Optical machine structure and projection device

Abstract

An optical-mechanical structure and a projection device relate to the technical field of display. The optical-mechanical structure comprises a mounting frame, a display panel and at least one light-transmitting element, the light-transmitting element is arranged on the display side and / or the non-display side of the display panel, the display panel and the light-transmitting element are arranged on the inner peripheral side of the mounting frame at intervals in the first direction, and the display panel comprises a display surface; wherein the display panel, the mounting frame body and the at least one light-transmitting element define at least one cavity, the cavity is filled with cooling liquid, a liquid cooling pipeline and a plurality of connecting channels are arranged on the mounting frame body, the connecting channels are communicated between the liquid cooling pipeline and the cavity, and in orthographic projection on the display surface, the liquid cooling pipeline is communicated with the cavity. All the connecting channels communicated with the same cavity are located on the same side of the display panel.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, and in particular, to a light engine structure and a projection device. BACKGROUND

[0002] In order to pursue higher brightness, the light engine structure in the projector usually uses a high-power light source. The light emitted by the light source is irradiated onto the display panel. Part of the light is transmitted through the display panel, and the light that cannot be transmitted is absorbed by the display panel, causing the temperature of the display panel to rise. Therefore, the display panel needs to be cooled. However, the heat dissipation effect of the light engine structure in the related art is poor. SUMMARY

[0003] The present disclosure provides a light engine structure, comprising: a mounting frame, a display panel, and at least one light-transmitting element, the light-transmitting element is arranged on the display side and / or the non-display side of the display panel, the display panel and the light-transmitting element are arranged on the inner circumferential side of the mounting frame along a first direction, and the display panel comprises a display surface.

[0004] The display panel, the mounting frame, and the at least one light-transmitting element form at least one cavity, the cavity is filled with cooling liquid, the mounting frame is provided with a liquid cooling pipeline and a plurality of connecting channels, the connecting channels are communicated between the liquid cooling pipeline and the cavity, and in the orthographic projection on the display surface, all the connecting channels communicated with the same cavity are located on the same side of the display panel.

[0005] In some embodiments, a spacing space is arranged between the connecting channel and the display panel, and the spacing space serves as a flow space of the cooling liquid between the liquid cooling pipeline and the cavity.

[0006] In some embodiments, the at least one light-transmitting element comprises a first light-transmitting element and a second light-transmitting element, the first light-transmitting element is located on the display side of the display panel, and the second light-transmitting element is located on the non-display side of the display panel.

[0007] The at least one cavity comprises a first cavity and a second cavity, the first cavity is formed by the display panel, the first light-transmitting element, and the mounting frame, the second cavity is formed by the display panel, the second light-transmitting element, and the mounting frame, the connecting channel communicated with the first cavity is a first connecting channel, and the connecting channel communicated with the second cavity is a second connecting channel.

[0008] In some embodiments, in the orthographic projection on the display surface, the first connecting channel and the second connecting channel are located on the same side of the display panel.

[0009] In some embodiments, the liquid cooling pipe comprises:

[0010] a first sub-liquid cooling pipe, the first sub-liquid cooling pipe is located at one side of the display panel, the first sub-liquid cooling pipe is in communication with the first cavity through the first connecting channel, and the first sub-liquid cooling pipe is in communication with the second cavity through the second connecting channel, and the first connecting channel and the second connecting channel are arranged separately.

[0011] In some embodiments, a plurality of the first connecting channels and a plurality of the second connecting channels are arranged symmetrically about a first axis, and the first axis is parallel to the extension direction of the first sub-liquid cooling pipe.

[0012] In some embodiments, the display panel is connected with a driving circuit board, and the driving circuit board is used to drive the display panel to display.

[0013] In the orthographic projection on the display surface, the first sub-liquid cooling pipe and the driving circuit board are located at different sides of the display panel.

[0014] In some embodiments, in the orthographic projection on the display surface, the first connecting channel and the second connecting channel are located at different sides of the display panel.

[0015] In some embodiments, in the orthographic projection on the display surface, the first connecting channel and the second connecting channel are located at opposite sides of the display panel.

[0016] The liquid cooling pipe comprises a second sub-liquid cooling pipe and a third sub-liquid cooling pipe, the second sub-liquid cooling pipe and the third sub-liquid cooling pipe are located at opposite sides of the display panel, the second sub-liquid cooling pipe is in communication with the first cavity through the first connecting channel, and the third sub-liquid cooling pipe is in communication with the second cavity through the second connecting channel.

[0017] In some embodiments, the second sub-liquid cooling pipe and the third sub-liquid cooling pipe are not in communication with each other.

[0018] In some embodiments, the liquid cooling pipe further comprises:

[0019] a fourth sub-liquid cooling pipe, the fourth sub-liquid cooling pipe is located between the second sub-liquid cooling pipe and the third sub-liquid cooling pipe, the fourth sub-liquid cooling pipe is located at different sides of the display panel from the second sub-liquid cooling pipe and the third sub-liquid cooling pipe respectively, and the second sub-liquid cooling pipe and the third sub-liquid cooling pipe are in communication through the fourth sub-liquid cooling pipe.

[0020] In some embodiments, in the orthographic projection on the display surface, the first connecting channel and the second connecting channel are located on two sides adjacent to the display panel.

[0021] The liquid cooling pipeline comprises a fifth sub-liquid cooling pipeline and a sixth sub-liquid cooling pipeline in communication with each other, the fifth sub-liquid cooling pipeline and the sixth sub-liquid cooling pipeline are located on two sides adjacent to the display panel, the fifth sub-liquid cooling pipeline communicates with the first cavity through the first connecting channel, and the sixth sub-liquid cooling pipeline communicates with the second cavity through the second connecting channel.

[0022] In some embodiments, the liquid cooling pipeline further comprises:

[0023] A seventh sub-liquid cooling pipeline, the seventh sub-liquid cooling pipeline and the fifth sub-liquid cooling pipeline are located on two sides adjacent to the display panel, and the seventh sub-liquid cooling pipeline and the fifth sub-liquid cooling pipeline communicate at ends away from the sixth sub-liquid cooling pipeline; or

[0024] The seventh sub-liquid cooling pipeline and the sixth sub-liquid cooling pipeline are located on two sides adjacent to the display panel, and the seventh sub-liquid cooling pipeline and the sixth sub-liquid cooling pipeline communicate at ends away from the fifth sub-liquid cooling pipeline.

[0025] In some embodiments, a plurality of connecting channels communicating with the same cavity are arranged in one or more rows, the plurality of connecting channels in each row are arranged along a second direction, the second direction is the extension direction of the liquid cooling pipeline connected with the connecting channel, and the plurality of rows are arranged along the first direction.

[0026] In some embodiments, the orthographic projection shape of the liquid cooling pipeline on the display surface comprises at least one of the following shapes: a straight line, an L shape or a U shape.

[0027] In some embodiments, the liquid cooling pipeline comprises at least one sub-liquid cooling pipeline, and different sub-liquid cooling pipelines are located on different sides of the display panel.

[0028] The display surface is a polygon, and the extension direction of the sub-liquid cooling pipeline is parallel to the adjacent polygon side.

[0029] In some embodiments, the caliber of the connecting channel along the second direction is greater than or equal to the caliber along the first direction, and the second direction is the extension direction of the liquid cooling pipeline connected with the connecting channel.

[0030] In some embodiments, the distance between the connecting channel and the display panel is greater than or equal to 10 times the caliber of the connecting channel.

[0031] In some embodiments, the thickness of the cavity in the first direction is greater than or equal to 1 mm and less than or equal to 5 mm than the caliber of the connecting channel communicating with the cavity in the first direction.

[0032] In some embodiments, the caliber of the connecting channel is greater than or equal to 1 mm and less than or equal to 3 mm.

[0033] In some embodiments, the flow rate of the cooling liquid in the liquid cooling pipeline is less than or equal to 3 L / min.

[0034] The present disclosure provides a projection device comprising the optical-mechanical structure as claimed in any one of the preceding claims.

[0035] In some embodiments, the projection device further comprises:

[0036] a circulating pump and a heat sink, the outlet of the heat sink is connected with the inlet of the liquid cooling pipeline, the outlet of the liquid cooling pipeline is connected with the inlet of the circulating pump, and the outlet of the circulating pump is connected with the inlet of the heat sink.

[0037] The above description is only a summary of the technical solutions of the present disclosure. In order to enable one skilled in the art to better understand the technical means of the present disclosure, the contents of the specification can be implemented, and in order to enable the above and other purposes, features and advantages of the present disclosure to be more obvious and easy to understand, the specific embodiments of the present disclosure are described below. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the related art, the drawings needed to be used in the embodiments or related art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present disclosure, and those skilled in the art can also obtain other drawings according to these drawings without creative labor. It should be noted that the proportions in the drawings are only for illustration and do not represent the actual proportions.

[0039] Figure 1 A structural schematic diagram of an optical-mechanical structure in the related art is shown;

[0040] Figure 2 A display effect schematic diagram of an optical-mechanical structure in the related art is shown;

[0041] Figure 3 An assembly structure schematic diagram and an explosion structure schematic diagram of an optical-mechanical structure provided by the present disclosure are shown;

[0042] Figure 4 A structural schematic diagram of a first optical-mechanical structure example provided by the present disclosure is shown;

[0043] Figure 5 A fluid simulation diagram of a first optical-mechanical structure example provided by the present disclosure is shown;

[0044] Figure 6 A structural schematic diagram of a mounting frame in the first optical-mechanical structure example provided by the present disclosure is shown;

[0045] Figure 7 A structural schematic diagram of a second optical-mechanical structure example provided by the present disclosure is shown;

[0046] Figure 8 A structural schematic diagram of an external connection structure of two sub-liquid cooling pipes in the second optical-mechanical structure example provided by the present disclosure is shown;

[0047] Figure 9 A structural schematic diagram of a third optical-mechanical structure example provided by the present disclosure is shown;

[0048] Figure 10 A structural schematic diagram of a fourth optical-mechanical structure example provided by the present disclosure is shown;

[0049] Figure 11 A structural schematic diagram of two liquid cooling pipes is exemplarily shown;

[0050] Figure 12 A structural schematic diagram of a first connection channel and a second connection channel on a first sub-liquid cooling pipe is exemplarily shown;

[0051] Figure 13 A structural schematic diagram of a fifth optical-mechanical structure example provided by the present disclosure is shown;

[0052] Figure 14 A structural schematic diagram of a projection device provided by the present disclosure is exemplarily shown;

[0053] Figure 15 A structural schematic diagram of another projection device provided by the present disclosure is exemplarily shown;

[0054] Figure 16 A structural schematic diagram of still another projection device provided by the present disclosure is exemplarily shown. DETAILED DESCRIPTION

[0055] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are some but not all of the embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present disclosure.

[0056] Traditional optical machine structures mainly use air cooling, also known as fan cooling, to dissipate heat. Air cooling uses a fan to carry away the heat absorbed by the heat sink in the optical machine. Air cooling has the advantages of low cost and simple structure, but it is highly dependent on the environment.

[0057] Liquid cooling uses liquid to forcibly circulate the liquid to carry away the heat of the heat sink under the drive of the pump. Liquid cooling is equivalent to installing a small air conditioner in the optical machine structure. Compared with air cooling, liquid cooling has the advantages of quietness, stable cooling, and less dependence on the environment. Because liquid has a larger density and specific heat capacity than gas, liquid cooling has higher heat dissipation performance and is commonly used in high-power scenarios such as server cooling, automotive lithium battery cooling, and laser cooling.

[0058] Reference Figure 1 A cross-sectional schematic diagram of an optical machine structure in the related art is shown. As shown in Figure 1 The specific structure of the optical machine structure is as follows: a first light-transmitting element 200 and a second light-transmitting element 400 are respectively arranged on both sides of an LCD screen 300. The first light-transmitting element 200, the LCD screen 300, and the second light-transmitting element 400 are arranged at intervals along a first direction F1 on the inner circumferential side of a mounting frame 100. The first light-transmitting element 200, the LCD screen 300, and the mounting frame 100 enclose a first cavity A. The LCD screen 300, the second light-transmitting element 400, and the mounting frame 100 enclose a second cavity B. The mounting frame 100 is provided with a first liquid cooling channel C1 communicating with the first cavity A, a second liquid cooling channel C2 communicating with the second cavity B, and a third liquid cooling channel C3 communicating with the first cavity A and the second cavity B, respectively. At least one of the first liquid cooling channel C1, the second liquid cooling channel C2, and the third liquid cooling channel C3 is configured in a liquid inlet state, and at least one of the first liquid cooling channel C1, the second liquid cooling channel C2, and the third liquid cooling channel C3 is configured in a liquid outlet state. Figure 1 The optical machine structure shown in

[0059] However, Figure 1 The optical machine structure shown in Figure 2The inventor analyzed and found that the reason for generating the "water lines" is that the first liquid cooling channel C1 and the third liquid cooling channel C3 are arranged on opposite sides of the first cavity A, and the second liquid cooling channel C2 and the third liquid cooling channel C3 are arranged on opposite sides of the second cavity B, so that the liquid in the first cavity A generates convection during the process of flowing from the first liquid cooling channel C1 to the third liquid cooling channel C3 (or flowing from the third liquid cooling channel C3 to the first liquid cooling channel C1), and the liquid in the second cavity B generates convection during the process of flowing from the third liquid cooling channel C3 to the second liquid cooling channel C2 (or flowing from the second liquid cooling channel C2 to the third liquid cooling channel C3). The reason for the convection is that the density of hot water and cold water is different, and the different density will cause the refractive index to be different, and the light is refracted at the interface of the hot water and the cold water, thereby generating the convection "water lines", that is, the convection lines.

[0060] To solve the above problems, the present disclosure provides an optical mechanical structure, as shown in Figure 3 The optical mechanical structure comprises a mounting frame 100, a display panel 200, and at least one light-transmitting element 300, the light-transmitting element 300 is arranged on the display side and / or the non-display side of the display panel 200, the display panel 200 and the light-transmitting element 300 are arranged on the inner circumferential side of the mounting frame 100 along a first direction f1, and the display panel 200 comprises a display surface for displaying a picture.

[0061] As shown in Figure 4 , Figure 7 , Figure 9 or Figure 10 The display panel 200, the mounting frame 100, and the at least one light-transmitting element 300 form at least one cavity Q, the cavity Q is filled with cooling liquid, the mounting frame 100 is provided with a liquid cooling pipeline C and a plurality of connecting channels T, the connecting channels T are communicated between the liquid cooling pipeline C and the cavity Q, and in the orthographic projection on the display surface, all the connecting channels T communicated with the same cavity Q are located on the same side of the display panel 200.

[0062] Exemplarily, the liquid cooling pipeline C is arranged in the mounting frame 100, the liquid cooling pipeline C is located on at least one side of the periphery of the display panel 200, and the liquid cooling pipeline C can be integrally injection molded with the mounting frame 100.

[0063] Exemplarily, the connecting channel T is arranged on the pipe wall of the liquid cooling pipeline C facing the cavity Q, the connecting channel T penetrates the pipe wall of the liquid cooling pipeline C facing the cavity Q, and the cooling liquid in the liquid cooling pipeline C and the cooling liquid in the cavity Q are exchanged through the connecting channel T.

[0064] Referring to Figure 5 The fluid simulation diagram of the optical mechanical structure provided by the present disclosure is shown, Figure 5The arrow in the figure indicates the direction of the flow of the cooling liquid, and the heat dissipation principle is as follows: after the light machine starts to work and generates heat, the liquid in the cavity Q absorbs the heat of the display panel 200 and becomes hot, the cooling liquid in the liquid cooling pipe C is filled into the liquid cooling pipe C under the action of the external circulating pump PU (not shown in the figure) Figure 5 , the cooling liquid in the liquid cooling pipe C enters the cavity Q through the connecting channel T, under the fluid force of the cooling liquid in the liquid cooling pipe C, the cooling liquid in the cavity Q flows back to the liquid cooling pipe C through the connecting channel T, and finally flows out from the liquid outlet of the liquid cooling pipe C, so as to realize the heat exchange of the liquid. The liquid flow can quickly take away the heat on the display panel 200, so as to reduce the temperature of the display panel 200 and improve the service life of the light machine.

[0065] Since all the connecting channels T communicating with the same cavity Q are located on the same side (such as the lower side as shown in Figure 5 , the fluctuation area of the cooling liquid (such as the area in the dashed box in Figure 5 ) is mainly located near the connecting channel T, by reasonably setting the distance between the display panel 200 and the connecting channel T as a heat exchange space, it can be ensured that the fluctuation area of the cooling liquid is located outside the display area, so as to weaken or eliminate the flow lines, improve the display effect, and improve the power consumption and brightness of the whole machine.

[0066] Exemplarily, a spacing space is arranged between the connecting channel T and the display panel 200, which is used as a flow space or heat exchange space of the cooling liquid between the liquid cooling pipe C and the cavity Q. In the spacing space, the cooling liquid with a higher temperature in the cavity Q and the cooling liquid with a lower temperature in the liquid cooling pipe C flow or convect each other, so as to realize heat exchange.

[0067] In specific implementation, the size of the spacing space can be determined according to the fluctuation range of the cooling liquid near the connecting channel. The size of the spacing space is related to the caliber size of the connecting channel T and the flow size of the cooling liquid in the liquid cooling pipe C and other factors. When the caliber of the connecting channel T and the flow of the cooling liquid in the liquid cooling pipe C are small, the flow lines are not obvious, and a smaller spacing space can be arranged. When the caliber of the connecting channel T and the flow of the cooling liquid in the liquid cooling pipe C are large, the flow lines are more obvious, and a larger spacing space needs to be arranged.

[0068] Exemplarily, as shown in Figure 3 , the at least one light-transmitting element 300 includes a first light-transmitting element 301 and a second light-transmitting element 302, the first light-transmitting element 301 is located on the display side of the display panel 200, and the second light-transmitting element 302 is located on the non-display side of the display panel 200.

[0069] Exemplarily, as shown in Figure 3As shown, the mounting frame 100 has the same shape as the display panel 200, the first light-transmitting element 301, and the second light-transmitting element 302, for example, all of which are rectangular. The display panel 200, the first light-transmitting element 301, and the second light-transmitting element 302 are snapped and fixed in the mounting frame 100, with the display panel 200 located between the first light-transmitting element 301 and the second light-transmitting element 302.

[0070] For example, such as Figure 4 , Figure 7 , Figure 9 or Figure 10 As shown, at least one cavity Q includes a first cavity Q1 and a second cavity Q2. The first cavity Q1 is formed by a display panel 200, a first light-transmitting element 301, and a mounting frame 100. The second cavity Q2 is formed by a display panel 200, a second light-transmitting element 302, and a mounting frame 100. The connection channel T communicating with the first cavity Q1 is the first connection channel T1, and the connection channel T communicating with the second cavity Q2 is the second connection channel T2.

[0071] For example, such as Figure 4 , Figure 7 , Figure 9 or Figure 10 As shown, the display panel 200, the first light-transmitting element 301, and the mounting frame 100 together form a first cavity Q1, and the display panel 200, the second light-transmitting element 302, and the mounting frame 100 together form a second cavity Q2. The first cavity Q1 and the second cavity Q2 are not connected and are independent of each other. Both the first cavity Q1 and the second cavity Q2 are filled with coolant, which includes, but is not limited to, fluorinated liquid.

[0072] like Figure 4 , Figure 7 , Figure 9 or Figure 10 As shown, for each cavity Q, the orthographic projection of all the connection channels T connected to that cavity Q onto the display surface is located on the same side of the display panel 200.

[0073] For example, the orthographic projections of all the first connection channels T1 connected to the first cavity Q1 on the display surface are located on the same side of the display panel 200, and the orthographic projections of all the second connection channels T2 connected to the second cavity Q2 on the display surface are located on the same side of the display panel 200.

[0074] exist Figure 4 , Figure 7 , Figure 9 and Figure 10 Figure a shows the orthographic projection of the optomechanical structure onto the display surface; Figure b shows the cross-sectional view of the optomechanical structure along position AA'; and Figure c shows the cross-sectional view of the optomechanical structure along position BB'. The unidirectional dashed arrows indicate the direction of liquid flow.

[0075] As shown in a of FIG. 20, in the orthographic projection on the display surface, all the first connecting channels T1 communicating with the first cavity Q1 are located on the lower side of the display panel 200, and all the second connecting channels T2 communicating with the second cavity Q2 are located on the lower side of the display panel 200. Figure 4 As shown in a of FIG. 20, in the orthographic projection on the display surface, all the first connecting channels T1 communicating with the first cavity Q1 are located on the lower side of the display panel 200, and all the second connecting channels T2 communicating with the second cavity Q2 are located on the lower side of the display panel 200.

[0076] Figure 7 As shown in a of FIG. 20, in the orthographic projection on the display surface, all the first connecting channels T1 communicating with the first cavity Q1 are located on the lower side of the display panel 200, and all the second connecting channels T2 communicating with the second cavity Q2 are located on the lower side of the display panel 200.

[0077] As shown in a of FIG. 20, in the orthographic projection on the display surface, all the first connecting channels T1 communicating with the first cavity Q1 are located on the lower side of the display panel 200, and all the second connecting channels T2 communicating with the second cavity Q2 are located on the lower side of the display panel 200. Figure 9 As shown in a of FIG. 20, in the orthographic projection on the display surface, all the first connecting channels T1 communicating with the first cavity Q1 are located on the lower side of the display panel 200, and all the second connecting channels T2 communicating with the second cavity Q2 are located on the lower side of the display panel 200.

[0078] Figure 10 As shown in a of FIG. 20, in the orthographic projection on the display surface, all the first connecting channels T1 communicating with the first cavity Q1 are located on the lower side of the display panel 200, and all the second connecting channels T2 communicating with the second cavity Q2 are located on the lower side of the display panel 200.

[0079] As shown in a of FIG. 20, in the orthographic projection on the display surface, all the first connecting channels T1 communicating with the first cavity Q1 are located on the lower side of the display panel 200, and all the second connecting channels T2 communicating with the second cavity Q2 are located on the lower side of the display panel 200. Figure 4 Figure 7 Figure 9 or Figure 10 As shown in a of FIG. 20, in the orthographic projection on the display surface, all the first connecting channels T1 communicating with the first cavity Q1 are located on the lower side of the display panel 200, and all the second connecting channels T2 communicating with the second cavity Q2 are located on the lower side of the display panel 200.

[0080] For example, there are multiple first connecting channels T1 communicating the liquid cooling pipeline C and the first cavity Q1, and the cooling liquid in the liquid cooling pipeline C flows into the first cavity Q1 through a part of the first connecting channels T1, and the cooling liquid in the first cavity Q1 flows into the liquid cooling pipeline C through another part of the first connecting channels T1. There are multiple second connecting channels T2 communicating the liquid cooling pipeline C and the second cavity Q2, and the cooling liquid in the liquid cooling pipeline C flows into the second cavity Q2 through a part of the second connecting channels T2, and the cooling liquid in the second cavity Q2 flows into the liquid cooling pipeline C through another part of the second connecting channels T2.

[0081] Exemplarily, the orthographic projection shape of the liquid cooling pipeline C on the display surface includes at least one of the following shapes: straight line shape, L shape or U shape.

[0082] Exemplarily, as shown in a of FIG. 20, in the orthographic projection on the display surface, all the first connecting channels T1 communicating with the first cavity Q1 are located on the lower side of the display panel 200, and all the second connecting channels T2 communicating with the second cavity Q2 are located on the lower side of the display panel 200. Figure 4 ​​​​As shown in FIG. 1, the normal projection of the liquid cooling pipe C on the display surface is located on one side of the display panel 200, and the shape is linear.

[0083] As shown in FIG. 2, the normal projection of the liquid cooling pipe C on the display surface is located on two opposite sides of the display panel 200, and the shape is two parallel linear shapes. Figure 7

[0084] As shown in FIG. 3, the normal projection of the liquid cooling pipe C on the display surface is located on two adjacent sides of the display panel 200, and the shape is L-shaped. Figure 9

[0085] As shown in FIG. 4, the normal projection of the liquid cooling pipe C on the display surface is located on three adjacent sides of the display panel 200, and the shape is U-shaped. Figure 10

[0086] It should be noted that the normal projection of the liquid cooling pipe C on the display surface can also be located on four adjacent sides of the display panel 200, as long as the liquid inlet and the liquid outlet of the liquid cooling pipe C can be connected with the external circulating pump PU and the heat sink SR.

[0087] Exemplarily, as shown in FIG. 5, FIG. 6, FIG. 7 or FIG. 8, the liquid cooling pipe C includes at least one sub-liquid cooling pipe C1, and different sub-liquid cooling pipes C1 are located on different sides of the display panel 200. It can be understood that the more the number of sub-liquid cooling pipes C1 included in the liquid cooling pipe C, the more uniform the temperature on the display panel 200. Figure 4 Figure 7 Figure 9 Figure 10 Exemplarily, as shown in FIG. 5, FIG. 6, FIG. 7 or FIG. 8, the display surface is a polygon, and the extension direction of the sub-liquid cooling pipe C1 is parallel to the side edge of the polygon adjacent to the sub-liquid cooling pipe C1.

[0088] As shown in FIG. 5, the liquid cooling pipe C includes one sub-liquid cooling pipe C1, which is located on the lower side of the display panel 200 and is parallel to the lower side edge of the display surface. Figure 4 Figure 7 As shown in FIG. 6, the liquid cooling pipe C includes two sub-liquid cooling pipes C1, which are respectively located on the upper side and the lower side of the display panel 200. The sub-liquid cooling pipe C1 located on the upper side of the display panel 200 is parallel to the upper side edge of the display surface, and the sub-liquid cooling pipe C1 located on the lower side of the display panel 200 is parallel to the lower side edge of the display surface. Figure 9 Figure 10 As shown in FIG. 7, the liquid cooling pipe C includes two sub-liquid cooling pipes C1, which are respectively located on the upper side and the lower side of the display panel 200. The sub-liquid cooling pipe C1 located on the upper side of the display panel 200 is parallel to the upper side edge of the display surface, and the sub-liquid cooling pipe C1 located on the lower side of the display panel 200 is parallel to the lower side edge of the display surface.

[0089] As shown in FIG. 8, the liquid cooling pipe C includes two sub-liquid cooling pipes C1, which are respectively located on the upper side and the lower side of the display panel 200. The sub-liquid cooling pipe C1 located on the upper side of the display panel 200 is parallel to the upper side edge of the display surface, and the sub-liquid cooling pipe C1 located on the lower side of the display panel 200 is parallel to the lower side edge of the display surface. Figure 4

[0090] Figure 7

[0091] As shown in FIG. 8, the liquid cooling pipe C includes two sub-liquid cooling pipes C1, which are respectively located on the upper side and the lower side of the display panel 200. The sub-liquid cooling pipe C1 located on the upper side of the display panel 200 is parallel to the upper side edge of the display surface, and the sub-liquid cooling pipe C1 located on the lower side of the display panel 200 is parallel to the lower side edge of the display surface. Figure 9 ​​​​​​​​​​​As shown, the liquid cooling pipe C includes two sub-liquid cooling pipes C1, which are located on the lower and right sides of the display panel 200, respectively. The sub-liquid cooling pipe C1 located on the lower side of the display panel 200 is parallel to the lower edge of the display surface, and the sub-liquid cooling pipe C1 located on the right side of the display panel 200 is parallel to the right edge of the display surface.

[0092] like Figure 10 As shown, the liquid cooling pipe C includes three sub-liquid cooling pipes C1. These three sub-liquid cooling pipes C1 are located on the upper, lower, and right sides of the display panel 200, respectively. The sub-liquid cooling pipe C1 located on the lower side of the display panel 200 is parallel to the lower edge of the display surface, the sub-liquid cooling pipe C1 located on the right side of the display panel 200 is parallel to the right edge of the display surface, and the sub-liquid cooling pipe C1 located on the upper side of the display panel 200 is parallel to the upper edge of the display surface.

[0093] For example, such as Figure 4 , Figure 7 , Figure 9 or Figure 10 As shown, all connecting channels T connected to the same cavity Q have the same orientation. The orientation of a connecting channel T refers to the direction of the normal to cavity Q at the channel opening of the connecting channel T closest to cavity Q.

[0094] For example, such as Figure 4 , Figure 7 or Figure 9 As shown, the connecting channels T, which face different directions, are connected to different cavities Q.

[0095] For example, such as Figure 10 , Figure 4 , Figure 7 or Figure 9 As shown, the orientation of the connecting channel T, which connects to different cavities Q, can be the same (e.g., Figure 10 (as shown), or they can be different (e.g.) Figure 4 , Figure 7 as well as Figure 9 (As shown). The cooling effect is better when the orientation of the connecting channel T, which connects to different cavities Q, is different.

[0096] For example, the sub-liquid cooling pipe connecting the first cavity Q1 and the sub-liquid cooling pipe connecting the second cavity Q2 can be the same sub-liquid cooling pipe (e.g., Figure 10 (as shown), or for different sub-liquid cooling pipes (such as...) Figure 7 , Figure 9 as well as Figure 10 (As shown).

[0097] For example, such as Figure 4 or Figure 7As shown in the orthogonal projection on the display surface, the first connecting channel T1 and the second connecting channel T2 are located on the same side of the display panel 200.

[0098] As shown in the orthogonal projection on the display surface, the first connecting channel T1 and the second connecting channel T2 are located on the same side of the display panel 200. Figure 9 or Figure 10 As shown in the orthogonal projection on the display surface, the first connecting channel T1 and the second connecting channel T2 are located on the same side of the display panel 200.

[0099] As shown in the orthogonal projection on the display surface, the first connecting channel T1 and the second connecting channel T2 are located on the same side of the display panel 200. Figure 4 or Figure 7 As shown in the orthogonal projection on the display surface, the first connecting channel T1 and the second connecting channel T2 are located on the same side of the display panel 200.

[0100] As shown in the orthogonal projection on the display surface, the first connecting channel T1 and the second connecting channel T2 are located on the same side of the display panel 200. Figure 9 As shown in the orthogonal projection on the display surface, the first connecting channel T1 and the second connecting channel T2 are located on the same side of the display panel 200. Figure 10 In the embodiment, the first axis L1 is parallel to the lower side of the display surface.

[0101] As shown in the orthogonal projection on the display surface, the first connecting channel T1 and the second connecting channel T2 are located on the same side of the display panel 200. Figure 4 As shown in the orthogonal projection on the display surface, the first connecting channel T1 and the second connecting channel T2 are located on the same side of the display panel 200.

[0102] As shown in the orthogonal projection on the display surface, the first connecting channel T1 and the second connecting channel T2 are located on the same side of the display panel 200. Figure 7 As shown in the orthogonal projection on the display surface, the first connecting channel T1 and the second connecting channel T2 are located on the same side of the display panel 200.

[0103] As shown in the orthogonal projection on the display surface, the first connecting channel T1 and the second connecting channel T2 are located on the same side of the display panel 200. Figure 9 As shown in the orthogonal projection on the display surface, the first connecting channel T1 and the second connecting channel T2 are located on the same side of the display panel 200.

[0104] As shown in the orthogonal projection on the display surface, the first connecting channel T1 and the second connecting channel T2 are located on the same side of the display panel 200. Figure 10The first sub-liquid cooling pipe C11 is parallel to the long side of the display surface in the extension direction, and the first sub-liquid cooling pipe C11 is parallel to the short side of the display surface in the extension direction. In the case where the extension direction of the first sub-liquid cooling pipe C11 is parallel to the long side of the display surface, because the contact area with the cavity Q is larger, more connection channels T can be arranged, and the heat dissipation effect is better.

[0105] Exemplarily, the first sub-liquid cooling pipe C11 is located at the bottom of the display panel 200, that is, at the side of the display panel 200 close to the bottom surface, in which case the influence of gravity can be reduced, and the convection lines can be weakened.

[0106] Referring to Figure 4 The connection structure of the first sub-liquid cooling pipe C11, the circulating pump PU and the heat sink SR is shown. The liquid inlet of the first sub-liquid cooling pipe C11 is connected with the heat sink SR, and the liquid outlet is connected with the circulating pump PU. Under the driving of the circulating pump PU, the cooling liquid circulates along the sequence of circulating pump PU→heat sink SR→first sub-liquid cooling pipe C11→circulating pump PU, and carries away the heat in the first cavity Q1 and the second cavity Q2.

[0107] Exemplarily, as shown in Figure 6 , Figure 4 or Figure 6 , in the orthographic projection on the display surface, the first connection channel T1 and the second connection channel T2 are located at different sides of the display panel 200, and the connection channels T located at different sides of the display panel 200, such as the first connection channel T1 and the second connection channel T2, are respectively communicated with different cavities Q.

[0108] By arranging the first connection channel T1 and the second connection channel T2 on different sides, the sub-liquid cooling pipe C1 communicating with the first cavity Q1 and the sub-liquid cooling pipe C1 communicating with the second cavity Q2 are located at different sides of the display panel 200, so that the first cavity Q1 and the second cavity Q2 can be respectively cooled from different directions, and the heat dissipation effect is improved.

[0109] Exemplarily, as shown in Figure 4 or Figure 6 , in the orthographic projection on the display surface, the first connection channel T1 and the second connection channel T2 are located at opposite sides of the display panel 200.

[0110] For example, the first connection channel T1 and the second connection channel T2 can be located at opposite sides of the display panel 200 along the short side of the display surface (as shown in Figure 4 and Figure 4 ), or at opposite sides of the display panel 200 along the long side of the display surface.

[0111] Exemplarily, as shown in Figure 3 or Figure 4As shown in

[0112] Exemplarily, as shown in Figure 4 or Figure 4 The extension directions of the second sub-liquid cooling pipe C12 and the third sub-liquid cooling pipe C13 are parallel to the long side of the display surface. Since the contact area with the cavity Q is larger, more connection channels T can be arranged, and thus the heat dissipation effect is better. It should be noted that the extension directions of the second sub-liquid cooling pipe C12 and the third sub-liquid cooling pipe C13 can also be parallel to the short side of the display surface.

[0113] As shown in Figure 14 or Figure 7 The second sub-liquid cooling pipe C12 and the first connection channel T1 are located on the same side of the display panel 200, and the third sub-liquid cooling pipe C13 and the second connection channel T2 are located on the same side of the display panel 200.

[0114] Exemplarily, as shown in Figure 9 The second sub-liquid cooling pipe C12 and the third sub-liquid cooling pipe C13 are not communicated with each other.

[0115] In Figure 10 , the second sub-liquid cooling pipe C12 and the third sub-liquid cooling pipe C13 are two straight pipes parallel to each other and not communicated with each other. The liquid inlets of the second sub-liquid cooling pipe C12 and the third sub-liquid cooling pipe C13 can be located on the same side or different sides of the display panel 200.

[0116] For example, in Figure 7 , the liquid inlets of the second sub-liquid cooling pipe C12 and the third sub-liquid cooling pipe C13 are located on the left side of the display panel 200, and the liquid outlets are located on the right side of the display panel 200. Alternatively, the liquid inlet of the second sub-liquid cooling pipe C12 is located on the left side of the display panel 200, and the liquid outlet is located on the right side of the display panel 200. The liquid inlet of the third sub-liquid cooling pipe C13 is located on the right side of the display panel 200, and the liquid outlet is located on the left side of the display panel 200.

[0117] As shown in Figure 10As shown, in the case that the liquid inlet of the second sub-liquid cooling pipeline C12 and the liquid inlet of the third sub-liquid cooling pipeline C13 are located on the same side, the liquid inlet of the second sub-liquid cooling pipeline C12 and the liquid inlet of the third sub-liquid cooling pipeline C13 can be combined into one liquid inlet through a two-in-one pipeline. In the case that the liquid outlet of the second sub-liquid cooling pipeline C12 and the liquid outlet of the third sub-liquid cooling pipeline C13 are located on the same side, the liquid outlet of the second sub-liquid cooling pipeline C12 and the liquid outlet of the third sub-liquid cooling pipeline C13 can be combined into one liquid outlet through a two-in-one pipeline.

[0118] Referring to Figure 7 A connection structure diagram of the second sub-liquid cooling pipeline C12, the third sub-liquid cooling pipeline C13, the circulating pump PU and the heat sink SR is shown. The liquid inlets of the second sub-liquid cooling pipeline C12 and the third sub-liquid cooling pipeline C13 are connected with the heat sink SR, and the liquid outlets are connected with the circulating pump PU. Under the driving of the circulating pump PU, the cooling liquid circulates along the sequence of the circulating pump PU→the heat sink SR→the second sub-liquid cooling pipeline C12 and the third sub-liquid cooling pipeline C13→the circulating pump PU, and carries away the heat in the first cavity Q1 and the second cavity Q2. Among them, the second sub-liquid cooling pipeline C12 and the third sub-liquid cooling pipeline C13 are connected in parallel between the heat sink SR and the circulating pump PU.

[0119] Exemplarily, as Figure 10 shown, the liquid cooling pipeline C further comprises: a fourth sub-liquid cooling pipeline C14, the fourth sub-liquid cooling pipeline C14 is located between the second sub-liquid cooling pipeline C12 and the third sub-liquid cooling pipeline C13, the second sub-liquid cooling pipeline C12 and the third sub-liquid cooling pipeline C13 are located on different sides of the display panel 200 through the fourth sub-liquid cooling pipeline C14.

[0120] As Figure 7 shown, no connection channel T is arranged on the fourth sub-liquid cooling pipeline C14, the fourth sub-liquid cooling pipeline C14 and the second sub-liquid cooling pipeline C12 are located on two sides adjacent to the display panel 200, and the fourth sub-liquid cooling pipeline C14 and the third sub-liquid cooling pipeline C13 are located on two sides adjacent to the display panel 200. The second sub-liquid cooling pipeline C12, the fourth sub-liquid cooling pipeline C14 and the third sub-liquid cooling pipeline C13 are connected in sequence to form a U-shaped integrated liquid cooling pipeline C, the U-shaped liquid cooling pipeline C is located on three sides adjacent to the display panel 200, the first connection channel T1 and the second connection channel T2 are located on two sub-liquid cooling pipelines C1 arranged oppositely in the U-shaped liquid cooling pipeline C, and the liquid inlet and the liquid outlet of the U-shaped liquid cooling pipeline C are located on the same side of the display panel 200.

[0121] Referring to Figure 10A connection structure schematic diagram of the U-shaped liquid cooling pipeline C composed of the second sub-liquid cooling pipeline C12, the fourth sub-liquid cooling pipeline C14 and the third sub-liquid cooling pipeline C13, the circulating pump PU and the heat sink SR is shown. The liquid inlet of the U-shaped liquid cooling pipeline C is connected with the heat sink SR, and the liquid outlet is connected with the circulating pump PU. Under the driving of the circulating pump PU, the cooling liquid circulates along the sequence of the circulating pump PU→the heat sink SR→the U-shaped liquid cooling pipeline C→the circulating pump PU, and carries away the heat in the first cavity Q1 and the second cavity Q2. The second sub-liquid cooling pipeline C12, the fourth sub-liquid cooling pipeline C14 and the third sub-liquid cooling pipeline C13 are connected in series between the heat sink SR and the circulating pump PU in sequence, or the third sub-liquid cooling pipeline C13, the fourth sub-liquid cooling pipeline C14 and the second sub-liquid cooling pipeline C12 are connected in series between the heat sink SR and the circulating pump PU in sequence.

[0122] As shown in Figure 7 , in the case that the extension directions of the second sub-liquid cooling pipeline C12 and the third sub-liquid cooling pipeline C13 are parallel to the long side of the display surface, the extension direction of the fourth sub-liquid cooling pipeline C14 is parallel to the short side of the display surface. In the case that the extension directions of the second sub-liquid cooling pipeline C12 and the third sub-liquid cooling pipeline C13 are parallel to the short side of the display surface, the extension direction of the fourth sub-liquid cooling pipeline C14 is parallel to the long side of the display surface.

[0123] Exemplarily, as shown in Figure 10 , in the orthographic projection on the display surface, the first connecting channel T1 and the second connecting channel T2 are located on the two sides adjacent to the display panel 200.

[0124] Exemplarily, as shown in Figure 7 , the liquid cooling pipeline C includes the fifth sub-liquid cooling pipeline C15 and the sixth sub-liquid cooling pipeline C16 which are in communication with each other. The fifth sub-liquid cooling pipeline C15 and the sixth sub-liquid cooling pipeline C16 are located on the two sides adjacent to the display panel 200. The fifth sub-liquid cooling pipeline C15 communicates with the first cavity Q1 through the first connecting channel T1, and the sixth sub-liquid cooling pipeline C16 communicates with the second cavity Q2 through the second connecting channel T2.

[0125] As shown in Figure 7 , the fifth liquid cooling pipeline C and the first connecting channel T1 are located on the same side of the display panel 200, and the sixth liquid cooling pipeline C and the second connecting channel T2 are located on the same side of the display panel 200. The fifth sub-liquid cooling pipeline C15 and the sixth sub-liquid cooling pipeline C16 are connected in sequence to form an L-shaped integrated liquid cooling pipeline C. The L-shaped liquid cooling pipeline C is located on the two sides adjacent to the display panel 200. The two pipeline openings of the L-shaped liquid cooling pipeline C are respectively the liquid inlet and the liquid outlet.

[0126] Exemplarily, as shown in Figure 7As shown in a, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the long side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the short side of the display surface. Alternatively, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the short side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the long side of the display surface.

[0127] As shown in a, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the long side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the short side of the display surface. Alternatively, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the short side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the long side of the display surface. Figure 8 As shown in a, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the long side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the short side of the display surface. Alternatively, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the short side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the long side of the display surface.

[0128] As shown in a, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the long side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the short side of the display surface. Alternatively, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the short side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the long side of the display surface. Figure 15 As shown in a, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the long side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the short side of the display surface. Alternatively, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the short side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the long side of the display surface.

[0129] Figure 10 As shown in a, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the long side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the short side of the display surface. Alternatively, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the short side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the long side of the display surface.

[0130] As shown in a, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the long side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the short side of the display surface. Alternatively, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the short side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the long side of the display surface. Figure 10 As shown in a, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the long side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the short side of the display surface. Alternatively, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the short side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the long side of the display surface.

[0131] As shown in a, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the long side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the short side of the display surface. Alternatively, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the short side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the long side of the display surface. Figure 16 , Figure 10 Figure 9 or Figure 9 As shown in a, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the long side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the short side of the display surface. Alternatively, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the short side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the long side of the display surface.

[0132] As shown in a, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the long side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the short side of the display surface. Alternatively, the extending direction of the fifth sub-liquid cooling pipeline C15 is parallel to the short side of the display surface, and the extending direction of the sixth sub-liquid cooling pipeline C16 is parallel to the long side of the display surface. Figure 9 ​As shown, the plurality of first connection channels T1 in communication with the first cavity Q1 are arranged in a row along the extension direction of the first sub-liquid cooling pipe C11, and the plurality of second connection channels T2 in communication with the second cavity Q2 are arranged in a row along the extension direction of the first sub-liquid cooling pipe C11.

[0133] As shown, the plurality of connection channels T in communication with the same cavity Q are arranged in multiple rows, the plurality of connection channels T in each row are arranged along a second direction f2, the second direction f2 is the extension direction of the liquid cooling pipe C in communication with the connection channel T, and the multiple rows are arranged along a first direction f1. Figure 9

[0134] As shown, the plurality of connection channels T in communication with the same cavity Q are arranged in multiple rows, the plurality of connection channels T in each row are arranged along a second direction f2, the second direction f2 is the extension direction of the liquid cooling pipe C in communication with the connection channel T, and the multiple rows are arranged along a first direction f1. Figure 11 Figure 11 As shown, the plurality of first connection channels T1 in communication with the first cavity Q1 are arranged in two rows, and the adjacent two rows of first connection channels T1 can be arranged in alignment along the first direction f1 (as shown), or can be arranged in staggered manner.

[0135] As shown, the plurality of second connection channels T2 in communication with the second cavity Q2 are arranged in two rows, and the adjacent two rows of second connection channels T2 can be arranged in alignment along the first direction f1 (as shown), or can be arranged in staggered manner. Figure 11 Figure 11 As shown, the plurality of second connection channels T2 in communication with the second cavity Q2 are arranged in two rows, and the adjacent two rows of second connection channels T2 can be arranged in alignment along the first direction f1 (as shown), or can be arranged in staggered manner.

[0136] The inventor finds that, under the condition that the spacing and the number of the connection channels T are constant, the smaller the caliber of the connection channel T is, the less obvious the convection lines are but the slightly worse the heat dissipation effect is, and the larger the caliber of the connection channel T is, the more obvious the convection lines are. Exemplarily, the caliber of the connection channel T is greater than or equal to 1 mm and less than or equal to 3 mm. In this way, the obvious convection lines on the display picture can be avoided and better heat dissipation effect can be achieved.

[0137] Exemplarily, under the condition that the caliber of the connection channel T is greater than or equal to 1 mm and less than or equal to 2 mm, the convection lines and the heat dissipation effect can be better balanced.

[0138] The inventor also finds that, under the condition that the spacing and the number of the connection channels T are constant, the smaller the caliber of the connection channel T is, the smaller the fluctuation space of the liquid is, and the larger the caliber of the connection channel T is, the larger the fluctuation space of the liquid is. In order to avoid the liquid fluctuation to the display area, exemplarily, as shown, the distance between the connection channel T and the display panel 200 is greater than or equal to 10 times the caliber of the connection channel T. Figure 4

[0139] In this way, the smaller the caliber of the connection channel T is, the smaller the distance between the connection channel T and the display panel 200 is, and the larger the caliber of the connection channel T is, the larger the distance between the connection channel T and the display panel 200 is, so that the heat exchange space can be increased, and thus the convection lines on the display picture can be avoided.​​​​

[0140] The distance between the connection channel T and the display panel 200 is used to represent the size of the spacing space arranged between the connection channel T and the display panel 200. As the distance between the connection channel T and the display panel 200 increases, the spacing space arranged between the connection channel T and the display panel 200 correspondingly increases.

[0141] For example, the distance between the first connection channel T1 and the display panel 200 is greater than or equal to 10 times the caliber of the first connection channel T1, and the distance between the second connection channel T2 and the display panel 200 is greater than or equal to 10 times the caliber of the second connection channel T2.

[0142] The inventor simulated the corresponding convection lines under different connection channel T caliber and the distance between the connection channel T and the display panel 200, and the cooling liquid flow rate in the liquid cooling pipe C was 2 L / min. The simulation results are as follows:

[0143] When the caliber of the connection channel T is <0.5 mm, there is almost no convection lines;

[0144] When the caliber of the connection channel T is ≥0.5 mm, weak convection lines appear. In order to avoid the influence of the convection lines on the display picture, the distance between the connection channel T and the display panel 200 is ≥5 mm;

[0145] When the caliber of the connection channel T is ≥1 mm, the convection lines are lighter. In order to avoid the influence of the convection lines on the display picture, the distance between the connection channel T and the display panel 200 is ≥10 mm;

[0146] When the caliber of the connection channel T is ≥1.5 mm, in order to avoid the influence of the convection lines on the display picture, the distance between the connection channel T and the display panel 200 is ≥20 mm;

[0147] When the caliber of the connection channel T is ≥2 mm, the convection lines are heavier but more conducive to heat dissipation. The distance between the pipe and the screen can be increased. In order to avoid the influence of the convection lines on the display picture, the distance between the connection channel T and the display panel 200 is >30 mm. The distance between the connection channel T and the display panel 200 is, for example, less than or equal to 40 mm.

[0148] Exemplarily, the difference between the thickness of the cavity Q in the first direction f1 and the caliber of the connection channel T communicating with the cavity Q in the first direction f1 is greater than or equal to 1 mm and less than or equal to 5 mm. For example, the difference between the thickness of the first cavity Q1 in the first direction f1 and the caliber of the first connection channel T1 in the first direction f1 is greater than or equal to 1 mm and less than or equal to 5 mm. The difference between the thickness of the second cavity Q2 in the first direction f1 and the caliber of the second connection channel T2 in the first direction f1 is greater than or equal to 1 mm and less than or equal to 5 mm.

[0149] The inventor also found that the smaller the flow rate of the cooling liquid in the liquid cooling pipe C, the lighter the convection lines; the greater the flow rate, the heavier the convection lines. Exemplarily, the flow rate of the cooling liquid in the liquid cooling pipe C is less than or equal to 3 L / min. In this way, both the obvious convection lines on the display screen can be avoided and good heat dissipation effect can be achieved.

[0150] The inventor simulated the corresponding convection line degree under different cooling liquid flow rates and the distance between the connecting channel T and the display panel 200, and set the short side of the display panel to be 62 mm and the long side to be 80 mm, and the caliber of the connecting channel T to be 2 mm. The simulation results are as follows:

[0151] When the flow rate of the cooling liquid is < 2 L / min, the convection lines are light, and in order to avoid the influence of the convection lines on the display screen, the distance between the connecting channel T and the display panel 200 is in the range of 0-30 mm. Specifically, when the flow rate of the cooling liquid is ≥ 500 ml / min, the distance between the connecting channel T and the display panel 200 is ≥ 10 mm; when the flow rate of the cooling liquid is ≥ 1 L / min, the distance between the connecting channel T and the display panel 200 is ≥ 20 mm.

[0152] When the flow rate of the cooling liquid is ≥ 2 L / min, the convection lines are heavier, and in order to avoid the influence of the convection lines on the display screen, the distance between the connecting channel T and the display panel 200 needs to be ≥ 30 mm.

[0153] When the flow rate of the cooling liquid is in the range of 2 L / min-3 L / min, in order to avoid the influence of the convection lines on the display screen, the distance between the connecting channel T and the display panel 200 is in the range of 30 mm-60 mm.

[0154] When the flow rate of the cooling liquid is > 3 L / min, in order to avoid the influence of the convection lines on the display screen, the distance between the connecting channel T and the display panel 200 is > 60 mm.

[0155] It should be noted that in the above simulation results, the distance tolerance between the connecting channel T and the display panel 200 is, for example, ± 5 mm.

[0156] The inventor also found that the more the number of the connecting channels T, the better the heat exchange, and the lower the screen temperature. Exemplarily, the number of the connecting channels T connected to the same cavity Q is greater than or equal to 4 and less than or equal to 40 or 20, such as 12.

[0157] Exemplarily, the shape of the orifice of the connecting channel T is circular (as shown in Figure 7 ) or waist-round (as shown in Figure 9 ) and the like.

[0158] Exemplarily, the caliber of the connecting channel T along the second direction f2 is greater than or equal to the caliber along the first direction f1. For example, in Figure 10In the first example, the caliber of the connecting channel T along the second direction f2 is equal to the caliber along the first direction f1. Figure 4 In the second example, the caliber of the connecting channel T along the second direction f2 is greater than the caliber along the first direction f1.

[0159] Exemplarily, the material of the mounting frame 100 can be metal material such as stainless steel, aluminum, etc.

[0160] Exemplarily, the display panel 200 is a liquid crystal display panel 200.

[0161] Exemplarily, the first light-transmitting element 301 is an imaging field lens, etc., and the second light-transmitting element 302 is an illuminating field lens or heat-insulating glass, etc.

[0162] Exemplarily, as shown in Figure 12 the optical-mechanical structure further comprises a gland 400, a recess 101 is arranged in the middle of the top of the mounting frame 100, a protrusion 401 is arranged in the middle of the top of the gland 400, and the driving circuit board FPC is fixed between the recess 101 and the protrusion 401. Locking holes 500 are arranged around the mounting frame 100 and the gland 400, which are used for fixing the whole machine. A positioning groove 102 is arranged on the inner circumferential side of the mounting frame 100, which is used for positioning and clamping the display panel 200.

[0163] The optical-mechanical structure provided by the present disclosure will be exemplarily described below in combination with Figure 12 , Figure 12 , Figure 12 , Figure 12 and Figure 4 In the first example to the fifth example, the display panel 200, the first light-transmitting element 301 and the second light-transmitting element 302 are fixed in the mounting frame 100, the first light-transmitting element 301 is located on the display side of the display panel 200, and the second light-transmitting element 302 is located on the non-display side of the display panel 200. The display panel 200, the first light-transmitting element 301 and the mounting frame 100 form a first cavity Q1, the display panel 200, the second light-transmitting element 302 and the mounting frame 100 form a second cavity Q2, the first cavity Q1 and the second cavity Q2 are not communicated and are independent of each other, and the first cavity Q1 and the second cavity Q2 are both filled with cooling liquid, which includes but is not limited to fluorinated liquid. The liquid cooling pipeline C and the connecting channel T are both arranged in the mounting frame 100, the liquid cooling pipeline is communicated with the first cavity Q1 through the first connecting channel T1, and the liquid cooling pipeline is communicated with the second cavity Q2 through the second connecting channel T2.

[0164] In the first example, as shown in Figure 4As shown, the liquid cooling pipe C is located on one side of the display panel 200, including a sub-liquid cooling pipe C1, namely the first sub-liquid cooling pipe C11. The first sub-liquid cooling pipe C11 is straight and is located on the side of the display panel 200 away from the driving circuit board FPC. The extension direction of the first sub-liquid cooling pipe C11 is parallel to the long side of the display surface away from the driving circuit board FPC.

[0165] like Figure 13 As shown, the first sub-liquid cooling pipe C11 has multiple first connecting channels T1 on its wall facing the first cavity Q1, and multiple second connecting channels T2 are provided on its wall facing the second cavity Q2. The multiple first connecting channels T1 are arranged in a row along the extension direction of the first sub-liquid cooling pipe C11, and the multiple second connecting channels T2 are also arranged in a row along the extension direction of the first sub-liquid cooling pipe C11. The two openings of the first sub-liquid cooling pipe C11 are the inlet and the outlet, respectively.

[0166] The inventors conducted comparative tests on the heat dissipation effects of the optical engine structure provided in the first example and the fan-cooled optical engine structure. Using the fan-cooled optical engine structure in the comparative example, with a light source power of 130W and a brightness of 450lm, the temperature of the display panel 200 was tested at 89℃. Using the optical engine structure provided in the first example, with a light source power of 170W and a brightness of 534lm, the temperature of the display panel 200 was tested at 78℃. It is evident that the optical engine structure provided in this disclosure can improve the overall power and brightness, and can better dissipate heat from the display panel 200.

[0167] In the second example, such as Figure 4 As shown, the liquid cooling pipes C are located on opposite sides of the display panel 200, including two sub-liquid cooling pipes C1. Both sub-liquid cooling pipes C1 are straight and are designated as a second sub-liquid cooling pipe C12 and a third sub-liquid cooling pipe C13, respectively. The second sub-liquid cooling pipe C12 and the third sub-liquid cooling pipe C13 are not connected to each other. The extension direction of the second sub-liquid cooling pipe C12 is parallel to the long side of the display surface away from the driving circuit board FPC, and the extension direction of the third sub-liquid cooling pipe C13 is parallel to the long side of the display surface closer to the driving circuit board FPC.

[0168] like Figure 13 As shown, the second sub-liquid cooling pipe C12 has multiple first connecting channels T1 on its wall facing the first cavity Q1, and the third sub-liquid cooling pipe C13 has multiple second connecting channels T2 on its wall facing the second cavity Q2. The multiple first connecting channels T1 are arranged in a row along the extension direction of the second sub-liquid cooling pipe C12, and the multiple second connecting channels T2 are arranged in a row along the extension direction of the third sub-liquid cooling pipe C13. The liquid inlets of both the second sub-liquid cooling pipe C12 and the third sub-liquid cooling pipe C13 are located on the left side, and the liquid outlets are both located on the right side.

[0169] In the second example, since the liquid cooling pipe C is located on the opposite sides of the display panel 200, and the first connecting channels T1 and the second connecting channels T2 are located on the opposite sides of the display panel 200, the first cavity Q1 and the second cavity Q2 can be cooled from different directions, the cooling effect is better, and the temperature uniformity of the display panel 200 can be improved.

[0170] In the third example, as shown in Figure 3 , the liquid cooling pipe C is located on the adjacent two sides of the display panel 200, including two sub-liquid cooling pipes C1, and the two sub-liquid cooling pipes C1 are a fifth sub-liquid cooling pipe C15 and a sixth sub-liquid cooling pipe C16, and the fifth sub-liquid cooling pipe C15 and the sixth sub-liquid cooling pipe C16 are communicated to form an L-shaped liquid cooling pipe C. The extension direction of the fifth sub-liquid cooling pipe C15 is parallel to the long side of the display panel away from the driving circuit board FPC, and the extension direction of the sixth sub-liquid cooling pipe C16 is parallel to the short side of the display panel.

[0171] As shown in Figure 4 , a plurality of first connecting channels T1 are arranged on the pipe wall of the fifth sub-liquid cooling pipe C15 facing the first cavity Q1, and a plurality of second connecting channels T2 are arranged on the pipe wall of the sixth sub-liquid cooling pipe C16 facing the second cavity Q2. The plurality of first connecting channels T1 are arranged in a row along the extension direction of the fifth sub-liquid cooling pipe C15, and the plurality of second connecting channels T2 are arranged in a row along the extension direction of the sixth sub-liquid cooling pipe C16.

[0172] In the third example, since the liquid cooling pipe C is located on the adjacent two sides of the display panel 200, and the first connecting channels T1 and the second connecting channels T2 are located on the adjacent two sides of the display panel 200, the first cavity Q1 and the second cavity Q2 can be cooled in both directions, the cooling effect is better, and the temperature uniformity of the display panel 200 can be improved.

[0173] In the fourth example, as shown in Figure 7 , the liquid cooling pipe C is located on three adjacent sides of the display panel 200, including three sub-liquid cooling pipes C1, and the three sub-liquid cooling pipes C1 are a second sub-liquid cooling pipe C12, a fourth sub-liquid cooling pipe C14, and a third sub-liquid cooling pipe C13, and the second sub-liquid cooling pipe C12, the fourth sub-liquid cooling pipe C14, and the third sub-liquid cooling pipe C13 are sequentially communicated to form a U-shaped liquid cooling pipe C. The extension direction of the second sub-liquid cooling pipe C12 is parallel to the long side of the display panel away from the driving circuit board FPC, the extension direction of the third sub-liquid cooling pipe C13 is parallel to the long side of the display panel close to the driving circuit board FPC, and the extension direction of the fourth sub-liquid cooling pipe C14 is parallel to the short side of the display panel.

[0174] As shown in Figure 9As shown, the second sub-liquid cooling pipe C12 is provided with a plurality of first connecting channels T1 on the pipe wall facing the first cavity Q1, and the third sub-liquid cooling pipe C13 is provided with a plurality of second connecting channels T2 on the pipe wall facing the second cavity Q2. The plurality of first connecting channels T1 are arranged in a row along the extension direction of the second sub-liquid cooling pipe C12, and the plurality of second connecting channels T2 are arranged in a row along the extension direction of the third sub-liquid cooling pipe C13.

[0175] In the fourth example, since the liquid cooling pipe C is located on three sides of the display panel 200, the first connecting channel T1 and the second connecting channel T2 are located on the opposite sides of the display panel 200, so that the first cavity Q1 and the second cavity Q2 can be bidirectionally cooled, the cooling effect is better, and the temperature uniformity of the display panel 200 can be improved.

[0176] In the fifth example, as shown, Figure 10 the liquid cooling pipe C is located on three adjacent sides of the display panel 200, including three sub-liquid cooling pipes C1, which are the second sub-liquid cooling pipe C12, the fourth sub-liquid cooling pipe C14, and the third sub-liquid cooling pipe C13, and the second sub-liquid cooling pipe C12, the fourth sub-liquid cooling pipe C14, and the third sub-liquid cooling pipe C13 are sequentially communicated to form a U-shaped liquid cooling pipe C. The extension direction of the second sub-liquid cooling pipe C12 is parallel to the long side of the display panel away from the driving circuit board FPC, the extension direction of the third sub-liquid cooling pipe C13 is parallel to the long side of the display panel close to the driving circuit board FPC, and the extension direction of the fourth sub-liquid cooling pipe C14 is parallel to the short side of the display panel. The second sub-liquid cooling pipe C12 is provided with a plurality of first connecting channels T1 on the pipe wall facing the first cavity Q1, and the third sub-liquid cooling pipe C13 is provided with a plurality of second connecting channels T2 on the pipe wall facing the second cavity Q2. The plurality of first connecting channels T1 are arranged in a row along the extension direction of the second sub-liquid cooling pipe C12, and the plurality of second connecting channels T2 are arranged in a row along the extension direction of the third sub-liquid cooling pipe C13.

[0177] The difference between the fifth example and the fourth example is that the caliber of the first connecting channel T1 and the second connecting channel T2 is increased. In the fourth example, the caliber of the first connecting channel T1 is less than or equal to the gap width between the adjacent two first connecting channels T1, and the caliber of the second connecting channel T2 is less than or equal to the gap width between the adjacent two second connecting channels T2. In the fifth example, the caliber of the first connecting channel T1 is greater than the gap width between the adjacent two first connecting channels T1, and the caliber of the second connecting channel T2 is greater than the gap width between the adjacent two second connecting channels T2.

[0178] By increasing the caliber of the connecting channel T, the cooling effect can be further optimized. In order to avoid the influence of the flow lines on the display picture, the distance between the connecting channel T and the display panel 200 needs to be increased correspondingly.

[0179] In the fifth example, since the liquid cooling pipe C is located on three sides of the display panel 200, the first connecting channel T1 and the second connecting channel T2 are located on opposite sides of the display panel 200, and thus bidirectional heat dissipation can be performed on the first cavity Q1 and the second cavity Q2, the heat dissipation effect is better, and the temperature uniformity of the display panel 200 can be improved.

[0180] The present disclosure provides a projection device comprising the optical-mechanical structure as provided in any of the embodiments. For example, the projection device is a projector.

[0181] Exemplarily, as Figure 13 According to any of the embodiments, the projection device further comprises a circulating pump PU and a heat sink SR, the liquid outlet of the heat sink SR is connected with the liquid inlet of the liquid cooling pipe C, the liquid outlet of the liquid cooling pipe C is connected with the liquid inlet of the circulating pump PU, and the liquid outlet of the circulating pump PU is connected with the liquid inlet of the heat sink SR.

[0182] Referring to Figure 4 A connection structure schematic diagram of a liquid cooling pipe C, a circulating pump PU, and a heat sink SR is shown, the liquid cooling pipe C comprises a first sub-liquid cooling pipe C11, the liquid inlet of the first sub-liquid cooling pipe C11 is connected with the heat sink SR, and the liquid outlet is connected with the circulating pump PU. Under the driving of the circulating pump PU, the cooling liquid circulates along the sequence of the circulating pump PU→the heat sink SR→the first sub-liquid cooling pipe C11→the circulating pump PU, and carries away the heat in the cavity Q.

[0183] Referring to Figure 4 Another connection structure schematic diagram of a liquid cooling pipe C, a circulating pump PU, and a heat sink SR is shown, the liquid cooling pipe C comprises a second sub-liquid cooling pipe C12 and a third sub-liquid cooling pipe C13, the liquid inlets of the second sub-liquid cooling pipe C12 and the third sub-liquid cooling pipe C13 are connected with the heat sink SR, and the liquid outlets are connected with the circulating pump PU. Under the driving of the circulating pump PU, the cooling liquid circulates along the sequence of the circulating pump PU→the heat sink SR→the second sub-liquid cooling pipe C12 and the third sub-liquid cooling pipe C13→the circulating pump PU, and carries away the heat in the cavity Q. The second sub-liquid cooling pipe C12 and the third sub-liquid cooling pipe C13 are connected in parallel between the heat sink SR and the circulating pump PU.

[0184] Referring to Figure 7 Another connection structure schematic diagram of a liquid cooling pipe C, a circulating pump PU, and a heat sink SR is shown, the liquid cooling pipe C is a liquid cooling pipe C composed of a second sub-liquid cooling pipe C12, a fourth sub-liquid cooling pipe C14, Figure 7The U-shaped liquid cooling pipeline C is composed of the second sub-liquid cooling pipeline C12, the fourth sub-liquid cooling pipeline C14 and the third sub-liquid cooling pipeline C13 (not shown in the figure), the inlet of the U-shaped liquid cooling pipeline C is connected with the radiator SR, and the outlet is connected with the circulating pump PU. Under the driving of the circulating pump PU, the cooling liquid circulates along the sequence of the circulating pump PU→the radiator SR→the U-shaped liquid cooling pipeline C→the circulating pump PU, and carries away the heat in the cavity Q. The second sub-liquid cooling pipeline C12, the fourth sub-liquid cooling pipeline C14 and the third sub-liquid cooling pipeline C13 are connected in series between the radiator SR and the circulating pump PU.

[0185] Exemplarily, as shown in any one of Figure 9 or Figure 9 The projection device can further include a fan FAN for dissipating heat from the radiator SR.

[0186] Exemplarily, the radiator SR is a cold plate radiator SR.

[0187] Exemplarily, as shown in any one of Figure 10 Figure 10 Figure 13 Figures 14 to 16 Figure 14 Figure 15 Figure 16 Figure 16 Figure 14 Figure 16 Figures 14 to 16 The projection device can further include a cold plate LB for dissipating heat from the LED light source in the optical engine structure.

[0188] In the present disclosure, the terms "upper", "lower", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0189] In the present disclosure, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations.

[0190] In the present specification, "electrically connected" and "coupled" include the case where the constituent elements are connected together through an element having a certain electrical effect. The element having a certain electrical effect is not particularly limited as long as it can perform the transmission of electrical signals between the connected constituent elements. Examples of the element having a certain electrical effect include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, other elements having various functions, and the like.

[0191] In the present disclosure, the meaning of "a plurality of" is two or more, and the meaning of "at least one" is one or more, unless specifically defined otherwise. "At least one of A, B and C" has the same meaning as "at least one of A, B, or C" and includes the following combinations: only A, only B, only C, a combination of A and B, a combination of A and C, a combination of B and C, and a combination of A, B, and C. "A and / or B" includes the following three combinations: only A, only B, and a combination of A and B.

[0192] The use of "for" or "configured to" in the present disclosure means open and inclusive language that does not exclude devices suitable for or configured to perform additional tasks or steps.

[0193] As used in the present disclosure, "about", "approximately" or "around" includes the stated value and the mean value within an acceptable range of deviation from the stated value, as determined by one of ordinary skill in the art taking into account the measurement being discussed and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system).

[0194] As used in the present disclosure, "parallel", "perpendicular", "equal", "flush" include the stated condition and conditions similar to the stated condition within an acceptable range of deviation, wherein the acceptable range of deviation is determined by one of ordinary skill in the art taking into account the measurement being discussed and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallel and approximately parallel, wherein the acceptable range of deviation for approximately parallel may be, for example, within 10° or 5°; "perpendicular" includes absolute perpendicular and approximately perpendicular, wherein the acceptable range of deviation for approximately perpendicular may also be, for example, within 10° or 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable range of deviation for approximate equality may be, for example, a difference between the two of less than or equal to 5% of either. "Flush" includes absolute flush and approximately flush, wherein the acceptable range of deviation for approximately flush may be, for example, a distance between the two of less than or equal to 5% of the size of either.

[0195] It should be understood that when a layer or element is referred to as being disposed on one side of another layer or substrate, it can be that the layer or element is directly disposed on the other layer or substrate, or there can be an intermediate layer between the layer or element and the other layer or substrate.

[0196] The present disclosure describes example embodiments with reference to cross-sectional and / or plan view illustrations that are schematic illustrations of idealized embodiments. Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and / or tolerances, are to be expected. Thus, examples embodiments should not be construed as limited to the particular shapes of regions as illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, an etched region illustrated as a rectangle will, typically, have rounded or curved features. Thus, the regions illustrated in the figures are schematic and their shapes are not intended to illustrate the precise shape of a region of a device and are not intended to limit the scope of example embodiments.

[0197] Finally, it should be noted that the above-mentioned embodiments are merely used to illustrate the technical solutions of the present disclosure, rather than limit the present disclosure; even though the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent replacements; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. An optomechanical structure, characterized by, The display device comprises a mounting frame, a display panel, and at least one light-transmitting element, the light-transmitting element is arranged on the display side and / or the non-display side of the display panel, the display panel and the light-transmitting element are arranged on the inner circumferential side of the mounting frame along a first direction, and the display panel comprises a display surface. The display panel, the mounting frame, and the at least one light-transmitting element form at least one cavity, the cavity is filled with cooling liquid, the mounting frame is provided with a liquid cooling pipeline and a plurality of connecting channels, the connecting channels are communicated between the liquid cooling pipeline and the cavity, and in the orthographic projection on the display surface, all the connecting channels communicated with the same cavity are located on the same side of the display panel. A spacing space is arranged between the connecting channels and the display panel, and the spacing space serves as a flow space of the cooling liquid between the liquid cooling pipeline and the cavity.

2. The optical engine structure of claim 1, wherein The at least one light-transmitting element comprises a first light-transmitting element and a second light-transmitting element, the first light-transmitting element is located on the display side of the display panel, and the second light-transmitting element is located on the non-display side of the display panel.

3. The optical engine structure of claim 1, wherein The at least one cavity comprises a first cavity and a second cavity, the first cavity is formed by the display panel, the first light-transmitting element, and the mounting frame, the second cavity is formed by the display panel, the second light-transmitting element, and the mounting frame, the connecting channels communicated with the first cavity are first connecting channels, and the connecting channels communicated with the second cavity are second connecting channels. In the orthographic projection on the display surface, the first connecting channels and the second connecting channels are located on the same side of the display panel.

4. The optical engine structure of claim 3, wherein The liquid cooling pipeline comprises:

5. The optical engine structure of claim 4, wherein A first sub-liquid cooling pipeline, the first sub-liquid cooling pipeline is located on one side of the display panel, the first sub-liquid cooling pipeline is communicated with the first cavity through the first connecting channels, the first sub-liquid cooling pipeline is also communicated with the second cavity through the second connecting channels, and the first connecting channels and the second connecting channels are arranged separately from each other. A plurality of the first connecting channels and a plurality of the second connecting channels are arranged in axial symmetry about a first axis, and the first axis is parallel to the extension direction of the first sub-liquid cooling pipeline.

6. The optical engine structure of claim 5, wherein The display panel is connected with a driving circuit board, and the driving circuit board is used to drive the display panel to display.

7. The optical engine structure of claim 5, wherein In the orthographic projection on the display surface, the first sub-liquid cooling pipeline and the driving circuit board are located on different sides of the display panel. In the orthographic projection on the display surface, the first connecting channels and the second connecting channels are located on different sides of the display panel.

8. The optical engine structure of claim 3, wherein In the orthographic projection on the display surface, the first connecting channels and the second connecting channels are located on opposite sides of the display panel.

9. The optical engine structure of claim 8, wherein, The liquid cooling pipeline comprises a second sub-liquid cooling pipeline and a third sub-liquid cooling pipeline, the second sub-liquid cooling pipeline and the third sub-liquid cooling pipeline are located on opposite sides of the display panel, the second sub-liquid cooling pipeline is communicated with the first cavity through the first connecting channels, and the third sub-liquid cooling pipeline is communicated with the second cavity through the second connecting channels. ​ 10. The optical engine structure of claim 9, wherein The second sub-liquid cooling pipe and the third sub-liquid cooling pipe are not in communication with each other.

11. The optical engine structure of claim 9, wherein The liquid cooling pipe further comprises: A fourth sub-liquid cooling pipe is located between the second sub-liquid cooling pipe and the third sub-liquid cooling pipe, and the fourth sub-liquid cooling pipe is located on different sides of the display panel from the second sub-liquid cooling pipe and the third sub-liquid cooling pipe respectively, and the second sub-liquid cooling pipe and the third sub-liquid cooling pipe are in communication through the fourth sub-liquid cooling pipe.

12. The optical engine structure of claim 8, wherein, In the orthographic projection of the display surface, the first connecting channel and the second connecting channel are located on two sides adjacent to the display panel. The liquid cooling pipe comprises a fifth sub-liquid cooling pipe and a sixth sub-liquid cooling pipe in communication with each other, the fifth sub-liquid cooling pipe and the sixth sub-liquid cooling pipe are located on two sides adjacent to the display panel, the fifth sub-liquid cooling pipe is in communication with the first cavity through the first connecting channel, and the sixth sub-liquid cooling pipe is in communication with the second cavity through the second connecting channel.

13. The optical engine structure of claim 12, wherein, The liquid cooling pipe further comprises: A seventh sub-liquid cooling pipe is located on two sides adjacent to the display panel from the fifth sub-liquid cooling pipe, and the seventh sub-liquid cooling pipe is in communication with an end of the fifth sub-liquid cooling pipe away from the sixth sub-liquid cooling pipe; or The seventh sub-liquid cooling pipe and the sixth sub-liquid cooling pipe are located on two sides adjacent to the display panel, and the seventh sub-liquid cooling pipe is in communication with an end of the sixth sub-liquid cooling pipe away from the fifth sub-liquid cooling pipe.

14. The optomechanical structure of any one of claims 1 to 13, wherein, The plurality of connecting channels in communication with the same cavity are arranged in one or more rows, the plurality of connecting channels in each row are arranged along a second direction, the second direction is the extension direction of the liquid cooling pipe in communication with the connecting channel, and the plurality of rows are arranged along the first direction.

15. The optomechanical structure of any one of claims 1 to 13, wherein, The orthographic projection shape of the liquid cooling pipe on the display surface comprises at least one of the following shapes: a straight line, an L shape or a U shape.

16. The optomechanical structure of any one of claims 1 to 13, wherein, The liquid cooling pipe comprises at least one sub-liquid cooling pipe, and different sub-liquid cooling pipes are located on different sides of the display panel. The display surface is a polygon, and the extension direction of the sub-liquid cooling pipe is parallel to the adjacent polygon side.

17. The optomechanical structure of any one of claims 1 to 13, wherein, The caliber of the connecting channel along the second direction is greater than or equal to the caliber along the first direction, and the second direction is the extension direction of the liquid cooling pipe in communication with the connecting channel.

18. The optomechanical structure of any one of claims 1 to 13, wherein, The distance between the connecting channel and the display panel is greater than or equal to 10 times the caliber of the connecting channel.

19. The optomechanical structure of any one of claims 1 to 13, wherein, The difference between the thickness of the cavity in the first direction and the caliber of the connecting channel in communication with the cavity in the first direction is greater than or equal to 1 mm and less than or equal to 5 mm.

20. The optomechanical structure of any one of claims 1 to 13, wherein, The caliber of the connecting channel is greater than or equal to 1 mm and less than or equal to 3 mm.

21. The optomechanical structure of any one of claims 1 to 13, wherein, The flow of the cooling liquid in the liquid cooling pipe is less than or equal to 3 L / min.

22. A projection apparatus, characterized by comprising: The projection device comprises the optical-mechanical structure according to any one of claims 1 to 21.

23. The projection apparatus of claim 22, wherein The projection device further comprises: A circulating pump and a heat sink, the liquid outlet of the heat sink is connected with the liquid inlet of the liquid cooling pipe, the liquid outlet of the liquid cooling pipe is connected with the liquid inlet of the circulating pump, and the liquid outlet of the circulating pump is connected with the liquid inlet of the heat sink.

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