Projection ray machine and projector

Abstract

The utility model relates to a projection light machine and a projector. The projection light machine comprises at least two sets of optical assemblies, each optical assembly comprises a first light-transmitting element, an LCD screen, a second light-transmitting element, a first Fresnel lens and a third light-transmitting element which are arranged at intervals, the LCD screen comprises a screen body, a first liquid cooling cavity used for containing the screen body is defined between the first light-transmitting element and the second light-transmitting element, and a second liquid cooling cavity used for containing the screen body is defined between the second light-transmitting element and the third light-transmitting element. A second liquid cooling cavity is defined between the first Fresnel lens and the third light-transmitting element, and in all the optical assemblies, all the first liquid cooling cavities and all the second liquid cooling cavities are arranged in series and / or in parallel. According to the projection light machine, the first light-transmitting element, the LCD screen, the second light-transmitting element, the first Fresnel lens and the third light-transmitting element of the optical assembly can be well cooled by adopting a liquid cooling heat dissipation mode, so that the heat dissipation effect of the at least two groups of optical assemblies can be improved, and the heat dissipation effect of the projection light machine and the projector comprising the projection light machine can also be improved.

Description

Technical Field

[0001] The present application relates to the field of projection technology, and in particular to a projection optical machine and a projector. Background Art

[0002] A projector is a device that can project videos, images or text onto a screen for display. It is widely used in places such as homes, offices, schools or cinemas.

[0003] When the light emitted by the light source of the projector passes through the optical element of the projector, the optical element absorbs a large amount of light that cannot pass through, causing the temperature of the optical element to rise. Therefore, it is necessary to perform heat dissipation treatment on the optical element. However, the heat dissipation effect of the projector in the related art is poor. Utility Model Content

[0004] Based on this, it is necessary to provide a projection optical machine and a projector to address the problem of poor heat dissipation effect of the projector in the related art.

[0005] According to a first aspect of the present application, there is provided a projection optical machine, comprising at least two groups of optical components;

[0006] Each of the optical components comprises a first light-transmitting element, an LCD screen, a second light-transmitting element, a first Fresnel lens and a third light-transmitting element which are arranged at intervals;

[0007] The LCD screen comprises a screen body, and a first liquid cooling cavity for accommodating the screen body is defined between the first light-transmitting element and the second light-transmitting element;

[0008] A second liquid cooling cavity is defined between the first Fresnel lens and the third light-transmitting element;

[0009] In all the optical components, all the first liquid-cooling cavities and all the second liquid-cooling cavities are arranged in series and / or in parallel.

[0010] In one embodiment, in all the optical components, all the first liquid-cooling cavities and all the second liquid-cooling cavities are arranged in series.

[0011] In one of the embodiments, the projection light engine further includes a heat exchanger and a pump;

[0012] The heat exchanger has a heat exchange channel, and the pump has an inlet and an outlet;

[0013] The one located most upstream among all the first liquid cooling cavities and all the second liquid cooling cavities is communicated with the outlet, the inlet is communicated with one end of the heat exchange channel, and the other end of the heat exchange channel is communicated with the one located most downstream among all the first liquid cooling cavities and all the second liquid cooling cavities.

[0014] In one of the embodiments, the projection light machine further includes a mounting member;

[0015] The mounting member is provided with at least two first openings, at least two second openings, at least two third openings and at least two fourth openings corresponding to at least two groups of optical components;

[0016] In the same optical component, the first light-transmitting element is sealed and connected to the side wall of the corresponding first opening, and the second light-transmitting element is sealed and connected to the side wall of the corresponding second opening; and / or, in the same optical component, the first Fresnel lens is sealed and connected to the side wall of the corresponding third opening, and the third light-transmitting element is sealed and connected to the side wall of the corresponding fourth opening.

[0017] In one embodiment, the projection light machine includes two sets of optical components;

[0018] In one of the optical assemblies, the first light-transmitting element, the LCD screen, the second light-transmitting element, the first Fresnel lens and the third light-transmitting element are arranged at intervals along a first direction;

[0019] In another optical assembly, the first light-transmitting element, the LCD screen, the second light-transmitting element, the first Fresnel lens and the third light-transmitting element are arranged at intervals along the second direction;

[0020] The first direction and the second direction are perpendicular to each other.

[0021] In one embodiment, each of the optical components further comprises a light source disposed on a side of the corresponding third light-transmitting element away from the corresponding first Fresnel lens;

[0022] The light emitted by the light source of one of the optical components is red light, and the light emitted by the light source of the other optical component is blue-green light;

[0023] The projector also includes a lens and a first dimming component, and the first dimming component is arranged at an angle to the first direction and the second direction respectively, so that the light emitted by one of the optical components can be incident on the lens through the first dimming component, and the light emitted by another optical component can be reflected to the lens with the help of the first dimming component.

[0024] In one of the embodiments, the projection light machine includes three groups of optical components;

[0025] The first light-transmitting element, the LCD screen, the second light-transmitting element, the first Fresnel lens and the third light-transmitting element of one group of the optical components are arranged at intervals along a first direction, and the other two groups of the optical components are arranged on opposite sides of the one group of the optical components along a second direction, and the first light-transmitting element, the LCD screen, the second light-transmitting element, the first Fresnel lens and the third light-transmitting element of the other two groups of the optical components are arranged at intervals along the second direction;

[0026] The first direction and the second direction are perpendicular to each other.

[0027] In one embodiment, each of the optical components further comprises a light source disposed on a side of the corresponding third light-transmitting element away from the corresponding first Fresnel lens;

[0028] The light sources of the three groups of optical components emit red light, green light and blue light respectively;

[0029] The projector also includes a lens, a second dimming component and a third dimming component, wherein light emitted by one of the optical components is incident on the lens through the second dimming component and the third dimming component, light emitted by another optical component is incident on the third dimming component through the second dimming component and is reflected to the lens with the help of the third dimming component, and light emitted by yet another optical component is incident on the second dimming component through the third dimming component and is reflected to the lens with the help of the second dimming component.

[0030] In one embodiment, the light-emitting sides of the three groups of optical components are surrounded by a receiving cavity, and the second dimming component and the third dimming component are arranged crosswise with each other and are located in the receiving cavity;

[0031] The second dimming component is arranged at an angle to the first direction and the second direction respectively;

[0032] The third dimming component is disposed at an angle to the first direction and the second direction respectively.

[0033] According to a second aspect of the present application, a projector is provided, comprising the projection optical engine of any one of the above embodiments.

[0034] In the technical solution of the present application, since all the first liquid cooling chambers and all the second liquid cooling chambers in all the optical components are arranged in series and / or in parallel, the cooling liquid flowing into the first liquid cooling chamber can be used to dissipate the heat of the first light-transmitting element, the LCD screen and the second light-transmitting element, and the cooling liquid flowing into the second liquid cooling chamber can be used to dissipate the heat of the corresponding first Fresnel lens and the corresponding third light-transmitting element. In this way, the first light-transmitting element, the LCD screen, the second light-transmitting element, the first Fresnel lens and the third light-transmitting element of the optical component can be well dissipated by liquid cooling, thereby improving the heat dissipation effect of at least two groups of optical components, and also improving the heat dissipation effect of the projection optical machine and the projector including the projection optical machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A top view of a projection light engine in an embodiment of the present application is shown.

[0036] Figure 2 A schematic diagram of the structure of a projection optical machine in an embodiment of the present application is shown.

[0037] Figure 3 A top view of a projection light engine in another embodiment of the present application is shown.

[0038] Figure 4 A schematic diagram of the structure of a projection optical machine in another embodiment of the present application is shown.

[0039] Reference numerals: 10, projection light machine; 100, optical component; 110, first light-transmitting element; 120, LCD screen; 121, cable; 130, second light-transmitting element; 140, first Fresnel lens; 150, third light-transmitting element; 160, light source; 170, focusing rod; 180, second Fresnel lens; 200, heat exchanger; 201, heat exchange channel; 210, heat exchanger body; 220, heat dissipation fins; 230, heat dissipation fan; 30 0, pump; 301, inlet; 302, outlet; 400, mounting member; 401, first opening; 402, second opening; 403, third opening; 404, fourth opening; 405, cable channel; 500, lens; 610, first dimming component; 620, second dimming component; 630, third dimming component; 710, first pipeline; 720, second pipeline; A, first liquid cooling chamber; B, second liquid cooling chamber; C, receiving tank; R, receiving chamber. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0041] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0042] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0044] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, 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 implementation method.

[0046] Figure 1 A top view of a projection light engine in an embodiment of the present application is shown. Figure 2 A schematic diagram of the structure of a projection optical machine in an embodiment of the present application is shown.

[0047] See also Figure 1 and Figure 2 A projection optical machine 10 provided in one embodiment of the present application includes at least two groups of optical components 100 .

[0048] Each optical assembly 100 includes a first light-transmitting element 110 , an LCD screen 120 , a second light-transmitting element 130 , a first Fresnel lens 140 , and a third light-transmitting element 150 , which are arranged at intervals.

[0049] The LCD screen 120 includes a screen body. A first liquid cooling cavity A for accommodating the screen body is defined between the first light-transmitting element 110 and the second light-transmitting element 130 . A second liquid cooling cavity B is defined between the first Fresnel lens 140 and the third light-transmitting element 150 .

[0050] Optionally, the first light-transmitting element 110 may include a first glass.

[0051] Optionally, the second light-transmitting element 130 may include a second glass, and may further include a polarizing film disposed on the surface of the second glass, and the polarizing film may be used to allow the required light to be incident on the LCD screen 120, and then incident on the lens 500 of the optical projection machine 10. The second glass may be a heat-insulating glass, and the heat-dissipating effect of the first liquid-cooling cavity A may be improved by using the second light-transmitting element 130 having a heat-insulating function, and thus the heat-dissipating effect of the first light-transmitting element 110, the LCD screen 120, and the second light-transmitting element 130 may be improved.

[0052] Optionally, the third light-transmitting element 150 may include a third glass.

[0053] In all optical assemblies 100 , all first liquid cooling cavities A and all second liquid cooling cavities B are arranged in series and / or in parallel.

[0054] It may be that, among the two groups of optical components 100, the spacing arrangement direction of the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140 and the third light-transmitting element 150 of one optical component 100 intersects with the spacing arrangement direction of the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140 and the third light-transmitting element 150 of the other optical component 100. It may also be that, among the two groups of optical components 100, the spacing arrangement direction of the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140 and the third light-transmitting element 150 of one optical component 100 is parallel to the spacing arrangement direction of the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140 and the third light-transmitting element 150 of the other optical component 100. Of course, it is also possible that the projection light machine 10 includes three groups of optical components 100, wherein the spacing directions of the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140 and the third light-transmitting element 150 of two groups of optical components 100 are parallel to each other, and the spacing directions of the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140 and the third light-transmitting element 150 of another group of optical components 100 intersect with the spacing directions of the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140 and the third light-transmitting element 150 of the two groups of optical components 100.

[0055] “All first liquid-cooling chambers A and all second liquid-cooling chambers B are arranged in series and / or in parallel” can mean that all first liquid-cooling chambers A and all second liquid-cooling chambers B are arranged in series; or all first liquid-cooling chambers A and all second liquid-cooling chambers B are arranged in parallel; or all first liquid-cooling chambers A are connected in series to form a first series group, and all second liquid-cooling chambers B are connected in series to form a second series group, and the first series group and the second series group are arranged in parallel; of course, the present application is not limited thereto, and all first liquid-cooling chambers A and all second liquid-cooling chambers B can also be connected in series and in parallel in other ways.

[0056] Since in all the optical components 100, all the first liquid cooling chambers A and all the second liquid cooling chambers B are arranged in series and / or in parallel, the cooling liquid flowing into the first liquid cooling chamber A can be used to dissipate heat for the first light-transmitting element 110, the LCD screen 120 and the second light-transmitting element 130, and the cooling liquid flowing into the second liquid cooling chamber B can be used to dissipate heat for the corresponding first Fresnel lens 140 and the corresponding third light-transmitting element 150. In this way, the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140 and the third light-transmitting element 150 of the optical component 100 can be well dissipated by liquid cooling, thereby improving the heat dissipation effect of at least two groups of optical components 100, and also improving the heat dissipation effect of the projection optical machine 10 and the projector including the projection optical machine 10.

[0057] In some embodiments, in all optical assemblies 100 , all first liquid-cooling cavities A and all second liquid-cooling cavities B are arranged in series.

[0058] Thus, compared with the pipelines required for the parallel arrangement, fewer pipelines are required for the series arrangement of all the first liquid cooling chambers A and all the second liquid cooling chambers B, which is beneficial to improving the installation efficiency of the projection optical engine 10 and reducing the installation cost of the projection optical engine 10.

[0059] In some embodiments, the projection light machine 10 further includes a heat exchanger 200 and a pump 300, the heat exchanger 200 has a heat exchange channel 201, the pump 300 has an inlet 301 and an outlet 302, the one located most upstream among all the first liquid cooling cavities A and all the second liquid cooling cavities B is connected to the outlet 302, the inlet 301 is connected to one end of the heat exchange channel 201, and the other end of the heat exchange channel 201 is connected to the one located most downstream among all the first liquid cooling cavities A and all the second liquid cooling cavities B.

[0060] Specific to Figure 1In the illustrated embodiment, there are two groups of optical components 100, and the coolant flowing out of the outlet 302 of the pump 300 sequentially passes through the second liquid cooling cavity B on the right optical component 100, the second liquid cooling cavity B on the left optical component 100, the first liquid cooling cavity A on the left optical component 100, and the first liquid cooling cavity A on the right optical component 100, that is, the second liquid cooling cavity B on the right optical component 100 is located at the most upstream, and the first liquid cooling cavity A on the right optical component 100 is located at the most downstream.

[0061] In this way, the pump 300 can be used to circulate the coolant in the circulation loop formed by all the first liquid cooling chambers A and all the second liquid cooling chambers B, and the heat of the coolant in the circulation loop can be taken away by the heat exchanger 200, thereby effectively dissipating the heat for all the first liquid cooling chambers A and all the second liquid cooling chambers B.

[0062] Of course, the present application is not limited thereto. For example, when all the first liquid cooling chambers A and all the second liquid cooling chambers B are arranged in parallel, one end of all the first liquid cooling chambers A and all the second liquid cooling chambers B can be connected in parallel to the position where the inlet 301 of the pump 300 is arranged, and the outlet 302 is connected to one end of the heat exchange channel 201, and the other end of all the first liquid cooling chambers A and all the second liquid cooling chambers B are connected in parallel to the other end of the heat exchange channel 201. In this way, the pump 300 and the heat exchanger 200 can also be well utilized to dissipate heat for all the first liquid cooling chambers A and all the second liquid cooling chambers B.

[0063] In some embodiments, the heat exchanger 200 includes a heat exchanger body 210 , heat dissipation fins 220 disposed outside the heat exchanger body 210 , and a heat dissipation fan 230 disposed toward at least a portion of the heat dissipation fins 220 , and the heat exchange channel 201 is disposed inside the heat exchanger body 210 .

[0064] When the heat exchanger 200 is in use, the heat dissipation fins 220 can be used to absorb the heat of the coolant flowing through the heat exchange channel 201, and the heat dissipation fins 220 on the heat exchanger body 210 can be well cooled by the heat dissipation fan 230, thereby well cooling the coolant flowing through the heat exchange channel 201, and then the coolant after cooling is supplied to all the first liquid cooling chambers A and all the second liquid cooling chambers B by the pump 300. In this way, all the first liquid cooling chambers A and all the second liquid cooling chambers B can be cyclically cooled, thereby improving the heat dissipation effect of the projection optical machine 10.

[0065] In some embodiments, the projection light machine 10 also includes a mounting member 400, on which are provided at least two first openings 401 and at least two second openings 402 corresponding one to one with at least two groups of optical components 100. In the same optical component 100, the first light-transmitting element 110 is sealed and connected to the side wall of the corresponding first opening 401, and the second light-transmitting element 130 is sealed and connected to the side wall of the corresponding second opening 402.

[0066] It can be, for example Figure 1-Figure 4 As shown, the mounting member 400 is a whole, and all the first liquid cooling cavities A and all the second liquid cooling cavities B are connected in series to form an inner cavity of the mounting member 400; alternatively, the mounting member 400 includes at least two mounting seats (not shown in the figure), and the number of optical components 100 is two groups as an example for explanation, the mounting member 400 includes two mounting seats, each of which is provided with a corresponding first opening 401, a corresponding second opening 402, a corresponding third opening 403 and a corresponding fourth opening 404, and then all the first liquid cooling cavities A and all the second liquid cooling cavities B are connected in series through corresponding connecting pipes.

[0067] Since the first light-transmitting element 110 is sealed and connected to the side wall of the corresponding first opening 401, and the second light-transmitting element 130 is sealed and connected to the side wall of the corresponding second opening 402, the sealing performance of the first liquid cooling chamber A can be improved, thereby improving the heat dissipation effect of the first light-transmitting element 110, the LCD screen 120 and the second light-transmitting element 130, and thereby improving the heat dissipation effect of the projection optical machine 10.

[0068] In other embodiments, the projection light machine 10 also includes a mounting member 400, on which are provided at least two third openings 403 and at least two fourth openings 404 corresponding one to one with at least two groups of optical components 100. In the same optical component 100, the first Fresnel lens 140 is sealed and connected to the side wall of the corresponding third opening 403, and the third light-transmitting element 150 is sealed and connected to the side wall of the corresponding fourth opening 404.

[0069] Since the first Fresnel lens 140 is sealed and connected to the side wall of the corresponding third opening 403, and the third light-transmitting element 150 is sealed and connected to the side wall of the corresponding fourth opening 404, the sealing of the second liquid-cooling chamber B can be improved, thereby improving the heat dissipation effect of the first Fresnel lens 140 and the third light-transmitting element 150, and further improving the heat dissipation effect of the projection optical machine 10.

[0070] In some other embodiments, the optical projection machine 10 further includes a mounting member 400, on which are provided at least two first openings 401, at least two second openings 402, at least two third openings 403, and at least two fourth openings 404 corresponding to at least two groups of optical components 100. In the same optical component 100, the first light-transmitting element 110 is sealed and connected to the side wall of the corresponding first opening 401, and the second light-transmitting element 130 is sealed and connected to the side wall of the corresponding second opening 402. The first Fresnel lens 140 is sealed and connected to the side wall of the corresponding third opening 403, and the third light-transmitting element 150 is sealed and connected to the side wall of the corresponding fourth opening 404.

[0071] In this way, the sealing performance of the first liquid cooling chamber A and the sealing performance of the second liquid cooling chamber B can be improved, thereby improving the heat dissipation effect of the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140 and the third light-transmitting element 150, thereby improving the heat dissipation effect of the projection optical machine 10.

[0072] In some embodiments, at least two cable passages 405 corresponding to at least two groups of optical components 100 are further provided on the mounting member 400, and the LCD screen 120 also includes a cable 121 connected to the screen body, the cable 121 passes through the cable passage 405, and the portion of the cable 121 passing through the cable passage 405 is sealed and connected to the side wall of the cable passage 405.

[0073] In this way, on the one hand, the sealing performance of the first liquid cooling chamber A can be improved, and the heat dissipation effect of the first light-transmitting element 110, the LCD screen 120 and the second light-transmitting element 130 can be well improved, thereby improving the heat dissipation effect of the projection optical machine 10. On the other hand, it is convenient for the cable 121 of the LCD screen 120 to be connected to other electrical components.

[0074] In some embodiments, the mounting member 400 is a whole, all the first liquid cooling chambers A and all the second liquid cooling chambers B are connected in series to form an inner cavity of the mounting member 400, a liquid inlet and a liquid outlet are provided on the mounting member 400, the projection optical machine 10 further includes a first pipeline 710 and a second pipeline 720, the outlet 302 is connected to the liquid outlet through the first pipeline 710, and the end of the heat exchange channel 201 away from the inlet 301 is connected to the liquid inlet through the second pipeline 720.

[0075] In this way, the sealing and reliability of the connection between the first liquid cooling chamber A and the second liquid cooling chamber B or between each other can be improved, and the cooling liquid flow between the first liquid cooling chamber A and the second liquid cooling chamber B or between each other can be increased, thereby improving the heat dissipation effect of the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140 and the third light-transmitting element 150, thereby improving the heat dissipation effect of the projection optical machine 10; and while dissipating the heat to all the first liquid cooling chambers A and all the second liquid cooling chambers B, the number of pipeline settings can also be reduced, which can reduce the cost of the projection optical machine 10 to a certain extent.

[0076] In some embodiments, among the two groups of optical components 100, the spacing arrangement direction of the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140 and the third light-transmitting element 150 of one optical component 100 intersects with the spacing arrangement direction of the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140 and the third light-transmitting element 150 of the other optical component 100.

[0077] In this way, in the two groups of optical components 100, the flow path between the first liquid cooling cavity A and the second liquid cooling cavity B on one optical component 100 and the first liquid cooling cavity A and the second liquid cooling cavity B on the other optical component 100 is extended in a non-linear shape, which is beneficial to prolonging the time for the coolant to flow through the corresponding first liquid cooling cavity A and the corresponding second liquid cooling cavity B, thereby improving the heat dissipation effect of the corresponding optical component 100.

[0078] In some embodiments, see Figure 1 and Figure 2 The projector 10 includes two optical components 100, wherein in one optical component 100, the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140 and the third light-transmitting element 150 are arranged at intervals along the first direction F1. In the other optical component 100, in the optical component 100, the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140 and the third light-transmitting element 150 are arranged at intervals along the second direction F2. The first direction F1 and the second direction F2 are perpendicular to each other.

[0079] Compared with the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140 and the third light-transmitting element 150 of the two optical components 100, which are arranged in the same direction at intervals, in this embodiment, the two optical components 100 are arranged in directions perpendicular to each other, which is beneficial to reducing the overall occupied space of the two optical components 100, and also allows the flow path between the first liquid cooling cavity A and the second liquid cooling cavity B on one optical component 100 and the first liquid cooling cavity A and the second liquid cooling cavity B on the other optical component 100 to extend in a non-linear shape, thereby improving the heat dissipation effect of the optical component 100.

[0080] In some embodiments, each optical component 100 also includes a light source 160 arranged on the side of the corresponding third light-transmitting element 150 away from the corresponding first Fresnel lens 140, wherein the light emitted by the light source 160 of one optical component 100 is red light, and the light emitted by the light source 160 of another optical component 100 is blue-green light, and the projector 10 also includes a lens 500 and a first dimming component 610, and the first dimming component 610 is respectively arranged at an angle to the first direction F1 and the second direction F2, so that the light emitted by one of the optical components 100 can pass through the first dimming component 610 and be incident on the lens 500, and the light emitted by the other optical component 100 can be reflected to the lens 500 with the help of the first dimming component 610.

[0081] For example, the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140, the third light-transmitting element 150 and the light source 160 of the first group of optical components 100 are arranged at intervals along the first direction F1, and the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140, the third light-transmitting element 150 and the light source 160 of the second group of optical components 100 are arranged at intervals along the second direction F2, and the light emitted by the light source 160 of the first group of optical components 100 is red light, and the light emitted by the light source 160 of the second group of optical components 100 is blue-green light, and the first dimming component 610 is a red filter.

[0082] In this way, the red light emitted by the light source 160 of one optical component 100 can pass through the corresponding third light-transmitting element 150, the first Fresnel lens 140, the second light-transmitting element 130, the LCD screen 120 and the first light-transmitting element 110 in sequence, and be incident on the lens 500 through the first dimming component 610, and the blue-green light emitted by the light source 160 of the other optical component 100 can pass through the corresponding third light-transmitting element 150, the first Fresnel lens 140, the second light-transmitting element 130, the LCD screen 120 and the first light-transmitting element 110 in sequence, and be reflected to the lens 500 with the help of the first dimming component 610, so that the projection of color images can be realized.

[0083] In this embodiment, each optical assembly 100 further includes a light focusing rod 170 disposed between the corresponding light source 160 and the corresponding third light-transmitting element 150 .

[0084] The focusing rod 170 can be used to focus the light emitted by the corresponding light source 160 onto the corresponding third light-transmitting element 150 , which is beneficial to improving the projection effect of the projection light engine 10 .

[0085] In this embodiment, each optical assembly 100 further includes a second Fresnel lens 180 disposed on a side of the corresponding first light-transmitting element 110 facing away from the corresponding LCD screen 120 .

[0086] In this way, the red light emitted by the light source 160 of one optical component 100 can pass through the corresponding focusing rod 170, the third light-transmitting element 150, the first Fresnel lens 140, the second light-transmitting element 130, the LCD screen 120, the first light-transmitting element 110 and the second Fresnel lens 180 in sequence, and enter the lens 500 through the first dimming component 610. The blue-green light emitted by the light source 160 of the other optical component 100 can pass through the corresponding focusing rod 170, the third light-transmitting element 150, the first Fresnel lens 140, the second light-transmitting element 130, the LCD screen 120, the first light-transmitting element 110 and the second Fresnel lens 180 in sequence, and be reflected to the lens 500 through the first dimming component 610, so as to better realize the projection of color images.

[0087] In this embodiment, the light-emitting sides of the two optical components 100 define a receiving groove C, and the first dimming component 610 is disposed in the receiving groove C.

[0088] In this way, the receiving groove C can be used to accommodate the first dimming component 610, which is beneficial to reduce the occupied space of the projection optical engine 10 while also realizing the projection of color images.

[0089] In some embodiments, see Figure 3 and Figure 4 The projection optical machine 10 includes three groups of optical components 100, wherein the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140 and the third light-transmitting element 150 of one group of optical components 100 are arranged at intervals along the first direction F1, and the other two groups of optical components 100 are arranged on opposite sides of the one group of optical components 100 along the second direction F2, and the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140 and the third light-transmitting element 150 of the other two groups of optical components 100 are arranged at intervals along the second direction F2, wherein the first direction F1 and the second direction F2 are perpendicular to each other.

[0090] Compared with the three optical components 100 in which the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140 and the third light-transmitting element 150 are arranged in the same direction at intervals, in this embodiment, the three optical components 100 are arranged in a roughly U-shaped shape, which is conducive to reducing the overall occupied space of the three optical components 100, and can also make the flow path between the first liquid cooling cavity A and the second liquid cooling cavity B on one optical component 100 in two adjacent optical components 100 extend in a non-linear shape, thereby improving the heat dissipation effect of the optical component 100.

[0091] In this embodiment, each optical component 100 also includes a light source 160 arranged on the side of the corresponding third light-transmitting element 150 away from the corresponding first Fresnel lens 140. The light emitted by the light sources 160 of the three groups of optical components 100 are red light, green light and blue light respectively. The projection optical machine 10 also includes a lens 500, a second dimming component 620 and a third dimming component 630. The light emitted by one optical component 100 is incident on the lens 500 through the second dimming component 620 and the third dimming component 630, the light emitted by another optical component 100 is incident on the third dimming component 630 through the second dimming component 620, and is reflected to the lens 500 with the help of the third dimming component 630, and the light emitted by another optical component 100 is incident on the second dimming component 620 through the third dimming component 630, and is reflected to the lens 500 with the help of the second dimming component 620.

[0092] Specific to Figure 3 and Figure 4 In the illustrated embodiment, the light emitted by the light source 160 of the first optical assembly 100 is red light, the light emitted by the light source 160 of the second optical assembly 100 is green light, and the light emitted by the light source 160 of the third optical assembly 100 is blue light, and the first light-transmitting element 110, the LCD screen 120, the second light-transmitting element 130, the first Fresnel lens 140 and the third light-transmitting element 150 of the first optical assembly 100 are arranged at intervals along the second direction F1, and the second optical assembly 100 and the third optical assembly 100 are arranged on the left and right sides of the first optical assembly 100 along the second direction F2. The second dimming component 620 is a red-green filter, and the third dimming component 630 is a red-blue filter.

[0093] Thus, the red light emitted by the light source 160 of one optical assembly 100 can sequentially pass through the corresponding third light-transmitting element 150, the first Fresnel lens 140, the second light-transmitting element 130, the LCD screen 120 and the first light-transmitting element 110, and enter the lens 500 through the second dimming component 620 and the third dimming component 630, and the green light emitted by the light source 160 of the other optical assembly 100 can sequentially pass through the corresponding third light-transmitting element 150, the first Fresnel lens 140, the second light-transmitting element 130, the LCD screen 120 and the first light-transmitting element 110. The blue light emitted by the optical component 100 passes through the corresponding third light-transmitting element 150, the first Fresnel lens 140, the second light-transmitting element 130, the LCD screen 120 and the first light-transmitting element 110 in sequence, and is incident on the second light-modulating element 620 through the third light-modulating element 630, and is reflected to the lens 500 with the help of the third light-modulating element 630, so as to realize the projection of color images.

[0094] In this embodiment, each optical assembly 100 may further include a focusing rod 170 disposed between the corresponding light source 160 and the corresponding third light-transmitting element 150 , and a second Fresnel lens 180 disposed on a side of the corresponding first light-transmitting element 110 away from the corresponding LCD screen 120 .

[0095] In this embodiment, a accommodating cavity Q is formed around the light-emitting side of the three groups of optical components 100, the second dimming component 620 and the third dimming component 630 are cross-arranged with each other and are located in the accommodating cavity Q, the second dimming component 620 is respectively arranged at an angle to the first direction F1 and the second direction F2, and the third dimming component 630 is respectively arranged at an angle to the first direction F1 and the second direction F2.

[0096] Specifically, the second dimming member 620 and the third dimming member 630 are perpendicularly crossed to each other.

[0097] In this way, the accommodating cavity Q can be used to accommodate the second dimming component 620 and the third dimming component 630, thereby helping to reduce the occupied space of the projection optical machine 10 while also realizing the projection of color images.

[0098] When the projection optical machine 10 of the present application is used, on the one hand, liquid cooling can be used to dissipate heat well for the first light-transmitting element 110, LCD screen 120, second light-transmitting element 130, first Fresnel lens 140 and third light-transmitting element 150 of the optical assembly 100, thereby improving the heat dissipation effect of at least two groups of optical assemblies 100 and the heat dissipation effect of the projection optical machine 10. On the other hand, the light sources 160 of at least two groups of optical assemblies 100 can emit light of different colors, thereby realizing the projection of color images.

[0099] The present application also provides a projector, including the above-mentioned projection optical engine 10, and the projector has a good heat dissipation effect.

[0100] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0101] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A projection optical machine, characterized in that: comprising at least two sets of optical components; Each of the optical components comprises a first light-transmitting element, an LCD screen, a second light-transmitting element, a first Fresnel lens and a third light-transmitting element which are arranged at intervals; The LCD screen comprises a screen body, and a first liquid cooling cavity for accommodating the screen body is defined between the first light-transmitting element and the second light-transmitting element; A second liquid cooling cavity is defined between the first Fresnel lens and the third light-transmitting element; In all the optical components, all the first liquid-cooling cavities and all the second liquid-cooling cavities are arranged in series and / or in parallel.

2. The projection optical machine according to claim 1, characterized in that: In all the optical components, all the first liquid-cooling cavities and all the second liquid-cooling cavities are arranged in series.

3. The projection optical machine according to claim 2, characterized in that: The projection optical machine also includes a heat exchanger and a pump; The heat exchanger has a heat exchange channel, and the pump has an inlet and an outlet; The one located most upstream among all the first liquid cooling cavities and all the second liquid cooling cavities is communicated with the outlet, the inlet is communicated with one end of the heat exchange channel, and the other end of the heat exchange channel is communicated with the one located most downstream among all the first liquid cooling cavities and all the second liquid cooling cavities.

4. The projection optical machine according to any one of claims 1 to 3, characterized in that: The projection optical machine also includes a mounting member; The mounting member is provided with at least two first openings, at least two second openings, at least two third openings and at least two fourth openings corresponding to at least two groups of optical components; In the same optical component, the first light-transmitting element is sealed and connected to the side wall of the corresponding first opening, and the second light-transmitting element is sealed and connected to the side wall of the corresponding second opening; and / or, in the same optical component, the first Fresnel lens is sealed and connected to the side wall of the corresponding third opening, and the third light-transmitting element is sealed and connected to the side wall of the corresponding fourth opening.

5. The projection optical machine according to any one of claims 1 to 3, characterized in that: The projection optical machine includes two groups of optical components; In one of the optical assemblies, the first light-transmitting element, the LCD screen, the second light-transmitting element, the first Fresnel lens and the third light-transmitting element are arranged at intervals along a first direction; In another optical assembly, the first light-transmitting element, the LCD screen, the second light-transmitting element, the first Fresnel lens and the third light-transmitting element are arranged at intervals along the second direction; The first direction and the second direction are perpendicular to each other.

6. The projection optical machine according to claim 5, characterized in that: Each of the optical components further comprises a light source disposed on a side of the corresponding third light-transmitting element away from the corresponding first Fresnel lens; The light emitted by the light source of one of the optical components is red light, and the light emitted by the light source of the other optical component is blue-green light; The projector also includes a lens and a first dimming component, and the first dimming component is arranged at an angle to the first direction and the second direction respectively, so that the light emitted by one of the optical components can be incident on the lens through the first dimming component, and the light emitted by another optical component can be reflected to the lens with the help of the first dimming component.

7. The projection optical machine according to any one of claims 1 to 3, characterized in that: The projection optical machine includes three groups of optical components; The first light-transmitting element, the LCD screen, the second light-transmitting element, the first Fresnel lens and the third light-transmitting element of one group of the optical components are arranged at intervals along a first direction, and the other two groups of the optical components are arranged on opposite sides of the one group of the optical components along a second direction, and the first light-transmitting element, the LCD screen, the second light-transmitting element, the first Fresnel lens and the third light-transmitting element of the other two groups of the optical components are arranged at intervals along the second direction; The first direction and the second direction are perpendicular to each other.

8. The projection optical machine according to claim 7, characterized in that: Each of the optical components further comprises a light source disposed on a side of the corresponding third light-transmitting element away from the corresponding first Fresnel lens; The light sources of the three groups of optical components emit red light, green light and blue light respectively; The projector also includes a lens, a second dimming component and a third dimming component, wherein light emitted by one of the optical components is incident on the lens through the second dimming component and the third dimming component, light emitted by another optical component is incident on the third dimming component through the second dimming component and is reflected to the lens with the help of the third dimming component, and light emitted by yet another optical component is incident on the second dimming component through the third dimming component and is reflected to the lens with the help of the second dimming component.

9. The projection optical machine according to claim 8, characterized in that: The light-emitting sides of the three groups of optical components are surrounded by a receiving cavity, and the second dimming component and the third dimming component are arranged crosswise with each other and are located in the receiving cavity; The second dimming component is arranged at an angle to the first direction and the second direction respectively; The third dimming component is disposed at an angle to the first direction and the second direction respectively.

10. A projector, characterized in that: It comprises a projection optical machine as described in any one of claims 1 to 9.

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