JP2018045170A - On-vehicle display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain improvement in visibility due to an enlargement or a distortion correction about images to be projected to a combiner as suppressing increase in the number of components, and attain miniaturization of a device.SOLUTION: An on-vehicle display device according to the present invention comprises: a display unit that implements an image display; a combiner that has a reflection surface, in which a display image by the display unit is projected on the reflection surface; a transmission type correction optical element that is located between the display unit and the combiner to make a distortion correction about the image to be projected to the combiner; and a fixed part that has the display unit, the combiner and the correction optical element attached, and is fixed to a vehicle via a fixing tool. The correction optical element has an enlargement function of the image.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an in-vehicle display device in which a display image by a display unit is projected on a reflecting surface of a combiner and visually recognized by a user such as a driver, and in particular, a fixed part to which a combiner and a display unit are attached is provided. The present invention relates to a vehicle-mounted display device in which the fixed portion is fixed to a vehicle via a fixture.

For example, there is an in-vehicle display device known as a head-up display (hereinafter referred to as “HUD”).
The HUD displays, for example, vehicle information acquired from a vehicle-side control system such as an ECU (engine control unit) or an image of a driving / running navigation system. The display is performed by providing a display unit that displays an image, such as a liquid crystal display or a fluorescent display tube, and projecting a display image by the display unit onto a combiner. As the combiner, a type that is integrally attached to the front window and a type that is provided separately from the front window are known.

  In HUD, in order to ensure the visibility of the image (virtual image) visually recognized by the user, the image is enlarged. For example, the reflection surface of the combiner is curved, and the image is enlarged by the principle of a so-called concave mirror. At this time, the enlargement ratio can be effectively earned by increasing the optical path length from the display unit to the combiner.

  However, simply increasing the separation distance from the display unit to the combiner to increase the optical path length will unnecessarily increase the device size. In particular, the HUD of the type in which the combiner is provided separately from the front window should be avoided in size because the device is disposed in a limited space in the vehicle interior such as on the dashboard.

  Therefore, for example, as in the HUD disclosed in Patent Document 1 below, a mirror is inserted in the optical path from the display unit to the combiner to fold the optical path, thereby reducing the size of the apparatus while increasing the optical path length. It has been broken. Specifically, the size is reduced in the depth direction of the apparatus, that is, in the direction perpendicular to the display surface of the display unit.

  However, the method using the mirror causes an increase in size in the vertical direction of the apparatus, that is, in the vertical direction of the visually recognized image. In Patent Document 1, since it is assumed that the optical path is turned back by a mirror, the display unit and the mirror are housed in a housing provided below the combiner (see FIG. 3 in Patent Document 1). Unless the optical path folding by the mirror is assumed, the display unit can be arranged at a position facing the combiner in the apparatus depth direction. As can be understood from this point, the method using a mirror causes an increase in the size of the apparatus in the vertical direction.

  Moreover, in HUD, since an image is projected on the curved combiner (or windshield), distortion correction of an image is performed and the visibility of an image is improved. The distortion correction is generally performed, for example, by inserting an optical element for correction in the optical path from the display unit to the combiner (see, for example, Patent Documents 2 and 3 below).

JP-A-11-72742 JP 2002-202475 A JP 2005-202145 A

  It is an object of the present invention to reduce the size of an apparatus while improving the visibility of an image projected on a combiner by enlarging or correcting distortion while suppressing an increase in the number of components.

  An in-vehicle display device according to the present invention includes a display unit that performs image display, a reflective surface, a combiner that projects a display image by the display unit onto the reflective surface, and a space between the display unit and the combiner. A transmissive correction optical element that performs distortion correction on an image that is positioned on and projected onto the combiner, the display unit, the combiner, and the correction optical element are attached and fixed to the vehicle via a fixture. And the correction optical element has a function of enlarging the image.

Since the correction optical element has an image enlargement function, it is possible to enlarge the image size without increasing the optical path length. That is, it is possible to omit the mirror for increasing the optical path length.
Further, since the correction optical element has an image enlargement function, it is not necessary to provide an optical element for image enlargement separately from the correction optical element.

  In the above-described in-vehicle display device, it is desirable that the correction optical element is configured as a lens having a free curved surface.

  As a result, various surface shapes can be arbitrarily laid out and distortion correction and enlargement of the image can be performed.

  In the above-described in-vehicle display device, the correction optical element has different portions on the free-form surface where the light reaching the viewpoint position from the display section via the combiner when the viewpoint position of the user is different. It is desirable to be configured so that different optical control according to the surface shape of each of the portions is performed.

  Thereby, it is possible to perform optical control in an appropriate mode according to the shift direction and the shift amount with respect to the distortion of the image generated in different modes depending on the shift direction and shift amount of the viewpoint position.

  In the above-described in-vehicle display device, it is desirable that the correction optical element has a free curved surface on both the surface facing the combiner and the surface facing the display unit.

  Thereby, it is possible to further increase the distortion correction effect and the degree of freedom in lens design.

  In the above-described in-vehicle display device, in the direction perpendicular to the display surface of the display unit, the separation distance between the combiner center that is the center of the combiner and the optical element center that is the center of the correction optical element is the optical element. It is desirable that the distance is longer than the distance between the center and the center of the display unit which is the center of the display unit.

  Under the constraint that the optical path length from the display unit to the combiner cannot be increased due to miniaturization, in order to increase the magnification of the image (virtual image) viewed through the combiner, the optical element center and the display unit center It is effective to shorten the distance and increase the distance between the optical element center and the combiner center.

  In the above-described in-vehicle display device, the separation distance between the center of the combiner and the center of the optical element is 10 to 12 times the separation distance between the center of the optical element and the center of the display unit in the vertical direction. It is desirable that

  If the clearance between the display unit and the correction optical element is too small, the display surface may be damaged when the correction optical element is attached in the assembly operation of the in-vehicle display device. In consideration of such prevention of damage and downsizing in the direction perpendicular to the display surface, it is effective to set the separation distance as described above.

  In the above-described in-vehicle display device, the combiner and the display unit are respectively attached to an end portion on the vehicle front side and an end portion on the vehicle rear side of the fixed portion in a state of being fixed to the vehicle. It is desirable.

  Thereby, the optical path length from the display unit to the combiner can be made as long as possible in the in-vehicle display device having a limited size.

  According to the vehicle-mounted display device of the present invention, it is possible to reduce the size of the device while increasing the visibility of the image projected on the combiner by enlarging or correcting distortion while suppressing an increase in the number of components.

1 is an external perspective view of a HUD unit as an embodiment according to the present invention. It is a 6th page figure of the HUD unit as an embodiment. It is explanatory drawing about the distortion correction effect | action by the correction | amendment optical element of embodiment. It is a figure for demonstrating the specific positional relationship of the combiner in the HUD unit as embodiment, a display part, and a correction | amendment optical element.

  Embodiments of the present invention will be described below.

<Structure of HUD unit>
1 and 2 are an external perspective view, a six-view diagram (a front view, a left-side view, a right-side view, and a rear view) of a HUD (Head Up Display) unit 1 that is an embodiment of a vehicle-mounted display device according to the present invention. Figure, plan view, bottom view).
The HUD unit 1 is an in-vehicle display device that is attached to a vehicle as a so-called after-part, and has portability before being attached to the vehicle.

  The HUD unit 1 includes a combiner 2 having a reflecting surface 2a, a base part 3 to which the combiner 2 is attached, and a housing part to which the display part 4 and the correction optical element 5 are arranged. 6 and a leg portion 7 and a fixing portion 8 that function as a fixture to the vehicle.

  The display unit 4 is a self-luminous display device and is attached to the housing unit 6. In this example, a VFD (Vacuum Fluorescent Display) is adopted as the display unit 4.

  The correction optical element 5 is a transmissive optical element having optical transparency, and is composed of, for example, a resin lens. The correction optical element 5 is positioned in the optical path from the display unit 4 to the combiner 2, and corrects distortion for an image projected from the display unit 4 to the combiner 2 (reflection surface 2 a) and visually recognized by a user such as a driver. Do. The correction optical element 5 is attached to the housing part 6 in a state where a part thereof is exposed to the outside of the housing part 6.

The base unit 3 is formed in a substantially rectangular parallelepiped shape. For example, a communication unit for performing wireless communication with an external electronic device such as a smartphone or a tablet terminal, a microcomputer for performing display control of the display unit 4, or the like. The mounted electronic substrate 20 is incorporated.
A power supply terminal 10 is provided on one side surface (see the left side view) of the base unit 3. For example, a USB (Universal Serial Bus) terminal is used as the power supply terminal 10. A power supply voltage can be input from a USB charger connected to a so-called cigarette lighter power source of a vehicle by using a power line and a ground line of the USB cable.

A leg 7 is attached below the base 3. A fixed portion 8 is attached to the lower end of the leg portion 7. By the fixing portion 8, the HUD unit 1 is attached and fixed to, for example, an arbitrary position (in the present example, on the dashboard) in the vehicle. For example, the HUD unit 1 can be secured by a method such as screwing using a screw hole of the fixing portion 8, adhesive fixing with a double-sided tape affixed to the bottom surface of the fixing portion 8, or suction fixing with a suction cup attached to the bottom surface side of the fixing portion 8. Is fixed.
A bearing pivot mechanism that can rotate in any direction is provided at both end portions of the leg portion 7, and the height of the base portion 3 is higher than the fixed portion 8 as shown by a broken line and a solid line in the left side view of FIG. The position can be adjusted steplessly.
The leg portion 7 may be detachable from the base portion 3, and the fixing portion 8 may be detachable from the leg portion 7.

For example, in a state of being fixed to the vehicle such as a dashboard, the base portion 3 has a rectangular parallelepiped shape in which the longitudinal direction of the traveling direction of the vehicle is the longitudinal direction.
In this state, the combiner 2 is attached to the end portion of the base portion 3 on the vehicle front side. Moreover, the housing part 6 is located in the edge part used as the vehicle rear side of the base part 3. As shown in FIG.

The display unit 4 has a display surface (not shown in FIGS. 1 and 2) directed toward the front side of the vehicle, the combiner 2 is curved in a direction that protrudes toward the front side of the vehicle, and a surface on the rear side of the vehicle serves as a reflection surface 2a. Is formed.
The front surface of the correction optical element 5 is exposed from the housing portion 6, and the display image by the display portion 4 is projected onto the reflection surface 2 a of the combiner 2.

In the HUD unit 1, data transmitted from the external electronic device is received by the communication unit in the base unit 3, and the microcomputer in the base unit 3 controls the operation of the display unit 4 based on the received data to perform various operations. Display information.
When the display unit 4 displays an image, the image light corresponding to the display image is reflected by the reflecting surface 2a of the combiner 2 and guided to the viewpoint position of the user such as the driver. Thereby, the virtual image according to the display image by the display part 4 is visually recognized by the user through the reflective surface 2a.

  In the combiner 2, the reflecting surface 2 a has a certain light transmissivity, so that it reflects the image light from the display unit 4 and does not disturb the field of view in front of the vehicle. That is, the user can visually recognize the display image of the display unit 4 as a virtual image by the image light reflected by the combiner 2 and can visually recognize the scenery of the vehicle outside through the combiner 2.

Here, in the HUD unit 1, a portion composed of the base portion 3 and the housing portion 6 is referred to as “fixed portion 9”. The fixed portion 9 is a portion to which the display portion 4, the combiner 2, and the correction optical element 5 are attached, and is fixed to the vehicle via a fixture (corresponding to the leg portion 7 and the fixing portion 8 in this example). In other words.
And in this example, the combiner 2 and the display part 4 are each attached to the different edge part of the to-be-fixed part 9. FIG. Specifically, the combiner 2 and the display unit 4 are respectively attached to an end portion on the vehicle front side and an end portion on the vehicle rear side of the fixed portion 9.
Thereby, the optical path length from the display unit 4 to the combiner 2 can be made as long as possible in the HUD unit 1 having a limited size. In other words, the entire HUD unit 1 can be reduced in size while ensuring a certain length of optical path length from the display unit 4 to the combiner 2.

<About correction optical element>
FIG. 3 is an explanatory diagram of the distortion correction action by the correction optical element 5. FIG. 3A shows the combiner 2, the display unit 4, the user's viewpoint (eye point) P when the HUD unit 1 is observed from the lower side. And the optical path of image light with reference to the viewpoint P. FIG. 3B shows the same positional relationship and the same optical path when the HUD unit 1 is observed from the left side (left side when facing the front of the vehicle).
As understood with reference to FIGS. 3A and 3B, the user's viewpoint P is located on the vehicle rear side with respect to the display unit 4.

The correction optical element 5 is configured as a lens having a free-form surface. Specifically, the correction optical element 5 of this example has free curved surfaces on both the surface facing the combiner 2 and the surface facing the display unit 4.
Then, the correction optical element 5 corrects image distortion caused by the user's viewpoint deviation by the surface shape of the free-form surface.

In FIGS. 3A and 3B, an ideal eye point based on the design is indicated as a viewpoint Pi, and an optical path based on the viewpoint Pi is indicated by a broken line.
In FIG. 3A, the optical path based on the viewpoint Pl shifted leftward from the viewpoint Pi is represented by a solid line, and in FIG. 3B, the optical path based on the viewpoint Pd shifted downward from the viewpoint Pi is represented by a solid line.
Moreover, in FIG. 3A and 3B, the display surface 4a in the display part 4 is shown typically.
In FIG. 3B, a broken line S shown in the approximate center of the correction optical element 5 represents a surface of the correction optical element 5 on the side facing the display unit 4.

3A and 3B, in the correction optical element 5 of this example, when the position of the viewpoint P of the user is different, the position of the viewpoint P is changed from the display unit 4 via the combiner 2. It can be seen that the reaching light is transmitted through different portions of the free-form surface, and different optical control is performed according to the surface shape of each portion.
Thereby, it is possible to perform optical control in an appropriate mode according to the shift direction and the shift amount with respect to the distortion of the image generated in different modes depending on the shift direction and shift amount of the viewpoint position. That is, the distortion of the image due to the viewpoint position shift is corrected.

The correction optical element 5 of this example has an enlargement function for an image visually recognized by the user via the combiner 2 in addition to the distortion correction function as described above. That is, it is a function of visually recognizing a larger image as an image (virtual image) projected on the combiner 2 and visually recognized by the user.
This enlargement function is also realized by the shape design of the lens surface of the correction optical element 5 (the surface facing the combiner 2 and the surface facing the display unit 4). That is, in this example, it is realized by the surface shape of a free-form surface.

Since the correction optical element 5 has an image enlargement function, the image size can be increased without increasing the optical path length, and a mirror for increasing the optical path length can be omitted.
Further, since the correction optical element 5 has an image enlargement function, it is not necessary to provide an optical element for image enlargement separately from the distortion correction element, and the number of components can be reduced.

  Here, in this example, a lens having a free-form surface is adopted as the correction optical element 5, but this makes it possible to arbitrarily lay out various surface shapes to correct and enlarge an image. Therefore, the distortion correction effect can be enhanced. In addition, the degree of freedom in lens design can be increased as compared with the case of performing correction using only a curved surface with a single curvature radius.

  In particular, in this example, the correction optical element 5 having free curved surfaces on both surfaces is used, but this can further enhance the distortion correction effect and the degree of freedom in lens design.

  FIG. 4 is a diagram for explaining a specific positional relationship among the combiner 2, the display unit 4, and the correction optical element 5 in the HUD unit 1. 4 shows the positional relationship among the combiner 2, the display unit 4, and the correction optical element 5 when the HUD unit 1 is observed from the left side.

Here, as the three-dimensional space, the direction perpendicular to the display surface 4a is the Z-axis direction, the horizontal direction of the display image by the display unit 4 (the direction substantially parallel to the vehicle left-right direction) is the X-axis direction, and the vertical direction of the display image ( A three-dimensional space having a Y direction in a direction substantially parallel to the vehicle vertical direction is defined.
In this three-dimensional space, the coordinates (X, Y, Z) of the combiner center Cc, which is the center of the combiner 2, are set to (0, 0, 0). In addition, the lower end part of the combiner 2 enclosed with the broken line in a figure is an attachment part to the base part 3, and the combiner center Cc in this case is taken as the center position of the part except this attachment part. The unit of the numerical value of the coordinates (X, Y, Z) is mm (millimeter).

The coordinates of the viewpoint position Pi in this example are set to (0, 250, 750).
In the HUD unit 1 of this example, the coordinates of the optical element center Co that is the center of the correction optical element 5 are (0, −40, −110), and the coordinates of the display unit center Cd that is the center of the display unit 4 are (0, -50, -120).

Here, in the Z-axis direction, the separation distance between the optical element center Co and the display unit center Cd is “distance D1”, and the separation distance between the optical element center Co and the combiner center Cc is “distance D2.”
In order to increase the enlargement ratio of an image (virtual image) visually recognized through the combiner 2 under the restriction that the optical path length from the display unit 4 to the combiner 2 cannot be increased due to downsizing, the distance D1 is shortened. Thus, it is effective to increase the distance D2 (see the optical path in FIG. 3B above). If the distance D2 is shortened, it is necessary to increase the power of the correction optical element 5 to obtain a desired image enlargement ratio, and the design of the correction optical element 5 becomes difficult. Further, the size of the housing part 6 that covers the display part 4 and the correction optical element 5 is also increased.

For this reason, it is desirable that at least “distance D2”> “distance D1” is satisfied as the positional relationship in the Z-axis direction of the combiner 2, the display unit 4, and the correction optical element 5.
As a result, the size of the HUD unit 1 in the Z-axis direction can be reduced when obtaining a predetermined image enlargement ratio. In addition, the housing 6 can be reduced in size.

When the HUD unit 1 is assembled, if the clearance between the display unit 4 and the correction optical element 5 in the Z-axis direction is too small, the display surface may be damaged when the correction optical element 5 is attached.
In consideration of both the prevention of such damage and the reduction in size in the Z-axis direction, the distance D2 is desirably 10 to 12 times the distance D1. Considering a sufficient margin for damage, it is more desirable to set “D2 = D1 × 11” as in the positional relationship illustrated in FIG.

  Note that, in the arrangement positional relationship as described above, the allowable range of viewpoint deviation due to the provision of the correction optical element 5 of the present example, that is, the range of viewpoint deviation in which image distortion is hardly visually recognized, is based on the viewpoint Pi. Was approximately ± 55 mm (approximately ± 4 deg), and the Y-axis direction was approximately ± 12 mm (approximately ± 1 deg).

<Summary and modification>
As described above, the vehicle-mounted display device (HUD unit 1) according to the embodiment includes a display unit (display unit 4) that performs image display and a reflective surface (reflective surface 2a). A combiner (combiner 2) projected on the reflecting surface, a transmission type correction optical element (correction optical element 5) for correcting distortion of an image positioned between the display unit and the combiner and projected onto the combiner; A fixed portion (fixed portion 9) that is fixed to the vehicle via a fixture. The correction optical element has an image enlargement function.

Since the correction optical element has an image enlargement function, it is possible to enlarge the image size without increasing the optical path length. That is, it is possible to omit the mirror for increasing the optical path length.
Further, since the correction optical element has an image enlargement function, it is not necessary to provide an optical element for image enlargement separately from the correction optical element.
Therefore, it is possible to reduce the size of the apparatus while improving the visibility of the image projected on the combiner by enlarging or correcting distortion while suppressing an increase in the number of parts.

  In the in-vehicle display device according to the embodiment, the correction optical element is configured as a lens having a free-form surface.

As a result, various surface shapes can be arbitrarily laid out and distortion correction and enlargement of the image can be performed.
Therefore, the distortion correction effect can be enhanced. In addition, the degree of freedom in lens design can be increased as compared with the case where correction is performed using only a curved surface with a single curvature radius.

  Furthermore, in the in-vehicle display device according to the embodiment, when the viewpoint position of the user is different, the correction optical element is configured so that light reaching the viewpoint position from the display unit via the combiner has different portions on the free-form surface. It is configured to be transmitted and subjected to different optical control depending on the surface shape of each part.

Thereby, it is possible to perform optical control in an appropriate mode according to the shift direction and the shift amount with respect to the distortion of the image generated in different modes depending on the shift direction and shift amount of the viewpoint position.
Therefore, it is possible to correct image distortion caused by the viewpoint position shift.

  Furthermore, in the in-vehicle display device according to the embodiment, the correction optical element has a free curved surface on both the surface facing the combiner and the surface facing the display unit.

  Thereby, the distortion correction effect and the degree of freedom in lens design can be further increased.

  In the in-vehicle display device according to the embodiment, the combiner center (Cc) that is the center of the combiner and the optical element center (Co) that is the center of the correction optical element in the direction perpendicular to the display surface of the display unit. The separation distance (distance D2) is longer than the separation distance (distance D1) between the optical element center and the display portion center (Cd) that is the center of the display portion.

In order to increase the magnification rate of the image viewed through the combiner under the restriction that the optical path length from the display unit to the combiner cannot be increased due to downsizing, the distance D1 is shortened and the distance D2 is lengthened. Is effective.
Accordingly, as described above, by setting the separation distance so that “distance D2”> “distance D1”, the size can be reduced in the vertical direction (Z-axis direction) for obtaining a predetermined image enlargement ratio. Can be achieved.

  Further, in the in-vehicle display device of the embodiment, in the vertical direction, the separation distance between the combiner center and the optical element center is 10 to 12 times the separation distance between the optical element center and the display unit center. ing.

If the clearance between the display unit and the correction optical element is too small, the display surface may be damaged when the correction optical element is attached in the assembly operation of the in-vehicle display device.
By setting the separation distance as described above, it is possible to reduce the size of the apparatus while preventing damage to the display surface during assembly work.

  Furthermore, in the in-vehicle display device of the embodiment, the combiner and the display unit are respectively attached to the end portion on the vehicle front side and the end portion on the vehicle rear side of the fixed portion in a state of being fixed to the vehicle. ing.

Thereby, the optical path length from the display unit to the combiner can be made as long as possible in the in-vehicle display device having a limited size.
Accordingly, it is possible to facilitate the enlargement of the image while reducing the size of the in-vehicle display device.

In addition, as a vehicle-mounted display apparatus of this invention, it is not limited to the structure of the HUD unit 1 of embodiment.
For example, although the HUD of the type attached on the dashboard is illustrated, the in-vehicle display device of the present invention adopts a configuration corresponding to attachment to a front window, a side window, a vehicle ceiling, etc. It is also possible to adopt a configuration corresponding to the mounting form.

Moreover, although the example which employ | adopts VFD as a display part was given, the backlight type liquid crystal display panel or an organic EL (Electroluminescence) display can also be employ | adopted.
Moreover, the structure which makes a combiner detachable by the user can also be taken. Thereby, it can respond to the exchange according to breakage, the exchange to the combiner of a different size, etc. In addition, it is possible to adopt a usage method such as attaching a combiner only at the time of use, and it is possible to prevent the deterioration of the combiner due to exposure to sunlight even when not in use on the dashboard or the like.

  DESCRIPTION OF SYMBOLS 1 ... HUD unit, 2 ... Combiner, 2a ... Reflecting surface, 3 ... Base part, 4 ... Display part, 4a ... Display surface, 5 ... Correction optical element, 6 ... Housing part, 7 ... Leg part, 8 ... Fixed part , 9 ... Fixed part, 10 ... Power supply terminal, 20 ... Electronic board

Claims (7)

A display unit for displaying images;
A combiner having a reflective surface, and a display image by the display unit projected onto the reflective surface;
A transmissive correction optical element that performs distortion correction on an image that is positioned between the display unit and the combiner and projected onto the combiner;
The display unit, the combiner, and the correction optical element are attached, and a fixed portion fixed to the vehicle via a fixture,
In-vehicle display device in which the correction optical element has a function of enlarging the image The in-vehicle display device according to claim 1, wherein the correction optical element is configured as a lens having a free-form surface. When the viewpoint position of the user is different, the correction optical element transmits light that reaches the viewpoint position from the display unit via the combiner through different parts of the free-form surface, and The in-vehicle display device according to claim 1, wherein different optical controls are performed according to the surface shape of the vehicle. The in-vehicle display device according to claim 2, wherein the correction optical element has free curved surfaces on both a surface facing the combiner and a surface facing the display unit. In the direction perpendicular to the display surface of the display unit, the distance between the combiner center that is the center of the combiner and the optical element center that is the center of the correction optical element is the center of the optical element and the center of the display unit. The in-vehicle display device according to any one of claims 1 to 4, wherein the in-vehicle display device is longer than a distance from the center of the display unit. The in-vehicle device according to claim 5, wherein a separation distance between the center of the combiner and the center of the optical element in the vertical direction is 10 to 12 times a separation distance between the center of the optical element and the center of the display unit. Display device. The said combiner and the said display part are each attached to the edge part used as the vehicle front side of the said to-be-fixed part in the state fixed to the said vehicle, and the edge part used as the vehicle rear side. The in-vehicle display device according to any one of the above.

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