Optical machine structure and projection device

Abstract

The invention discloses an optical-mechanical structure and a projection device. The optical-mechanical structure comprises a light source assembly (100) located in a light source assembly arrangement area (10) and a display assembly (200) located in a display assembly arrangement area (20), and the display assembly (200) comprises a first Fresnel lens (201), a display panel (202), a second Fresnel lens (203) and a reflective mirror (204) which are sequentially arranged in the direction away from the light source assembly (100). The display assembly arrangement area (20) comprises a first fan (205), a first cover body (CV1) and a second cover body (CV2), the first cover body (CV1) and the second cover body (CV2) are oppositely arranged, the display assembly (200) is arranged between the first cover body (CV1) and the second cover body (CV2), the first fan (205) is arranged on the side, close to the first cover body (CV1), of the reflective mirror (204), the display panel (202) comprises a first edge (2021) close to the first cover body (CV1), and the second edge (2021) is arranged on the side, close to the second cover body (CV2), of the reflective mirror (204). The length direction of a first air outlet (2051) of the first fan (205) is parallel to the extending direction of the first edge (2021), the first cover body (CV1) is provided with a first corner (CN) facing the first air outlet (2051), the first corner (CN) is configured to guide the air flowing out of the first air outlet (2051) to the first edge (2021), the width of the first air outlet (2051) is A, and the width of the first air outlet (2051) is A; the distance between the first Fresnel lens (201) and the second Fresnel lens (203) is B, and B is larger than A. The optical-mechanical structure has a better heat dissipation effect.

Description

Optical-mechanical structure and projection device Technical Field

[0001] Embodiments of the present disclosure relate to an optical-mechanical structure and a projection device. Background Art

[0002] A projector is a device that projects images or videos onto a screen. It can be connected to computers, game consoles, televisions, and other devices through various interfaces to play the corresponding video signals. Projectors are widely used in homes, offices, schools, and entertainment venues.

[0003] Currently, the main projection devices on the market include CRT (Cathode Ray Tube), LCD (Liquid Crystal Display), and DLP (Digital Light Processing) projection devices. LCD projection devices mainly include single-LCD and triple-LCD projection devices. Single-LCD projection devices have a simple structure and low cost, making them suitable for popularization among low- and middle-income groups, and therefore have considerable development prospects.

[0004] Summary of the Invention

[0005] At least one embodiment of the present disclosure provides an opto-mechanical structure, which has a light source assembly setting area and a display assembly setting area, and includes a light source assembly located in the light source assembly setting area and a display assembly located in the display assembly setting area, wherein the display assembly is located on the light-emitting side of the light source assembly, the display assembly includes a first mirror, a display panel, a second mirror, and a reflector arranged in sequence in a direction away from the light source assembly, the display assembly setting area includes a first fan and a first cover and a second cover arranged opposite to each other, the display assembly is arranged between the first cover and the second cover, the first fan is arranged on a side of the reflector close to the first cover, the display panel includes a first edge close to the first cover, the first fan includes a first air outlet, the length direction of the first air outlet is parallel to the extension direction of the first edge, the first cover has a first corner facing the first air outlet, the first corner is configured to guide the wind flowing out of the first air outlet toward the first edge and flow along the surface of the display panel, the width of the first air outlet is A, the distance between the first mirror and the second mirror is B, and B>A.

[0006] For example, in the optomechanical structure provided in at least one embodiment of the present disclosure, B=αA, and the value range of α is 1.10-1.50.

[0007] For example, in the optomechanical structure provided in at least one embodiment of the present disclosure, B=1.38A.

[0008] For example, in the optomechanical structure provided by at least one embodiment of the present disclosure, the length of the first air outlet is smaller than the length of the first side.

[0009] For example, in the optical-mechanical structure provided by at least one embodiment of the present disclosure, the cross-section of the first corner is a shape in which a first arc shape and a second arc shape are spliced ​​together, and the second arc shape is closer to the first air outlet than the first arc shape.

[0010] For example, in the optomechanical structure provided in at least one embodiment of the present disclosure, the curvature radius of the first arc is smaller than the curvature radius of the second arc.

[0011] For example, in the optomechanical structure provided in at least one embodiment of the present disclosure, the curvature radius of the first arc is 3 mm-4 mm, and the curvature radius of the second arc is 10 mm-75 mm.

[0012] For example, in the optomechanical structure provided in at least one embodiment of the present disclosure, the second arc includes a first arc segment connected to the first arc segment, a second arc segment close to the first air outlet, and an intermediate arc segment connecting the first arc segment and the second arc segment, and the curvature radius of the intermediate arc segment is smaller than the curvature radius of the first arc segment and the curvature radius of the second arc segment, and / or the curvature radius of the first arc segment is larger than the curvature radius of the second arc segment.

[0013] For example, in the optical-mechanical structure provided by at least one embodiment of the present disclosure, the curvature radius of the first arc is a constant value, and the curvature radius of the second arc gradually decreases from the end near the display component to the end near the first air outlet and then gradually increases.

[0014] For example, in the optomechanical structure provided by at least one embodiment of the present disclosure, the second arc has a protrusion protruding from the first arc, and the size of the protrusion in the width direction of the first air outlet is smaller than the size in the direction perpendicular to the first air outlet; and / or, the size of the protrusion in the width direction of the first air outlet is 1mm-2mm; and / or in the direction perpendicular to the first air outlet, the size of the protrusion is 1mm-2mm.

[0015] For example, in the optomechanical structure provided by at least one embodiment of the present disclosure, in the width direction of the first air outlet, the size of the first arc is 4mm-8mm, and the size of the second arc is 12mm-18mm; and / or, in the direction perpendicular to the first air outlet, the size of the first arc is 9mm-13mm, and the size of the second arc is 12mm-16mm.

[0016] For example, in the optical-mechanical structure provided by at least one embodiment of the present disclosure, in the width direction of the first air outlet, the size of the first corner is H1, the size of the first arc is (0.1-0.3)H1, and the size of the second arc is (0.7-0.9)H1; and / or, in the width direction of the first air outlet, the size of the first arc is (0.1-0.3)A, and the size of the second arc is (0.7-0.9)A.

[0017] For example, in the optomechanical structure provided in at least one embodiment of the present disclosure, in the width direction of the first air outlet, the size of the first arc minus the size of the protrusion is equal to 0.2*A, and the size of the second arc is 0.8*A.

[0018] For example, in the optomechanical structure provided in at least one embodiment of the present disclosure, the angle between the first arc and the second arc ranges from 80 degrees to 90 degrees.

[0019] For example, in the optomechanical structure provided in at least one embodiment of the present disclosure, the display assembly further includes a heat insulating member located between the first mirror and the display panel, a first gap is provided between the display panel and the heat insulating member, and the protrusion points to the first gap.

[0020] For example, in the optical-mechanical structure provided in at least one embodiment of the present disclosure, the vertical distance from the surface of the protrusion close to the display panel to the plane where the display panel is located is S1, and the vertical distance from the surface of the protrusion close to the thermal insulation member to the plane where the thermal insulation member is located is S2, and S1<S2.

[0021] For example, in the optomechanical structure provided in at least one embodiment of the present disclosure, S1 = (0.2-0.4) S2.

[0022] For example, in the optomechanical structure provided in at least one embodiment of the present disclosure, the first corner has a drainage inner wall, the drainage inner wall is arranged along the first side of the display panel, and the minimum length of the drainage inner wall is greater than or equal to the length of the first side of the display panel.

[0023] For example, in the optomechanical structure provided in at least one embodiment of the present disclosure, the first corner has a drainage inner wall, the drainage inner wall is arranged along the first side of the display panel, and the minimum length of the drainage inner wall is less than the length of the first side of the display panel.

[0024] For example, in the optomechanical structure provided in at least one embodiment of the present disclosure, the ratio of the minimum length of the drainage inner wall to the length of the first side of the display panel is 0.85-0.95.

[0025] For example, in the optical-mechanical structure provided in at least one embodiment of the present disclosure, a first drainage structure and a second drainage structure are respectively provided on both sides of the length direction of the first air outlet, and the minimum distance between the first drainage structure and the second drainage structure in the length direction is less than the length of the first side.

[0026] For example, in the optomechanical structure provided in at least one embodiment of the present disclosure, the ratio of the minimum distance to the length of the first side is 0.85-0.95.

[0027] For example, in the optical-mechanical structure provided in at least one embodiment of the present disclosure, the first fan has a first air inlet surface facing the reflector and a second air inlet surface away from the reflector, the first air inlet surface includes a first air inlet, and the second air inlet surface includes a second air inlet.

[0028] For example, in the optical-mechanical structure provided by at least one embodiment of the present disclosure, the distance between the second air inlet surface and the first cover body is in the range of 1.5 mm to 2.5 mm.

[0029] For example, in the optomechanical structure provided in at least one embodiment of the present disclosure, the ratio of the area of ​​the first air inlet to the area of ​​the second air inlet is (2-4):1.

[0030] For example, in the optical-mechanical structure provided by at least one embodiment of the present disclosure, the first air inlet includes a main air inlet, the second air inlet includes a plurality of auxiliary air inlets, the plurality of auxiliary air inlets are arranged around a center, and the orthographic projections of the plurality of auxiliary air inlets on the first air inlet surface are located within the main air inlet.

[0031] For example, in the optical-mechanical structure provided in at least one embodiment of the present disclosure, the shapes of the multiple auxiliary air inlets are fan-shaped, circular, or polygonal.

[0032] For example, in the optical-mechanical structure provided by at least one embodiment of the present disclosure, the display component setting area also includes a first shell, the first shell includes a first sub-shell located between the reflector and the first air inlet surface, the first sub-shell includes a shell opening exposing the main air inlet, and the area of ​​the shell opening is larger than the area of ​​the main air inlet so as to expose the main air inlet.

[0033] For example, in the optomechanical structure provided in at least one embodiment of the present disclosure, the diameter of the housing opening is 1.0 mm to 2.0 mm larger than the diameter of the main air inlet.

[0034] For example, in the optical-mechanical structure provided in at least one embodiment of the present disclosure, the shell opening includes a main opening and multiple secondary openings surrounding the main opening, and the area of ​​the main opening is larger than the area of ​​the main air inlet to expose the main air inlet.

[0035] For example, in the optomechanical structure provided by at least one embodiment of the present disclosure, the diameter of each of the plurality of secondary openings is 7 mm-9 mm.

[0036] For example, in the optical-mechanical structure provided by at least one embodiment of the present disclosure, the first shell also includes a second sub-shell connected between the first cover body and the second cover body, the second sub-shell has a first connecting portion on a side close to the first cover body, the first cover body has a second connecting portion, and the first connecting portion and the second connecting portion are elastically connected.

[0037] For example, in the optical-mechanical structure provided by at least one embodiment of the present disclosure, the first connecting part and the second connecting part are connected by a first bolt, the first bolt includes a threaded rod and a top located on one side of the threaded rod, and a first elastic member is provided between the top and the first connecting part, and / or between the top and the second connecting part, and / or between the first connecting part and the second connecting part.

[0038] For example, in the optical-mechanical structure provided in at least one embodiment of the present disclosure, first sealing portions are respectively provided on both sides of the first air outlet in the length direction to seal the gap between the first air outlet and the first cover.

[0039] For example, in the optomechanical structure provided by at least one embodiment of the present disclosure, the first corner has a drainage inner wall, and the drainage inner wall is provided with a bar grid array, and the bar grid array includes a plurality of drainage bar grids extending in a direction perpendicular to the first side and arranged along the direction of the first side, and there is a bar grid interval between adjacent drainage bar grids, and the plurality of bar grid intervals between the plurality of drainage bar grids are of different sizes, and the first air outlet has a first air outlet and a second air outlet at different positions, the air outlet speed at the first air outlet is greater than the air outlet speed at the second air outlet, and the bar grid interval corresponding to the first air outlet is smaller than the bar grid interval corresponding to the second air outlet.

[0040] For example, in the optical-mechanical structure provided in at least one embodiment of the present disclosure, the first fan includes a fan housing and two symmetrically arranged fan blades located in the fan housing, and the two fan blades are configured so that the larger air output is toward the center of the display panel.

[0041] For example, in the optical-mechanical structure provided in at least one embodiment of the present disclosure, the display component setting area also includes a second fan, which is set on the side of the reflector close to the second cover body, and the rotation directions of the first fan and the second fan are opposite.

[0042] For example, in the optomechanical structure provided in at least one embodiment of the present disclosure, the intervals between adjacent guide bars gradually increase in a direction from the first air outlet to the second air outlet.

[0043] For example, in the optical-mechanical structure provided by at least one embodiment of the present disclosure, a diverter wall is provided at the first air outlet, and the cross-section of the diverter wall is a third arc shape. The display component also includes a heat insulation member located between the first mirror and the display panel, and a first gap is provided between the display panel and the heat insulation member. The diverter wall has a first end and a second end opposite to each other, the first end points to the first gap, and the second end points to the first air outlet.

[0044] For example, in the optical-mechanical structure provided in at least one embodiment of the present disclosure, the vertical distance from the second end to the plane where the first air inlet surface is located is S3, and the vertical distance from the second end of the diverter wall to the plane where the second air inlet surface is located is S4, and S3 is smaller than S4.

[0045] For example, in the optomechanical structure provided in at least one embodiment of the present disclosure, S3=(0.4-0.6)S4.

[0046] For example, in the optical-mechanical structure provided in at least one embodiment of the present disclosure, the light source assembly includes a light source and a light cup located on the light-emitting side of the light source, the light source assembly setting area includes a third fan located on the side of the light source away from the display assembly and a light source heat sink located on opposite sides of the light cup, and a second elastic member is arranged between the light source heat sink and the surface of the third fan.

[0047] For example, in the optical-mechanical structure provided in at least one embodiment of the present disclosure, the light source heat dissipation element includes a first heat dissipation part and a second heat dissipation part, a second gap is provided between the first heat dissipation part and the second heat dissipation part, and the first heat dissipation part and the second heat dissipation part are connected by a heat pipe.

[0048] For example, in the optical-mechanical structure provided in at least one embodiment of the present disclosure, the third fan has a second air outlet surface, the second air outlet surface is rectangular, the size of the second gap in the direction perpendicular to the first air outlet surface is S5, the length of one side of the rectangle is S6, and S5=0.1S6.

[0049] For example, in the optical-mechanical structure provided in at least one embodiment of the present disclosure, the value range of S5 is 10 mm-12 mm.

[0050] For example, in the optical-mechanical structure provided by at least one embodiment of the present disclosure, the light source assembly includes a light source and an optical cup assembly located on the light-emitting side of the light source, the optical cup assembly includes a light cup and a light cup shell, a heat sink is attached to the outer surface of the light cup shell, the heat sink includes a base configured to fit with the light cup and a heat dissipation structure array located on the side of the base away from the light cup; the heat dissipation structure array includes heat dissipation columns arranged in multiple rows and columns, or the heat dissipation structure array includes a plurality of heat dissipation bars arranged at intervals.

[0051] For example, in the opto-mechanical structure provided in at least one embodiment of the present disclosure, the heat dissipation structure array includes heat dissipation columns arranged in multiple rows and columns, the heat dissipation columns are cylindrical, and the multiple rows and columns of heat dissipation columns include the Nth row of heat dissipation columns and the N+1th row of heat dissipation columns, and the Nth row of heat dissipation columns and the N+1th row of heat dissipation columns are staggered in the row direction, and N is a positive integer greater than or equal to 1.

[0052] For example, in the optical-mechanical structure provided by at least one embodiment of the present disclosure, the multiple rows and columns of heat dissipation columns include the Mth column of heat dissipation columns and the M+1th column of heat dissipation columns, and the Mth column of heat dissipation columns and the M+1th column of heat dissipation columns are staggered in the column direction, and M is a positive integer greater than or equal to 1; the pitch between the Nth row of heat dissipation columns and the N+1th row of heat dissipation columns in the column direction is P1, and the pitch between the Mth column of heat dissipation columns and the M+1th column of heat dissipation columns in the row direction is P2, and P1>P2.

[0053] At least one embodiment of the present disclosure provides a projection device, including the optical-mechanical structure provided by an embodiment of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, rather than limiting the present disclosure.

[0055] FIG1 is a front perspective schematic diagram of an optical-mechanical structure provided by at least one embodiment of the present disclosure;

[0056] FIG2 is a rear perspective schematic diagram of an optical-mechanical structure according to at least one embodiment of the present disclosure;

[0057] FIG3 is a top view of an optomechanical structure provided by at least one embodiment of the present disclosure;

[0058] FIG4 is a schematic cross-sectional view of the optical-mechanical structure along line AA in FIG3 ;

[0059] FIG5 is a plan view of an optical-mechanical structure display panel and a first air outlet according to at least one embodiment of the present disclosure;

[0060] FIG6A is an enlarged schematic diagram of the optomechanical structure in FIG4 in the dotted-line area;

[0061] FIG6B is a schematic cross-sectional view of a first corner of an optomechanical structure according to at least one embodiment of the present disclosure;

[0062] FIG6C is a schematic cross-sectional view of a first corner of the optomechanical structure according to at least one embodiment of the present disclosure;

[0063] FIG7 is a schematic plan view of a first air inlet surface of a first fan in an optical-mechanical structure provided by at least one embodiment of the present disclosure;

[0064] FIG8 is a schematic plan view of a second air inlet surface of a first fan in an optical-mechanical structure provided by at least one embodiment of the present disclosure;

[0065] FIG9 is another plan view of a first air inlet surface of a first fan in the optical-mechanical structure provided by at least one embodiment of the present disclosure;

[0066] FIG10 is a schematic plan view of a first sub-housing of a first housing of an opto-mechanical structure provided by at least one embodiment of the present disclosure;

[0067] FIG11 is a schematic diagram illustrating the connection between the second sub-housing of the first housing and the first cover of the opto-mechanical structure provided by at least one embodiment of the present disclosure;

[0068] FIG12 is another cross-sectional schematic diagram of the optical-mechanical structure along line AA in FIG3 ;

[0069] FIG13 is a top plan view of a first fan and a first corner in an optical-mechanical structure provided by at least one embodiment of the present disclosure;

[0070] FIG14 is another schematic cross-sectional view of the optical-mechanical structure along line AA in FIG3 ;

[0071] FIG15 is an enlarged schematic diagram of the optical-mechanical structure in FIG14 at the first corner;

[0072] FIG16 is another top plan view of the first fan and the first corner of the optical-mechanical structure provided by at least one embodiment of the present disclosure;

[0073] FIG17 is another schematic structural diagram of the first fan in the optical-mechanical structure provided by at least one embodiment of the present disclosure;

[0074] FIG18 is a schematic diagram illustrating the arrangement of a first fan and a second fan in an optical-mechanical structure provided by at least one embodiment of the present disclosure;

[0075] FIG19 is a schematic diagram illustrating the arrangement of a first fan and a drainage structure in an optical-mechanical structure according to at least one embodiment of the present disclosure;

[0076] FIG20 is an enlarged schematic diagram of the optomechanical structure in FIG12 in the dotted-line frame area;

[0077] FIG21 is a schematic structural diagram of a light source heat sink in an optical-mechanical structure according to at least one embodiment of the present disclosure;

[0078] FIG22 is a schematic structural diagram of an optical cup and a heat sink in an optical-mechanical structure provided by at least one embodiment of the present disclosure; and

[0079] 23-25 ​​are schematic diagrams of various structures of heat sinks in an optical-mechanical structure provided in at least one embodiment of the present disclosure. DETAILED DESCRIPTION

[0080] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0081] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by persons of ordinary skill in the field to which this disclosure belongs. The words "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0082] The primary structure of a projection device is its optomechanical architecture, which typically includes a light source assembly and a display assembly. The light source assembly includes a light source that provides brightness, while the display assembly includes a display panel, such as a liquid crystal display (LCD), that forms the display image. Both the light source and the display panel generate a significant amount of heat during operation, which must be dissipated through a specific heat dissipation structure to ensure proper operation of the device.

[0083] At least one embodiment of the present disclosure provides an opto-mechanical structure, which has a light source component setting area and a display component setting area, and includes a light source component located in the light source component setting area and a display component located in the display component setting area, wherein the display component is located on the light emitting side of the light source component, the display component includes a first mirror, a display panel, a second mirror and a reflector arranged in sequence in a direction away from the light source component, the display component setting area includes a first fan and a first cover body and a second cover body arranged opposite to each other, the display component is arranged between the first cover body and the second cover body, the first fan is arranged on a side of the reflector close to the first cover body, the display panel includes a first edge close to the first cover body, the first fan includes a first air outlet, the length direction of the first air outlet is parallel to the extension direction of the first edge, the first cover body has a first corner facing the first air outlet, the first corner is configured to be able to guide the wind direction of the wind flowing out of the first air outlet to the first edge and flow along the surface of the display panel, the width of the first air outlet is A, the distance between the first mirror and the second mirror is B, B>A.

[0084] In the above-mentioned optical-mechanical structure provided in the embodiment of the present disclosure, the width B of the first air outlet is greater than the distance A between the first mirror and the second mirror. Thus, a larger ventilation duct is provided between the first mirror and the second mirror. When the wind blown out from the first air outlet by the first fan passes through the gap between the first mirror and the second mirror, it can fully exchange heat with the display panel, thereby improving the heat dissipation efficiency.

[0085] The following describes in detail the optical-mechanical structure and the shadow-transmitting device provided by the embodiments of the present disclosure through several specific embodiments.

[0086] At least one embodiment of the present disclosure provides an optomechanical structure. Figure 1 shows a front perspective view of the optomechanical structure, Figure 2 shows a rear perspective view of the optomechanical structure, Figure 3 shows a top view of the optomechanical structure, and Figure 4 shows a schematic cross-sectional view of the optomechanical structure along line AA in Figure 3 . The figures define mutually perpendicular X, Y, and Z directions to facilitate description of the relative positions of various structures in three-dimensional space.

[0087] As shown in FIG. 1 to FIG. 4 , the optomechanical structure has a light source component setting area 10 and a display component setting area 20 , and includes a light source component 100 located in the light source component setting area 10 and a display component 200 located in the display component setting area 20 .

[0088] As shown in FIG4 , the light source assembly 100 may include a light source 101 and a light guide 102, such as a light cup assembly, located on the light emitting side (right side in the figure) of the light source 101. The light guide 102 is configured to fully diffuse the light emitted by the light source 101 to the display assembly 200. For example, the light source 101 may be a light source of various forms, such as a light emitting diode (LED).

[0089] The display component 200 is located on the light-emitting side of the light source component 100 (the right side in the figure). The display component 200 includes a first mirror 201, a display panel 202, a second mirror 203 and a reflector 204, which are arranged in sequence along the direction away from the light source component 100 (the Z direction in the figure). The light emitted from the light source component 100 can pass through the first mirror 201, the display panel 202, the second mirror 203 and the reflector 204 in sequence to the projection outlet EX, thereby realizing projection display.

[0090] For example, the reflecting mirror 204 is configured to reflect the direction of the light emitted from the second mirror 203 from the Z direction to the X direction so that the light can be emitted from the projection exit EX.

[0091] The display component setting area 20 includes a first fan 205 and a first cover body CV1 and a second cover body CV2 arranged opposite to each other. The display component 200 is set between the first cover body CV1 and the second cover body CV2. The first fan 205 can be used to dissipate heat for the display panel 202. The first fan 205 is set on the side of the reflector 204 close to the first cover body CV1.

[0092] FIG5 shows a front view of the display panel and the first air outlet of the first fan in the optical-mechanical structure. As shown in FIG5 , the display panel 202 includes a first side 2021 proximate to the first cover CV1. For example, the display panel 202 is rectangular and includes a long side and a short side. The first side 2021 is, for example, the long side of the display panel 202. The first fan 205 includes a first air outlet 2051. The length direction of the first air outlet 2051 is parallel to the extension direction of the first side 2021. Thus, the air blown out from the air outlet can be blown into the first side 2021 (i.e., the long side) of the display panel 202, and the blown air can be blown out from the second side 2022 opposite the first side 2021 along the short side of the display panel, i.e., the Y direction in the figure. This shortens the path of the air blown, and can more effectively remove the heat emitted by the display panel 202.

[0093] In the embodiment of the present disclosure, since the temperature of the wind is lower when it blows toward the surface of the display panel 202 from the first side 2051, when the wind blows out of the surface of the display panel 202 from the second side 2022, due to the temperature difference between the wind and the surface of the display panel 202, heat exchange is generated between the two, causing the surface temperature of the display panel to become lower and the temperature of the wind to become higher. At this time, a temperature difference will be formed between the first side 2021 and the second side 2022. If this temperature difference is greater than 20°C, the display panel 202 will form a large color temperature difference, causing the projection display effect to have an uneven picture. In view of this, by setting the wind flow direction to have the long side inlet and the long side outlet, the wind distance through the display panel 202 is shorter, thereby effectively reducing the temperature difference of the display panel 202 and avoiding adverse phenomena such as poor projection display effect.

[0094] For example, Figure 6 shows an enlarged view of the optical-mechanical structure in Figure 4 in the dotted box area. As shown in Figure 6, the first cover body CV1 has a first corner CN facing the first air outlet 2051. The first corner CN is configured to guide the wind direction of the wind flowing out of the first air outlet 2051 to the first edge 2021. Referring to Figure 4, the wind can flow along the surface of the display panel 202 to the inner side of the second cover body CV2, and pass through both sides of the reflector 204 and enter the first fan 205 again from above the first fan 205, thereby forming a wind circulation to take away the heat emitted by the display panel 202.

[0095] For example, as shown in FIG6A , the width of first air outlet 2051 (i.e., the dimension along the Y direction in the figure) is A, the distance between first mirror 201 and second mirror 203 is B (i.e., the distance in the Z direction from the surface of first mirror 201 near second mirror 203 to the surface of second mirror 203 near first mirror 201 is B), and B>A. Thus, a larger air channel is formed between first mirror 201 and second mirror 203. When air from first air outlet 2051 reaches between first mirror 201 and second mirror 203, it can fully exchange heat with the display panel, thereby improving heat dissipation efficiency.

[0096] For example, in some embodiments, B=αA, and the value range of α is 1.10-1.50, such as 1.10, 1.15, 1.20, 1.25, 1.30, 1.35, 1.40, 1.45, or 1.50. Preferably, when the value of α is 1.38, that is, B=1.38A, the heat dissipation effect of the display panel 202 is optimal, the peak temperature of the display panel 202 is lower, and the size of the first fan 205 is thinner, so that the thickness of the projection device including the optical-mechanical structure is thinner, thereby achieving a lightweight and portable projection device.

[0097] For example, in some embodiments, the distance B between the first filter and the second filter may be 15 mm to 30 mm, such as 15 mm, 16 mm, 18 mm, 20 mm, 24 mm, 26 mm, or 30 mm. For example, the width A of the first air outlet may be 10 mm to 30 mm, such as 10 mm, 15 mm, 20 mm, 25 mm, or 30 mm.

[0098] For example, in some embodiments, referring to FIG7 , the length L3 of the first air outlet 2051 of the first fan 205 is less than or equal to the length L1 of the first side 2021 of the display panel 202. During use of the display panel 202, the middle portion of the display panel 202 is more likely to generate and accumulate heat. With the above arrangement, the air blown out from the first air outlet 2051 can at least be blown toward the middle portion of the display panel 202, thereby reducing the heat in the middle portion of the display panel 202 and lowering the peak temperature of the display panel 202 during use.

[0099] For example, in some embodiments, the first fan 205 has a first air inlet surface 205A facing the reflector 204 and a second air inlet surface 205B facing away from the reflector 204. Figures 7 and 8 respectively illustrate schematic diagrams of the first air inlet surface 205A and the second air inlet surface 205B of the first fan 205. As shown in Figures 7 and 8, the first air inlet surface 205A includes a first air inlet 2052, and the second air inlet surface 205B includes a second air inlet 2053. The first air inlet 2052 and the second air inlet 2053 are both used to take in air from the first fan 205, and the incoming air is blown out through the first air outlet 2051.

[0100] Due to the fact that the air volume and pressure of the fan with double air inlets at the same speed will be greater than that of the single air inlet design, and the noise of the double air inlet is less than that of the single air inlet, in the embodiment of the present disclosure, by setting the first fan 205 to have double-sided air inlets, the wind can enter from the first air inlet 2052 of the first air inlet surface 205A, and can also enter from the second air inlet 2053 of the second air inlet surface 205B, thereby increasing the air intake of the first fan 205. Since the air output of the first air outlet 2051 of the first fan 205 is equal to the air intake of the first air inlet 2052 and the second air inlet 2053, the air output and air speed of the first air outlet 2051 can be increased while the area of ​​the first air outlet 2051 remains unchanged, thereby increasing the wind circulation rate of the first fan 205.

[0101] For example, in some embodiments, the ratio of the area of ​​the first air inlet 2052 to the area of ​​the second air inlet 2053 is (2-4):1, such as 2:1, 3:1, or 4:1. Through testing, when the ratio of the area of ​​the first air inlet 2052 to the area of ​​the second air inlet 2053 is 3:1, the ratio of the air intake volume of the first air inlet 2052 to the second air inlet 2053 is approximately 7:3. At this time, the overall air intake volume of the first fan 205 is greater.

[0102] For example, in some embodiments, as shown in FIG7 , the first air inlet 2052 may include a main air inlet M1, and as shown in FIG8 , the second air inlet 2053 may include a plurality of auxiliary air inlets M2 (three are shown in the figure as an example), and the plurality of auxiliary air inlets M2 are arranged around a center O. For example, the center O may correspond to the rotation center of the fan blades.

[0103] For example, in some embodiments, the orthographic projections of the plurality of auxiliary air inlets M2 on the first air inlet surface 205A are located within the main air inlet M1, so that the main air inlet M1 and the plurality of auxiliary air inlets M2 are concentrated at the fan blades to increase the air intake volume.

[0104] For example, in some embodiments, the shape of the multiple auxiliary air inlets M2 can be a fan, a circle or a polygon (such as a triangle, a rectangle or a polygon with more sides, etc.) or a deformed shape of these figures, such as some corners of these figures are formed as rounded corners, some edges of these figures are formed as curved edges, and other deformed shapes.

[0105] For example, the shape of the auxiliary air inlet M2 shown in FIG8 can be considered as a deformation of a polygon, such as by transforming the corners of the triangle into rounded corners and the sides of the triangle into curved sides. For example, FIG9 shows an example in which the auxiliary air inlet M2 is circular. As shown in FIG9 , multiple auxiliary air inlets M2 are circular, and the sizes of the multiple auxiliary air inlets M2 can be different. For example, the multiple auxiliary air inlets M2 include two layers of circular auxiliary air inlets M2 surrounding a center O, and the diameter of the layer of circular auxiliary air inlets M2 closer to the center O is smaller than the diameter of the layer of circular auxiliary air inlets M2 farther from the center O. For example, in some examples, the diameter of the layer of circular auxiliary air inlets M2 closer to the center O can be 4 mm to 6 mm, such as 4 mm, 5 mm, or 6 mm, and the diameter of the layer of circular auxiliary air inlets M2 farther from the center O can be 9 mm to 11 mm, such as 9 mm, 10 mm, or 11 mm.

[0106] For example, in some embodiments, as shown in FIG6A , the distance C between the second air inlet surface 205B and the first cover CV1 ranges from 1.5 mm to 2.5 mm, such as 1.5 mm, 1.75 mm, 2.0 mm, 2.25 mm, or 2.5 mm. For example, the distance C between the second air inlet surface 205B and the first cover CV1 is adjustable (described in detail later), such that the distance C between the second air inlet surface 205B and the first cover CV1 can vary within the aforementioned range. An air inlet channel for the second air inlet surface 205B can be formed between the second air inlet surface 205B and the first cover CV1, allowing some air to enter the first fan 205 from the second air inlet surface 205B.

[0107] For example, in some embodiments, as shown in FIG4 , the display assembly placement area 20 further includes a first housing CV3 , which includes a first sub-housing CV31 located between the reflector 204 and the first air inlet surface 205A. The first sub-housing CV31 includes a housing opening CV32 that exposes the main air inlet M1 . The area of ​​the housing opening CV32 is larger than that of the main air inlet M1 , thereby exposing the main air inlet M1 , thereby facilitating rapid air entry into the main air inlet M1 .

[0108] For example, Figure 10 shows a plan schematic diagram of the first sub-shell CV31. In some embodiments, as shown in Figure 10 and Figure 7, the diameter D2 of the shell opening CV32 is 1.0mm-2.0mm larger than the diameter D1 of the main air inlet M1, for example, 1.0mm, 1.2mm, 1.5mm, 1.7mm or 2.0mm, etc., thereby ensuring that the shell opening CV32 can fully expose the main air inlet M1 and allowing corresponding assembly errors during the assembly process.

[0109] For example, in some embodiments, as shown in Figure 10, the shell opening CV32 includes a main opening HL1 and multiple secondary openings HL2 surrounding the main opening HL1. The area of ​​the main opening HL1 is larger than the area of ​​the main air inlet M1 to expose the main air inlet M1 and is used for the main air inlet M1 to take in air. The multiple secondary openings HL2 are used to ventilate the multiple secondary air inlets M2, allowing wind to pass through the multiple secondary openings HL2 and then flow through the gap between the second air inlet surface 205B and the first cover body CV1 to enter the multiple secondary air inlets M2.

[0110] For example, in some embodiments, the diameter D3 of each secondary opening HL2 can be 7 mm to 9 mm, such as 7 mm, 7.5 mm, 8 mm, 8.5 mm, or 9 mm. Thus, the multiple secondary openings HL2 have a sufficiently large opening area to allow air to flow through the multiple secondary air inlets M2, allowing the multiple secondary air inlets M2 to have a greater air intake. For example, in other embodiments, while ensuring the strength of the first sub-housing CV31, the size of the secondary openings HL2 can be further increased to further increase the air intake of the multiple secondary air inlets M2.

[0111] For example, in some embodiments, as shown in Figure 11, the first shell CV3 may also include a second sub-shell CV33 connected between the first cover body CV1 and the second cover body CV2, and the side of the second sub-shell CV33 close to the first cover body CV1 has a first connection part CL1, and the first cover body CV1 has a second connection part CL2, and the first connection part CL1 and the second connection part CL2 are elastically connected.

[0112] For example, as shown in Figure 11, the first connecting portion CL1 and the second connecting portion CL2 are connected by a first bolt CL3. The first bolt CL3 includes a threaded rod CL32 and a top portion CL31 located on one side of the threaded rod CL32. A first elastic member F1 is provided between the top portion CL31 and the first connecting portion CL1, and / or between the top portion CL31 and the second connecting portion CL2, and / or between the first connecting portion CL1 and the second connecting portion CL2. Figure 11 shows that the top portion CL31 is located at the second connecting portion CL2, and the first elastic member F1 is provided between the top portion CL31 and the second connecting portion CL2, and between the first connecting portion CL1 and the second connecting portion CL2.

[0113] For example, in the embodiment of FIG11 , the first connection portion CL1 is a threaded connection portion protruding from the second sub-housing CV33, the threaded connection portion having a threaded hole, and the second connection portion CL2 can be plate-shaped, the plate-shaped second connection portion CL2 having a threaded hole that matches the threaded hole. In this case, the threaded rod CL32 is screwed in from one side of the second connection portion CL2, the top portion CL31 is located at the second connection portion CL2, and a first elastic member F1 is provided between the top portion CL31 and the second connection portion CL2, as well as between the first connection portion CL1 and the second connection portion CL2. For example, in other embodiments, the top portion CL31 may also be located at the first connection portion CL1, in which case a first elastic member F1 is provided between the top portion CL31 and the first connection portion CL1, as well as between the first connection portion CL1 and the second connection portion CL2.

[0114] For example, in some embodiments, the first elastic member F1 can be made of a flexible, compressible rubber, foam, or other elastic member with a certain elasticity to achieve an elastic connection. Thus, when shaking occurs between the first cover CV1 and the second sub-housing CV33, the first elastic member F1 can act as a buffer and shock absorber between the first cover CV1 and the second sub-housing CV33, preventing loud noise and mechanical wear. Furthermore, by screwing the first bolt CL3 in and out, the degree of compression of the first elastic member F1 can be increased or decreased, thereby also adjusting the distance C between the second air inlet surface 205B and the first cover CV1 (see FIG6 ).

[0115] For example, in some embodiments, the first bolt CL3 can be a bolt with a threaded rod CL32 having a length of 3 mm (6 pcs teeth) or 4 mm (8 pcs teeth). The embodiments of the present disclosure do not limit the specific form of the first bolt CL3.

[0116] For example, in some embodiments, the structure of the first corner CN may be designed to have a better wind-guiding effect on the wind blown out of the first air outlet 2051 .

[0117] For example, in some embodiments, as shown in FIG6A , the cross-section of the first corner CN is a combination of a first arc A1R and a second arc AR2, with the second arc AR2 being closer to the first air outlet 2051 than the first arc AR1. The first arc A1R and the second arc AR2 can guide the air blowing out from different positions of the first air outlet 2051 differently.

[0118] For example, in some embodiments, as shown in FIG. 6A , the radius of curvature of the first arc AR1 is smaller than the radius of curvature of the second arc AR2 , so that the curvature of the second arc AR2 is more gradual than that of the first arc AR1 .

[0119] For example, in some examples, the curvature radius of the first arc AR1 can be 3mm-4mm, such as 3mm, 3.5mm or 4mm, and the curvature radius of the second arc AR2 can be 10mm-75mm, such as 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm or 75mm, etc.

[0120] For example, in some embodiments, as shown in Figure 6C, the second arc AR2 includes a first arc segment AR21 connected to the first arc segment AR1, a second arc segment AR22 close to the first air outlet 2051, and an intermediate arc segment AR23 connecting the first arc segment AR21 and the second arc segment AR21, and the curvature radius of the intermediate arc segment AR23 is smaller than the curvature radius of the first arc segment AR21 and the curvature radius of the second arc segment AR22.

[0121] For example, the curvature radius of the first arc segment AR21 is greater than the curvature radius of the second arc segment AR22.

[0122] For example, in some embodiments, the radius of curvature of the first arc segment AR21 is 65 mm-75 mm, the radius of curvature of the second arc segment AR22 is 25 mm-35 mm, and the radius of curvature of the middle arc segment AR23 is 10 mm-65 mm.

[0123] For example, the radius of curvature of the first arc AR1 is a constant value. For example, the length of the portion of the first arc AR1 having the curvature is 4 mm to 6 mm, such as 4 mm, 4.5 mm, 5 mm, 5.5 mm, or 6 mm. For example, the radius of curvature of the second arc AR2 gradually decreases and then gradually increases from the end near the display assembly to the end near the first air outlet, that is, from the first arc segment AR21 to the second arc segment AR22. For example, in the direction from the first arc segment AR21 to the second arc segment AR22, the radius of curvature of the middle arc segment AR23 gradually decreases to a minimum value and then gradually increases. For example, the minimum value of the curvature radius is in the middle of the middle arc segment AR23, such as the portion indicated by the label AR23, and the curvature radius is approximately 10 mm.

[0124] In the embodiment of the present disclosure, the middle arc segment AR23 of the second arc AR2 has a larger curvature radius, so that the wind diversion effect can be fully realized, so that the wind blown out from the first air outlet 2051 can be fully diverted to the display panel 202. The first arc segment AR21 has a larger curvature radius, and the wind diverted by the middle arc segment AR23 can be smoothly and steadily guided to the display panel 202, thereby generating heat exchange with the display panel 202 and improving the heat dissipation efficiency.

[0125] For example, in some embodiments, as shown in FIG6A , the second arc AR2 has a protrusion AR3 that protrudes from the first arc AR1, and the display assembly 200 further includes a heat insulating member 206, such as a heat insulating board or heat insulating glass, located between the first lens 201 and the display panel 202. FIG6B shows an enlarged schematic diagram of the first corner. As shown in FIG6B , the air blown out from the first air outlet 2051 can be divided into two streams. The first stream 1 is directed through the first arc AR1 to the first channel 11 between the first lens 201 and the heat insulating member 206 and the second channel 12 between the heat insulating member 206 and the display panel 202. The second stream 2 is directed through the second arc AR2 to the third channel 13 between the display panel 202 and the second lens 203 and the second channel 12 between the heat insulating member 206 and the display panel 202.

[0126] In an embodiment of the present disclosure, the wind flowing through the first channel 11 can reduce the temperature of the first mirror 201 and the thermal insulation member 206, the wind flowing through the second channel 12 can reduce the temperature of the thermal insulation member 206 and the display panel 202, and the wind flowing through the third channel 13 can reduce the temperature of the display panel 202 and the second mirror 203. Therefore, through the three air guide channels, the overall heat dissipation effect of the display component 200 can be better improved.

[0127] For example, in some embodiments, as shown in FIG6B , a first gap D1 is defined between the display panel 202 and the thermal insulation member 206 , and the protrusion AR3 points toward the first gap D1 .

[0128] For example, in some embodiments, as shown in FIG6B , the vertical distance between the surface AR31 of the protrusion AR3 proximate to the display panel 202 and the plane of the display panel 202 (e.g., the plane of the surface of the display panel 202 proximate to the thermal insulation member 206) is S1, and the vertical distance between the surface AR32 of the protrusion AR3 proximate to the thermal insulation member 206 and the plane of the thermal insulation member 206 (e.g., the plane of the surface of the thermal insulation member 206 proximate to the display panel 202) is S2, where S1 < S2. That is, the protrusion AR3 is directed closer to the display panel 202 than to the thermal insulation member 206, thereby allowing the second airflow 2 with a larger volume to be directed through the second arc AR2 and have a higher wind speed on both sides of the display panel 202, thereby removing more heat emitted by the display panel 202 and increasing the wind circulation rate and the number of wind cycles per unit time.

[0129] For example, in some embodiments, S1 = (0.2-0.4) S2, such as S1 = 0.2S2, such as S1 = 0.3S2, such as S1 = 0.4S2. Through testing, when S1 = 0.3S2, the first corner CN has the best air guide effect and better heat dissipation effect on the display panel 202.

[0130] For example, in some embodiments, in a direction perpendicular to the first air outlet 2051, in the horizontal direction in the figure, the size of the first gap D1 is 4 mm-6 mm, for example, 5 mm. For example, S2 is 2.4 mm-2.6 mm, for example, 2.5 mm, and S1 is 0.7 mm-0.9 mm, for example, 0.8 mm.

[0131] For example, through testing, it has been found that designing the cross section of the first corner CN to be in the form of two arcs joined together can reduce the peak temperature of the display panel 202 by approximately 10%.

[0132] For example, in some embodiments, as shown in FIG6B , in the width direction of the first air outlet 2051, that is, in the Y direction in the figure, the size H11 of the first arc AR1 is 4 mm-8 mm, for example, 4 mm, 5 mm, 6 mm, 7 mm or 8 mm, etc. In one example, the size H11 of the first arc AR1 is 5.88 mm, and the size H12 of the second arc AR2 is 12 mm-18 mm, for example, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm or 18 mm, etc. In one example, the size H12 of the second arc AR2 is 15 mm. For example, in the width direction perpendicular to the first air outlet 2051, that is, the Z direction in the figure, the size W1 of the first arc AR1 is 9mm-13mm, for example, 9mm, 10mm, 11mm, 12mm or 13mm, etc. For example, in one example, the size W1 of the first arc AR1 is 10.3mm or 11.5mm, and the size W2 of the second arc AR2 is 12mm-16mm, for example, 12mm, 13mm, 14mm, 15mm or 16mm, etc. For example, in one example, the size W2 of the second arc AR2 is 14.8mm.

[0133] For example, in some embodiments, in the width direction of the first air outlet 2051, the size of the first corner CN is H1, the size H11 of the first arc AR1 is (0.1-0.3) H1, for example, the size H11 of the first arc AR1 is 0.2H1, and the size H11 of the second arc AR2 is (0.7-0.9) H1, for example, the size H11 of the second arc AR2 is 0.8H1.

[0134] For example, in some embodiments, in the width direction of the first air outlet 2051, the size of the first arc AR1 is (0.1-0.3)A, for example, the size of the first arc AR1 is 0.2A, and the size of the second arc AR2 is (0.7-0.9)A, for example, the size of the second arc AR2 is 0.8A.

[0135] For example, in some embodiments, in the width direction of the first air outlet 2051, the size H11 of the first arc AR1 minus the size H13 of the protrusion AR32 is equal to 0.2*A, that is, the width of the first strand 1 in the Y direction is basically equal to 0.2*A, and the size H12 of the second arc AR2 is 0.8*A, that is, the width of the second strand 2 in the Y direction is basically equal to 0.8*A.

[0136] Through testing, it is found that by setting the above-mentioned dimensions of the first arc AR1 and the second arc AR2, the first corner CN can better distribute the wind blown out from the first air outlet 2051, so that the wind can be fully blown into the above-mentioned three air guide channels, thereby improving the heat dissipation effect of the display component 200.

[0137] For example, in some embodiments, as shown in FIG. 6B , the angle β between the first arc AR1 and the second arc AR2 ranges from 80 degrees to 90 degrees, such as 80 degrees, 83 degrees, 85 degrees, 88 degrees, or 90 degrees.

[0138] For example, in some embodiments, as shown in FIG6B , the protrusion AR3 is basically arranged in a direction parallel to the surface of the display panel 202, such as the Y direction in the figure, so that the wind from the protrusion AR3 is basically blown out to the second channel 12 along the Y direction and has a faster flow rate.

[0139] For example, in some embodiments, the dimension of the protrusion AR3 in the width direction of the first air outlet 2051 is smaller than the dimension in the direction perpendicular to the first air outlet 2051. For example, the dimension of the protrusion AR3 in the width direction of the first air outlet 2051 (i.e., the Y direction in the figure) is approximately 1 mm to 2 mm, for example, 1.5 mm. In the direction perpendicular to the first air outlet 2051, i.e., the Z direction in the figure, the dimension of the protrusion AR3 is 1 mm to 2 mm, for example, 1.75 mm.

[0140] For example, in some other embodiments, the second arc AR2 may not protrude from the first arc AR1, that is, it may not have the above-mentioned protrusion AR3. In this case, the end of the second arc AR2 close to the first arc AR1 may have a setting basically the same as the protrusion AR3, for example, basically along a direction parallel to the surface of the display panel 202, such as the Y direction in the figure, so as to have a technical effect basically the same as the protrusion AR3.

[0141] For example, in other embodiments, the first corner CN may also adopt other structures. For example, Figure 12 shows another structural schematic diagram of the first corner CN. As shown in Figure 12, the first corner CN has a drainage inner wall CN1, and the drainage inner wall CN1 is provided with a strip grid array GT.

[0142] For example, Figure 13 shows a top view of the bar grid array GT and the first fan 2051. As shown in Figure 13, the bar grid array GT includes a plurality of diversion bar grids DT1 extending in a direction perpendicular to the first edge 2021 (for example, along the YZ plane) and arranged along the direction of the first edge 2021 (the X direction in the figure). There is a bar grid interval GT2 between adjacent diversion bar grids DT1, and the sizes of the plurality of bar grid intervals GT2 between the plurality of diversion bar grids GT1 are different. For example, the first air outlet 2051 has a first air outlet 2051A and a second air outlet 2051B at different positions. The air outlet speed of the first air outlet 2051A is greater than the air outlet speed of the second air outlet 2051B, and the bar grid interval GT2 corresponding to the first air outlet 2051A is smaller than the bar grid interval GT2 corresponding to the second air outlet 2051B.

[0143] For example, as shown in FIG12 , the air velocity of the first air outlet 2051 gradually decreases from the first air outlet 2051A to the second air outlet 2051B, and the bar spacing GT2 between adjacent guide bars GT1 gradually increases. For example, in some embodiments, the pitch of the guide bars GT1 corresponding to the maximum air volume (i.e., the distance between the centers of adjacent guide bars GT1) is 3.5 mm, and the pitch increases at a rate of 0.5 mm from the maximum air volume to the minimum air volume. That is, the bar spacing GT2 from the maximum air volume to the minimum air volume is 3.5 mm, 4.0 mm, 4.5 mm, 5.0 mm, 5.5 mm, and so on.

[0144] For example, in other embodiments, the bar array GT may also include a portion with a gradually changing bar spacing and a portion with a constant bar spacing. The portion with a gradually changing bar spacing corresponds to a position with a larger air output. For example, in the direction from the maximum air output to the minimum air output, the portion with a gradually changing bar spacing occupies 2 / 5 of the length, and the portion with a constant bar spacing corresponds to a portion with a smaller air output and occupies 3 / 5 of the length. Since the difference in the air output of this part is small, the difference can be ignored.

[0145] In the embodiment of the present disclosure, the diversion bar GT1 has a certain wind resistance. By setting a denser arrangement of diversion bars GT1 (that is, the bar interval GT2 is smaller) at a position where the air outlet speed is higher, and setting a sparser arrangement of diversion bars GT1 (that is, the bar interval GT2 is larger) at a position where the air outlet speed is lower, the air outlet speed and air volume of the first air outlet 2051 at different positions can be balanced, so that the air volume blown onto the display panel 202 and the cooling effect on the display panel 202 reach a balance, thereby reducing the temperature difference between the left and right sides of the display panel 202, and further making the heat dissipation effect of the display panel 202 more uniform.

[0146] For example, in some embodiments, the corner portion of the second cover CV2 corresponding to the first corner CN1 may also adopt the design of the bar grid array GT of the first corner CN1 in the above embodiment to further achieve the effect of uniform wind speed and air volume.

[0147] For example, in some embodiments, the first corner CN may also adopt other structures. For example, Figure 14 shows another cross-sectional schematic diagram of the optomechanical structure in Figure 3 along AA. As shown in Figure 14, in the embodiment of Figure 14, a diverter wall GW is provided at the first air outlet 2051. The cross-section of the diverter wall GW is a third arc shape. A first gap D1 is provided between the display panel 202 and the thermal insulation component 206. The diverter wall GW has a first end GW1 and a second end GW2 relative to each other. The first end GW1 points to the first gap D1, and the second end GW2 points to the first air outlet 2051.

[0148] For example, the first end GW1 of the diverter wall GW may be disposed in the same manner as the protrusion AR3 in the above-described embodiment, that is, the first end GW1 of the diverter wall GW is directed closer to the display panel 202 relative to the thermal insulation member 206. For example, FIG15 shows an enlarged schematic diagram of the first corner CN in FIG14 . As shown in FIG15 , the distance between the surface of the first end GW1 of the diverter wall GW near the thermal insulation member 206 and the plane where the surface of the thermal insulation member 206 near the display panel 202 lies is S31, and the distance between the surface of the first end GW1 of the diverter wall GW near the display panel 202 and the plane where the surface of the display panel 202 near the thermal insulation member 206 lies is S41, where S31>S41.

[0149] As a result, the first end GW1 of the diverter wall GW points closer to the display panel 202, so that the second wind 2 with a larger air volume is guided by the guide inner wall CN1 of the first corner CN, and has a higher wind speed on both sides of the display panel 202, thereby taking away more heat emitted by the display panel 202 and increasing the wind circulation rate.

[0150] In the embodiment of FIG15 , the air blown out from the first air outlet 2051 can be divided into two streams. The first stream 1 is directed through the guide inner wall CN1 of the first corner CN to the first channel 11 between the first mirror 201 and the thermal insulation member 206, and the second channel 12 between the thermal insulation member 206 and the display panel 202. The second stream 2 is directed through the diverter wall GW to the third channel 13 between the display panel 202 and the second mirror 203, and the second channel 12 between the thermal insulation member 206 and the display panel 202. Thus, effective heat dissipation of the display assembly 200 is achieved through three air guide channels.

[0151] For example, in some embodiments, S41 = (0.4-0.6) S31, for example, S41 = 0.4 S31, S41 = 0.5 S31, or S41 = 0.6 S31. According to tests, when S41 = 0.5 S31, the heat dissipation effect of the display panel 202 is better.

[0152] For example, as shown in FIG15 , the vertical distance between the second end GW2 of the diverter wall GW and the plane where the first air inlet surface 205A is located is S3, and the vertical distance between the second end GW2 of the diverter wall GW and the plane where the second air inlet surface 205B is located is S4, where S3 is less than S4. For example, in some embodiments, S3 = (0.4-0.6) S4, such as S3 = 0.4S4, S3 = 0.5S4, or S3 = 0.6S4. Testing has shown that when S3 = 0.5S4, the heat dissipation effect of the display panel 202 is better.

[0153] For example, in an embodiment of the present disclosure, the strip grid array GT and the diverter wall GW can be set separately, that is, only the strip grid array GT is set at the first corner CN, or only the diverter wall GW is set, or the strip grid array GT and the diverter wall GW can also be set at the same time, that is, the first corner CN can be provided with the strip grid array GT and the diverter wall GW at the same time.

[0154] For example, FIG12 illustrates a case where both a grating array GT and a diverter wall GW are provided at the first corner CN. As shown in FIG12 , in this case, the grating array GT can be provided in the same manner as in the above-described embodiment, while the diverter wall GW can be provided slightly differently from the above-described embodiment. For example, the first end GW1 of the diverter wall GW can point toward the display panel 202, for example, connected to the first edge 2021 of the display panel 202, and the second end GW2 of the diverter wall GW can point toward the first air outlet 2051, for example, toward the center of the first air outlet 2051. Alternatively, the same arrangement as in the above-described embodiment can be employed, with the second end GW2 pointing closer to the first air inlet surface 205A. The embodiments of the present disclosure are not specifically limited to this.

[0155] For example, in other embodiments, the first end GW1 of the diverter wall GW may point toward the display panel 202, for example, connected to the first edge 2021 of the display panel 202, and the second end GW2 of the diverter wall GW may point toward the first air inlet surface 205A, for example, connected to the first air inlet surface 205A. In this case, the first corner CN may also be provided with both the grating array GT and the diverter wall GW. For example, this design may be used in conjunction with the technical solution of FIG. 18 that utilizes both the first fan 205 and the second fan 207.

[0156] For example, as shown in FIG13 , the inner drainage wall CN1 of the first corner CN is disposed along the first side 2021 of the display panel 202. Referring to FIG13 and FIG7 , the minimum length L2 of the inner drainage wall CN1 is greater than or equal to the length L1 of the first side 2021 of the display panel 202. Thus, the air blown out from the first air outlet 2051 can be fully blown to every corner of the display panel 202.

[0157] For example, Figure 16 shows another top view of the first corner and the first fan. In other embodiments, as shown in Figure 16, the drainage inner wall CN1 of the first corner CN is arranged along the first edge 2021 of the display panel 202, and the drainage inner wall CN1 gradually decreases on both sides of the length direction (X direction in the figure) in the direction away from the first fan 205, so that the minimum length L2 of the drainage inner wall CN1 is less than the length of the first edge 2021 of the display panel 202.

[0158] In an embodiment of the present disclosure, the minimum length L2 of the drainage inner wall CN1 is basically equal to the propagation width of the wind blown out from the first air outlet 2051. By setting the minimum length L2 of the drainage inner wall CN1 to be less than the length of the first side 2021 of the display panel 202, the wind blown out from the first air outlet 2051 is narrowed by the drainage inner wall CN1 and then blown toward the display panel 202. At this time, the wind flow rate can be increased and the wind can be blown more concentratedly toward the middle part of the display panel 202. Since the middle part of the display panel 202 is easier to accumulate heat than the edge part, by setting the length L2 of the drainage inner wall CN1 to be less than the length of the first side 2021 of the display panel 202, the blowing rate can be increased and the wind can be concentrated toward the middle part of the display panel 202 at the same time, thereby increasing the wind circulation rate and improving the heat dissipation effect.

[0159] For example, in the embodiment of Figure 16, the minimum length L2 of the drainage inner wall CN1 is located on the air outlet side of the drainage inner wall CN1. In other embodiments, the minimum length L2 of the drainage inner wall CN1 can also be at other positions of the drainage inner wall CN1, as long as the effect of wind narrowing can be achieved.

[0160] Through testing, setting the length L2 of the drainage inner wall CN1 to be less than the length of the first side 2021 of the display panel 202 can significantly improve the heat dissipation efficiency of the display panel 202 and reduce the peak temperature of the display panel 202 compared to setting the length L2 of the drainage inner wall CN1 to be greater than or equal to the length of the first side 2021 of the display panel 202.

[0161] For example, in some examples, the ratio of the length L2 of the drainage inner wall CN1 to the length L1 of the first side 2021 of the display panel 202 is 0.85-0.95, such as 0.85, 0.9, or 0.95. Testing has shown that when the ratio of the length L2 of the drainage inner wall CN1 to the length L1 of the first side 2021 of the display panel 202 is 0.9, the heat dissipation efficiency of the display panel 202 is better, and the peak temperature of the display panel 202 is lower.

[0162] For example, in other embodiments, the structure of the first fan 205 can also be designed to improve the heat dissipation effect of the display assembly 200. For example, Figure 17 shows a schematic structural diagram of a first fan. As shown in Figure 17, the first fan 205 includes a fan housing 250 and two symmetrically arranged fan blades located in the fan housing 250, such as a first fan blade 251 and a second fan blade 252. The two fan blades are configured so that the area with the largest air output is toward the center of the display panel 202. That is, the two fan blades are arranged so that the area with the largest air output is located in the center of the first air outlet 2051.

[0163] For example, as shown in FIG17 , the first fan blade 251 and the second fan blade 252 are symmetrical in structure. When driven to rotate, the first fan blade 251 and the second fan blade 252 rotate in opposite directions, and the area with the largest air output is located in the middle of the first air outlet 2051, that is, toward the middle of the display panel 202. This can further improve the heat dissipation effect of the middle portion of the display panel 202. Since the middle portion of the display panel 202 is more likely to accumulate heat than the edge portion, the above-mentioned design of the first fan 205 can better dissipate heat from the display panel 202.

[0164] For example, in other embodiments, as shown in FIG18 , the display assembly installation area 20 may further include a second fan 207, which is disposed on a side of the reflective mirror 204 near the second cover CV2. In this case, the reflective mirror 204 is sandwiched between the first fan 205 and the second fan 207, and the second fan 207 is disposed along a second side 2022 of the display panel 202 that is opposite to the first side 2021. For example, the first fan 205 and the second fan 207 have opposite structural arrangements, and in this case, the first fan 205 and the second fan 207 rotate in opposite directions.

[0165] For example, in the embodiment of FIG18 , the point where the first fan 205 has the largest air volume may correspond to the right side of the display panel 202, and the point where the second fan 207 has the largest air volume may correspond to the left side of the display panel 202. In other embodiments, the point where the first fan 205 has the largest air volume may correspond to the left side of the display panel 202, and the point where the second fan 207 has the largest air volume may correspond to the right side of the display panel 202.

[0166] Since the air output of the first fan 205 and the second fan 207 is not uniform, with a larger air volume on one side of the air outlet and a smaller air volume on the other side, the first fan 205 and the second fan 207 are respectively arranged on both sides of the display panel 202, and the first fan 205 and the second fan 207 are arranged to rotate in opposite directions, the air volumes of the first fan 205 and the second fan 207 are superimposed, so that the overall air output effect of the first fan 205 and the second fan 207 can be made more uniform, and the air volume and wind speed are increased compared to setting up one fan, thereby helping to further improve the heat dissipation effect of the display panel 202.

[0167] For example, in some embodiments, referring to FIG7 , the length L3 of the first air outlet 2051 of the first fan 205 is greater than or equal to the length L1 of the first side 2021 of the display panel 202. Thus, the air blown out from the first air outlet 2051 can fully reach every corner of the display panel 202.

[0168] For example, in other embodiments, as shown in FIG19 , a first drainage structure 2081 and a second drainage structure 2082 are respectively provided on both sides of the first air outlet 2051 in the longitudinal direction (i.e., the X direction in the figure), and the minimum distance L4 between the first drainage structure 2081 and the second drainage structure 2081 in the longitudinal direction is less than the length L1 of the first side 2021. The minimum distance L4 between the first drainage structure 2081 and the second drainage structure 2081 in the longitudinal direction is also the air outlet length allowed by the first drainage structure 2081 and the second drainage structure 2081. By setting this minimum distance L4 to be less than the length L1 of the first side 2021, the speed of the air blown out from the first air outlet 2051 can be increased and concentrated to the middle portion of the display panel 202, thereby improving the heat dissipation effect on the display panel 202 and reducing the peak temperature of the display panel 202.

[0169] For example, in some embodiments, referring to Figure 16, the two side walls of the drainage inner wall CN1 of the first corner CN in the length direction can be regarded as the above-mentioned first drainage structure 2081 and the second drainage structure 2081, and achieve the same technical effect as the first drainage structure 2081 and the second drainage structure 2081.

[0170] For example, in some embodiments, the ratio of the minimum distance L4 to the length of the first side 2021 is 0.85-0.95, such as 0.85, 0.9, or 0.95. Testing has shown that when the ratio of the minimum distance L4 to the length L1 of the first side 2021 of the display panel 202 is 0.9, the heat dissipation efficiency of the display panel 202 is better, and the peak temperature of the display panel 202 is lower.

[0171] For example, in some embodiments, referring to Figure 5, the first air outlet 2051 is respectively provided with a first sealing portion SL1 on both sides of the length direction (X direction in the figure) to seal the gap between the first air outlet 2051 and the first cover body CV1 to prevent the wind blown out from the first air outlet 2051 from flowing back from the first air outlet 2051 on both sides in the length direction to the gap between the first air outlet 2051 and the first cover body CV1. The returned wind is called invalid wind, which cannot achieve effective wind circulation and will not achieve heat dissipation effect. By providing the first sealing portion SL1 on both sides of the first air outlet 2051 in the length direction, the generation of invalid wind can be avoided.

[0172] For example, in some embodiments, the first sealing part SL1 can be made of an elastic sealing member such as rubber or foam that has a certain elasticity and sealing effect, so that while achieving sealing, it can also achieve an elastic connection between the first air outlet 2051 and the first cover body CV1, thereby avoiding the first fan 205 from generating noise and mechanical wear due to collision with the first cover body CV1 due to shaking, and improving the stability of the structure.

[0173] Through testing, after the first sealing portion SL1 is provided, the peak temperature of the display panel 202 is reduced by about 3 degrees Celsius compared to the case where the first sealing portion SL1 is not provided, thereby effectively reducing the peak temperature of the display panel 202 .

[0174] For example, in some embodiments, as shown in Figures 4 and 12, the light source assembly setting area 10 includes a third fan 209 located on the side of the light source 101 away from the display assembly 200 and a light source heat sink 210 located on opposite sides of the light guide portion 102, such as the light cup. Figure 20 shows an enlarged schematic diagram of the partial structure of the light source heat sink 210 and the third fan 209 in the dotted box area in Figure 12. As shown in Figure 20, a second elastic member F2 is arranged between the light source heat sink 210 and the surface of the third fan 209.

[0175] For example, in some embodiments, the light source heat sink 210 is connected to the surface of the third fan 209 via a second bolt CL4 , and the second bolt CL4 passes through the second elastic member F2 spaced between the light source heat sink 210 and the third fan 209 .

[0176] For example, in some embodiments, the second elastic member F2 can be made of rubber, foam, or other elastic material with a certain elasticity, which can prevent the third fan 209 from generating noise and mechanical wear due to collision (vibration) with the light source heat sink 210 due to shaking, and improve the stability of the structure.

[0177] For example, in some embodiments, the shock absorption effect of the second elastic member F2 can be adjusted by the distance that the second bolt CL4 is screwed into the light source heat sink 210. For example, the screw length of the second bolt CL4 = the distance that the second bolt CL4 is screwed into the light source heat sink 210 + the original size of the second elastic member F2 (i.e., the size in the relaxed / uncompressed state) × the compression coefficient of the second elastic member F2. During use, the compression coefficient of the second elastic member F2 can be no greater than 0.5 to ensure sufficient shock absorption. If the compression coefficient of the second elastic member F2 is too large, it will be equivalent to a rigid body and will not provide a shock absorption effect.

[0178] For example, FIG21 illustrates a schematic diagram of the three-dimensional structure of a light source heat sink. In some embodiments, as shown in FIG21 , the light source heat sink 210 includes a first heat sink portion 211 and a second heat sink portion 212. A second gap 213 is defined between the first heat sink portion 211 and the second heat sink portion 212. The first heat sink portion 211 and the second heat sink portion 212 are connected by a heat pipe 214 to achieve heat exchange. The second gap 213 forms a larger air channel, which can increase the air intake of the third fan 209 and improve the heat dissipation effect.

[0179] 21 , a metal plate 216, such as a copper plate, may be provided in the middle of the first heat dissipation portion 211. A light source coupling portion 215, such as a copper plate, is provided on the metal plate 216 to couple the light source 201. The metal plate 216 helps dissipate heat from the light source 201.

[0180] For example, in some embodiments, referring to Figures 2 and 4, the third fan 209 has a second air outlet surface 2091, and the second air outlet surface 2091 is rectangular, such as a square, as shown in Figure 21. The size of the second gap 213 in a direction perpendicular to the first air outlet surface 205A, that is, the distance between the first heat dissipation part 211 and the second heat dissipation part 212, is S5. Referring to Figure 4, the length of one side of the rectangle is S6, and S5=0.1S6.

[0181] For example, in some embodiments, the value of S5 can range from 10 mm to 12 mm, such as 10 mm, 11 mm, or 12 mm. For example, in one example, the second air outlet surface 2091 is square, and the length S6 of one side of the square is 120 mm. In this case, the distance S5 between the first heat dissipation portion 211 and the second heat dissipation portion 212 by the second gap 213 is 12 mm. For example, in another example, the second air outlet surface 2091 is square, and the length S6 of one side of the square is 100 mm. In this case, the distance S5 between the first heat dissipation portion 211 and the second heat dissipation portion 212 by the second gap 213 is 10 mm.

[0182] For example, in some embodiments, referring to FIG4 , the light guide 102 , such as the optical cup assembly, includes an optical cup 1021 and an optical cup housing 1022 . A heat sink 220 is attached to the outer surface of the optical cup housing 1022 . FIG22 illustrates a schematic diagram of the structure in which the heat sink 220 is attached to the outer surface of the optical cup. As shown in FIG20 , the heat sink 220 includes a base 221 configured to mate with the optical cup and a heat dissipation structure array 222 located on a side of the base 221 away from the optical cup. For example, during use, the heat sink 220 can be attached to the surface of the optical cup using thermally conductive tape.

[0183] Figures 23 to 25 show schematic structural diagrams of various heat sinks. As shown in Figure 23, in one example, the heat dissipation structure array 222 includes a plurality of heat dissipation bars 222A arranged at intervals, and the heat dissipation bars 222A are arranged with the same pitch (that is, the distance between the centers of adjacent heat dissipation bars 222A). For example, in some examples, the pitch of the heat dissipation bars 222A is 7mm-8mm, such as 7.2mm, 7.3mm, 7.5mm or 7.8mm, etc. For example, in some examples, when the number of heat dissipation bars 222A is 9 and the length is 23.5mm, the heat dissipation area that can be achieved by this design is approximately 5582mm2.

[0184] Alternatively, as shown in FIG24 , the heat dissipation structure array 222 includes heat dissipation columns 222B arranged in multiple rows and columns. For example, the heat dissipation columns 222B may be prism-shaped. This embodiment is equivalent to adding notches to the heat dissipation bars 222A of the embodiment of FIG23 , so as to form multiple prisms on each heat dissipation bar 222A. For example, the width of the notch may be approximately 3.0 mm. In this case, the heat dissipation area that can be achieved by this design is approximately 4909 mm. 2 .

[0185] For example, as shown in Figure 25, the heat dissipation structure array 222 includes heat dissipation columns 222B arranged in multiple rows and columns. The heat dissipation columns 222B are cylindrical. For example, the row direction can be the R1 direction in the figure, and the column direction can be the R2 direction in the figure. In other embodiments, the row direction and the column direction can also be interchangeable.

[0186] For example, as shown in FIG25 , the multiple rows and columns of heat dissipation columns 222B include the Nth row of heat dissipation columns and the N+1th row of heat dissipation columns. The heat dissipation columns in the Nth row and the heat dissipation columns in the N+1th row are staggered in the row direction, where N is a positive integer greater than or equal to 1. For example, N is a positive integer such as 1, 2, 3, 4, or 5. In this case, each two adjacent rows of heat dissipation columns are staggered in the row direction, that is, the first heat dissipation column in the Nth row of heat dissipation columns and the first heat dissipation column in the N+1th row of heat dissipation columns are not aligned in the column direction. For example, the first heat dissipation column in the N+1th row of heat dissipation columns corresponds to a position between the first and second heat dissipation columns in the Nth row of heat dissipation columns. For example, the heat dissipation columns in the Nth row and the heat dissipation columns in the N+2th row of heat dissipation columns are aligned in the row direction.

[0187] For example, the multiple rows and columns of heat sinks include the Mth column of heat sinks and the M+1th column of heat sinks, and the Mth column of heat sinks and the M+1th column of heat sinks are staggered in the column direction, where M is a positive integer greater than or equal to 1. For example, M is a positive integer such as 1, 2, 3, 4, or 5. In this case, each two adjacent columns of heat sinks are staggered in the column direction, that is, the first heat sink in the Mth row of heat sinks and the first heat sink in the M+1th row of heat sinks are not aligned in the column direction. For example, the first heat sink in the M+1th row of heat sinks corresponds to a position between the first and second heat sinks in the Mth row of heat sinks. For example, the Mth row of heat sinks and the M+2th row of heat sinks are aligned in the row direction.

[0188] For example, a pitch P1 between the heat dissipation columns in the Nth row and the heat dissipation columns in the N+1th row in the column direction is greater than a pitch P2 between the heat dissipation columns in the Mth column and the heat dissipation columns in the M+1th column in the row direction.

[0189] Therefore, when the wind blows into the heat dissipation structure array 222 along the row direction, since the pitch P1 between the heat dissipation columns in the Nth row and the heat dissipation columns in the N+1th row in the column direction is larger, the wind can be allowed to pass through the gaps between the heat dissipation columns in the Nth row and the heat dissipation columns in the N+1th row. When the wind blows into the heat dissipation structure array 222 along the column direction, since the pitch P2 between the heat dissipation columns in the Mth column and the heat dissipation columns in the M+1th column in the row direction is smaller, the wind resistance generated in the column direction and the wind resistance generated in the row direction are larger. Therefore, the heat dissipation structure array 222 can also play a certain role in guiding the flow, and the wind will be fully blown to the surface of each heat dissipation column of the heat dissipation structure array 222 and then leave to take away more heat.

[0190] For example, in some examples, the pitch P1 between the heat dissipation columns in the Nth row and the heat dissipation columns in the N+1th row in the column direction is 2.35 mm, the pitch P2 between the heat dissipation columns in the Mth column and the heat dissipation columns in the M+1th column in the row direction is 1 mm, the diameter of the cylinder is 3 mm, and the height is 6.6 mm. In this case, the heat dissipation area that can be achieved by this design is about 6765 mm 2 .

[0191] For example, in an embodiment of the present disclosure, the display panel 202 may be a liquid crystal display panel (LCD), or an electronic ink panel or other display panel with similar functions. The first cover CV1 and the second cover CV2 may be covers formed of metal materials such as cast aluminum or alloy materials to achieve better heat dissipation. For example, the inner surface and / or outer surface of the first cover CV1 and the second cover CV2 may be provided with a plurality of heat sinks or other heat dissipation structures to achieve better heat dissipation. The first housing CV3 may be made of an organic material, such as plastic, to have a lighter weight. The first fan 205, the second fan 207, and the third fan 209 may be various types of fans, such as centrifugal fans, and the embodiments of the present disclosure do not impose any specific restrictions on the structure of each fan. Heat dissipation structures such as the heat sink 220 and the light source heat sink 210 may be made of metal materials or alloy materials, such as copper or copper alloys, and the embodiments of the present disclosure do not impose any specific restrictions on the materials of each structure.

[0192] At least one embodiment of the present disclosure provides a projection device including the optical-mechanical structure provided in an embodiment of the present disclosure. The projection device can have better heat dissipation and display effects.

[0193] There are a few points to note:

[0194] (1) The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure. Other structures may refer to conventional designs.

[0195] (2) For the sake of clarity, the thicknesses of layers or regions in the drawings used to describe the embodiments of the present disclosure are exaggerated or reduced, i.e., these drawings are not drawn to scale. It is understood that when an element is referred to as being "on" or "under" another element, the element may be "directly" on or "under" the other element, or intervening elements may be present.

[0196] (3) In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to form new embodiments.

[0197] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. The protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. An optical-mechanical structure, comprising a light source component setting area and a display component setting area, and comprising a light source component located in the light source component setting area and a display component located in the display component setting area, in, The display assembly is located at the light emitting side of the light source assembly, and the display assembly includes a first mirror, a display panel, a second mirror and a reflector which are sequentially arranged in a direction away from the light source assembly. The display assembly setting area includes a first fan and a first cover and a second cover that are arranged opposite to each other. The display assembly is arranged between the first cover and the second cover. The first fan is arranged on a side of the reflector close to the first cover. The display panel includes a first side close to the first cover body, the first fan includes a first air outlet, and the length direction of the first air outlet is parallel to the extension direction of the first side. The first cover has a first corner facing the first air outlet, and the first corner is configured to guide the wind flowing out of the first air outlet toward the first side and flow along the surface of the display panel. The width of the first air outlet is A, the distance between the first filter and the second filter is B, B>A.

2. The optomechanical structure according to claim 1, wherein: B=αA, the value range of α is 1.10-1.

50.

3. The optomechanical structure according to claim 2, wherein: B=1.38A.

4. The optomechanical structure according to any one of claims 1 to 3, wherein: The length of the first air outlet is smaller than the length of the first side.

5. The optomechanical structure according to any one of claims 1 to 4, wherein: The cross section of the first corner is a shape in which a first arc shape and a second arc shape are spliced ​​together, and the second arc shape is closer to the first air outlet than the first arc shape.

6. The optomechanical structure according to claim 5, wherein: The curvature radius of the first arc is smaller than the curvature radius of the second arc.

7. The optomechanical structure according to claim 5, wherein: The curvature radius of the first arc is 3mm-4mm, and the curvature radius of the second arc is 10mm-75mm.

8. The optomechanical structure according to claim 5, wherein: The second arc includes a first arc segment connected to the first arc segment, a second arc segment close to the first air outlet, and an intermediate arc segment connecting the first arc segment and the second arc segment. The radius of curvature of the middle arc segment is smaller than the radius of curvature of the first arc segment and the radius of curvature of the second arc segment, and / or the radius of curvature of the first arc segment is larger than the radius of curvature of the second arc segment.

9. The optomechanical structure according to claim 5, wherein: The curvature radius of the first arc is a constant value, and the curvature radius of the second arc gradually decreases from an end close to the display component to an end close to the first air outlet and then gradually increases.

10. The optomechanical structure according to any one of claims 5 to 9, wherein: The second arc has a protruding portion protruding from the first arc, and a dimension of the protruding portion in a width direction of the first air outlet is smaller than a dimension in a direction perpendicular to the first air outlet; And / or, a size of the protrusion in a width direction of the first air outlet is 1 mm-2 mm; and / or a size of the protrusion in a direction perpendicular to the first air outlet is 1 mm-2 mm.

11. The optomechanical structure according to any one of claims 5 to 10, wherein: In the width direction of the first air outlet, the size of the first arc is 4mm-8mm, and the size of the second arc is 12mm-18mm; and / or, in the direction perpendicular to the first air outlet, the size of the first arc is 9mm-13mm, and the size of the second arc is 12mm-16mm.

12. The optomechanical structure according to any one of claims 5 to 11, wherein: In the width direction of the first air outlet, the size of the first corner is H1, the size of the first arc is (0.1-0.3)H1, and the size of the second arc is (0.7-0.9)H1; and / or, in the width direction of the first air outlet, the size of the first arc is (0.1-0.3)A, and the size of the second arc is (0.7-0.9)A.

13. The optomechanical structure according to claim 10, wherein: In the width direction of the first air outlet, the size of the first arc minus the size of the protrusion is equal to 0.2*A, and the size of the second arc is 0.8*A.

14. The optomechanical structure according to any one of claims 5 to 13, wherein: The included angle between the first arc and the second arc ranges from 80 degrees to 90 degrees.

15. The optomechanical structure according to claim 10, wherein: The display assembly further includes a heat insulating member located between the first mirror and the display panel, a first gap is defined between the display panel and the heat insulating member, and the protrusion points to the first gap.

16. The optomechanical structure according to claim 15, wherein: A vertical distance from a surface of the protrusion close to the display panel to a plane where the display panel is located is S1, and a vertical distance from a surface of the protrusion close to the heat insulating member to a plane where the heat insulating member is located is S2, and S1<S2.

17. The optomechanical structure according to claim 16, wherein: S1 = (0.2-0.4) S2.

18. The optomechanical structure according to any one of claims 1 to 17, wherein: The first corner has a drainage inner wall, the drainage inner wall is arranged along the first side of the display panel, and the minimum length of the drainage inner wall is greater than or equal to the length of the first side of the display panel.

19. The optomechanical structure according to any one of claims 1 to 18, wherein: The first corner has a drainage inner wall, the drainage inner wall is arranged along the first side of the display panel, and the minimum length of the drainage inner wall is less than the length of the first side of the display panel.

20. The optomechanical structure of claim 19, wherein: The ratio of the minimum length of the drainage inner wall to the length of the first side of the display panel is 0.85-0.

95.

21. The optomechanical structure according to any one of claims 1 to 20, wherein: The first air outlet is provided with a first drainage structure and a second drainage structure on both sides of the length direction, respectively. The minimum distance between the first drainage structure and the second drainage structure in the length direction is less than the length of the first side.

22. The optomechanical structure of claim 21, wherein: The ratio of the minimum distance to the length of the first side is 0.85-0.

95.

23. The optomechanical structure according to any one of claims 1 to 22, wherein: The first fan has a first air inlet surface facing the reflector and a second air inlet surface away from the reflector, the first air inlet surface includes a first air inlet, and the second air inlet surface includes a second air inlet.

24. The optomechanical structure of claim 23, wherein: The distance between the second air inlet surface and the first cover body is in the range of 1.5 mm to 2.5 mm.

25. The optomechanical structure according to claim 23 or 24, wherein: The ratio of the area of ​​the first air inlet to the area of ​​the second air inlet is (2-4):

1.

26. The optomechanical structure according to any one of claims 23 to 25, wherein: The first air inlet includes a main air inlet, and the second air inlet includes a plurality of auxiliary air inlets, wherein the plurality of auxiliary air inlets are arranged around a center. The orthographic projections of the plurality of auxiliary air inlets on the first air inlet surface are located inside the main air inlet.

27. The optomechanical structure of claim 26, wherein: The multiple auxiliary air inlets are in the shape of a sector, a circle or a polygon.

28. The optomechanical structure according to claim 26 or 27, wherein: The display assembly setting area further includes a first shell, the first shell includes a first sub-shell located between the reflector and the first air inlet surface, the first sub-shell includes a shell opening exposing the main air inlet, The area of ​​the shell opening is larger than the area of ​​the main air inlet so as to expose the main air inlet.

29. The optomechanical structure of claim 28, wherein: The diameter of the shell opening is 1.0 mm-2.0 mm larger than the diameter of the main air inlet.

30. The optomechanical structure of claim 29, wherein: The shell opening includes a main opening and a plurality of secondary openings surrounding the main opening. The area of ​​the main opening is larger than the area of ​​the main air inlet so as to expose the main air inlet.

31. The optomechanical structure of claim 30, wherein: The diameter of each of the plurality of secondary openings is 7 mm to 9 mm.

32. The optomechanical structure according to any one of claims 28 to 31, wherein: The first housing further comprises a second sub-housing connected between the first cover body and the second cover body, A side of the second sub-shell close to the first cover body has a first connecting portion, the first cover body has a second connecting portion, and the first connecting portion and the second connecting portion are elastically connected.

33. The optomechanical structure of claim 32, wherein: The first connection part and the second connection part are connected by a first bolt, wherein the first bolt includes a threaded rod and a top portion located on one side of the threaded rod. A first elastic member is provided between the top and the first connecting portion, and / or between the top and the second connecting portion, and / or between the first connecting portion and the second connecting portion.

34. The optomechanical structure according to any one of claims 1 to 33, wherein: The first air outlet is provided with first sealing parts on both sides in the length direction to seal the gap between the first air outlet and the first cover body.

35. The optomechanical structure according to any one of claims 1 to 4, wherein: The first corner has a drainage inner wall, the drainage inner wall is provided with a bar grid array, the bar grid array includes a plurality of drainage bar grids extending in a direction perpendicular to the first side and arranged in the direction of the first side, there are bar grid intervals between adjacent drainage bar grids, and the sizes of the plurality of bar grid intervals between the plurality of drainage bar grids are different, The first air outlet has a first air outlet and a second air outlet at different positions, the air outlet speed at the first air outlet is greater than the air outlet speed at the second air outlet, and the bar grille spacing corresponding to the first air outlet is smaller than the bar grille spacing corresponding to the second air outlet.

36. The optomechanical structure according to any one of claims 1 to 35, wherein: The first fan includes a fan housing and two symmetrically arranged fan blades located in the fan housing, and the two fan blades are configured so that a portion with a larger air output is directed toward the middle of the display panel.

37. The optomechanical structure according to any one of claims 1 to 36, wherein: The display component setting area also includes a second fan, which is arranged on a side of the reflector close to the second cover body, and the first fan and the second fan rotate in opposite directions.

38. The optomechanical structure of claim 35, wherein: In a direction from the first air outlet to the second air outlet, the intervals between adjacent guide bars gradually increase.

39. The optomechanical structure according to any one of claims 1 to 4 and 35 to 38, wherein: A splitter wall is provided at the first air outlet, and the cross section of the splitter wall is a third arc shape. The display assembly further includes a heat insulating member located between the first mirror and the display panel, and a first gap is formed between the display panel and the heat insulating member. The flow dividing wall has a first end and a second end opposite to each other, the first end points to the first gap, and the second end points to the first air outlet.

40. The optomechanical structure of claim 39, wherein: The vertical distance from the second end to the plane where the first air inlet surface is located is S3, and the vertical distance from the second end of the splitter wall to the plane where the second air inlet surface is located is S4. S3 is smaller than S4.

41. The optomechanical structure of claim 40, wherein: S3 = (0.4-0.6) S4.

42. The optomechanical structure according to any one of claims 1 to 41, wherein: The light source assembly includes a light source and a light cup located on the light emitting side of the light source. The light source assembly setting area includes a third fan located on a side of the light source away from the display assembly and light source heat sinks located on opposite sides of the light cup. A second elastic member is arranged between the light source heat sink and the surface of the third fan.

43. The optomechanical structure of claim 42, wherein: The light source heat sink comprises a first heat sink and a second heat sink, a second gap is provided between the first heat sink and the second heat sink, and the first heat sink and the second heat sink are connected via a heat pipe.

44. The optomechanical structure of claim 42, wherein: The third fan has a second air outlet surface, the second air outlet surface is rectangular, the size of the second gap in a direction perpendicular to the first air outlet surface is S5, the length of one side of the rectangle is S6, and S5=0.1S6.

45. The optomechanical structure of claim 44, wherein: The value range of S5 is 10mm-12mm.

46. ​​The optomechanical structure according to any one of claims 1 to 45, wherein: The light source assembly includes a light source and a light cup assembly located at the light emitting side of the light source, the light cup assembly includes a light cup and a light cup shell, and a heat sink is attached to the outer surface of the light cup shell. The heat sink comprises a base configured to fit with the optical cup and a heat dissipation structure array located on a side of the base away from the optical cup. The heat dissipation structure array includes heat dissipation columns arranged in multiple rows and columns, or The heat dissipation structure array includes a plurality of heat dissipation bars arranged at intervals.

47. The optomechanical structure of claim 46, wherein: The heat dissipation structure array includes heat dissipation columns arranged in multiple rows and columns, and the heat dissipation columns are cylindrical. The multiple rows and columns of heat dissipation columns include heat dissipation columns in the Nth row and heat dissipation columns in the N+1th row. The heat dissipation columns in the Nth row and the heat dissipation columns in the N+1th row are arranged in a staggered manner in a row direction, and N is a positive integer greater than or equal to 1.

48. The optomechanical structure of claim 47, wherein: The multiple rows and columns of heat dissipation columns include heat dissipation columns in the Mth column and heat dissipation columns in the M+1th column, the heat dissipation columns in the Mth column and the heat dissipation columns in the M+1th column are arranged staggered in the column direction, and M is a positive integer greater than or equal to 1; The pitch between the Nth row of heat dissipation columns and the N+1th row of heat dissipation columns in the column direction is P1, and the pitch between the Mth column of heat dissipation columns and the M+1th column of heat dissipation columns in the row direction is P2. P1>P2.

49. A projection device, comprising the optomechanical structure according to any one of claims 1-48.

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