Display device for vehicle

Abstract

The invention provides a display device for a vehicle, which can effectively realize a function of discharging liquid immersed in an opening part for heat discharge of a housing to the outside of the housing and a heat discharge function of a radiator. A vehicle display device (100) is provided with: a housing (10) mounted on a vehicle (200); an image display device (20) provided in the housing section (HS) of the housing; and a heat sink (30) which is provided at a position in contact with the image display device, in which an opening (12a) that opens upward is formed in the housing, and which has a heat dissipation surface (30a) exposed from the housing via the opening, the heat sink being attached to a position inside the housing so as to separate the housing from the opening. A discharge flow path (FP) for discharging the liquid immersed in the opening to the outside of the housing is formed in the heat dissipation surface.

Description

Technical Field

[0001] The present invention relates to a display device for a vehicle. Background Art

[0002] Patent document 1 discloses a head-up display, which includes: a backlight unit; a first shell having two fixing parts for fixing a lens holder; and a second shell that fits into the first shell. In addition, Patent document 1 discloses that the backlight unit includes: a substrate on which a light source for irradiating a display panel from the back is mounted; a lens for focusing light from the light source; a lens holder for housing the lens and the substrate; and a heat sink to which the lens holder is fixed to dissipate heat transferred from the substrate. A protective wall surrounding the heat sink is provided in the first shell of the head-up display, and a drainage hole is formed in the bottom side protective wall to drain water that is intended to penetrate into the first shell from the protective wall.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2019-166852 Summary of the invention

[0006] Technical problem that the invention aims to solve

[0007] In a vehicle display device, there is still room for improvement in achieving both a function of discharging liquid that has entered the heat dissipation opening of the housing to the outside of the housing and a heat dissipation function of the radiator.

[0008] An object of the present invention is to provide a vehicle display device capable of effectively achieving both a function of discharging liquid that has entered an opening for heat dissipation of a housing to the outside of the housing and a heat dissipation function of a radiator.

[0009] Technical solutions to the problem

[0010] The vehicle display device of the present invention is characterized in that it comprises: a shell, which is mounted on a vehicle; an image display device, which is arranged in a storage portion of the shell; and a radiator, which is arranged at a position in contact with the image display device, and an opening portion is formed in the shell and opens upward when the shell is mounted on the vehicle. The radiator is installed in the shell at a position separating the storage portion from the opening portion, and the radiator has a heat dissipation surface exposed from the shell through the opening portion, and a discharge flow path is formed on the heat dissipation surface to discharge liquid immersed in the opening portion to the outside of the shell.

[0011] Effects of the Invention

[0012] The vehicle display device according to the present invention has the effect of being able to effectively achieve both the function of discharging liquid that has entered the heat dissipation opening of the housing to the outside of the housing and the heat dissipation function of the radiator. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a diagram showing a vehicle equipped with the vehicle display device according to the embodiment.

[0014] Figure 2 It is a schematic configuration diagram showing a vehicle display device according to an embodiment.

[0015] Figure 3 It is a perspective view showing a vehicle display device according to the embodiment.

[0016] Figure 4 It is an exploded perspective view showing a vehicle display device according to an embodiment.

[0017] Figure 5 It is a perspective view showing a heat sink and an image display device according to an embodiment.

[0018] Figure 6 It is an exploded perspective view showing a heat sink and an image display device according to an embodiment.

[0019] Figure 7 It is an exploded perspective view showing a heat sink and an image display device according to an embodiment.

[0020] Figure 8 It is a perspective view showing a heat sink and an image display device according to an embodiment.

[0021] Description of Reference Numerals

[0022] 10: Shell

[0023] 11: lower case, 12: upper case, 12a: opening, 12b: discharge port

[0024] 30: radiator, 30a: heat dissipation surface

[0025] 40: Mirror device

[0026] 100: vehicle display device, CR: control unit, FP: discharge flow path, RM: reflection member DETAILED DESCRIPTION

[0027] Hereinafter, the vehicle display device according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings. In addition, the present invention is not limited to the embodiment. In addition, the constituent elements in the following embodiment include elements that can be easily thought of by those skilled in the art or substantially the same elements.

[0029] Reference Figures 1 to 8 , an embodiment is described. This embodiment relates to a display device for a vehicle. Figure 1 FIG. 1 is a diagram showing a vehicle equipped with a vehicle display device according to an embodiment. Figure 2 is a schematic structural diagram showing a vehicle display device according to an embodiment of the present invention. Figure 3 is a perspective view showing a vehicle display device according to an embodiment, Figure 4 is an exploded perspective view showing a vehicle display device according to an embodiment. Figure 5 is a perspective view showing a heat sink and an image display device according to an embodiment, Figure 6 is an exploded perspective view showing a heat sink and an image display device according to an embodiment, Figure 7 is an exploded perspective view showing a heat sink and an image display device according to an embodiment, Figure 8 It is a perspective view showing a heat sink and an image display device according to an embodiment.

[0030] Figure 1 The vehicle display device 100 of the illustrated embodiment is a head-up display device mounted on a vehicle 200 such as an automobile. The vehicle display device 100 is housed in an instrument panel 220 of the vehicle 200. The vehicle display device 100 projects the display light Lt of the image toward the reflection surface 210a of the windshield 210 of the vehicle 200 through the opening of the instrument panel 220. The windshield 210 is a reflection portion located in front of the eye point EP of the vehicle 200, and has, for example, semi-transmissiveness, and reflects the display light Lt incident on the reflection surface 210a from the vehicle display device 100 toward the eye point EP. The driver of the vehicle 200 can visually confirm the virtual image Vi through the display light Lt reflected by the windshield 210.

[0031] like Figure 2 As shown in FIG. 1 , the vehicle display device 100 includes a housing 10, an image display device 20, a radiator 30, a reflector device 40, a reflector member RM, and a control unit CR. The housing 10 is formed in a box shape and is mounted on the vehicle 200. The housing 10 accommodates the image display device 20, the reflector device 40, the reflector member RM, and the control unit CR in a storage portion HS (see FIG. 1 ) on the inner side of the housing 10. Figure 4 ). In addition, the heat sink 30 is mounted on the image display device 20. The image display device 20, the heat sink 30, the mirror device 40, the reflection member RM and the control unit CR are fixed to the housing 10.

[0032] The housing 10 is formed with an opening 12 c (see FIG. 1 ) for emitting the display light Lt from the inside of the housing 10 toward the reflecting surface 210 a of the windshield 210 . Figure 3), and a cover member 13 is installed to close the opening 12c. The cover member 13 is a light-transmitting member that allows at least the display light Lt emitted by the image display device 20 to pass through.

[0033] like Figure 3 and Figure 4 As shown, the housing 10 of the embodiment includes a lower housing 11 and an upper housing 12. The lower housing 11 and the upper housing 12 are molded of, for example, insulating synthetic resin. The lower housing 11 is a box-shaped component with an opening at the top, and the upper housing 12 is a box-shaped component with an opening at the bottom. The lower housing 11 and the upper housing 12 are engaged in a manner such that the opening of the lower housing 11 is aligned with the opening of the upper housing 12, thereby constituting the housing 10. In the housing 10 of the embodiment, an opening 12c for emitting the display light Lt toward the reflecting surface 210a of the windshield 210 is formed in a portion of the upper surface of the upper housing 12. The image display device 20, the reflector device 40, the reflecting member RM, and the control unit CR are assembled and held in the lower housing 11.

[0034] The image display device 20 outputs the display image projected onto the windshield 210 as display light Lt. The image display device 20 is configured to include a liquid crystal display unit and a backlight unit. The liquid crystal display unit is a so-called liquid crystal panel, and is composed of, for example, a translucent or semi-translucent TFT liquid crystal (Thin Film Transistor Liquid Crystal Display) or the like. The liquid crystal display unit is illuminated from the back side so that the display surface on the front side emits light. The backlight unit illuminates the liquid crystal display unit from the back side. The backlight unit is driven, for example, by power obtained from a battery (not shown) in the vehicle 200.

[0035] The heat sink 30 is arranged in contact with the image display device 20, and is a component for dissipating heat generated by the image display device 20. The heat sink 30 is formed of a metal component with high thermal conductivity such as aluminum. In the embodiment, the heat sink 30 is installed on the back side of the image display device 20 (the side opposite to the exit surface from which the display light Lt is emitted), and is configured to mainly receive the heat generated by the backlight unit and dissipate the heat to the outside of the housing 10.

[0036] The housing 10 is formed with an opening 12a, and when the housing 10 is mounted on the vehicle 200, the opening 12a opens upward. Figure 3 As shown, the opening 12a is provided in a portion of the upper housing 12 different from the portion where the opening 12c is formed. The opening 12a of the embodiment is formed in a substantially rectangular shape when viewed from above. The opening 12a is an opening for dissipating heat from the radiator 30 to the outside of the housing 10.

[0037] The heat sink 30 is mounted on the housing 10 in a manner to close the opening 12a. The heat sink 30 has a heat dissipation surface 30a, and the heat dissipation surface 30a is exposed from the housing 10 through the opening 12a. Figure 2 as well as Figure 4 As shown, in the vehicle display device 100, the image display device 20, the mirror device 40, the reflection component RM and the control unit CR are stored in the storage portion HS of the housing 10, and the heat sink 30 is installed in the housing 10 at a position separating the storage portion HS from the opening portion 12a.

[0038] A discharge flow path FP is formed on the heat dissipation surface 30a of the radiator 30 to discharge the liquid that has entered the opening 12a to the outside of the housing 10. For example, liquid such as a drink spilled by a passenger of the vehicle 200 may enter the opening 12a of the image display device 20 through the opening of the instrument panel 220. The liquid that has entered the opening 12a flows on the discharge flow path FP and is directly discharged to the outside of the housing from the end of the discharge flow path FP.

[0039] like Figure 5 , Figure 6 As shown in the figure, the heat sink 30 has a plurality of protrusions 31 protruding from the heat dissipation surface 30a, and in the heat dissipation surface 30a, the discharge flow path FP is formed as a groove-shaped portion between adjacent protrusions 31. The protrusions 31 of the embodiment function as heat sinks. That is, the protrusions 31 have the function of increasing the surface area of ​​the heat sink 30 and improving the heat dissipation effect of the heat sink 30.

[0040] The heat sink 30 of the embodiment is provided with a side wall portion 32 erected along the outer periphery of the heat sink surface 30a, and the protrusion 31 is arranged inside the area of ​​the heat sink surface 30a surrounded by the side wall portion 32. Here, a groove-shaped discharge flow path FP is also formed between the side wall portion 32 and the protrusion 31 arranged at a position adjacent to the side wall portion 32. The heat sink 30 can prevent the liquid falling on the heat sink surface 30a of the heat sink 30 from leaking to the housing 10 side by separating the heat sink surface 30a from the housing 10 by the side wall portion 32. For example, the heat sink 30 can prevent the liquid falling on the heat sink surface 30a of the heat sink 30 from entering the storage portion HS from between the heat sink surface 30a and the housing 10 by the side wall portion 32.

[0041] In the heat sink 30 of the embodiment, a part of the side wall portion 32 is cut away, and the cut away portion becomes the end of the discharge flow path FP. The end of the discharge flow path FP is a portion that discharges the liquid that has entered the opening portion 12a from the opening portion 12a to the outside of the housing 10. When the heat sink 30 is mounted on the housing 10, the discharge flow path FP is formed so that the liquid that has fallen on the heat dissipation surface 30a flows toward the end of the drainage flow path FP, and the end of the discharge flow path FP is arranged at a position where the liquid that has entered the opening portion 12a is discharged to the outside of the housing 10.

[0042] like Figure 3 and Figure 4 As shown, the housing 10 has a discharge port 12b as an outlet for the liquid immersed in the opening 12a. In the embodiment, a cutout is formed at a part of the edge of the side wall of the upper housing 12, and the discharge port 12b is formed by the cutout and the edge of the side wall of the lower housing 11. The heat sink 30 of the embodiment is formed with two ends of the discharge flow path FP, and the discharge ports 12b are respectively formed at positions corresponding to the respective ends of the discharge flow path FP in the side wall of the housing 10. That is, the ends of the discharge flow path FP and the discharge ports 12b are set one to one.

[0043] like Figure 5 as well as Figure 6 As shown, the drainage flow path FP of the radiator 30 includes: a rectifying area FPa, which is an area between adjacent protrusions 31; and a terminal area FPb, which is arranged in the discharge port 12b and is an area including the terminal of the discharge flow path FP. In addition, the rectifying area FPa of the embodiment also includes an area between the side wall portion 32 and the protrusion 31 arranged at a position adjacent to the side wall portion 32. The rectifying area FPa is an area for guiding the liquid falling on the heat dissipation surface 30a to the terminal area FPb. The rectifying area FPa is exposed from the opening 12a of the housing 10. The liquid immersed in the opening 12a falls on the rectifying area FPa, flows in the discharge flow path FP of the rectifying area FPa, and is guided to the terminal area FPb. The terminal area FPb is an area for discharging the liquid immersed in the opening 12a to the outside of the opening 12a (outside the housing 10). The terminal area FPb is provided at a part of the outer peripheral portion of the radiator 30 and is formed protruding from the rectifying area FPa.

[0044] In the embodiment, the terminal region FPb, which is a region including the terminal end of the discharge flow path FP, is arranged in the discharge port 12b of the housing 10. The terminal end of the discharge flow path FP is exposed from the discharge port 12b, and the liquid that has penetrated into the opening 12a is directly discharged from the terminal end of the discharge flow path FP to the outside of the opening 12a (outside the housing 10) via the rectifying region FPa. That is, in the vehicle display device 100 involved in the embodiment, the terminal region FPb is formed so that the liquid flowing in the discharge flow path FP (terminal region FPb) does not contact the housing 10. According to this structure, it is possible to suppress the liquid from penetrating into the storage portion HS from between the housing 10 and the radiator 30.

[0045] In addition, when the housing 10 is mounted on the vehicle 200, the radiator 30 is mounted on the housing 10 in a state where the heat dissipation surface 30a is tilted so that the terminal end of the discharge flow path FP faces downward. That is, when the housing 10 is mounted on the vehicle 200, the heat dissipation surface 30a is tilted so that the terminal end of the discharge flow path FP faces downward relative to the horizontal plane perpendicular to the vertical direction of the vehicle 200. The tilt angle of the heat dissipation surface 30a relative to the horizontal plane perpendicular to the vertical direction of the vehicle 200 is appropriately set to an angle of inclination to a degree that allows the liquid immersed in the opening 12a to flow smoothly from the rectification area FPa toward the terminal area FPb. In addition, in order to use the liquid on the heat dissipation surface 30a for cooling the radiator 30, the tilt angle of the heat dissipation surface 30a may be set to an angle that can ensure the retention time of the liquid on the heat dissipation surface 30a to a certain extent.

[0046] In the embodiment, each protrusion 31 is formed in a plate shape extending in the direction in which the heat dissipation surface 30a is inclined. In the extending direction of each protrusion 31, the end of each protrusion 31 on the side of the terminal region FPb (the lower end of each protrusion 31 in the direction in which the heat dissipation surface 30a is inclined) is separated from the side wall portion 32 of the heat sink 30. The liquid flowing between adjacent protrusions 31 passes through the end of the protrusion 31 on the side of the terminal region FPb and the side wall portion 32, and reaches the terminal region FPb (the end of the discharge flow path FP).

[0047] like Figure 6 and Figure 7As shown, the heat sink 30 is installed so that the surface (installation surface) on the opposite side of the heat dissipation surface 30a contacts the image display device 20. In the embodiment, the image display device 20 includes: a main body 21, which includes a liquid crystal display unit and a light source of a backlight unit; and a shell 22, which accommodates the main body 21. In the image display device 20 of the embodiment, the shell 22 is a box-shaped component having an opening on one surface, and accommodates the liquid crystal display unit and the light source of the backlight unit in a manner that the display surface of the liquid crystal display unit is exposed from the opening. The light source is accommodated in the shell 22 to form a backlight unit. The light source of the backlight unit is arranged in the shell 22 at a position opposite to the back surface on the opposite side of the display surface of the liquid crystal display unit.

[0048] like Figure 8 As shown in FIG. 1 , the heat sink 30 is mounted on the rear portion of the housing 22 (the portion of the housing 22 on the side opposite to the portion of the display surface of the liquid crystal display unit exposed). The heat sink 30 is fixed to the housing 22 by fixing members such as screws. The housing 22 is formed of, for example, a resin material. In addition, the housing 22 may also be formed of a metal material having high thermal conductivity such as aluminum. In this case, the heat generated by the light source of the backlight unit, etc., can be efficiently transferred to the heat sink 30.

[0049] In addition, as described above, the vehicle display device 100 of the embodiment is provided with the reflective member RM. Figure 2 As shown, the reflector RM is a plane mirror, and the reflective surface for reflecting the display light Lt is formed by a plane. The reflector RM is arranged at a position facing the image display device 20. The reflector RM reflects the display light Lt emitted from the image display device 20 toward the reflector 41 of the reflector device 40.

[0050] The reflector device 40 includes a reflector 41, a driving member 42, and a bearing member 43. The reflector 41 reflects the display light Lt reflected by the reflecting member RM toward the reflecting surface 210a of the windshield 210 via the opening 12c. The reflector 41 of the embodiment is a concave mirror and has a function as a magnifying glass. That is, the reflector 41 of the embodiment magnifies and reflects the display image, so that the display image represented by the display light Lt after reflection by the concave reflector 41 becomes relatively larger than the display image represented by the display light Lt before reflection by the reflector 41.

[0051] The reflector 41 includes a main body and a pair of rotation axes protruding from the side walls of the main body. The main body has a reflecting surface that reflects the display light Lt. In the embodiment, the shape of the main body observed from the thickness direction of the main body is a substantially rectangular flat plate-shaped component with the direction along the rotation axis of the reflector as the length direction.

[0052] The rotation axis of the reflector is arranged at the position of the rotation axis. The rotation axis is the rotation center of the reflector 41. The central axes of the rotation axes of the reflector are respectively located on the rotation axis. In the embodiment, the rotation axes of the reflector protrude from the side walls in the width direction of the main body along the rotation axis, respectively, and a driving component 42 is installed on one rotation axis, and a bearing component 43 is installed on the other rotation axis. The driving component 42 and the bearing component 43 are fixed to the lower housing 11 by fixing components such as screws, and the reflector 41 is installed on the lower housing 11 via the driving component 42 and the bearing component 43.

[0053] The driving component 42 includes a motor and a power transmission component. The motor rotates the output shaft of the motor by power supplied from a battery of the vehicle 200 or the like. The power transmission component is a component that transmits driving force from the output shaft of the motor to the rotation shaft of the reflector. The power transmission component is composed of, for example, gears or the like. The rotation of the output shaft of the motor is transmitted to the rotation shaft of the reflector 41 through the power transmission component, thereby rotating the main body of the reflector 41. According to this structure, the angle of the main body of the reflector 41 can be changed.

[0054] The control unit CR controls the display of the display image (virtual image) displayed by the vehicle display device 100 by controlling the image display device 20. In addition, the control unit CR is also connected to the reflector device 40, and can adjust the angle of the main body of the reflector 41 by controlling the rotation of the motor of the reflector device 40. That is, the control unit CR can control the reflector device 40 to adjust the display position of the display image.

[0055] As described above, the vehicle display device 100 involved in the embodiment includes: a housing 10, which is mounted on the vehicle 200; an image display device 20, which is arranged in the storage portion HS of the housing 10; and a radiator 30, which is arranged at a position in contact with the image display device 20, and an opening portion 12a is formed in the housing 10, which opens upward when the housing 10 is mounted on the vehicle 200. The radiator 30 is installed in the housing 10 at a position separating the storage portion HS and the opening portion 12a, and has a heat dissipation surface 30a exposed from the housing 10 through the opening portion 12a, and a discharge flow path FP is formed on the heat dissipation surface 30a for discharging liquid immersed in the opening portion 12a to the outside of the housing 10.

[0056] In the vehicle display device 100 involved in the embodiment, by forming a discharge flow path FP in the radiator 30 for discharging the liquid immersed in the opening 12a of the housing 10 to the outside of the housing 10, it is possible to efficiently take into account both the function of discharging the liquid immersed in the opening 12a for heat dissipation of the housing 10 to the outside of the housing 10 and the heat dissipation function of the radiator 30. In addition. Since the liquid immersed in the opening 12a and falling on the radiator 30 can be directly discharged to the outside of the housing 10, it is possible to suppress the liquid from being immersed in the storage portion HS from between the radiator 30 and the housing 10. In addition, for example, by providing the discharge flow path FP on the heat dissipation surface 30a of the radiator 30, the liquid on the heat dissipation surface 30a can be used for cooling the radiator 30, and the liquid can be guided to the outside of the housing 10. Furthermore, by forming the discharge flow path FP in the heat sink 30 , the liquid entering from the opening 12 a can be discharged to the outside of the housing 10 even if the discharge flow path is not formed in the housing 10 . This eliminates the need to provide a discharge flow path in the housing 10 , thereby miniaturizing the housing 10 .

[0057] In the vehicle display device 100 according to the embodiment, the heat sink 30 includes a plurality of protrusions 31 protruding from the heat dissipation surface 30 a , and the discharge flow path FP is formed as a groove-shaped portion between adjacent protrusions 31 on the heat dissipation surface 30 a .

[0058] In the vehicle display device 100 according to the embodiment, the discharge flow path FP is formed using the heat sink 30 (protrusion 31 ), thereby improving the heat dissipation efficiency of the heat sink 30 and discharging the liquid entering through the opening 12 a to the outside of the housing.

[0059] In addition, in the vehicle display device 100 involved in the embodiment, the shell 10 has a discharge port 12b serving as an outlet for liquid immersed in the opening portion 12a, and the discharge flow path FP includes: a rectification area FPa, which is an area between adjacent protrusions 31; and an end area FPb, which is arranged in the discharge port 12b and is an area including the end of the discharge flow path FP.

[0060] In the vehicle display device 100 according to the embodiment, the liquid is directly discharged from the end of the discharge flow path FP to the outside of the housing 10 through the discharge port of the housing 10, thereby preventing the liquid from falling between the housing 10 and the radiator 30. In other words, the liquid can be prevented from entering the storage portion HS from between the housing 10 and the radiator 30.

[0061] In the vehicle display device 100 according to the embodiment, when the housing 10 is mounted on the vehicle 200 , the heat dissipation surface 30 a is inclined with the distal end of the discharge flow path FP facing downward relative to a horizontal plane perpendicular to the vertical direction of the vehicle 200 .

[0062] In the vehicle display device 100 involved in the embodiment, the heat dissipation surface 30a of the radiator 30 is inclined toward the discharge port of the housing 10, so that the liquid can be discharged smoothly, and the retention time of the liquid on the heat dissipation surface 30a is ensured to a certain extent, so that the radiator 30 can be cooled by the liquid.

[0063] [Modifications]

[0064] In addition, in the above-mentioned embodiment, the structure in which the image display device 20, the reflector device 40, the reflective component RM and the control unit CR are assembled in the lower housing 11 is described as an example, but the present invention is not limited to this structure. For example, the image display device 20, the reflector device 40, the reflective component RM and the control unit CR may be assembled in the upper housing 12.

[0065] [Reference example]

[0066] As a reference example different from the embodiment, it is also possible to provide a cover covering the opening 12a in the upper housing 12 without forming the exhaust flow path FP in the radiator 30. However, in this case, heat is accumulated in the space between the heat dissipation surface 30a of the radiator 30 and the cover, and the heat dissipation function of the vehicle display device may be reduced. In addition, the housing 10 will be larger due to the provision of the cover.

[0067] On the other hand, in the vehicle display device 100 according to the embodiment, the discharge flow path FP is provided in the radiator 30, so that even if liquid enters the opening 12a, it can be discharged to the outside of the opening 12a. Therefore, compared with the structure of the reference example in which the cover is provided on the upper housing 12, the housing 10 can be made smaller.

[0068] The contents disclosed in the above-mentioned embodiments can be executed in combination as appropriate.

Claims

1. A vehicle display device, characterized in that: have: a housing, the housing being mounted on a vehicle; an image display device, the image display device being disposed in the storage portion of the housing; and a heat sink, the heat sink being arranged at a position in contact with the image display device, The housing has an opening portion formed therein that opens upward when the housing is mounted on the vehicle. The heat sink is installed in the housing at a position separating the storage portion from the opening, and the heat sink has a heat dissipation surface exposed from the housing through the opening. The heat dissipation surface has a discharge flow path formed thereon for discharging the liquid entering the opening to the outside of the housing.

2. The vehicle display device according to claim 1, characterized in that: The heat sink has a plurality of protrusions protruding from the heat dissipation surface. In the heat dissipation surface, the discharge flow path is formed as a groove-shaped portion between adjacent protrusions.

3. The vehicle display device according to claim 2, characterized in that: The housing has a discharge port as an outlet for the liquid immersed in the opening. The discharge flow path includes: a flow straightening region that is a region between adjacent protrusions; and a terminal region that is a region disposed in the discharge port and includes a terminal end of the discharge flow path.

4. The vehicle display device according to any one of claims 1 to 3, characterized in that: When the housing is mounted on the vehicle, the heat dissipation surface is inclined with respect to a horizontal plane perpendicular to the up-down direction of the vehicle so that a terminal end of the discharge flow path faces downward.

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