CN116347853A - Supporting structure, vehicle-mounted display module and cooling method and vehicle-mounted display device - Google Patents

Abstract

The embodiment of the application provides a support structure, a vehicle-mounted display module, a cooling method and a vehicle-mounted display device, wherein the support structure is used for supporting the back surface of a display panel, the display panel is electrically connected with a circuit board, and the circuit board and the display panel are respectively positioned on two sides of the support structure along the thickness direction of the support structure; the support structure is internally provided with a cooling chamber, cooling liquid is circulated in the cooling chamber, the cooling chamber comprises an injection port and a discharge port, and the cooling liquid enters from the injection port and flows out from the discharge port. The cooling chamber is arranged in parallel with the display panel, and the orthographic projection of the display panel and the circuit board on the supporting structure is positioned in the cooling chamber. The heat that can produce in display panel and the circuit board work and transmit to bearing structure, bearing structure inside is provided with the cooling chamber, and the coolant liquid enters into the cooling chamber from the filling opening, absorbs and discharges from the discharge port after by circuit board and the heat that display panel transmitted, reaches the purpose for display panel and circuit board cooling, reduces display panel and the overheated probability of circuit board.

Description

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

Technical Field

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

Background

In recent years, OLED (Organic Light Emitting Diode, organic electroluminescent display) displays high definition, and has been increasingly used in consumer fields such as mobile phones and tablets, and in vehicle-mounted fields. Compared with consumer products (mobile phones, flat plates and the like), the OLED vehicle-mounted display module is influenced by factors such as vibration, heating of the whole machine end and the like, and the temperature reliability condition is more severe. When the temperature of the OLED vehicle-mounted display module is higher, the service life of the electroluminescent material sensitive to the temperature is reduced, meanwhile, the attenuation of each pixel is uneven, the local brightness difference of the screen is obvious, the display color coordinate is deviated and the like. Therefore, a device for cooling and dissipating heat for the display module is needed.

Disclosure of Invention

An object of the embodiment of the application is to provide a supporting structure, a vehicle-mounted display module, a cooling method and a vehicle-mounted display device, so as to solve the problem of heat dissipation of the display module. The specific technical scheme is as follows:

the first aspect of the present application proposes a support structure, where the support structure is configured to support a back surface of a display panel, the display panel is electrically connected to a circuit board, and the circuit board and the display panel are respectively located at two sides of the support structure along a thickness direction of the support structure; a cooling chamber is arranged in the supporting structure, cooling liquid flows in the cooling chamber, the cooling chamber comprises at least one injection port and at least one discharge port, and the cooling liquid enters from the injection port and flows out from the discharge port; the cooling chamber is arranged in parallel with the display panel, the orthographic projection of the display panel on the supporting structure is at least partially positioned in the cooling chamber, and the orthographic projection of the circuit board on the supporting structure is positioned in the cooling chamber.

In some embodiments of the present application, the cooling chamber includes a partition dividing the cooling chamber into a first cooling chamber and a second cooling chamber, the partition being provided with a plurality of through holes at intervals to allow the first cooling chamber and the second cooling chamber to communicate; the injection port is arranged in the first cooling chamber, the discharge port is arranged in the second cooling chamber, and the orthographic projection of the circuit board on the supporting structure is positioned in the second cooling chamber.

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 disposed at a first end of the first cooling chamber at intervals, and the discharge port is disposed at a second end of the second cooling chamber; the first end portion and the second end portion are located on both sides of the partition plate in the arrangement direction of the first cooling chamber and the second cooling chamber, respectively.

In some embodiments of the present application, the injection ports are disposed in one-to-one correspondence with the through holes.

In some embodiments of the present application, the circuit board is electrically connected to the display panel through a flip chip film, where the flip chip film includes a first straight portion, a bent portion, and a second straight portion that are sequentially connected, where the first straight portion at least partially overlaps the display panel, 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 is located on a first side surface perpendicular to a plane where the display panel is located, and the exhaust port and the bent portion are arranged in a dislocation manner on the first side surface; alternatively, the exhaust 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 greater than the size of the discharge port.

The second aspect of the application proposes a vehicle-mounted display module assembly, the vehicle-mounted display module assembly includes a display panel, with the circuit board of display panel electricity connection and include the bearing structure in any embodiment of above-mentioned first aspect, display panel with the circuit board is located respectively bearing structure follows thickness direction's both sides, bearing structure is used for supporting display panel's the back.

In some embodiments of the present application, the injection port communicates with a coolant header of the vehicle through a first coolant sub-line provided with a first control valve; the exhaust port is communicated with a cooling liquid main pipeline of the vehicle through a second cooling liquid sub pipeline, and the second cooling liquid sub pipeline is provided with a second control valve; the first control valve and the second control valve are controlled by a controller of the vehicle based on temperatures of the display panel and the circuit board.

A third aspect of the present application provides a cooling method for a vehicle-mounted display module, which is used for cooling the vehicle-mounted display module in any embodiment of the second aspect, and includes the following steps:

and detecting the actual temperature of the vehicle-mounted display module in real time.

And when the actual temperature exceeds the preset temperature, the controller controls the first control valve to be opened, and the cooling liquid is injected into the cooling chamber through the injection port until the cooling liquid fills the cooling chamber.

After the preset time, the controller controls the second control valve to be opened so as to keep the circulation of the cooling liquid.

And detecting the temperature change rate of the vehicle-mounted display module, and selecting a proper cooling program according to the temperature change rate.

A fourth aspect of the present application provides an in-vehicle display device, including an in-vehicle display module in any one of the embodiments of the second aspect.

The bearing structure that this embodiment provided, bearing structure is used for supporting display panel's the back, bearing structure plays the effect of fixing and support to display panel, display panel and circuit board can produce a large amount of heat at the course of the work, bearing structure and display panel parallel arrangement just are located between display panel and the circuit board, bearing structure and display panel and circuit board's heat transfer area are bigger, the orthographic projection of display panel on bearing structure is located the cooling chamber at least partially, the orthographic projection of circuit board on bearing structure is located the cooling chamber, the heat that display panel and circuit board produced can transmit to bearing structure, the inside cooling chamber that is provided with of bearing structure, the circulation has the coolant in the cooling chamber, the coolant enters into the cooling chamber from the filling port, the coolant absorbs and discharges from the discharge port after the heat that comes by bearing structure both sides circuit board and display panel, reach the purpose for display panel and circuit board cooling, reduce display panel and circuit board appearance temperature overheat's probability for display panel and circuit board all work in the scope that the temperature allows. The working temperatures of the display panel and the circuit board are ensured, so that the service life of the electroluminescent material sensitive to temperature is prolonged, the attenuation of each pixel is more uniform, and the problems of obvious local brightness difference of a screen, display color coordinate deviation and the like can be solved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description will briefly introduce the drawings that are required to be used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other embodiments may also be obtained according to these drawings to those skilled in the art.

FIG. 1 is a cross-sectional view of an overall structure of a vehicle-mounted display module with a supporting structure according to an embodiment of the present application;

FIG. 2 is an enlarged view of a portion of area A of FIG. 1;

FIG. 3 is a schematic view of a structure in which the exhaust port is located on a first side of the support structure according to the embodiment of the present application;

FIG. 4 is a view showing the second cooling chamber filled with cooling fluid when the exhaust port is located on the second side of the support structure according to the embodiment of the present application;

FIG. 5 is a view showing the cooling chamber filled with cooling fluid when the exhaust port is on the second side of the support structure according to the embodiment of the present application;

FIG. 6 is a view of a portion of a coolant being discharged with the discharge port on the second side of the support structure according to the embodiment of the present application;

fig. 7 is a state diagram of the cooling liquid being completely discharged when the discharge port is located on the second side in the support structure according to the embodiment of the present application.

The reference numerals are as follows:

region a, display panel 10, flip chip film 20, first straight portion 21, bent portion 22, second straight portion 23, circuit board 30, polarizer 50, touch layer 60, glass cover plate 70, optical adhesive 80, foam adhesive 90;

the support structure 100, the first side 110, the second side 120, the cooling chamber 200, the first cooling chamber 210, the second cooling chamber 220, the injection port 230, the discharge port 240, the cooling liquid 300, the partition 400, the through hole 410, the first spacing L, the second spacing t, the wall thickness g, the first diameter D, the second diameter D.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. Based on the embodiments herein, a person of ordinary skill in the art would be able to obtain all other embodiments based on the disclosure herein, which are within the scope of the disclosure herein.

As shown in fig. 1 to 5, the first aspect of the present application proposes a supporting structure 100, wherein the supporting structure 100 is used for supporting the back surface of a display panel 10, the display panel 10 is electrically connected with a circuit board 30, and the circuit board 30 and the display panel 10 are respectively located at two sides of the supporting structure 100 along the thickness direction of the supporting structure 100; the support structure 100 is provided with a cooling chamber 200 therein, and a cooling liquid 300 is circulated in the cooling chamber 200, and the cooling chamber 200 includes at least one injection port 230 and at least one discharge port 240, and the cooling liquid 300 enters through the injection port 230 and flows out through the discharge port 240. The cooling chamber 200 is arranged parallel to the display panel 10, and the front projection of the display panel 10 on the support structure 100 is at least partially located in the cooling chamber 200, and the front projection of the circuit board 30 on the support structure 100 is located in the cooling chamber 200.

In this embodiment, the display panel 10 includes a light-emitting surface and a back surface which are oppositely disposed, the support structure 100 is used for supporting the back surface of the display panel 10, the support structure 100 plays a role in fixing and supporting the display panel 10, the display panel 10 and the circuit board 30 generate a large amount of heat in the working process, the support structure 100 is disposed parallel to the display panel 10 and 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 orthographic projection of the circuit board 30 on the support structure 100 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 cooling chamber 200 is disposed in the support structure 100, the cooling chamber 200 is circulated in the cooling chamber 200, the cooling liquid 300 enters the cooling chamber 200 from the injection port 230, and the cooling liquid 300 absorbs the heat transferred by the circuit board 30 and the circuit board 10 on both sides of the support structure 100 and is discharged from the discharge port 240, so as to achieve the purposes of cooling the display panel 10 and the circuit board 30, and reducing the probability of the display panel 10 and the temperature of the circuit board 30 and the temperature within the range of the display panel 30. The working temperatures of the display panel 10 and the circuit board 30 are ensured, so that the service life of the electroluminescent material sensitive to temperature is prolonged, the attenuation of each pixel is more uniform, and the problems of obvious local brightness difference, display color coordinate deviation and the like of a screen can be improved.

As shown in fig. 3, in some embodiments, the cooling chamber 200 includes a partition 400, the partition 400 dividing the cooling chamber 200 into the first cooling chamber 210 and the second cooling chamber 220, the partition 400 being provided with a plurality of through holes 410 at intervals to allow the first cooling chamber 210 and the second cooling chamber 220 to communicate; the inlet 230 is disposed in the first cooling chamber 210, and the outlet 240 is disposed in the second cooling chamber 220, wherein the orthographic projection of the circuit board 30 on the support structure 100 is disposed in the second cooling chamber 220, i.e. the position of the circuit board 30 is opposite to the position of the second cooling chamber 220.

In the present embodiment, the partition 400 divides the cooling chamber 200 into the first cooling chamber 210 and the second cooling chamber 220, and the injection port 230 and the discharge port 240 are provided in the first cooling chamber 210 and the second cooling chamber 220, respectively, that is, the cooling liquid 300 is introduced into the first cooling chamber 210 from the injection port 230, then introduced into the second cooling chamber 220 through the through hole 410, and discharged from the discharge port 240 provided in the second cooling chamber 220. That is, the cooling liquid 300 must pass through the first cooling chamber 210 and the second cooling chamber 220 from the time of entering the cooling chamber 200 to the time of exiting the cooling chamber 200, so that the uneven flow of the cooling liquid 300 in the cooling chamber 200 is reduced, and the uneven cooling of the display panel 10 and the circuit board 30 by the support structure 100 is prevented from causing local overheating. The number of the circuit boards 30 may be one or more, and the cooling structure 100 may cool one or more circuit boards 30.

It will be appreciated that the support structure 100 may be used for a vehicle-mounted display module, and may also be used for a display module of a display device such as a liquid crystal television, a tablet, a mobile phone, etc., when the support structure 100 is used for a vehicle-mounted display module, the vehicle-mounted display module is generally vertically placed for convenient viewing by a driver, that is, the vehicle-mounted display module is perpendicular to the ground or is inclined at a certain angle with respect to the ground, and likewise, the support structure 100 is also vertically placed, and the support structure 100 is perpendicular to the ground or is inclined at a certain angle with respect to the ground. When the vehicle-mounted display module is vertically placed, the above-mentioned partition 400 is provided such that the first cooling chamber 210 and the second cooling chamber 220 may be disposed up and down, as shown in fig. 4, the cooling liquid 300 enters the first cooling chamber 210 from the injection port 230, and the second cooling chamber 220 is preferentially filled with the cooling liquid 300 through the through hole 410 due to the gravity factor because the second cooling chamber 220 is located at the bottom of the first cooling chamber 210. Therefore, the circuit board 30 opposite to the position of the second cooling chamber 220 can be preferentially cooled down, and the temperature of the position of the circuit board 30 can be reduced.

It will be appreciated that the second cooling chamber 220 is preferably filled with the cooling fluid 300, and the first cooling chamber 210 is refilled after the second cooling chamber 220 is filled with the cooling fluid 300. In this process, the temperature of the cooling liquid 300 in the second cooling chamber 220 is higher than that of the cooling liquid 300 in the first cooling chamber 210 due to the absorption of the heat of the circuit board 30, the discharge outlet 240 is disposed in the second cooling chamber 220, the discharge outlet 240 preferentially discharges the cooling liquid 300 with higher temperature in the second cooling chamber 220, and the cooling liquid 300 with lower temperature in the cavity of the first cooling chamber 210 enters the second cooling chamber 220 through the through hole 410 to continue to perform secondary cooling for the position of the circuit board 30, which is beneficial to solving the problem of uneven temperature of the display module, and effectively helps to cool the display module.

Further, as shown in fig. 3, the bottom side of the circuit board 30 is flush with the bottom side of the second cooling chamber 220, i.e., the circuit board 30 is located at the lowermost portion of the second cooling chamber 220. When the support structure is used for the vertically placed vehicle-mounted display module, as shown in fig. 4, the cooling liquid 300 can reach the bottom of the second cooling chamber 220 first due to gravity, and gradually fills from the bottom of the second cooling chamber 220 to the top, and the bottom edge of the circuit board 30 is arranged at the position flush with the bottom edge of the second cooling chamber 220, so that the cooling liquid 300 absorbs the heat of the circuit board 30 first, and a better cooling effect can be achieved.

In some embodiments, as shown in fig. 3, the cooling chamber 200 includes a plurality of injection ports 230 and a plurality of discharge ports 240, the plurality of injection ports 230 being disposed at a first end of the first cooling chamber 210 at intervals, the discharge ports 240 being disposed at a second end of the second cooling chamber 220; the first end and the second end are located at both sides of the partition 400 in the arrangement direction of the first cooling chamber 210 and the second cooling chamber 220, respectively.

In the present embodiment, the provision of the plurality of injection ports 230 and the plurality of discharge ports 240 can enhance the flow rate of the cooling liquid 300, including the rate at which the cooling liquid 300 fills the cooling chamber 200 and the rate at which the cooling chamber 200 is discharged, thereby improving the cooling efficiency. The plurality of injection ports 230 are spaced apart, so that the coolant 300 can be rapidly distributed to each region of the cooling chamber 200 when entering the cooling chamber 200 from the injection ports 230, thereby preventing overheating of the region where the coolant 300 reaches. The plurality of discharge ports 240 are provided in order to rapidly discharge the coolant 300 having absorbed heat from the plurality of discharge ports 240, so that the coolant 300 having a low temperature is introduced into the cooling chamber 200 through the injection port 230, thereby enhancing the cooling effect.

The first and second ends are located at both sides of the partition 400 in the arrangement direction of the first and second cooling chambers 210 and 220, respectively, that is, the positions of the injection port 230 at the first end and the discharge port 240 at the second end are relatively far to ensure that the cooling liquid 300 can flow a longer distance in the cooling chamber 200 and that the cooling liquid 300 can sufficiently absorb heat of the display panel 10 and the circuit board 30. Preferably, when the support structure 100 is vertically placed, the plurality of injection ports 230 are disposed at intervals on the top of the first cooling chamber 210, and the exhaust port 240 is disposed on the bottom of the second cooling chamber 220.

In some embodiments, as shown in FIG. 3, the first spacing L between adjacent injection ports 230 is 80-120mm, and may specifically be 80mm, 90mm, 100mm, 110mm, 120mm. The specific selection of the first interval L may be selected according to the size of the display panel 10 and the number of injection ports 230.

In some embodiments, as shown in FIG. 3, the second spacing t of adjacent vents 240 is 60-100mm, which may be 60mm, 70mm, 80mm, 90mm, 100mm in particular. The specific selection of the second interval t may be selected according to the size of the display panel 10 and the number of the discharge ports 240.

In some embodiments, as shown in fig. 3, the injection ports 230 are disposed in one-to-one correspondence with the through holes 410.

The injection ports 230 are arranged in one-to-one correspondence with the through holes 410, and the cooling liquid 300 enters the first cooling chamber 210 from the injection ports 230 and enters the second cooling chamber 220 through the through holes 410, so that the cooling liquid 300 can flow into the second cooling chamber 220 at the shortest distance to cool the position of the circuit board 30, overheat of the circuit board 30 is prevented, and the cooling efficiency is improved.

In some embodiments, as shown in fig. 1 and 3, the circuit board 30 is electrically connected to the display panel 10 through the flip chip film 20, the flip chip 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 the display panel 10, the second straight portion 23 at least partially overlaps the circuit board 30, the bent portion 22 is located on the support structure 100 forming the second cooling chamber 220 and is located on the first side 110 perpendicular to the plane of the display panel 10, and the exhaust outlet 240 and the bent portion 22 are arranged in a staggered manner on the first side 110; alternatively, the exhaust 240 is located on the second side 120 of the support structure 100 forming the second cooling chamber 220, the second side 120 being disposed adjacent or opposite the first side 110.

In this embodiment, the first flat portion 21 at least partially overlaps the display panel 10, the second flat portion 23 at least partially overlaps the circuit board 30, the first flat portion 21 and the second flat portion 23 are connected by the bending portion 22, the second cooling chamber 220 is in the supporting structure 100, and the supporting structure 100 is used for each side wall of the second cooling chamber 220. It is understood that the inlet 230 and the 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 forming the second cooling chamber 220, and the bent portion 22 is located on the first side 110 perpendicular to the plane in which the display panel 10 is located, that is, the side of the bent portion 22 in the thickness direction of the support structure 100. The exhaust ports 240 and the bending portion 22 are arranged in a staggered manner on the first side 110 to prevent mutual interference, and further, when a plurality of exhaust ports 240 are arranged, the exhaust ports 240 are arranged at intervals, and the flip-chip film 20 is arranged between two adjacent exhaust ports 240, so that the space arrangement of the display modules is optimized. Alternatively, the exhaust 240 is located on the second side 120 of the support structure 100 forming the second cooling chamber 220, the second side 120 being disposed adjacent or opposite the first side 110. That is, the flip-chip film 20 and the discharge opening 240 are not on the same side in the thickness direction of the support structure 100, and thus, there is no mutual interference between the flip-chip film 20 and the discharge opening 240, and the position design can be more flexible.

In some embodiments, the size of the injection port 230 is greater than the size of the discharge port 240.

In the present embodiment, when the temperature of the display panel 10 and the circuit board 30 is overheated, the injection and the discharge of the cooling liquid 300 are simultaneously performed, and the circulation speed of the cooling liquid 300 is accelerated, and in this cooling process, since the size of the injection port 230 is larger than the size of the discharge port 240, that is, the injection speed of the cooling liquid 300 into the cooling chamber 200 is larger than the discharge speed of the cooling liquid 300, it is possible to ensure that the cooling chamber 200 is always filled with the cooling liquid 300, and the cooling effect of the support structure 100 is enhanced.

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

In this embodiment, the first diameter D of the injection port 230 may be 15-30mm, specifically 15mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, and the second diameter D of the discharge port 240 may be 10-20mm, specifically 10mm, 13mm, 15mm, 18mm, 20mm, and it may be preferable 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 is equal to the second diameter D of the discharge port 240 in the combination of the first diameter D of the injection port 230 and the second diameter D of the discharge port 240.

In some embodiments, the support structure 100 is preferably a support plate made of metal, the support structure 100 is attached to the back of the display panel 10, and the support structure 100 is adhered to the display panel 10 through heat-conducting glue.

In this embodiment, the supporting structure 100 is preferably made of a metal material, and may be iron or aluminum, and the metal material has better structural strength and heat conductivity. The display panel 10 has a plate-like structure, and the support structure 100 is preferably attached to the display panel 10, so that the heat exchange area is maximized and the cooling effect is enhanced.

As shown in FIG. 3, the wall thickness g between the outer side wall of the display panel 10 and the cooling chamber 200 is preferably 10-20mm, and may be specifically 10mm, 15mm or 20mm, wherein a wall thickness g greater than 10mm ensures the mechanical strength of the support structure 100, and a wall thickness g smaller than 20mm avoids lower heat exchange efficiency between the cooling liquid 300 and the circuit board 30 and the display panel 10.

The second aspect of the present application proposes a vehicle-mounted display module, as shown in fig. 1 and 2, 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 of the embodiments of the first aspect, where the display panel 10 and the circuit board 30 are respectively located on two sides of the support structure 100 along a thickness direction, and the support structure 100 is used for supporting a back surface of the display panel 10.

In this embodiment, the supporting structure 100 is used for supporting the back of the display panel 10, the supporting structure 100 plays a role in fixing and supporting the display panel 10, the circuit board 30 and the supporting structure 100 together form a vehicle-mounted display module, the display panel 10 and the circuit board 30 generate a large amount of heat in the working process, the supporting structure 100 is arranged parallel to the display panel 10 and between the display panel 10 and the circuit board 30, the heat exchange area between the supporting structure 100 and the display panel 10 and the circuit board 30 is larger, the orthographic projection of the display panel 10 on the supporting structure 100 is at least partially located in the cooling chamber 200, the orthographic projection of the circuit board 30 on the supporting structure 100 is located in the cooling chamber 200, the heat generated by the display panel 10 and the circuit board 30 can be transferred to the supporting structure 100, the cooling chamber 200 is arranged in the supporting structure 100, the cooling chamber 200 is circulated with the cooling liquid 300, the cooling liquid 300 enters the cooling chamber 200 from the injection port 230, and the cooling liquid 300 absorbs the heat transferred by the circuit board 30 and the display panel 10 on both sides of the supporting structure 100 and then is discharged from the discharge port 240, thereby achieving the purposes of reducing the probability of cooling the display panel 10 and the circuit board 30 and reducing the temperature of the display panel 30 and the temperature in the cooling panel 30, and allowing the temperature range to be within the cooling panel 30. The working temperatures of the display panel 10 and the circuit board 30 are ensured, so that the service life of the electroluminescent material sensitive to temperature is prolonged, the attenuation of each pixel is more uniform, and the problems of obvious local brightness difference, display color coordinate deviation and the like of a screen can be improved.

In some embodiments, the injection port 230 communicates with the vehicle's coolant header through a first coolant sub-line provided with a first control valve; the exhaust outlet 240 is communicated with a cooling liquid main pipeline of the vehicle through a second cooling liquid sub pipeline, and the second cooling liquid sub pipeline is provided with a second control valve; the first control valve and the second control valve are controlled by a controller of the vehicle based on the temperatures of the display panel 10 and the circuit board 30.

In this embodiment, the injection port 230 of the support structure 100 of the vehicle-mounted display module is communicated with the cooling liquid main pipe of the vehicle through the first cooling liquid sub-pipe, and the cooling liquid 300 of the vehicle enters the cooling chamber 200 through the injection port 230 after entering the first cooling liquid sub-pipe through the cooling liquid main pipe. The first coolant sub-pipe is provided with a first control valve controlling the input of the coolant 300 to the cooling chamber 200 and stopping the input of the coolant 300. The discharge port 240 communicates with a coolant header pipe of the vehicle through a second coolant sub-pipe, to which the coolant 300 in the cooling chamber 200 is discharged from the discharge port 240, the second coolant sub-pipe being provided with a second control valve that controls discharge or stop discharge of the coolant 300 in the cooling chamber 200.

In some embodiments, as shown in fig. 2, the vehicle-mounted display module further includes a polarizer 50, a touch layer 60, and a glass cover plate 70 disposed on one side of the light-emitting surface of the display panel 10 in sequence along a direction away from the surface of the display panel 10, and two sides of the touch layer 60 are respectively bonded to the polarizer 50 and the glass cover plate 70 through optical adhesive 80.

In some embodiments, as shown in fig. 1, in the vehicle-mounted display module, the foam rubber 90 is disposed on a side of the support structure 100 away from the display panel 10, the foam rubber 90 is disposed on two sides of the circuit board 30, the circuit board 30 is fixed on the back of the support structure 100, the flip chip film 20 is located on a side of the foam rubber 90 away from the support structure 100, and the foam rubber 90 can play a good supporting role on the flip chip film 20, so that the flip chip film 20 is prevented from being in a suspended state, and meanwhile, the flip chip film 30 is also supported well.

A third aspect of the present application provides a cooling method for a vehicle-mounted display module, which is used for cooling the vehicle-mounted display module in any embodiment of the second aspect, and includes the following steps:

s1, detecting the actual temperature of the vehicle-mounted display module in real time.

S2, when the actual temperature exceeds the preset temperature, the controller controls the first control valve to open, and the cooling liquid 300 is injected into the cooling chamber 200 through the injection port 230 until the cooling liquid 300 fills the cooling chamber 200.

And S3, after the preset time, the controller controls the second control valve to be opened so as to keep the circulation of the cooling liquid 300.

S4, detecting the temperature change rate of the vehicle-mounted display module, and selecting a proper cooling program according to the temperature change rate.

In this embodiment, the actual temperature of the vehicle-mounted display module is detected in real time, including the temperature of the display panel 10 and the temperature of the circuit board 30, when the actual temperature exceeds the preset temperature, the controller controls the first control valve to open, and the cooling liquid 300 is injected into the cooling chamber 200 through the injection port 230 until the cooling chamber 200 is fully filled with the cooling liquid 300, and after a preset time, preferably after the cooling liquid 300 is fully filled with the cooling chamber 200, the controller controls the second control valve to open, so as to keep the circulation of the cooling liquid 300 and continuously cool the vehicle-mounted display module. And the temperature detection element detects the temperature change rate of the vehicle-mounted display module, and selects a proper cooling program according to the temperature change rate.

The controller controls the opening and closing of the first control valve and the second control valve according to the temperature is not limited to the above-described 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 the preset temperature, the first control valve and the second control valve are controlled to be opened simultaneously, and the cooling liquid 300 flows into the cooling chamber 200 from the injection port 230 and then flows out from the discharge port 240, so that the circulation state of the cooling liquid 300 is maintained, and cooling is accelerated.

Preferably, when the detected temperature of the display panel 10 or the circuit board 30 is higher than a preset temperature, as shown in fig. 4, the first control valve is opened and the second control valve is closed, and the cooling liquid 300 is injected into the cooling chamber 200, and the cooling liquid 300 preferentially fills the second cooling chamber 220 due to gravity. After the cooling liquid 300 fills the first cooling chamber 210 and the second cooling chamber 220 and the cooling liquid 300 fully absorbs heat of the circuit board 30 and the display panel 10, the second control valve is opened, as shown in fig. 6, since the exhaust 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, and since the temperature of the position of the circuit board 30 is higher, the temperature of the cooling liquid 300 in the second cooling chamber 220 is higher than that of the cooling liquid 300 in the first cooling chamber 210, the exhaust port 240 preferentially discharges the cooling liquid 300 in the second cooling chamber 220 with higher temperature, at this time, the cooling liquid with lower temperature in the first cooling chamber 210 enters the second cooling chamber 220 through the through hole to cool down again at the position of the circuit board 30, and finally, the cooling liquid 300 is completely discharged from the exhaust port 240 to be in the state as shown in fig. 7.

A fourth aspect of the present application provides an in-vehicle display device, including an in-vehicle display module in any one of the embodiments of the second aspect.

In this embodiment, the vehicle-mounted display module in the vehicle-mounted display device includes the support structure 100 in any one of the embodiments described above, the support structure 100 is used for supporting the back of the display panel 10, the support structure 100 plays a role in fixing and supporting the display panel 10, the circuit board 30 and the support structure 100 together form the vehicle-mounted display module, a large amount of heat can be generated in the working process of the display panel 10 and the circuit board 30, the support structure 100 is arranged in parallel with 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 is larger, the orthographic projection of the display panel 10 on the support structure 100 is located in the cooling chamber 200, the orthographic projection of the circuit board 30 on the support structure 100 is located in the cooling chamber 200, the heat generated by the display panel 10 and the circuit board 30 can be transferred to the support structure 100, the cooling chamber 200 is arranged in the support structure 100, the cooling chamber 200 is circulated with the cooling liquid 300, the cooling liquid 300 enters the cooling chamber 200 from 230, the cooling liquid 300 absorbs the heat transferred from the circuit board 30 and the circuit board 30 at both sides of the support structure 100 and the display panel 10, the heat transferred from the circuit board 30 and the display panel 10 is discharged from the cooling chamber 10, the cooling liquid 30 reaches the cooling chamber 30 and the cooling chamber 30, the cooling window is cooled in the cooling window 30, and the cooling window is reached, the temperature window is reached, and the cooling window is reached, the temperature window is reached at the cooling window 30 is reached, and the temperature window is reached at the cooling window is reached, and the temperature is reached at the cooling window is reached at the temperature window is 30 is reached at the temperature is cooled temperature is 30 is cooled temperature is cooled. The working temperatures of the display panel 10 and the circuit board 30 are ensured, so that the service life of the electroluminescent material sensitive to temperature is prolonged, the attenuation of each pixel is more uniform, and the problems of obvious local brightness difference, display color coordinate deviation and the like of a screen can be improved.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

In this specification, each embodiment is described in a related manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.

The foregoing is merely a preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modifications, equivalent substitutions, improvements, etc. that are within the spirit and principles of the present application are intended to be included within the scope of the present application.

Claims (10)

1. The supporting structure is used for supporting the back surface of a display panel, the display panel is electrically connected with a circuit board, and the circuit board and the display panel are respectively positioned at two sides of the supporting structure along the thickness direction of the supporting structure;

a cooling chamber is arranged in the supporting structure, cooling liquid flows in the cooling chamber, the cooling chamber comprises at least one injection port and at least one discharge port, and the cooling liquid enters from the injection port and flows out from the discharge port;

the cooling chamber is arranged in parallel with the display panel, the orthographic projection of the display panel on the supporting structure is at least partially positioned in the cooling chamber, and the orthographic projection of the circuit board on the supporting structure is positioned in the cooling chamber.

2. The support structure of claim 1, wherein the cooling chamber comprises a partition dividing the cooling chamber into a first cooling chamber and a second cooling chamber, the partition being provided with a plurality of through holes at intervals to allow the first cooling chamber and the second cooling chamber to communicate;

the injection port is arranged in the first cooling chamber, the discharge port is arranged in the second cooling chamber, and the orthographic projection of the circuit board on the supporting structure is positioned in the second cooling chamber.

3. The support structure of claim 2, wherein the cooling chamber comprises a plurality of the injection ports and a plurality of the exhaust ports, the plurality of injection ports being spaced at a first end of the first cooling chamber and the exhaust ports being disposed at a second end of the second cooling chamber;

the first end portion and the second end portion are located on both sides of the partition plate in the arrangement direction of the first cooling chamber and the second cooling chamber, respectively.

4. The support structure of claim 2, wherein the injection ports are disposed in one-to-one correspondence with the through holes.

5. The support structure according to any one of claims 2 to 4, wherein the circuit board and the display panel are electrically connected by a flip chip film, the flip chip film includes 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, 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 is located on a first side perpendicular to a plane on which the display panel is located, and the discharge port and the bent portion are arranged in a staggered manner on the first side; or alternatively, the process may be performed,

the exhaust 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.

6. The support structure of any one of claims 1-4, wherein the size of the injection port is greater than the size of the discharge port.

7. The vehicle-mounted display module is characterized by comprising a display panel, a circuit board electrically connected with the display panel and the support structure according to any one of claims 1-6, wherein the display panel and the circuit board are respectively positioned on two sides of the support structure along the thickness direction, and the support structure is used for supporting the back surface of the display panel.

8. The vehicle-mounted display module assembly of claim 7, wherein the injection port is in communication with a coolant header of the vehicle through a first coolant sub-line, the first coolant sub-line being provided with a first control valve; the exhaust port is communicated with a cooling liquid main pipeline of the vehicle through a second cooling liquid sub pipeline, and the second cooling liquid sub pipeline is provided with a second control valve;

the first control valve and the second control valve are controlled by a controller of the vehicle based on temperatures of the display panel and the circuit board.

9. A cooling method of a vehicle-mounted display module set for cooling the vehicle-mounted display module set as claimed in claim 7 or 8, comprising the steps of:

detecting the actual temperature of the vehicle-mounted display module in real time;

when the actual temperature exceeds a preset temperature, the controller controls the first control valve to be opened, and the cooling liquid is injected into the cooling chamber through the injection port until the cooling liquid fills the cooling chamber;

after a preset time, the controller controls the second control valve to be opened so as to keep the circulation of the cooling liquid;

and detecting the temperature change rate of the vehicle-mounted display module, and selecting a proper cooling program according to the temperature change rate.

10. An in-vehicle display apparatus comprising the in-vehicle display module set as claimed in claim 7 or 8.

Images