A projection device

Abstract

The application discloses a projection device, and relates to the technical field of projection equipment. The projection device comprises a shell, an optical engine module and a plurality of barriers. The optical engine module is arranged in the shell and comprises a light source module, a fluorescent wheel module and a light valve module. The plurality of barriers are arranged in the optical engine module at intervals to divide the optical engine module into a light source area, a fluorescent wheel area and a light valve area. The light source module is located in the light source area, the fluorescent wheel module is located in the fluorescent wheel area, and the light valve module is located in the light valve area. The light source area, the fluorescent wheel area and the light valve area form heat dissipation channels with the shell. The application can minimize the heat crosstalk between the areas of two adjacent heat sources.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of projection equipment, in particular to a projection device. BACKGROUND

[0002] On the one hand, as the brightness of the projection device continues to improve, the power consumption of the whole projection device continues to increase, and correspondingly, the optical power and the optical power density projected onto each optical device inside the optical engine also continue to increase. On the other hand, in order to ensure the reliability / life of each optical device, the permissible temperature of the optical device will continue to decrease.

[0003] Therefore, in the prior art, heat dissipation channels are often used for air cooling heat dissipation, but the temperature distribution of heat sources at different positions inside the optical engine is different, some positions have high heat source temperature and some positions have low heat source temperature. When air cooling heat dissipation is used to dissipate heat from the optical engine, there is often serious heat crosstalk between heat sources at different positions inside the optical engine, which reduces the heat dissipation efficiency of the optical engine. SUMMARY

[0004] Therefore, in order to solve the above technical problems, the present application provides a projection device.

[0005] To achieve the above purpose, the present application provides a projection device, which comprises a shell, an optical engine module and a plurality of partition pieces; wherein,

[0006] The optical engine module is arranged in the shell and comprises a light source module, a fluorescent wheel module and a light valve module; the plurality of partition pieces are arranged in the optical engine module to divide the interior of the optical engine module into a light source area, a fluorescent wheel area and a light valve area; wherein the light source module is located in the light source area, the fluorescent wheel module is located in the fluorescent wheel area, and the light valve module is located in the light valve area; the light source area, the fluorescent wheel area and the light valve area form heat dissipation channels with the shell.

[0007] Beneficial effects: Different from the prior art, the optical engine module of the present application is arranged in the shell and comprises a light source module, a fluorescent wheel module and a light valve module; the plurality of partition pieces are arranged in the optical engine module to divide the interior of the optical engine module into a light source area, a fluorescent wheel area and a light valve area; wherein the light source module is located in the light source area, the fluorescent wheel module is located in the fluorescent wheel area, and the light valve module is located in the light valve area; the light source area, the fluorescent wheel area and the light valve area form heat dissipation channels with the shell. Through the above manner, the regions where the heat sources such as the light source module, the fluorescent wheel module and the light valve module are located are separated by the partition pieces, so that the partition pieces can separate the air flow between the regions where the adjacent two heat sources are located, thereby reducing the heat crosstalk between the regions where the adjacent two heat sources are located. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1is a structural schematic diagram of an embodiment of the projection device of the present application;

[0009] Figure 2 is Figure 1 is a structural schematic diagram of an optical engine module of the present application;

[0010] Figure 3 is Figure 1 is a distribution state schematic diagram of a plurality of heat dissipation flow channels of the projection device of the present application;

[0011] Figure 4 is Figure 1 is a structural schematic diagram of the optical engine module of the present application after hiding the fan assembly;

[0012] Figure 5 is a structural schematic diagram of another embodiment of the projection device of the present application;

[0013] Figure 6 is Figure 5 is a distribution state schematic diagram of a plurality of heat dissipation flow channels of the projection device of the present application;

[0014] Figure 7 is Figure 6 is a structural schematic diagram of a first partition plate of the projection device of the present application;

[0015] Figure 8 is a structural schematic diagram of an embodiment of the heat dissipation module provided by the present application;

[0016] Figure 9 is a structural schematic diagram of an embodiment of the heat dissipation module provided by the present application;

[0017] Figure 10 is a structural schematic diagram of an embodiment of the heat dissipation module provided by the present application;

[0018] Figure 11 is a structural schematic diagram of an embodiment of the heat dissipation module provided by the present application;

[0019] Figure 12 is Figure 11 is a structural enlarged schematic diagram of an A area of the present application. DETAILED DESCRIPTION

[0020] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be described in further detail below in combination with the drawings and specific embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.

[0021] Please refer to Figures 1-3 , Figure 1is a structural schematic diagram of an embodiment of the projection device of the present application;

[0022] Figure 2 is Figure 1 is a structural schematic diagram of an optical engine module in the present application; Figure 3 is Figure 1 is a distribution state diagram of a plurality of heat dissipation flow channels in the projection device. The projection device 10 can be a DMD cinema projector, an engineering projector, a home projector, etc.

[0023] As shown in Figures 1-3 , the projection device 10 comprises a housing 100, an optical engine module 200, and a plurality of partitioning members 300.

[0024] As shown in Figure 1 and Figure 2 , the optical engine module 200 is arranged in the housing 100 and comprises a light source module 211, a fluorescent wheel module (not shown in the figure), and a light valve module 231. The plurality of partitioning members 300 are arranged in the optical engine module 200 in a spaced manner to divide the interior of the optical engine module 200 into a light source area 210, a fluorescent wheel area 220, and a light valve area 230. The light source module 211 is located in the light source area 210, the fluorescent wheel module is located in the fluorescent wheel area 220, and the light valve module 231 is located in the light valve area 230. The light source area 210, the fluorescent wheel area 220, and the light valve area 230 form heat dissipation flow channels 400 with the housing 100.

[0025] In the present application, an object or mechanism that generates heat is referred to as a heat source. In the above manner, the light source module 211, the fluorescent wheel module, and the light valve module 231 are separated by the plurality of partitioning members 300. In this way, the partitioning members 300 can separate the air flow between the areas where the two adjacent heat sources are located, thereby reducing the heat cross talk between the areas where the two adjacent heat sources are located.

[0026] Optionally, the partitioning members 300 are lenses, transparent glass sheets, or color filters, etc. That is, the partitioning members 300 can utilize the inherent optical elements in the optical engine module 200, such as lenses with light adjusting capability, transparent flat glass sheets, or color filters of different types, etc. The partitioning members 300 not only have their own optical functions (such as light adjusting, brightness increasing, color filtering, etc.) in the optical engine module, but also can separate the air flow between the areas where the two adjacent heat sources are located, which is conducive to reducing the volume of the optical engine module 200.

[0027] As shown in Figure 3 , the heat dissipation flow channels 400 can comprise a first heat dissipation flow channel 410, a second heat dissipation flow channel 420, and a third heat dissipation flow channel 430. The light source area 210, the fluorescent wheel area 220, and the light valve area 230 are arranged in sequence along the extension direction of the optical engine module 200.

[0028] As shown in Figure 2 , as above, the light source module 211, the fluorescent wheel module and the light valve module 231 can be referred to as heat sources.

[0029] As shown in Figure 2 , the light source module 211, the fluorescent wheel module and the light valve module 231 can be sequentially connected in the light path. Among them, the light emitted by the light source module 211 can be combined and incident on the fluorescent wheel module, and the fluorescent wheel module can generate excited fluorescent light under the irradiation of the corresponding excitation light emitted by the light source module 211. In other embodiments, the fluorescent wheel module can filter and / or uniformize and / or diffuse the light emitted by the light source module 211 or the excited fluorescent light generated by itself. The fluorescent wheel module can incident the filtered and / or uniformized and / or diffused light on the light valve module 231. The light valve module 231 can modulate the light incident on itself to generate an image light beam.

[0030] Optionally, a prism group 233 can be arranged in the light valve area 230, and the light emitted by the fluorescent wheel module is totally reflected by the prism group 233 and then incident on the light valve module 231.

[0031] Further, as shown in Figure 1 , the projection device includes a first partition plate 510 and a second partition plate 520. As shown in Figures 1-3 , the first partition plate 510 is arranged on one side of the extension direction of the optical engine module 200, and the first partition plate 510, the fluorescent wheel area 220, the light source area 210 and part of the shell 100 enclose a first heat dissipation flow channel 410; the second partition plate 520 is arranged on the other side of the extension direction of the optical engine module 200, and the second partition plate 520, the light valve area 230, the fluorescent wheel area 220, the light source area 210 and another part of the shell 100 enclose a second heat dissipation flow channel 420. Among them, the shell 100 is located at the part of the light valve area 230 away from the fluorescent wheel area 220, and the light valve area 230 and the second partition plate 520 enclose a third heat dissipation flow channel 430.

[0032] By the above manner, the first heat dissipation flow channel 410 and the second heat dissipation flow channel 420 can be located at two sides of the extension direction of the optical engine module 200 respectively, so that the first heat dissipation flow channel 410 and the second heat dissipation flow channel 420 are separated by the optical engine module 200, and the air flow between the first heat dissipation flow channel 410 and the second heat dissipation flow channel 420 is separated, so that the heat interference between the first heat dissipation flow channel 410 and the second heat dissipation flow channel 420 can be reduced. The third heat dissipation flow channel 430 and the first heat dissipation flow channel 410 are separated by the first partition plate 510, so that the air flow between the third heat dissipation flow channel 430 and the first heat dissipation flow channel 410 is separated by the first partition plate 510, so that the heat interference between the third heat dissipation flow channel 430 and the first heat dissipation flow channel 410 can be reduced. The third heat dissipation flow channel 430 and the second heat dissipation flow channel 420 are separated by the second partition plate 520, so that the air flow between the third heat dissipation flow channel 430 and the second heat dissipation flow channel 420 is separated by the second partition plate 520, so that the heat interference between the third heat dissipation flow channel 430 and the second heat dissipation flow channel 420 can be reduced.

[0033] As shown in Figure 3 The projection device can include a first fan assembly 411, a second fan assembly 421 and a third fan assembly 431.

[0034] The first fan assembly 411 is used to guide air into the first heat dissipation flow channel 410 to form a first heat dissipation air flow a1. The second fan assembly 421 is used to guide air into the second heat dissipation flow channel 420 to form a second heat dissipation air flow a2. The third fan assembly 431 is used to guide air into the third heat dissipation flow channel 430 to form a third heat dissipation air flow a3.

[0035] By the above manner, the corresponding heat dissipation air flow is formed by the fan assembly to dissipate heat for the optical engine module, so that the heat dissipation efficiency can be improved. Compared with the prior art which only uses one heat dissipation flow channel to dissipate heat for each region in the optical engine module, the present embodiment can use a heat dissipation flow channel 400 with a smaller length to dissipate heat, so that the fan assembly arranged in the heat dissipation flow channel 400 can have a smaller rotating speed, so as to reduce the noise, thereby optimizing the noise experience of the projection device 10.

[0036] As shown in Figure 3As shown, the first heat dissipation airflow a1 in the first heat dissipation channel 410 flows out of the housing 100 sequentially along the arrangement direction of the phosphor wheel region 220 and the light source region 210. The second heat dissipation airflow a2 in the second heat dissipation channel 420 flows out of the housing 100 sequentially along the arrangement direction of the light valve region 230, the phosphor wheel region 220, and the light source region 210. The third heat dissipation airflow a3 in the third heat dissipation channel 430 can flow out of the housing 100 sequentially along the arrangement direction of the light valve region 230 and the second partition plate 520.

[0037] By means of the above method, the airflow direction in the first heat dissipation channel 410 and the second heat dissipation channel 420 located on both sides of the optical engine module 200 is kept consistent, thereby reducing heat crosstalk between the first heat dissipation channel 410 and the second heat dissipation channel 420.

[0038] Optionally, such as Figure 3 As shown, the projection device 10 may include a fourth fan assembly 422. Optionally, the optical engine module 200 may extend linearly into a single line. Figure 3 As shown, the light source module 210 can be disposed at one end of the housing 100, and the end of the light source region 210 facing away from the phosphor wheel region 220 extends to the side edge of the housing 100; the end of the light valve region 230 facing away from the phosphor wheel region 220 extends toward the other end of the housing 100. Figure 3 As shown, the air inlet of the first heat dissipation channel 410 is located on the side of the housing 100 adjacent to the first partition plate 510 and opposite to the side of the fluorescent wheel area 220 adjacent to the first partition plate 510, and the air outlet of the first heat dissipation channel 410 is located on the side of the housing 100 adjacent to the light source area 210. Figure 3 As shown, the air inlet of the second heat dissipation channel 420 is located on the side of the housing 100 adjacent to the second partition plate 520 and opposite to the side of the light valve area 230 adjacent to the second partition plate 520. The air outlet of the second heat dissipation channel 420 is located on the side of the housing 100 adjacent to the light source area 210. The air inlet of the third heat dissipation channel 430 can be located on the same side of the housing 100 as the air inlet of the first heat dissipation channel 410, and the air inlet of the third heat dissipation channel 430 is separated from the air inlet of the first heat dissipation channel 410 by the first partition plate 510. The air outlet of the third heat dissipation channel 430 can be located on the side of the housing 100 opposite to the second partition plate 520. The first fan assembly 411 can be located adjacent to the air inlet of the first heat dissipation channel 410, the second fan assembly 421 can be located adjacent to the air inlet of the second heat dissipation channel 420, and the third fan assembly 431 can be located adjacent to the air inlet of the third heat dissipation channel 430. The fourth fan assembly 422 may be disposed adjacent to the air outlet of the second heat dissipation channel 420, and is used to draw the second heat dissipation airflow a2 in the second heat dissipation channel 420 out of the housing 100.

[0039] like Figures 1-4As shown, the projection device includes a lens 700, which is located on the side of the first partition plate 510 facing away from the first heat dissipation channel 410. One end of the lens 700 is connected to the light path of the light valve module 230, and the other end of the lens 700 extends towards the direction away from the extension direction of the optical engine module 200.

[0040] In this way, the third heat dissipation channel 430 can be used to dissipate heat from the lens 700. In other embodiments (not shown), the extension direction of the lens 700 is the same as the extension direction of the optical engine module 200. In this embodiment, since the extension direction of the lens 700 is different from the extension direction of the optical engine module 200, the size of the projection device 10 in the extension direction of the optical engine module 200 can be smaller than that of the projection device in the extension direction of the optical engine module in the other embodiments.

[0041] Further, as shown, Figure 1 The projection device includes a circuit board assembly 800, which is arranged in the third heat dissipation channel 430. In this way, the third heat dissipation channel 430 can be used to dissipate heat from the circuit board assembly 800. The circuit board assembly 800 can include a power board (not shown), and / or a TV board (not shown), and / or a control board (not shown), and / or a display board (not shown). Taking the case where the circuit board assembly 800 includes a power board and a control board as an example, the power board can be arranged on the upwind side of the control board to avoid or reduce the heat interference of the control board on the power board.

[0042] In this way, the heat dissipation channels 400 can be reasonably distributed to dissipate heat from the circuit parts such as the circuit board assembly 800, and the optical parts such as the light valve module 231, the fluorescent wheel module, and the light source module 211, thereby reducing the heat interference between the circuit parts and the optical parts.

[0043] Referring to Figure 4 , Figure 4 is Figure 1 a structural schematic view of the optical engine module after hiding the fan assembly.

[0044] As shown, Figure 4 A heat dissipation module 600 can be arranged in the heat dissipation channel 400 to dissipate heat from the corresponding area in the optical engine module 200. Specifically, the projection device 10 can include a plurality of heat dissipation modules 600, which are arranged corresponding to a plurality of heat dissipation channels 400, and each heat dissipation channel 400 is provided with at least one heat dissipation module 600.

[0045] Optionally, as Figures 1-4As shown, in an embodiment, the plurality of heat dissipation modules 600 includes a first heat dissipation module 610. The first heat dissipation module 610 is arranged in the second heat dissipation channel 420, and is used for dissipating heat of the light valve module 231. A part of the first heat dissipation module 610 can be embedded in the light valve area 230 and exposed in the light valve area 230, and another part of the first heat dissipation module 610 is exposed in the second heat dissipation channel 420. The light valve module 231 can be arranged on the part of the first heat dissipation module 610 exposed in the light valve area 230 to exchange heat with the first heat dissipation module 610.

[0046] Optionally, the plurality of heat dissipation modules 600 includes a second heat dissipation module 620, a heat conduction member 630 and a third heat dissipation module 640. The second heat dissipation module 620 can be arranged in the third heat dissipation channel 430, and is used for dissipating heat generated by the ineffective light projection of the light valve module 231. The light valve module 231 can be a liquid crystal display (LCD), a liquid crystal on silicon (LCOS), or a digital micromirror device (DMD). The light emitted by the light valve module 231 can be divided into effective light (also referred to as ON light) and ineffective light (OFF light). Specifically, the effective light, as shown by the solid arrow, is the image light beam used by the light valve module 231 to project outward to form a projection image. The ineffective light, as shown by the dashed arrow, is the light projected by the light valve module 231 to the shell wall of the light valve area 230 or the shell wall of the lens. Figure 2 Figure 2 Specifically, the ineffective light, as shown by the dashed arrow, is the light projected by the light valve module 231 to the shell wall of the light valve area 230 or the shell wall of the lens.

[0047] The third heat dissipation module 640 is arranged in the second heat dissipation channel 420, and the heat conduction member 630 is connected to the second heat dissipation module 620 and the third heat dissipation module 640 respectively, and is used for conducting part of the heat of the second heat dissipation module 620 to the third heat dissipation module 640.

[0048] In this way, the second heat dissipation channel 420 and the third heat dissipation channel 430 can be used to dissipate the heat of the light valve module 231 itself and the heat caused by the ineffective light of the light valve module 231, so as to reduce the heat crosstalk between them.

[0049] Optionally, the first heat dissipation module 610 can be located on the upwind side of the third heat dissipation module 640, so as to reduce or avoid the heat crosstalk of the first heat dissipation module 610 to the third heat dissipation module 640.

[0050] As shown in FIG. 6, the first heat dissipation module 610 is arranged in the second heat dissipation channel 420, and the second heat dissipation module 620 is arranged in the third heat dissipation channel 430. Figure 2 ​As shown, the light source module 211 can include at least two groups of sub-light sources, the projection device 10 includes a light combining assembly (not shown in the figure) and a fourth heat dissipation module 650 and a fifth heat dissipation module 660.

[0051] The at least two groups of sub-light sources are divided into the first sub-light sources 213 adjacent to one side of the first heat dissipation flow channel 410 and the second sub-light sources 214 adjacent to one side of the second heat dissipation flow channel 420, and the first sub-light sources 213 and the second sub-light sources 214 are arranged in a spaced manner. The light combining assembly is used to combine the light emitted by the first sub-light sources 213 and the second sub-light sources 214 and then to project the combined light to the fluorescent wheel module. The fourth heat dissipation module 650 is arranged in the first heat dissipation flow channel 410 and adjacent to the fluorescent wheel area 220 and the light source area 210, and is used to dissipate heat for the fluorescent wheel module and the first sub-light sources 213; and the fifth heat dissipation module 660 is arranged in the second heat dissipation flow channel 420 and adjacent to the light source area 210, and is used to dissipate heat for the second sub-light sources 214.

[0052] In the above manner, the light source module 211 is divided into the first sub-light sources 213 adjacent to one side of the first heat dissipation flow channel 410 and the second sub-light sources 214 adjacent to one side of the second heat dissipation flow channel 420, and the first sub-light sources 213 and the second sub-light sources 214 are separately cooled by the first heat dissipation flow channel 410 and the second heat dissipation flow channel 420, so that the heat dissipation efficiency of the light source module 211 can be improved.

[0053] Optionally, the third heat dissipation module 640 can be located at the upwind side of the fifth heat dissipation module 660, so that the heat interference of the fifth heat dissipation module 660 on the third heat dissipation module 640 can be reduced or avoided.

[0054] Referring to Figures 5-7 , Figure 5 is a structural schematic view of another embodiment of the projection device of the present application;

[0055] Figure 6 is Figure 5 is a distribution state schematic view of a plurality of heat dissipation flow channels of the projection device in the embodiment; Figure 7 is Figure 6 is a structural schematic view of the first partition plate of the projection device in the embodiment.

[0056] The projection device 10a of another embodiment of the projection device is obtained by modifying the projection device 10 of the above-mentioned embodiment of the projection device, and the modification is to modify the structure of the first partition plate 510. The modified part is described below.

[0057] As Figures 5-7As shown, the first partition plate 510a is located between the side of the phosphor wheel region 220 and the side of the light valve region 230, and the first partition plate 510a is provided with a guide hole 511a; the first partition plate 510a, the phosphor wheel region 220, the light source region 210, and the portion of the housing 100 located in the phosphor wheel region 220 and the light source region 210 adjacent to the side of the first partition plate 510a form a first heat dissipation channel 410; the first partition plate 510, the light valve region 230, and the portion of the housing 100 located in the light valve region 230 adjacent to the side of the first partition plate 510a form a guide channel 440, and the guide channel 440 correspondingly connects the guide hole 511a and the third heat dissipation channel 430 to guide part of the airflow a1 in the first heat dissipation channel 410 into the third heat dissipation channel 430.

[0058] In the above manner, the airflow introduced from the guide channel 440 into the third heat dissipation channel 430 can be used to further increase the third heat dissipation airflow a3 in the third heat dissipation channel 430, so as to further improve the heat dissipation efficiency of the third heat dissipation channel 430.

[0059] Among them, such as Figures 5-7 As shown, the lens 700 can be disposed in the airflow channel 440 and optically connected to the light valve module 230. Thus, the airflow in the airflow channel 440 can be used to dissipate heat from the lens 700. Since the first partition plate 510a is adjacent to the air inlet of the first heat dissipation channel 410, the airflow introduced into the airflow channel 440 through the airflow hole 511a has a lower temperature, allowing for further heat exchange with the lens 700 to dissipate heat from the lens 700.

[0060] Other technical features of the first heat dissipation channel 410 and the third heat dissipation channel 430 in the projection device 10a of this other embodiment are the same as those of the first heat dissipation channel 410 and the third heat dissipation channel 430 in the projection device 10 of the above embodiment, and will not be described again here. The lens 700, circuit board assembly 800, optical engine module 200, multiple partitions, second heat dissipation channel 420, fan assembly, multiple heat dissipation modules 600, second partition plate 520 and other structures in the projection device 10a of this other embodiment are the same as the structures with the same names in the projection device 10 of the above embodiment, and will not be described again here.

[0061] The following specific embodiments further illustrate the scheme of using a fourth heat dissipation module for heat dissipation of the fluorescent wheel module and the first sub-light source.

[0062] See Figure 8 , Figure 8 This is a schematic diagram of an embodiment of the fourth heat dissipation module provided in this application.

[0063] The fourth heat dissipation module 650 includes a substrate 20 and multiple heat dissipation fins 30.

[0064] The fluorescent wheel module 222 and the first sub light source 213 are arranged on one side surface of the substrate 20, so that the heat generated by the fluorescent wheel module 222 and the first sub light source 213 can be conducted to the substrate 20. For example, one side surface of the substrate 20 can be exposed to the fluorescent wheel module 220 and the light source area 210, so that the fluorescent wheel module 222 and the first sub light source 213 can be arranged on the one side surface of the substrate 20. A plurality of heat dissipation fins 30 are arranged on the side surface of the substrate 20 away from the fluorescent wheel module 222 and the first sub light source 213, so that the heat conducted to the substrate 20 by the fluorescent wheel module 222 and the first sub light source 213 can be further conducted to the plurality of heat dissipation fins 30 having a larger heat dissipation area. The plurality of heat dissipation fins 30 are respectively connected with the substrate 20 and cooperatively form a heat dissipation air duct 651.

[0065] The air inlet of the heat dissipation air duct 651 can be arranged adjacent to the air inlet of the first heat dissipation flow channel 410, and the first fan assembly 411 can be arranged at the air inlet of the heat dissipation air duct 651, as shown in Figure 8 The first fan assembly 411 is arranged at the air inlet of the heat dissipation air duct 651, and the dashed line with arrows represents the path of the air flow.

[0066] Therefore, the fourth heat dissipation module 650 provided in the present application realizes that a plurality of heat sources share the substrate 20 and the heat dissipation fins 30, so that the plurality of heat sources can share the heat dissipation air duct 651 formed by the heat dissipation fins 30, which can reduce the flow field resistance in the heat dissipation air duct 651, reduce the demand for air flow, and thus reduce the noise generated when the fourth heat dissipation module 650 dissipates heat. In addition, since the plurality of heat sources are arranged on one side surface of the substrate 20, the plurality of heat sources can share the substrate 20 and the heat dissipation fins 30, which can also reduce the size of the entire fourth heat dissipation module 650, which is conducive to the miniaturization development of the projection product.

[0067] In an embodiment, the number of heat dissipation fins 30 can be more than two, for example, the number of heat dissipation fins 30 can be three, four, five or other numbers, wherein each adjacent two heat dissipation fins 30 and the substrate 20 form a heat dissipation air duct 651. Thus, when the number of heat dissipation air ducts 651 needs to be increased, the number of heat dissipation fins 30 can be increased, thereby further improving the heat dissipation capacity of the fourth heat dissipation module 650. The number of heat dissipation fins 30 can be set according to actual needs, which is not limited herein. Therefore, in the embodiments of the present application, the heat dissipation area of the fourth heat dissipation module 650 can be increased by arranging a plurality of heat dissipation fins 30, and thus the heat dissipation air duct 651 can be effectively utilized to dissipate heat of a plurality of heat sources.

[0068] The plurality of heat dissipation fins 30 can be regular square plates, wavy plates or arched plates. In other embodiments, the plurality of heat dissipation fins 30 can have other shapes, which are not limited in the present application. In an embodiment, the plurality of heat dissipation fins 30 can be vertically arranged on the surface of the substrate 20 on the side away from the fluorescent wheel module 222 and the first sub light source 213. In other embodiments, the plurality of heat dissipation fins 30 can be arranged obliquely with the substrate 20. The plurality of heat dissipation fins 30 can be regularly arranged on the substrate 20. For example, the spacing distance between the plurality of heat dissipation fins 30 can be equal. In other embodiments, the plurality of heat dissipation fins 30 can be irregularly arranged on the substrate 20.

[0069] Referring to Figure 9 , Figure 9 is an embodiment structure diagram of a fourth heat dissipation module provided by the present application.

[0070] The heat dissipation fin 30 is provided with a heat breaking groove 31 for dividing the heat dissipation fin 30 into at least two heat dissipation regions, one of which is arranged on the portion of the substrate 20 corresponding to the fluorescent wheel module 222, and the other of which is arranged on the portion of the substrate 20 corresponding to the first sub light source 213.

[0071] In an embodiment, the plurality of heat sources can be located in the length direction of the substrate 20, and the plurality of heat dissipation fins 30 can be sequentially and spaced arranged in the width direction of the substrate 20, so that the heat dissipation air duct 651 formed by the plurality of heat dissipation fins 30 and the substrate 20 can also extend in the length direction of the substrate 20. The length direction of the substrate 20 can be the extension direction of the optical engine module 200. The heat breaking groove 31 can divide the heat dissipation fin 30 into a plurality of heat dissipation regions, one of which is arranged on the portion of the substrate 20 corresponding to the fluorescent wheel module 222, and the other of which is arranged on the portion of the substrate 20 corresponding to the first sub light source 213. Thus, the heat breaking groove 31 can reduce the heat crosstalk problem between the fluorescent wheel module 222 and the first sub light source 213. In addition, when the heat generated by the first sub light source 213 is significantly more than that generated by the fluorescent wheel module 222, the position of the heat breaking groove 31 on the heat dissipation fin 30 can be designed so that the area of the heat dissipation region corresponding to the first sub light source 213 is larger than that of the heat dissipation region corresponding to the fluorescent wheel module 222, so that the fourth heat dissipation module 650 has better and more uniform heat dissipation effect on the plurality of heat sources.

[0072] The position of the heat breaking groove 31 can be set according to actual conditions to adjust the heat dissipation area of each heat dissipation region through the position set by the heat breaking groove 31. In an embodiment, the fluorescent wheel module 222 and the first sub light source 213 are arranged along the length direction of the substrate 20, the fluorescent wheel module 222 and the first sub light source 213 generate the same or substantially the same heat, and the middle of the heat dissipation fin 30 is provided with the heat breaking groove 31 to equally divide the heat dissipation fin 30 through the heat breaking groove 31. In the above manner, the area of the heat dissipation fin 30 allocated to the fluorescent wheel module 222 and the first sub light source 213 is the same, and the heat dissipation capacity of the two heat dissipation regions is the same. In another embodiment, the fluorescent wheel module 222 and the first sub light source 213 are arranged along the length direction of the substrate 20, the fluorescent wheel module 222 and the first sub light source 213 generate different heat, and the heat dissipation fin 30 is provided with the heat breaking groove 31 at the position close to the one of the fluorescent wheel module 222 and the first sub light source 213 that generates less heat to divide the area of the heat dissipation fin 30 through the heat breaking groove 31, wherein the area of the heat dissipation fin 30 corresponding to the one of the fluorescent wheel module 222 and the first sub light source 213 that generates more heat is larger, and the area of the heat dissipation fin 30 corresponding to the one that generates less heat is smaller, so that the fourth heat dissipation module 650 has better and more uniform heat dissipation effect on the fluorescent wheel module 222 and the first sub light source 213.

[0073] Thus, in the present embodiment, the heat breaking groove 31 can be arranged on the heat dissipation fin 30 to reduce the problem of heat generated between the plurality of fluorescent wheel modules 222 and the first sub light sources 213 interfering with each other through the heat breaking groove 31, and the position of the heat breaking groove 31 can be set to allocate the area of the heat dissipation fin 30 corresponding to each of the fluorescent wheel module 222 and the first sub light source 213, so as to reasonably allocate the heat dissipation fin 30, effectively utilize the heat dissipation fin 30, and facilitate the miniaturization development of the product.

[0074] Further, the heat breaking groove 31 on the heat dissipation fin 30 is arranged in multiple, and the multiple heat breaking grooves 31 are sequentially and spaced apart along a straight line direction on the heat dissipation fin 30. The number of the heat breaking grooves 31 can be two, three or other numbers, and the heat breaking grooves 31 can be arranged along a straight line direction perpendicular to the substrate 20 or along a straight line direction inclined to the substrate 20, which can be set according to actual conditions. Compared with arranging only one heat breaking groove 31 along a straight line direction, sequentially and spaced apart multiple heat breaking grooves 31 along a straight line direction on the heat dissipation fin 30 can appropriately increase the rigidity of the heat dissipation fin 30.

[0075] Further, the substrate 20 is provided with the partition groove 21, and the partition groove 21 is located in the interval region of the fluorescent wheel module 222 and the first sub light source 213.

[0076] The heat generated by the fluorescent wheel module 222 and the first sub light source 213 is first conducted to the substrate 20, and then conducted to the heat dissipation fins 30 through the substrate 20. Thus, the partition groove 21 is arranged on the substrate 20 at the interval region between the fluorescent wheel module 222 and the first sub light source 213, so that the heat cross talk phenomenon between the fluorescent wheel module 222 and the first sub light source 213 sharing one substrate 20 can be avoided. At the same time, the rigidity of the substrate 20 can be reduced through the partition groove 21, so that the fourth heat dissipation module 650 can have better large-area assembly characteristics. Specifically, in an embodiment, the fluorescent wheel module 222 and the first sub light source 213 are arranged along the length direction of the substrate 20, the partition groove 21 is arranged at the interval region between the fluorescent wheel module 222 and the first sub light source 213, and the partition groove 21 can extend along the width direction of the substrate 20, so that the thickness of the substrate 20 between the fluorescent wheel module 222 and the first sub light source 213 can be thinned through the partition groove 21, thereby avoiding the heat cross talk phenomenon between the two fluorescent wheel modules 222 and the first sub light source 213, and reducing the rigidity of the substrate 20.

[0077] Referring to Figure 10 , Figure 10 is an embodiment structure schematic diagram of the fourth heat dissipation module provided by the present application.

[0078] The fourth heat dissipation module 650 further comprises heat pipes 40, the heat pipes 40 are connected to the substrate 20 and the heat dissipation fins 30 respectively, and the heat pipes 40 are filled with refrigerant. The number of the heat pipes 40 can be one or more. In the present embodiment, the refrigerant in the heat pipes 40 can quickly transfer heat to the area of the heat dissipation fins 30 away from the substrate 20, so that the heat on the heat dissipation fins 30 is uniformly distributed, avoiding the situation that the heat is concentrated on the area of the heat dissipation fins 30 close to the substrate 20, which is not convenient for heat dissipation treatment of the heat dissipation fins 30.

[0079] Specifically, the heat pipe 40 includes a first pipe segment 41, a second pipe segment 42 and a third pipe segment 43. The first pipe segment 41 is arranged on the side surface of the substrate 20 away from the plurality of fluorescent wheel modules 222 and the first sub light source 213. The second pipe segment 42 is connected between the first pipe segment 41 and the third pipe segment 43. The third pipe segment 43 is arranged through the plurality of heat dissipation fins 30. The heat pipe 40 is arranged in a U shape. The second pipe segment 42 can be embedded in the heat dissipation fins 30 or abut against the side surface of the heat dissipation fins 30. The second pipe segment 42 can be located in the same heat dissipation region of the heat dissipation fins 30 to avoid heat interference. The third pipe segment 43 is arranged through each heat dissipation fin 30 and is fixed to the part of the heat dissipation fin 30 away from the substrate 20. In this way, the heat generated by the fluorescent wheel modules 222 and the first sub light source 213 is conducted to the substrate 20. The heat on the substrate 20 can be transmitted to the part of the heat dissipation fin 30 away from the substrate 20 through the heat pipe 40. The heat on the heat dissipation fin 30 is uniformly distributed, avoiding the heat from being concentrated on the part of the heat dissipation fin 30 close to the substrate 20, which makes it difficult to dissipate heat from the heat dissipation fin 30.

[0080] The side surface of the substrate 20 away from the fluorescent wheel modules 222 and the first sub light source 213 is provided with a pipe groove (not shown in the figure). The first pipe segment 41 of the heat pipe 40 is arranged in the pipe groove. The pipe groove can extend along the width direction of the substrate 20. The number of the pipe grooves can be the same as the number of the first pipe segments 41. In this way, by arranging the pipe grooves on the substrate 20 and arranging the first pipe segments 41 in the pipe grooves, the structure of the fourth heat dissipation module 650 can be compact. The contact area between the first pipe segments 41 and the substrate 20 is increased, and the heat transfer effect of the heat pipe 40 is improved.

[0081] Referring to Figure 11 , Figure 11 is an embodiment structure schematic diagram of the heat dissipation module provided by the present application.

[0082] Further, the air inlet of the heat dissipation air duct 651 and the substrate 20 are located on the first side and the second side of the plurality of heat dissipation fins 30 respectively. The air deflector 50 and the air outlet of the heat dissipation air duct 651 are located on the third side and the fourth side of the plurality of heat dissipation fins 30 respectively. The side of the air deflector 50 facing the air outlet of the heat dissipation air duct 651 has an air deflection inclined surface or an air deflection curved surface. Figure 11 In the embodiment, the first side and the second side can be the upper side and the lower side of the heat dissipation fin 30 respectively. The third side and the fourth side can be the left side and the right side of the heat dissipation fin 30 respectively. The third side is adjacent to the first partition plate 510.

[0083] The air guide plate 50 can be a flat plate and can be arranged to be inclined relative to the base plate 20 to form an air guide inclined surface, or the air guide plate 50 can be an arc-shaped plate to form an air guide arc surface. In other embodiments, the air guide plate 50 only needs to be able to guide the airflow in the heat dissipation air duct 651 to the air outlet on the side of the heat dissipation air duct 651 adjacent to the air outlet of the first heat dissipation flow channel 410. The air guide plate 50 is connected to the third side or the fourth side of the heat dissipation fin 30 opposite to each other, respectively, to seal the air outlet on the side of the heat dissipation air duct 651 adjacent to the first partition plate 510. When the heat dissipation fin 30 is cooled by the first fan assembly 411, the airflow in the heat dissipation air duct 651 can be guided to the air outlet on the side of the heat dissipation air duct 651 adjacent to the air outlet of the first heat dissipation flow channel 410 through the air guide plate 50, thereby reducing the noise of the airflow in the heat dissipation air duct 651. For example, in Figure 11 , the first fan assembly 411 is arranged at the air inlet of the heat dissipation air duct 651 to seal the air outlet of the heat dissipation fin 30 on the left side through the air guide plate 50, and the airflow is guided in the direction of the dashed line with an arrow in Figure 4 , thereby reducing the noise of the airflow.

[0084] It should be understood that in the embodiment in which the first partition plate 510a is provided with the flow guide hole 511a, a flow distribution plate 60 can also be further provided. One side of the flow distribution plate 60 is connected to the side of the air guide plate 50 away from the base plate 20, and the side of the flow distribution plate 60 away from the air guide plate 50 is closer to the air inlet of the heat dissipation air duct 651 and the air outlet on the side of the heat dissipation air duct 651 adjacent to the air outlet of the first heat dissipation flow channel 410 relative to the side of the flow distribution plate 60 connected to the air guide plate 50, so as to form a flow distribution surface (not marked in the figure) on the outside of the flow distribution plate 60. The flow distribution surface is used to distribute part of the airflow from the first heat dissipation airflow a1, and the flow guide hole 511a is used to guide the distributed airflow to the flow guide channel 440.

[0085] Referring to Figure 11 and Figure 12 , Figure 12 is Figure 11 an enlarged schematic view of the structure in the dashed line box in

[0086] The fluorescent wheel module 222 includes a driving member 223 and a fluorescent wheel 224. The driving member 223 is connected to the fluorescent wheel 224 and the base plate 20, respectively, and is used to drive the fluorescent wheel 224 to rotate.

[0087] The fluorescent wheel 224 rotates under the driving of the driving member 223. The first sub light source 213 and the second sub light source 214 can be lasers, which emit laser light to the fluorescent wheel 224, and the laser light is converted by the fluorescent wheel 224 to obtain excited fluorescent light. The fluorescent wheel 224 can be disc-shaped, and the circular surface of the fluorescent wheel 224 can be arranged parallel to the substrate 20. The driving member 223 is connected to the substrate 20 and the circular surface of the fluorescent wheel 224 close to the substrate 20, and the heat of the fluorescent wheel 224 can be conducted to the substrate 20 through the driving member 223. The driving member 223 can be a motor or other device capable of driving the fluorescent wheel 224 to rotate. In other embodiments, the fluorescent wheel 224 can also have other shapes, and the fluorescent wheel 224 can also be arranged non-parallel to the substrate 20, for example, the fluorescent wheel 224 can also be arranged perpendicular to the substrate 20.

[0088] The fourth heat dissipation module 650 can further include a first heat conduction member 22 arranged on the substrate 20 and located between the substrate 20 and the fluorescent wheel 224.

[0089] The first heat conduction member 22 can be multiple and regularly arranged between the fluorescent wheel 224 and the substrate 20. For example, the multiple first heat conduction members 22 can be arranged in an array on the substrate 20, and the first heat conduction member 22 can be arranged in a fin shape to increase the heat dissipation effect of the substrate 20.

[0090] The fluorescent wheel module 222 can include a second heat conduction member 225 arranged on the fluorescent wheel 224 and located between the substrate 20 and the fluorescent wheel 224.

[0091] The second heat conduction member 225 can be multiple and regularly arranged between the fluorescent wheel 224 and the substrate 20. For example, the multiple second heat conduction members 225 can be arranged in an array on the fluorescent wheel 224, and the second heat conduction member 225 can be arranged in a fin shape to increase the heat dissipation effect of the fluorescent wheel 224. In an embodiment, the fluorescent wheel 224 can be arranged parallel to the substrate 20, the first heat conduction member 22 is arranged perpendicular to the substrate 20, and the second heat conduction member 225 is arranged perpendicular to the fluorescent wheel 224, so that the first heat conduction member 22 and the second heat conduction member 225 are arranged parallel in the height direction.

[0092] Therefore, the fourth heat dissipation module 650 provided by the present application realizes that multiple heat sources share the substrate 20 and the heat dissipation fins 30, that is, multiple heat sources share one heat sink, so that multiple heat sources can share the heat dissipation air duct 651, the flow field resistance in the heat dissipation air duct 651 can be reduced, the demand for air flow is reduced, and the noise of the fourth heat dissipation module 650 is reduced. In addition, since multiple heat sources in the fourth heat dissipation module 650 share the substrate 20 and the heat dissipation fins 30, the size of the entire fourth heat dissipation module 650 can be reduced, which is beneficial to the miniaturization development of the projection product.

[0093] The above is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A projection device, characterized by The projection device comprises a housing; an optical engine module arranged in the housing, comprising a light source module, a fluorescent wheel module and a light valve module; and a plurality of partitions arranged in the optical engine module to divide the optical engine module into a light source area, a fluorescent wheel area and a light valve area; wherein the light source module is located in the light source area, the fluorescent wheel module is located in the fluorescent wheel area, and the light valve module is located in the light valve area; the light source area, the fluorescent wheel area and the light valve area form a heat dissipation flow channel with the housing.

2. The projection apparatus according to claim 1, wherein The heat dissipation flow channel comprises a first heat dissipation flow channel, a second heat dissipation flow channel and a third heat dissipation flow channel; the light source area, the fluorescent wheel area and the light valve area are arranged in sequence along the extension direction of the optical engine module, and the projection device comprises: a first partition plate arranged on one side of the extension direction of the optical engine module, and the first partition plate, the fluorescent wheel area, the light source area and part of the housing form a first heat dissipation flow channel; a second partition plate arranged on the other side of the extension direction of the optical engine module, and the second partition plate, the light valve area, the fluorescent wheel area, the light source area and another part of the housing form a second heat dissipation flow channel; wherein the housing is located in the part of the light valve area away from the fluorescent wheel area, the light valve area and the second partition plate form a third heat dissipation flow channel.

3. The projection apparatus according to claim 2, wherein The projection device comprises: a first fan assembly for guiding air into the first heat dissipation flow channel to form a first heat dissipation airflow, the first heat dissipation airflow flows out of the housing along the arrangement direction of the fluorescent wheel area and the light source area in sequence; a second fan assembly for guiding air into the second heat dissipation flow channel to form a second heat dissipation airflow, the second heat dissipation airflow flows out of the housing along the arrangement direction of the light valve area, the fluorescent wheel area and the light source area in sequence; a third fan assembly for guiding air into the third heat dissipation flow channel to form a third heat dissipation airflow.

4. The projection apparatus according to claim 2 or 3, characterized in that, The first partition plate is located between the side of the fluorescent wheel area and the side of the light valve area, and the first partition plate is provided with a flow guide hole; The first partition plate, the fluorescent wheel area and the light source area and the part of the housing adjacent to the side of the fluorescent wheel area and the light source area form a first heat dissipation flow channel; The first partition plate, the light valve area and the part of the housing adjacent to the side of the light valve area form a flow guide channel, the flow guide channel corresponds to the flow guide hole and the third heat dissipation flow channel, and is used for guiding part of the airflow in the first heat dissipation flow channel into the third heat dissipation flow channel.

5. The projection apparatus according to claim 4, wherein The projection device comprises: a circuit board assembly arranged in the third heat dissipation flow channel; a lens arranged in the flow guide channel and connected in optical path with the light valve module.

6. The projection apparatus according to any one of claims 2-4, wherein, The projection device comprises a first heat dissipation module arranged in the second heat dissipation flow channel; the first heat dissipation module is used for dissipating heat for the light valve module.

7. The projection apparatus according to any one of claims 2-4, wherein, The projection device comprises: A second heat dissipation module is arranged in the third heat dissipation channel and used for dissipating heat generated by the ineffective light projection of the light valve module. A third heat dissipation module is arranged in the second heat dissipation channel. A heat conduction member is connected to the second heat dissipation module and the third heat dissipation module and used for conducting part of heat of the second heat dissipation module to the third heat dissipation module.

8. The projection apparatus according to any one of claims 2-4, wherein, The light source module is arranged with: At least two groups of sub light sources, which are divided into first sub light sources adjacent to one side of the first heat dissipation channel and second sub light sources adjacent to one side of the second heat dissipation channel, and the first sub light sources and the second sub light sources are arranged at intervals. A light combination assembly is used for combining light emitted by the first sub light sources and the second sub light sources and then incident on the fluorescent wheel module. A fourth heat dissipation module is arranged in the first heat dissipation channel and adjacent to the fluorescent wheel area and the light source area, and used for dissipating heat of the fluorescent wheel module and the first sub light sources. A fifth heat dissipation module is arranged in the second heat dissipation channel and adjacent to the light source area, and used for dissipating heat of the second sub light sources.

9. The projection apparatus according to claim 8, wherein, The fourth heat dissipation module includes: A substrate, the fluorescent wheel module and the first sub light sources are arranged at intervals on one side surface of the substrate. A plurality of heat dissipation fins are arranged at intervals on the side surface of the substrate away from the fluorescent wheel module and the first sub light sources, and the plurality of heat dissipation fins are respectively connected to the substrate and cooperatively form a heat dissipation air duct.

10. The projection apparatus according to claim 9, wherein, The heat dissipation fins are provided with heat dissipation grooves, the heat dissipation grooves are used for dividing the heat dissipation fins into at least two heat dissipation areas, one of the heat dissipation areas is arranged on the part of the substrate corresponding to the fluorescent wheel module, and the other of the heat dissipation areas is arranged on the part of the substrate corresponding to the first sub light sources.

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