JP2003087780A - Rear view display device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rear view display device for vehicle displaying the rear view picture of a vehicle, which is photographed by an image pickup means, and information on the movable range of the tail gate of the vehicle to the crew of the vehicle. SOLUTION: A CCD camera 2 photographs the rear view picture of the vehicle and inputs it to a picture synthesis display part 7. A vehicle index showing the opened tail gate is previously stored in a vehicle index database 6 for showing the tail gate of the vehicle, which is in a state where it is opened backward from the rear end of a bumper being the rear reference position of the vehicle, on a rear view picture. The picture synthesis display part 7 composites the vehicle index stored in the vehicle index database 6 and the rear view picture which the CCD camera 2 photographs and displays it on a monitoring device 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle rear view display device mounted on a vehicle and displaying a rear view image of the vehicle taken by an image pickup means to an occupant of the vehicle.

[0002]

2. Description of the Related Art Conventionally, a rear view display device for a vehicle which captures a rear view image of a vehicle by an image pickup means and displays the rear view image on a monitor device near a driver's seat as auxiliary information for driving an occupant of the vehicle. It has been known. In such an apparatus, for example, in Japanese Patent Laid-Open No. 10-151991, 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 It is disclosed that the display means for combining and displaying the distance line indicating is displayed. In this device, the line width and the 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 height are changed depending on the inclination and the vehicle height of the vehicle. By correcting the display position of the width line, the occupant of the vehicle is provided with accurate information on the distance and the vehicle width. Further, in this apparatus, the occupant of the vehicle is made to recognize the positional relationship between the vehicle and an obstacle around the vehicle by displaying the rear end portion of the vehicle in the image. FIG. 8 is an example of a screen displayed by the conventional rear view display device for a vehicle as described above, and a bumper imaged within the angle of view of the camera for confirming the position of the vehicle in the rear view image. Along with the rear end 51, the tire width line 55 indicating the passage path of the tire and the distance index indicating the distance from the bumper rear end 51 are the 1 m line 52 from the bumper rear end, the 2 m line 53 from the bumper rear end, and the bumper rear end. It is displayed as a 3m line 54.

[0003]

However, in the conventional device as described above, the positional relationship between the vehicle and the obstacles around the vehicle can be recognized by displaying the rear end of the vehicle in the image. Because the positional relationship between the displayed distance line and the actual vehicle does not take into consideration the space for opening the tailgate of the vehicle (the rear door of the vehicle that opens to the rear of the vehicle when it is opened). , There was a problem that the tailgate of the vehicle could not be opened after parking the vehicle. That is, the vehicle 21 shown in FIG.
And the rear end of the bumper 22 photographed by the CCD (Charge Coupled Device) camera 2 (the rear end 51 of the bumper in FIG. 8).
If there is no intention to open the tailgate 23 provided in the vehicle 21 as in the positional relationship between the vehicle and the obstacles 24 around the vehicle 21, the conventional vehicle rear view display device can be used. The obstacle 24 can be parked as close as possible. However, when the vehicle 21 is parked with the intention of opening the tailgate 23 provided in the vehicle 21, the positions of the obstacles 24 around the vehicle and the opened tailgate 23 as shown in FIG. 10, for example. The relationship cannot be judged from the limit line on the screen (bumper rear end 51) displayed in the image, and the occupant of the vehicle 21 leaves the vehicle 21 while leaving a space for opening the tailgate 23. It was not possible to park near the obstacle 24.

The present invention has been made in view of the above problem, and is for a vehicle that displays information on the movable range of the tailgate of the vehicle to an occupant of the vehicle together with a rear view image of the vehicle taken by the image pickup means. An object is to provide a rear view display device.

[0005]

In order to solve the above problems, a rear view display device for a vehicle according to the invention of claim 1 is an image pickup device for photographing a region behind a vehicle (for example, a vehicle 21 in the embodiment). In a vehicle rear view display device for displaying a rear view image obtained by means (for example, the CCD camera 2 of the embodiment) to an occupant of the vehicle, a rear reference position of the vehicle (for example, a rear end of the bumper 22 of the embodiment). , Vehicle index storage means (eg, vehicle index of the embodiment) that stores in advance a vehicle index indicating the rear door (eg, the tailgate 23 of the embodiment) of the vehicle that is opened rearward from the bumper rear end 51). The database 6) and an image combination display unit (for example, the image combination of the embodiment) that combines and displays the vehicle index at a position corresponding to the opened rear door in the rear view image. Characterized by comprising a display unit 7) and. With the above configuration, along with the vehicle rear reference position,
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, is opened is used by the image combining display means in the form of an index such as a line or a picture stored in advance in the vehicle index storage means. After the vehicle is parked, it is possible to notify the vehicle occupant of the distance required to prevent the rear door from contacting obstacles around the vehicle when the vehicle is actually opened and closed. Become.

A vehicle rear view display device according to a second aspect of the present invention is the vehicle rear view display device according to the first aspect, wherein the vehicle index has a shape obtained by projecting an opening / closing locus of the rear door onto a road surface. It is characterized by doing. With the above configuration, as further detailed information, after the vehicle is parked, the occupant of the vehicle is notified of the information on the space required for the rear door not to come into contact with obstacles around the vehicle when the rear door of the vehicle is actually opened and closed. You will be able to.

A vehicle rear view display device according to a third aspect of the present invention is the vehicle rear view display device according to the first or second aspect, wherein the vehicle index storage means can be opened and closed in stages. It is characterized in that a plurality of vehicle indexes corresponding to the opening amounts of the rear doors are stored, and the image synthesis display means synthesizes and displays the plurality of vehicle indexes on the rear view image. With the above configuration, as more detailed information, after parking the vehicle, information about the stepwise distance or space necessary for the rear door not to contact obstacles around the vehicle when the rear door of the vehicle is actually opened and closed. Will be able to notify the occupants of the vehicle.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle rear view display device according to an embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a vehicle rear view display device 1 of the present embodiment is a CCD camera provided at a rear portion of the vehicle 21 for capturing 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 unit of the rear-view display device for vehicle by executing an application program for image display control, and a rear-view image output by the control unit 3. A monitor device 4 for displaying the information to an occupant of the vehicle 21,
The speaker 5 is provided for displaying 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.

In addition, the control unit 3 is previously shown in FIGS. 9 and 10.
The vehicle index indicating the opened tailgate 23 for preliminarily storing the tailgate 23 (rear door of the vehicle) that is opened rearward from the rear reference position of the vehicle 21 shown in FIG. Vehicle index database 6
And an image combining display unit 7 that combines the rear view image captured by the CCD camera 2 and the vehicle index stored in the vehicle index database 6 and displays the combined image on the monitor device 4.

Further, the control unit 3 indicates, as a control signal for image synthesis display, an ignition control signal indicating whether or not the engine is started, and whether or not the shift position of the transmission is in the reverse position. A reverse command signal, a parking switch signal indicating whether or not the parking brake is operating, and a light control signal indicating whether or not the light is lit are respectively an ignition circuit, a shift position sensor, a parking brake switch, And a light lighting circuit (neither is shown).

Next, the operation of the vehicle rear view display device of this embodiment will be described with reference to the drawings. (First Embodiment) First, as a first embodiment, a rear view display device for a vehicle opens a rear door of a vehicle in a state of being opened rearward from a rear reference position of the vehicle in a rear view image. A case will be described in which a vehicle index represented by a line is combined and displayed at a position based on the rear door. FIG. 2 is a flowchart showing an operation of the vehicle rear-view display device 1 displaying a rear-view image on the monitor device 4. First, the control unit 3 of the vehicle rear-view display device 1 uses the ignition control signal. Thus, it is determined whether the engine is started and the vehicle 21 is in a travelable state (step S1).

In step S1, the engine is not started and the vehicle cannot run (step S1).
(NO of 1), the image composition display unit 7 of the control unit 3 erases the image displayed on the monitor device 4 (step S2), the engine is started, and the vehicle 21 is allowed to run. Wait for 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 then determines whether or not the parking brake is released and the vehicle is movable by the parking switch signal. The determination is made (step S3). When the vehicle is not movable in step S3 (NO in step S3), the image composition display unit 7 of the control unit 3 erases the image displayed on the monitor device 4 (step S2). ), And returns to step S1 to repeat the above-described operation and wait until the parking brake is released and the vehicle 21 becomes movable.

If the vehicle is movable in step S3 (YES in step S2), the controller 3
Determines whether or not the vehicle 21 is about to move backward based on the reverse instruction signal (step S4). Step S
4, when the vehicle 21 is not about to move backward (NO in step S4), the image synthesis display unit 7 of the control unit 3
If the image is displayed on the monitor device 4, the image is erased (step S2), the process returns to step S1, the above-described operation is repeated, and the vehicle 21 waits for the backward movement. If the vehicle 21 is about to move backward in step S4 (YES in step S4), the image combining display unit 7 of the control unit 3 causes the CCD camera 2 to detect the vehicle 21.
A rear view image of is acquired (step S5).

Next, the image synthesis display unit 7 acquires the vehicle index representing the tailgate 23 from the vehicle index database 6 (step S6). Then, the vehicle index representing the tailgate 23 is combined with the rear view image (step S7),
It is displayed on the monitor device 4 (step S8). When the rear view image in which the vehicle index is combined is displayed on the monitor device 4,
The image composition display unit 7 of the control unit 3 returns to step S1 and
The above operation is repeated. In the case of displaying on the monitor device 4, the control unit 3 determines whether or not the light of the vehicle 21 is turned on (whether or not the surroundings of the vehicle 21 are dark) by the light control signal, and the rear visual field displayed on the monitor device 4 is determined. The brightness and contrast of the image may be automatically adjusted.

FIG. 3 is a diagram showing an example of the display of the rear view image according to the first embodiment, which is a distance index 52 to a distance index 52 indicating distances of 1 m, 2 m and 3 m from the rear end of the conventional bumper. In addition to 54, a plurality of vehicle indexes corresponding to the opening amount of the tailgate 23 that can be opened / closed in stages is used 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. It is displayed as a tail gate line A56 and a tail gate line B57. 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, and reaches a limit just before the obstacle 24 contacts the opened tailgate 23. The vehicle 21 can be parked by approaching the obstacle 24.

(Second Embodiment) Next, as a second embodiment, the rear view display device for a vehicle displays a rear view image of a rear door of a vehicle opened rearward from a rear reference position of the vehicle. A case will be described in which the opening / closing locus of the rear door is combined and displayed at a position based on the opened rear door as a vehicle index represented by a picture of a shape projected on the road surface. Here, the rear view display device 1 for a vehicle displays the rear view image on the monitor device 4 here.
The operation in the case of displaying to is the same as that of the first embodiment.

FIG. 5 is a diagram showing an example of the display of the rear view image according to the second embodiment, which is a distance index 52 to a distance index 52 indicating distances of 1 m, 2 m and 3 m from the rear end of the conventional bumper. In addition to 54, in order to represent the position of the rear end of the tailgate 23 in which the actual object is not displayed in the rear view image, as a vehicle index represented by a picture of the opening / closing locus of the tailgate 23 projected on the road surface, A tailgate line C58, a tailgate line D59, and a tailgate opening / closing locus line 60 corresponding to the opening amount of the tailgate 23 that can be maintained open / closed are displayed. Also,
As shown in FIG. 6, when the obstacle around the vehicle is, for example, a pole-shaped obstacle 25, this pole-shaped obstacle 2
Since the positional relationship between 5 and the opening / closing locus of the tailgate 23 is clearly displayed on the rear view image, as shown in FIG.
The occupant of the vehicle 21 can avoid the pole-shaped obstacle 25 and park the vehicle 21 close to the pole-shaped obstacle 25 so that the opened tailgate 23 does not come into contact with the pole-shaped obstacle 25. .

As described above, in the vehicle rear view display device 1 of the present embodiment, the state in which the rear door of the vehicle, which cannot be confirmed during the parking operation of the vehicle, is opened is displayed as a line or a picture on the rear view image. By displaying it, after the vehicle is parked, when the tailgate of the vehicle is actually opened / closed, the distance is ensured so that the tailgate does not come into contact with obstacles around the vehicle, and the vehicle is limited to obstacles around it. Allows you to park closely. Further, in particular, as in the second embodiment, by displaying the shape of the opening / closing locus of the tailgate projected on the road surface in the rear view image, obstacles around the vehicle are sufficiently large with respect to the lateral width of the vehicle such as a pole. If the obstacle has a small width, it will be possible to park without the pole so that the opening / closing locus of the tailgate does not interfere with this pole.

[0019]

As described above, according to the first aspect of the invention, 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, is opened together with the vehicle rear reference position. Is compositely displayed using the image composition display means in the form of an index such as a line or a picture stored in advance in the vehicle index storage means, and after the vehicle is parked, when the rear door of the vehicle is actually opened and closed, the rear door is the vehicle. It becomes possible to notify the occupant of the vehicle of the information on the distance required to avoid contact with surrounding obstacles. Therefore, after the vehicle is parked, the occupant can park the vehicle by leaving a distance necessary for actually opening and closing the rear door of the vehicle and allowing the vehicle to approach the obstacles in the vicinity as much as possible. Be done.

According to the invention described in claim 2, further detailed information is necessary so that the rear door does not come into contact with obstacles around the vehicle when the rear door of the vehicle is actually opened and closed after the vehicle is parked. It becomes possible to notify the occupants of the vehicle of space information. Therefore, after the vehicle is parked, the vehicle occupant can secure the space necessary for actually opening and closing the rear door of the vehicle, and avoid the obstacles around the vehicle to park the vehicle. . According to the invention described in claim 3, as further detailed information, after the vehicle is parked, the stepwise steps required to prevent the rear door from contacting the obstacles around the vehicle when the rear door of the vehicle is actually opened and closed. It becomes possible to notify the occupants of the vehicle of the distance or space information. Therefore, the effect that the occupant of the vehicle can park the vehicle at a position corresponding to the amount of opening of the rear door of the vehicle is obtained.

[Brief description of 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 vehicle rear view display device according to the same embodiment.

FIG. 3 is a diagram showing an example of display of a rear view image according to the first example of the same embodiment.

FIG. 4 is a diagram showing a relative position between a vehicle and an obstacle when the vehicle rear view display device according to the first example of the same embodiment is used for parking.

FIG. 5 is a diagram showing an example of displaying a rear view image according to a second example of the same embodiment.

FIG. 6 is a diagram showing an example of display of an obstacle in a rear view image of the same embodiment.

FIG. 7 is a diagram showing a relative position between a vehicle and an obstacle when parked using the vehicle rear view display device according to the second example of the same embodiment;

FIG. 8 is a diagram showing an example of displaying a rear view image according to a conventional example.

FIG. 9 is a diagram showing a positional relationship between a vehicle and a camera in a conventional example.

FIG. 10 is a diagram showing a relative position between a vehicle and an obstacle when parked using a conventional example.

[Explanation of symbols]

1 Rear view display device for vehicles 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 vehicles 22 bumper 23 Tailgate (rear door) 51 Pamper rear end (vehicle rear reference position)

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B60R 21/00 628 B60R 21/00 628D G08G 1/16 G08G 1/16 C F term (reference) 5C054 FE16 HA30 5H180 AA01 CC04 LL02 LL08 LL11 LL17

Claims (3)

[Claims] 1. A rear view display device for a vehicle, which displays a rear view image obtained by an image pickup means for capturing an area behind a vehicle to an occupant of the vehicle, in a state of being opened rearward from a rear reference position of the vehicle. A vehicle index storage unit that stores in advance a vehicle index representing the rear door of the vehicle, and an image composition that combines and displays the vehicle index at a position corresponding to the opened rear door in the rear view image. A rear view display device for a vehicle, comprising: a display means. 2. The vehicle rear view display device according to claim 1, wherein the vehicle index has a shape in which an opening / closing locus of the rear door is projected on a road surface. 3. The vehicle index storage means stores a plurality of vehicle indexes according to the opening amount of the rear door that can be gradually opened and closed, and the image combination display means displays the plurality of vehicle indexes in the rear view image. The vehicle rear view display device according to claim 1 or 2, wherein the vehicle index of (1) is combined and displayed.