Projection ray machine and projector

Abstract

The utility model relates to a projection light machine and a projector. The projection light machine comprises an optical assembly, and the optical assembly comprises a mounting frame, a first light-transmitting element, a first Fresnel lens, a second light-transmitting element, an LCD screen and a third light-transmitting element. A first cavity is defined by the first light-transmitting element, the first Fresnel lens and the mounting frame, a second cavity is defined by the second light-transmitting element, the LCD screen and the mounting frame, a third cavity is defined by the LCD screen, the third light-transmitting element and the mounting frame, and a fourth cavity is defined by the first Fresnel lens, the second light-transmitting element and the mounting frame. At least one of the first cavity, the second cavity, the third cavity and the fourth cavity is a liquid cooling cavity, and at least the other one of the first cavity, the second cavity, the third cavity and the fourth cavity is an air cooling cavity. The optical assembly can be well cooled in a mode of combining air cooling and liquid cooling, and the heat dissipation effect of the optical assembly can be improved.

Description

Technical Field

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

[0002] Projectors include optical components. To achieve higher brightness, projectors typically use high-power light sources. As the light emitted from the projector's light source passes through the optical components, some of the light cannot pass through, causing the optical components to heat up. Therefore, heat dissipation measures are necessary for the optical components. However, the heat dissipation effect of the optical components in current projector technologies is relatively poor. Utility Model Content

[0003] Therefore, it is necessary to provide a projection optical engine and projector that can improve the heat dissipation effect of optical components to address the above-mentioned technical problems.

[0004] According to a first aspect of this application, a projection optical engine is provided, including an optical component, the optical component comprising:

[0005] Mounting frame; and

[0006] A first light-transmitting element, a first Fresnel lens, a second light-transmitting element, an LCD screen, and a third light-transmitting element are arranged at intervals along a first direction on the inner periphery of the mounting frame;

[0007] The first light-transmitting element, the first Fresnel lens, and the mounting frame enclose a first cavity.

[0008] The second light-transmitting element, the LCD screen, and the mounting frame enclose a second cavity;

[0009] The LCD screen, the third light-transmitting element, and the mounting frame enclose a third cavity;

[0010] The first Fresnel lens, the second light-transmitting element, and the mounting frame enclose a fourth cavity;

[0011] At least one of the first cavity, the second cavity, the third cavity, and the fourth cavity is a liquid-cooled cavity, and at least another of the first cavity, the second cavity, the third cavity, and the fourth cavity is an air-cooled cavity.

[0012] In one embodiment, one of the first cavity, the second cavity, the third cavity, and the fourth cavity is an air-cooled cavity, and the other three of the first cavity, the second cavity, the third cavity, and the fourth cavity are liquid-cooled cavities.

[0013] In one embodiment, the first cavity, the second cavity, and the third cavity are all liquid-cooled cavities;

[0014] The fourth cavity is an air-cooled cavity;

[0015] The first cavity, the second cavity, and the third cavity are connected in series and / or in parallel.

[0016] In one embodiment, the optical component further includes a seal;

[0017] The sealing element is provided between the first light-transmitting element and the mounting frame; and / or

[0018] The sealing element is provided between the first Fresnel lens and the mounting frame; and / or

[0019] The sealing element is provided between the second light-transmitting element and the mounting frame; and / or

[0020] The sealing element is provided between the third light-transmitting element and the mounting frame; and / or

[0021] The mounting frame includes a first frame and a second frame that are detachably connected along the first direction; the LCD screen is disposed between the first frame and the second frame; and the sealing element is provided between the first frame and the second frame.

[0022] In one embodiment, the projection optical engine further includes:

[0023] Pump;

[0024] The housing has a receiving cavity for containing coolant; and

[0025] Cooler;

[0026] All of the liquid cooling chambers are connected to the receiving chamber by means of the pump and the cooler.

[0027] In one embodiment, the projection optical engine further includes:

[0028] An optical engine mounting base is at least partially disposed on one side of the optical component along the first direction; the optical engine mounting base has a first mounting cavity, and the optical engine mounting base is provided with a first air outlet and a first air return outlet respectively connected to the first mounting cavity; the air-cooling cavity is respectively connected to the first air outlet and the first air return outlet.

[0029] The first fan is located inside the first mounting cavity.

[0030] In one embodiment, the optomechanical mounting base includes:

[0031] The optical engine housing is located on one side of the optical component along the first direction;

[0032] The first air guide and the second air guide are detachably connected to opposite sides of the optical engine housing along the second direction, and to opposite sides of the mounting frame along the second direction;

[0033] The first mounting cavity is formed within the first air guide member;

[0034] The first air outlet is located on the first air guide;

[0035] The first return air inlet is located on the second air guide component;

[0036] The first direction and the second direction intersect each other.

[0037] In one embodiment, the optical engine housing has a second mounting cavity, which is connected to the first mounting cavity and the first return air vent, respectively; the projection optical engine further includes:

[0038] A reflector, disposed within the second mounting cavity and located on the light-emitting side of the optical component; and

[0039] The lens is located on the light-emitting side of the reflector;

[0040] The lens is mounted on the optical engine mount and extends at least partially into the second mounting cavity.

[0041] In one embodiment, the first air guide is further provided with a second air outlet, which is connected to the first mounting cavity and the second mounting cavity respectively.

[0042] According to a second aspect of this application, a projector is provided, including the projection optical engine of any of the above embodiments.

[0043] In the technical solution of this application, the coolant flowing into the liquid cooling cavity can be used to dissipate heat from the optical components, and the gas flowing into the air cooling cavity can also be used to carry away the heat from the optical components. In this way, the combination of air cooling and liquid cooling can be used to effectively dissipate heat from the optical components, thereby improving the heat dissipation effect of the optical components. Attached Figure Description

[0044] Figure 1 A schematic diagram of the projection optical engine in one embodiment of this application is shown.

[0045] Figure 2 A schematic cross-sectional view of the projection optical engine in a vertical third direction is shown in one embodiment of this application.

[0046] Figure 3 It shows Figure 2 An enlarged schematic diagram of point I.

[0047] Figure 4 A schematic diagram of a partial structure of a projection optical engine according to an embodiment of this application is shown from a certain perspective.

[0048] Figure 5 A schematic diagram of a portion of the projection optical engine according to an embodiment of this application is shown from another perspective.

[0049] Figure 6 It shows Figure 7 A schematic cross-sectional view of the partial structure of the projection optical engine at point BB.

[0050] Figure 7 It shows Figure 6 A schematic cross-sectional view of section AA of the partial structure of the projection optical engine shown.

[0051] Figure 8 A schematic diagram of the structure of the first air guide component according to an embodiment of this application is shown.

[0052] Figure 9 A schematic diagram of the structure of the first air guide and the first fan according to an embodiment of this application is shown.

[0053] Figure 10 A schematic diagram of the structure of the top cover according to an embodiment of this application is shown.

[0054] Figure 11 It shows Figure 7 A schematic cross-sectional view of the partial structure of the projection optical engine at point C.

[0055] Figure 12 It shows Figure 11 A schematic cross-sectional view of the DD section of the partial structure of the projection optical engine shown.

[0056] Figure 13 A schematic diagram of the structure of the second air guide component according to an embodiment of this application is shown.

[0057] Figure 14 A schematic diagram of the bottom shell of an embodiment of this application is shown.

[0058] Figure 15 A schematic cross-sectional view of a projection optical engine according to an embodiment of this application is shown in the vertical second direction.

[0059] Reference numerals: 10, Projection engine; 100, Optical assembly; 110, Mounting frame; 111, First frame; 112, Second frame; 113, Third frame; 1131, Second mounting plane; G1, First air vent; 1132, Fourth mounting plane; G2, Second air vent; 114, Fourth frame; 115, Fifth frame; 116, Sixth frame; 120, First light-transmitting element; 130, First Fresnel lens; 140, Second light-transmitting element; 150, LCD screen; 160, Third light-transmitting element; 170, Second Fresnel lens Mirror; 181, First seal; 182, Second seal; 183, Light source; 184, Focusing rod; 191, First connector; 192, Second connector; 193, Third connector; Q1, First cavity; Q2, Second cavity; Q3, Third cavity; Q4, Fourth cavity; 200, Optical engine mounting base; 210, Optical engine housing; 211, Bottom shell; 2111, Limiting groove; 2112, First limiting element; 2113, Second limiting element; 2114, Third limiting element; 2115, Mounting hole; Z2, Second mounting cavity; 212, Top cover; K1, First Opening; L1, First connecting hole; K2, First slot; K3, Second opening; K4, Second slot; 220, First air guide; C1, First air outlet; C2, Second air outlet; C3, Third air outlet; Z1, First mounting cavity; L2, Second connecting hole; 221, First air guide section; 222, Second air guide section; 2221, First mounting plane; 223, Third air guide section; D1, First air duct; L3, Third connecting hole; 230, Second air guide; 231, Third mounting plane; H1, First return air outlet; H2, Second return air outlet; L 4. Fifth connecting hole; L5. Sixth connecting hole; D2. Second air duct; 300. First fan; 400. Reflector; 500. Lens; 610. Pump; 611. First inlet; 612. First outlet; 620. Housing; 630. Cooler; 640. Mounting bracket; 710. First radiator; 720. Second radiator; 721. Heat dissipation body; 7211. First heat dissipation fins; 722. Metal tube; 730. Second fan; 740. Third fan; 810. Focusing rod bracket; 811. Inclined surface; 820. Light source bracket. Detailed Implementation

[0060] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0061] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0062] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0064] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0066] Figure 1 A schematic diagram of the projection optical engine 10 in one embodiment of this application is shown. Figure 2 A cross-sectional schematic diagram of the projection optical engine 10 according to an embodiment of this application is shown. Figure 3 It shows Figure 2 An enlarged schematic diagram of point I.

[0067] Please refer to the following: Figures 1-3 One embodiment of this application provides a projection optical engine 10, including an optical assembly 100. The optical assembly 100 includes a mounting frame 110, a first light-transmitting element 120, a first Fresnel lens 130, a second light-transmitting element 140, an LCD screen 150, and a third light-transmitting element 160. The first light-transmitting element 120, the first Fresnel lens 130, the second light-transmitting element 140, the LCD screen 150, and the third light-transmitting element 160 are arranged at intervals along a first direction F1 on the inner periphery of the mounting frame 110.

[0068] The first light-transmitting element 120, the first Fresnel lens 130, and the mounting frame 110 enclose a first cavity Q1; the second light-transmitting element 140, the LCD screen 150, and the mounting frame 110 enclose a second cavity Q2; the LCD screen 150, the third light-transmitting element 160, and the mounting frame 110 enclose a third cavity Q3; and the first Fresnel lens 130, the second light-transmitting element 140, and the mounting frame 110 enclose a fourth cavity Q4. At least one of the first cavity Q1, the second cavity Q2, the third cavity Q3, and the fourth cavity Q4 is a liquid-cooled cavity, and at least another of the first cavity Q1, the second cavity Q2, the third cavity Q3, and the fourth cavity Q4 is an air-cooled cavity.

[0069] The optical component 100 can be cooled by the coolant flowing into the liquid cooling cavity, and the heat of the optical component 100 can also be carried away by the gas flowing into the air cooling cavity. In this way, the optical component 100 can be cooled effectively by combining air cooling and liquid cooling, thereby improving the heat dissipation effect of the optical component 100.

[0070] In some embodiments, one of the first cavity Q1, the second cavity Q2, the third cavity Q3, and the fourth cavity Q4 is an air-cooled cavity, and the other three of the first cavity Q1, the second cavity Q2, the third cavity Q3, and the fourth cavity Q4 are liquid-cooled cavities.

[0071] It is possible that the first cavity Q1 is an air-cooled cavity, and the second cavity Q2, the third cavity Q3, and the fourth cavity Q4 are liquid-cooled cavities.

[0072] Alternatively, the second cavity Q2 can be an air-cooled cavity, while the first cavity Q1, the third cavity Q3, and the fourth cavity Q4 can be liquid-cooled cavities.

[0073] Alternatively, the third cavity Q3 can be an air-cooled cavity, while the first cavity Q1, the second cavity Q2, and the fourth cavity Q4 can be liquid-cooled cavities.

[0074] Alternatively, the fourth cavity Q4 could be an air-cooled cavity, while the first cavity Q1, the second cavity Q2, and the third cavity Q3 could be liquid-cooled cavities. No specific restrictions are imposed here.

[0075] Thus, compared to air cooling, liquid cooling has a better heat dissipation effect. By setting one of the first cavity Q1, the second cavity Q2, the third cavity Q3, and the fourth cavity Q4 as an air-cooled cavity, and the other three of the first cavity Q1, the second cavity Q2, the third cavity Q3, and the fourth cavity Q4 as liquid-cooled cavities, the optical component 100 can be cooled by a combination of air cooling and liquid cooling, while also allowing the optical component 100 to come into contact with the coolant in the three liquid-cooled cavities, thereby improving the heat dissipation effect of the optical component 100.

[0076] In some embodiments, the first cavity Q1, the second cavity Q2, and the third cavity Q3 are all liquid-cooled cavities, and the fourth cavity Q4 is an air-cooled cavity, wherein the first cavity Q1, the second cavity Q2, and the third cavity Q3 are connected in series and / or in parallel.

[0077] The coolant flowing into the first cavity Q1 can be used to dissipate heat from the first light-transmitting element 120 and the first Fresnel lens 130. The coolant flowing into the second cavity Q2 can also be used to dissipate heat from the second light-transmitting element 140 and the LCD screen 150. The coolant flowing into the third cavity Q3 can also be used to dissipate heat from the LCD screen 150 and the third light-transmitting element 160. In addition, the gas flowing into the fourth cavity Q4 can carry away the heat from the first Fresnel lens 130 and the second light-transmitting element 140. In this way, the optical component 100 can be effectively cooled.

[0078] In addition, the first cavity Q1, the second cavity Q2 and the third cavity Q3 can be connected in series and / or in parallel as needed, so as to effectively dissipate heat from the first light-transmitting element 120, the first Fresnel lens 130, the second light-transmitting element 140, the LCD screen 150 and the third light-transmitting element 160, thereby improving the heat dissipation effect of the optical assembly 100.

[0079] Optionally, the first light-transmitting element 120, the second light-transmitting element 140, and the third light-transmitting element 160 may all be sealed glass. For example, the first light-transmitting element 120, the second light-transmitting element 140, and the third light-transmitting element 160 are respectively the first sealed glass, the second sealed glass, and the third sealed glass.

[0080] In some embodiments, the projection optical engine 10 further includes an optical engine mounting base 200 and a first fan 300. The optical engine mounting base 200 is at least partially disposed on one side of the optical component 100 along the first direction F1, and the optical engine mounting base 200 has a first mounting cavity Z1. The first fan 300 is disposed in the first mounting cavity Z1. The optical engine mounting base 200 is provided with a first air outlet C1 and a first air return outlet H1 that are respectively connected to the first mounting cavity Z1. The air-cooling cavity is respectively connected to the first air outlet C1 and the first air return outlet H1.

[0081] The first fan 300 can be used to allow air in the first mounting cavity Z1 to flow into the air-cooled cavity through the first air outlet C1, and then into the first mounting cavity Z1 through the first air return outlet H1. This creates a circulating airflow within the first mounting cavity Z1 and the air-cooled cavity. During this process, the circulating airflow can be used to dissipate heat from the two optical devices surrounding the air-cooled cavity. For example, the fourth cavity Q4 is the air-cooled cavity, and the two optical devices are the first Fresnel lens 130 and the second light-transmitting element 140, respectively. Thus, the first fan 300 can be used to cool the Fresnel surface of the first Fresnel lens 130, improving the heat dissipation problem of the first Fresnel lens 130.

[0082] In some embodiments, please refer to Figures 4-8 The optical engine mounting base 200 includes an optical engine housing 210, a first air guide 220, and a second air guide 230. The optical engine housing 210 is located on one side of the optical component 100 along a first direction F1. The first air guide 220 and the second air guide 230 are detachably connected to opposite sides of the optical engine housing 210 along a second direction F2, and the first air guide 220 and the second air guide 230 are connected to opposite sides of the mounting frame 110 along the second direction F2. A first mounting cavity Z1 is formed within the first air guide 220, a first air outlet C1 is located on the first air guide 220, and a first return air outlet H1 is located on the second air guide 230. The first direction F1 and the second direction F2 intersect each other.

[0083] Please refer to the following: Figure 8 and Figure 9 The first fan 300 is completely housed in the first mounting cavity Z1.

[0084] Driven by the first fan 300, the air in the first mounting cavity Z1 flows into the air-cooling cavity through the first air guide 220, and then flows back into the first mounting cavity Z1 through the second air guide 230. In this way, a circulating airflow can be formed in the first mounting cavity Z1 and the air-cooling cavity, and the circulating airflow can be used to dissipate heat from the two optical devices surrounding the air-cooling cavity.

[0085] In some embodiments, the optical engine housing 210 has a second mounting cavity Z2, which is connected to the first mounting cavity Z1 and the first return air vent H1. The projection optical engine 10 also includes a reflector 400 and a lens 500. The reflector 400 is disposed in the second mounting cavity Z2 and is located on the light-emitting side of the optical component 100. The lens 500 is located on the light-emitting side of the reflector 400, passes through the optical engine mounting base 200, and at least partially extends into the second mounting cavity Z2.

[0086] Thus, the light emitted from the optical component 100 can be reflected by the reflector 400 onto the lens 500. This light can then be emitted outward through the lens 500 and projected onto the projection screen to achieve image projection. Furthermore, during the operation of the projection optical engine 10 of this application, the first fan 300 can be used to draw air from the first mounting cavity Z1 into the cooling cavity, then through the cooling cavity into the second mounting cavity Z2, and finally back into the first mounting cavity Z1. This creates a circulating airflow within the first mounting cavity Z1, the cooling cavity, and the second mounting cavity Z2. During this process, the circulating airflow can dissipate heat from the two optical components surrounding the cooling cavity. It can also accelerate the evaporation rate of liquid on the surfaces of the reflector 400 and the lens 500, preventing water droplets from condensing on their surfaces, thereby effectively preventing fogging and improving the image quality projected by the projection optical engine 10.

[0087] Optionally, the optical engine housing 210 includes a bottom shell 211 and a top cover 212 detachably connected to one side of the bottom shell 211 along the second direction F2. The bottom shell 211 and the top cover 212 enclose a second mounting cavity Z2. Please refer to the relevant documentation. Figure 6 and Figure 10 The upper cover 212 is provided with a first opening K1, which is connected to the first mounting cavity Z1 and the second mounting cavity Z2 respectively.

[0088] Optionally, the optical engine housing 210 also includes a plurality of first connectors, such as Figure 10 As shown, the upper cover 212 is provided with a plurality of first connecting holes L1 spaced around the first opening K1 and adapted to the first connecting member, such as... Figure 8As shown, the first air guide 220 is provided with a plurality of second connecting holes L2 corresponding to a plurality of first connecting holes L1. The first connector is inserted into the corresponding first connecting hole L1 and second connecting hole L2 so that the first air guide 220 is detachably connected to the optical engine housing 210. For example, the first connector is a bolt, and the first connecting hole L1 and the second connecting hole L2 are both threaded holes adapted to the bolt.

[0089] Optionally, the top cover 212 can be bolted to one side of the bottom shell 211 along the second direction F2.

[0090] Optionally, the first direction F1 and the second direction F2 are perpendicular to each other. For example, the first direction F1 is parallel to the thickness direction of the mounting frame 110, and the second direction F2 is parallel to the width direction of the mounting frame 110.

[0091] This facilitates the connection of the first air guide 220 to the optical engine housing 210 and the mounting frame 110, and also facilitates the connection between the first mounting cavity Z1 in the first air guide 220 and the second mounting cavity Z2 in the optical engine housing 210. It also facilitates the connection between the first air outlet C1 on the first air guide 220 and the air-cooling cavity, thereby better forming a circulating airflow in the first mounting cavity Z1, the air-cooling cavity and the second mounting cavity Z2.

[0092] In some embodiments, please refer to Figure 8 and Figure 11 The first air guide 220 is also provided with a second air outlet C2, which is connected to the first mounting cavity Z1 and the second mounting cavity Z2 respectively.

[0093] In this way, a portion of the air in the first mounting cavity Z1 can flow into the air-cooling cavity and the second mounting cavity Z2 sequentially through the first air outlet C1; another portion of the air in the first mounting cavity Z1 can flow into the second mounting cavity Z2 through the second air outlet C2. Both portions of air can flow back into the first mounting cavity Z1 through the first opening K1. This creates a circulating airflow, which can better prevent water droplets from condensing on the surfaces of the reflector 400 and the lens 500, thus effectively preventing fogging and improving the image quality projected by the projection engine 10.

[0094] In some embodiments, the first air outlet C1 extends along the first direction F1.

[0095] Since the first air outlet C1 extends along the first direction F1, it is convenient to guide the air in the first mounting cavity Z1 to flow into the air-cooling cavity located on the side of the optical engine housing 210 along the first direction F1.

[0096] In some embodiments, the second air outlet C2 extends along the second direction F2.

[0097] Since the second air outlet C2 extends along the second direction F2, it facilitates the flow of air from the first mounting cavity Z1 to the second mounting cavity Z2 located on the side of the first air guide 220 along the second direction F2. This allows for better utilization of the circulating airflow to remove water droplets condensed on the surfaces of the reflector 400 and lens 500, thereby effectively preventing fogging and improving the image quality projected by the projection engine 10.

[0098] In some embodiments, the first air guide 220 includes a first air guide portion 221 and a second air guide portion 222 connected along a first direction F1. A first slot K2 is provided on one side of the optical engine housing 210 along a second direction F2. At least a portion of the first air guide portion 221 is adaptedly disposed within the first slot K2, and the first air guide portion 221 is detachably connected to one side of the optical engine housing 210 along the second direction F2. A first air outlet C1 is formed on the first air guide portion 221. The second air guide portion 222 is detachably connected to one side of the mounting frame 110 along the second direction F2, and a third air outlet C3 is provided on the second air guide portion 222. The third air outlet C3 communicates with both the first air outlet C1 and the air-cooling cavity.

[0099] In this embodiment, the second air outlet C2 is also formed on the first air guide 221.

[0100] In this embodiment, the first card slot K2 is provided on the upper cover 212, the first card slot K2 is arranged around the first opening K1, and a plurality of first connecting holes L1 are arranged at intervals around the first card slot K2.

[0101] The first air guide 221 is detachably connected to one side of the optical engine housing 210 along the second direction F2, and the second air guide 222 is detachably connected to one side of the mounting frame 110 along the second direction F2. This facilitates the assembly and disassembly of the first air guide 220, the optical engine housing 210, and the mounting frame 110. Since at least part of the first air guide 221 is adapted to be located in the first slot K2, it helps to improve the tightness of the connection between the first air guide 221 and the optical engine housing 210. This can improve the sealing performance of the first mounting cavity Z1 and the second mounting cavity Z2. While the airflow circulates in the first mounting cavity Z1, the second mounting cavity Z2, and the air-cooling cavity, it can also effectively reduce the probability of dust and other external environmental particles entering the first mounting cavity Z1, the second mounting cavity Z2, and the air-cooling cavity.

[0102] In some embodiments, the second air guide 222 has a first mounting plane 2221 at one end where the third air outlet C3 is located, and the third air outlet C3 is disposed through the first mounting plane 2221. The mounting frame 110 has a second mounting plane 1131 on one side along the second direction F2, which is opposite to and detachably connected to the first mounting plane 2221. The mounting frame 110 has a first air passage G1 that extends from the inner wall of the mounting frame 110 to the second mounting plane 1131. The first air passage G1 is connected to the third air outlet C3 and the air-cooling cavity respectively.

[0103] The second air guide section 222 is provided with a third connecting hole L3, and the mounting frame 110 is provided with a fourth connecting hole corresponding to the third connecting hole L3. The second air guide section 222 and the mounting frame 110 are detachably connected by means of the third connecting hole L3 and the fourth connecting hole.

[0104] Optionally, such as Figure 12 As shown, the mounting frame 110 has multiple first air vents G1 spaced apart on one side along the second direction F2. Each first air vent G1 is connected to the first mounting cavity Z1 and the air-cooling cavity, respectively. The multiple first air vents G1 allow airflow to enter the air-cooling cavity more evenly, improving the heat dissipation effect and reducing the impact of airflow changes on the projection quality.

[0105] Optionally, multiple first air vents G1 are arranged at intervals along a third direction F3. The first direction F1, the second direction F2, and the third direction F3 intersect each other. Specifically, the first direction F1, the second direction F2, and the third direction F3 are perpendicular to each other. The first direction F1 is parallel to the thickness direction of the mounting frame 110, the second direction F2 is parallel to the width direction of the mounting frame 110, and the third direction F3 is parallel to the length direction of the mounting frame 110.

[0106] The mounting frame 110 includes a third frame 113, with a first air vent G1 and a second mounting plane 1131 disposed on the third frame 113.

[0107] Since the first mounting plane 2221 and the second mounting plane 1131 are arranged opposite to each other and detachably connected, the end of the second air guide 222 with the third air outlet C3 can be tightly connected to the second mounting plane 1131 of the mounting frame 110, which helps to improve the sealing performance between the third air outlet C3 and the first air outlet G1, and thus can effectively reduce the probability of dust and other external environmental particles entering the first mounting cavity Z1, the second mounting cavity Z2 and the air-cooling cavity.

[0108] In some embodiments, the first air guide 220 includes a third air guide 223 connected along a first direction F1 between the first air guide portion 221 and the second air guide portion 222. The third air guide 223 has a first air duct D1, which communicates between the first air outlet C1 and the third air outlet C3. The third air guide 223 extends in a curved manner from the side near the first air guide portion 221 to the side near the second air guide portion 222.

[0109] In this way, the first mounting cavity Z1 can be sequentially connected to the first air outlet C1, the first air duct D1, the third air outlet C3 and the air-cooling cavity. The first air guide 220 can be used to connect the first mounting cavity Z1 and the air-cooling cavity. At the same time, it is also beneficial for the first air guide part 221 of the first air guide 220 to be tightly connected to the side of the optical engine housing 210 along the second direction F2. It is also beneficial for the second air guide part 222 of the first air guide 220 to be tightly connected to the side of the mounting frame 110 along the second direction F2. The third air guide part 223 can also be used to improve the strength of the first air guide 220.

[0110] In some embodiments, please refer to Figure 5 , Figure 6 and Figure 13 The second air guide 230 is detachably connected to the optical engine housing 210 and the mounting frame 110 on the side away from the first air guide 220 along the second direction F2.

[0111] Optionally, the optical engine housing 210 is provided with a second opening K3 on the side away from the first air guide 220, and the second opening K3 is connected to the second mounting cavity Z2 and the first return air outlet H1 respectively.

[0112] Specifically, the second opening K3 is located on the side of the bottom shell 211 away from the top cover 212.

[0113] The second air guide 230 can be connected to the side of the optical engine housing 210 and the mounting frame 110 away from the first air guide 220 along the second direction F2, which facilitates the disassembly or replacement of the second air guide 230. At the same time, the second air guide 230 can be used to connect the second mounting cavity Z2 and the air-cooling cavity, which facilitates the airflow to circulate in the first mounting cavity Z1, the second mounting cavity Z2 and the air-cooling cavity.

[0114] The optical engine housing 210 is provided with a second slot K4 on the side away from the first air guide 220 along the second direction F2. The end of the second air guide 230 where the first return air port H1 is located is adapted to the second slot K4 and is located in the second slot K4.

[0115] The bottom shell 211 has a second slot K4 on the side opposite to the top cover 212. The second slot K4 can be arranged around the second opening K3.

[0116] In this way, the end of the second air guide 230 with the first return air port H1 can be tightly connected to the side of the optical engine housing 210 away from the first air guide 220 along the second direction F2, which is beneficial to improving the sealing of the second mounting cavity Z2 and thus reducing the probability of dust and other external environmental elements entering the second mounting cavity Z2.

[0117] In some embodiments, the second air guide 230 has a third mounting plane 231, and the second air guide 230 is further provided with a second return air inlet H2 that penetrates the third mounting plane 231. The second return air inlet H2 is connected to the first return air inlet H1 and the air-cooled cavity respectively. The mounting frame 110 is provided with a fourth mounting plane 1132 that is opposite to and parallel to the third mounting plane 231, and the third mounting plane 231 is detachably connected to the fourth mounting plane 1132.

[0118] Optionally, the mounting frame 110 has a plurality of second air inlets G2 spaced apart on the other side along the second direction F2, each second air inlet G2 being connected to the second mounting cavity Z2 and the air-cooling cavity respectively. Specifically, each second air inlet G2 is connected to the second return air inlet H2 and the air-cooling cavity respectively, thereby making each second air inlet G2 connected to the second mounting cavity Z2 and the air-cooling cavity respectively.

[0119] The second air vent G2 can penetrate from the inner wall of the air-cooled cavity to the fourth mounting plane 1132.

[0120] Optionally, multiple second air vents G2 are arranged at intervals along the third direction F3.

[0121] Optionally, the second air guide 230 is provided with a second air duct D2 that connects the first return air inlet H1 and the second return air inlet H2.

[0122] Specifically, the mounting frame 110 includes a third frame 113, with a second air vent G2 and a fourth mounting plane 1132 disposed on the third frame 113.

[0123] Specifically, the second air guide 230 is provided with a fifth connecting hole L4 and a sixth connecting hole L5, the bottom shell 211 of the optical engine housing 210 is provided with a seventh connecting hole corresponding to the fifth connecting hole L4, and the mounting frame 110 is provided with an eighth connecting hole corresponding to the sixth connecting hole L5. The second air guide 230 and the bottom shell 211 of the optical engine housing 210 are detachably connected by the fifth connecting hole L4 and the corresponding seventh connecting hole, and the second air guide 230 and the mounting frame 110 are detachably connected by the sixth connecting hole L5 and the corresponding eighth connecting hole. Optionally, the fifth connecting hole L4, the sixth connecting hole L5, the seventh connecting hole, and the eighth connecting hole are all threaded holes.

[0124] In some embodiments, the optical assembly 100 further includes a seal, which may be provided between the first light-transmitting element 120 and the mounting frame 110; or between the first Fresnel lens 130 and the mounting frame 110; or between the second light-transmitting element 140 and the mounting frame 110; or between the third light-transmitting element 160 and the mounting frame 110. The seal may be a first seal 181 or a second seal 182, where the first seal 181 may be a sealing ring and the second seal 182 may be an annular sealing gasket.

[0125] Of course, this application is not limited to this. It can also be that the mounting frame 110 includes a first frame 111 and a second frame 112 detachably connected along a first direction F1, and the LCD screen 150 is located between the first frame 111 and the second frame 112 along the first direction F1. A sealing element is provided between the first frame 111 and the second frame 112.

[0126] Specifically, the first frame 111 and the second frame 112 can be connected by bolts. The first frame 111 has a first sealing groove on the side facing the second frame 112, and a first sealing element 181 is provided in the first sealing groove. The second frame 112 has a second sealing groove on the side facing the first frame 111, and another first sealing element 181 is provided in the second sealing groove.

[0127] The mounting frame 110 also includes a third frame 113, which is detachably connected to the side of the second frame 112 opposite to the first frame 111. The second light-transmitting element 140 is located between the second frame 112 and the third frame 113. Alternatively, a second seal 182 may be provided between the second light-transmitting element 140 and the third frame 113, and another second seal 182 may be provided between the first Fresnel lens 130 and the third frame 113.

[0128] Specifically, the mounting frame 110 may further include a fourth frame 114, which is detachably connected to the side of the third frame 113 facing away from the second frame 112. The first Fresnel lens 130 is located between the third frame 113 and the fourth frame 114. Alternatively, a first sealing element 181 may be provided between the first Fresnel lens 130 and the fourth frame 114. Specifically, the fourth frame 114 has a third sealing groove on the side facing the third frame 113, and the first sealing element 181 is provided in the second sealing groove.

[0129] The mounting frame 110 may also include a fifth frame 115, which is detachably connected to the fourth frame 114 on the side opposite to the third frame 113, and the first light-transmitting element 120 is located between the fourth frame 114 and the fifth frame 115.

[0130] Alternatively, the fourth frame 114 may have a fourth sealing groove on the side facing the fifth frame 115, and a first sealing element 181 may be provided in the fourth sealing groove. The first sealing element 181 is located between the fourth frame 114 and the first light-transmitting element 120.

[0131] Alternatively, a second sealing element 182 may be provided between the first light-transmitting element 120 and the fifth frame 115.

[0132] The mounting frame 110 may also include a sixth frame 116, a fifth frame 115 detachably connected to the side of the first frame 111 opposite to the second frame 112, and a first light-transmitting element 120 located between the fourth frame 114 and the fifth frame 115.

[0133] Alternatively, the first frame 111 may have a fifth sealing groove on the side facing the sixth frame 116, and a first sealing element 181 may be provided in the fifth sealing groove, which is located between the first frame 111 and the third light-transmitting element 160.

[0134] Alternatively, a second sealing element 182 may be provided between the third light-transmitting element 160 and the sixth frame 116.

[0135] Alternatively, the second frame 112 may have a sixth sealing groove on the side facing the third frame 113, and a first sealing element 181 may be provided in the sixth sealing groove, which is located between the second frame 112 and the second light-transmitting element 140.

[0136] Optionally, the optical assembly 100 also includes a second Fresnel lens 170 along the first direction F1, the second Fresnel lens 170 being located on the side of the third light-transmitting element 160 away from the LCD screen 150, and being confined between the sixth frame 116 and the optical engine mounting base 200.

[0137] In some embodiments, please refer to Figure 12 and Figure 14 The bottom shell 211 is provided with a limiting groove 2111, and the reflector 400 is limited in the limiting groove 2111. The reflector 400 extends along the fourth direction, which is set at an angle to the first direction F1 and the third direction F3 respectively.

[0138] In this way, the light emitted from the optical component 100 can be effectively reflected to the lens 500 using the reflector 400.

[0139] The bottom shell 211 may include a first limiting member 2112, a plurality of second limiting members 2113 and a plurality of third limiting members 2114 arranged at intervals around the outer periphery of the first limiting member 2112. The first limiting member 2112, the plurality of second limiting members 2113 and the plurality of third limiting members 2114 define a limiting groove 2111. The second limiting members 2113 are used to support the reflector 400, and the third limiting members 2114 are used to restrict the reflector 400 from disengaging from the limiting groove 2111 along the axial direction of the limiting groove 2111.

[0140] In this way, the reflector 400 can be stably installed in the limiting groove 2111.

[0141] In some embodiments, the second mounting cavity Z2 is formed in the bottom shell 211, and the bottom shell 211 is also provided with a mounting hole 2115 communicating with the second mounting cavity Z2, and the lens 500 is embedded in the mounting hole 2115.

[0142] In some embodiments, please refer to Figure 1 , Figure 2 and Figure 15 The projection engine 10 also includes a pump 610, a housing 620, and a cooler 630. The housing 620 has a receiving cavity for containing coolant, and all liquid cooling cavities are connected to the receiving cavity by means of the pump 610 and the cooler 630.

[0143] The coolant flowing out of the liquid cooling chamber can be cooled by the cooler 630, and the cooled coolant can be stored in the housing 620. Then, the coolant is pumped to the liquid cooling chamber by the pump 610. In this way, the coolant can be circulated and supplied to the liquid cooling chamber, thereby improving the heat dissipation effect of the optical component 100.

[0144] Specifically, the pump 610 has a first inlet 611 and a first outlet 612 that are connected to each other, the cooler 630 has a second inlet and a second outlet that are connected to each other, the outlet end of all liquid cooling chambers is connected to the second inlet of the cooler 630, the second outlet of the cooler 630 is connected to the receiving chamber, the receiving chamber is connected to the first inlet 611, and the first outlet 612 is connected to the inlet end of all liquid cooling chambers respectively.

[0145] Optionally, one end of the pump 610 with a first outlet 612 is detachably connected to the inlet end of the liquid cooling chamber.

[0146] This allows for easy adjustment of the connection method between the first outlet 612 of the pump 610 and the multiple liquid cooling chambers according to the design requirements of multiple liquid cooling chambers in parallel or series connection, so as to realize the parallel or series connection of multiple liquid cooling chambers.

[0147] In some embodiments, the mounting frame 110 is provided with a first connector 191 communicating with the first cavity Q1, a second connector 192 communicating with the second cavity Q2, and a third connector 193 communicating with the third cavity Q3. The first connector 191, the second connector 192 and the third connector 193 are respectively detachably connected to the first outlet 612 of the pump 610.

[0148] This allows for easy adjustment of the connection method of the first cavity Q1, the second cavity Q2, and the third cavity Q3 as needed, such as switching between series, parallel, and mixed connections (mixed connection refers to a combination of series and parallel connections).

[0149] In some embodiments, the projection optical engine 10 further includes a mounting bracket 640, on which the optical engine mounting base 200, pump 610, housing 620 and cooler 630 are all detachably mounted.

[0150] It facilitates the assembly and disassembly of the projection optical engine 10, and also makes it easy to move the projection optical engine 10 as a whole.

[0151] In some embodiments, the optical assembly 100 further includes a light source 183 and a focusing rod 184. Along the first direction F1, the focusing rod 184 is disposed on the side of the first light-transmitting element 120 away from the first Fresnel lens 130, and the light source 183 is disposed on the side of the focusing rod 184 away from the first light-transmitting element 120.

[0152] The light emitted by the light source 183 (the image to be projected) shines through the light-focusing rod 184 onto the first light-transmitting element 120 of the optical component 100. This light can pass sequentially through the first light-transmitting element 120, the first Fresnel lens 130, the second light-transmitting element 140, the LCD screen 150, the third light-transmitting element 160, and the second Fresnel lens 170, and then be reflected by the reflector 400 onto the lens 500, and then onto the screen through the lens 500 to display the image to be projected on the screen.

[0153] In some embodiments, the projection optical engine 10 further includes a first heat sink 710, a second heat sink 720, a second fan 730, a third fan 740, a focusing rod bracket 810, and a light source bracket 820. The focusing rod 184 passes through the focusing rod bracket 810 along a first direction F1. The first heat sink 710 is located on the top of the focusing rod bracket 810 and contacts the focusing rod bracket 810. The light source 183 is located on the light source bracket 820, and the second heat sink 720 contacts the light source bracket 820. Along the first direction F1, the second fan 730 and the third fan 740 are located on the side of the light source bracket 820 away from the mounting frame 110.

[0154] Specifically, the second heat sink 720 includes heat dissipation bodies 721 located on opposite sides of the focusing rod bracket 810 along the third direction F3, and a metal tube 722 connected to the heat dissipation body 721, the metal tube 722 being in contact with the light source bracket 820.

[0155] Optionally, the first radiator 710 and the second radiator 720 may be finned radiators.

[0156] Thus, driven by the second fan 730 and the third fan 740, the gas on one side of the optical engine mounting 200 along the first direction F1 flows through the cooler 630, the optical engine mounting 200 and the optical component 100 on one side of the optical engine mounting 200, and then through the first heat sink 710 and the second heat sink 720. The first heat sink 710 and the second heat sink 720 can remove the heat from the light source 183 and the focusing rod 184, thereby effectively dissipating heat from the light source 183 and the focusing rod 184.

[0157] Optionally, the focusing rod support 810 has an inclined surface 811, and the heat dissipation body 721 is located on opposite sides of the focusing rod support 810 along the third direction F3. The heat dissipation body 721 includes a first heat dissipation fin 7211 disposed opposite to the inclined surface 811. In this way, the layout of the heat dissipation body 721 and the focusing rod support 810 can be more compact, which is beneficial to reducing the volume occupied by the projection optical engine 10.

[0158] Optionally, the cooler 630 includes multiple cooling pipes and second heat dissipation fins disposed on the cooling pipes. The two ends of the cooling pipes are respectively connected to a second inlet and a second outlet. In this way, it is convenient to use the second fan 730 and the third fan 740 to dissipate heat from the cooler 630, thereby making better use of the cooler 630 to dissipate heat from the optical component 100.

[0159] One embodiment of this application also provides a projector, including the projection optical engine 10 of any of the above embodiments.

[0160] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0161] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A projection optical engine, characterized in that, Includes optical components, said optical components include: Mounting frame; and A first light-transmitting element, a first Fresnel lens, a second light-transmitting element, an LCD screen, and a third light-transmitting element are arranged at intervals along a first direction on the inner periphery of the mounting frame; The first light-transmitting element, the first Fresnel lens, and the mounting frame enclose a first cavity. The second light-transmitting element, the LCD screen, and the mounting frame enclose a second cavity; The LCD screen, the third light-transmitting element, and the mounting frame enclose a third cavity; The first Fresnel lens, the second light-transmitting element, and the mounting frame enclose a fourth cavity; At least one of the first cavity, the second cavity, the third cavity, and the fourth cavity is a liquid-cooled cavity, and at least another of the first cavity, the second cavity, the third cavity, and the fourth cavity is an air-cooled cavity.

2. The projection optical engine according to claim 1, characterized in that, One of the first cavity, the second cavity, the third cavity, and the fourth cavity is an air-cooled cavity, and the other three of the first cavity, the second cavity, the third cavity, and the fourth cavity are liquid-cooled cavities.

3. The projection optical engine according to claim 2, characterized in that, The first cavity, the second cavity, and the third cavity are all liquid-cooled cavities; The fourth cavity is an air-cooled cavity; The first cavity, the second cavity, and the third cavity are connected in series and / or in parallel.

4. The projection optical engine according to any one of claims 1-3, characterized in that, The optical component also includes a seal; The sealing element is provided between the first light-transmitting element and the mounting frame; and / or The sealing element is provided between the first Fresnel lens and the mounting frame; and / or The sealing element is provided between the second light-transmitting element and the mounting frame; and / or The sealing element is provided between the third light-transmitting element and the mounting frame; and / or The mounting frame includes a first frame and a second frame that are detachably connected along the first direction; the LCD screen is disposed between the first frame and the second frame; and the sealing element is provided between the first frame and the second frame.

5. The projection optical engine according to any one of claims 1-3, characterized in that, The projection optical engine also includes: Pump; The housing has a receiving cavity for containing coolant; and Cooler; All of the liquid cooling chambers are connected to the receiving chamber by means of the pump and the cooler.

6. The projection optical engine according to any one of claims 1-3, characterized in that, The projection optical engine also includes: An optical engine mounting base is at least partially disposed on one side of the optical component along the first direction; the optical engine mounting base has a first mounting cavity, and the optical engine mounting base is provided with a first air outlet and a first air return outlet respectively connected to the first mounting cavity; the air-cooling cavity is respectively connected to the first air outlet and the first air return outlet. The first fan is located inside the first mounting cavity.

7. The projection optical engine according to claim 6, characterized in that, The optomechanical mounting base includes: The optical engine housing is located on one side of the optical component along the first direction; The first air guide and the second air guide are detachably connected to opposite sides of the optical engine housing along the second direction, and to opposite sides of the mounting frame along the second direction; The first mounting cavity is formed within the first air guide member; The first air outlet is located on the first air guide; The first return air inlet is located on the second air guide component; The first direction and the second direction intersect each other.

8. The projection optical engine according to claim 7, characterized in that, The optical engine housing has a second mounting cavity, which is connected to the first mounting cavity and the first return air vent, respectively; the projection optical engine further includes: A reflector, disposed within the second mounting cavity and located on the light-emitting side of the optical component; and The lens is located on the light-emitting side of the reflector; The lens is mounted on the optical engine mount and extends at least partially into the second mounting cavity.

9. The projection optical engine according to claim 8, characterized in that, The first air guide is also provided with a second air outlet, which is connected to the first mounting cavity and the second mounting cavity respectively.

10. A projector, characterized in that, Including the projection optical engine as described in any one of claims 1-9.

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