JP3977042B2 - Rear view display device for vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicular rear view display device that is mounted on a vehicle and displays a rear view image of the vehicle taken by an image pickup unit to an occupant of the vehicle.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a vehicular rear view display device that captures a rear view image of a host vehicle by an imaging unit and displays the rear view image on a monitor device in the vicinity of a driver's seat as auxiliary information for driving of a vehicle occupant is known. .
Among such devices, for example, Japanese Patent Laid-Open No. 10-151991 discloses a camera that captures an area behind a vehicle, a vehicle width line that indicates the width of the vehicle in an image captured by the camera, and a distance from the vehicle. There is disclosed one provided with a display means for synthesizing and displaying a distance line indicating.
In this device, the line width and line color of the distance line in the vehicle rear image displayed by the display means are changed according to the distance from the vehicle, and the distance line and the vehicle are changed according to the change in the vehicle inclination and the vehicle height. Correcting the display position of the width line provides the vehicle occupant with accurate distance and vehicle width information. In this device, the rear end of the vehicle is displayed in the image so that the vehicle occupant recognizes the positional relationship between the obstacles around the vehicle and the vehicle.
FIG. 8 is an example of a screen displayed by the conventional vehicular rear view display device as described above, and a bumper imaged within the angle of view of the camera in order to confirm the position of the host vehicle in the rear view image. Along with the rear end 51, a tire width line 55 indicating a tire trajectory, and a distance index indicating a distance from the bumper rear end 51 include a 1m line 52 from the bumper rear end, a 2m line 53 from the bumper rear end, and a bumper rear end. It is displayed as a 3m line 54.
[0003]
[Problems to be solved by the invention]
However, in the conventional apparatus as described above, although the rear end portion of the vehicle is displayed in the image, the positional relationship between the obstacles around the vehicle and the vehicle can be recognized, but the displayed distance line and the actual vehicle The position of the vehicle does not take into account the space for opening the tailgate of the vehicle (the rear door of the vehicle that opens behind the rear end of the vehicle when it is opened). There was a problem that the tailgate could not be opened.
That is, the positional relationship between the vehicle 21 shown in FIG. 9, the rear end portion of the bumper 22 (bumper rear end 51 in FIG. 8) captured by the CCD (Charge Coupled Device) camera 2, and the obstacle 24 around the vehicle 21. As described above, if the tailgate 23 provided in the vehicle 21 is not intended to be opened, the vehicle 21 can be parked close to the obstacle 24 to the limit by using the conventional vehicle rear view display device. .
However, when the vehicle 21 is parked with the intention of opening the tailgate 23 provided in the vehicle 21, for example, as shown in FIG. 10, the positions of the obstacle 24 around the vehicle and the opened tailgate 23. The relationship cannot be determined from the limit line (bumper rear end 51) on the screen displayed in the image, and the occupant of the vehicle 21 leaves the space for opening the tailgate 23 while leaving the vehicle 21 I was unable to park near the obstacle 24.
[0004]
The present invention has been made in view of the above problems, and displays a vehicle rear view that displays information about the movable range of a vehicle tailgate to a vehicle occupant together with a vehicle rear view image taken by an imaging means. An object is to provide an apparatus.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, a vehicle rear view display apparatus according to the invention of claim 1 is an image pickup means (for example, a CCD camera according to the embodiment) for photographing a region behind the vehicle (for example, the vehicle 21 according to the embodiment). 2) In the vehicular rear view display device that displays the rear view image obtained in 2) to the vehicle occupant, the rear reference position of the vehicle (for example, the rear end of the bumper 22 or the rear end 51 of the bumper) is rearward. Vehicle index storage means (for example, the vehicle index database 6 of the embodiment) for storing in advance a vehicle index representing the shape of the opening / closing locus of the rear door of the vehicle to be opened (for example, the tailgate 23 of the embodiment) projected on the road surface. And an image composition display means for synthesizing and displaying the vehicle index at a position corresponding to the opened rear door in the rear view image (for example, an image composition display unit of the embodiment) Characterized by comprising a) a.
With the above configuration, the state in which the rear door of the vehicle, which cannot be confirmed during the parking operation of the vehicle, in the rear view image of the vehicle, together with the vehicle rear reference position, is stored in advance in the vehicle index storage means, for example, a line or a picture In the form of an index, the image is displayed using the image composition display means, and after the vehicle is parked, information on the distance necessary to prevent the rear door from touching obstacles around the vehicle when actually opening and closing the rear door of the vehicle is displayed. The vehicle occupant can be notified.
[0006]
In addition , as more detailed information, after the vehicle is parked, when the rear door of the vehicle is actually opened and closed, the information on the space necessary for the rear door not to contact obstacles around the vehicle may be notified to the vehicle occupant. become able to.
[0007]
According to a second aspect of the present invention, there is provided a rear view display device for a vehicle, which is obtained by an imaging means (for example, the CCD camera 2 of the embodiment) that captures an area behind the vehicle (for example, the vehicle 21 of the embodiment). In the vehicular rear view display device that displays an image to a vehicle occupant, the rear door of the vehicle is opened rearward from the rear reference position of the vehicle (for example, the rear end of the bumper 22 and the rear end 51 of the bumper). According to vehicle index storage means (for example, the vehicle index database 6 of the embodiment) for preliminarily storing a vehicle index representing (for example, the tailgate 23 of the embodiment), and the opened rear door in the rear view image. the position, and an image synthesizing display unit for displaying by combining the vehicle indicator (e.g. embodiment image synthesizing display unit 7), said vehicle indicator storage means, stepwise opening and closing maintain Friendly Storing a plurality of vehicle indicators corresponding to the opening amount of Do the rear door, the image synthesizing display unit, and displaying by combining the plurality of vehicle indicators to the rear view image.
With the above configuration, as detailed information, after the vehicle is parked, information on stepwise distances or spaces necessary for the rear door not to contact obstacles around the vehicle when actually opening and closing the rear door of the vehicle. Can be notified to the vehicle occupant.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a vehicle rear view display device according to an embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, a vehicular rear view display device 1 according to the present embodiment includes a CCD camera provided at a rear portion of a vehicle 21 in order to take a rear view image of the vehicle 21 shown in FIGS. 9 and 10. 2 and a control unit 3 including a CPU (Central Processing Unit) that controls the operation of each part of the vehicle rear view display device by executing an application program for image display control, and a rear view image output by the control unit 3 Is displayed to the occupant of the vehicle 21 and a speaker 5 is used to display the approach of the obstacle to the occupant of the vehicle 21 by voice or the like.
The vehicle 21 is provided with a tailgate 23 having a notch mechanism that can be opened and closed in stages as shown in FIG.
[0009]
Further, the control unit 3 displays the tailgate 23 (rear door of the vehicle) that is opened rearward from the rear reference position of the vehicle 21 shown in FIGS. 9 and 10 on the rear view image. The vehicle index database 6 for storing the vehicle index representing the opened tailgate 23 in advance, the rear view image captured by the CCD camera 2 and the vehicle index stored in the vehicle index database 6 are synthesized and monitored. An image composition display unit 7 to be displayed on the device 4 is included.
[0010]
Further, the control unit 3 has an ignition control signal indicating whether or not the engine is started as a control signal for image composition display, and a reverse instruction signal indicating whether or not the shift position of the transmission is at the reverse position. And a parking switch signal indicating whether or not the parking brake is in operation and a light control signal indicating whether or not the light is lit, an ignition circuit, a shift position sensor, a parking brake switch, and a light lit, respectively. It is input from a circuit (both not shown).
[0011]
Next, the operation of the vehicular rear view display device according to the present embodiment will be described with reference to the drawings.
(First embodiment)
First, as a first embodiment, a vehicle rear view display device is configured such that a vehicle rear door opened rearward from a rear reference position of the vehicle is based on the opened rear door in the rear view image. Next, a description will be given of a case where the combined display is performed as a vehicle index represented by a line. FIG. 2 is a flowchart showing an operation when the vehicle rear view display device 1 displays a rear view image on the monitor device 4. First, the control unit 3 of the vehicle rear view display device 1 displays an ignition control signal. Thus, it is determined whether or not the engine is started and the vehicle 21 is ready to travel (step S1).
[0012]
In step S1, if the engine is not started and the vehicle is not capable of traveling (NO in step S1), the image composition display unit 7 of the control unit 3 is displayed if an image is displayed on the monitor device 4. This is erased (step S2) and the engine is started and the vehicle 21 is allowed to run.
On the other hand, in step S1, when the engine is started and the vehicle can travel (YES in step S1), the control unit 3 next releases the parking brake by the parking switch signal and the vehicle can move. It is determined whether or not (step S3).
If the vehicle is not movable in step S3 (NO in step S3), the image composition display unit 7 of the control unit 3 deletes the image if it is displayed on the monitor device 4 (step S2). ), Return to step S1, repeat the above operation, and wait for the parking brake to be released and the vehicle 21 to move.
[0013]
In step S3, when the vehicle is movable (YES in step S2), the control unit 3 determines whether or not the vehicle 21 is about to reverse based on the reverse instruction signal (step S4).
In step S4, if the vehicle 21 is not going to reverse (NO in step S4), the image composition display unit 7 of the control unit 3 deletes the image if it is displayed on the monitor device 4 (step S2). ), Return to step S1, repeat the above operation, and wait for the vehicle 21 to reverse.
If the vehicle 21 is about to move backward in step S4 (YES in step S4), the image composition display unit 7 of the control unit 3 acquires a rear view image of the vehicle 21 from the CCD camera 2 (step S5).
[0014]
Next, the image composition display unit 7 acquires a vehicle index representing the tailgate 23 from the vehicle index database 6 (step S6).
Then, a vehicle index representing the tailgate 23 is synthesized with the rear view image (step S7) and displayed on the monitor device 4 (step S8).
When the rear view image combined with the vehicle index is displayed on the monitor device 4, the image composition display unit 7 of the control unit 3 returns to step S1 and repeats the above-described operation.
When displaying on the monitor device 4, the control unit 3 determines whether or not the light of the vehicle 21 is lit (whether or not the vehicle 21 is dark) based on the light control signal, and displays the rear view on the monitor device 4. The brightness and contrast of the image may be automatically adjusted.
[0015]
FIG. 3 is a diagram showing an example of the display of the rear view image according to the first embodiment, in addition to the distance index 52 to the distance index 54 indicating the distances of 1 m, 2 m, and 3 m from the rear end of the conventional bumper, respectively. As a vehicle index indicating the position of the rear end of the tailgate 23 in which the actual object is not displayed in the rear view image, a plurality of vehicle indices corresponding to the opening amount of the tailgate 23 that can be maintained open and closed in stages are tailgate lines. A56 and tail gate line B57 are displayed.
Therefore, as shown in FIG. 4, the occupant of the vehicle 21 leaves a space for opening the tailgate 23 to the rear of the vehicle 21 to the limit just before the obstacle 24 comes into contact with the opened tailgate 23. The vehicle 21 can be parked by approaching the obstacle 24.
[0016]
(Second embodiment)
Next, as a second embodiment, the vehicle rear view display device is based on a rear door of a vehicle that is opened rearward from the rear reference position of the vehicle, based on the opened rear door in the rear view image. A case will be described in which the opening / closing locus of the rear door is combined and displayed at a position as a vehicle index represented by a picture projected on the road surface.
The operation when the vehicular rear view display device 1 displays the rear view image on the monitor device 4 is the same as that of the first embodiment.
[0017]
FIG. 5 is a view showing an example of the display of the rear view image according to the second embodiment, in addition to the distance index 52 to the distance index 54 indicating the distances of 1 m, 2 m, and 3 m, respectively, from the rear end of the conventional bumper. In order to represent the position of the rear end of the tailgate 23 where no real object is displayed in the rear view image, the opening and closing of the tailgate 23 is opened and closed in stages as a vehicle index represented by a picture projected on the road surface. A tail gate line C58, a tail gate line D59, and a tail gate opening / closing locus line 60 corresponding to the opening amount of the tail gate 23 that can be maintained are displayed.
As shown in FIG. 6, when the obstacle around the vehicle is, for example, a pole-shaped obstacle 25, the positional relationship between the pole-shaped obstacle 25 and the opening / closing locus of the tailgate 23 is displayed on the rear view image. Since the information is clearly displayed, as shown in FIG. 7, the passenger of the vehicle 21 avoids the pole-shaped obstacle 25 so that the tailgate 23 opened to the pole-shaped obstacle 25 does not contact the vehicle 21. It is possible to park by approaching the pole-shaped obstacle 25.
[0018]
As described above, the vehicular rear view display device 1 according to the present embodiment displays a state in which the rear door of the vehicle that cannot be confirmed during the parking of the vehicle is opened as a line or a picture on the rear view image. After the vehicle is parked, when the vehicle's tailgate is actually opened and closed, the vehicle must be as close as possible to the surrounding obstacles while ensuring the necessary distance so that the tailgate does not touch the obstacles around the vehicle. It is possible to park.
In addition, particularly as in the second embodiment, the shape of the opening / closing locus of the tailgate projected on the road surface is displayed in the rear view image, so that obstacles around the vehicle are sufficient for the lateral width of the vehicle such as a pole. In the case of an obstacle with a small width, it is possible to park while avoiding the pole so that the opening / closing locus of the tailgate does not interfere with this pole.
[0019]
【The invention's effect】
As described above, according to the first aspect of the present invention, the vehicle index memory stores the state in which the rear door of the vehicle that cannot be confirmed during the parking operation of the vehicle is opened in the rear view image of the vehicle together with the vehicle rear reference position. For example, when the vehicle is parked, the rear door becomes an obstacle around the vehicle when it is actually opened and closed after the vehicle is parked. It becomes possible to notify the vehicle occupant of information on the distance necessary to avoid contact.
Therefore, after the vehicle is parked, the vehicle occupant can park the vehicle by approaching the surrounding obstacles as much as possible, leaving a necessary distance when actually opening and closing the rear door of the vehicle. It is done.
[0020]
Further , after the vehicle is parked, the vehicle occupant can secure a necessary space when actually opening and closing the rear door of the vehicle and can park the vehicle while avoiding obstacles around the vehicle. .
According to the second aspect of the present invention, as further detailed information, after the vehicle is parked, stepwise steps necessary for the rear door not to contact obstacles around the vehicle when the rear door of the vehicle is actually opened and closed. Information on distance or space can be notified to the vehicle occupant.
Accordingly, an effect is obtained that the vehicle occupant can park the vehicle at a position corresponding to the amount that the vehicle occupant wants to open the rear door of the vehicle.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a vehicle rear view display device according to an embodiment of the present invention.
FIG. 2 is a flowchart showing an operation of the vehicular rear view display device according to the embodiment;
FIG. 3 is a diagram showing an example of a display of a rear view image according to the first example of the embodiment.
FIG. 4 is a diagram showing a relative position between the vehicle and an obstacle when the vehicle is parked using the vehicular rear view display device according to the first example of the embodiment;
FIG. 5 is a diagram showing an example of a display of a rear view image according to a second example of the embodiment.
FIG. 6 is a drawing showing an example of an obstacle display in a rear view image according to the embodiment.
FIG. 7 is a diagram showing a relative position between the vehicle and the obstacle when parked using the vehicular rear view display device according to the second example of the embodiment;
FIG. 8 is a diagram illustrating an example of a display of a rear view image according to a conventional example.
FIG. 9 is a drawing showing the positional relationship between a vehicle and a camera of a conventional example.
FIG. 10 is a diagram illustrating a relative position between a vehicle and an obstacle when parked using a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vehicle rear view display apparatus 2 CCD camera (imaging means)
3 Control unit 6 Vehicle index database (vehicle index storage means)
7 Image composition display section (image composition display means)
21 Vehicle 22 Bumper 23 Tailgate (rear door)
51 Pumper rear end (vehicle rear reference position)

Claims (2)

In a vehicular rear view display device that displays a rear view image obtained by an imaging means for photographing a region behind the vehicle to a vehicle occupant,
Vehicle index storage means for storing in advance a vehicle index representing a shape obtained by projecting on the road surface an opening / closing locus of the rear door of the vehicle that is opened rearward from the rear reference position of the vehicle;
A vehicular rear view display device, comprising: an image compositing display means for compositing and displaying the vehicle index at a position corresponding to the opened rear door in the rear view image. In a vehicular rear view display device that displays a rear view image obtained by an imaging means for photographing a region behind the vehicle to a vehicle occupant,
Vehicle index storage means for storing in advance a vehicle index representing a rear door of the vehicle in a state opened rearward from a rear reference position of the vehicle;
Image combining display means for combining and displaying the vehicle index at a position corresponding to the opened rear door in the rear view image ;
The vehicle index storage means is
Storing a plurality of vehicle indices according to the opening amount of the rear door that can be opened and closed in stages;
The image composition display means is
A vehicular rear view display device that combines and displays the plurality of vehicle indices on the rear view image .

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