Projection ray machine and projector

Abstract

The utility model relates to a projection light machine and a projector. The projection ray machine comprises an optical assembly, a ray machine mounting seat, a first fan, a reflector and a lens, the optical assembly comprises a mounting frame, a first optical device and a second optical device, and an air cooling cavity is defined by the first optical device, the second optical device and the mounting frame; the optical machine mounting seat is at least partially arranged on one side of the optical assembly in the first direction, the optical machine mounting seat is provided with a first mounting cavity and a second mounting cavity which are communicated with each other, the first fan is arranged in the first mounting cavity, and the reflector is arranged in the second mounting cavity and located on the light emitting side of the optical assembly; the lens penetrates through the ray machine mounting base, at least part of the lens extends into the second mounting cavity, and the lens is located on the light emitting side of the reflector. The air cooling cavity communicates with the first mounting cavity and the second mounting cavity. Water drops can be prevented from being condensed on the surfaces of the reflecting mirror and the lens, so that an effective anti-fog effect can be achieved, and the quality of pictures projected by the projection ray machine 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 typically consist of an LCD screen, a reflector, and a lens. Light emitted from the LCD screen is reflected by the reflector to the lens, and then exits through the lens to project an image. However, traditional projector lenses and reflectors are prone to fogging, resulting in blurry projected images or even completely unviewable images. Utility Model Content

[0003] Therefore, it is necessary to provide a projection optical engine and projector to address the problem that traditional projector lenses and reflectors are prone to fogging, resulting in blurry or even completely invisible projected images.

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

[0005] Optical components, the optical components including:

[0006] Mounting frame; and

[0007] A first optical device and a second optical device are arranged at intervals along a first direction on the inner periphery of the mounting frame; the first optical device, the second optical device, and the mounting frame together form a cooling cavity.

[0008] An optical engine mounting base is at least partially disposed on one side of the optical component along the first direction, and the optical engine mounting base has a first mounting cavity and a second mounting cavity that communicate with each other;

[0009] A first fan is disposed within the first mounting cavity;

[0010] A reflector, disposed in the second mounting cavity and located on the light-emitting side of the optical component; and

[0011] A lens is inserted through the optical engine mounting base and at least partially extends into the second mounting cavity, the lens being located on the light-emitting side of the reflector;

[0012] The air-cooled cavity is connected to both the first mounting cavity and the second mounting cavity.

[0013] In one embodiment, the optomechanical mounting base includes:

[0014] An optical engine housing is disposed on one side of the optical component along the first direction; and

[0015] The first air guide is detachably connected to the optical engine housing and the mounting frame on one side along the second direction;

[0016] The first mounting cavity is formed in the first air guide;

[0017] The second mounting cavity is formed within the optomechanical housing;

[0018] The first air guide is provided with a first air outlet that is connected to the first mounting cavity and the air-cooling cavity respectively;

[0019] The first direction and the second direction intersect each other.

[0020] 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;

[0021] The first air outlet extends along the first direction; and / or

[0022] The second air outlet extends along the second direction.

[0023] In one embodiment, the first air guide includes a first air guide portion and a second air guide portion connected along the first direction;

[0024] The optical engine housing is provided with a first slot on one side along the second direction, and at least part of the first air guide is adapted to be disposed in the first slot, and the first air guide is detachably connected to one side of the optical engine housing along the second direction.

[0025] The first air outlet is formed on the first air guide section;

[0026] The second air guide is detachably connected to one side of the mounting frame along the second direction, and the second air guide is provided with a third air outlet, which is connected to the first air outlet and the air-cooling cavity respectively.

[0027] In one embodiment, the second air guide portion has a first mounting plane at one end where the third air outlet is disposed, and the third air outlet is disposed through the first mounting plane;

[0028] The mounting frame has a second mounting plane on one side along the second direction that is opposite to and detachably connected to the first mounting plane;

[0029] The mounting frame is provided with a first air passage that extends from the inner wall of the mounting frame to the second mounting plane. The first air passage is connected to the third air outlet and the air-cooling cavity.

[0030] In one embodiment, the optical engine mounting base includes a second air guide, which is detachably connected to the optical engine housing and the mounting frame on the side away from the first air guide along a second direction;

[0031] The second air guide is provided with a first return air inlet that communicates with the second mounting cavity and the air-cooling cavity.

[0032] In one embodiment, the optical engine housing is provided with a second slot on the side away from the first air guide along the second direction;

[0033] The second air guide is provided at one end of the first return air inlet, which is adapted to the second slot and is located within the second slot.

[0034] In one embodiment, the second air guide has a third mounting plane, and the second air guide is further provided with a second return air inlet that penetrates the third mounting plane;

[0035] The second return air inlet is connected to both the first return air inlet and the air-cooled cavity.

[0036] The mounting frame is provided with a fourth mounting plane that is opposite to and parallel to the third mounting plane, and the third mounting plane is detachably connected to the fourth mounting plane.

[0037] In one embodiment, the optical component further includes a seal;

[0038] The sealing element is provided between the first optical device and the mounting frame; and / or

[0039] The sealing element is provided between the second optical device and the mounting frame.

[0040] In one embodiment, the mounting frame has a plurality of first air vents spaced apart on one side along the second direction; each first air vent is connected to the first mounting cavity and the air-cooling cavity respectively; and / or

[0041] The mounting frame is provided with a plurality of second air vents spaced apart on the other side along the second direction; each of the second air vents is connected to the second mounting cavity and the air-cooling 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, during the operation of the projection optical engine, the first fan can be used to make the air in the first mounting cavity flow into the air-cooling cavity, then flow into the second mounting cavity through the air-cooling cavity, and finally flow back into the first mounting cavity. A circulating airflow can be formed in the first mounting cavity, the air-cooling cavity, and the second mounting cavity. During this process, the circulating airflow can be used to dissipate heat from the first optical device and the second optical device. The circulating airflow can also be used to accelerate the evaporation rate of the liquid on the surface of the reflector and the lens, preventing water droplets from condensing on the surface of the reflector and the lens, thereby playing an effective anti-fog role and improving the image quality projected by the projection optical engine. Attached Figure Description

[0044] Figure 1 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.

[0045] Figure 2 A schematic diagram of a portion of the projection optical engine according to an embodiment of this application is shown from another perspective.

[0046] Figure 3 It shows Figure 5 A schematic cross-sectional view of the partial structure of the projection optical engine at point BB.

[0047] Figure 4 A partial cross-sectional schematic diagram of an optical component according to an embodiment of this application is shown.

[0048] Figure 5 It shows Figure 3 A schematic cross-sectional view of section AA of the partial structure of the projection optical engine shown.

[0049] Figure 6 A schematic diagram of the structure of the first air guide component according to an embodiment of this application is shown.

[0050] Figure 7 A schematic diagram of the structure of the first air guide and the first fan according to an embodiment of this application is shown.

[0051] Figure 8 A schematic diagram of the structure of the top cover according to an embodiment of this application is shown.

[0052] Figure 9 It shows Figure 5 A schematic cross-sectional view of the partial structure of the projection optical engine at point C.

[0053] Figure 10 It shows Figure 9 A schematic cross-sectional view of the DD section of the partial structure of the projection optical engine shown.

[0054] Figure 11A schematic diagram of the structure of the second air guide component according to an embodiment of this application is shown.

[0055] Figure 12 A schematic diagram of the bottom shell of an embodiment of this application is shown.

[0056] Reference numerals: 10, Projection optical engine; 100, Optical component; 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 phenanthrene element. 140. Fresnel lens; 150. Second light-transmitting element; 160. LCD screen; 170. Third light-transmitting element; 181. Second Fresnel lens; 182. First seal; 182. Second seal; 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; 21 13. Second limiting component; 2114. Third limiting component; 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 component; 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 component; 231. Third mounting plane; H1. First return air outlet; H2. Second return air outlet; L4. Fifth connecting hole; L5. Sixth connecting hole; D2. Second air duct; 300. First fan; 400. Reflector; 500. Lens. Detailed Implementation

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] Figure 1 The diagram shows a partial structural schematic of a projection optical engine according to an embodiment of this application from a certain perspective. Figure 2 The diagram shows a partial structure of a projection optical engine according to an embodiment of this application from another perspective. Figure 3 A cross-sectional schematic diagram of the BB section of a partial structure of a projection optical engine according to an embodiment of this application is shown.

[0064] Please refer to the following: Figures 1-3 One embodiment of this application provides a projection optical engine 10, including an optical assembly 100, an optical engine mounting base 200, a first fan 300, a reflector 400, and a lens 500. The optical assembly 100 includes a mounting frame 110, a first optical element, and a second optical element. The first and second optical elements are arranged at intervals along a first direction F1 on the inner periphery of the mounting frame 110; the first and second optical elements and the mounting frame 110 define a cooling cavity.

[0065] Specifically, such as Figure 4 As shown, the optical assembly 100 includes 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 arranged sequentially at intervals along a first direction F1. One of 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 may be a first optical device, and one of 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 arranged adjacent to the first optical device is a second optical device.

[0066] It is possible that 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 one of the first cavity Q1, the second cavity Q2, the third cavity Q3, and the fourth cavity Q4 is an air-cooled cavity.

[0067] For example, if the first optical device is a first Fresnel lens 130 and the second optical device is a second light-transmitting element 140, then the fourth cavity Q4 is a wind-cooled cavity.

[0068] In this embodiment, the first cavity Q1, the second cavity Q2, and the third cavity Q3 are all liquid-cooled cavities.

[0069] The first light-transmitting element 120, the second light-transmitting element 140, and the third light-transmitting element 160 can 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.

[0070] 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 and a second mounting cavity Z2 that are connected to each other. The first fan 300 is disposed in the first mounting cavity Z1, the reflector 400 is disposed in the second mounting cavity Z2 and is located on the light-emitting side of the optical component 100, and the lens 500 passes through the optical engine mounting base 200 and extends at least partially into the second mounting cavity Z2. The lens 500 is located on the light-emitting side of the reflector 400.

[0071] The air-cooled cavity is connected to the first mounting cavity Z1 and the second mounting cavity Z2, respectively.

[0072] 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. This circulating airflow can dissipate heat from the first and second optical components and 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. This effectively prevents fogging and improves the image quality projected by the projection optical engine 10.

[0073] In some embodiments, the first optical device is a first Fresnel lens 130, and the second optical device is a second light-transmitting element 140.

[0074] In this way, the first fan 300 can form a circulating airflow in the first mounting cavity Z1, the air-cooling cavity and the second mounting cavity Z2, thereby effectively cooling the Fresnel surface of the first Fresnel lens 130 and improving the heat dissipation problem of the first Fresnel lens 130.

[0075] In some embodiments, please refer to Figure 3 and in conjunction with reference Figure 5 and Figure 6 The optical engine mounting base 200 includes an optical engine housing 210 and a first air guide 220. The optical engine housing 210 is located on one side of the optical component 100 along the first direction F1. The first air guide 220 is detachably connected to the optical engine housing 210 and the mounting frame 110 on one side along the second direction F2. A first mounting cavity Z1 is formed within the first air guide 220, and a second mounting cavity Z2 is formed within the optical engine housing 210. The first air guide 220 has a first air outlet C1 that communicates with both the first mounting cavity Z1 and the air-cooling cavity. The first direction F1 and the second direction F2 intersect each other.

[0076] like Figure 7 As shown, the first fan 300 is completely housed in the first mounting cavity Z1.

[0077] 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 3 and Figure 8The 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.

[0078] Optionally, the optical engine housing 210 also includes a plurality of first connectors, such as Figure 8 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 6 As 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.

[0079] Optionally, the top cover 212 can be bolted to one side of the bottom shell 211 along the second direction F2.

[0080] 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.

[0081] 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.

[0082] In some embodiments, please refer to Figure 6 and Figure 9 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.

[0083] 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.

[0084] In some embodiments, the first air outlet C1 extends along the first direction F1.

[0085] 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.

[0086] In some embodiments, the second air outlet C2 extends along the second direction F2.

[0087] 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.

[0088] 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.

[0089] In this embodiment, the second air outlet C2 is also formed on the first air guide 221.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] Optionally, such as Figure 10 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] In some embodiments, please refer to Figure 2 , Figure 3 and Figure 11 The optical engine mounting base 200 includes a second air guide 230, which is detachably 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. The second air guide 230 is provided with a first return air port H1 that communicates with the second mounting cavity Z2 and the air-cooling cavity.

[0101] 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.

[0102] Specifically, the second opening K3 is located on the side of the bottom shell 211 away from the top cover 212.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] Optionally, the mounting frame 110 is provided with a plurality of second air inlets G2 arranged at intervals on the other side along the second direction F2, and each second air inlet G2 is connected to the second mounting cavity Z2 and the air-cooling cavity respectively.

[0109] The second air vent G2 can penetrate from the inner wall of the air-cooled cavity to the fourth mounting plane 1132.

[0110] Optionally, multiple second air vents G2 are arranged at intervals along the third direction F3.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] In some embodiments, the optical component 100 further includes a seal, which may be provided between the first optical device and the mounting frame 110; or a seal may be provided between the second optical device and the mounting frame 110; or a seal may be provided between the first optical device and the mounting frame 110 and another seal may be provided between the second optical device and the mounting frame 110.

[0115] The sealing element can be a first sealing element 181 or a second sealing element 182. The first sealing element 181 can be a sealing ring, and the second sealing element 182 can be an annular sealing gasket.

[0116] Alternatively, the mounting frame 110 may include a first frame 111 and a second frame 112 detachably connected along a first direction F1, with the LCD screen 150 positioned between the first frame 111 and the second frame 112 along the first direction F1. Specifically, the first frame 111 and the second frame 112 may 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 disposed 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 disposed in the second sealing groove.

[0117] 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, and the second light-transmitting element 140 is located between the second frame 112 and the third frame 113.

[0118] Alternatively, the first optical device may be a first Fresnel lens 130, the second optical device may be a second light-transmitting element 140, a second sealing element 182 may be provided between the second light-transmitting element 140 and the third frame 113, and another second sealing element 182 may be provided between the first Fresnel lens 130 and the third frame 113.

[0119] Specifically, the mounting frame 110 may further include a fourth frame 114, which is detachably connected to the side of the third frame 113 opposite to the second frame 112, and the first Fresnel lens 130 is located between the third frame 113 and the fourth frame 114.

[0120] Alternatively, the first optical device may be a first Fresnel lens 130, the second optical device may be a second light-transmitting element 140, and a first sealing element 181 may be provided between the first Fresnel lens 130 and the fourth frame 114. Specifically, the fourth frame 114 may have a third sealing groove on the side facing the third frame 113, and a first sealing element 181 may be provided in the second sealing groove.

[0121] 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.

[0122] 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.

[0123] Alternatively, a second sealing element 182 may be provided between the first light-transmitting element 120 and the fifth frame 115.

[0124] 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.

[0125] 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. Alternatively, a second sealing element 182 may be provided between the third light-transmitting element 160 and the sixth frame 116.

[0126] 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.

[0127] 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.

[0128] In some embodiments, please refer to Figure 10 and Figure 12 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.

[0129] In this way, the light emitted from the optical component 100 can be effectively reflected to the lens 500 using the reflector 400.

[0130] 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.

[0131] In this way, the reflector 400 can be stably installed in the limiting groove 2111.

[0132] 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.

[0133] One embodiment of this application provides a projector, including the projection optical engine 10 of any of the above embodiments.

[0134] 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.

[0135] 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, The projection optical engine includes: Optical components, the optical components including: Mounting frame; and A first optical device and a second optical device are arranged at intervals along a first direction on the inner periphery of the mounting frame; the first optical device, the second optical device, and the mounting frame together form a cooling cavity. An optical engine mounting base is at least partially disposed on one side of the optical component along the first direction, and the optical engine mounting base has a first mounting cavity and a second mounting cavity that communicate with each other; A first fan is disposed within the first mounting cavity; A reflector, disposed in the second mounting cavity and located on the light-emitting side of the optical component; and A lens is inserted through the optical engine mounting base and at least partially extends into the second mounting cavity, the lens being located on the light-emitting side of the reflector; The air-cooled cavity is connected to both the first mounting cavity and the second mounting cavity.

2. The projection optical engine according to claim 1, characterized in that, The optomechanical mounting base includes: An optical engine housing is disposed on one side of the optical component along the first direction; and The first air guide is detachably connected to the optical engine housing and the mounting frame on one side along the second direction; The first mounting cavity is formed in the first air guide; The second mounting cavity is formed within the optomechanical housing; The first air guide is provided with a first air outlet that is connected to the first mounting cavity and the air-cooling cavity respectively; The first direction and the second direction intersect each other.

3. The projection optical engine according to claim 2, 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; The first air outlet extends along the first direction; and / or The second air outlet extends along the second direction.

4. The projection optical engine according to claim 2, characterized in that, The first air guide includes a first air guide portion and a second air guide portion connected along the first direction; The optical engine housing is provided with a first slot on one side along the second direction, and at least part of the first air guide is adapted to be disposed in the first slot, and the first air guide is detachably connected to one side of the optical engine housing along the second direction. The first air outlet is formed on the first air guide section; The second air guide is detachably connected to one side of the mounting frame along the second direction, and the second air guide is provided with a third air outlet, which is connected to the first air outlet and the air-cooling cavity respectively.

5. The projection optical engine according to claim 4, characterized in that, The second air guide section has a first mounting plane at one end where the third air outlet is located, and the third air outlet is disposed through the first mounting plane; The mounting frame has a second mounting plane on one side along the second direction that is opposite to and detachably connected to the first mounting plane; The mounting frame is provided with a first air passage that extends from the inner wall of the mounting frame to the second mounting plane. The first air passage is connected to the third air outlet and the air-cooling cavity.

6. The projection optical engine according to claim 2, characterized in that, The optical engine mounting base includes a second air guide, which is detachably connected to the optical engine housing and the mounting frame on the side away from the first air guide along a second direction; The second air guide is provided with a first return air inlet that communicates with the second mounting cavity and the air-cooling cavity.

7. The projection optical engine according to claim 6, characterized in that, The optical engine housing is provided with a second slot on the side away from the first air guide along the second direction; The second air guide is provided at one end of the first return air inlet, which is adapted to the second slot and is located within the second slot.

8. The projection optical engine according to claim 7, characterized in that, The second air guide has a third mounting plane, and the second air guide is also provided with a second return air inlet that penetrates the third mounting plane; The second return air inlet is connected to both the first return air inlet and the air-cooled cavity. The mounting frame is provided with a fourth mounting plane that is opposite to and parallel to the third mounting plane, and the third mounting plane is detachably connected to the fourth mounting plane.

9. The projection optical engine according to any one of claims 1-6, characterized in that, The optical component also includes a seal; The sealing element is provided between the first optical device and the mounting frame; and / or The sealing element is provided between the second optical device and the mounting frame.

10. The projection optical engine according to any one of claims 1-6, characterized in that, The mounting frame has a plurality of first air vents spaced apart on one side along the second direction; each of the first air vents is connected to the first mounting cavity and the air-cooling cavity respectively; and / or The mounting frame is provided with a plurality of second air vents spaced apart on the other side along the second direction; each of the second air vents is connected to the second mounting cavity and the air-cooling cavity respectively.

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

Images