Vehicle display device

Abstract

Vehicle display device (100) comprising a housing (10) attached to a vehicle (200), an image display device (20) provided in a housing section (HS) of the housing (10), and a heat sink (30) provided at a position to contact the image display device (20), wherein the housing (10) has an opening (12a) open upwards, the heat sink (30) is attached at a position to separate the housing section (HS) and the opening (12a) from each other in the housing (10), and has a heat dissipation surface (30a) exposed from the housing (10) through the opening (12a), and a discharge flow path (FP) is formed on the heat dissipation surface (30a) to the outside of the housing (10) for discharging any liquid that has entered the opening (12a).

Description

Background of the invention 1. Field of the invention

[0001] The present invention relates to a vehicle display device. 2. Description of the state of the art

[0002] Japanese Laid-Open Patent Publication No. 2019-166852 discloses a head-up display including a backlight unit, a first housing having two mounting portions to which a lens holder is attached, and a second housing attached to the first housing. Japanese Laid-Open Patent Publication No. 2019-166852 discloses that the backlight unit includes a substrate on which a light source is mounted in such a manner that light is emitted toward a display panel from the back side thereof, a lens that converges a light beam from the light source, a lens holder that accommodates the lens and the substrate, and a heat sink to which the lens holder is attached and that dissipates heat transferred from the substrate.The first housing of the head-up display has a protective wall surrounding the heat sink, and a drainage hole for draining moisture that tries to penetrate from the protective wall into the interior of the first housing is provided in the protective wall at the bottom.

[0003] In a vehicle display device, there is still room for improvement in order to achieve both the function of discharging a liquid that has entered a heat dissipation port of a housing to the outside and the heat dissipation function of a heat sink. Summary of the invention

[0004] Therefore, it is an object of the present invention to provide a vehicle display device capable of efficiently performing both a function of discharging a liquid that has entered a heat dissipation port of a housing to the outside and a heat dissipation function of a heat sink.

[0005] To achieve the above object, a vehicle display device according to one aspect of the present invention includes a case mounted on a vehicle; an image display device provided in a case portion of the case; and a heat sink provided at a position to contact the vehicle display device, wherein the case has an opening open upward in a state where the case is mounted on the vehicle, the heat sink is fixed at a position to separate the case portion and the opening from each other in the case, and has a heat dissipation surface exposed from the case through the opening, and a discharge flow path for discharging a liquid that has entered the opening to an outside of the case is formed on the heat dissipation surface.

[0006] The foregoing and other objects, features, advantages, as well as technical and industrial significance of this invention will be better understood when the following detailed description of the presently preferred embodiments of the invention is read in conjunction with the accompanying drawings. Short description of the drawings Fig. 1 is a view showing a vehicle to which a vehicle display device according to an embodiment is mounted; Fig. 2 is a schematic configuration diagram showing the vehicle display device according to the embodiment; Fig. 3 is a perspective view showing the vehicle display device according to the embodiment; Fig. 4 is an exploded perspective view showing the vehicle display device according to the embodiment; Fig. 5 is a perspective view showing a heat sink and an image display device according to the embodiment; Fig. 6 is an exploded perspective view showing the heat sink and the image display device according to the embodiment; Fig. Fig. 7 is an exploded perspective view showing the heat sink and the image display device according to the embodiment; and Fig. 8 is a perspective view showing the heat sink and the image display device according to the embodiment. Detailed description of the preferred embodiments

[0007] Hereinafter, a vehicle display device according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the present embodiment. Furthermore, the components in the following embodiment include those easily conceived by those skilled in the art or those that are substantially the same. Embodiment

[0008] An embodiment is described with reference to the Fig. 1 to 8. The present embodiment relates to a vehicle display device. Fig. 1 is a view showing a vehicle on which a vehicle display device according to an embodiment is mounted, Fig. 2 is a schematic configuration diagram showing the vehicle display device according to the embodiment, Fig. 3 is a perspective view showing the vehicle display device according to the embodiment, Fig. 4 is an exploded perspective view showing the vehicle display device according to the embodiment, Fig. 5 is a perspective view showing a heat sink and an image display device according to the embodiment, Fig. 6 is an exploded perspective view showing the heat sink and the image display device according to the embodiment, Fig. Fig. 7 is an exploded perspective view showing the heat sink and the image display device according to the embodiment, and Fig. 8 is a perspective view showing the heat sink and the image display device according to the embodiment.

[0009] A vehicle display device 100 according to a Fig. The embodiment illustrated in Figure 1 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 image display light Lt through an opening of the instrument panel 220 onto a reflection surface 210a of a windshield 210 of the vehicle 200. The windshield 210 is a reflective portion located in front of an eye point EP in the vehicle 200 and is semitransparent, for example, and reflects the display light Lt incident from the vehicle display device 100 onto the reflection surface 210a toward the eye point EP. A driver of the vehicle 200 can visually recognize a virtual image Vi through the display light Lt reflected from the windshield 210.

[0010] As in Fig. As shown in Figure 2, the vehicle display device 100 comprises a housing 10, an image display device 20, a heat sink 30, a mirror device 40, a reflection element RM, and a control unit CR. The housing 10 has the shape of a box and is mounted on the vehicle 200. The housing 10 accommodates the image display device 20, the mirror device 40, the reflection element RM, and the control unit CR in a housing section HS (see Fig. 4) inside the housing 10. The heat sink 30 is attached to the image display device 20. The image display device 20, the heat sink 30, the mirror device 40, the reflection element RM, and the control unit CR are attached to the housing 10.

[0011] The housing 10 has an opening 12c (see Fig. 3) through which the display light Lt exits from the interior of the housing 10 toward the reflection surface 210a of the windshield 210, and a cover member 13 that closes the opening 12c is attached to the housing 10. The cover member 13 is a light-transmitting member that transmits at least the display light Lt emitted from the image display device 20.

[0012] As in Fig. 3 and Fig. As shown in Fig. 4, the housing 10 according to the embodiment includes a lower housing 11 and an upper housing 12. The lower housing 11 and the upper housing 12 are made of, for example, an insulating resin. The lower housing 11 is a box-shaped member whose top is open, and the upper housing 12 is a box-shaped member whose bottom is open. The lower housing 11 and the upper housing 12 constitute the housing 10 by engaging with each other such that an opening of the lower housing 11 and an opening of the upper housing 12 are aligned with each other. In the housing 10 according to the embodiment, the opening 12c through which the display light Lt is radiated toward the reflection surface 210a of the windshield 210 is formed in a partial region of an upper surface of the upper housing 12.The image display device 20, the mirror device 40, the reflection element RM and the control unit CR are mounted and held in the lower housing 11.

[0013] The image display device 20 outputs a display image to be projected onto the windshield 210 as display light Lt. The image display device 20 includes a liquid crystal display section and a backlight unit. The liquid crystal display section is a so-called liquid crystal panel and is composed of, for example, a transmissive or semitransmissive thin-film transistor (TFT) liquid crystal display and the like. The liquid crystal display section is illuminated from the back, thereby illuminating a display surface on the front. The backlight unit illuminates the liquid crystal display section from the back. The backlight unit is powered by, for example, electric power supplied from a battery (not shown) in the vehicle 200.

[0014] The heat sink 30 is arranged in contact with the image display device 20 and is a member that dissipates heat generated in the image display device 20. The heat sink 30 is made of, for example, a metal member with high thermal conductivity, such as aluminum. In the embodiment, the heat sink 30 is attached to a back surface of the image display device 20 (a side opposite an emission surface onto which the display light Lt is emitted) and is mainly configured to absorb the heat generated in the backlight unit and dissipate it to the outside of the housing 10.

[0015] The housing 10 has an opening 12a which is open upward in a state in which the housing 10 is mounted on the vehicle 200. As shown in Fig. As shown in Figure 3, the opening 12a is provided in a portion different from the portion where the opening 12c of the upper housing 12 is formed. In plan view, the opening 12a according to the embodiment has a substantially rectangular shape. The opening 12a is an opening for dissipating heat from the heat sink 30 to the outside of the housing 10.

[0016] The heat sink 30 is attached to the housing 10 so that it closes the opening 12a. The heat sink 30 has a heat dissipation surface 30a, and the heat dissipation surface 30a is led out of the housing 10 through the opening 12a. As shown in Fig. 2 and Fig. 4, in the vehicle display device 100, the image display device 20, the mirror device 40, the reflection element RM, and the control unit CR are housed in the housing portion HS of the housing 10, and the heat sink 30 is fixed at a position separating the housing portion HS and the opening 12a from each other in the housing 10.

[0017] A discharge flow path FP is formed on the heat dissipation surface 30a of the heat sink 30 to discharge a liquid that has entered the opening 12a to the outside of the housing 10. For example, a 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 an opening of the instrument panel 220. The liquid that has entered the opening 12a flows along the discharge flow path FP and is directly discharged from a terminal end of the discharge flow path FP to the outside of the housing.

[0018] As in Fig. 5 and Fig. As shown in Figure 6, the heat sink 30 has a plurality of protrusions 31 protruding from the heat dissipation surface 30a, and the dissipation flow path FP is formed as a groove-shaped portion between adjacent protrusions 31 on the heat dissipation surface 30a. The protrusions 31 according to the embodiment serve as heat dissipation fins. That is, the protrusions 31 increase the surface area of ​​the heat sink 30, thereby improving the heat dissipation effect of the heat sink 30.

[0019] The heat sink 30 according to the embodiment has a side wall 32 constructed along the outer periphery of the heat dissipation surface 30a, and the protrusions 31 are arranged on the heat dissipation surface 30a within a region surrounded by the side wall 32. Here, too, a groove-shaped discharge flow path FP is formed between the side wall 32 and the protrusion 31 located at a position adjacent to the side wall 32. Since the side wall 32 of the heat sink 30 separates the heat dissipation surface 30a and the case 10, leakage of liquid splashed onto the heat dissipation surface 30a of the heat sink 30 into the case 10 can be suppressed. For example, the side wall 32 of the heat sink 30 can prevent the liquid sprayed onto the heat dissipation surface 30a of the heat sink 30 from entering the housing section HS from the area between the heat dissipation surface 30a and the housing 10.

[0020] In the heat sink 30 according to the embodiment, a part of the side wall 32 is cut out, and this cutout portion is a terminal end portion of the discharge flow path FP. The terminal end portion of the discharge flow path FP is a portion for discharging the liquid that has entered the opening 12a from the inside of the opening 12a to the outside of the case 10. In a state where the heat sink 30 is attached to the case 10, the discharge flow path FP is formed so that the liquid splashed onto the heat dissipation surface 30a flows to the terminal end of the discharge flow path FP, and the terminal end of the discharge flow path FP is located at a position where the liquid that has entered the opening 12a is discharged to the outside of the case 10.

[0021] As in the Fig. 3 and Fig. As shown in Figure 4, the casing 10 has an outlet port 12b, which is an outlet for liquid that has entered the port 12a. In the embodiment, a cutout is formed in a portion of an edge of a side wall of the upper casing 12, and the outlet port 12b is formed by the cutout and an edge of a side wall of the lower casing 11. In the heat sink 30 according to the embodiment, two terminal ends of the discharge flow path FP are formed, and the outlet port 12b is formed at a position corresponding to each of the terminal ends of the discharge flow path FP on a side wall of the casing 10. That is, the terminal end of the discharge flow path FP and the outlet port 12b are provided in one-to-one correspondence.

[0022] As in Fig. 5 and Fig. As shown in Fig. 6, the discharge flow path FP of the heat sink 30 includes a rectification region FPa, which is a region between adjacent protrusions 31, and a terminal end region FPb, which is a region located in the outlet port 12b and includes a terminal end of the discharge flow path FP. According to the embodiment, the rectification region FPa also includes a region between the side wall 32 and the protrusion 31, which is located at a position adjacent to the side wall 32. The rectification region FPa is a region for guiding the liquid sprayed onto the heat dissipation surface 30a to the terminal end region FPb. The rectification region FPa is accessible from the opening 12a of the housing 10. The liquid having entered the opening 12a is sprayed onto the rectification region FPa and flows through the discharge flow path FP in the rectification region FPa to be guided to the connecting end region FPb.The terminal end portion FPb is a portion for discharging the liquid that has entered the opening 12a to the outside of the opening 12a (the outside of the housing 10). The terminal end portion FPb is located in a partial area of ​​an outer peripheral portion of the heat sink 30 and is formed to protrude from the rectification portion FPa.

[0023] According to the embodiment, the terminal end portion FPb, which is a portion including a terminal end of the discharge flow path FP, is disposed in the outlet port 12b of the casing 10. The terminal end of the discharge flow path FP is exposed from the outlet port 12b, and the liquid that has entered the port 12a is directly discharged from the terminal end of the discharge flow path FP to the outside of the port 12a (the outside of the casing 10) via the rectification portion FPa. That is, in the vehicle display device 100 according to the embodiment, the terminal end portion FPb is formed so that the liquid flowing along the discharge flow path FP (the terminal end portion FPb) does not come into contact with the casing 10. With this configuration, it is possible to prevent the liquid from intruding into the casing portion HS between the casing 10 and the heat sink 30.

[0024] Furthermore, in a state where the casing 10 is mounted on the vehicle 200, the heat sink 30 is fixed to the casing 10 with the heat dissipation surface 30a inclined so that the terminal end of the discharge flow path FP faces downward. That is, in a state where the casing 10 is mounted on the vehicle 200, the heat dissipation surface 30a is inclined so that the terminal end of the discharge flow path FP faces downward with respect to a horizontal plane orthogonal to the vertical direction of the vehicle 200. The inclination angle of the heat dissipation surface 30a with respect to the horizontal plane orthogonal to the vertical direction of the vehicle 200 is suitably set to an inclination angle at which the liquid that has entered the opening 12a flows smoothly from the rectification region FPa toward the terminal end region FPb.In order to utilize the liquid on the heat dissipation surface 30a for cooling the heat sink 30, the inclination angle of the heat dissipation surface 30a may also be set to an angle at which the residence time of the liquid on the heat dissipation surface 30a can be ensured to a certain extent.

[0025] According to the embodiment, each protrusion 31 is formed in a plate shape extending along the direction in which the heat dissipation surface 30a is inclined. In the direction along which each protrusion 31 extends, one end of each protrusion 31 on the terminal end portion FPb side (a lower end of each protrusion 31 in the direction in which the heat dissipation surface 30a is inclined) is separated from the side wall 32 of the heat sink 30. The fluid flowing between adjacent protrusions 31 merges after passing between the ends of the protrusions 31 on the terminal end portion FPb side and the side wall 32, and reaches the terminal end portion FPb (the terminal end of the dissipation flow path FP).

[0026] As in Fig. 6 and Fig. As shown in Figure 7, the heat sink 30 is attached to the image display device 20, with a surface (a mounting surface) opposite the heat dissipation surface 30a in contact with the image display device 20. In the embodiment, the image display device 20 includes a main body 21 containing a liquid crystal display section and a light source of a backlight unit, and a casing 22 accommodating the main body 21. In the image display device 20 according to the embodiment, the casing 22 is a box-shaped member having an opening on one surface and accommodating the liquid crystal display section and the light source of the backlight unit in such a manner that the display surface of the liquid crystal display section is exposed from the opening. The light source is accommodated in the casing 22 and constitutes the backlight unit.The light source of the backlight unit is arranged at a position opposite the rear surface to the display surface of the liquid crystal display section in the housing 22.

[0027] As in Fig. As shown in Figure 8, the heat sink 30 is fixed to a rear part of the case 22 (a part of the case 22 on a side opposite to a part where the display surface of the liquid crystal display section is exposed). The heat sink 30 is fixed to the case 22 with a fixing member such as a screw. The case 22 is made of, for example, a resin material. Note that the case 22 may also be made of a metal material with high thermal conductivity, such as aluminum. In this case, the heat generated by the light source of the backlight unit and the like can be efficiently transferred to the heat sink 30.

[0028] As described above, the reflection element RM according to the embodiment is provided in the vehicle display device 100. As shown in Fig. As shown in Figure 2, the reflection element RM is a flat mirror, and the reflection surface that reflects the display light Lt is formed as a flat surface. The reflection element RM is arranged at a position facing the image display device 20. The reflection element RM reflects the display light Lt emitted by the image display device 20 toward a mirror 41 of the mirror device 40.

[0029] The mirror device 40 includes a mirror 41, a drive member 42, and a bearing member 43. The mirror 41 reflects the display light Lt reflected by the reflection member RM through the opening 12c toward the reflection surface 210a of the windshield 210. The mirror 41 according to the embodiment is a concave mirror and functions as a magnifying mirror. That is, the mirror 41 according to the embodiment magnifies the display image and reflects the magnified display image such that the display image displayed by the display light Lt after being reflected by the concave mirror 41 becomes relatively larger than the display image displayed by the display light Lt before being reflected by the mirror 41.

[0030] The mirror 41 includes a main body and a pair of rotating shafts protruding from respective side walls of the main body. In the embodiment, the main body is a substantially rectangular flat plate member whose longitudinal direction is a direction following a rotation axis of the mirror as viewed from the thickness direction of the main body.

[0031] The rotational axes of the mirror are arranged at a position of the rotation axis. The rotational axis is the center of rotation of the mirror 41. A central axis of each of the rotating shafts of the mirror lies on the rotational axis. According to the embodiment, the rotating shafts of the mirror protrude along the rotational axis from the respective side walls in the width direction of the main body. The driving member 42 is fixed to one of the rotating shafts, and the bearing member 43 is fixed to the other rotating shaft. The driving member 42 and the bearing member 43 are fixed to the lower housing 11 by fastening members such as screws, and the mirror 41 is fixed to the lower housing 11 via the driving member 42 and the bearing member 43.

[0032] The driving element 42 includes a motor and a power transmission element. The motor rotates an output shaft of the motor using electrical power supplied from a battery or the like of the vehicle 200. The power transmission element is a member that transmits driving force from the output shaft of the motor to the rotating shaft of the mirror. The power transmission element consists of, for example, a gear and the like. When the rotation of the output shaft of the motor is transmitted to the rotating shaft of the mirror 41 through the power transmission element, the main body of the mirror 41 rotates. With this configuration, the angle of the main body of the mirror 41 can be changed.

[0033] The control unit CR controls the image display device 20 to perform display control with respect to a display image (a virtual image) to be displayed by the vehicle display device 100. The control unit CR is also connected to the mirror device 40 and can adjust the angle of the main body of the mirror 41 by controlling the rotation of the motor of the mirror device 40. That is, the control unit CR can control the mirror device 40 to adjust the display position of the display image.

[0034] As described above, the vehicle display device 100 according to the embodiment includes the casing 10 mounted on the vehicle 200, the image display device 20 provided in the casing portion HS of the casing 10, and the heat sink 30 provided at a position to contact the image display device 20. The casing 10 has the opening 12a open upward in a state where the casing 10 is mounted on the vehicle 200, the heat sink 30 is fixed at a position to separate the casing portion HS and the opening 12a from each other in the casing 10, and has the heat dissipation surface 30a exposed from the casing 10 through the opening 12a, and the discharge flow path FP for discharging a liquid that has entered the opening 12a to the outside of the casing 10 is formed on the heat dissipation surface 30a.

[0035] In the vehicle display device 100 according to the embodiment, by forming the discharge flow path FP on the heat sink 30 for discharging the liquid that has entered the heat dissipation port 12a of the case 10 to the outside of the case 10, it is possible to efficiently achieve both the function of discharging the liquid that has entered the heat dissipation port 12a of the case 10 to the outside of the case 10 and the heat dissipation function of the heat sink 30. Moreover, since the liquid that has entered the heat sink 30 through the port 12a and splashed onto the heat sink 30 can be directly discharged to the outside of the case 10, it is possible to prevent the liquid from intruding into the case portion HS between the heat sink 30 and the case 10.Furthermore, the liquid on the heat dissipation surface 30a of the heat sink 30 can be discharged to the outside of the case 10 while being used to cool the heat sink 30, for example, by providing the discharge flow path FP on the heat dissipation surface 30a. Furthermore, by forming the discharge flow path FP on the heat sink 30, the liquid that has entered through the opening 12a can be discharged to the outside of the case 10 without forming a drainage path on the case 10, and the size of the case 10 can be reduced because it is not necessary to provide a discharge path on the case 10.

[0036] In the vehicle display device 100 according to the embodiment, the heat sink 30 has a plurality of protrusions 31 protruding from the heat dissipation surface 30a, and the dissipation flow path FP is formed as a groove-shaped portion between adjacent protrusions 31 on the heat dissipation surface 30a.

[0037] In the vehicle display device 100 according to the embodiment, since the discharge flow path FP is formed by the heat dissipation fins (the projections 31) of the heat sink 30, it is possible to discharge the liquid leaked from the opening 12a to the outside of the case and at the same time improve the heat dissipation efficiency of the heat sink 30.

[0038] In the vehicle display device 100 according to the embodiment, the housing 10 has the outlet port 12b which is an outlet for the liquid entered into the port 12a, and the discharge flow path FP includes the rectification region FPa which is a region between adjacent projections 31, and the terminal end region FPb which is a region located in the outlet port 12b and includes a terminal end of the discharge flow path FP.

[0039] In the vehicle display device 100 according to the embodiment, by directly discharging the liquid from the terminal end of the discharge flow path FP to the outside of the case 10 through the discharge port of the case 10, the liquid can be prevented from splashing between the case 10 and the heat sink 30. That is, it is possible to prevent the liquid from intruding into the case portion HS between the case 10 and the heat sink 30.

[0040] In the vehicle display device 100 according to the embodiment, in a state where the housing 10 is mounted on the vehicle 200, the heat dissipation surface 30a is inclined so that the terminal end of the dissipation flow path FP faces downward with respect to a horizontal plane orthogonal to a vertical direction of the vehicle 200.

[0041] In the vehicle display device 100 according to the embodiment, by inclining the heat dissipation surface 30a of the heat sink 30 toward the outlet port of the housing 10, the residence time of the liquid on the heat dissipation surface 30a is ensured to a certain extent, so that the heat sink 30 can be cooled by the liquid while the liquid can be discharged smoothly. Modification example

[0042] In the above-described embodiment, the configuration in which the image display device 20, the mirror device 40, the reflection element RM, and the control unit CR are mounted in the lower housing 11 was described as an example, but the present invention is not limited to this configuration. For example, the image display device 20, the mirror device 40, the reflection element RM, and the control unit CR may be mounted in the upper housing 12. Reference example

[0043] As a reference example different from the embodiment, it may be considered to provide a cover covering the opening 12a of the upper case 12 instead of forming the dissipation flow path FP on the heat sink 30. However, in this case, there is a possibility that heat may be trapped in a space between the heat dissipation surface 30a of the heat sink 30 and the cover, impairing the heat dissipation function in the vehicle display device. Furthermore, the cover increases the size of the case 10.

[0044] In contrast, in the vehicle display device 100 according to the embodiment, by providing the discharge flow path FP on the heat sink 30, the liquid can be discharged to the outside from the opening 12a even if it has entered the opening 12a. Therefore, the size of the housing 10 can be smaller than the configuration of the reference example in which the lid is provided on the upper housing 12.

[0045] The above embodiments may be implemented in a suitable combination.

[0046] The vehicle display device according to the present embodiment has an effect of efficiently fulfilling both the function of discharging a liquid entered into the heat dissipation port of the housing to the outside and the heat dissipation function of the heat sink. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] JP 2019- 166 852

[0002]

Claims

[1] Vehicle display device (100) comprising: a housing (10) mounted on a vehicle (200); an image display device (20) provided in a housing portion (HS) of the housing (10); and a heat sink (30) provided at a position to contact the image display device (20), wherein the housing (10) has an opening (12a) which is open upwards in a state in which the housing (10) is mounted on the vehicle (200), the heat sink (30) is fixed at a position to separate the housing section (HS) and the opening (12a) from each other in the housing (10), and has a heat dissipation surface (30a) exposed from the housing (10) through the opening (12a), and a discharge flow path (FP) for discharging a liquid having entered the opening (12a) to an outside of the housing (10) is formed on the heat dissipation surface (30a). [2] Vehicle display device (100) according to claim 1, wherein the heat sink (30) has a plurality of projections (31) projecting from the heat dissipation surface (30a), and the dissipation flow path (FP) is formed as a groove-shaped section between adjacent projections (31) on the heat dissipation surface (30a). [3] Vehicle display device (100) according to claim 2, wherein the housing (10) has an outlet opening (12b) which is an outlet for the liquid entering the opening (12a), and the discharge flow path (FP) has a rectification region (FPa), which is a region between adjacent projections (31), and a terminal end region (FPb), which is a region arranged in the outlet opening (12b) and comprising a terminal end of the discharge flow path (FP). [4] The vehicle display device (100) according to any one of claims 1 to 3, wherein, in a state where the housing (10) is mounted on the vehicle (200), the heat dissipation surface (30a) is inclined such that the terminal end of the dissipation flow path (FP) faces downward with respect to a horizontal plane orthogonal to a vertical direction of the vehicle (200).

Images