Straight cylinder type projection ray machine

Abstract

The utility model relates to the technical field of display, and discloses a straight barrel type projection ray machine which comprises a ray machine shell, an optical module and a heat dissipation module. The light machine shell comprises a first machine shell and a second machine shell, and the first machine shell and the second machine shell are connected with each other to form a containing space. The optical module is arranged in the containing space and comprises a first lens, a display panel and a second lens which are sequentially arranged in the main optical axis direction of the optical module, and an air inlet channel is formed between the first lens and the second lens. An air inlet structure communicated with the air inlet channel is arranged at the position, right opposite to the air inlet channel, of the first machine shell. An air outlet communicated with the air inlet channel is formed in the position, right opposite to the air inlet channel, of the second machine shell, the heat dissipation module comprises a fan arranged on the second machine shell, and the fan is used for exhausting air in the air inlet channel out of the light machine shell through the air outlet. According to the straight cylinder type projection ray machine, the heat dissipation efficiency can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of vertical projectors, and in particular to a straight-tube projection optical machine. Background Art

[0002] Currently, most vertical projectors use a sealed structure, and a common cooling solution is to use a centrifugal fan. However, this cooling solution is inefficient and cannot effectively dissipate heat from the vertical projector. This causes the optical components within the vertical projector to operate in a high-temperature environment for a long time, shortening the life of the vertical projector. Utility Model Content

[0003] The present application provides a straight-tube projection light engine, which can improve heat dissipation efficiency and thus increase the service life of the straight-tube projection light engine.

[0004] The present application provides a straight-tube projection optical machine, comprising an optical machine housing, an optical module, and a heat dissipation module;

[0005] The optical machine housing includes a first housing and a second housing, wherein the first housing and the second housing are connected to each other to form an accommodating space;

[0006] The optical module is disposed in the accommodating space, and includes a first lens, a display panel, and a second lens sequentially disposed along the main optical axis of the optical module, with an air inlet channel formed between the first lens and the second lens;

[0007] An air inlet structure communicating with the air inlet channel is provided at a portion of the first housing facing the air inlet channel;

[0008] The second housing is provided with an air outlet connected to the air inlet channel at a position opposite to the air inlet channel. The heat dissipation module includes a fan provided in the second housing. The fan is used to discharge the gas in the air inlet channel out of the optical machine housing through the air outlet. The arrangement direction of the air inlet structure and the air outlet is the arrangement direction of the first housing and the second housing.

[0009] The straight cylinder type projection light machine provided in the application is provided with an air inlet structure in the first machine shell, an air outlet and a fan in the second machine shell, and an air inlet channel is formed between the first lens and the second lens inside the light machine shell. The gas outside the light machine shell can enter the inside of the light machine shell through the air inlet structure, and the gas can flow in the air inlet channel, so as to exchange heat with the optical device, so that the temperature of the optical device is reduced. When the fan is turned on, the gas in the air inlet channel can be discharged from the light machine shell, so as to complete the circulating flow of the gas in the light machine shell, so as to realize the heat dissipation of the optical device. In the application, the light machine shell is designed as a semi-closed structure, so as to improve the heat dissipation efficiency inside the light machine shell, thereby increasing the service life of the straight cylinder type projection light machine.

[0010] In some possible embodiments, the first machine shell comprises a first panel and a first side plate connected to the first panel, the first panel is arranged opposite to the air outlet, and the first side plate is connected to the second machine shell.

[0011] The air inlet structure comprises an air inlet arranged on the first panel, and a projection of the air inlet on a plane where the first panel is located covers a projection of the air inlet channel on the plane where the first panel is located.

[0012] In some possible embodiments, the air inlet structure further comprises an air inlet panel connected to a side of the first panel away from the second machine shell, the air inlet panel is provided with a plurality of first air inlets, and the first air inlets are in communication with the air inlet.

[0013] A projection of the air inlet panel on the plane where the first panel is located covers a projection of the air inlet on the plane where the first panel is located, and a middle part of the air inlet panel along a main optical axis direction of the optical module has a gap with the plane where the first panel is located.

[0014] In some possible embodiments, the air inlet panel comprises a first connecting plate and a second connecting plate arranged along the main optical axis direction of the optical module.

[0015] The side of the first connecting plate away from the first panel extends towards the second connecting plate, the side of the second connecting plate away from the first panel extends towards the first connecting plate, and the first connecting plate and the second connecting plate are connected to each other.

[0016] In the application, the surface of the first connecting plate provided with the first air inlet is a plane, and the surface of the second connecting plate provided with the first air inlet is an arc surface curved towards the first panel.

[0017] In some possible embodiments, the air inlet panel is provided with a plurality of first air inlet holes arranged along a long side direction of the display panel, each of the first air inlet holes comprises a plurality of first air inlet holes arranged along a long side direction of the display panel.

[0018] In some possible embodiments, the air inlet panel is provided with a plurality of first air inlet holes arranged along a long side direction of the display panel, each of the first air inlet holes comprises a plurality of first air inlet holes arranged along a long side direction of the display panel.

[0019] In some possible embodiments, the air inlet structure further comprises two air inlet side plates arranged along a short side direction of the display panel, the air inlet side plates are connected to the first panel and the air inlet panel, and the air inlet side plates are provided with a plurality of second air inlet holes in communication with the air inlet.

[0020] In some possible embodiments, a surface of the air inlet side plate provided with the second air inlet hole is an arc surface curved towards the first panel; or

[0021] The air inlet side plate is arranged perpendicularly to the first panel.

[0022] In some possible embodiments, along the long side direction of the display panel, opposite sides of the air inlet panel are respectively matched with the first panel to form second air inlet holes in communication with the air inlet.

[0023] In some possible embodiments, the air inlet structure has an open area ratio of 10% to 45%.

[0024] In some possible embodiments, a first dustproof screen connected to the first cabinet is further included, and the first dustproof screen covers the air inlet structure.

[0025] In some possible embodiments, the first dustproof screen comprises a plurality of dustproof holes for filtering dust with a particle size greater than 90 microns, and the first dustproof screen has an open area ratio of 30% to 40%.

[0026] In some possible embodiments, a second dustproof screen is further included, and the second dustproof screen covers an air outlet side of the fan.

[0027] In some possible embodiments, the heat dissipation module further comprises a heat dissipation fin arranged outside the optical cabinet, and the heat dissipation fin is arranged opposite to the fan.

[0028] In some possible embodiments, the optical module further comprises a light source LED arranged close to an end of the optical cabinet, and the heat dissipation module further comprises a heat-conducting base and a heat pipe arranged outside the optical cabinet.

[0029] The heat-conducting base is in heat-conducting connection with the light source LED;

[0030] The heat pipe is L-shaped, one end of the heat pipe is fixedly connected with the heat-conducting base, and the other end of the heat pipe is fixedly connected with the heat dissipation fin.

[0031] In some possible embodiments, the fan is an axial fan, and the spacing between the air outlet position of the fan and the heat dissipation fin is 4mm-6mm.

[0032] In some possible embodiments, the optical module further comprises a light source close to one end of the light machine shell, and the heat dissipation module further comprises an aluminum extrusion heat sink arranged outside the light machine shell.

[0033] The aluminum extrusion heat sink is L-shaped, one end of the aluminum extrusion heat sink is fixedly connected to one side of the light machine shell where the light source is arranged, the other end of the aluminum extrusion heat sink is arranged opposite to the fan, and a plurality of heat dissipation holes are arranged on the part of the aluminum extrusion heat sink opposite to the fan.

[0034] In some possible embodiments, the plurality of heat dissipation holes are distributed at intervals along the short side direction of the display panel, and the heat dissipation holes are strip-shaped structures extending along the main optical axis direction of the optical module.

[0035] In some possible embodiments, the plurality of heat dissipation holes are arrayed along the main optical axis direction of the optical module and the long side direction of the display panel, and the cross-sectional shape of the heat dissipation holes perpendicular to the short side direction of the display panel is square.

[0036] In some possible embodiments, along the main optical axis direction of the optical module, the air outlet is close to one end of the first lens and has a gap between the first lens.

[0037] In some possible embodiments, the gap is 3.75mm-4mm.

[0038] In some possible embodiments, the second shell is provided with a heat dissipation plate on the side away from the first shell, the heat dissipation plate is arranged around the air outlet, and the side of the heat dissipation plate away from the air outlet is provided with a communication port in communication with the outside of the light machine shell, and the fan is arranged in the space surrounded by the heat dissipation plate.

[0039] In some possible embodiments, the size of the communication port is greater than the size of the air outlet.

[0040] The heat dissipation plate comprises a transition section and a heat dissipation section arranged along the arrangement direction of the air outlet and the communication opening, and the size of the transition section along the main optical axis direction of the optical module gradually increases in the direction from the air outlet to the communication opening.

[0041] The fan is arranged on the heat dissipation section.

[0042] In some possible embodiments, a panel rubber frame is further included, a mounting groove is arranged in the middle of the panel rubber frame, the panel rubber frame is fixed to the inner wall of the optical machine shell, and the display panel is embedded in the mounting groove.

[0043] In the short edge direction of the display panel, the panel rubber frame is provided with a flow guide groove on both sides of the mounting groove, and the flow guide groove is in communication with the mounting groove.

[0044] In some possible embodiments, a first heat insulation glass is arranged between the first lens and the display panel in the main optical axis direction of the optical module, and a second heat insulation glass is arranged between the display panel and the second lens.

[0045] In some possible embodiments, the air gap distance between the first lens and the first heat insulation glass is 0.95 mm to 1.15 mm.

[0046] The air gap distance between the first heat insulation glass and the display panel is 1.7 mm to 1.9 mm.

[0047] The air gap distance between the display panel and the second heat insulation glass is 1.43 mm to 1.63 mm.

[0048] The air gap distance between the second heat insulation glass and the second lens is 2.25 mm to 2.45 mm. BRIEF DESCRIPTION OF DRAWINGS

[0049] Figure 1 FIG. 1 is a schematic diagram of an overall structure of a straight cylinder type projection optical machine in an embodiment of the present application;

[0050] Figure 2 FIG. 2 is a front view of the straight cylinder type projection optical machine in the embodiment of the present application;

[0051] Figure 3 FIG. 3 is a schematic diagram of an exploded structure of the straight cylinder type projection optical machine in the embodiment of the present application;

[0052] Figure 4 FIG. 4 is a schematic diagram of a cross-sectional structure perpendicular to the Y direction in the embodiment of the present application;

[0053] Figure 5 FIG. 5 is a schematic diagram of a structure of a first shell in the embodiment of the present application;

[0054] Figure 6 A structure diagram of an air inlet structure in an embodiment of the present application;

[0055] Figure 7 A structure diagram of an air inlet structure in an embodiment of the present application;

[0056] Figure 8 A structure diagram of an air inlet structure in an embodiment of the present application; Figure 6 A structure diagram of an air inlet structure in an embodiment of the present application;

[0057] Figure 9 A structure diagram of an air inlet structure in an embodiment of the present application; Figure 6 A structure diagram of an air inlet structure in an embodiment of the present application;

[0058] Figure 10 A structure diagram of a first dustproof net in an embodiment of the present application;

[0059] Figure 11 A structure diagram of an air inlet structure in an embodiment of the present application;

[0060] Figure 12 A structure diagram of an air inlet structure in an embodiment of the present application; Figure 11 A structure diagram of an air inlet structure in an embodiment of the present application;

[0061] Figure 13 A structure diagram of an air inlet structure in an embodiment of the present application;

[0062] Figure 14 A structure diagram of an air inlet structure in an embodiment of the present application; Figure 13 A structure diagram of an air inlet structure in an embodiment of the present application;

[0063] Figure 15 A structure diagram of an air inlet structure in an embodiment of the present application;

[0064] Figure 16 A structure diagram of an air inlet structure in an embodiment of the present application; Figure 15 A structure diagram of an air inlet structure in an embodiment of the present application;

[0065] Figure 17 A structure diagram of an air inlet structure in an embodiment of the present application;

[0066] Figure 18 A structure diagram of an air inlet structure in an embodiment of the present application; Figure 17 A structure diagram of an air inlet structure in an embodiment of the present application;

[0067] Figure 19 A structure diagram of a first dustproof net in an embodiment of the present application;

[0068] Figure 20Fig. 1 is a schematic diagram of a part of the structure of a straight-tube type projection optical engine in an embodiment of the present application;

[0069] Figure 21 Fig. 2 is a schematic diagram of the internal structure of the straight-tube type projection optical engine in an embodiment of the present application, perpendicular to the Y direction;

[0070] Figure 22 Fig. 3 is a schematic diagram of the internal structure of the straight-tube type projection optical engine in an embodiment of the present application, perpendicular to the X direction;

[0071] Figure 23 Fig. 4 is a schematic diagram of a structure of a panel adhesive frame in an embodiment of the present application;

[0072] Figure 24 Fig. 5 is a schematic diagram of a structure of a display panel fixed to a panel adhesive frame in an embodiment of the present application;

[0073] Figure 25 Fig. 6 is a schematic diagram of a structure of an aluminum extrusion heat sink in an embodiment of the present application;

[0074] Figure 26 Fig. 7 is a schematic diagram of another structure of an aluminum extrusion heat sink in an embodiment of the present application;

[0075] Figure 27 Fig. 8 is a schematic diagram of a structure of a fan and heat sink fins in an embodiment of the present application.

[0076] Fig. 1 is a schematic diagram of a part of the structure of a straight-tube type projection optical engine in an embodiment of the present application;

[0077] 100 - light machine shell; 101 - air outlet; 102 - air inlet channel; 103, 103a, 103b, 103c, 103d, 103e, 103f, 103g, 103h, 103i, 103j - clamping groove; 110 - first machine shell; 111 - first panel; 112 - first side plate; 120 - second machine shell; 121 - second panel; 122 - second side plate; 200 - optical module; 201 - third lens; 202 - fourth lens; 203 - first lens; 204 - first heat insulation glass; 205 - display panel; 206 - second heat insulation glass; 207 - second lens; 208 - fifth lens; 209 - sixth lens; 210 - light source LED; 300 - heat dissipation module; 310 - fan; 320 - heat dissipation fin; 330 - heat pipe; 340 - heat conduction base; 350 - aluminum extrusion heat sink; 351 - first heat dissipation part; 352 - second heat dissipation part; 353 - heat dissipation hole; 400 - air inlet structure; 410 - air inlet; 420 - air inlet panel; 421 - first connecting plate; 422 - second connecting plate; 430 - first air inlet hole; 440 - air inlet side plate; 450 - second air inlet hole; 500 - first dustproof net; 510 - dustproof hole; 520 - back adhesive; 600 - second dustproof net; 700 - panel adhesive frame; 710 - mounting groove; 720 - flow guide groove; 800 - heat dissipation plate; 801 - heat dissipation channel; 802 - communication port; 810 - transition section; 820 - heat dissipation section. DETAILED DESCRIPTION

[0078] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0079] Reference Figures 1 to 3 The straight-cylinder type projection light machine in the embodiments of the present application can include a light machine shell 100, an optical module 200, and a heat dissipation module 300. The optical module 200 is arranged inside the light machine shell 100, and the heat dissipation module 300 is used for heat dissipation of the optical module 200.

[0080] The optical machine shell 100 can include a first machine shell 110 and a second machine shell 120, the first machine shell 110 and the second machine shell 120 are connected to each other to form a containing space, and the optical module 200 is arranged in the containing space. The optical module 200 can include a third lens 201, a fourth lens 202, a first lens 203, a display panel 205, a second lens 207, a fifth lens 208, a sixth lens 209 and a light source LED 210 arranged in sequence along the main optical axis direction. In addition, the first lens 203 and the display panel 205 are provided with a first heat insulation glass 204, and the display panel 205 and the second lens 207 are provided with a second heat insulation glass 206.

[0081] It is worth noting that in the embodiment, the main optical axis direction of the optical module 200 is perpendicular to the light emitting surface of the light source LED 210, the arrangement direction of the first machine shell 110 and the second machine shell 120 is consistent with the short side direction of the display panel 205, and the long side direction of the display panel 205 is perpendicular to the short side direction of the display panel 205 and perpendicular to the main optical axis direction of the optical module 200. For the convenience of description, in the following embodiments, the main optical axis direction of the optical module 200 of the display panel 205 is defined as the X direction, the long side direction of the display panel 205 is defined as the Y direction, and the short side direction of the display panel 205 is defined as the Z direction.

[0082] Referring to Figure 3 and Figure 4 , along the X direction, the first lens 203, the first heat insulation glass 204, the display panel 205, the second heat insulation glass 206 and the second lens 207 are arranged in the middle part of the optical machine shell 100. The third lens 201 and the fourth lens 202 are arranged near one end of the optical machine shell 100, and the fifth lens 208, the sixth lens 209 and the light source LED 210 are arranged near the other end of the optical machine shell 100. Each of the above optical devices can be fixed relative to the inner wall of the optical machine shell 100 to ensure that each optical device can remain stable during use of the straight tube type projection light machine.

[0083] As Figure 2 and Figure 4 described, the first machine shell 110 is provided with an air inlet structure 400 opposite to the region where the first lens 203 to the second lens 207 are located, the heat dissipation module 300 includes a fan 310 arranged on the second machine shell 120, and the second machine shell 120 is provided with an air outlet 101 opposite to the region where the first lens 203 to the second lens 207 are located. The fan 310 can be arranged at the air outlet 101, or the fan 310 can be arranged near the air outlet 101, so as to discharge the gas in the optical machine shell 100 out of the optical machine shell 100. Wherein, the air inlet structure 400 and the air outlet 101 are arranged along the Z direction.

[0084] That is, the gas outside the light engine housing 100 can enter the inside of the light engine housing 100 through the air inlet structure 400, heat exchange the optical devices while flowing through the optical devices, and the gas heated after absorbing heat can flow out of the air outlet 101 under the action of the fan 310, thereby completing the heat dissipation of the optical devices.

[0085] It can be understood that, in the embodiment, the inside of the light engine housing 100 forms a flow channel for the gas flow between the air inlet structure 400 and the air outlet 101, and the gas can flow into the flow channel from the air inlet structure 400 and then flow to the air outlet 101 from the flow channel. Compared with the existing closed straight-tube projection light engine, the straight-tube projection light engine in the embodiment is designed as a semi-closed structure, which can improve the heat dissipation efficiency and thus prolong the service life of the straight-tube projection light engine.

[0086] As shown in Figure 2 , the first housing 110 can include a first panel 111 and a first side plate 112, the first side plate 112 is connected to the first panel 111, and the first side plate 112 is arranged around the circumference of the first panel 111. The second housing 120 can include a second panel 121 and a second side plate 122, the second side plate 122 is connected to the second panel 121, and the second side plate 122 is arranged around the circumference of the second panel 121. When the first housing 110 and the second housing 120 are connected, the first side plate 112 and the second side plate 122 are connected to each other, and the first panel 111 and the second panel 121 are arranged opposite to each other. At this time, the air inlet structure 400 is arranged on the first panel 111, and the air outlet 101 is arranged on the second panel 121.

[0087] In some embodiments, referring to Figure 4 and Figure 5 , the air inlet structure 400 can include an air inlet 410 arranged on the first panel 111, and the air inlet channel 102 is formed between the first lens 203 and the second lens 207. The orthographic projection of the air inlet 410 on the plane where the first panel 111 is located covers the orthographic projection of the air inlet channel 102 on the plane where the first panel 111 is located. In addition, the two ends of the air inlet 410 along the X direction do not exceed the end faces of the first lens 203 and the second lens 207, respectively, so that the gas outside the light engine housing 100 can only flow along the extension direction of the air inlet channel 102 when flowing into the light engine housing 100 from the air inlet 410.

[0088] Referring to Figures 4 to 6The air inlet structure 400 can further include an air inlet panel 420 arranged on the side of the first panel 111 away from the second casing 120. The air inlet panel 420 is connected to the first panel 111 on both sides in the X direction, and covers the air inlet 410. The air inlet panel 420 is provided with a plurality of first air inlets 430, which are in communication with the air inlet 410, so that the gas outside the optical engine housing 100 can flow to the air inlet 410 through the first air inlets 430, and then flow into the interior of the optical engine housing 100 through the air inlet 410.

[0089] It can be understood that in the embodiment, by arranging the air inlet panel 420 on the first panel 111 and arranging the first air inlets 430 on the air inlet panel 420, the air inlet panel 420 can not only realize the flow of gas, but also can block light, thereby improving the light leakage prevention performance of the optical engine housing 100.

[0090] In the embodiment, the middle part of the air inlet panel 420 in the X direction is raised relative to the first panel 111, so that the air inlet panel 420 has a certain gap with the plane where the first panel 111 is located. In this way, the surface area of the air inlet panel 420 can be increased, so that more first air inlets 430 can be arranged. That is, when the air inlet panel 420 is arranged, the air inlet structure 400 is a three-dimensional structure as a whole. At this time, the air inlet panel 420 can be connected by at least two connecting plates arranged in the X direction, or the air inlet panel 420 can be formed by at least one arc-shaped panel. Exemplarily, the air inlet structure 400 as a whole can be a cuboid, a cylindrical body divided into two along an axis, a triangular prism, etc. It should be noted that when the air inlet structure is a cylindrical body or a triangular prism, the axis of the cylindrical body or the axis of the triangular prism extends in the Y direction.

[0091] Of course, the air inlet structure 400 as a whole can also be an irregular three-dimensional structure. For example, the air inlet panel 420 can be composed of at least one arc-shaped panel and at least one flat panel arranged in the X direction. Alternatively, the air inlet panel 420 can also be composed of a plurality of flat panels arranged in the X direction, and at least two pairs of adjacent flat panels in the plurality of flat panels have different arrangement directions.

[0092] Based on this, as an optional embodiment, as shown in FIG. 6, the air inlet panel 420 can be arranged on the side of the first panel 111 away from the second casing 120. The air inlet panel 420 is connected to the first panel 111 on both sides in the X direction, and covers the air inlet 410. The air inlet panel 420 is provided with a plurality of first air inlets 430, which are in communication with the air inlet 410, so that the gas outside the optical engine housing 100 can flow to the air inlet 410 through the first air inlets 430, and then flow into the interior of the optical engine housing 100 through the air inlet 410. Figures 6 to 8, the outer shape of the air inlet panel 420 is similar to a dustpan shape, at this time, the air inlet panel 420 can include a first connecting plate 421 and a second connecting plate 422, the first connecting plate 421 and the second connecting plate 422 are arranged along the X direction. Wherein, one end of the first connecting plate 421 is connected to the first panel 111, the other end of the first connecting plate 421 extends towards the second connecting plate 422, one end of the second connecting plate 422 is connected to the first panel 111, the other end of the second connecting plate 422 extends towards the first connecting plate 421. The surface of the first connecting plate 421 provided with the first air inlet hole 430 can be regarded as the large surface of the first connecting plate 421, and the surface of the second connecting plate 422 provided with the first air inlet hole 430 can be regarded as the large surface of the second connecting plate 421. The large surface of the first connecting plate 421 is a plane, and the large surface of the second connecting plate 422 is an arc surface, and the arc surface is curved towards the first panel 111, so that the orthographic projection of the air inlet panel 420 on the first plane is a half-ear shape, and the first plane is a plane parallel to the X direction.

[0093] It is worth mentioning that the shape design of the air inlet panel 420 in the embodiment can be adapted to the use scene of the straight cylinder type projection light machine. When the air inlet panel 420 is designed as a dustpan shape, the gas outside the light machine shell 100 can be close to the shape of the air inlet panel 420 when flowing to the first air inlet hole 430, so as to reduce the flow resistance of the gas, so that the gas is more easily flowed into the inside of the light machine shell 100, thereby further improving the heat dissipation efficiency.

[0094] Further, as shown in Figure 6 or Figure 8 , the first air inlet hole 430 provided on the air inlet panel 420 can include a plurality of rows of holes arranged along the X direction, each row of holes includes a plurality of first air inlet holes 430 arranged along the Y direction, thereby forming an array of first air inlet holes 430, so that more gas can flow into the light machine shell 100 through the first air inlet hole 430.

[0095] The shape of the first air inlet hole 430 can be circular, square, etc., the plurality of first air inlet holes 430 can be composed of a plurality of circular holes, or the plurality of first air inlet holes 430 can be composed of a plurality of square holes, or the plurality of first air inlet holes 430 can be formed by combining a plurality of circular holes and a plurality of square holes, and the embodiment does not limit this.

[0096] Continuing to refer to Figure 6 or Figure 8The air inlet structure 400 can further include two air inlet side plates 440 arranged along the Y direction, connected to opposite sides of the air inlet panel 420 respectively, and connected with the first panel 111 respectively. The distance between the two air inlet side plates 440 is greater than the size of the air inlet hole along the Y direction and less than the size of the first panel 111 along the Y direction. Each air inlet side plate 440 is provided with a plurality of second air inlet holes 450 in communication with the air inlet hole 410, and the plurality of second air inlet holes 450 can include a plurality of rows of holes arranged along the Z direction, and each row of holes includes at least one second air inlet hole 450.

[0097] In this embodiment, the end of the air inlet side plate 440 away from the first panel 111 extends towards the middle of the first panel 111 in the Y direction, and the surface of the air inlet side plate 440 provided with the second air inlet hole 450 is an arc surface curved towards the first panel 111, thereby reducing air resistance.

[0098] It should be noted that the straight cylinder type projection light machine in this embodiment can be applied to a 0.85 inch micro projection light machine product, and thus the size of the first housing 110 in the X, Y and Z directions can be designed as 52.29 mm, 43.73 mm and 18.68 mm respectively. On this basis, the size of the air inlet hole 410 in the X and Y directions can be designed as 24 mm and 10.63 mm respectively, and the size of the air inlet channel 102 in the X and Z directions can be designed as 24 mm and 10.63 mm respectively. The size of the air inlet panel 420 in the X, Y and Z directions can be designed as 14.84 mm, 27.02 mm and 5.18 mm respectively.

[0099] At the same time, as mentioned above, when the air inlet structure 400 is set in this embodiment, the air inlet amount can be ensured, and the effective light leakage prevention effect can also be achieved. In specific setting, the ratio of the total area of the first air inlet hole 430 and the second air inlet hole 450 to the total area of the air inlet panel 420 and the air inlet side plate 440 can be designed as 10% to 20%, that is, the opening rate of the air inlet structure 400 is 10% to 20%.

[0100] It should be noted that the total area of the air inlet panel 420 and the air inlet side plate 440 refers to the area of the air inlet panel 420 and the air inlet side plate 440 without the air inlet hole. In addition, for the convenience of understanding, in the following embodiments, when referring to the area of the air inlet panel 420 and / or the air inlet side plate 440, it refers to the area without the air inlet hole.

[0101] At this time, as an optional embodiment, continuing to refer to Figure 8For example, the first air inlet hole 430 is a circular hole, and the diameter of the first air inlet hole 430 can be designed as 1 mm. In the Y direction, the spacing between two adjacent first air inlet holes 430 can be designed as 1.8 mm. In the X direction, the spacing between two adjacent first air inlet holes 430 can be designed as 1.8 mm. In addition, along the X direction, 8 rows of first air inlet holes 430 can be arranged, and each row can be distributed with 11-13 first air inlet holes 430.

[0102] For example, the second air inlet hole 450 is also a circular hole, and the diameter of the second air inlet hole 450 can be designed as 1 mm. In the X direction, the spacing between two adjacent second air inlet holes 450 can be designed as 1.5 mm. In the Z direction, the spacing between two adjacent second air inlet holes 450 can be designed as 1.2 mm. In addition, each air inlet side plate 440 can be provided with 11 second air inlet holes 450.

[0103] In the above scheme, the opening rate of the air inlet structure 400 is 14.7%, which can meet the air inlet amount required for heat dissipation while ensuring good light leakage prevention effect.

[0104] In the embodiment, with reference to Figure 9 , the side of the first panel 111 away from the second panel 121 is also provided with a first dust screen 500, and the first dust screen 500 covers the air inlet structure 400 to play a dust prevention role on the air inlet structure 400, so as to avoid the dust outside the optical machine shell 100 from entering the inside of the optical machine shell 100 through the air inlet 410, and affect the normal operation of the optical device.

[0105] The shape of the first dust screen 500 can be similar to that of the air inlet structure 400, so that the first dust screen 500 can be fitted with the shape of the air inlet structure 400. For example, with reference to Figure 9 and Figure 10 , when the orthographic projection shape of the air inlet panel 420 on the first plane is a semicircle, the orthographic projection shape of the first dust screen 500 on the first plane is also a semicircle. When the orthographic projection shape of the air inlet panel 420 on the first plane is a dustpan shape, the orthographic projection shape of the first dust screen 500 on the first plane is also a dustpan shape. When the first dust screen 500 covers the air inlet structure 400, a certain gap is maintained between the first dust screen 500 and the air inlet structure 400, so as to facilitate the circulation of gas.

[0106] For example, in the above scheme, the overall shape of the air inlet panel 420 and the air inlet side plate 440 is a dustpan shape, and the dimensions of the first dust screen 500 in the X, Y and Z directions can be designed as 15 mm, 31.9 mm and 7.5 mm respectively. At this time, the size of the first dust screen 500 in the Y direction can be the same as that of the first panel 111 in the Y direction, so as to realize the effect of completely covering the air inlet structure 400.

[0107] When the first dust screen 500 is fixed to the first casing 110, the first dust screen 500 can be fixed to the first casing 110 by means of adhesion. Specifically, the end of the first dust screen 500 is provided with back glue 520 along the X direction and the Y direction, respectively, wherein the size of the back glue 520 along the X direction and the Z direction can be 14.8 mm and 2 mm, respectively, and the size of the back glue 520 along the Y direction and the X direction can be 31.6 mm and 1 mm, respectively. When the first dust screen 500 is adhered to the first casing 110 by the back glue 520, the back glue 520 along the Y direction is adhered to the first panel 111, and the back glue 520 along the X direction is adhered to the first side plate 112.

[0108] Further, the first dust screen 500 is also provided with a plurality of dust holes 510, so that the gas can flow to the air inlet structure 400 through the dust holes 510. Here, the ratio of the total area of the dust holes 510 to the total area of the first dust screen 500 is defined as the opening rate of the first dust screen 500. Simulation tests are carried out with the opening rate of the first dust screen 500 being 20% and 30%, respectively. When the opening rate is 20%, the temperature of the display panel 205 is 70.8℃, and under normal circumstances, the temperature of the display panel 205 needs to be lower than 70℃, so the opening rate of the first dust screen 500 is not in line with the temperature resistance requirement of the display panel 205 when it is 20%. When the opening rate of the first dust screen 500 is 30%, the temperature of the display panel 205 is 68.1℃, which meets the temperature resistance requirement of the display panel 205.

[0109] In addition, due to the dust prevention requirement of the first dust screen 500, the dust holes 510 need to filter dust with a particle size greater than 90 microns, and according to different size designs of the dust holes 510, 40% is the maximum opening rate of the first dust screen 500 that can completely filter dust with a particle size greater than 90 microns. Therefore, the opening rate of the first dust screen 500 in the embodiment can be 30% to 40%.

[0110] In summary, when designing the air inlet structure 400 in the straight cylinder type projection light machine in the embodiment, the air inlet structure 400 can be provided with an opening rate of 10% to 20%, and the first dust screen 500 with an opening rate of 30% to 40% is matched, so that not only the problems of heat dissipation and light leakage can be effectively solved, but also the dust prevention requirement can be met.

[0111] In addition, in actual application, the material of the first dust screen 500 can be a steel mesh or a nylon mesh, for example, to ensure the strength of the first dust screen 500 and prevent the first dust screen 500 from being easily deformed.

[0112] In some embodiments, reference is made to Figure 5 and Figure 11The air inlet structure 400 in the embodiment can include an air inlet 410 arranged on the first panel 111 and an air inlet panel 420 connected to the first panel 111, and the air inlet panel 420 is provided with a plurality of first air inlets 430.

[0113] It is worth noting that the air inlet panel 420 in the above embodiment has the same shape as the air inlet panel 420 shown in the first aspect of the present application, that is, the orthographic projection of the air inlet panel 420 on the first plane is in the shape of a half ear. Since there is a certain gap between the top end of the air inlet panel 420 and the first panel 111, the opposite sides of the air inlet panel 420 along the Y direction can form second air inlets 450 with the first panel 111, respectively, and the orthographic projection of the second air inlets 450 on the first plane is also in the shape of a half ear. Figure 6

[0114] Alternatively, it can be understood from another angle that the air inlet structure 400 in the embodiment includes the air inlet panel 420 and two air inlet side panels 440, the two air inlet side panels 440 are respectively connected to the opposite sides of the air inlet panel 420 along the Y direction, and the air inlet side panels 440 are arranged perpendicular to the first panel 111. The air inlet side panels 440 are provided with the second air inlets 450, and the ratio of the area of the second air inlets 450 to the area of the air inlet panel 420 is 100%. In this way, the opening rate of the air inlet structure 400 in the embodiment can be understood as the ratio of the total area of the first air inlets 430 and the second air inlets 450 to the total area of the air inlet panel 420 and the air inlet side panels 440. Of course, the air inlet side panels 440 in the air inlet structure 400 in the embodiment cannot be seen in the physical structure, and the air inlet side panels 440 here are only used to assist in describing the setting position of the second air inlets 450 and the opening rate of the air inlet structure 400.

[0115] In the embodiment, a straight cylinder type projection light machine is applied to a 0.85 inch micro projection light machine product, the dimensions of the first shell 110 in the X, Y and Z directions are 52.29 mm, 43.73 mm and 18.68 mm respectively, and in addition, the dimension of the first panel 111 in the Y direction is 31.6 mm. On this basis, the dimensions of the air inlet panel 420 in the embodiment in the X, Y and Z directions can be designed as 14.84 mm, 31.6 mm and 5.18 mm respectively, that is, the two sides of the air inlet panel 420 along the Y direction are flush with the two sides of the first panel 111 along the Y direction. At this time, the total area of the air inlet structure 400 is 708.4 mm 2 .

[0116] ​For example, the first air inlet hole 430 is a circular hole, and the diameter of the first air inlet hole 430 is 1 mm. In the X direction, the first air inlet hole 430 can be provided with a total of 8 rows, each row is provided with 17 first air inlet holes 430 arranged along the Y direction, and the spacing between the adjacent two first air inlet holes 430 can be designed to be 1.8 mm. The total area of the first air inlet hole 430 is 106.76 mm 2 , and the total area of the second air inlet hole 450 on both sides is 62 mm 2 At this time, the opening rate of the air inlet structure 400 is 23.8%.

[0117] Further, in the present embodiment, with reference to Figure 12 , the surface of the air inlet structure 400 can also be covered with a first dust screen 500, and the first dust screen 500 can have the same structure as the first dust screen 500 shown in Figure 10 , since the size of the first dust screen 500 along the Y direction is the same as the size of the first panel 111, the air inlet structure 400 can also be well covered in the present embodiment.

[0118] On this basis, the heat dissipation simulation test is carried out on the straight cylinder type projection light machine provided with the air inlet structure 400 in the present embodiment, and the air inlet structure 400 with an opening rate of 23.8% is matched with the first dust screen 500 with an opening rate of 30%-40%, and the maximum temperature of the display panel 205 is lower than 70℃, which meets the temperature resistance requirement of the display panel 205. Therefore, the straight cylinder type projection light machine in the present embodiment, by setting the air inlet structure 400 with an opening rate of 23.8% and the first dust screen 500 with an opening rate of 30%-40%, not only can effectively dissipate heat and prevent light leakage, but also can meet the dust prevention requirement.

[0119] In some embodiments, with reference to Figure 5 and Figure 13 , the air inlet structure 400 in the present embodiment can include an air inlet 410 provided on the first panel 111, an air inlet panel 420 connected to the first panel 111, and two air inlet side panels 440 arranged along the Y direction, the air inlet side panel 440 is connected to the first panel 111 and connected to the air inlet panel 420. The air inlet panel 420 is provided with a plurality of first air inlet holes 430, and the air inlet side panel 440 is provided with a plurality of second air inlet holes 450.

[0120] It is worth noting that the shape of the air inlet panel 420 in the present embodiment is the same as the air inlet panel 420 shown in Figure 6 , compared with the air inlet structure 400 in Figure 6 , the air inlet side panel 440 in the present embodiment is perpendicular to the first panel 111.

[0121] In the embodiment, the straight cylinder type projection light engine is applied to a 0.85 inch micro projection light engine product, the size of the first shell 110 in the X, Y and Z directions is 52.29 mm, 43.73 mm and 18.68 mm respectively, and the size of the first panel 111 in the Y direction is 31.6 mm. On this basis, the size of the air inlet panel 420 in the X, Y and Z directions in the embodiment can be designed as 14.84 mm, 27 mm and 5.18 mm respectively, and the total area of the air inlet panel 420 and the air inlet side plate 440 is 618.8 mm 2 .

[0122] For example, the first air inlet hole 430 and the second air inlet hole 450 are both circular holes, and the diameter of the first air inlet hole 430 and the second air inlet hole 450 is 1 mm. In the X direction, the first air inlet hole 430 can be provided with 8 rows in total, each row is provided with 13 first air inlet holes 430 arranged along the Y direction, and the spacing between adjacent two first air inlet holes 430 can be designed as 1.8 mm, and the total area of the first air inlet hole 430 is 106.76 mm 2 . Each side of the air inlet side plate 440 is provided with 11 second air inlet holes 450, the spacing between adjacent two second air inlet holes 450 in the X direction is 1.5 mm, and the spacing between adjacent two second air inlet holes 450 in the Z direction is 1.2 mm, and the total area of the second air inlet hole 450 is 17.27 mm 2 . At this time, the opening rate of the air inlet structure 400 is 15.9%.

[0123] Further, in the embodiment, referring to Figure 14 , the surface of the air inlet structure 400 can also be covered with a first dust screen 500, and the first dust screen 500 can have the same structure as the first dust screen 500 shown in Figure 10 . Since the size of the first dust screen 500 in the X, Y and Z directions is larger than the size of the air inlet structure 400, the air inlet structure 400 can be well covered, thereby playing a dustproof role.

[0124] On this basis, the straight cylinder type projection light engine provided with the air inlet structure 400 in the embodiment is subjected to a heat dissipation simulation test, the air inlet structure 400 with an opening rate of 15.9% is matched with the first dust screen 500 with an opening rate of 30% to 40%, and the maximum temperature of the display panel 205 is lower than 70℃, which meets the temperature resistance requirement of the display panel 205. Therefore, the straight cylinder type projection light engine in the embodiment, by setting the air inlet structure 400 with an opening rate of 15.9% and the first dust screen 500 with an opening rate of 30% to 40%, can not only effectively dissipate heat and prevent light leakage, but also meet the dustproof requirement.

[0125] In some embodiments, referring to Figure 5 and Figure 15The air inlet structure 400 in the embodiment can include an air inlet 410 arranged on the first panel 111 and an air inlet panel 420 connected to the first panel 111, and the air inlet panel 420 is provided with a plurality of first air inlets 430.

[0126] It is worth noting that the overall shape of the air inlet structure 400 described above is the same as the overall shape of the air inlet structure 400 shown in Figure 11 , that is, the second air inlet 450 is formed between the air inlet panel 420 and the first panel 111, and the orthographic projection of the second air inlet 450 on the first plane is a half-ear shape.

[0127] The plurality of first air inlets 430 can be arranged at intervals along the Y direction, and each first air inlet 430 is a strip-shaped hole. Specifically, the extension direction of the first air inlet 430 is the same as the extension direction of the air inlet panel 420. Here, it can be understood that the shape of the orthographic projection of the first air inlet 430 on the first plane is the same as the shape of the orthographic projection of the air inlet panel 420 on the first plane.

[0128] In this embodiment, taking a straight cylinder type projection light machine applied to a 0.85 inch micro projection light machine product as an example, the dimensions of the first shell 110 in the X, Y, and Z directions are 52.29 mm, 43.73 mm, and 18.68 mm, respectively, and the dimension of the first panel 111 in the Y direction is 31.6 mm. On this basis, the dimensions of the air inlet panel 420 in the X, Y, and Z directions in this embodiment can be designed as 14.84 mm, 31.6 mm, and 5.18 mm, respectively, and the two sides of the air inlet panel 420 along the Y direction are flush with the two sides of the first panel 111 along the Y direction. At this time, the total area of the air inlet structure 400 is 708.4 mm 2 .

[0129] The width of the first air inlet 430 along the Y direction can be designed as 2 mm, and the length along the X direction can be designed as 13.37 mm. The number of the first air inlets 430 can be designed as 7, and the spacing between adjacent two first air inlets 430 can be designed as 2 mm. Then, the total area of the first air inlets 430 is 249.9 mm 2 , and the total area of the second air inlets 450 is 62 mm 2 . At this time, the opening rate of the air inlet structure 400 is 44%.

[0130] Further, in this embodiment, referring to Figure 16 , the surface of the air inlet structure 400 can also be covered with a first dust screen 500, and the first dust screen 500 can have the same structure as the first dust screen 500 shown in Figure 10 the foregoing embodiments. Since the size of the first dust screen 500 along the Y direction is the same as the size of the first panel 111, the first dust screen 500 can also well cover the air inlet structure 400 in this embodiment.

[0131] On this basis, the heat dissipation simulation test is carried out on the straight cylinder type projection light machine provided with the air inlet structure 400 in the embodiment. The air inlet structure 400 with an opening rate of 23.8% is matched with the first dust screen 500 with an opening rate of 30%-40%, and the maximum temperature of the display panel 205 is lower than 70°C, which meets the temperature resistance requirement of the display panel 205. In addition, although the first air inlet hole 430 in the form of a strip is arranged in the embodiment, the opening rate of the air inlet structure 400 is greater than the opening rate when the circular hole is arranged in the foregoing embodiment, but the air inlet panel 420 can still play a role in preventing light leakage to a certain extent. Therefore, the straight cylinder type projection light machine in the embodiment, by arranging the air inlet structure 400 with an opening rate of 44% and the first dust screen 500 with an opening rate of 30%-40%, can not only realize heat dissipation and light leakage prevention, but also meet the dust prevention requirement.

[0132] In some embodiments, with reference to Figure 5 and Figure 17 The air inlet structure 400 in the embodiment can include the air inlet 410 arranged on the first panel 111, the air inlet panel 420 connected to the first panel 111, and two air inlet side plates 440 arranged along the Y direction, the air inlet side plate 440 being connected to the first panel 111 and connected to the air inlet panel 420. The air inlet panel 420 is provided with a plurality of first air inlet holes 430, and the air inlet side plate 440 is provided with a plurality of second air inlet holes 450.

[0133] It is worth noting that the shape of the air inlet panel 420 and the shape of the first air inlet hole 430 in the embodiment are the same as the air inlet panel 420 and the first air inlet hole 430 shown in the foregoing embodiment as Figure 15 , that is, the first air inlet hole 430 is a strip-shaped hole. The air inlet side plate 440 is perpendicular to the first panel 111, and the plurality of second air inlet holes 450 arranged on the air inlet side plate 440 are the same as the form of the second air inlet hole 450 shown in the foregoing embodiment as Figure 13 .

[0134] In the embodiment, taking the application of the straight cylinder type projection light machine in a 0.85-inch micro projection light machine product as an example, the size of the first housing 110 in the X, Y and Z directions is 52.29 mm, 43.73 mm and 18.68 mm respectively, and the size of the first panel 111 in the Y direction is 31.6 mm. On this basis, the size of the air inlet panel 420 in the X, Y and Z directions in the embodiment can be designed as 14.84 mm, 27 mm and 5.18 mm respectively, and the total area of the air inlet panel 420 and the air inlet side plate 440 is 618.8 mm 2 .

[0135] The length of the first air inlet hole 430 along the X direction is 13.37 mm, the number of the first air inlet hole 430 is 7, and the spacing between adjacent two first air inlet holes 430 is 2 mm. Among them, the width of the five first air inlet holes 430 in the middle along the Y direction is 2 mm, and the width of the first air inlet holes 430 on both sides along the Y direction is 0.8 mm, then the total area of the first air inlet hole 430 is 207.1 mm 2 .

[0136] The air inlet side plate 440 on each side is provided with 11 second air inlet holes 450, and the diameter of the second air inlet hole 450 is 1 mm. The spacing between adjacent two second air inlet holes 450 along the X direction is 1.5 mm, and the spacing between adjacent two second air inlet holes 450 along the Z direction is 1.2 mm, then the total area of the second air inlet hole 450 is 17.27 mm 2 At this time, the opening rate of the air inlet structure 400 is 36.3%.

[0137] Further, in the present embodiment, with reference to Figure 18 , the surface of the air inlet structure 400 can also be covered with a first dust screen 500, which can be the same structure as the first dust screen 500 shown in Figure 10 of the foregoing embodiments.

[0138] On this basis, the straight-tube projection light machine provided with the air inlet structure 400 in the present embodiment is subjected to heat dissipation simulation test, and the air inlet structure 400 with an opening rate of 36.3% is matched with the first dust screen 500 with an opening rate of 30%-40%, the maximum temperature of the display panel 205 is lower than 70℃, which meets the temperature resistance requirement of the display panel 205. Therefore, the straight-tube projection light machine in the present embodiment, by setting the air inlet structure 400 with an opening rate of 36.3% and the first dust screen 500 with an opening rate of 30%-40%, not only can effectively dissipate heat and prevent light leakage, but also can meet the dust prevention requirement.

[0139] In some embodiments, with reference to Figure 5 and Figure 19 , the air inlet structure 400 in the present embodiment can include an air inlet 410 arranged on the first panel 111, and the gas outside the light machine shell 100 can directly flow into the inside of the light machine shell 100 through the air inlet 410. The size of the air inlet 410 in the X and Y directions can be designed as 24 mm and 10.63 mm respectively, because the size of the air inlet 410 is larger, more gas can flow into the inside of the light machine shell 100, thereby improving the heat dissipation efficiency of each optical device.

[0140] In the present embodiment, the surface of the air inlet 410 can also be covered with a first dust screen 500, which can be the same structure as the first dust screen 500 shown in Figure 10The first dust screen 500 shown has the same structure.

[0141] On this basis, the first dust screen 500 with a 30% to 40% opening rate is matched to the straight cylinder type projection light machine provided with the air inlet structure 400 in the embodiment to perform a heat dissipation simulation test, and the highest temperature of the display panel 205 is 56.2°C, and the highest temperature of the LED light source is 75.9°C, which well meets the temperature resistance requirements of the display panel 205 and the LED light source. Thus, the straight cylinder type projection light machine in the embodiment can greatly improve the heat dissipation efficiency and meet the dust prevention requirements by directly arranging the air inlet 410 on the first panel 111 and arranging the first dust screen 500 with a 30% to 40% opening rate covering the air inlet 410.

[0142] The foregoing embodiments are all examples of the specific arrangement of the air inlet 410 arranged on the air inlet panel 420 and the air inlet side plate 440. In actual application, the number and arrangement of the first air inlet hole 430 arranged on the air inlet panel 420 and the number and arrangement of the second air inlet hole 450 arranged on the air inlet side plate 440 can also be designed according to actual requirements. In addition to the circular hole and the strip-shaped hole described in the foregoing embodiments, the first air inlet hole 430 can also be a free combination of a circular hole and a strip-shaped hole, or a polygonal hole, etc. At this time, only the overall opening rate of the air inlet structure 400 needs to be controlled between 10% and 45% to meet the heat dissipation requirements of the optical device.

[0143] It is worth noting that when the air inlet panel 420 and the air inlet side plate 440 are respectively provided with a plurality of first air inlet holes 430 and second air inlet holes 450, the size of the air inlet panel 420 along the Y direction should be smaller than the size of the first panel 111 along the Y direction to facilitate the machining between the light machine shell 100 and the air inlet structure 400. At this time, the opening rate of the air inlet structure 400 can be controlled between 10% and 20% to achieve good heat dissipation effect and good light leakage prevention effect.

[0144] In addition, the first dust screen 500 in the foregoing embodiments is only an example of one specification. As can be seen, when the size of the first dust screen 500 along the Y direction is designed to be the same as the size of the first panel 111 along the Y direction, not only good dust prevention effect can be achieved, but also the first dust screen 500 can be adapted to different forms of air inlet structure 400, which is conducive to reducing production cost.

[0145] Further, when the air inlet panel 420 forms the second air inlet hole 450 with the first panel 111 on both sides along the Y direction, the size of the air inlet panel 420 along the Y direction can be the same as the size of the first panel 111 along the Y direction. On this basis, the air inlet panel 420 can be provided with a plurality of first air inlet holes 430 with smaller sizes, or a plurality of first air inlet holes 430 in the shape of a strip, and the size of the first air inlet hole 430 can also be adaptively designed according to the actual opening rate requirement, which is not limited here.

[0146] In some embodiments, with reference to Figure 20 and Figure 21 , the side of the second panel 121 away from the first shell 110 is provided with a heat dissipation plate 800 connected to the second panel 121 around the circumference of the air outlet 101, so that the orthographic projection of the heat dissipation plate 800 on the plane where the second panel 121 is located can cover the air outlet 101. The end of the heat dissipation plate 800 away from the air outlet 101 is provided with a communication port 802, which can be used to communicate the inside and outside of the light machine shell 100, and the position of the heat dissipation plate 800 between the air outlet 101 and the communication port 802 can also form a heat dissipation channel 801. The fan 310 can be arranged in the space surrounded by the heat dissipation plate 800, or the side of the fan 310 away from the first shell 110 can also slightly extend outside the heat dissipation plate 800 from the communication port 802.

[0147] When the fan 310 operates, the gas inside the light machine shell 100 can be pumped out, so that the gas inside the light machine shell 100 flows into the heat dissipation channel 801 from the air outlet 101, and then flows to the outside of the light machine shell 100 through the heat dissipation channel 801, thereby completing the circulation of the gas inside the light machine shell 100.

[0148] In the present embodiment, as shown in the structure shown in the circle in Figure 21 , along the X direction, there is a gap between the air outlet 101 and the first lens 203, and the size of the gap can be 3.75mm-4mm. When the gas flows into the air inlet channel 102 from the air inlet 410, and then flows to the heat dissipation channel 801 from the air inlet channel 102, due to the gap between the air outlet 101 and the first lens 203, a part of the gas can flow from the gap to the side of the first lens 203 away from the LED light source, so as to make a small amount of gas flow through the third lens 201 and the fourth lens 202, thereby preventing the third lens 201 and the fourth lens 202 from fogging.

[0149] Further, with reference to Figure 20 and Figure 21In the Z direction, the heat dissipation plate 800 includes a transition section 810 and a heat dissipation section 820, wherein the transition section 810 is connected with the second panel 121, and the heat dissipation section 820 is connected with a side of the transition section 810 away from the air outlet 101. In the direction of the transition section 810 pointing to the heat dissipation section 820, the size of the transition section 810 in the X direction gradually increases, and the size of the fan 310 in the X direction can be the same as the size of the heat dissipation section 820, so that the fan 310 can be clamped at the part of the heat dissipation plate 800 corresponding to the heat dissipation section 820. It can be understood that by designing the heat dissipation plate 800 as a two-section structure with different sizes, the air resistance of the gas flowing from the air outlet 101 to the heat dissipation channel 801 can be reduced.

[0150] In the process of the gas flowing from the air inlet 410 to the communication port 802, the flow channel of the gas is the air inlet channel 102 + the heat dissipation channel 801. The cross-sectional size of the flow channel at the part where the heat dissipation channel 801 is connected with the air inlet channel 102 changes, which can make a small amount of air flow through the lens, thereby solving the problem of lens fogging. In the heat dissipation channel 801, the cross-sectional size of the flow channel corresponding to the transition section 810 gradually increases, which can facilitate the transition of the gas to the air inlet of the fan 310, so that the fan 310 can draw the gas out of the outside of the light machine shell 100.

[0151] In specific settings, the size of the air inlet channel 102 in the Z direction is substantially the same as the size of the inside of the light machine shell 100 in the Z direction, and the size in the X direction is the same as the distance between the first lens 203 and the second lens 207. At this time, the sizes of the air inlet channel 102 in the X, Y, and Z directions can be 13.13 mm, 23.3 mm, and 10.63 mm, respectively. In addition, the sizes of the transition section 810 in the Y and Z directions can be 23.3 mm and 5.9 mm, respectively, and the sizes of the heat dissipation section 820 in the X, Y, and Z directions can be 21.96 mm, 23.3 mm, and 10 mm, respectively.

[0152] In some embodiments, with reference to Figure 22The inner wall of the optical engine housing 100 can be provided with a clamping groove 103 corresponding to each optical device, so that each optical device can be clamped in the corresponding clamping groove 103 to realize relative fixation with the optical engine housing 100. The center distance d1 between the clamping groove 103a for mounting the third lens 201 and the clamping groove 103b for mounting the fourth lens 202 can be designed as 6.7 mm, the center distance d2 between the clamping groove 103b and the clamping groove 103c for mounting the first lens 203 can be designed as 17.82 mm, the center distance d3 between the clamping groove 103c and the clamping groove 103d for mounting the first heat-insulating glass 204 can be designed as 2.45 mm, the center distance d4 between the clamping groove 103d and the clamping groove 103e for mounting the display panel 205 can be designed as 2.58 mm, the center distance d5 between the clamping groove 103e and the clamping groove 103f for mounting the second heat-insulating glass 206 can be designed as 2.3 mm, the center distance d6 between the clamping groove 103f and the clamping groove 103g for mounting the second lens 207 can be designed as 3.76 mm, the center distance d7 between the clamping groove 103g and the clamping groove 103h for mounting the fifth lens 208 can be designed as 4.98 mm, the center distance d8 between the clamping groove 103h and the clamping groove 103i for mounting the sixth lens 209 can be designed as 7.64 mm, and the center distance d9 between the clamping groove 103i and the clamping groove 103j for mounting the light source LED 210 can be designed as 1.57 mm.

[0153] Each clamping groove 103 can be designed according to the optical architecture. In the X direction, a gap of 0.15 mm can be reserved between the clamping groove 103 and the optical device, and in the Y direction and the Z direction, a gap of 0.1 mm can be respectively reserved between the optical device and the optical engine housing 100, so as to meet the structural assembly and optical imaging effect.

[0154] Referring to Figure 3 , Figure 23 and Figure 24 , the optical engine housing 100 can further be provided with a panel rubber frame 700, and the middle part of the panel rubber frame 700 is provided with a mounting groove 710, so that the display panel 205 can be embedded in the mounting groove 710. When the display panel 205 needs to be fixed in the corresponding clamping groove 103, the four sides of the panel rubber frame 700 can be clamped with the clamping groove 103, so as to avoid the display panel 205 from contacting the clamping groove 103, thereby playing a role in protecting the display panel 205.

[0155] As Figure 23As shown, along the Z direction, the panel frame 700 can be provided with a plurality of flow guide grooves 720 on both sides of the mounting groove 710. The plurality of flow guide grooves 720 on each side can be arranged along the Y direction, and each flow guide groove 720 extends along the Z direction, so that the flow guide groove 720 can be in communication with the mounting groove 710. When the gas flows from the upper and lower surfaces of the display panel 205, a part of the gas can flow along the flow guide groove 720, and the flow guide groove 720 can guide more gas to the surface of the display panel 205, thereby increasing the air volume flowing through the display panel 205, so as to better cool the display panel 205.

[0156] In the embodiment, the panel frame 700 can be provided with flow guide grooves 720 on both sides along the X direction, and the flow guide grooves 720 on both sides are not in communication, so as to ensure the structural strength of the panel frame 700. In this way, more air volume can flow through the upper and lower surfaces of the display panel 205, and the heat dissipation effect can be further improved.

[0157] In some embodiments, the fan 310 can be an axial flow fan, and the noise of the axial flow fan is less than 36 dB, which is beneficial to ensure the use experience of the straight cylinder type projection light machine for the user. The size of the axial flow fan in the X direction and the Y direction can be substantially the same as the size of the heat dissipation section 820, so that the axial flow fan can be clamped with the heat dissipation plate 800, and the relative fixation between the axial flow fan and the heat dissipation plate 800 is realized.

[0158] Again referring to Figure 20 , the air outlet side of the fan 310 can be further provided with a second dust screen 600, and the second dust screen 600 covers the fan 310, so as to prevent external dust from flowing into the fan 310 or flowing into the inside of the light machine housing 100 through the fan 310.

[0159] When the end of the fan 310 protrudes from the heat dissipation plate 800, the second dust screen 600 can be fixed to the surface of the air outlet side of the fan 310. When the fan 310 is located in the heat dissipation plate 800, the second dust screen 600 can be fixed to the heat dissipation plate 800 and covers the communication port 802, so as to realize the dustproof effect.

[0160] In some embodiments, again referring to Figure 21 , the heat dissipation module 300 can further include a heat dissipation fin 320, a heat conduction base 340 and a heat pipe 330 arranged outside the light machine housing 100. The heat conduction base 340 can be fixed to one side end of the light machine housing 100 provided with the light source 210, and the heat pipe 330 is in thermal conduction connection with the heat conduction base 340. The heat pipe 330 is L-shaped, so that one segment of the heat pipe 330 is connected with the heat conduction base 340, and the other segment is arranged parallel to the X direction after being bent. The heat dissipation fin 320 is arranged opposite to the fan 310, and the heat pipe 330 is fixedly connected with the heat dissipation fin 320.

[0161] In this embodiment, due to its inherent characteristics, the light source LED 210 generates two types of energy. One portion, through radiated light energy, is absorbed by the optical device, which in turn converts this light energy into heat energy, causing the optical device to heat up. The air in the air inlet duct 102 heats up after exchanging heat with the optical device. The fan 310 uses an exhaust method to convey the air in the air inlet duct 102 out of the optical machine housing 100 through the heat dissipation channel 801. As the air passes through the heat dissipation fins 320, the heat dissipation fins 320 exchange heat with the air, thereby lowering the air temperature. This allows the air to cool as it flows from the optical machine housing 100 to other components, without affecting the heat dissipation of these components.

[0162] Another portion of the energy from the LED 210 is transferred to the heat-conducting base 340 via heat conduction, and then to the heat sink 320 via the heat pipe 330. After the heat sink 320 and the LED 210 exchange heat, the fan 310 blows away the heat from the heat sink 320. Therefore, the fan 310 in this embodiment can not only cool the optical device, but also reduce the temperature of the LED 210.

[0163] The light source LED 210 can be fixedly connected to the thermally conductive base 340. The light source LED 210 and the thermally conductive base 340 can be mounted on the first housing 110 and the second housing 120, for example, by screws. One end of the heat pipe 330 can be fixed to the thermally conductive base 340 by welding, and the heat dissipation fins 320 can also be fixed to the heat pipe 330 by welding. This ensures relative stability between the various structural components and ensures effective heat dissipation.

[0164] In some embodiments, reference Figure 25 The heat dissipation module 300 includes an aluminum extruded heat sink 350 disposed outside the optical engine housing 100. The aluminum extruded heat sink 350 may be generally L-shaped and may include a first heat dissipation portion 351 and a second heat dissipation portion 352 connected to each other. The first heat dissipation portion 351 is fixedly connected to the end of the optical engine housing 100 where the light source LED 210 is disposed. The second heat dissipation portion 352 may be bent relative to the first heat dissipation portion 351 and disposed directly opposite the fan 310.

[0165] The aluminum extruded heat sink 350 in this embodiment can be understood as an integrated structure of the heat dissipation fins 320, the heat conductive base 340 and the heat pipe 330 in the aforementioned embodiment. That is to say, the aluminum extruded heat sink 350 can not only play a heat conduction role, but also play a cooling role.

[0166] The second heat dissipation part 352 of the aluminum extrusion heat sink 350 can be provided with a plurality of heat dissipation holes 353 at the position facing the fan 310. The heat dissipation holes 353 are arranged through the aluminum extrusion heat sink 350 along the Z direction. After the fan 310 blows the gas in the light engine housing 100 out, the gas can pass through the heat dissipation holes 353, and the gas can exchange heat with the aluminum extrusion heat sink 350 in the heat dissipation holes 353, thereby cooling the gas.

[0167] Specifically, the opening rate of the aluminum extrusion heat sink 350 can be designed to be 40% to 65%, so as to increase the turbulence, reduce the flow rate, and enable the gas to fully exchange heat with the aluminum extrusion heat sink 350. Here, the opening rate of the aluminum extrusion heat sink 350 can be understood as the ratio of the total area of the heat dissipation holes 353 to the total area of the aluminum extrusion heat sink 350.

[0168] As an optional embodiment, as shown in Figure 25 , the plurality of heat dissipation holes 353 of the aluminum extrusion heat sink 350 can be arranged along the Y direction. Each heat dissipation hole 353 can be a strip-shaped hole, and the heat dissipation holes 353 extend along the X direction. In this way, by arranging a plurality of heat dissipation holes 353, the heat exchange area between the gas and the aluminum extrusion heat sink 350 is increased, thereby improving the heat dissipation efficiency.

[0169] On this basis, the size of the strip-shaped heat dissipation hole 353 along the X direction can be 36.4 mm, the size along the Y direction can be 2 mm, and the thickness of the fin (which can also be understood as the size between two adjacent heat dissipation holes 353) can be 1 mm. The heat dissipation hole 353 can be designed to have 9, at which time the opening rate of the aluminum extrusion heat sink 350 is 64.3%.

[0170] As another optional embodiment, as shown in Figure 26 , the plurality of heat dissipation holes 353 can be arranged in an array along the X direction and the Y direction. Each heat dissipation hole 353 can be a square, and the side length of the heat dissipation hole 353 can be 2 mm, and the thickness of the fin is 1 mm. Along the Y direction, 9 heat dissipation holes 353 are arranged, and along the X direction, 12 heat dissipation holes 353 are arranged, at which time the opening rate of the aluminum extrusion heat sink 350 is 42.4%.

[0171] In actual application, in addition to the above-mentioned strip shape, square, the heat dissipation hole 353 can also be branch shape, circular, etc., and the present embodiment does not limit this.

[0172] Reference Figure 27When the heat dissipation fins 320 or the aluminum extrusion heat sink 350 are arranged, a gap is provided between the fan 310 and the heat dissipation fins 320 or the aluminum extrusion heat sink 350 to avoid the noise of the fan 310 being amplified when the fan 310 is too close to the heat dissipation fins 320. For example, when the fan 310 is an axial fan as described in the foregoing embodiments, the gap D between the fan 310 and the heat dissipation fins 320 can be set to 4-6 mm to meet the noise requirement.

[0173] In addition, through simulation tests, it is found that the noise is the smallest when the gap between the fan 310 and the heat dissipation fins 320 is 5 mm. Therefore, in actual applications, the gap between the fan 310 and the heat dissipation fins 320 can be set to 5 mm.

[0174] In combination with the foregoing embodiments, it can be seen that the heat dissipation module 300 of the straight-cylinder type projection light machine has a compact structure. After the light machine housing 100 and the heat dissipation module 300 are assembled, the dimensions of the straight-cylinder type projection light machine in the X, Y and Z directions are 63.1 mm, 43.8 mm and 56.9 mm respectively, and the total volume of the straight-cylinder type projection light machine is ≤0.2 L, so that the overall size of the straight-cylinder type projection light machine can be reduced.

[0175] To further improve the heat dissipation effect inside the light machine housing 100, the gaps between the optical devices can also be designed to form an efficient heat dissipation system. At this time, the air gap distance between the first lens 203 and the first heat insulation glass 204 can be set to 0.95-1.15 mm, the air gap distance between the first heat insulation glass 204 and the display panel 205 can be set to 1.7-1.9 mm, the air gap distance between the display panel 205 and the second heat insulation glass 206 can be set to 1.43-1.63 mm, and the air gap distance between the second heat insulation glass 206 and the second lens can be set to 2.25-2.45 mm.

[0176] On this basis, by setting the gaps between the optical devices, in combination with the air inlet structure 400 and the first dustproof net 500 as shown in Figure 9 , simulation tests are conducted on the heat dissipation of the straight-cylinder type projection light machine, and the test data can be referred to Table 1 below.

[0177]

[0178] Table 1

[0179] As can be seen from Table 1, the display panel 205 and the light source LED 210 arranged in the light machine housing 100 can be effectively cooled.

[0180] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A straight tube projection optical engine, wherein, The application relates to a light engine shell, an optical module and a heat dissipation module. The light engine shell comprises a first shell and a second shell, the first shell and the second shell are connected to each other to form a containing space. The optical module is arranged in the containing space, the optical module comprises a first lens, a display panel and a second lens arranged in sequence along a main optical axis direction of the optical module, and an air inlet channel is formed between the first lens and the second lens. The first shell is provided with an air inlet structure communicating with the air inlet channel at a position opposite to the air inlet channel. The second shell is provided with an air outlet communicating with the air inlet channel at a position opposite to the air inlet channel, the heat dissipation module comprises a fan arranged in the second shell, and the fan is used for discharging gas in the air inlet channel from the air outlet to the light engine shell.

2. The straight-through projection printer of claim 1, wherein, The arrangement direction of the air inlet structure and the air outlet is the arrangement direction of the first shell and the second shell. The first shell comprises a first panel and a first side plate connected to the first panel, the first panel is arranged opposite to the air outlet, and the first side plate is connected to the second shell.

3. The straight-through projection printer of claim 2, wherein, The air inlet structure comprises an air inlet arranged in the first panel, and the orthogonal projection of the air inlet on the plane of the first panel covers the orthogonal projection of the air inlet channel on the plane of the first panel. The air inlet structure further comprises an air inlet panel connected to the side of the first panel away from the second shell, the air inlet panel is provided with a plurality of first air inlets, and the first air inlets communicate with the air inlet.

4. The straight-through projection printer of claim 3, wherein, The orthogonal projection of the air inlet panel on the plane of the first panel covers the orthogonal projection of the air inlet on the plane of the first panel, and the middle part of the air inlet panel along the main optical axis direction of the optical module has a gap with the plane of the first panel. The air inlet panel comprises a first connecting plate and a second connecting plate arranged along the main optical axis direction of the optical module. One end of the first connecting plate away from the first panel extends towards the second connecting plate, one end of the second connecting plate away from the first panel extends towards the first connecting plate, and the first connecting plate and the second connecting plate are connected to each other.

5. The straight-through projection printer of claim 4, wherein, The surface of the first connecting plate provided with the first air inlets is a plane, and the surface of the second connecting plate provided with the first air inlets is an arc surface curved towards the first panel.

6. The straight-through projection printer of claim 4, wherein, The air inlet panel is provided with a plurality of rows of first air inlets arranged along the main optical axis direction of the optical module, and each row of first air inlets comprises a plurality of first air inlets arranged at intervals along the long side direction of the display panel.

7. The straight barrel projector of claim 3, wherein, The air inlet panel is provided with a plurality of first air inlets arranged along the long side direction of the display panel, the first air inlets are strip-shaped holes, and the first air inlets extend along the extension direction of the air inlet panel. The air inlet structure further comprises two air inlet side plates arranged along the short side direction of the display panel, the air inlet side plates are connected to the first panel and connect the air inlet panel, and the air inlet side plates are provided with a plurality of second air inlets communicating with the air inlet.

8. The straight-through projection printer of claim 7, wherein, The surface of the air inlet side plate provided with the second air inlet hole is an arc surface curved towards the first panel; or The air inlet side plate is arranged perpendicularly to the first panel.

9. The straight-through projection printer of claim 3, wherein, Along the long direction of the display panel, the air inlet panel opposite sides are respectively matched with the first panel to form a second air inlet hole, and the second air inlet hole is communicated with the air inlet.

10. The straight barrel projector of claim 3, wherein, The opening rate of the air inlet structure is 10% to 45%.

11. The straight-through projection printer of claim 1, wherein, Further comprising a first dustproof net connected to the first casing, and the first dustproof net is arranged on the air inlet structure.

12. The straight-through projection printer of claim 11, wherein, The first dustproof net comprises a plurality of dustproof holes for filtering dust with a particle size greater than 90 microns, and the opening rate of the first dustproof net is 30% to 40%.

13. The straight barrel projector of claim 1, wherein, Further comprising a second dustproof net, and the second dustproof net is arranged on the air outlet side of the fan.

14. The straight tube projector of any of claims 1-13, wherein, The heat dissipation module further comprises a heat dissipation fin arranged outside the light and machine casing, and the heat dissipation fin is arranged opposite to the fan.

15. The straight-tube projection light engine according to claim 14, wherein: The optical module further comprises a light source LED close to one end of the light and machine casing, and the heat dissipation module further comprises a heat conduction base arranged outside the light and machine casing and a heat pipe; The heat conduction base is in heat conduction connection with the light source LED; The heat pipe is L-shaped, one end of the heat pipe is fixedly connected with the heat conduction base, and the other end of the heat pipe is fixedly connected with the heat dissipation fin.

16. The straight-through projection printer of claim 14, wherein, The fan is an axial flow fan, and the distance between the air outlet position of the fan and the heat dissipation fin is 4mm to 6mm.

17. The straight tube projection optical engine according to any one of claims 1 to 13, wherein, The optical module further comprises a light source close to one end of the light and machine casing, and the heat dissipation module further comprises an aluminum extrusion heat sink arranged outside the light and machine casing; The aluminum extrusion heat sink is L-shaped, one end of the aluminum extrusion heat sink is fixedly connected to one side of the light and machine casing where the light source is arranged, and the other end of the aluminum extrusion heat sink is arranged opposite to the fan, and a plurality of heat dissipation holes are arranged on the part of the aluminum extrusion heat sink opposite to the fan.

18. The straight barrel projector of claim 17, wherein, The plurality of heat dissipation holes are distributed along the short direction of the display panel, and the heat dissipation holes are strip-shaped structures extending along the main optical axis direction of the optical module.

19. The straight-tube projection light engine according to claim 17, wherein: The plurality of heat dissipation holes are arrayed along the main optical axis direction of the optical module and the long direction of the display panel, and the cross-sectional shape of the heat dissipation hole perpendicular to the short direction of the display panel is a square.

20. The straight-through projection printer of claim 1, wherein, Along the main optical axis direction of the optical module, there is a gap between the air outlet close to one end of the first lens and the first lens.

21. The straight-through projection printer of claim 20, wherein, The gap is 3.75mm to 4mm.

22. The straight-through projection printer of claim 20 or 21, wherein, The second casing is provided with a heat dissipation plate on the side away from the first casing, the heat dissipation plate is arranged around the air outlet, and the side of the heat dissipation plate away from the air outlet is provided with a communication port communicated with the outside of the light and machine casing, and the fan is arranged in the space surrounded by the heat dissipation plate.

23. The straight barrel projector of claim 22, wherein, The size of the communication port is larger than that of the air outlet; The heat dissipation plate comprises a transition section and a heat dissipation section arranged along the arrangement direction of the air outlet and the communication port, and along the direction from the air outlet to the communication port, the size of the transition section along the main optical axis direction of the optical module gradually increases; The fan is arranged in the heat dissipation section.

24. The straight-through projection printer of claim 1, wherein, The panel rubber frame is provided with a mounting groove in the middle part, is fixed to the inner wall of the optical machine shell, and the display panel is embedded in the mounting groove; Along the short edge direction of the display panel, the panel rubber frame is provided with a flow guide groove on both sides of the mounting groove, and the flow guide groove is communicated with the mounting groove.

25. The straight-through projection printer of claim 1, wherein, Along the main optical axis direction of the optical module, the first lens and the display panel are provided with the first heat insulation glass, and the display panel and the second lens are provided with the second heat insulation glass.

26. The straight-through projection printer of claim 25, wherein, The air gap distance between the first lens and the first heat insulation glass is 0.95mm-1.15mm; The air gap distance between the first heat insulation glass and the display panel is 1.7mm-1.9mm; The air gap distance between the display panel and the second heat insulation glass is 1.43mm-1.63mm; The air gap distance between the second heat insulation glass and the second lens is 2.25mm-2.45mm.

Images