JP2003087779A - 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 projecting part 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 a vehicle projection part such as a spare tire is previously stored in a vehicle index database 6 for showing the vehicle projecting part such as the spare tire protruded 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. When there is a protrusion such as a spare tire at the rear end of the vehicle, it cannot be said that the positional relationship between the vehicle and obstacles around the vehicle can be sufficiently grasped. That is, FIG.
The conventional vehicle 21 and CCD (Charge Coupled Dev) shown in
ice) When the spare tire 23 or the like is attached to the rear end of the vehicle as in the positional relationship with the camera 2, when the spare tire 23 is reflected in the image, the blind spot area is increased and the surrounding area is increased. Since the situation disappears, the spare tires should be prevented from appearing in the image as much as possible in FIGS. 10 and 11.
As shown in, the mounting position and the angle of view of the CCD camera 2 are often adjusted (conventional example after improvement). in this case,
The spare tire 23 is not displayed in the image,
For example, as shown in FIG. 12, the positional relationship between the obstacle 24 around the vehicle and the spare tire 23 could not be determined from the limit line (bumper rear end 51) on the screen displayed in the image. . Even if a part of the spare tire 23 is displayed in the image, the blind spot area increases as described above, and the rear end portion of the spare tire 23 cannot be directly photographed, so that the obstacles around the vehicle cannot be sufficiently captured. There is a problem that the positional relationship between the spare tire 23 and the spare tire 23 cannot be determined from the image.

The present invention has been made in view of the above-mentioned problems, and a rear view display for a vehicle for displaying information on a protruding portion of the vehicle to an occupant of the vehicle together with a rear view image of the vehicle taken by the image pickup means. The purpose is to provide a 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 a vehicle occupant, a vehicle projecting portion projecting rearward from a rear reference position of the vehicle. A vehicle index storage unit that stores an index in advance (for example, the vehicle index database 6 of the embodiment) and an image composite display that displays the vehicle index by combining the vehicle index at a position corresponding to the vehicle protrusion in the rear view image. Means (for example, the image synthesis display unit 7 of the embodiment). With the above-described configuration, the vehicle rear reference position and the vehicle protrusion that cannot be actually confirmed in the rear view image of the vehicle are displayed in the vehicle index storage unit in the form of, for example, an image combining display unit in the form of an index by a line or a picture. It becomes possible to notify the occupant of the vehicle of information on the distance necessary for the vehicle projection to be prevented from coming into contact with the obstacles around the vehicle by using the display.

According to a second aspect of the present invention, there is provided a vehicle rear view display device according to the first aspect, wherein the vehicle rear reference position is such that the vehicle rear reference position is a rear end surface of a bumper attached to the vehicle rear portion ( For example, the rear end of the bumper 22 and the rear end 51) of the bumper of the embodiment, and the vehicle protrusion is a spare tire attached to the rear end of the vehicle (for example, the spare tire 23 of the embodiment). And With the above configuration, the spare tire that cannot be actually confirmed in the rear view image of the vehicle together with the rear end face of the bumper is displayed in the vehicle index storage means in the form of an image combining display means in the form of an index such as a line or a picture. By using the composite display, it becomes possible to notify the occupant of the vehicle of information on the distance required for the spare tire not to contact the obstacles around the vehicle.

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 projects the vehicle protrusion onto the road surface. It is characterized in that it has a curved shape. With the above configuration, it becomes possible to notify the occupant of the vehicle of the information of the space actually occupied by the vehicle protrusion as more detailed information.

[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. Here, for simplification of description, a spare tire attached to the rear end of the vehicle as the vehicle protrusion will be described as an example. 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. And a speaker 5 for displaying approaching obstacles to the occupants of the vehicle 21 by voice or the like.

In addition, the control unit 3 is previously shown in FIGS. 9 and 10.
A vehicle index database 6 that stores in advance a vehicle index representing the spare tire 23 for displaying on the rear view image the spare tire 23 (vehicle projection) that projects rearward from the rear reference position of the vehicle 21 shown in FIG. An image synthesis display unit 7 that synthesizes the rear view image captured by the camera 2 and the vehicle index stored in the vehicle index database 6 and displays the image on the monitor device 4 is included.

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 vehicle rear view display device uses a vehicle projection portion projecting rearward from a rear reference position of a vehicle based on a vehicle projection portion in a rear view image. A case will be described in which a vehicle index represented by a line is synthetically displayed at the position. FIG. 2 shows a rear view display device 1 for a vehicle,
4 is a flowchart showing an operation when a rear view image is displayed on the monitor device 4. First, the control unit 3 of the vehicle rear view display device 1 starts the engine in response to an ignition control signal to set the vehicle 21 in a travelable state. It is determined whether there is any (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 spare tire 23 from the vehicle index database 6 (step S6). Then, a vehicle index representing the spare tire 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 spare tire end line 56 is displayed as a vehicle index indicating the position of the rear end of the spare tire 23, which is not actually displayed in the rear view image. Therefore, as shown in FIG. 4, the occupant of the vehicle 21 can park the vehicle 21 close to the obstacle 24 just before the obstacle 24 contacts the spare tire 23.

(Second Embodiment) Next, as a second embodiment, a vehicle rear view display device has a vehicle projecting portion projecting rearward from a rear reference position of a vehicle and a vehicle projecting portion in a rear view image. A case will be described in which the vehicle protrusion is combined and displayed as a vehicle index represented by a picture in a shape projected on the road surface at a position based on the section. Here, the rear view display device 1 for a vehicle is used.
However, the operation for displaying the rear view image on the monitor device 4 is the same as that of the first embodiment. Further, the spare tire 23 in which the vehicle protruding portion is also attached to the rear end portion of the vehicle 21 will be described as an example.

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 spare tire 23 in which the actual object is not displayed in the rear view image, a spare tire end line is used as a vehicle index represented by a pictorial projection of the spare tire 23 on the road surface. 57
Is displayed. Further, 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 spare tire 23 is clearly displayed on the rear view image. Therefore, as shown in FIG. 7, the occupant of the vehicle 21 avoids the pole-shaped obstacle 25 so that the spare tire 23 does not come into contact with the pole-shaped obstacle 25, and the vehicle 21 (bumper 22).
The vehicle 21 can be parked close to the pole-shaped obstacle 25 until the pole-shaped obstacle 25 comes into contact with the vehicle.

In the above-described embodiment, the spare tire 23 attached to the rear end of the vehicle 21 is described as an example of the vehicle protrusion of the vehicle 21, but the amount of protrusion of the vehicle protrusion is known in advance. Any ski carrier or the like can be used as long as it can create a vehicle index according to the amount of protrusion.

As described above, the vehicle rear view display device 1 according to the present embodiment displays a portion such as a spare tire or a ski carrier protruding from the rear end of the vehicle as a line or a picture in the rear view image. This makes it possible to park the vehicle as close as possible to the surrounding obstacles while surely avoiding contact between the protruding portion and the obstacles around the vehicle. Further, in particular, as in the second embodiment, by displaying the shape of the projecting portion projected on the road surface in the rear view image, obstacles around the vehicle have a width sufficiently smaller than the lateral width of the vehicle, such as a pole. If it is an obstacle, the pole can be parked so that the protrusion does not come into contact with the pole.

[0020]

As described above, according to the first aspect of the present invention, the vehicle rear reference position and the vehicle protrusion that cannot be actually confirmed in the rear view image of the vehicle are stored in the vehicle index storage means in advance. For example, it is possible to notify the occupant of the vehicle of information on the distance necessary for the vehicle protrusion to avoid contact with obstacles around the vehicle, by performing composite display using the image combining display means in the form of an index such as a line or a picture. become able to. Therefore, the effect that the vehicle occupant can park the vehicle as close as possible to the surrounding obstacles while leaving a distance necessary for the vehicle protrusion not to contact the obstacles around the vehicle. .

According to the second aspect of the present invention, the spare tire which cannot be actually confirmed in the rear view image of the vehicle together with the rear end surface of the bumper is formed by, for example, a line or a picture stored in advance in the vehicle index storage means. It is possible to perform composite display in the form of an index using the image composite display means, and notify the occupant of the vehicle of information on the distance required for the spare tire not to contact an obstacle around the vehicle. Therefore, the effect that the occupant of the vehicle can park the vehicle by approaching the obstacles in the surroundings to the utmost limit by leaving a distance necessary for the spare tire not to contact the obstacles around the vehicle. can get. According to the invention described in claim 3, as more detailed information, it becomes possible to notify the occupant of the vehicle of the information of the space actually occupied by the vehicle protrusion.
Therefore, the occupant of the vehicle can actually secure the space occupied by the vehicle protrusion and can park the vehicle while avoiding obstacles around the vehicle.

[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 drawing showing a positional relationship between a vehicle and a camera of an improved conventional example.

FIG. 11 is a drawing showing a positional relationship between a vehicle and a camera of a conventional example after improvement.

FIG. 12 is a diagram showing a relative position between a vehicle and an obstacle when parked using the improved 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 Spare tire (vehicle protrusion) 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 G08B 21/00 G08B 21/00 EN G08G 1/16 G08G 1 / 16 CF Term (reference) 5C054 CC05 EA05 FC12 FE13 FE19 FF07 HA30 5C086 AA53 BA22 CA28 CB36 DA02 DA33 EA45 FA01 FA18 5H180 AA01 CC04 LL02 LL07 LL08

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, wherein the vehicle projection protrudes rearward from a rear reference position of the vehicle. A vehicle index storage unit that stores in advance a vehicle index representing a portion, and a position corresponding to the vehicle protrusion in the rear view image,
An image rearrangement display device for a vehicle, comprising: an image combination display means for combining and displaying the vehicle index. 2. The vehicle rear portion reference position is a rear end surface of a bumper attached to the rear portion of the vehicle, and the vehicle protruding portion is a spare tire attached to the rear end portion of the vehicle. The rear view display device for a vehicle according to claim 1. 3. The vehicle rear view display device according to claim 1, wherein the vehicle index has a shape in which the vehicle protrusion is projected onto a road surface.