Display device for vehicle

Abstract

Provided are: a display unit (10); a flat mirror (20) that reflects display light from a display (11); a first concave mirror (30) that reflects the reflected light of the flat mirror; and a second concave mirror (40) that reflects the reflected light of the first concave mirror and projects it toward a projection target (Rwf) from an exit port (70a) of an outer housing. The outer housing is provided with: a lower housing (70A) that has an entrance port (70b) for allowing display light from a display of the display unit fixed to an outdoor portion to enter an indoor portion, holds the flat mirror and the second concave mirror in the indoor portion, and is fixed to a vehicle body; a lower cover (70B) that houses the display unit and is fixed to the lower housing; and an upper housing (70C) that has the exit port, is fixed to the lower housing, and holds the first concave mirror between the upper housing and the lower housing. An inner housing (80) is fixed to the lower housing in the indoor portion of the lower housing and holds the flat mirror between the inner housing and the lower housing.

Description

Technical Field

[0001] This invention relates to a display device for vehicles. Background Technology

[0002] Conventionally, vehicles have been equipped with vehicle display devices that display information provided to passengers inside the vehicle as virtual images. These vehicle display devices are so-called head-up displays (HUDs) and include: a display unit that emits display light as display information projected onto a projection unit; a reflective member that reflects the display light emitted from the display unit's display and projects the display light onto the projection unit; and a housing that houses the aforementioned components. This vehicle display device projects the display light reflected by the reflective member onto the projection unit outside the housing, allowing passengers to visually perceive the display information corresponding to the projected display light as a virtual image. For example, such a vehicle display device is disclosed in Patent Document 1 below.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2020-148950 Summary of the Invention

[0006] The technical problem that the invention aims to solve

[0007] However, in vehicle display devices, to extend the viewing distance, the number of reflective components within the housing is increased, thereby extending the optical path length produced by the optical components. For example, in Patent Document 1 mentioned above, a plane mirror and two aspherical mirrors are arranged within the housing. However, in vehicle display devices, the more reflective components there are, the more difficult it becomes to ensure the display quality of the virtual image if the positional accuracy between them is not improved.

[0008] Therefore, the object of the present invention is to provide a vehicle display device that can extend the viewing distance while ensuring quality.

[0009] Technical means for solving problems

[0010] The present invention is characterized by comprising: an outer shell; an inner shell disposed within the outer shell; a display unit that emits display information, which is visually perceived as a virtual image by a passenger in the vehicle interior, as display light into the outer shell; a plane mirror that reflects the display light emitted from the display of the display unit within the outer shell; a first concave mirror that reflects the display light reflected by the plane mirror within the outer shell; and a second concave mirror that reflects the display light reflected by the first concave mirror within the outer shell, thereby projecting the display light from an outlet of the outer shell onto a projection portion within the vehicle interior. The device comprises: a lower housing having an inlet for light emitted from the display of the display unit fixed outdoors to the interior, the lower housing holding the plane mirror and the second concave mirror inside the interior, and the lower housing being fixed to the vehicle body; a lower cover housing the display unit outdoors of the lower housing and being fixed to the lower housing; and an upper housing having the outlet and being fixed to the lower housing, and clamping the first concave mirror between the upper housing and the lower housing; an inner housing fixed to the lower housing inside the lower housing, and clamping the plane mirror between the inner housing and the lower housing.

[0011] Invention Effects

[0012] Because the vehicle display device of the present invention employs three reflective components (plane mirror, first concave mirror, and second concave mirror), high magnification can be achieved, and the optical path length in the housing (outer shell and inner shell) can be extended to achieve an extended viewing distance. On the other hand, due to the relatively long optical path length, it is difficult to ensure the display quality of the virtual image in this vehicle display device. However, the vehicle display device of the present invention uses aspherical mirrors (freeform mirrors) in two of its three reflective components (plane mirror, first concave mirror, and second concave mirror), thus ensuring the display quality of the virtual image. In addition, in the vehicle display device of the present invention, the plane mirror is sandwiched between the lower shell and the inner shell of the outer shell, the first concave mirror is sandwiched between the lower shell and the upper shell of the outer shell, and the second concave mirror is held in the lower shell. That is, in the vehicle display device of the present invention, all three reflective components (plane mirror, first concave mirror, and second concave mirror) are held by a single lower shell between them. Therefore, this vehicle display device can minimize the number of design tolerances related to the relative positional relationships of the three reflecting components (plane mirror, first concave mirror, and second concave mirror), and minimize the deviations between them caused by accumulated tolerances. Thus, the vehicle display device of the present invention can improve the positional accuracy between the plane mirror and the first concave mirror, and also improve the positional accuracy between the first and second concave mirrors, forming a high-precision optical path within the housing (outer shell, inner shell), thereby ensuring the display quality of the virtual image. Furthermore, the vehicle display device of the present invention fixes its lower shell to the vehicle body, thus improving the positional accuracy from the fixing point to each reflecting component (plane mirror, first concave mirror, and second concave mirror), and consequently, also improving the positional accuracy between the second concave mirror and the projected portion. Therefore, the vehicle display device of the present invention can improve not only the accuracy of the optical path reaching the housing (outer shell, inner shell), but also the accuracy of the optical path reaching the outside of the housing, thus ensuring the display quality of the virtual image. Thus, the vehicle display device of the present invention can extend the viewing distance while ensuring the display quality of the virtual image. Attached Figure Description

[0013] Figure 1 This is a schematic diagram illustrating a vehicle display device according to an embodiment.

[0014] Figure 2 This is a perspective view of a vehicle display device according to an embodiment.

[0015] Figure 3 This is an exploded perspective view of a vehicle display device according to an embodiment, showing the state after the outer casing is partially disassembled.

[0016] Figure 4 It is an exploded perspective view of the lower shell, lower cover, and display unit within the outer casing.

[0017] Figure 5 This is an exploded perspective view showing the three reflective components together with the inner housing.

[0018] Figure 6 This is a three-dimensional view showing the second concave mirror and its associated components.

[0019] Figure 7 It is an exploded perspective view showing the first inner housing together with the display unit and the plane mirror.

[0020] Figure 8 It is an exploded perspective view of the first inner casing together with the display unit and the plane mirror from other angles.

[0021] Figure 9 This is an exploded perspective view showing the second inner shell together with the first and second concave mirrors. Detailed Implementation

[0022] Hereinafter, embodiments of the vehicle display device of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] [Example]

[0024] based on Figures 1 to 9 An embodiment of the vehicle display device of the present invention will be described.

[0025] Figures 1 to 3 Reference numeral 1 in the accompanying drawings indicates a vehicle display device according to this embodiment. This vehicle display device 1 is a so-called head-up display device that displays information provided to passengers inside a vehicle (such as a car) as a virtual image. The vehicle display device 1 projects display light relating to the display information onto a projection portion Rwf, such as a windshield, inside the vehicle interior, and reflects the display light from the projection portion Rwf toward the passenger, thereby enabling the passenger to visually confirm the virtual image of the displayed information. Figure 1 ).

[0026] The vehicle display device 1 includes a display unit 10, which emits display information that is visually recognized as a virtual image by passengers inside the vehicle as display light into the outer casing 70 described below. Figure 1 as well as Figure 4 The display unit 10 includes a backlight (not shown) and a light-transmitting panel-shaped display 11, allowing illumination light from the backlight to pass through the display 11 and display light, which serves as the display information, to be emitted from the display 11. Figure 1 and Figure 4For example, as a display 11, a light-transmitting TFT liquid crystal (Thin Film Transistor Liquid Crystal Display) is used.

[0027] Furthermore, the vehicle display device 1 includes multiple reflective components that reflect display light emitted from the display 11 of the display unit 10 within the housing 70, and project the display light from the exit port 70a of the housing 70 onto the projection portion Rwf inside the vehicle interior. The reflective components of the vehicle display device 1 include a plane mirror 20, a first concave mirror 30, and a second concave mirror 40. Figure 1 , Figure 3 and Figure 5 ).

[0028] The plane mirror 20 reflects the display light emitted from the display 11 of the display unit 10 within the housing 70. The first concave mirror 30 reflects the display light reflected by the plane mirror 20 within the housing 70. The second concave mirror 40 reflects the display light reflected by the first concave mirror 30 within the housing 70, and projects the display light from the exit port 70a of the housing 70 onto the projected portion Rwf inside the vehicle interior. The first concave mirror 30 and the second concave mirror 40 are magnifying mirrors that amplify and reflect the incident display light. For example, aspherical mirrors (freeform mirrors) are used for the first concave mirror 30 and the second concave mirror 40, wherein the reflecting surface of the aspherical mirror is concave in an aspherical shape (freeform shape).

[0029] Here, the vehicle display device 1 includes a drive unit 50 that rotates the second concave mirror 40 to change the imaging position (display position) of the virtual image. Figure 1 , Figure 5 as well as Figure 6 Here, the second concave mirror 40 is rotated about a rotation axis in the vehicle width direction, causing the imaging position (display position) of the virtual image to change in the vertical direction of the vehicle. The drive unit 50 includes: a motor 51 as a drive source; a power transmission mechanism 52 that operates using the output of the motor 51; and a rotation shaft 53 that rotates the second concave mirror 40 about an axis in the vehicle width direction using the output of the motor 51 input via the power transmission mechanism 52. Figure 1 and Figure 6 ).

[0030] The power transmission mechanism 52 can also directly apply the rotational torque corresponding to the output torque of the motor 51 to the rotating shaft 53. Alternatively, the power transmission mechanism 52 can be a power conversion mechanism that converts the output torque of the motor 51 into a linear force, and applies this linear force to the second concave mirror 40, thereby rotating the rotating shaft 53, whose input point relative to the linear force is located at an eccentric position. This rotating shaft 53 can be disposed either on the second concave mirror 40 or on a holding member that holds the second concave mirror 40. The rotating shaft 53 can be formed in a cylindrical or cylindrical shape.

[0031] The power transmission mechanism 52 in this example is a power conversion mechanism that converts the output torque of the motor 51 into a linear force. It has an input section 52a on the side of the second concave mirror 40, into which the linear force is input. Figure 5 and Figure 6 Additionally, in this example, the second concave mirror 40 is held in the holding member 41. Figure 3 , Figure 5 and Figure 6 The holding member 41 is provided with a pair of coaxial rotating shafts 53 and an input section 52a disposed at an eccentric position relative to the pair of rotating shafts 53.

[0032] The drive unit 50 rotates the second concave mirror 40 about the rotation axis 53, thereby changing the incident angle of the display light reflected from the first concave mirror 30 toward the second concave mirror 40, and also changing the exit angle of the display light reflected from the second concave mirror 40 toward the projection unit Rwf. By changing the exit angle of the display light from the second concave mirror 40 toward the projection unit Rwf, the drive unit 50 changes the imaging position (display position) of the virtual image associated with the display light in the vertical direction of the vehicle.

[0033] The display light projected onto the projected portion Rwf is reflected from the projected portion Rwf to the eye point EP or the eye movement range EB, thereby being visually confirmed by the passenger as a virtual image. Figure 1 The eyepoint EP represents the position of a passenger's eyes inside the vehicle. The eye movement range EB represents the range of the eyepoint EP within which visual confirmation of a virtual image is possible.

[0034] The projected portion Rwf refers to the windshield (in this case, the front windshield Wf) itself or a part thereof. Figure 1Alternatively, the projected portion Rwf can be formed as a semi-transparent mirror, which receives the display light from the second concave mirror 40 via a reflective surface and reflects it to the eye point EP or eye movement range EB, and directs light from outside the vehicle toward the passenger side. For example, the projected portion Rwf of this semi-transparent mirror can be formed as a semi-transparent film along the curved shape of the windshield (front windshield Wf) and adhered to the interior wall of the windshield using an adhesive. Alternatively, the projected portion Rwf of this semi-transparent mirror can also be formed as a semi-transparent film along the curved shape of the windshield (front windshield Wf) and sealed together with an interlayer film within the laminated glass windshield. Alternatively, the projected portion Rwf of this semi-transparent mirror can also be a semi-transparent coating applied to the interior wall of the windshield (front windshield Wf) by coating or the like. In addition, the projected part Rwf can also be a combination device that covers the windshield Wf from the inside of the vehicle.

[0035] The vehicle display device 1 includes a control unit 60 that controls the operation of the display unit 10 and the drive unit 50. Figure 1 The control unit 60, for example, controls the display information (display light) of the display unit 10. Additionally, the control unit 60 controls the output of the motor 51 to rotate the second concave mirror 40.

[0036] The vehicle display device 1 includes a housing 70 and an inner housing 80 disposed within the housing 70. Figure 2 and Figure 3 In this vehicle display device 1, the housing is composed of an outer shell 70 and an inner shell 80.

[0037] The outer casing 70 not only houses the inner casing 80, but also at least a portion or all of the display unit 10, the plane mirror 20, the first concave mirror 30, the second concave mirror 40, and the driving unit 50. The outer casing 70 emits display light from the display unit 10's display 11 indoors, and the display light, after being reflected by the second concave mirror 40, is emitted outdoors towards the projection section Rwf. The outer casing 70 has an opening (hereinafter referred to as the "emission port") 70a for the display light reflected by the second concave mirror 40 to be emitted outdoors. Figure 2 and Figure 3 The inner housing 80 forms an optical path between the display 11 of the display unit 10 and the outlet 70a of the outer housing 70 within the outer housing 70.

[0038] The housing 70 includes: a lower housing 70A having an opening (hereinafter referred to as the "inlet") 70b that allows display light emitted from the display 11 of the outdoor display unit 10 to enter the interior, and holding the plane mirror 20 and the second concave mirror 40 inside the interior, and being fixed to the vehicle body; and a lower cover 70B that houses the display unit 10 outdoors in the lower housing 70A, and is fixed to the lower housing 70A. Figures 2 to 4 ).

[0039] The display unit 10 is positioned opposite the display 11 to the inlet 70b and facing the interior of the lower housing 70A, while being located outside the lower housing 70A. The display unit 10 is threadedly fixed to the lower housing 70A from the outside. The lower cover 70B houses the display unit 10 in a manner that covers the exterior of the lower housing 70A and is threadedly fixed to the lower housing 70A.

[0040] The lower housing 70A has an opening (hereinafter referred to as the "reception opening") 70c facing upwards from the vehicle. Figure 3 and Figure 4 In the lower housing 70A, the plane mirror 20, the second concave mirror 40, part or all of the drive unit 50, and the inner housing 80 are housed from its receiving opening 70c into the interior.

[0041] In the lower housing 70A, the interior plane mirror 20 is clamped between the lower housing 70A and the first inner housing 80A (described later). Additionally, in the lower housing 70A, the periphery of the first concave mirror 30 is mounted on the periphery of the receiving opening 70c, and the first concave mirror 30 is clamped between the lower housing 70A and the upper housing 70C (described later). Furthermore, in the lower housing 70A, the rotation shaft 53 on the side of the second concave mirror 40 is connected via a bearing member 54 (…). Figure 5 and Figure 6 The bearing component 54 is formed or configured to support the rotating shaft 53 for free rotation, and the bearing component 54 is fixed to the bearing fixing part 71 inside the lower housing 70A. Figure 4 Here, the bearing component 54 is threadedly fixed to the bearing mounting portion 71 in the inner cavity of the lower housing 70A. The drive unit 50 has this bearing component 54 for each rotating shaft 53.

[0042] A body fixing part 72 for the vehicle body is provided on the outer wall surface of the lower housing 70A. Figures 2 to 4 The lower housing 70A is threaded to the vehicle body at the vehicle body fixing part 72.

[0043] The outer casing 70 further includes: an upper casing 70C having an outlet 70a and fixed to a lower casing 70A, and holding a first concave mirror 30 between the upper casing 70C and the lower casing 70A; and a transparent cover 70D that closes the outlet 70a. Figure 2 and Figure 3 ).

[0044] The upper housing 70C covers the lower housing 70A from the outside, housing the plane mirror 20, the second concave mirror 40, part or all of the drive unit 50, and the inner housing 80, and closes the receiving opening 70c by clamping the periphery of the first concave mirror 30 placed on the periphery of the receiving opening 70c of the lower housing 70A. The upper housing 70C is threadedly fixed to the lower housing 70A with the receiving opening 70c closed. An outlet 70a is provided above the vehicle in the upper housing 70C. A cover 70D is assembled to the upper housing 70C to close the outlet 70a.

[0045] The vehicle display device 1 is housed in the dashboard Pi inside the vehicle interior, with the cover 70D exposed. Figure 1 In this vehicle display device 1, the display light reflected by the second concave mirror 40 is emitted from the cover 70D to the outside of the outer casing 70 and projected onto the projection portion Rwf located in front of it, thereby causing the display light to be reflected toward the eye point EP or the eye movement range EB by the projection portion Rwf.

[0046] The inner housing 80 is fixed to the lower housing 70A within the interior of the lower housing 70A. Additionally, the inner housing 80 holds a plane mirror 20 between itself and the lower housing 70A. The inner housing 80 includes: a first inner housing 80A, which is fixed to the lower housing 70A within the interior of the lower housing 70A and holds a plane mirror 20 within the lower housing 70A between itself and the lower housing 70A; and a second inner housing 80B, which is fixed to the lower housing 70A within the interior of the lower housing 70A. Figure 3 as well as Figure 5 ).

[0047] Within the first inner housing 80A, a first internal space 81a is formed that constitutes the optical path between the display 11 and the plane mirror 20, and the optical path between the plane mirror 20 and the first concave mirror 30. Figure 5 , Figure 7 and Figure 8 Furthermore, a first opening 81b, a second opening 81c, and a third opening 81d are formed in the first inner housing 80A. Figure 5 , Figure 7 as well as Figure 8 ).

[0048] The first opening 81b is positioned opposite the display 11 and allows the display light emitted from the display 11 to enter the first internal space 81a. The first opening 81b is positioned opposite the inlet 70b of the lower housing 70A within the interior of the lower housing 70A.

[0049] The second opening 81c has an opening periphery that holds the periphery of the plane mirror 20 between itself and the lower housing 70A, thus exposing the plane mirror 20 in the first internal space 81a. Therefore, the second opening 81c allows display light from the display 11 that enters the first internal space 81a to be incident on the plane mirror 20, and allows the display light reflected by the plane mirror 20 to be emitted toward the first concave mirror 30.

[0050] The third opening 81d allows the display light reflected by the plane mirror 20 to be directed toward the first concave mirror 30 and emitted to the outside of the first internal space 81a.

[0051] The first inner housing 80A is threadedly fixed to the lower housing 70A in a state where the plane mirror 20 is clamped between the inner housing 80A and the lower housing 70A.

[0052] A second internal space 82a is formed in the second inner housing 80B. This second internal space 82a constitutes the optical path between the plane mirror 20 and the first concave mirror 30, the optical path between the first concave mirror 30 and the second concave mirror 40, and the optical path between the second concave mirror 40 and the projected portion Rwf. Figure 5 and Figure 9 The second inner housing 80B has a first opening 82b, a second opening 82c, a third opening 82d, and a fourth opening 82e. Figure 5 and Figure 9 ).

[0053] The first opening 82b is positioned opposite the third opening 81d of the first inner housing 80A. Thus, the first opening 82b allows the display light reflected by the plane mirror 20 to the first concave mirror 30 to enter the second internal space 82a.

[0054] The second opening 82c is positioned opposite the first concave mirror 30. Thus, the second opening 82c allows the display light from the plane mirror 20 that enters the second internal space 82a to be incident on the first concave mirror 30, and allows the display light reflected by the first concave mirror 30 to be emitted toward the second concave mirror 40.

[0055] The third opening 82d is positioned opposite the second concave mirror 40. Thus, the third opening 82d allows the display light reflected by the first concave mirror 30 to enter the second concave mirror 40, and allows the display light reflected by the second concave mirror 40 to exit towards the projection section Rwf.

[0056] The fourth opening 82e is positioned opposite the outlet 70a of the upper housing 70C and the cover 70D, and the display light reflected by the second concave mirror 40 is emitted toward the outside of the second internal space 82a by the projection part Rwf.

[0057] The second inner housing 80B is threadedly fixed to the lower housing 70A.

[0058] As described above, since the vehicle display device 1 of this embodiment uses three reflective components (plane mirror 20, first concave mirror 30, and second concave mirror 40), it can achieve high magnification of virtual image display and extend the viewing distance by extending the optical path length in the housing (outer housing 70 and inner housing 80). On the other hand, since the optical path length of this vehicle display device 1 is relatively long, it is difficult to ensure the display quality of the virtual image.

[0059] However, in the vehicle display device 1 of this embodiment, since two of the three reflecting components (plane mirror 20, first concave mirror 30, and second concave mirror 40) are aspherical mirrors (freeform mirrors), the display quality of the virtual image can be ensured.

[0060] Furthermore, in the vehicle display device 1 of this embodiment, the plane mirror 20 is sandwiched between the lower housing 70A of the outer shell 70 and the first inner housing 80A of the inner housing 80, the first concave mirror 30 is sandwiched between the lower housing 70A and the upper housing 70C of the outer shell 70, and the second concave mirror 40 is held in the lower housing 70A via the bearing member 54. That is, in the vehicle display device 1 of this embodiment, all three reflecting components (plane mirror 20, first concave mirror 30, and second concave mirror 40) are held by a single lower housing 70A disposed between them. As a result, the vehicle display device 1 can minimize the number of design tolerances related to the relative positional relationship of the three reflecting components (plane mirror 20, first concave mirror 30, and second concave mirror 40), and can minimize the mutual deviations caused by cumulative tolerances. Therefore, the vehicle display device 1 of this embodiment can improve the positional accuracy between the plane mirror 20 and the first concave mirror 30, and can also improve the positional accuracy between the first concave mirror 30 and the second concave mirror 40, and can form a high-precision optical path in the housing (outer housing 70, inner housing 80), thus ensuring the display quality of the virtual image.

[0061] Furthermore, since the lower housing 70A of the vehicle display device 1 in this embodiment is fixed to the vehicle body, the positional accuracy from the fixing point to each reflecting component (plane mirror 20, first concave mirror 30, second concave mirror 40) can be improved. In addition, the positional accuracy between the second concave mirror 40 and the projected portion Rwf can also be improved. Therefore, the vehicle display device 1 of this embodiment can not only improve the accuracy of the light path reaching the housing (outer housing 70, inner housing 80), but also improve the accuracy of the light path reaching the outside of the housing, thus ensuring the display quality of the virtual image.

[0062] Thus, the vehicle display device 1 of this embodiment can extend the viewing distance while ensuring the display quality of the virtual image.

[0063] Furthermore, in this embodiment, the vehicle display device 1 employs a two-part structure for the inner housing 80 that forms the optical path, consisting of a first inner housing 80A and a second inner housing 80B. Therefore, compared to an inner housing composed of a single component, the vehicle display device 1 of this embodiment offers greater design freedom related to the shape of the optical path, improving formability. Moreover, compared to an inner housing composed of a single component, the smaller first inner housing 80A and second inner housing 80B can be assembled separately in this vehicle display device 1, thus reducing the impact of strong interference on the three reflecting components (plane mirror 20, first concave mirror 30, and second concave mirror 40) during assembly. Therefore, this vehicle display device 1 improves assembly workability.

[0064] Explanation of reference numerals in the attached figures

[0065] 1. Vehicle display device

[0066] 10 display units

[0067] 11 Monitors

[0068] 20 plane mirrors

[0069] 30 First concave mirror

[0070] 40 Second concave mirror

[0071] 70 Outer shell

[0072] 70A lower case

[0073] 70B bottom cover

[0074] 70C Upper Housing

[0075] 70a Exit Port

[0076] 70b Inlet

[0077] 80 Inner shell

[0078] 80A First Inner Shell

[0079] 80B Second Inner Shell

[0080] 81a First Interior Space

[0081] 81b First Opening

[0082] 81c Second Opening

[0083] 81d Third Opening

[0084] 82a Second Interior Space

[0085] 82b First Opening

[0086] 82c Second Opening

[0087] 82d Third Opening

[0088] 82e Fourth opening

[0089] Rwf is projected by the part

Claims

1. A display device for a vehicle, characterized in that, have: outer shell; An inner housing disposed within the outer housing; The display unit emits display information that will be visually recognized as a virtual image by passengers inside the vehicle as display light into the outer casing; A plane mirror that reflects the display light emitted from the display of the display unit within the housing. A first concave mirror, which causes the display light reflected by the plane mirror to be reflected within the housing; as well as A second concave mirror reflects the display light, which has been reflected by the first concave mirror, within the housing, causing the display light to be projected from the exit port of the housing onto the projection area inside the vehicle. The outer casing includes: a lower housing having an inlet, through which display light emitted from the display of the display unit fixed outdoors enters the interior, and the lower housing holds the plane mirror and the second concave mirror indoors, and the lower housing is fixed to the vehicle body; and a lower cover housing the display unit outdoors of the lower housing and is fixed to the lower housing. The upper housing has the outlet and is fixed to the lower housing, and the first concave mirror is held between the upper housing and the lower housing. The inner housing is fixed to the lower housing inside the lower housing, and the plane mirror is clamped between the inner housing and the lower housing.

2. The vehicle display device according to claim 1, characterized in that, The inner housing forms the optical path between the display and the emission port.

3. The vehicle display device according to claim 1 or 2, characterized in that, The inner housing includes: a first inner housing fixed to the lower housing within the interior of the lower housing, and holding the plane mirror inside the lower housing between the first inner housing and the lower housing; and a second inner housing fixed to the lower housing within the interior of the lower housing. The first inner housing comprises: a first internal space, which forms the light path between the display and the plane mirror and the light path between the plane mirror and the first concave mirror; a first opening, which is disposed opposite to the display and allows display light emitted from the display to enter the first internal space; a second opening, which has a peripheral portion that clamps the peripheral portion of the plane mirror between the peripheral portion of the opening and the lower housing, and allows the display light from the display that has entered the first internal space to enter the plane mirror and allows the display light reflected by the plane mirror to exit toward the first concave mirror; and a third opening, which allows the display light reflected by the plane mirror to exit toward the first concave mirror and outward of the first internal space. The second inner housing has: a second internal space, which forms the light path between the plane mirror and the first concave mirror, the light path between the first concave mirror and the second concave mirror, and the light path between the second concave mirror and the projected portion; a first opening, which is disposed opposite to the third opening of the first inner housing, and allows the display light reflected from the plane mirror to the first concave mirror to enter the second internal space; and a second opening, which is disposed opposite to the first concave mirror, and allows the light from the plane mirror to enter the second internal space. The display light of the mirror is incident on the first concave mirror, and the display light reflected by the first concave mirror is emitted toward the second concave mirror; a third opening is disposed opposite to the second concave mirror, and the display light reflected by the first concave mirror is incident on the second concave mirror, and the display light reflected by the second concave mirror is emitted toward the projected portion; and a fourth opening is disposed opposite to the exit port, and the display light reflected by the second concave mirror is emitted toward the projected portion and toward the outside of the second internal space.

Images