JP2018103921A - Display device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device for a vehicle, which improves a sense of depth, a sense of vehicle width, and a sense of spacial distance between a driver's own vehicle and an object.SOLUTION: A display device 10 for a vehicle according to the present invention includes: imaging cameras 20C and 20D for taking an image of an area behind a lateral part of the vehicle; a display unit 40 for displaying the images taken by the imaging cameras 20C and 20D; a concave mirror 52 for mirroring the image displayed on the display unit 40; and a plane mirror 54 for reflecting the image mirrored by the concave mirror 52. The plane mirror 54 generates a virtual image X of the image of the concave mirror 52 in a position in which an optical side mirror on the outside of the vehicle can be mounted.SELECTED DRAWING: Figure 4

Description

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

  As a technique that replaces the conventional optical side mirror, an electronic side mirror that captures the rear side of a vehicle with a camera and displays the captured image data on a display device such as a liquid crystal display has been developed. Unlike conventional optical side mirrors, electronic side mirrors do not necessarily have to be installed outside the vehicle. A display device can be installed near the driver's door, or a display device can be installed on some of the meters in front of the driver. It can also be installed. Thus, 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 line of sight. 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 captured image or the projected image of the electronic side mirror. In view of these points, the vehicle display device disclosed in Patent Document 1 takes into account the movement of the driver's viewpoint while traveling, reduces the burden on the driver, and reduces discomfort with the optical side mirror. Therefore, a configuration is disclosed in which a distance from the driver's viewpoint to the reflected image formed using a concave mirror is extended. Patent Document 2 discloses a vehicle display device that includes a mirror that reflects an image displayed on a display unit, and changes a viewing range that the driver can visually recognize according to the driver's viewing position. ing.

JP 2009-12080 A JP 2006-040140 A

  As shown in FIG. 6 (A), a conventional electronic side mirror has a display device 300 installed on a driver's door panel, or as shown in FIG. 6 (B). Are provided with display devices 300L and 300R. On these display devices 300, 300L, and 300R, as shown in FIG. 6C, an image obtained by capturing the rear side of the host vehicle M is displayed.

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

  The present invention solves such a conventional problem, and an object of the present invention is to provide a vehicle display device that improves the sense of depth, the sense of vehicle width, and the sense of spatial distance between the vehicle and the object. And

  The display device for a vehicle according to the present invention includes an imaging unit that images the surroundings of the vehicle, a display unit that receives imaging data from the imaging unit and displays an image of the surroundings of the vehicle, and an image displayed on the display unit. A concave mirror for projecting, and a plane mirror for reflecting an image projected by the concave mirror toward the interior space side.

  Preferably, the plane mirror reflects an image projected by the concave mirror toward a driver seat in the vehicle. Preferably, the plane mirror generates a virtual image of an image projected by the concave mirror outside the vehicle. Preferably, the plane mirror generates a virtual image of an image projected by the concave mirror at a position where the optical side mirror can be installed. Preferably, the imaging unit includes a plurality of imaging cameras that capture the rear side of the vehicle, and the display unit includes a plurality of display panels that display images captured by the plurality of imaging cameras. Preferably, the plurality of display panels are arranged in a dashboard of the vehicle. Preferably, the concave mirror and the flat 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, so that the display image of the display means has a sense of depth, and further, 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 a sense of depth, a sense of vehicle width, and a sense of spatial distance equivalent to those of conventional optical side mirrors. This reduces the driver's cognitive load.

It is a figure which shows the whole structure of the display apparatus for vehicles which concerns on the Example of this invention. It is a top view which shows the example of attachment of the imaging camera shown in FIG. It is a figure which shows the example of an imaging with the left and right side cameras. FIG. 4A is a top view showing an example of attachment of a display panel according to an embodiment of the present invention, and FIG. 4B is an upper surface for explaining attachment positions of a concave mirror and a plane mirror which are optical members of this embodiment. FIG. FIG. 5 is a diagram illustrating optical conversion by a display panel according to an embodiment of the present invention using a concave mirror and a plane mirror. It is a figure explaining the subject 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 periphery 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. 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 vehicle width. . The concave mirror and the plane mirror are preferably adjustable in position and angle so as to generate an optimal image for the driver or user. Reflecting the display image of the display device with the concave mirror gives the image a sense of depth due to the concave mirror effect, and further reflecting the image reflected by the concave mirror toward the interior space side with the plane mirror, the image projected on the concave mirror A virtual image is generated outside the vehicle. By making the position of the virtual image preferably the position where the conventional side mirror is present, the captured image can be viewed with a natural sensation as with the optical side mirror.

  Next, 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 illustrating an overall configuration of a vehicle display device according to the present embodiment. The vehicle display device 10 according to the present embodiment includes one or a plurality of imaging cameras 20A to 20D for imaging the periphery of the vehicle, and an image processing device that receives imaging data from the imaging camera and performs image processing on the imaging data. 30, a display device 40 that displays image data processed by the image processing device 30, and an optical member 50 that receives the image displayed by the display device 40 and optically converts the image. Here, four imaging cameras 20A to 20D are illustrated, but the electronic side mirror includes 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 side camera 20D. The front camera 20 </ b> A and the rear camera 20 </ b> D can be used to detect obstacles or the like existing in front of or behind the vehicle and avoid collision with them, and are not essential for the configuration of the electronic side mirror.

  FIG. 2 is a plan view showing an installation example of the 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, and images the rear side of the vehicle from there at a viewing angle θ. It is desirable that the imaging directions (optical axes) of the left camera 20C and the right camera 20D can be arbitrarily adjusted. As a result, it becomes possible to correspond the viewing angle to a different line-of-sight position or posture for each passenger. For example, as shown in FIG. 3, the imaging cameras 20 </ b> C and 20 </ b> D image the other vehicle A that travels behind the host vehicle M and the other vehicle B that travels sideways.

  Data captured by the imaging cameras 20 </ b> A to 20 </ b> D is provided to the image processing device 30. The image processing device 30 performs necessary processing (for example, trimming, adjustment of luminance and color, etc.) on the imaging data so that the imaging data can 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, the display device 40 may actually include one or a plurality of 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 camera 20C and an image captured by the right camera 20D. And a right display panel. These display panels are composed of, for example, a liquid crystal panel or an organic EL panel. Hereinafter, the left display panel and the right display panel for the electronic side mirror are collectively referred to as a display panel 40A. On the display panel 40A, an image obtained by imaging the rear side of the vehicle as shown in FIG. 6C is displayed.

  FIG. 4A is a top view showing the mounting position of the display panel. As shown in the figure, the display panel 40A is disposed substantially horizontally on, for example, the dashboard 60 in the vehicle, particularly at the lower part of the A pillar, that is, the display surface of the display panel is opposite to the contact surface with the dashboard. It is arranged on the side to face the ceiling. However, the display panel 40A may be attached to a position other than this, for example, disposed 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 vehicular display device 10 of the present embodiment further includes an optical member 50 for optically converting an image displayed on the display panel 40A. Preferably, the optical member 50 enters the display image of the display panel 40A, and positions 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 in the vehicle interior space, for example. And a plane mirror 54 that reflects toward the screen.

  4B is a top view showing the positional relationship between the display panel 40A, the concave mirror 52, and the plane mirror 54. FIG. The concave mirror 52 is disposed 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. The concave mirror 52 is preferably attached so that the angle of the optical axis can be adjusted. For example, known means such as a ball joint can be used as the adjusting means. If the optical axis of the concave mirror 52 is tilted somewhat toward the display surface of the display panel 40A, the image by the concave mirror 52 is reflected somewhat downward, and the optical axis is tilted somewhat in the direction away from the display surface of the display panel 40A. Then, 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 projects the image displayed on the display panel 40A with a sense of depth by the concave mirror effect. The curvature of the concave mirror 52 is arbitrary, but if the curvature increases, the concave mirror effect increases, but the distortion of the image also increases.

  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 disposed at a position and an angle such that the 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 in the vicinity of the position where the conventional optical side mirror is installed. It is desirable that the angle of the plane mirror 54 can 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.

  5A and 5B are diagrams schematically illustrating optical conversion of an image on the display panel 40A by the optical member 50. FIG. The display panel 40 </ b> A, 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 an image on the display panel 40A is converted. The display image on the display panel 40 </ b> A is projected on the concave mirror 52 with a sense of depth by the concave mirror effect, and the image projected on the concave mirror 52 is reflected by the plane mirror 54. By appropriately adjusting the position and angle of the plane mirror 52, the driver U can view the image projected on the concave mirror 52 in the vicinity of the position where the conventional optical side mirror over the side window of the vehicle will be installed. A virtual image X can be seen. The image of the concave mirror 52 is an image with a sense of depth, that is, the virtual image X is an image with a sense of depth. Furthermore, since the position of the virtual image X is in the vicinity of the position where the conventional optical side mirror is installed, the driver U has a natural sense of vehicle width and a sense of spatial distance in the same manner as the conventional optical side mirror. A captured image can be seen. In the above embodiment, the relationship between the display panel on the driver's seat side and the optical member has been described. However, the display panel and the optical member on the passenger seat side are configured similarly.

  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 using the concave mirror 52 and the plane mirror 54. The visibility of the electronic side mirror can be improved.

  In the above embodiment, an example in which the concave mirror 52 and the plane mirror 54 are used as the optical member 50 has been described. However, other optical members that cause 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 the optical direction.

  The preferred embodiment of the present invention has been described in detail above. However, the present invention is not limited to the specific embodiment, and various modifications and variations are possible within the scope of the gist of the invention described in the claims. It can be changed.

DESCRIPTION OF SYMBOLS 10: Display apparatus for vehicles 20: Camera 30: Image processing apparatus 40: Display apparatus 50: Optical member 52: Concave mirror 54: Plane mirror

Claims (8)

Imaging means for imaging the surroundings of the vehicle;
Display means for receiving imaging data from the imaging means and displaying an image around the vehicle;
A concave mirror for displaying the image displayed on the display means;
A plane mirror that reflects the image projected by the concave mirror toward the interior space side;
A display device for a vehicle. The vehicle display device according to claim 1, wherein the plane mirror reflects an image projected by the concave mirror toward a driver seat side in a vehicle. The vehicle display device according to claim 1, wherein the plane mirror generates a virtual image of an image projected by the concave mirror outside the vehicle. 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. 5. Any one of claims 1 to 4, wherein the imaging unit includes a plurality of imaging cameras that capture the rear side of the vehicle, and the display unit includes a plurality of display panels that display images captured by the plurality of imaging cameras. The display apparatus for vehicles as described in any one. The vehicle display device according to claim 5, wherein the plurality of display panels are arranged in a dashboard of the vehicle. The vehicular display device according to claim 1, wherein the concave mirror and the flat mirror are adjustable in position or angle. The vehicle display device according to claim 1, wherein the vehicle display device includes an electronic side mirror.

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