Support structure, vehicle-mounted display module and cooling method, and vehicle-mounted display device

Abstract

The embodiments of the present application provide a support structure, an on-vehicle display module, a cooling method, and an on-vehicle display device. The support structure is used to support the back of the display panel. The display panel is electrically connected to the circuit board. The circuit board and the display panel are respectively located on both sides of the support structure along the thickness direction of the support structure. A cooling chamber is provided inside the support structure. Cooling liquid flows in the cooling chamber. The cooling chamber includes an injection port and an outlet. The cooling liquid enters from the injection port and flows out from the outlet. The cooling chamber is arranged parallel to the display panel. The orthographic projections of the display panel and the circuit board on the support structure are located in the cooling chamber. The heat generated by the display panel and the circuit board during operation is transferred to the support structure. A cooling chamber is provided inside the support structure. The cooling liquid enters the cooling chamber from the injection port, absorbs the heat transferred from the circuit board and the display panel, and is discharged from the outlet, thereby achieving the purpose of cooling the display panel and the circuit board and reducing the probability of overheating of the display panel and the circuit board.

Description

Technical Field

[0001] The present application relates to the technical field of display panels, and in particular to a support structure, a vehicle-mounted display module and a cooling method, and a vehicle-mounted display device. Background Art

[0002] In recent years, due to the high clarity of OLED (Organic Light Emitting Diode) displays, it has become a hit in consumer fields such as mobile phones and tablets, and has also gradually begun to be used in the automotive field. Compared with consumer products (mobile phones, tablets, etc.), OLED car display modules have more stringent temperature reliability conditions due to the influence of factors such as vibration and heat generation of the entire device. When the temperature of OLED car display modules is high, the life of the electroluminescent materials that are more sensitive to temperature will be reduced, and it will also cause uneven attenuation of each pixel, obvious local brightness differences on the screen, and display color coordinate shifts. Therefore, there is an urgent need for a device that can cool and dissipate heat for the display module. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a support structure, an in-vehicle display module, a cooling method, and an in-vehicle display device to solve the heat dissipation problem of the display module. The specific technical solution is as follows:

[0004] In a first aspect, the present application proposes a support structure, which is used to support the back of a display panel, wherein the display panel is electrically connected to a circuit board, and the circuit board and the display panel are respectively located on both sides of the support structure along the thickness direction of the support structure; a cooling chamber is provided inside the support structure, and a cooling liquid flows through the cooling chamber, and the cooling chamber includes at least one injection port and at least one discharge port, the cooling liquid enters from the injection port and flows out from the discharge port; the cooling chamber is arranged parallel to the display panel, and the orthographic projection of the display panel on the support structure is at least partially located in the cooling chamber, and the orthographic projection of the circuit board on the support structure is located in the cooling chamber.

[0005] In some embodiments of the present application, the cooling chamber includes a partition, which divides the cooling chamber into a first cooling chamber and a second cooling chamber, and the partition is provided with a plurality of through holes to connect the first cooling chamber and the second cooling chamber; the injection port is provided in the first cooling chamber, and the discharge port is provided in the second cooling chamber, wherein the orthographic projection of the circuit board on the support structure is located in the second cooling chamber.

[0006] In some embodiments of the present application, the cooling chamber includes a plurality of injection ports and a plurality of discharge ports, the plurality of injection ports are spaced apart at the first end of the first cooling chamber, and the discharge port is arranged at the second end of the second cooling chamber; the first end and the second end are respectively located on both sides of the partition along the arrangement direction of the first cooling chamber and the second cooling chamber.

[0007] In some embodiments of the present application, the injection port and the through hole are arranged in a one-to-one correspondence.

[0008] In some embodiments of the present application, the circuit board and the display panel are electrically connected via a chip-on-film (COF), the COF comprising a first straight portion, a bent portion, and a second straight portion connected in sequence. The first straight portion at least partially overlaps the display panel, and the second straight portion at least partially overlaps the circuit board. The bent portion is located on the support structure forming the second cooling chamber and on a first side perpendicular to the plane of the display panel. The discharge port and the bent portion are staggered on the first side. Alternatively, the discharge port is located on a second side of the support structure forming the second cooling chamber, the second side being adjacent to or opposite the first side. In some embodiments of the present application, the size of the injection port is larger than that of the discharge port.

[0009] The second aspect of the present application proposes a vehicle-mounted display module, which includes a display panel, a circuit board electrically connected to the display panel, and a support structure including any embodiment of the above-mentioned first aspect, wherein the display panel and the circuit board are respectively located on both sides of the support structure along the thickness direction, and the support structure is used to support the back of the display panel.

[0010] In some embodiments of the present application, the injection port is connected to the vehicle's coolant main pipe through a first coolant sub-pipe, and the first coolant sub-pipe is provided with a first control valve; the discharge port is connected to the vehicle's coolant main pipe through a second coolant sub-pipe, and the second coolant sub-pipe is provided with a second control valve; the first control valve and the second control valve are controlled by the vehicle's controller based on the temperature of the display panel and the circuit board.

[0011] A third aspect of the present application provides a method for cooling a vehicle-mounted display module, which is used to cool the vehicle-mounted display module described in any embodiment of the second aspect, comprising the following steps:

[0012] The actual temperature of the vehicle-mounted display module is detected in real time.

[0013] When the actual temperature exceeds the preset temperature, the controller controls the first control valve to open, and injects the coolant into the cooling chamber through the injection port until the coolant fills the cooling chamber.

[0014] After a predetermined time has passed, the controller controls the second control valve to open to maintain the circulation of the coolant.

[0015] Detecting the temperature change rate of the vehicle-mounted display module and selecting an appropriate cooling program according to the temperature change rate.

[0016] A fourth aspect of the present application provides a vehicle-mounted display device, comprising the vehicle-mounted display module in any embodiment of the second aspect.

[0017] The support structure provided in the embodiments of the present application is used to support the back of a display panel. The support structure serves to fix and support the display panel. The display panel and circuit board generate a large amount of heat during operation. The support structure is arranged parallel to the display panel and located between the display panel and the circuit board. The support structure has a larger heat exchange area with the display panel and the circuit board. The orthographic projection of the display panel on the support structure is at least partially located in a cooling chamber. The orthographic projection of the circuit board on the support structure is also located in the cooling chamber. The heat generated by the display panel and the circuit board is transferred to the support structure. A cooling chamber is provided within the support structure. A coolant flows through the cooling chamber. The coolant enters the cooling chamber from an inlet, absorbs heat transferred from the circuit boards and the display panel on both sides of the support structure, and is then discharged from an outlet. This achieves the purpose of cooling the display panel and the circuit board, reduces the probability of overheating of the display panel and the circuit board, and ensures that the display panel and the circuit board operate within the allowable temperature range. Since the operating temperature of the display panel and the circuit board is guaranteed, the life of the electroluminescent material that is more sensitive to temperature is extended, the attenuation of each pixel is more uniform, and the problems of obvious local brightness differences on the screen and display color coordinate shift can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other embodiments can also be obtained based on these drawings.

[0019] Figure 1 This is a cross-sectional view of the overall structure of the vehicle-mounted display module supporting the structure according to an embodiment of the present application;

[0020] Figure 2 for Figure 1 A local enlarged view of the middle area A;

[0021] Figure 3 This is a schematic structural diagram of a support structure in an embodiment of the present application in which the discharge port is located on the first side surface;

[0022] Figure 4 This is a diagram showing a state in which the second cooling chamber is filled with coolant when the discharge port in the supporting structure of the embodiment of the present application is located on the second side surface;

[0023] Figure 5 This is a diagram showing a state in which the cooling chamber is filled with coolant when the discharge port in the supporting structure of the embodiment of the present application is located on the second side surface;

[0024] Figure 6 This is a state diagram of the coolant being partially discharged when the discharge port in the support structure of the embodiment of the present application is located on the second side surface;

[0025] Figure 7 This is a state diagram of the coolant being completely discharged when the discharge port in the support structure of the embodiment of the present application is located on the second side.

[0026] The reference numerals are as follows:

[0027] Area A: display panel 10, COF 20, first straight portion 21, curved portion 22, second straight portion 23, circuit board 30, polarizer 50, touch layer 60, glass cover 70, optical adhesive 80, foam adhesive 90;

[0028] Support structure 100, first side 110, second side 120, cooling chamber 200, first cooling chamber 210, second cooling chamber 220, injection port 230, discharge port 240, coolant 300, partition 400, through hole 410, first spacing L, second spacing t, wall thickness g, first diameter D, second diameter d. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field based on this application are within the scope of protection of this application.

[0030] like Figures 1 to 5As shown, in a first aspect, the present application provides a support structure 100. The support structure 100 is used to support the back surface of a display panel 10. The display panel 10 is electrically connected to a circuit board 30. The circuit board 30 and the display panel 10 are respectively located on both sides of the support structure 100 along the thickness direction of the support structure 100. A cooling chamber 200 is provided inside the support structure 100. A coolant 300 flows through the cooling chamber 200. The cooling chamber 200 includes at least one inlet 230 and at least one outlet 240. The coolant 300 enters through the inlet 230 and flows out through the outlet 240. The cooling chamber 200 is arranged parallel to the display panel 10. The orthographic projection of the display panel 10 on the support structure 100 is at least partially located within the cooling chamber 200. The orthographic projection of the circuit board 30 on the support structure 100 is also located within the cooling chamber 200.

[0031] In this embodiment, the display panel 10 includes a light emitting surface and a back surface that are relatively arranged. The support structure 100 is used to support the back surface of the display panel 10. The support structure 100 fixes and supports the display panel 10. The display panel 10 and the circuit board 30 will generate a large amount of heat during operation. The support structure 100 is arranged parallel to the display panel 10 and is located between the display panel 10 and the circuit board 30. The heat exchange area between the support structure 100 and the display panel 10 and the circuit board 30 is larger. The orthographic projection of the display panel 10 on the support structure 100 is at least partially located in the cooling chamber 200, and the orthographic projection of the circuit board 30 on the support structure 100 is located in the cooling chamber 200. Within the cooling chamber 200, heat generated by the display panel 10 and the circuit board 30 is transferred to the support structure 100. The support structure 100 is provided with a cooling chamber 200 within which coolant 300 flows. The coolant 300 enters the cooling chamber 200 through an inlet 230. The coolant 300 absorbs heat transferred from the circuit boards 30 and the display panel 10 on both sides of the support structure 100 and is then discharged through an outlet 240. This achieves the purpose of cooling the display panel 10 and the circuit board 30, reducing the probability of overheating of the display panel 10 and the circuit board 30, and ensuring that the display panel 10 and the circuit board 30 operate within the allowable temperature range. Because the operating temperature of the display panel 10 and the circuit board 30 is guaranteed, the lifespan of the temperature-sensitive electroluminescent material is extended, the attenuation of each pixel is more uniform, and problems such as significant local brightness differences on the screen and display color coordinate shifts can be improved.

[0032] like Figure 3As shown, in some embodiments, the cooling chamber 200 includes a partition 400, which divides the cooling chamber 200 into a first cooling chamber 210 and a second cooling chamber 220. The partition 400 is provided with a plurality of through holes 410 at intervals to connect the first cooling chamber 210 and the second cooling chamber 220; the injection port 230 is provided in the first cooling chamber 210, and the discharge port 240 is provided in the second cooling chamber 220, wherein the orthographic projection of the circuit board 30 on the support structure 100 is located in the second cooling chamber 220, that is, the position of the circuit board 30 is opposite to the position of the second cooling chamber 220.

[0033] In this embodiment, the partition 400 divides the cooling chamber 200 into a first cooling chamber 210 and a second cooling chamber 220. The inlet 230 and the outlet 240 are respectively provided in the first cooling chamber 210 and the second cooling chamber 220. This allows the coolant 300 to first enter the first cooling chamber 210 through the inlet 230, then pass through the through hole 410 into the second cooling chamber 220, and then be discharged from the outlet 240 provided in the second cooling chamber 220. In other words, the coolant 300 must pass through the first cooling chamber 210 and the second cooling chamber 220 during the process of entering and exiting the cooling chamber 200. This reduces uneven flow of the coolant 300 in the cooling chamber 200 and prevents local overheating caused by uneven cooling of the display panel 10 and the circuit board 30 by the support structure 100. The number of circuit boards 30 can be one or more, and the cooling structure 100 can cool one or more circuit boards 30.

[0034] It is understandable that the support structure 100 can be used for a vehicle-mounted display module, and can also be used for a display module of a display device such as an LCD TV, a tablet, or a mobile phone. When the support structure 100 is used for a vehicle-mounted display module, in order to facilitate viewing by the driver, the vehicle-mounted display module is generally placed vertically, that is, the vehicle-mounted display module is perpendicular to the ground or tilted at a certain angle to the ground. Similarly, the support structure 100 is also placed vertically, and the support structure 100 is perpendicular to the ground or tilted at a certain angle to the ground. When the vehicle-mounted display module is placed vertically, the arrangement of the partition 400 allows the first cooling chamber 210 and the second cooling chamber 220 to be arranged up and down, such as Figure 4 As shown, the coolant 300 enters the first cooling chamber 210 from the injection port 230. Since the second cooling chamber 220 is located at the bottom of the first cooling chamber 210, gravity causes the coolant 300 to preferentially fill the second cooling chamber 220 through the through hole 410. Therefore, the circuit board 30 opposite the second cooling chamber 220 is cooled first, lowering the temperature at the location of the circuit board 30.

[0035] It is understandable that the coolant 300 in the second cooling chamber 220 is filled first, and then the first cooling chamber 210 is filled with the coolant 300. During this process, the coolant 300 in the second cooling chamber 220 absorbs heat from the circuit board 30, resulting in a temperature higher than that of the coolant 300 in the first cooling chamber 210. The discharge port 240 is provided in the second cooling chamber 220, and the discharge port 240 preferentially discharges the coolant 300 with a higher temperature in the second cooling chamber 220. The coolant 300 in the first cooling chamber 210 enters the second cooling chamber 220 through the through hole 410 to continue secondary cooling of the circuit board 30. This helps solve the problem of uneven temperature of the display module and effectively helps cool the display module.

[0036] Furthermore, if Figure 3 As shown, the bottom edge of the circuit board 30 is flush with the bottom edge of the second cooling chamber 220, that is, the circuit board 30 is located at the bottom of the second cooling chamber 220. When the support structure is used for a vertically placed vehicle display module, due to gravity, such as Figure 4 As shown, the coolant 300 will first reach the bottom of the second cooling chamber 220 and gradually fill from the bottom to the top of the second cooling chamber 220. The bottom edge of the circuit board 30 is set at a position flush with the bottom edge of the second cooling chamber 220, so that the coolant 300 can first absorb the heat of the circuit board 30, which can achieve a better cooling effect.

[0037] In some embodiments, as Figure 3 As shown, the cooling chamber 200 includes a plurality of injection ports 230 and a plurality of discharge ports 240. The plurality of injection ports 230 are spaced apart at the first end of the first cooling chamber 210, and the discharge port 240 is provided at the second end of the second cooling chamber 220. The first end and the second end are respectively located on both sides of the partition 400 along the arrangement direction of the first cooling chamber 210 and the second cooling chamber 220.

[0038] In this embodiment, multiple injection ports 230 and multiple discharge ports 240 are provided to increase the flow rate of the coolant 300, including the speed at which the coolant 300 fills the cooling chamber 200 and the speed at which the coolant 300 discharges from the cooling chamber 200, thereby improving cooling efficiency. The multiple injection ports 230 are arranged at intervals so that when the coolant 300 enters the cooling chamber 200 from the injection ports 230, it can be quickly distributed to various areas of the cooling chamber 200, preventing overheating in areas reached later by the coolant 300. The multiple discharge ports 240 are provided to quickly discharge the coolant 300 that has absorbed heat from the multiple discharge ports 240, allowing the coolant 300 at a lower temperature to enter the cooling chamber 200 from the injection ports 230, thereby improving the cooling effect.

[0039] The first end and the second end are located on either side of the partition 400 along the arrangement direction of the first cooling chamber 210 and the second cooling chamber 220. That is, the injection port 230 at the first end and the discharge port 240 at the second end are located relatively far apart, ensuring that the coolant 300 can flow a longer distance in the cooling chamber 200 and fully absorb the heat of the display panel 10 and the circuit board 30. Preferably, when the support structure 100 is placed vertically, the multiple injection ports 230 are spaced apart at the top of the first cooling chamber 210, and the discharge port 240 is located at the bottom of the second cooling chamber 220.

[0040] In some embodiments, as Figure 3 As shown, the first distance L between adjacent injection ports 230 is 80-120 mm, specifically 80 mm, 90 mm, 100 mm, 110 mm, or 120 mm. The specific selection of the first distance L can be based on the size of the display panel 10 and the number of injection ports 230 .

[0041] In some embodiments, as Figure 3 As shown, the second spacing t between adjacent outlets 240 is 60-100 mm, specifically 60 mm, 70 mm, 80 mm, 90 mm, or 100 mm. The specific selection of the second spacing t can be selected according to the size of the display panel 10 and the number of outlets 240.

[0042] In some embodiments, as Figure 3 As shown, the injection port 230 and the through hole 410 are arranged in a one-to-one correspondence.

[0043] The injection port 230 and the through hole 410 are arranged in a one-to-one correspondence. The coolant 300 enters the first cooling chamber 210 from the injection port 230 and enters the second cooling chamber 220 through the through hole 410. This allows the coolant 300 to flow into the second cooling chamber 220 at the shortest distance to cool the position where the circuit board 30 is located, thereby preventing the circuit board 30 from overheating and improving the cooling efficiency.

[0044] In some embodiments, as Figure 1 and Figure 3As shown, the circuit board 30 is electrically connected to the display panel 10 through the chip-on-film 20. The chip-on-film 20 includes a first straight portion 21, a bent portion 22, and a second straight portion 23 connected in sequence. The first straight portion 21 at least partially overlaps with the display panel 10, and the second straight portion 23 at least partially overlaps with the circuit board 30. The bent portion 22 is located on the support structure 100 that forms the second cooling chamber 220, and is located on the first side 110 that is perpendicular to the plane where the display panel 10 is located. The discharge port 240 and the bent portion 22 are staggered on the first side 110; alternatively, the discharge port 240 is located on the second side 120 of the support structure 100 that forms the second cooling chamber 220, and the second side 120 is adjacent to or opposite to the first side 110.

[0045] In this embodiment, the first straight portion 21 at least partially overlaps the display panel 10, and the second straight portion 23 at least partially overlaps the circuit board 30. The first straight portion 21 and the second straight portion 23 are connected by a bent portion 22. The second cooling chamber 220 is located within the support structure 100, and the support structure 100 serves as the sidewalls of the second cooling chamber 220. It can be understood that the inlet 230 and outlet 240 of the second cooling chamber 220 are communication ports provided on the support structure 100 and communicating with the inner cavity of the cooling chamber 200. The bent portion 22 is located on the support structure 100 that forms the second cooling chamber 220, and is located on the first side surface 110 perpendicular to the plane of the display panel 10. In other words, the bent portion 22 is located on the side surface of the support structure 100 in the thickness direction. The outlet 240 and the bent portion 22 are staggered on the first side 110 to prevent mutual interference. Furthermore, when multiple outlets 240 are provided, the outlets 240 are spaced apart, and the chip-on-film 20 is positioned between two adjacent outlets 240, which helps optimize the spatial arrangement of the display module. Alternatively, the outlet 240 is located on the second side 120 of the support structure 100 that forms the second cooling chamber 220, and the second side 120 is adjacent to or opposite to the first side 110. In other words, the chip-on-film 20 and the outlet 240 are not on the same side of the support structure 100 in the thickness direction. In this way, the chip-on-film 20 and the outlet 240 do not interfere with each other, allowing for greater flexibility in positional design.

[0046] In some embodiments, the size of the injection port 230 is larger than the size of the discharge port 240 .

[0047] In this embodiment, when the display panel 10 and the circuit board 30 are overheated, the coolant 300 is injected and discharged simultaneously to accelerate the circulation speed of the coolant 300. During this cooling process, since the size of the injection port 230 is larger than the size of the discharge port 240, that is, the speed of injecting the coolant 300 into the cooling chamber 200 is faster than the speed of discharging the coolant 300, it can be ensured that the cooling chamber 200 is always filled with the coolant 300, thereby enhancing the cooling effect of the support structure 100.

[0048] In some embodiments, the first diameter D of the injection port 230 is 15-30 mm, and the second diameter d of the discharge port 240 is 10-20 mm.

[0049] In this embodiment, the first diameter D of the injection port 230 is 15-30 mm, specifically 15 mm, 18 mm, 20 mm, 22 mm, 25 mm, 28 mm, and 30 mm, and the second diameter d of the discharge port 240 is 10-20 mm, specifically 10 mm, 13 mm, 15 mm, 18 mm, and 20 mm. In terms of the combination of the first diameter D of the injection port 230 and the second diameter d of the discharge port 240, it is preferred that the first diameter D of the injection port 230 is larger than the second diameter d of the discharge port 240, or the first diameter D of the injection port 230 can be equal to the second diameter d of the discharge port 240.

[0050] In some embodiments, the support structure 100 is preferably a support plate made of metal material. The support structure 100 is attached to the back of the display panel 10 and is bonded to the display panel 10 via thermally conductive adhesive.

[0051] In this embodiment, the support structure 100 is preferably made of a metal material, specifically iron or aluminum, as metal has good structural strength and thermal conductivity. The display panel 10 is a plate-like structure, and the support structure 100 is preferably arranged in a plate-like structure in close contact with the display panel 10 to maximize the heat exchange area and enhance the cooling effect.

[0052] like Figure 3 As shown, the wall thickness g between the outer wall of the display panel 10 and the cooling chamber 200 is preferably 10-20 mm, specifically 10 mm, 15 mm, or 20 mm. The wall thickness g is greater than 10 mm to ensure the structural strength of the support structure 100, and the wall thickness g is less than 20 mm to avoid low heat exchange efficiency between the coolant 300 and the circuit board 30 and the display panel 10.

[0053] The second aspect of the present application proposes a vehicle-mounted display module, such as Figure 1 and Figure 2As shown, the vehicle-mounted display module includes a display panel 10, a circuit board 30 electrically connected to the display panel 10, and a support structure 100 in any embodiment of the first aspect mentioned above. The display panel 10 and the circuit board 30 are respectively located on both sides of the support structure 100 along the thickness direction, and the support structure 100 is used to support the back of the display panel 10.

[0054] In this embodiment, the support structure 100 is used to support the back of the display panel 10. The support structure 100 fixes and supports the display panel 10. The display panel 10, the circuit board 30 and the support structure 100 together constitute an in-vehicle display module. The display panel 10 and the circuit board 30 generate a large amount of heat during operation. The support structure 100 is arranged parallel to the display panel 10 and is located between the display panel 10 and the circuit board 30. The heat exchange area between the support structure 100 and the display panel 10 and the circuit board 30 is larger. The orthographic projection of the display panel 10 on the support structure 100 is at least partially located in the cooling chamber 200. The circuit board 30 is on the support structure 100. The orthographic projection on the display panel 10 is located in the cooling chamber 200. The heat generated by the display panel 10 and the circuit board 30 is transferred to the support structure 100. The support structure 100 is provided with a cooling chamber 200 inside. Cooling liquid 300 flows in the cooling chamber 200. The cooling liquid 300 enters the cooling chamber 200 from the injection port 230. The cooling liquid 300 absorbs the heat transferred from the circuit boards 30 and the display panel 10 on both sides of the support structure 100 and is then discharged from the discharge port 240. This achieves the purpose of cooling the display panel 10 and the circuit board 30, reduces the probability of overheating of the cooling panel and the circuit board 30, and ensures that the display panel 10 and the circuit board 30 operate within the allowable temperature range. Since the operating temperature of the display panel 10 and the circuit board 30 is guaranteed, the life of the electroluminescent material that is more sensitive to temperature is extended, the attenuation of each pixel is more uniform, and it can improve problems such as obvious local brightness differences on the screen and display color coordinate shift.

[0055] In some embodiments, the injection port 230 is connected to the vehicle's coolant main pipe through a first coolant sub-pipe, and the first coolant sub-pipe is provided with a first control valve; the discharge port 240 is connected to the vehicle's coolant main pipe through a second coolant sub-pipe, and the second coolant sub-pipe is provided with a second control valve; the first control valve and the second control valve are controlled by the vehicle's controller based on the temperature of the display panel 10 and the circuit board 30.

[0056] In this embodiment, the inlet 230 of the vehicle display module support structure 100 is connected to the vehicle's main coolant pipe via a first coolant sub-pipe. The vehicle's coolant 300 enters the first coolant sub-pipe through the main coolant pipe and then enters the cooling chamber 200 through the inlet 230. The first coolant sub-pipe is equipped with a first control valve to control the flow of coolant 300 into and out of the cooling chamber 200. The outlet 240 is connected to the vehicle's main coolant pipe via a second coolant sub-pipe. The coolant 300 in the cooling chamber 200 is discharged from the outlet 240 through the second coolant sub-pipe into the main coolant pipe. The second coolant sub-pipe is equipped with a second control valve to control the flow of coolant 300 from the cooling chamber 200.

[0057] In some embodiments, as Figure 2 As shown, the vehicle-mounted display module also includes a polarizer 50, a touch layer 60 and a glass cover plate 70, which are arranged in sequence along the direction away from the surface of the display panel 10 on the side of the light-emitting surface of the display panel 10. The two sides of the touch layer 60 are respectively bonded to the polarizer 50 and the glass cover plate 70 by optical adhesive 80.

[0058] In some embodiments, as Figure 1 As shown, in the vehicle-mounted display module, a foam adhesive 90 is provided on the side of the support structure 100 away from the display panel 10. The foam adhesive 90 is provided on both sides of the circuit board 30 to fix the circuit board 30 to the back of the support structure 100. The chip-on-chip film 20 is located on the side of the foam adhesive 90 away from the support structure 100. The foam adhesive 90 can provide good support for the chip-on-chip film 20 to prevent the chip-on-chip film 20 from being in a suspended state, and also provide good support for the circuit board 30.

[0059] A third aspect of the present application provides a method for cooling a vehicle-mounted display module, which is used to cool the vehicle-mounted display module in any embodiment of the second aspect, comprising the following steps:

[0060] S1. Real-time detection of the actual temperature of the vehicle display module.

[0061] S2. When the actual temperature exceeds the preset temperature, the controller controls the first control valve to open, and injects the coolant 300 into the cooling chamber 200 through the injection port 230 until the coolant 300 fills the cooling chamber 200.

[0062] S3. After a predetermined time, the controller controls the second control valve to open to maintain the circulation of the coolant 300.

[0063] S4. Detect the temperature change rate of the vehicle display module and select an appropriate cooling program according to the temperature change rate.

[0064] In this embodiment, the actual temperature of the vehicle display module, including the temperature of the display panel 10 and the temperature of the circuit board 30, is detected in real time. When the actual temperature exceeds a preset temperature, the controller controls the first control valve to open and injects coolant 300 into the cooling chamber 200 through the injection port 230 until the coolant 300 fills the cooling chamber 200. After a predetermined time, preferably after the coolant 300 fills the cooling chamber 200, the controller controls the second control valve to open to maintain the flow of coolant 300 and continuously cool the vehicle display module. In addition, the temperature detection element detects the temperature change rate of the vehicle display module and selects an appropriate cooling program based on the temperature change rate.

[0065] The controller's control of the opening and closing of the first and second control valves based on temperature is not limited to the above embodiment. Other embodiments are also possible. For example, when the detected temperature of the display panel 10 or the circuit board 30 is higher than a preset temperature, the first and second control valves are controlled to open simultaneously, and the coolant 300 flows from the injection port 230 into the cooling chamber 200 and then out of the discharge port 240, thereby maintaining the circulation state of the coolant 300 and accelerating cooling.

[0066] Preferably, when the detected temperature of the display panel 10 or the circuit board 30 is higher than a preset temperature, Figure 4 As shown, the first control valve is opened, the second control valve is closed, and the coolant 300 is injected into the cooling chamber 200. Due to gravity, the coolant 300 first fills the second cooling chamber 220. Figure 5 In the state shown, the cooling liquid 300 fills the first cooling chamber 210 and the second cooling chamber 220. After the cooling liquid 300 fully absorbs the heat of the circuit board 30 and the display panel 10, the second control valve is opened. Figure 6 As shown, since the discharge port 240 is located in the second cooling chamber 220, and the orthographic projection of the circuit board 30 on the support structure 100 is located in the second cooling chamber 220, since the temperature of the circuit board 30 is higher, the temperature of the coolant 300 in the second cooling chamber 220 is higher than the temperature of the coolant 300 in the first cooling chamber 210. The discharge port 240 preferentially discharges the coolant 300 in the second cooling chamber 220 with a higher temperature. At this time, the coolant with a lower temperature in the first cooling chamber 210 enters the second cooling chamber 220 through the through hole and continues to perform secondary cooling for the position of the circuit board 30. Finally, all the coolant 300 is discharged from the discharge port 240 as shown in FIG. Figure 7 status.

[0067] A fourth aspect of the present application provides a vehicle-mounted display device, comprising the vehicle-mounted display module in any embodiment of the second aspect.

[0068] In this embodiment, the vehicle-mounted display module in the vehicle-mounted display device includes the support structure 100 in any embodiment of the first aspect above, and the support structure 100 is used to support the back of the display panel 10. The support structure 100 fixes and supports the display panel 10. The display panel 10, the circuit board 30 and the support structure 100 together constitute the vehicle-mounted display module. The display panel 10 and the circuit board 30 will generate a large amount of heat during operation. The support structure 100 is arranged parallel to the display panel 10 and is located between the display panel 10 and the circuit board 30. The heat exchange area between the support structure 100 and the display panel 10 and the circuit board 30 is larger, and the positive projection of the display panel 10 on the support structure 100 is at least partially located in the cooling area. Within chamber 200, the orthographic projection of the circuit board 30 on the support structure 100 is located within the cooling chamber 200. The heat generated by the display panel 10 and the circuit board 30 is transferred to the support structure 100. The support structure 100 is provided with a cooling chamber 200 inside which coolant 300 flows. The coolant 300 enters the cooling chamber 200 from an inlet 230. The coolant 300 absorbs heat transferred from the circuit boards 30 and the display panel 10 on both sides of the support structure 100 and is then discharged from an outlet 240. This achieves the purpose of cooling the display panel 10 and the circuit board 30, reduces the probability of overheating of the cooling panels and the circuit board 30, and ensures that both the display panel 10 and the circuit board 30 operate within the allowable temperature range. Since the operating temperature of the display panel 10 and the circuit board 30 is guaranteed, the life of the electroluminescent material, which is more sensitive to temperature, is extended, the attenuation of each pixel is more uniform, and the problems of obvious local brightness differences on the screen and the shift in display color coordinates can be improved.

[0069] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0070] Each embodiment in this specification is described in a related manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0071] The above are only preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application are included in the scope of protection of the present application.

Claims

1. A support structure, applied to a vehicle-mounted display module, characterized in that: The support structure is perpendicular to the ground or has an inclined angle with the ground, and is used to support the back of the display panel. The display panel is electrically connected to the circuit board, and the circuit board and the display panel are respectively located on both sides of the support structure along the thickness direction of the support structure; A cooling chamber is provided inside the support structure, wherein a coolant flows in the cooling chamber, and the cooling chamber includes at least one injection port and at least one discharge port, wherein the coolant enters through the injection port and flows out through the discharge port; The cooling chamber is arranged parallel to the display panel, the orthographic projection of the display panel on the support structure is at least partially located in the cooling chamber, and the orthographic projection of the circuit board on the support structure is located in the cooling chamber; The cooling chamber includes a partition, the partition divides the cooling chamber into a first cooling chamber and a second cooling chamber, and the partition is provided with a plurality of through holes to allow the first cooling chamber and the second cooling chamber to communicate; The injection port is provided in the first cooling chamber, and the discharge port is provided in the second cooling chamber, wherein the orthographic projection of the circuit board on the supporting structure is located in the second cooling chamber; The second cooling chamber is located at the bottom of the first cooling chamber, and the bottom edge of the circuit board is flush with the bottom edge of the second cooling chamber; The size of the injection port is larger than that of the discharge port.

2. The support structure according to claim 1, characterized in that The cooling chamber includes a plurality of injection ports and a plurality of discharge ports, wherein the plurality of injection ports are spaced apart at a first end of the first cooling chamber, and the discharge ports are disposed at a second end of the second cooling chamber; The first end portion and the second end portion are respectively located on both sides of the partition along an arrangement direction of the first cooling chamber and the second cooling chamber.

3. The support structure according to claim 1, characterized in that The injection ports are arranged in a one-to-one correspondence with the through holes.

4. The support structure according to any one of claims 1 to 3, characterized in that: The circuit board is electrically connected to the display panel via a chip-on-film (COF), the COF comprising a first straight portion, a bent portion, and a second straight portion connected in sequence, the first straight portion at least partially overlapping the display panel, the second straight portion at least partially overlapping the circuit board, the bent portion being located on the support structure forming the second cooling chamber and on a first side surface perpendicular to the plane where the display panel is located, the discharge port and the bent portion being staggered on the first side surface; or, The exhaust port is located on a second side surface of the support structure forming the second cooling chamber, and the second side surface is adjacent to or opposite to the first side surface.

5. A vehicle-mounted display module, characterized in that: The vehicle-mounted display module includes a display panel, a circuit board electrically connected to the display panel, and a supporting structure according to any one of claims 1 to 4. The display panel and the circuit board are respectively located on both sides of the supporting structure along the thickness direction, and the supporting structure is used to support the back of the display panel.

6. The vehicle-mounted display module according to claim 5, characterized in that: The injection port is connected to the vehicle's coolant main pipe through a first coolant sub-pipe, and the first coolant sub-pipe is provided with a first control valve; the discharge port is connected to the vehicle's coolant main pipe through a second coolant sub-pipe, and the second coolant sub-pipe is provided with a second control valve; The first control valve and the second control valve are controlled by a controller of a vehicle based on temperatures of the display panel and the circuit board.

7. A method for cooling a vehicle-mounted display module, used for cooling the vehicle-mounted display module as claimed in claim 6, characterized in that: The following steps are involved: Real-time detection of the actual temperature of the vehicle-mounted display module; When the actual temperature exceeds the preset temperature, the controller controls the first control valve to open, and injects the coolant into the cooling chamber through the injection port until the coolant fills the cooling chamber; After a predetermined time has passed, the controller controls the second control valve to open to maintain the circulation of the coolant; Detecting the temperature change rate of the vehicle-mounted display module and selecting an appropriate cooling program according to the temperature change rate.

8. A vehicle-mounted display device, comprising the vehicle-mounted display module according to claim 5 or 6.

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