Vehicular display device

Abstract

To provide a vehicular display device capable of displaying an image with excellent visibility while achieving a viewpoint of the image positioned farther separated from a driver and reduction in parallax.SOLUTION: A vehicular display device comprises: a hood disposed in front of a driver seat of a vehicle; a windshield that separates the outside and inside of the vehicle from each other; and an image display unit that is disposed outside the vehicle, displays a real image, and allows display light of the real image to pass through the windshield to allow an occupant to visually recognize the real image. Therein the image display unit is placed on a surface of the hood outside the vehicle, or at least partially disposed below the surface of the hood.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a display device for a vehicle. [Background technology]

[0002] In conventional vehicles, the image display unit for the speedometer and other instruments was placed behind the steering wheel (at the back from the driver's perspective). By placing this unit on the steering wheel, a top-mounted meter has been proposed, which reduces the parallax with the driver's viewpoint looking forward through the windshield and makes the viewpoint a distant viewpoint.

[0003] In a top-mounted meter, the driver directly views the image displayed on the image display unit, that is, the driver views the actual image displayed on the image display unit.

[0004] However, the parallax in the image display on the top mounted meter is still large, and there has been a demand for further reduction in the parallax and for the viewpoint to be shifted to a more distant viewpoint.

[0005] Patent Document 1 discloses a display device capable of providing a distant viewpoint. Specifically, it discloses that display light is emitted from a main body provided inside the hood of a vehicle, and the display light is reflected and incident on the windshield, thereby displaying a virtual image that can be observed through the windshield. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP2008-256767A Summary of the Invention [Problem to be solved by the invention]

[0007] The technology described in Patent Document 1 allows the image to be viewed from a farther distance and reduces parallax compared to using a top-mounted meter, but there is a problem in that the image resolution is low and visibility is poor because a virtual image is viewed through the windshield. Furthermore, there is a problem in that it becomes difficult to see the virtual image when using polarized sunglasses.

[0008] An object of the present disclosure is to provide a vehicle display device that can display an image with excellent visibility while providing a distant viewpoint for the image and reducing parallax. [Means for solving the problem]

[0009] The present disclosure is as follows.

[0010] The vehicle display device of the present disclosure (1) includes a bonnet disposed in front of a driver's seat of a vehicle, A windshield separating the exterior and interior of the vehicle; an image display unit disposed outside the vehicle and configured to display a real image and transmit a display light of the real image through the windshield to allow a passenger to visually recognize the real image; The image display unit relates to a vehicle display device that is placed on a surface of the bonnet outside the vehicle, or at least a portion of which is disposed below the surface of the bonnet.

[0011] The vehicle display device of the present disclosure (2) relates to the vehicle display device according to the present disclosure (1), in which a dark color portion and a transparent portion that transmits the display light are provided on a lower edge of the windshield.

[0012] The vehicle display device of the present disclosure (3) relates to the vehicle display device according to the present disclosure (1) or (2), further comprising a bracket for covering a top surface of the image display unit.

[0013] The vehicle display device of the present disclosure (4) relates to the vehicle display device according to the present disclosure (1) or (2), in which the hood covers a top surface of the image display unit.

[0014] The vehicle display device of the present disclosure (5) relates to the vehicle display device according to any one of the present disclosures (1) to (4), in which the display light is unpolarized light.

[0015] The vehicle display device of the present disclosure (6) further includes a projection unit that is provided in a cabin of the vehicle and projects an image toward the windshield, The present invention relates to a display device for a vehicle according to any one of the present disclosures (1) to (5), which allows a passenger to visually recognize a virtual image obtained by reflecting the projection light projected from the projection unit on the windshield. Effect of the Invention

[0016] The present disclosure makes it possible to provide a vehicle display device that can display an image with excellent visibility while shifting the viewpoint of the image to a distant viewpoint and reducing parallax. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a cross-sectional view that illustrates a schematic example of a configuration of a vehicle display device according to the present disclosure. [Diagram 2] FIG. 2 is a cross-sectional view that shows a schematic example of the configuration of a vehicle display device for comparison, in which an image display unit that displays a real image is provided inside the vehicle. [Diagram 3] FIG. 3 is an explanatory diagram that illustrates a real image and scenery that are visually recognized from inside a vehicle equipped with a vehicle display device. [Figure 4] FIG. 4 is a cross-sectional view that illustrates a schematic configuration of another example of the vehicle display device of the present disclosure. [Diagram 5] FIG. 5 is a cross-sectional view that illustrates a schematic configuration of another example of the vehicle display device according to the present disclosure. [Figure 6] FIG. 6 is a cross-sectional view that illustrates a schematic configuration of another example of the vehicle display device of the present disclosure. [Figure 7] FIG. 7 is an explanatory diagram that illustrates a real image and a scene that are visually recognized from inside a vehicle equipped with another example of a display device for a vehicle. [Figure 8]FIG. 8 is an explanatory diagram that illustrates a real image and a scene that are visually recognized from inside a vehicle equipped with another example of a display device for a vehicle. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] A vehicle display device according to an embodiment of the present disclosure will be described with reference to the drawings.

[0019] The vehicle display device of the present disclosure includes a hood disposed in front of a driver's seat of a vehicle, A windshield separating the exterior and interior of the vehicle; an image display unit disposed outside the vehicle and configured to display a real image and transmit a display light of the real image through the windshield to allow a passenger to visually recognize the real image; The image display unit is a vehicle display device that is placed on a surface of the bonnet outside the vehicle, or at least a portion of which is disposed below the surface of the bonnet.

[0020] In the following description, the width direction of the vehicle is also referred to as the X direction, the front-rear direction of the vehicle is also referred to as the Y direction, and the height direction of the vehicle is also referred to as the Z direction. Coordinate axes indicating the XYZ directions are shown where necessary in each drawing. The front of the vehicle is the +Y direction, and the rear of the vehicle is the -Y direction.

[0021] FIG. 1 is a cross-sectional view that illustrates a schematic example of a configuration of a vehicle display device according to the present disclosure. FIG. 1 shows a cross-sectional view from the side of the vehicle. The vehicle display device 1 shown in Figure 1 includes a bonnet 20 arranged in front of the driver's seat 10 of the vehicle 100 (in the +Y direction), a windshield 30 separating the exterior 101 from the interior 102 of the vehicle, and an image display unit 40 arranged on the exterior 101 of the vehicle. In the vehicle display device 1 shown in FIG. 1, the image display unit 40 is placed on the surface 21 of the hood 20 outside the vehicle 101.

[0022] The bonnet is provided in front of the driver's seat of the vehicle, and the surface of the bonnet is a surface that has a certain area in a plane formed by the width direction and the front-rear direction of the vehicle (XY plane). The bonnet may be openable and closable, and a space may be provided below the bonnet (in the -Z direction). The use of the space under the bonnet is not particularly limited, but it may be used to place vehicle parts such as an engine or a motor, or it may be used as a space for storing luggage. In addition, the bonnet does not necessarily have to be able to be opened or closed, and it does not necessarily have to have a space therein. The name of the bonnet varies depending on the language and region, and it is sometimes called a "hood."

[0023] The windshield is provided in front of the driver's seat and separates the inside and outside of the vehicle. The windshield may be a single-pane glass or a laminated glass, but the laminated glass is preferable. The windshield may also be glass that can be used for a head-up display, which will be described later.

[0024] As the front glass, in addition to soda-lime silicate glass as specified in ISO16293-1, glass having a known glass composition such as aluminosilicate glass, borosilicate glass, and non-alkali glass can be used. In the case of laminated glass, it is preferable to have a resin interlayer between the first glass sheet and the second glass sheet. Examples of the resin interlayer that can be used include polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), acrylic resin (PMMA), urethane resin, polyethylene terephthalate (PET), and cycloolefin polymer (COP).

[0025] The image display unit may be placed on the surface of the hood outside the vehicle. The image display unit is a display device that displays a real image, and an information display device such as a liquid crystal display or an organic EL display can be used. The passenger visually recognizes the display light of a real image that is displayed on the image display unit and transmitted through the windshield. If the image display unit is located on the surface of the bonnet, it will block part of the forward visibility, so it is preferable that the installation position and size of the image display unit be determined so as not to violate laws and regulations regarding forward visibility in the country or region in which the vehicle is used. For example, in Japan, it is preferable to meet the provision in the "Safety Standards for Road Transport Vehicles" issued by the Ministry of Land, Infrastructure, Transport and Tourism, which states that "a cylinder 1m high and 0.3m in diameter (representing a 6-year-old child) located 2m in front of the vehicle can be directly seen without the use of mirrors or other devices."

[0026] The type of display light displayed on the image display unit is not particularly limited, and may be polarized light (P-polarized, S-polarized, circularly polarized, or elliptically polarized) or unpolarized light, but is preferably unpolarized light. If the display light is unpolarized light, it can be viewed even when using polarized sunglasses.

[0027] If the image display unit is disposed outside the vehicle in front of the driver's seat, the image can be viewed from a distant viewpoint and parallax can be reduced. In addition, since a real image is viewed, the image visibility is superior to that of a virtual image. Another advantage is that no ghost images are generated because transmitted light is viewed instead of a reflected image. That is, it is possible to provide a vehicle display device that can display an image with excellent visibility while providing a distant viewpoint for the image and reducing parallax.

[0028] The above-mentioned effects of the vehicle display device of the present disclosure will be described in comparison with a case where an image display unit that displays a real image is provided inside the vehicle cabin (similar to an image display in a top-mounted meter).

[0029] FIG. 1 shows an arrow drawn forward (in the +Y direction) from the passenger's viewpoint 50 (eye point). This direction is defined as the passenger's forward line of sight. A line is drawn connecting this forward line of sight, the viewpoint 50, and the image display unit 40 (the center of the image display unit in the height direction), and this line is defined as the incident line of the image. The angle between the forward line of sight and the incident line is defined as α (°). The smaller this angle α, the less line of sight movement there is, and the less parallax there is. Furthermore, the distance in the Y direction between the viewpoint 50 and the image display unit 40 is defined as the viewpoint distance Yα. In this specification, the term "viewpoint" refers to the position when viewing an object, and does not mean the "point of gaze" or where one is looking.

[0030] FIG. 2 is a cross-sectional view that shows a schematic example of the configuration of a vehicle display device for comparison, in which an image display unit that displays a real image is provided inside the vehicle. In the vehicle display device 1' shown in FIG. 2, the image display unit 40 is provided on a dashboard 103 inside the vehicle. In FIG. 2, the angle β between the forward line of sight and the line of incidence, and the viewpoint distance Yβ are defined in the same manner as in FIG.

[0031] Comparing the angles and viewpoint distances in FIG. 1, the angle α in FIG. 1 is smaller than the angle β in FIG. 2, and the parallax is reduced by disposing the image display unit outside the vehicle. Also, with regard to the viewpoint distance, the viewpoint distance Yα in FIG. 1 is longer than the viewpoint distance Yβ in FIG. 2, and a distant viewpoint is achieved by disposing the image display unit outside the vehicle.

[0032] Information that is preferably displayed on the video display unit includes information that is preferably displayed clearly by taking advantage of its high visibility, such as map information, traffic congestion information, and information about nearby stores, and other small text information. It is also preferable to display a monitor that displays images from a camera showing the outside of the vehicle (front, rear, sides, etc.) that are in the blind spot from the driver's seat, or images from an electronic side mirror. Furthermore, a plurality of image display sections may be provided to display divided images. For example, an image display section showing an image of the rear, and an image display section showing images of the right and left sides may be arranged side by side. Alternatively, a plurality of image display sections may be provided to display divided images. For example, an image display section for displaying an image of the rear, and an image display section for displaying images of the right and left sides may be arranged side by side. In addition, if the image from a camera installed in the front bumper is projected from the left pillar to the right pillar, it is possible to project an image in which the bonnet can be seen through. In this case, too, the image display unit may be divided into multiple parts for display.

[0033] The image display unit may display information that is often displayed on a top-mounted meter, such as speed, warning indications, remaining fuel, date and time, and distance traveled. The video display unit may also display information that is often displayed on an in-vehicle display, such as audio, TV, internet screen, and air conditioning adjustment. The operation of switching between these information displays may be performed using a button or touch pad attached around the steering wheel. Note that this does not prevent the video display unit from displaying simple information that does not require a clear display.

[0034] It is preferable that the windshield has a darkened area around its periphery, and particularly preferably around the lower edge of the windshield. It is also preferable that the lower edge of the windshield is provided with a dark colored portion and a transparent portion through which the display light passes. The dark color portion may be a colored ceramic layer, a colored resin layer, a shade band, or the like.

[0035] The colored ceramic layer is a layer formed by printing a colored ceramic layer printing ink on a glass plate and firing the ink, and is a black or dark colored opaque layer. The colored resin layer is a resin layer separate from the resin interlayer provided between the glass sheets in the laminated glass, and is a black or dark colored opaque resin layer made by incorporating a black or dark colored dye or pigment into the resin. A shade band is a layer obtained by coloring a part of a resin interlayer in laminated glass in a band shape with a pigment or dye, and has a gradation between transparent and opaque areas.

[0036] FIG. 3 is an explanatory diagram that illustrates a real image and scenery that are visually recognized from inside a vehicle equipped with a vehicle display device. 3 shows that a dark color portion 60 is provided around the periphery of the windshield 30. At the bottom side 31 of the windshield 30, a transparent portion 61 is provided that is transparent and does not have the dark color portion 60, and the transparent portion 61 can transmit display light. Since the image display unit 40 is provided at a position corresponding to the transparent portion 61, the passenger can view the image displayed on the image display unit 40 through the transparent portion 61.

[0037] In order to have both a dark color portion and a transparent portion at the bottom edge of the windshield, the position of the dark color portion may be adjusted. For example, when a colored ceramic layer is provided as the dark color portion, the printing portion of the ink for printing the colored ceramic layer may be adjusted so that the ink for printing the colored ceramic layer is printed while avoiding the position where the transparent portion is to be formed.

[0038] If the exterior surface of the windshield becomes covered with water droplets or becomes dirty, it becomes difficult for passengers to see the display light of the real image displayed on the image display unit. For areas where the display light of the real image passes through the windshield, measures such as wiping off water droplets with the windshield wipers are taken to prevent a decrease in the visibility of the real image displayed on the image display unit. In addition, the positional relationship between the wiper drive range and the image display unit is adjusted so that the wiper does not interfere with (clash with) the image display unit when driven.

[0039] Preferred dimensions and the like of the vehicle display device of the present disclosure will be described with reference to FIGS. The distance between the viewpoint and the image display unit (viewpoint distance Yα) shown in Fig. 1 is preferably 900 to 1500 mm. Also, the angle α between the forward line of sight and the line of incidence shown in Fig. 1 is preferably 5 to 15°. In addition, the position and viewpoint of the passenger when determining the viewpoint distance Yα and angle α may be based on the "Reference Eye Point" in Article 21, Appendix 29 of the Road Transport Vehicle Safety Standards.

[0040] The distance Yγ between the image display unit and the front end of the windshield is preferably 80 to 200 mm. Furthermore, in order to implement the vehicle display device of the present disclosure, it is preferable for the vehicle model to have a long fore-and-aft length of the bonnet (length in the Y direction), and it is preferable for the fore-and-aft length of the bonnet, measured as the distance from the front end of the windshield to the front end of the vehicle, to be 500 mm or more.

[0041] The height of the dark color portion at the bottom edge of the windshield (the dimension indicated by the double-headed arrow Zα in FIG. 3) is preferably 50 to 150 mm. The width of the transparent portion (the dimension indicated by the double-headed arrow Xα in FIG. 3) is preferably 150 to 1600 mm. The image display section preferably has a vertical dimension (dimension indicated by double-headed arrow Zβ in FIG. 3) of 50 to 150 mm, and a horizontal dimension (dimension indicated by double-headed arrow Xβ in FIG. 3) of 150 to 1600 mm. When a dark portion and a transparent portion are provided on the windshield and the image display portion is viewed through the transparent portion, it is preferable that the transparent portion and the image display portion are the same size when viewed from the passenger's perspective, and that no gap (part of the transparent portion) is visible between the image display portion and the dark portion. The image display section may be divided into multiple sections. When the image display section is divided into multiple sections, the dimensions are determined based on the dimensions of a rectangle that includes the entire image display section.

[0042] The vehicle display device of the present disclosure may further be provided with a bracket that covers the top surface of the image display unit. FIG. 4 is a cross-sectional view that illustrates a schematic configuration of another example of the vehicle display device of the present disclosure. In the vehicle display device 2 shown in FIG. 4, a bracket 70 that covers the top surface 41 of the image display unit 40 is provided. The top surface 41 of the image display unit 40 is not the image display surface 42 that displays a real image in the image display unit 40, but a surface that corresponds to the side surface of the image display unit 40, and which becomes the upper surface when the image display unit 40 is installed in the vehicle 100.

[0043] The image display unit 40 is placed on the surface 21 of the bonnet 20 . Bracket 70 protrudes upward (in the +Z direction) beyond surface 21 of bonnet 20, and covers top surface 41 of image display unit 40. Its shape, in the cross section from the side shown in Fig. 4, is an L-shaped cross section with a wall surface 71 in front of image display unit 40, and a visor 72 protruding from wall surface 71 toward the rear of the vehicle (in the -Y direction) and covering top surface 41 of image display unit 40. The bracket 70 prevents rain (water droplets) from adhering to the image display surface 42 and prevents the image display surface 42 from becoming dirty. It also prevents flying stones, insects, etc. from directly colliding with the image display portion while the vehicle is traveling.

[0044] If the eaves 72 protrude farther rearward of the vehicle, the effect of providing the bracket is more pronounced, but if the protrusion is too great, the eaves get in the way and make it difficult for the occupant to see the display light from the image display unit 40. If the eaves protrude farther, it is preferable to give the eaves an elevation angle so that they do not interfere with the occupant's visibility. On the other hand, if the direction of sunlight and the direction of the image display unit are in a positional relationship such that the sunlight is irradiated toward the image display unit, the sunlight may be reflected by the image display unit and make it difficult to see the real image, but if the eaves are provided protrudingly, the image display unit can be in the shadow of the eaves, preventing the sunlight from being reflected by the image display unit and improving the visibility of the real image. From these perspectives, it is preferable that the amount of protrusion of the eaves (indicated by the double-headed arrow Yδ in FIG. 4) is 80 to 150 mm. The amount of protrusion of the eaves is defined as the dimension that protrudes rearward from the image display surface of the vehicle. This amount of protrusion of the eaves is preferable because it makes it easier for the image display unit to be in the shadow of the eaves even during the winter solstice, when the meridian altitude of sunlight is low and sunlight is irradiated at a low angle.

[0045] In the vehicle display device of the present disclosure, the hood may cover the top surface of the image display unit. FIG. 5 is a cross-sectional view that illustrates a schematic configuration of another example of the vehicle display device according to the present disclosure. In the vehicle display device 3 shown in FIG. 5, a part of the plate material constituting the bonnet 20 curves upward to cover the top surface 41 of the image display unit 40. In this embodiment, the image display unit 40 is not placed on the surface 21 of the bonnet 20 , but is disposed below the surface 21 of the bonnet 20 . Although the image display unit 40 is fixed to a support member 23 provided inside the bonnet, there is no limitation on the arrangement of the image display unit 40. For example, the image display unit 40 may be suspended from the underside of a plate material of the bonnet 20, and the position of the image display unit 40 may be fixed.

[0046] A portion of the bonnet 20 protrudes rearward (-Y direction) of the vehicle to form a eaves 22 that covers the top surface 41 of the image display unit 40. The effect of providing the eaves that cover the top surface of the image display unit is the same as in the above embodiment in which the bracket is provided, and the preferred range of the amount of protrusion of the eaves can also be the same.

[0047] FIG. 6 is a cross-sectional view that illustrates a schematic configuration of another example of the vehicle display device of the present disclosure. In the vehicle display device 4 shown in FIG. 6, a part of the plate material constituting the bonnet 20 curves upward to cover the top surface 41 of the image display unit 40, and the eaves 22 of the bonnet 20 extends to the vicinity of the windshield 30. The image display unit 40 is fixed onto the wiper cowl top panel 24 , and in this case too, is disposed below the surface 21 of the bonnet 20 . In order to enable the bonnet 20 to be opened and closed, it is advisable to separate a lid portion 25, which is a portion of the bonnet 20 that can be opened and closed, and a visor 22, which is a portion of the bonnet 20 that cannot be opened, on the front side of the vehicle relative to the image display unit 40. In this embodiment, the bonnet 20 is composed of the lid portion 25 and the visor 22. In the vehicle display device having the configuration shown in FIG. 6, the hood eaves may be in contact with the windshield, or there may be a gap between the hood eaves and the windshield.

[0048] When the image display unit is installed below the surface of the bonnet, the position of the image display unit may be determined so that the real image displayed on the image display unit can be viewed by the passenger through the windshield. Furthermore, when the bonnet covers the top surface of the image display unit, it is necessary to curve the plate material upward only in a portion of the width of the bonnet that corresponds to the position of the image display unit, and the plate material constituting the bonnet does not need to be curved upward in positions where the image display unit is not provided.

[0049] When a canopy is provided to cover the top surface of the image display unit, as in the vehicle display device shown in Figures 4, 5, and 6, the positional relationship between the wiper driving range and the canopy is adjusted so that the wiper does not interfere with (clash with) the canopy and the image display unit when driven.

[0050] The vehicle display device of the present disclosure may further include a projection unit that is provided inside the vehicle cabin and projects an image toward the windshield, and may be configured to allow an occupant to view a virtual image obtained by reflecting light projected from the projection unit on the windshield.

[0051] FIG. 7 is an explanatory diagram that illustrates a real image and a scene that are visually recognized from inside a vehicle equipped with another example of a display device for a vehicle. 7, the vehicle display device 5 is provided in the interior of the vehicle and further includes a projection unit 80 that projects an image toward the windshield 30. Projection light projected from the projection unit 80 is reflected by the windshield, and a virtual image 110 is visually recognized by the passenger.

[0052] As a mechanism for projecting an image by the projection unit and observing a virtual image, a head-up display (hereinafter, the head-up display is also abbreviated as HUD) system can be used. Examples of head-up display systems include polarized HUD types, such as a P-HUD type that irradiates projected light containing a P-polarized component, and an S-HUD type that irradiates projected light containing an S-polarized component, and a wedge HUD type that uses laminated glass with a wedge angle profile, but the type of HUD used in the vehicle display device of the present disclosure is not particularly limited.

[0053] When the windshield is a laminated glass, a polarized HUD can be obtained by providing a resin interlayer between the first glass plate and the second glass plate and providing a retardation layer between the first glass plate and the second glass plate. After providing the retardation layer, it is preferable to irradiate the projection light to the indoor main surface (fourth main surface) of the laminated glass at the Brewster angle. In addition, it is preferable that the incident angle of the projection light to the fourth main surface is (Brewster angle -10°) or more and (Brewster angle +10°) or less. With this configuration, the occurrence of ghosts can be suppressed.

[0054] Furthermore, when a retardation layer is provided between the first glass plate and the second glass plate, the positional relationship may be such that the display light of the real image passes through the retardation layer. However, it is preferable that the display light of the real image is unpolarized light, since it is not affected by the retardation layer.

[0055] The display area of ​​the virtual image 110 may be located high on the windshield 30, i.e., close to the line of sight ahead, and the virtual image 110 may be an image with reduced parallax at a distant viewpoint. Even if the virtual image 110 is seen close to the line of sight ahead, the presence of this virtual image does not violate laws and regulations regarding forward visibility. However, since the virtual image has poor visibility, it is suitable for displaying simple information (such as speed indications and warnings) that does not require a very clear display.

[0056] FIG. 8 is an explanatory diagram that illustrates a real image and a scene that are visually recognized from inside a vehicle equipped with another example of a display device for a vehicle. 8, the vehicle display device 6 is provided in the interior of the vehicle and further includes a projection unit 80 that projects an image toward the windshield 30. Projection light projected from the projection unit 80 is reflected by the windshield, and a virtual image 110 is visually recognized by the passenger.

[0057] In the vehicle display device 6 shown in FIG. 8, the projection position of the virtual image 110 is a position that overlaps with the dark color portion 60, and the virtual image 110 is observed with the dark color portion 60 as a background. The dark area 60 in the background of the virtual image 110 has the advantage that the virtual image 110 is easier to see than when the transparent area of ​​the windshield is used as the background. However, the parallax is larger than when the virtual image is displayed at a position such as that shown in FIG. On the other hand, if virtual image 110 is displayed at a position overlapping with dark portion 60 at the bottom edge of the windshield, and the real image of image display unit 40 is displayed at a position corresponding to transparent portion 61, this has the advantage that the amount of eye movement required when viewing virtual image 110 and the real image of image display unit 40 is reduced.

[0058] When a virtual image obtained by reflecting the projection light from the projection unit on the windshield and a real image displayed on the image display unit are both viewed by the passenger, the positions of the virtual image and the real image as seen by the passenger may or may not overlap. The examples shown in Figures 7 and 8 are examples in which the positions of the virtual image and the real image do not overlap. [Explanation of symbols]

[0059] 1, 1´, 2, 3, 4, 5, 6 Vehicle display device 10 Driver's seat 20. Bonnet 21 Bonnet surface 22 Hood visor 23 Support member 24 Wiper cowl top panel 25 Bonnet lid 30 Windshield 31 Bottom edge of windshield 40 Video display section 41 Top of the image display 42 Image display surface of image display unit 50 Passenger's Viewpoint 60 Dark area 61 Transparent part 70 Bracket 71 Bracket wall 72 Bracket eaves 80 Projection section 100 vehicles 101 Vehicle exterior 102 Vehicle Interior 103 Dashboard 110 Virtual Image

Claims

1. A bonnet disposed in front of the driver's seat of the vehicle; A windshield separating the exterior and interior of the vehicle; an image display unit disposed outside the vehicle and configured to display a real image and transmit a display light of the real image through the windshield to allow a passenger to visually recognize the real image; The image display unit is placed on a surface of the bonnet outside the vehicle, or at least a portion of the image display unit is disposed below the surface of the bonnet.

2. The display device for a vehicle according to claim 1 , wherein a dark color portion and a transparent portion through which the display light passes are provided on a lower side of the windshield.

3. The display device for a vehicle according to claim 1 or 2, further comprising a bracket for covering a top surface of the image display unit.

4. The display device for a vehicle according to claim 1 or 2, wherein the hood covers a top surface of the image display unit.

5. The display device for a vehicle according to claim 1 , wherein the display light is unpolarized light.

6. A projection unit is provided in a passenger compartment of the vehicle and projects an image toward the windshield. The display device for a vehicle according to claim 1 , wherein a virtual image obtained by reflecting light projected from the projection unit by the windshield is visually recognized by a passenger.

Images