chamber 11 from the pipe outlet 62.

[0086] In the above embodiment, since the liquid flow pipe 6 extends from the cooling chamber 12 through the isolation member 5 to the heating chamber 11, the liquid cooling medium in the heating chamber 11 can circulate in the liquid flow pipe 6 and the heating chamber 11, thereby allowing the liquid cooling medium in the heating chamber 11 to flow to the cooling chamber 12 through the liquid flow pipe 6, which can improve the efficiency of heat transfer between the liquid cooling medium in the heating chamber 11 and the liquid cooling medium in the cooling chamber 12.

[0087] In some possible embodiments of this application, referring to FIG6, FIG6 is a cross-sectional structural schematic diagram of the projection optical engine provided in this application. The heating cavity 11 includes a first heating cavity 111, and the optical component 2 includes a reflector 21. The reflector 21 is connected to the cavity wall of the first heating cavity 111, and the reflector 21 is used to reflect the beam of the projected image.

[0088] In this embodiment, the structure of the heating cavity 11 can be configured according to the number of lenses included in the optical component 2 and the position of the lenses on the substrate 1. For example, if the optical component 2 includes a reflector 21, a first heating cavity 111 can be provided in the substrate 1 to heat the reflector 21 through the liquid cooling medium in the first heating cavity 111.

[0089] For example, the first heating cavity 111 and the cooling cavity 12 can be arranged at an angle, such as 45°, or 50°, 60°, or 70°. This allows the end of the first heating cavity 111 furthest from the cooling cavity 12 to be located on the transmission path of the projected image beam. The reflector 21 can then be fixed to the outer wall of the first heating cavity 111, for example, by using thermally conductive adhesive to bond the reflector 21 to the outer wall of the first heating cavity 111, and the projected image beam can then illuminate the reflector 21. The reflector 21 can be a plane mirror, such as a plane mirror made of glass or resin.

[0090] In the above embodiments, since the heating cavity 11 includes a first heating cavity 111 and the optical component 2 includes a reflector 21, the reflector 21 can be fixed on the cavity wall of the first heating cavity 111 to change the propagation direction of the beam of the projected image. The heat generated by the imaging component 3 can also be transferred to the reflector 21 through the liquid cooling medium in the cooling cavity 12 and the first heating cavity 111, so that the reflector 21 can be heated quickly so that the temperature of the reflector 21 is higher than the temperature of the environment where the projection optical engine is located, which helps to reduce the water mist formed on the reflector 21.

[0091] In some possible embodiments of this application, as shown in FIG6, the heating cavity 11 further includes a second heating cavity 112, and the optical component 2 further includes a lens 22. The lens 22 is connected to the cavity wall of the second heating cavity 112, and the beam of the projected image is transmitted to the lens 22 after being reflected by the reflector 21.

[0092] In this embodiment of the application, the optical component 2 also includes a lens 22. The lens 22 may be a combination of multiple convex lenses and concave lenses. Through the lens 22, the aspect ratio, length, or width of the projected image can be changed.

[0093] For example, a first heating chamber 111 and a second heating chamber 112 can be respectively provided at both ends of the cooling chamber 12. Both the first heating chamber 111 and the second heating chamber 112 can be connected to or separated from the cooling chamber 12. A lens 22 can be attached to the cavity wall of the second heating chamber 112. For instance, a receiving groove or receiving hole matching the lens 22 can be provided on the cavity wall of the second heating chamber 112, and at least a portion of the lens 22 can abut against the receiving groove or receiving hole, thereby making the lens 22 abut against the cavity wall of the second heating chamber 112. Simultaneously, by positioning the lens 22 on the transmission path of the beam of the projected image reflected by the reflector 21, the projected image can be processed by the lens 22 to form a projected image suitable for viewing.

[0094] In the above embodiments, since the heating cavity 11 includes a second heating cavity 112 and the optical component 2 includes a lens 22, the lens 22 can be fixed on the cavity wall of the second heating cavity 112 so as to adjust the aspect ratio of the projected image, etc., through the liquid cooling medium in the cooling cavity 12 and the second heating cavity 112. The heat generated by the imaging component 3 can be transferred to the lens 22 through the liquid cooling medium in the cooling cavity 12 and the second heating cavity 112, so that the lens 22 can be heated quickly so that the temperature of the lens 22 is higher than the temperature of the environment where the projection optical engine is located, which helps to reduce the water mist formed on the lens 22.

[0095] In some possible embodiments of this application, as shown in FIG3, the substrate 1 further has a receiving cavity 13, which is adjacent to the heating cavity 11 and the cooling cavity 12 respectively, and at least a portion of the optical component 2 is located in the receiving cavity 13; the cavity wall between the receiving cavity 13 and the heating cavity 11 has a heat-conducting through hole 113, and at least a portion of the optical component 2 is sealed to the edge of the heat-conducting through hole 113 of the cavity wall, and the liquid cooling medium contacts at least a portion of the optical component 2 through the heat-conducting through hole 113.

[0096] In this embodiment of the application, a receiving cavity 13 can be provided in the substrate 1. For example, the receiving cavity 13 can be set as a sealed cavity, and the space between the cooling cavity 12 and the heating cavity 11 can be enclosed to form the receiving cavity 13.

[0097] For example, the reflector 21 in the optical assembly 2 can be disposed within the accommodating cavity 13, and a portion of the lens 22 in the optical assembly 2 can be connected to the cavity wall of the accommodating cavity 13. This allows the beam of the projected image to first travel within the accommodating cavity 13 to the reflector 21, and then, after reflection by the reflector 21, to the lens 22. This allows the beam of the projected image to travel within a sealed space, which helps reduce the influence of dust and other contaminants on the beam transmission of the projected image.

[0098] In another example, a heat-conducting through-hole 113 can be formed on the cavity wall of the accommodating cavity 13 at the location where the reflector 21 is positioned, so that the first heating cavity 111 and the accommodating cavity 13 can communicate through the heat-conducting through-hole 113. For example, the heat-conducting through-hole 113 can be set as a rectangular through-hole with a shape similar to that of the reflector 21, but the outline of the heat-conducting through-hole 113 is smaller than that of the reflector 21. The reflector 21 can be sealed and bonded to the cavity wall around the heat-conducting through-hole 113 by adhesive bonding, so as to block the heat-conducting through-hole 113 through the reflector 21 and form the first heating cavity 111 as a sealed cavity.

[0099] In the above embodiment, since a receiving cavity 13 is also provided between the cooling cavity 12 and the heating cavity 11, the receiving cavity 13 not only provides installation space for the optical component 2, but also allows the beam of the projected image to be transmitted within the receiving cavity 13, which helps to reduce the influence of dust and other contaminants on the beam of the projected image. Furthermore, by sealing at least a portion of the optical component 2 with the cavity wall at the edge of the heat-conducting through-hole 113, the liquid cooling medium can directly contact the optical component 2, thereby improving the efficiency of heat transfer from the liquid cooling medium to the optical component 2.

[0100] In some possible embodiments of this application, as shown in FIG3, the substrate 1 further has a receiving cavity 13, which is adjacent to the heating cavity 11 and the cooling cavity 12 respectively. A heat insulation member 7 is provided between the receiving cavity 13 and the cooling cavity 12. The heat insulation member 7 is used to block the heat generated by the imaging component 3 from being transferred to the receiving cavity 13. The heat insulation member 7 is light-transmitting.

[0101] In this embodiment, at least a portion of the optical component 2 is located within the accommodating cavity 13, which is adjacent to the cooling cavity 12. The heat generated by the imaging component 3 can also be transferred to the accommodating cavity 13. Therefore, a heat insulation member 7 can be provided between the cooling cavities 12 within the accommodating cavity 13 to block the transfer of heat from the cooling cavities 12 to the adjacent accommodating cavity 13.

[0102] For example, a through hole can be provided in the cavity wall between the receiving cavity 13 and the cooling cavity 12, and an optical lens 9 can be sealed in the through hole. The optical lens 9 can be made of flat glass. A heat insulation member 7 can be provided in the receiving cavity 13. For example, the heat insulation member 7 can be provided in the receiving cavity 13 near the end of the cooling cavity 12, so that the receiving cavity 13 is divided into a large chamber and a small chamber by the heat insulation member 7, with the small chamber near the cooling cavity 12. The heat insulation member 7 can be made of heat-insulating glass. In this way, the beam of the projected image formed by the imaging component 3 is transmitted sequentially through the flat glass and the heat-insulating glass to the large chamber of the receiving cavity 13, and then to the reflector 21 of the optical component 2.

[0103] In the above embodiment, since there is a light-transmitting heat insulation component 7 between the accommodating cavity 13 and the cooling cavity 12, not only can the beam of the projected image be transmitted to the optical component 2 through the heat insulation component 7, but the heat insulation component 7 can also block the heat generated by the imaging component 3 from being transferred to the accommodating cavity 13, thereby reducing the rate of temperature rise in the accommodating cavity 13. In this way, the rate of temperature rise in the accommodating cavity 13 can be slower than the rate of temperature rise in the optical component 2, which is beneficial to further reduce the possibility of water mist being generated on the optical component 2.

[0104] In some possible embodiments of this application, as shown in FIG3, the projection optical engine further includes an external cooling component 81, which is connected to the substrate 1 and at least communicates with the heating cavity 11. The liquid cooling medium circulates between the heating cavity 11 and the external cooling component 81, or the liquid cooling medium circulates between the heating cavity 11, the cooling cavity 12 and the external cooling component 81. The external cooling component 81 is used to dissipate heat from the liquid cooling medium.

[0105] In this embodiment, an external cooling component 81 can be provided in the projection optical engine to increase the heat dissipation speed of the liquid cooling medium. For example, the external cooling component 81 can adopt a structure including fins and guide tubes, and both the fins and guide tubes can be made of materials with good thermal conductivity, such as copper, aluminum, or alloys. The guide tube can be set into an approximately S-shaped structure, and the fins can be fixed to the outer wall of the guide tube to increase the surface area of ​​the guide tube. The external cooling component 81 can also adopt a structure of multiple heat dissipation pipes, and each heat dissipation pipe can be set into an approximately U-shaped structure.

[0106] For example, when the heating chamber 11 and the cooling chamber 12 are connected, both ends of the guide pipe or heat dissipation pipe can be connected to the heating chamber 11, or both ends of the guide pipe or heat dissipation pipe can be connected to the cooling chamber 12, or one end of the guide pipe or heat dissipation pipe can be connected to the heating chamber 11 and the other end to the cooling chamber 12. When the heating chamber 11 and the cooling chamber 12 are separated into independent chambers, both ends of the guide pipe or heat dissipation pipe can be connected to the heating chamber 11. In this way, the liquid cooling medium can also flow in the guide pipe or heat dissipation pipe, so that the heat absorbed by the liquid cooling medium can be dissipated more quickly to the environment around the projection optical engine through the guide pipe and fins, or so that the heat absorbed by the liquid cooling medium can be dissipated more quickly to the environment around the projection optical engine through the heat dissipation pipe.

[0107] In the above embodiments, since an external cooling component 81 is provided on the substrate 1 and is at least connected to the heating cavity 11, the liquid cooling medium can circulate between the heating cavity 11 and the external cooling component 81, or it can circulate between the heating cavity 11, the cooling cavity 12, and the external cooling component 81. This increases the surface area for heat dissipation of the liquid cooling medium through the external cooling component 81, thereby improving the efficiency of heat dissipation and cooling. Thus, after the projection optical engine has been operating for a period of time, if the temperature of the optical component 2 is higher than that of the liquid cooling medium due to irradiation by the light beam, the liquid cooling medium can simultaneously dissipate heat and cool both the imaging component 3 and the optical component 2.

[0108] In some possible embodiments of this application, as shown in Figures 1 and 3, the projection optical engine further includes a heat dissipation component 82, which is adjacent to the substrate 1. The substrate 1 is made of a thermally conductive material, and the heat dissipation component 82 is used to accelerate the airflow speed around the substrate 1.

[0109] In this embodiment, the heat dissipation efficiency of the liquid cooling medium can be increased by using the substrate 1. For example, the substrate 1 can be made of metal materials such as copper, aluminum, or alloys with good thermal conductivity, so that the heat absorbed by the liquid cooling medium from the imaging component 3 can be dissipated to the surrounding environment of the projection optical engine through the substrate 1.

[0110] For example, a heat dissipation component 82 can be installed near the base 1. The heat dissipation component 82 can be a fan, air compressor, etc. It can be fixed at a position corresponding to the cooling cavity 12, or it can be fixed at a position corresponding to the entire base 1. In this way, when the heat dissipation component 82 is working, it can blow out a high-velocity airflow. Driven by the airflow blown out by the heat dissipation component 82, the airflow speed around the cooling cavity 12 or around the base 1 increases.

[0111] In the above embodiments, since the substrate 1 is made of a thermally conductive material, it can absorb heat from the liquid cooling medium at a relatively fast rate. Furthermore, a heat dissipation component 82 is provided adjacent to the substrate 1, which can accelerate the airflow around the substrate 1, thereby improving the heat exchange efficiency between the substrate 1 and the surrounding air. Simultaneously, after the projection optical engine has been operating for a period of time, if the optical component 2 becomes hotter than the liquid cooling medium due to irradiation by the light beam, the liquid cooling medium can simultaneously dissipate heat from both the imaging component 3 and the optical component 2, thus improving the heat dissipation efficiency of the projection optical engine.

[0112] In some possible embodiments of this application, the outer wall of the substrate 1 has a first heat dissipation structure, and / or the heating cavity 11 has a second heat dissipation structure, and / or the cooling cavity 12 has a third heat dissipation structure, both of which extend into the liquid cooling medium.

[0113] In this embodiment of the application, when the substrate 1 is made of a thermally conductive material, the heat exchange efficiency between the liquid cooling medium and the substrate 1, and between the substrate 1 and the surrounding environment can be improved by increasing the surface area of ​​the substrate 1.

[0114] For example, a first heat dissipation structure can be provided on the outer wall of the substrate 1 to increase the surface area of ​​the outer wall of the substrate 1. For instance, heat dissipation fins, protrusions, grooves, etc., can be provided on the outer wall of the substrate 1 to increase the contact area between the outer wall of the substrate 1 and the surrounding air.

[0115] In another example, a second heat dissipation structure can be provided on the inner wall of the heating cavity 11 to increase the surface area of ​​the heating cavity 11. For example, heat dissipation fins and ridges can be provided on the inner wall of the heating cavity 11, and the heat dissipation fins and ridges can extend to at least the center of the heating cavity 11, so that there can be a larger contact area between the liquid cooling medium in the heating cavity 11 and the heating cavity 11.

[0116] In another example, a third heat dissipation structure can be provided on the inner wall of the cooling cavity 12 to increase the surface area of ​​the cooling cavity 12. For example, heat dissipation fins and heat exchange rods can be provided on the inner wall of the cooling cavity 12, and heat dissipation fins or heat exchange rods can be provided on opposite surfaces of the cooling cavity 12. The heat dissipation fins on the two opposite surfaces of the cooling cavity 12 are arranged alternately in sequence, so that there is a larger contact area between the liquid cooling medium in the cooling cavity 12 and the cooling cavity 12.

[0117] In the above embodiments, since the heating cavity 11 has a second heat dissipation structure and the cooling cavity 12 has a third heat dissipation structure, the contact area between the substrate 1 and the liquid cooling medium can be increased through the second and third heat dissipation structures, thereby accelerating the transfer of heat from the liquid cooling medium to the substrate 1. Furthermore, the outer wall of the substrate 1 has a first heat dissipation mechanism, which can increase the contact area between the substrate 1 and the surrounding air, thus improving the rate at which heat is dissipated from the substrate 1 to the surrounding air. Simultaneously, after the projection optical engine has been operating for a period of time, if the temperature of the optical component 2 exceeds that of the liquid cooling medium due to irradiation by the beam, the liquid cooling medium can simultaneously dissipate heat from both the imaging component 3 and the optical component 2, thereby improving the heat dissipation efficiency of the projection optical engine.

[0118] In some possible embodiments of this application, as shown in Figures 1 and 3, the projection optical engine further includes a thermoelectric cooler 83 (TEC), the cold end of which abuts against the cavity wall of the cooling cavity 12, or the cold end of the TEC is located inside the cooling cavity 12.

[0119] In this embodiment, a thermal tectonics device (TEC) can be installed in the projection optical engine to further accelerate the heat dissipation efficiency of the projection optical engine. For example, the TEC can be fixed to the substrate 1. When the substrate 1 is made of a thermally conductive material, the cold end of the TEC can be brought into contact with the outer wall of the cooling cavity 12 on the substrate 1, such as by bonding the cold end of the TEC to the outer wall of the cooling cavity 12 with thermally conductive adhesive. When the substrate 1 is made of a material such as plastic, a through hole matching the TEC can be provided on the wall of the cooling cavity 12, allowing the cold end of the TEC to pass through the through hole and be located inside the cooling cavity 12, while the hot end of the TEC is located outside the substrate 1.

[0120] In the above embodiments, since the cold end of the TEC is in contact with the cavity wall of the cooling chamber 12, or the cold end of the TEC is located inside the cooling chamber 12, the liquid cooling medium inside the cooling chamber 12 can be cooled down relatively quickly by the TEC. In this way, after the projection optical engine has been working for a period of time (the temperature of the optical component 2 rises), the temperature of the imaging component 3 can be better controlled by the TEC, so that the imaging component 3 is in a lower temperature working state.

[0121] In some possible embodiments of this application, the imaging component 3 includes a liquid crystal light valve (LCLV).

[0122] In this embodiment, the imaging component 3 can be an LCLV, which includes a liquid crystal layer, a polarizer, electrodes, and an optical system. Based on the electro-optic effect of liquid crystal materials, when an electric field is applied to the liquid crystal layer, the arrangement of liquid crystal molecules changes, thereby altering the refractive index of the liquid crystal layer. Therefore, by controlling the magnitude and direction of the electric field, precise control over the light transmittance and polarization state can be achieved, thus modulating the illumination beam into a beam containing the projected image. The LCLV can be encapsulated to give it good waterproof performance, allowing it to remain in a liquid cooling medium for extended periods.

[0123] In the above embodiments, since the imaging component 3 includes a liquid crystal light valve, a high-contrast and clear projected image can be formed through the liquid crystal light valve. Furthermore, the liquid cooling medium can dissipate heat from the liquid crystal light valve, which helps to keep the liquid crystal light valve in a lower operating temperature state, thereby enabling the projection optical engine to have higher brightness and improving the brightness of the projected image.

[0124] In addition, this application also provides a projection device, which includes a light source assembly and a projection optical engine provided in any of the above embodiments. The light source assembly and the imaging assembly 3 are arranged adjacent to each other, and the illumination beam generated by the light source assembly is transmitted to the imaging assembly 3.

[0125] In this embodiment, the light source assembly can generate an illumination beam. As shown in FIG2, an entrance aperture can be provided on the cavity wall of the cooling cavity 12 away from the receiving cavity 13, and the entrance aperture is sealed by an optical lens 9 with good light transmittance, such as a flat glass. The light source assembly can be positioned corresponding to the entrance aperture, so that the light source assembly is adjacent to the imaging assembly 3 in the projection optical engine, and the illumination beam generated by the light source assembly can be transmitted to the imaging assembly 3 through the optical lens 9.

[0126] The projection device provided in this application includes the projection optical engine provided in any of the above embodiments. Therefore, it can realize rapid heating of the optical component 2 in the projection optical engine and improve the heat dissipation efficiency of the projection optical engine. This is beneficial to keep the imaging component 3 in a lower working state, thereby improving the brightness of the projected image formed by the projection device.

[0127] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and all should be covered within the scope of the specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way.

Claims

1. A projection optical engine, characterized in that, include: The substrate (1) has a heating chamber (11) and a cooling chamber (12); An optical component (2) is disposed on the substrate (1), and at least a portion of the optical component (2) is connected to the cavity wall of the heating cavity (11); an imaging component (3) is disposed in the cooling cavity (12), and the imaging component (3) is used to form a projection image from the illumination beam transmitted to the imaging component (3), and the beam of the projection image is adjusted by the optical component (2) to form a projection screen; A liquid cooling medium is filled in the heating chamber (11) and the cooling chamber (12), and the liquid cooling medium is transparent; the heat generated by the imaging component (3) is transferred to the optical component (2) through the liquid cooling medium.

2. The projection optical engine according to claim 1, characterized in that, The heating chamber (11) and the cooling chamber (12) are connected.

3. The projection optical engine according to claim 1, characterized in that, There is an isolation member (5) between the heating chamber (11) and the cooling chamber (12), the isolation member (5) separates the heating chamber (11) and the cooling chamber (12) into two independent chambers, the isolation member (5) has thermal conductivity, and the heat of the liquid cooling medium in the cooling chamber (12) is transferred to the liquid cooling medium in the heating chamber (11) through the isolation member (5).

4. The projection optical engine according to claim 2 or 3, characterized in that, The heating chamber (11) and / or the cooling chamber (12) are provided with a disturbance mechanism (4) for driving the flow of the liquid cooling medium.

5. The projection optical engine according to claim 3, characterized in that, The isolation component (5) includes a first heat-conducting part (52) and a second heat-conducting part (53), the first heat-conducting part (52) being located in the cooling cavity (12) and the second heat-conducting part (53) being located in the heating cavity (11).

6. The projection optical engine according to claim 3 or 5, characterized in that, The isolation member (5) further includes a fixing part (54), which matches the imaging component (3) and the imaging component (3) is fixed to the fixing part (54).

7. The projection optical engine according to claim 3, characterized in that, It also includes a liquid flow pipe (6), which extends from the cooling chamber (12) through the isolation member (5) to the heating chamber (11). The inlet (61) and outlet (62) of the liquid flow pipe (6) are both located in the heating chamber (11). The liquid cooling medium located in the heating chamber (11) flows into the liquid flow pipe (6) from the inlet (61) and flows through the liquid flow pipe (6) back to the heating chamber (11) from the outlet (62).

8. The projection optical engine according to any one of claims 1 to 3, characterized in that, The heating cavity (11) includes a first heating cavity (111), and the optical component (2) includes a reflector (21). The reflector (21) is connected to the cavity wall of the first heating cavity (111), and the reflector (21) is used to reflect the light beam of the projected image.

9. The projection optical engine according to claim 8, characterized in that, The heating cavity (11) further includes a second heating cavity (112), and the optical component (2) further includes a lens (22). The lens (22) is connected to the cavity wall of the second heating cavity (112), and the beam of the projected image is transmitted to the lens (22) after being reflected by the reflector (21).

10. The projection optical engine according to any one of claims 1 to 3, characterized in that, The substrate (1) also has a receiving cavity (13), which is adjacent to the heating cavity (11) and the cooling cavity (12) respectively. At least a portion of the optical component (2) is located in the receiving cavity (13). The cavity wall between the receiving cavity (13) and the heating cavity (11) has a heat-conducting through hole (113). At least a portion of the optical component (2) is sealed to the edge of the heat-conducting through hole (113) of the cavity wall. The liquid cooling medium contacts at least a portion of the optical component (2) through the heat-conducting through hole (113).

11. The projection optical engine according to any one of claims 1 to 3, characterized in that, The substrate (1) also has a receiving cavity (13), which is adjacent to the heating cavity (11) and the cooling cavity (12) respectively. A heat insulation member (7) is provided between the receiving cavity (13) and the cooling cavity (12). The heat insulation member (7) is used to block the heat generated by the imaging component (3) from being transferred to the receiving cavity (13). The heat insulation member (7) is transparent.

12. The projection optical engine according to any one of claims 1 to 3, characterized in that, It also includes an external cooling assembly (81), which is connected to the base (1) and at least communicates with the heating chamber (11). The liquid cooling medium circulates between the heating chamber (11) and the external cooling assembly (81), or the liquid cooling medium circulates between the heating chamber (11), the cooling chamber (12) and the external cooling assembly (81). The external cooling assembly (81) is used to dissipate heat from the liquid cooling medium.

13. The projection optical engine according to any one of claims 1 to 3, characterized in that, It also includes a heat dissipation component (82) adjacent to the substrate (1), the substrate (1) being made of a thermally conductive material, and the heat dissipation component (82) being used to accelerate the airflow speed around the substrate (1).

14. The projection optical engine according to claim 13, characterized in that, The outer wall of the substrate (1) has a first heat dissipation structure, and / or the heating cavity (11) has a second heat dissipation structure, and / or the cooling cavity (12) has a third heat dissipation structure, wherein the second heat dissipation structure and the third heat dissipation structure both extend into the liquid cooling medium.

15. The projection optical engine according to any one of claims 1 to 3, characterized in that, It also includes a semiconductor cooler (83), the cold end of which abuts against the cavity wall of the cooling chamber (12), or the cold end of the semiconductor cooler (83) is located inside the cooling chamber (12).

16. The projection optical engine according to any one of claims 1 to 3, characterized in that, The imaging component (3) includes a liquid crystal light valve.

17. A projection device, characterized in that, include: Light source components; The projection optical engine according to any one of claims 1 to 16, wherein the light source assembly is disposed adjacent to the imaging assembly (3), and the illumination beam generated by the light source assembly is transmitted to the imaging assembly (3).

Images