Display device, HUD device, and automobile

Abstract

The invention provides a display device which comprises a light-emitting device, a display module and a heat dissipation assembly, the light-emitting device is used for emitting illumination light, the display module is used for receiving the illumination light and modulating the illumination light to form image light, the heat dissipation assembly comprises a cooling plate and a radiator, the cooling plate comprises an outer frame and a transparent window, and the transparent window is filled with a light-permeable liquid medium. The transparent window is attached to the surface of one side of the display module, and the radiator is connected with the cooling plate so as to exchange heat with the cooling plate. The light-emitting device emits illumination light, and the display module receives the illumination light and modulates image light. The display module works to generate heat, and the transparent window of the cooling plate is attached to the surface of the display module. The liquid medium flows through the transparent window and exchanges heat with the display module, and heat of the display module is absorbed by the liquid medium. The liquid medium which absorbs the heat flows to the radiator, and the heat is transferred to the external environment through the radiator. And the use temperature of the display device is reduced. The invention further provides an HUD device and an automobile.

Description

Technical Field

[0001] The present application relates to the technical field of display equipment, and in particular to a display device, a HUD device and a car. Background Art

[0002] Nowadays, in order to improve driving safety, the front windshield of the car is equipped with a head-up display. Head-up display (HUD) refers to a driver-centric, blind-operated, multi-functional instrument panel. Its function is to project important driving information such as speed and navigation onto the windshield in front of the driver, so that the driver can see important driving information such as speed and navigation without lowering his head or turning his head as much as possible, without taking his eyes off the front of the car, thus improving driving safety.

[0003] The HUD device usually includes a display device. When the display device works for a long time, it may generate a lot of heat. If the heat is not dissipated in time, it may accumulate in the display device, thereby affecting the normal operation of the display device. What's worse, it may damage the components inside the display device. Summary of the invention

[0004] The present application proposes a display device, a HUD device and a car to at least partially improve the above technical problems.

[0005] In a first aspect, the present application provides a display device, comprising a light-emitting device, a display module and a heat dissipation component, wherein the light-emitting device is used to emit illumination light, the display module is used to receive the illumination light and modulate it to form image light, the heat dissipation component comprises a cooling plate and a radiator, the cooling plate comprises an outer frame and a transparent window, the transparent window is filled with a light-transmissive liquid medium, the transparent window is attached to one side surface of the display module, and the radiator is connected to the cooling plate to exchange heat with the cooling plate.

[0006] In one embodiment, the cooling plate is attached to the light incident surface of the display module.

[0007] In one embodiment, the cooling plate is attached to the light emitting surface of the display module.

[0008] In one embodiment, the transparent window includes a first transparent glass and a second transparent glass, the first transparent glass and the second transparent glass are fixed to an outer frame, the first transparent glass and the second transparent glass are relatively spaced apart, and a liquid medium is filled between the first transparent glass and the second transparent glass.

[0009] In one embodiment, the refractive index of the first transparent glass and the second transparent glass is 1.5-1.8.

[0010] In one embodiment, the refractive index of the liquid medium is 1.33-1.43.

[0011] In one embodiment, the liquid medium includes water and ethylene glycol.

[0012] In one embodiment, the volume ratio of ethylene glycol to water is 1-1.5.

[0013] In one embodiment, a hydrophilic film is provided on a surface of the first transparent glass facing the second transparent glass and / or a surface of the second transparent glass facing the first transparent glass.

[0014] In one embodiment, an infrared filter film is provided on the light emitting surface of the cooling plate.

[0015] In one embodiment, the heat dissipation component also includes a pipe, a pump body and a liquid replenishing tank. A liquid channel is formed in the radiator, and the cooling plate is provided with a liquid inlet and a liquid outlet. The two ends of the liquid channel are connected to the liquid inlet and the liquid outlet through pipes to form a cooling circuit. The pump body and the liquid replenishing tank are arranged on the cooling circuit.

[0016] In one embodiment, the liquid inlet is located below the liquid outlet.

[0017] In one embodiment, the liquid replenishing tank is arranged at the liquid outlet, and the liquid replenishing tank is provided with an exhaust valve and a filtering device.

[0018] In one embodiment, the light-emitting device includes a shell, a light source and a reflector, the light source and the reflector are arranged in the shell, the display module and the cooling plate are fixed to the shell, the light source is used to emit illumination light, the reflector is arranged on the optical path of the illumination light, and is used to reflect the illumination light into the display module.

[0019] In one embodiment, the heat sink is disposed on the housing and is located on a side of the light source away from the reflector.

[0020] In one embodiment, the heat dissipation assembly further includes a fan, which is disposed on a side of the heat sink away from the light source, and is used to blow air toward the heat sink and the light source.

[0021] In one embodiment, the light emitting device further comprises an elastic member, which is disposed on the housing and presses the cooling plate against the surface of the display module.

[0022] In a second aspect, the present application provides a HUD device, comprising a display device as described in the first aspect above, a curved mirror and a reflector, wherein the curved mirror is used to receive and reflect image light emitted by the display device, and the reflector is used to deflect the reflected image light to form an image on a projection surface.

[0023] In a third aspect, the present application provides a car, comprising a HUD device as described in the second aspect above.

[0024] The display device, HUD device and automobile provided by the present application, the light emitting device emits illumination light, the display module receives the illumination light and modulates the image light. The display module generates heat when it works, and the transparent window of the cooling plate is attached to the surface of the display module. The liquid medium flows through the transparent window and exchanges heat with the display module, and the heat of the display module is absorbed by the liquid medium. The liquid medium that has absorbed the heat flows to the radiator, and transfers the heat to the external environment through the radiator. The operating temperature of the display device is reduced, and the service life of the display device is increased.

[0025] In a HUD device using the above display device, the curved mirror and the reflector may reflect sunlight from the outside to the display module, causing the temperature of the display module to rise. The temperature of the display module can be lowered by a cooling plate, thereby ensuring the safe use of the display module, ensuring that the HUD device projects images normally, and ensuring safe driving of the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the implementation modes of the present application, the drawings required for use in the description of the implementation modes will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic diagram of the structure of a car proposed in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of the structure of a display device proposed in an embodiment of the present application;

[0029] Figure 3 A schematic diagram of an exploded structure of a display device proposed in an embodiment of the present application;

[0030] Figure 4 A schematic diagram of the structure of a cooling circuit proposed in an embodiment of the present application;

[0031] Figure 5 A schematic diagram of the structure of an elastic member and a cooling plate proposed in an embodiment of the present application;

[0032] Figure 6 A schematic diagram of the structure of a radiator proposed in an embodiment of the present application;

[0033] Figure 7 A schematic diagram of the structure of a cooling plate proposed in an embodiment of the present application;

[0034] Figure 8 A schematic diagram of the structure of a liquid replenishment tank proposed in an embodiment of the present application;

[0035] Fig. 9This is a schematic diagram of the exploded structure of another display device proposed in an embodiment of the present application.

[0036] Figure numerals: HUD device 100, display device 10, light emitting device 11, shell 111, light source 112, reflector 113, elastic member 114, mounting groove 115, display module 12, frame 121, elastic pressure claw 122, diffusion membrane 123, heat dissipation component 13, cooling plate 131, liquid inlet 1311, liquid outlet 1312, radiator 132, liquid channel 1321, cooling circuit 1322, fan 1323, substrate 1324, heat dissipation fins 1325, outer frame 133, connecting hole 1331, transparent window 134, first transparent glass 135, second transparent glass 136, pipeline 137, pump body 138, liquid replenishing tank 139, inlet 1391, outlet 1392, filter device 1393, exhaust valve 1394, curved mirror 20, reflector 30, automobile 200. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the implementation mode of the present application. Obviously, the described implementation mode is only a part of the implementation mode of the present application, not all the implementation modes. Based on the implementation mode in the present application, all other implementation modes obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0038] In this application, unless otherwise clearly specified or limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements, or it can be only surface contact, or surface contact connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] In addition, the terms "first", "second", etc. are only used to distinguish descriptions and cannot be understood as specific or special structures. The descriptions of the terms "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0040] Example

[0041] The present application provides a vehicle 200, see Figure 1 The automobile 200 may include a HUD device 100, which may obtain relevant parameter information and display it in the form of image light. The relevant parameter information includes the speed of the automobile 200, the state of the automobile 200, navigation information, etc. In one embodiment, the HUD device 100 may be arranged on the driving platform, and the HUD device 100 may emit image light toward the front windshield, and the image light is projected on the front windshield to present a virtual image. The driver may obtain parameter information, navigation information, etc. of the automobile 200 through the front windshield, so as to facilitate subsequent driving and improve driving safety.

[0042] It is understandable that the position, brightness, etc. of the image light emitted by the HUD device 100 can be adjusted to facilitate observation by the driver.

[0043] Please continue reading Figure 1 , the HUD device 100 may include a display device 10, a curved mirror 20 and a reflector 30. The display device 10 may obtain relevant information and convert it into image light for emission. The curved mirror 20 may be located on the optical path of the image light emitted by the display device 10. The curved mirror 20 is used to receive and reflect the image light emitted by the display device 10. In one embodiment, the curved mirror 20 can not only reflect the image light, but also adjust the size of the light field of the image light according to the size parameters of the reflector 30. Exemplarily, the image light is emitted from the display device 10 to the curved mirror 20. The beam of the image light may be a wide beam. The curved mirror 20 may be a concave mirror. Within a certain range, the beam is gathered and propagated to the reflector 30. The reflector 30 is used to deflect the reflected image light to form an image on the projection surface. In one embodiment, the projection surface may be a partial area of ​​the front windshield. The reflector 30 may diffuse the image light, and the image light forms an image on the front windshield.

[0044] It is understandable that the curved mirror 20 can be a convex mirror, a concave mirror, etc., which can be limited according to specific implementation requirements, and this embodiment does not limit it.

[0045] It is understandable that the reflector 30 may be a plane reflector, a convex reflector, a concave reflector, etc., which may be limited according to specific implementation requirements, and this embodiment does not limit it.

[0046] In this embodiment, the display device 10 can also be set on the dashboard, rear seats, etc. of the car 200, so that the display device 10 can be used for driving display of the car 200, or the display device 10 is used for entertainment of rear passengers. And the display device 10 can also be used in other fields, for example, the display device 10 can be applied to wearable devices, etc., which is not limited in this embodiment.

[0047] In this embodiment, please refer to Figure 2 as well as Figure 3 The display device 10 includes a light emitting device 11, a display module 12 and a heat dissipation assembly 13. The light emitting device 11 is used to emit illumination light. The light emitting device 11 can be a light emitting diode (LED) device, a laser device, etc., which can be used to emit fluorescence and laser, respectively. It is understandable that since the laser is a point light source, the light emitting device 11 can also be provided with a diffusion plate, a light pipe and other structures to expand the use of the laser. The light emitting device 11 can be restricted according to the application scenario and use requirements, and this embodiment does not restrict it.

[0048] The display module 12 is used to receive the illumination light and modulate it to form image light. For example, the display module 12 can be a liquid crystal display (LCD). Under the influence of the external electric field, the liquid crystal in the display module 12 will present different arrangements, and the illumination light will be modulated into image light after passing through. It is understandable that the display module 12 can modulate the image light according to relevant parameter information, for example, the illumination light will be presented as the speed of the vehicle after passing through the display module 12.

[0049] The display module 12 generates heat when it is working. The heat accumulation causes the temperature of the display module 12 to rise, affecting the working efficiency of the display module 12. In addition, sunlight in the external environment will be reflected into the display module 12 through the curved mirror 20 or the reflector 30, further increasing the operating temperature of the display module 12. Figure 2 as well as Figure 4The heat dissipation assembly 13 includes a cooling plate 131 and a radiator 132. The radiator 132 is connected to the cooling plate 131, and the radiator 132 and the cooling plate 131 perform heat exchange. For example, the cooling plate 131 and the radiator 132 can transfer heat through a liquid medium. The liquid medium can pass through the cooling plate 131 and absorb the heat in the cooling plate 131. After absorbing the heat, the liquid medium flows to the radiator 132, and the heat is dissipated through the radiator 132 to reduce the temperature of the liquid medium. The liquid medium with the lowered temperature flows back to the cooling plate 131, and the cycle repeats. The operating temperature of the display module 12 is reduced by the heat dissipation assembly 13 to ensure the working efficiency of the display module 12.

[0050] Under the reflection effect of the curved mirror 20 or the reflector 30, the sunlight will be concentrated on the surface of the display module 12 to form a light spot. If the temperature of the light spot is too high, the display module 12 will be burned. Figure 2 In one embodiment, external sunlight and the like will be reflected onto the display module 12 through the curved mirror 20 and / or the reflector 30, further increasing the operating temperature of the display module 12 and affecting the imaging effect of the display module 12. The cooling plate 131 can be attached to the light-emitting surface of the display module 12, and the light-emitting surface of the display module 12 can be the surface of the display module 12 away from the light-emitting device 11. The cooling plate 131 is arranged on the light-emitting side of the display module 12, and the illumination light emitted by the light-emitting device 11 passes through the display module 12 and the cooling plate 131 in sequence. External light must pass through the cooling plate 131 to enter the display module 12, and the energy in the external light can be absorbed by the cooling plate 131, and the heat generated by the operation of the display module 12 can also be absorbed by the cooling plate 131. Avoid external sunlight and the like from directly gathering on the surface of the display module 12, and protect the use safety and work efficiency of the display module 12.

[0051] In a more specific implementation, please continue to refer to Figure 2 as well as Figure 3The cooling plate 131 includes an outer frame 133 and a transparent window 134, the outer frame 133 is arranged around the transparent window 134, and the two are connected to each other. In a more specific embodiment, the transparent window 134 includes a first transparent glass 135 and a second transparent glass 136, the first transparent glass 135 and the second transparent glass 136 are arranged relatively to form the transparent window 134, the first transparent glass 135 and the second transparent glass 136 are both fixed to the outer frame 133, the outer frame 133 is arranged around the outer edge of the first transparent glass 135 and the second transparent glass 136 to form a cavity, and the cavity is filled with a liquid medium. The outer frame 133 can be fixedly connected to the first transparent glass 135 and the second transparent glass 136 to avoid relative displacement between the two, thereby ensuring the structural stability of the cooling plate 131. In addition, the outer frame 133 can be a metal outer frame. For example, the outer frame 133 can be an aluminum alloy outer frame. The metal outer frame has high thermal conductivity and high strength, which can not only have a certain heat dissipation effect, but also resist external impact, further improving the stability of the cooling plate 131.

[0052] In order to reduce the influence of the transparent window 134 on the light, preferably, the transparent window 134 can be made of highly transparent white glass, sapphire glass, or other transparent windows 134 with high thermal conductivity and high transmittance to ensure the imaging effect of the HUD device 100. The transparent window 134 is filled with a light-transmitting liquid medium, and light can pass through the transparent window 134 and the liquid medium in the transparent window 134. Preferably, the transparent window 134 is filled with a liquid medium having a refractive index similar to that of the transparent window 134 itself. Exemplarily, the first transparent glass 135 and the second transparent glass 136 can be made of white glass, and the refractive index of white glass is 1.5-1.8. The liquid medium can be mixed with a mixture of ethylene glycol and water, and ethylene glycol and water can be mixed in different proportions so that the refractive index of the liquid medium is controlled within the range of 1.33-1.43, and the refractive indexes of the two are similar. Moreover, at standard atmospheric pressure, the boiling point of ethylene glycol is 197.3°C and its freezing point is -11.5°C. Ethylene glycol has a certain antifreeze effect, and ethylene glycol is not easy to volatilize when used within 100° C., which improves the stability of the liquid medium and ensures the heat dissipation effect of the heat dissipation component 13.

[0053] See also Figure 2 as well as Figure 5, the light emitting device 11 may further include an elastic member 114, which is disposed on the housing 111 and presses the cooling plate 131 against the surface of the display module 12. In one embodiment, the outer frame 133 may further be provided with a connection hole 1331, and an end of the light emitting device 11 facing the cooling plate 131 may be provided with a mounting hole. The elastic member 114 may be passed through the connection hole 1331 and connected to the mounting hole so that the cooling plate 131 and the light emitting device 11 are relatively fixed. In this embodiment, the elastic member 114 may be a screw with a spring sleeve. The elastic member 114 disposes the display module 12 between the cooling plate 131 and the light emitting device 11, and may also fix the display module 12 between the light emitting device 11 and the cooling plate 131. In some other embodiments, the elastic member 114 may also be a buckle extending toward the display module 12, and the buckle cooperates with the outer edge of the cooling plate 131 to fix the display module 12 and the cooling plate 131 to one side of the housing 111. For example, a mounting groove 115 is provided at one end of the light emitting device 11 facing the cooling plate 131, and the mounting groove 115 is provided corresponding to the display module 12, and the display module 12 is provided in the mounting groove 115. The cooling plate 131 covers and abuts against the display module 12, and the cooling plate 131 is connected to one end of the light emitting device 11 close to the display module 12, and the display module 12 can be fixed between the cooling plate 131 and the display module 12 to ensure that the positions of the light emitting device 11, the display module 12 and the cooling plate 131 are relatively stable. Preferably, the fitting tightness of the cooling plate 131 and the display module 12 can be changed by adjusting the preset torque of the screw, so as to further improve the heat dissipation effect of the cooling plate 131.

[0054] In one embodiment, a diffusion film 123 is disposed on one side of the display module 12 close to the light emitting device 11. The diffusion film 123 is a thin film used to control the diffusion and transmission of substances in the film material. The illumination light will diffuse after passing through the diffusion film 123, so that the light can be more dispersed. In addition, the diffusion film 123 can reduce the reflection of the illumination light on the surface of the display module 12.

[0055] The first transparent glass 135 and the second transparent glass 136 are arranged at a relative interval. In one embodiment, the outer frame 133 may be provided with a mounting portion, and the mounting portion may abut the first transparent glass 135 and the second transparent glass 136 so that the first transparent glass 135 and the second transparent glass 136 have a certain interval. For example, the distance between the first transparent glass 135 and the second transparent glass 136 may be 4 mm. The distance between the first transparent glass 135 and the second transparent glass 136 may be set according to the flow conditions of the liquid medium and the cooling requirements, and may be increased or decreased within a certain range, and the specific range is not limited here. The liquid medium is filled between the first transparent glass 135 and the second transparent glass 136, and the heat is transferred to the first transparent glass 135 and the second transparent glass 136. The liquid medium can absorb heat and reduce the temperature of the first transparent glass 135 and the second transparent glass 136 to achieve heat dissipation for the display module 12. Preferably, a seal is provided between the mounting portion and the first transparent glass 135 and the second transparent glass 136 . The seal may be provided along the outer edges of the first transparent glass 135 and the second transparent glass 136 to improve the sealing performance of the cooling plate 131 .

[0056] In one embodiment, the transparent window 134 can be selected according to the refractive index of the liquid medium. The liquid medium can be composed of ethylene glycol and water in a volume ratio of 1-1.5. For example, the volume ratio of ethylene glycol to water can be 6:4, and its refractive index is about 1.4. The transparent window 134 is selected according to the refractive index, and white glass can be preferably used as the transparent window 134, and the refractive indexes of the two are close. The light is refracted in both the transparent window 134 and the liquid medium, and the refractive indexes of the two are closer, the refraction angle changes less, and the light is not easily distorted.

[0057] In one embodiment, the surface of the first transparent glass 135 facing the second transparent glass 136 and / or the surface of the second transparent glass 136 facing the first transparent glass 135 may also be provided with a hydrophilic film. The hydrophilic film is a thin film material with hydrophilic properties, which can effectively enhance the wettability of the surface. The hydrophilic film can be made of different materials such as polymers, silica gel and nanomaterials. The hydrophilic film can be selected according to specific implementation requirements, and this embodiment is not limited. Specifically, the hydrophilic film can be made of polycarbonate, polyvinyl chloride, polyvinylidene fluoride, polysulfone, polyacrylonitrile, polyamide, polysulfoneamide, sulfonated polysulfone, etc. During the use of the display device 10, the hydrophilic film can make the cold long-term immersion help the surfaces of the first transparent glass 135 and the second transparent glass 136 to react slowly with the liquid medium, and the surface oil residues of the first transparent glass 135 and the second transparent glass 136 can be completely removed, and the surface wettability of the first transparent glass 135 and the second transparent glass 136 can also be improved.

[0058] In one embodiment, to prevent damage caused by the entry of external light, for example, sunlight first enters the display module 12 through the light. The light-emitting surface of the cooling plate 131 may also be provided with an infrared filter film. For example, the light-emitting surface of the cooling plate 131 is coated with an infrared blocking filter film, which can block infrared rays in the 700nm-1050nm band, reduce the power density of sunlight, and greatly reduce the temperature rise effect of the sunlight focusing spot on the liquid crystal.

[0059] The transparent window 134 is attached to one side surface of the display module 12, and the surface heat of the display module 12 is taken away by the liquid medium in the cooling plate 131 and dissipated through the radiator 132, so as to cool the display module 12 and ensure the safe use of the display module 12. In addition, the light can pass through the cooling plate 131 smoothly, reducing the influence on the light and ensuring the imaging effect of the display module 12.

[0060] In a more specific implementation, please continue to refer to Figure 3 , Figure 4 , Figure 6 as well as Figure 7 The heat dissipation assembly 13 further includes a pipe 137, a pump body 138 and a liquid replenishing tank 139. A liquid channel 1321 is formed in the radiator 132. The liquid channel 1321 is bent back and forth, and the liquid medium can flow in the liquid channel 1321. Figure 7 As shown, the cooling plate 131 is provided with a liquid inlet 1311 and a liquid outlet 1312, and the liquid medium flows between the liquid inlet 1311 and the liquid outlet 1312. The two ends of the liquid channel 1321 are connected to the liquid inlet 1311 and the liquid outlet 1312 through the pipeline 137 to form a cooling circuit 1322. The cooling plate 131 and the radiator 132 are connected to each other, and the liquid medium in the liquid channel 1321 can exchange heat with the radiator 132. Figure 7 The outer frame 133 is provided with a liquid inlet channel and a liquid outlet channel, the liquid inlet port 1311 is connected to the liquid inlet channel, the liquid outlet port 1312 is connected to the liquid outlet channel, and the cooling plate 131 includes a receiving cavity, the receiving cavity is used to be filled with a liquid medium, and the liquid medium can exchange heat with the display module 12. The liquid inlet channel and the liquid outlet channel are connected to the receiving cavity through a plurality of small-diameter through holes, so that the liquid medium fills the entire liquid inlet channel, and then slowly enters the receiving cavity through the small-diameter through holes, so as to avoid fluctuations caused by the rapid entry of the liquid medium into the receiving cavity, and ensure the stable flow of the liquid medium.

[0061] Preferably, the liquid medium may be discharged from the liquid outlet 1312 under the influence of gravity, so that the liquid medium and the display module 12 are not completely heat exchanged, resulting in poor heat dissipation effect of the heat dissipation component 13. The liquid inlet 1311 is located below the liquid outlet 1312. In this way, the liquid medium will gradually fill the entire cooling plate 131. The liquid medium can absorb the heat transferred from the display module 12 to various parts of the cooling plate 131, thereby improving the cooling effect of the liquid medium. The cooling plate 131 can always be filled with liquid medium to avoid residual air in the cooling plate 131, which causes the light to be refracted through the cooling plate 131.

[0062] See also Figure 3 as well as Figure 8 , the liquid medium will produce loss during the flow process, and residual air may appear in the liquid medium, which will affect the smooth operation of the pump body 138 and the like. The liquid replenishing tank 139 is arranged on the cooling circuit 1322, and the liquid replenishing tank 139 is arranged at the liquid outlet 1312 of the cooling plate 131. Under the influence of buoyancy, the residual air in the cooling plate 131 gathers above the cooling plate 131. The liquid replenishing tank 139 is connected to the liquid outlet 1312, and the liquid outlet 1312 is located above the cooling plate 131. The residual air will be discharged from the cooling plate 131 through the liquid outlet 1312 and enter the liquid replenishing tank 139. The liquid replenishing tank 139 is also provided with an exhaust valve 1394, which can be used to exhaust the residual air in the cooling circuit 1322 to avoid damage caused by excessive residual air in the cooling circuit 1322. The liquid medium in the liquid replenishing tank 139 can also flow smoothly into the cooling circuit 1322 to protect the safety of the pump body 138 and other devices.

[0063] During the long-term cooling process of the heat dissipation component 13, impurities may exist in the liquid medium. For example, dust in the pipe 137 will be mixed into the liquid medium, and metal debris generated by the operation of the pump body 138 and other equipment will also be mixed into the liquid medium. Impurities will circulate in the cooling circuit 1322 along with the liquid medium, which may cause damage to other devices and the pipe 137. Preferably, a filtering device 1393 is also provided in the liquid replenishment tank 139, and impurities in the liquid medium will be filtered and blocked in the liquid replenishment tank 139, and cannot re-enter the cooling circuit 1322. For example, Figure 8As shown, the liquid replenishing tank 139 includes an inlet 1391 and an outlet 1392. The liquid medium enters the liquid replenishing tank 139 through the inlet 1391 and flows out of the liquid replenishing tank 139 through the outlet 1392. The filter device 1393 is arranged between the inlet 1391 and the outlet 1392. The liquid medium can pass through the filter device 1393, and the impurities will be blocked between the outlet 1392 and the filter device 1393, so as to ensure the smooth flow of the liquid medium in the cooling circuit 1322 and improve the safety of the heat dissipation component 13. In addition, as the use time continues to accumulate, impurities may accumulate excessively in the liquid replenishing tank 139. The impurities can be handled by cleaning or replacing the liquid replenishing tank 139, etc., to prevent the impurities from affecting the filtering rate of the filter device 1393 and the flow rate of the liquid medium, thereby improving the cooling effect of the liquid medium.

[0064] See also Figure 3 as well as Figure 4 The pump body 138 is also disposed on the cooling circuit 1322 and is used to provide the liquid medium with a flow power, that is, the radiator 132, the pump body 138, the cooling plate 131 and the liquid replenishing tank 139 are interconnected through the pipeline 137 to form the cooling circuit 1322. The pump body 138 can enable the liquid medium to flow between the radiator 132 and the cooling plate 131.

[0065] In this example, please continue to refer to Figure 3 The light emitting device 11 includes a housing 111, a light source 112 and a reflector 113. The light source 112 and the reflector 113 are arranged in the housing 111. The housing 111 can be a metal housing. For example, the housing 111 can be an aluminum alloy housing. The metal housing has high thermal conductivity and high strength. It can not only have a certain heat dissipation effect, but also can dissipate the heat generated by the light source 112 in time, and can resist external impact to ensure the stability of the light source 112. The housing 111 has the function of protecting the light source 112 and the reflector 113, and the housing 111 can isolate the external environment to prevent external dust from entering the interior of the housing 111, thereby ensuring the effective propagation and utilization of light. The light source 112 can be an LED light emitting chip, a laser chip, etc. The selection of the light source 112 can be based on specific application requirements, such as comprehensive consideration of factors such as light color, brightness, and power consumption. The light source 112 is used to emit illumination light, and the reflector 113 is arranged on the light path of the illumination light. The reflector 113 can be an optical element such as a reflector and a right-angle prism. The illumination light is emitted to the reflector 113, and the reflector 113 can reflect the illumination light into the display module 12, and can also make the illumination light more evenly distributed on the display module 12. The display module 12 and the cooling plate 131 of the heat dissipation assembly 13 are fixed to the housing 111, and the display module 12 and the cooling plate 131 are arranged on the reflection light path of the reflector 113.

[0066] In one embodiment, the radiator 132 is disposed in the shell 111 and is located on the side of the light source 112 away from the reflector 113. The liquid channel 1321 of the heat sink can be arranged opposite to the light source 112. The heat generated by the light source 112 can be absorbed by the heat sink and dissipated through the heat sink, thereby reducing the operating temperature of the light source 112 and improving the working efficiency of the light source 112.

[0067] In a more specific implementation, please refer to Figure 2 , Figure 3 as well as Figure 6 The heat sink 132 includes a substrate 1324 and a plurality of heat sink fins 1325. The plurality of heat sink fins 1325 are spaced apart and distributed at one end of the substrate 1324. The end of the substrate 1324 away from the heat sink fins 1325 is attached to the side of the light source 112 away from the reflector 113. A liquid channel 1321 is formed in the substrate 1324. The liquid channel 1321 and the heat sink fins 1325 are arranged corresponding to each other. Heat will be transferred to the heat sink fins 1325 of the heat sink 132. When the external airflow passes through the heat sink fins 1325, the heat on the heat sink fins 1325 will be transferred to the external airflow, thereby achieving heat dissipation.

[0068] Preferably, to improve the heat dissipation effect of the heat sink 132, the airflow velocity on the heat sink fins 1325 is increased. The heat dissipation assembly 13 also includes a fan 1323, which is arranged on a side of the heat sink 132 away from the light source 112 and is used to blow air toward the heat sink 132 and the light source 112.

[0069] In another embodiment, see Fig. 9 The cooling plate 131 is attached to the light incident surface of the display module 12, and the light emitting surface of the display module 12 can be the surface of the display module 12 away from the light emitting device 11. The cooling plate 131 is arranged on the side of the display module 12 close to the light emitting device 11. The illumination light emitted by the light emitting device 11 passes through the cooling plate 131 and the display module 12 in sequence. The display module 12 receives the illumination light and modulates it to form image light. The cooling plate 131 can cool the display module and absorb part of the energy in the illumination light. In addition, it will not affect the subsequent image light, ensuring the integrity and projection effect of the image light.

[0070] In a more specific embodiment, the outer frame 133 may also be provided with a connection hole 1331, and the end of the light emitting device 11 facing the cooling plate 131 may be provided with a mounting hole. The elastic member 114 such as a screw may be inserted into the connection hole 1331 and connected to the mounting hole, so that the cooling plate 131 and the light emitting device 11 are relatively fixed. In addition, the HUD device 100 further includes a frame 121, which may be arranged around the display module 12, and the frame 121 may be provided with a through hole, which may be arranged opposite to the mounting hole and the connection hole 1331. The elastic member 114 may be simultaneously inserted into the connection hole 1331 and the through hole and connected to the mounting hole, so that the light emitting device 11, the frame 121 and the cooling plate 131 are relatively fixed. The display module 12 is then connected through the frame 121. For example, the frame 121 further includes an elastic pressure claw 122, and the elastic pressure claw 122 may be arranged on the side of the display module 12 away from the cooling plate 131. When the elastic member 114 fixes the frame 121 and the cooling plate 131 , the elastic pressing claw 122 can abut against the display module 12 . The elastic pressing claw 122 can limit the display module 12 from moving away from the cooling plate 131 , thereby ensuring the safe use of the display module 12 .

[0071] In the display device 10 provided by the present application, the light emitting device 11 emits illumination light, and the display module 12 receives the illumination light and modulates the image light. The display module 12 generates heat when it works, and the transparent window 134 of the cooling plate 131 is attached to the surface of the display module 12. The liquid medium flows through the transparent window 134 and exchanges heat with the display module 12, and the heat of the display module 12 is absorbed by the liquid medium. The liquid medium that has absorbed the heat flows to the heat sink 132, and transfers the heat to the external environment through the radiator 132. The operating temperature of the display device 10 is reduced, and the service life of the display device 10 is increased.

[0072] The HUD device 100 and the automobile 200 provided in the present application, the curved mirror 20 and the reflector 30 may reflect sunlight from the outside to the display module 12, causing the temperature of the display module 12 to increase. The HUD device 100 using the above display device 10 can reduce the temperature of the display module 12 through the cooling plate 131 to ensure the safe use of the display module 12, thereby ensuring that the HUD device 100 projects images normally and ensures the safe driving of the automobile 200.

[0073] The above implementation modes are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned implementation modes, a person skilled in the art should understand that the technical solutions described in the aforementioned implementation modes can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various implementation modes of the present application, and should all be included in the protection scope of the present application.

Claims

1. A display device, characterized in that: include: A light emitting device for emitting illumination light; A display module, the display module is used to receive illumination light and modulate it to form image light; as well as The heat dissipation component includes a cooling plate and a radiator, the cooling plate includes an outer frame and a transparent window, the transparent window is filled with a light-transmitting liquid medium, the transparent window is attached to a side surface of the display module, and the radiator is connected to the cooling plate to exchange heat with the cooling plate.

2. The display device according to claim 1, characterized in that The cooling plate is attached to the light incident surface of the display module.

3. The display device according to claim 1, characterized in that The cooling plate is attached to the light emitting surface of the display module.

4. The display device according to any one of claims 1 to 3, characterized in that: The transparent window includes a first transparent glass and a second transparent glass, the first transparent glass and the second transparent glass are fixed to the outer frame, the first transparent glass and the second transparent glass are relatively spaced apart, and the liquid medium is filled between the first transparent glass and the second transparent glass.

5. The display device according to claim 4, characterized in that: The refractive index of the first transparent glass and the second transparent glass is 1.5-1.

8.

6. The display device according to claim 5, characterized in that: The refractive index of the liquid medium is 1.33-1.

43.

7. The display device according to claim 6, characterized in that: The liquid medium includes water and ethylene glycol.

8. The display device according to claim 7, characterized in that: The volume ratio of the ethylene glycol to the water is 1-1.

5.

9. The display device according to claim 4, characterized in that: A hydrophilic film is provided on a surface of the first transparent glass facing the second transparent glass and / or a surface of the second transparent glass facing the first transparent glass.

10. The display device according to claim 4, characterized in that The light emitting surface of the cooling plate is provided with an infrared filter film.

11. The display device according to claim 4, characterized in that: The heat dissipation component also includes a pipeline, a pump body and a liquid replenishing tank. A liquid channel is formed in the radiator. The cooling plate is provided with a liquid inlet and a liquid outlet. The two ends of the liquid channel are connected to the liquid inlet and the liquid outlet through the pipeline to form a cooling circuit. The pump body and the liquid replenishing tank are arranged on the cooling circuit.

12. The display device according to claim 11, characterized in that: The liquid inlet is located below the liquid outlet.

13. The display device according to claim 12, characterized in that: The liquid replenishing tank is arranged at the liquid outlet, and the liquid replenishing tank is provided with an exhaust valve and a filtering device.

14. The display device according to claim 4, characterized in that: The light emitting device comprises a shell, a light source and a reflector, wherein the light source and the reflector are arranged in the shell, the display module and the cooling plate are fixed to the shell, the light source is used to emit illumination light, and the reflector is arranged on the optical path of the illumination light and is used to reflect the illumination light into the display module.

15. The display device according to claim 14, characterized in that: The heat sink is arranged on the housing and is located on a side of the light source away from the reflector.

16. The display device according to claim 15, characterized in that: The heat dissipation assembly further comprises a fan, which is disposed on a side of the heat sink away from the light source and is used to blow air toward the heat sink and the light source.

17. The display device according to claim 14, characterized in that: The light emitting device further comprises an elastic member, which is arranged on the housing and presses the cooling plate against the surface of the display module.

18. A HUD device, characterized in that: include: The display device according to any one of claims 1 to 17; A curved mirror, used for receiving and reflecting image light emitted by the display device; The reflector is used to deflect the reflected image light to form an image on the projection surface.

19. A car, characterized in that: Comprising the HUD device as claimed in claim 18.

Images