JP6816928B2 - Vehicle display device - Google Patents

Description

The present invention relates to a vehicle display device, and more particularly to an electronic side mirror display device.

As a technology to replace the conventional optical side mirror, an electronic side mirror has been developed in which the rear side of the vehicle is imaged by a camera and the captured image data is displayed on a display device such as a liquid crystal display. Unlike conventional optical side mirrors, electronic side mirrors do not necessarily have to be installed outside the vehicle, and display devices can be installed near the driver's door or on some of the meters in front of the driver. It is also possible to install it. As a result, the driver can visually recognize the rear side of the vehicle through the captured image displayed on the display device with a small amount of movement of the line of sight. In addition, some electronic side mirrors project an image captured by a display device using an optical mirror.

However, there is a slight difference between the appearance of the conventional optical side mirror and the appearance of the image captured by the electronic side mirror or the projected image thereof. In view of these points, the vehicle display device of Patent Document 1 considers the movement of the viewpoint of the driver while driving, reduces the burden on the driver, and reduces the discomfort with the optical side mirror. Therefore, a configuration is disclosed in which a concave mirror or the like is used to extend the distance from the driver's viewpoint to the imaged reflected image. Further, Patent Document 2 discloses a vehicle display device provided with a mirror for displaying an image displayed on a display unit, which changes a visible range that the driver can see according to the driver's visible position. ing.

Japanese Unexamined Patent Publication No. 2009-120080 Japanese Unexamined Patent Publication No. 2016-040140

In the conventional electronic side mirror, the display device 300 is installed on the driver's door panel as shown in FIG. 6 (A), and the left and right of the instruments panel in front of the driver's seat are installed as shown in FIG. 6 (B). Display devices 300L and 300R are installed in. As shown in FIG. 6C, images of the rear side of the own vehicle M are displayed on the display devices 300, 300L, and 300R.

However, such an electronic side mirror has the following problems. First, the images captured by the cameras displayed on the display displays 300, 300L, and 300R lack a sense of depth, and it is difficult to grasp the sense of distance from an object such as a rear vehicle or a side vehicle. Secondly, since the display is arranged in the vehicle, the sense of width of the own vehicle and the sense of spatial distance between the own vehicle and the object are uncomfortable.

The present invention solves such a conventional problem, and an object of the present invention is to provide a display device for a vehicle in which a sense of depth, a sense of width of a vehicle, and a sense of spatial distance between the own vehicle and an object are improved. And.

The vehicle display device according to the present invention has an imaging means that images the surroundings of the vehicle, a display means that receives imaging data from the imaging means and displays an image of the surroundings of the vehicle, and an image displayed on the display means. It has a concave mirror to be projected and a plane mirror that reflects the image projected by the concave mirror toward the vehicle interior space side.

Preferably, the plane mirror reflects the image projected by the concave mirror toward the driver's seat side in the vehicle. Preferably, the plan mirror creates a virtual image of the image projected by the concave mirror on the outside of the vehicle. Preferably, the plane mirror creates a virtual image of the image projected by the concave mirror at a position where the optical side mirror can be installed. Preferably, the imaging means includes a plurality of imaging cameras that image the rear side of the vehicle, and the display means includes a plurality of display panels that display images captured by the plurality of imaging cameras. Preferably, the plurality of display panels are arranged within the dashboard of the vehicle. Preferably, the concave mirror and the planar mirror are adjustable in position or angle.

According to the present invention, the image displayed on the display means is projected by the concave mirror to give a sense of depth to the display image of the display means, and a virtual image of the image projected by the concave mirror by the plane mirror is generated outside the vehicle. , The captured image can be made natural with the same depth feeling, vehicle width feeling, and spatial distance feeling as the conventional optical side mirror. As a result, the cognitive load of the driver is reduced.

It is a figure which shows the whole structure of the display device for a vehicle which concerns on embodiment of this invention. It is a top view which shows the mounting example of the image pickup camera shown in FIG. It is a figure which shows the example of imaging by the left and right side cameras. FIG. 4A is a top view showing an example of mounting a display panel according to an embodiment of the present invention, and FIG. 4B is a top view illustrating a mounting position of a concave mirror and a plane mirror, which are optical members of the present embodiment. It is a figure. It is a figure which explains the optical conversion by the concave mirror and the plane mirror in the display panel by the Example of this invention. It is a figure explaining the problem of the conventional electronic side mirror.

Next, an embodiment of the present invention will be described. The vehicle display device according to the present embodiment includes an imaging camera that images the surroundings of the vehicle, particularly the rear side of the vehicle, and a display device that displays data captured by the imaging camera, and is a so-called electronic side mirror. To configure. In a preferred embodiment, the vehicle display device further includes at least a concave mirror and a plane mirror as optical components for optically converting the display image of the display device in order to give the image displayed by the display device a sense of depth and width. .. The concave and planar mirrors are preferably adjustable in position and angle to produce the optimum image for the driver or user. By reflecting the display image of the display device with a concave mirror, the image is given a sense of depth by the concave mirror effect, and by reflecting the image reflected by the concave mirror toward the space inside the vehicle with a plane mirror, the image projected on the concave mirror is displayed. A virtual image is generated outside the car. By setting the position of the virtual image to the position where the conventional side mirror exists, the captured image can be viewed with the same natural feeling as the optical side mirror.

Next, the details of the vehicle display device according to the embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an overall configuration of a vehicle display device according to this embodiment. The vehicle display device 10 of the present embodiment is an image processing device that receives one or more imaging cameras 20A to 20D for imaging the periphery of the vehicle and imaging data from the imaging cameras and performs image processing of the imaging data. 30 includes a display device 40 that displays image data processed by the image processing device 30, and an optical member 50 that incidents an image displayed by the display device 40 and optically converts the image. Although four imaging cameras 20A to 20D are illustrated here, the electronic side mirrors include at least a left side camera 20C that images the rear side of the left side of the vehicle and a right side that images the rear side of the right side of the vehicle. It should be noted that it is sufficient to have a square camera 20D. The front camera 20A and the rear camera 20D can be used to detect obstacles and the like existing in front of and behind the vehicle and avoid collisions with them, and are not essential for the configuration of the electronic side mirrors.

FIG. 2 is a plan view showing an installation example of an imaging camera. The front camera 20A and the rear camera 20B are attached to the front and rear of the vehicle, respectively, and image the front and rear of the vehicle. The left-side camera 20C and the right-side camera 20D are mounted at positions where optical side mirrors will be mounted, from which the rear side of the vehicle is imaged at a viewing angle θ. It is desirable that the imaging directions (optical axes) of the left-side camera 20C and the right-side camera 20D can be arbitrarily adjusted. This makes it possible to correspond the viewing angle to a different line-of-sight position or posture for each passenger. As shown in FIG. 3, the image pickup cameras 20C and 20D take an image of another vehicle A traveling behind the own vehicle M and another vehicle B traveling sideways, for example.

The data captured by the image pickup cameras 20A to 20D is provided to the image processing device 30. The image processing device 30 performs processing (for example, trimming, adjustment of brightness and color, etc.) necessary for the imaged data in order to enable the imaged data to be displayed on the display device 40. The image processing device 30 outputs the processed image data to the display device 40, and the display device 40 displays the received image data.

Although one display device 40 is shown in FIG. 1, in reality, the display device 40 may include one or more display units. For example, in the case of a display device for an electronic side mirror, the display device 40 displays a left display panel for displaying an image captured by the left side camera 20C and an image captured by the right side camera 20D. Includes a right display panel for These display panels are composed of, for example, a liquid crystal panel or an organic EL panel. Hereinafter, the left side display panel and the right side display panel for the electronic side mirror are collectively referred to as a display panel 40A. On the display panel 40A, an image of the rear side of the vehicle as shown in FIG. 6C is displayed.

FIG. 4A is a top view showing a mounting position of the display panel. As shown in the figure, the display panel 40A is arranged, for example, substantially horizontally on the dashboard 60 in the vehicle, particularly below the A pillar, that is, the display surface of the display panel is opposite to the contact surface with the dashboard. It is arranged so that it faces the ceiling on the side. However, the display panel 40A may be mounted at a position other than this, for example, it may be arranged on the door panel as shown in FIG. 6 (A) or around the meter as shown in FIG. 6 (B). It does not prevent it from being placed.

The vehicle display device 10 of this embodiment further includes an optical member 50 for optically converting an image displayed on the display panel 40A. Preferably, the optical member 50 incidents the display image of the display panel 40A and displays the concave mirror 52 positioned so as to reflect the display image in a certain direction and the image reflected by the concave mirror 52 on the driver U side of the vehicle interior space, for example. Includes a plane mirror 54 that reflects toward.

FIG. 4B is a top view showing the positional relationship between the display panel 40A, the concave mirror 52, and the planar mirror 54. The concave mirror 52 is arranged at a position where the image displayed on the display panel 40A can be projected, for example, in the vicinity of the display panel 40A. Further, preferably, the concave mirror 52 is attached so that the angle of its optical axis can be adjusted. As the adjusting means, for example, a known means such as a ball joint can be used. If the optical axis of the concave mirror 52 is slightly tilted toward the display surface of the display panel 40A, the image by the concave mirror 52 is reflected slightly downward and the optical axis is slightly tilted away from the display surface of the display panel 40A. If so, the image by the concave mirror 52 is reflected somewhat upward, and if the optical axis of the concave mirror 52 is parallel to the display surface, the image by the concave mirror 52 is reflected in the horizontal direction. The concave mirror 52 has an elliptical or spherical reflecting surface, and the concave mirror effect projects an image displayed on the display panel 40A with a sense of depth. The curvature of the concave mirror 52 is arbitrary, but if the curvature is large, the concave mirror effect is large, but on the other hand, the distortion of the image is also large.

The plane mirror 54 is arranged in the optical axis direction of the concave mirror 52 so that the image of the concave mirror 52 can be reflected. Preferably, the plane mirror 54 is arranged at a position and angle such that a virtual image X of the image projected on the concave mirror 52 is generated outside the vehicle. More preferably, the position and angle are adjusted so that the virtual image X of the concave mirror 52 is generated near the position where the conventional optical side mirror is installed. It is desirable that the angle of the planar mirror 54 can also be adjusted by a known adjusting means such as a ball joint. As shown in FIG. 4B, the image projected on the concave mirror 52 and its virtual image X are line-symmetric with respect to the plane mirror 54.

5 (A) and 5 (B) are diagrams schematically illustrating the optical conversion of the image of the display panel 40A by the optical member 50. The display panel 40A, the concave mirror 52, and the plane mirror 54 are arranged in a three-dimensional positional relationship as shown in FIG. 5A, and a mirror image X of the image of the concave mirror 52 is generated on the other side of the plane mirror 54. FIG. 5B shows an example in which the image of the display panel 40A is converted. The display image of the display panel 40A is projected on the concave mirror 52 with a sense of depth due to the concave mirror effect, and the image projected on the concave mirror 52 is further reflected by the plane mirror 54. By appropriately adjusting the position and angle of the plane mirror 52, the driver U can see the image projected on the concave mirror 52 near the position where the conventional optical side mirror will be installed through the side window of the vehicle. You can see the virtual image X. The image of the concave mirror 52 is an image given a sense of depth, that is, the virtual image X is an image having a sense of depth. Furthermore, since the position of the virtual image X is near the position where the conventional optical side mirror is installed, the driver U can feel the natural width of the vehicle and the spatial distance as in the case of the conventional optical side mirror. You can see the captured image. In the above embodiment, the relationship between the display panel on the driver's seat side and the optical member has been described, but the display panel on the passenger seat side and the optical member are similarly configured.

As described above, according to the present embodiment, the image displayed on the display panel 40A can be converted into an image having a sense of depth, a sense of vehicle width, and a sense of spatial distance by using the concave mirror 52 and the plane mirror 54. The visibility of the electronic side mirror can be improved.

In the above embodiment, the concave mirror 52 and the plane mirror 54 are used as the optical member 50, but other optical members that produce the same optical action may be further used. For example, it is possible to use a lens for adjusting the magnification of the image, or another prism or mirror for changing the optical path length or optical direction.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the specific embodiments, and various modifications and modifications are made within the scope of the gist of the invention described in the claims. It can be changed.

10: Vehicle display device 20: Camera 30: Image processing device 40: Display device 50: Optical member 52: Concave mirror 54: Plane mirror

Claims (8)

An imaging means that images the surroundings of the vehicle,
A display means that receives imaging data from the imaging means and displays an image of the surroundings of the vehicle.
A concave mirror that projects an image displayed on the display means,
It has a plane mirror that reflects the image projected by the concave mirror toward the space inside the vehicle.
The display means is arranged on the dashboard below the A-pillar so that the display surface faces upward, the concave mirror is arranged in the vicinity of the display means so as to project an image of the display means, and the plane mirror is said. Arranged in the optical axis direction of the concave mirror so as to reflect the image of the concave mirror,
The plan mirror is a vehicle display device that creates a virtual image of an image projected by the concave mirror on the outside of the vehicle. The vehicle display device according to claim 1, wherein the plane mirror reflects an image projected by the concave mirror toward the driver's seat side in the vehicle. The vehicle display device according to claim 1, wherein the display means is horizontally arranged on a dashboard. The vehicle display device according to claim 3, wherein the plane mirror generates a virtual image of an image projected by the concave mirror at a position where an optical side mirror can be installed. The imaging means includes a plurality of imaging cameras that image the rear side of the vehicle, and the display means includes a plurality of display panels that display images captured by the plurality of imaging cameras. One of the vehicle display devices. The vehicle display device according to claim 5, wherein the plurality of display panels are arranged in the dashboard. The vehicle display device according to claim 1, wherein the concave mirror and the planar mirror are adjustable in position or angle. The vehicle display device according to any one of claims 1 to 7, wherein the vehicle display device includes an electronic side mirror.

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