JP2005014812A - Vehicle rear displaying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for displaying a rear of a vehicle capable of picking up and displaying an image of a rear of a vehicle with a simple design structure. <P>SOLUTION: A camera 2 is arranged on a roof at a rear part of a vehicle, and its image pick-up direction can be changed. When lock of any of doors A11-D14 is released, an ECU7 transmits drive signals to the camera 2, so as to change the image pick-up direction of the camera 2 to a backward direction with a position of the door as a reference. The picked-up image is transmitted to a display arranged around a seat nearest to the door, and displayed. This make is possible to pick up and display the image of the rear of the vehicle with a simple design structure. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle rear display device that captures and displays the rear of a door when an occupant gets off the vehicle.
[0002]
[Prior art]
Conventionally, when an occupant gets out of a vehicle, there is an apparatus described in Patent Document 1, for example, as an apparatus that captures and displays the rear of a door.
[0003]
In this conventional apparatus, a photographing device for photographing the rear is provided for each door of the vehicle. When the vehicle occupant touches the door knob or releases the door lock, the conventional apparatus determines that the occupant gets out of the door. And the imaging device provided in the said door is operated, the back of a vehicle is image | photographed, and it displays on the monitor provided in the vehicle interior. Thereafter, when the passenger gets off and the door is closed, the conventional apparatus ends the above-described operation.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 7-274161
[Problems to be solved by the invention]
In the conventional apparatus, the rear of the vehicle is photographed by a photographing device provided at each door of the vehicle, and this is displayed on a monitor. However, in the conventional apparatus, since it is necessary to provide a photographing device at each door of the vehicle, the design structure is complicated. Also, in one-box cars and the like, there are slide-type and double-open types of rear seat doors. When a photographing device is provided in such a door, it is necessary to change the design structure of the photographing device in accordance with the opening / closing type of the door, which is not preferable in terms of design man-hours and costs.
[0006]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle rear display device capable of photographing and displaying the rear of the vehicle with a simple design structure.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, in the vehicle rear display device according to claim 1, photographing means for photographing the surroundings of the vehicle, display means for displaying an image photographed by the photographing means, and an operation for preparing a passenger to get off the vehicle When the vehicle occupant's getting-off preparation operation is detected by the detection means and the detection means, the photographing direction of the photographing means is changed so that the rear of the occupant is photographed with reference to the position of the door where the passenger gets off. And a control unit that causes the display unit to display an image captured by the imaging unit.
[0008]
As described above, the vehicle rear display device of the present invention includes the photographing means for photographing the surroundings of the vehicle. When the detection means detects the getting-off preparation operation of the vehicle occupant, the control means changes the photographing direction of the photographing means so as to photograph the rear of the occupant with reference to the position of the door where the occupant gets off. As a result, the rear of the vehicle can be photographed by changing the photographing direction of the photographing means, so that it is not necessary to provide a photographing device at each door of the vehicle, and the design structure is simplified. In addition, in one-box cars, etc., even if the rear seat door opening / closing type is sliding or double-opening, it is not necessary to change the design of the photographing means according to the door opening / closing type, design man-hours and costs, etc. It is preferable also from the restrictions.
[0009]
As described in claim 2, it is desirable that the photographing means is provided in the vicinity of the roof outside the passenger compartment of the vehicle. As a result, it is possible to easily and reliably photograph the rear of the vehicle simply by changing the photographing direction of the photographing means.
[0010]
According to a third aspect of the present invention, it is desirable that the detecting means detects a door unlocking operation or a door knob contact operation as a vehicle unloading preparation operation. When an occupant gets out of a vehicle, the occupant always performs a door unlocking operation or a contact operation with the door knob. By detecting these as preparation for getting off the vehicle occupant, the detection means can reliably detect that the occupant gets off the vehicle.
[0011]
According to a fourth aspect of the present invention, it is desirable that the display means be provided at a position where a passenger sitting on the rear seat of the vehicle can visually recognize. When an occupant gets off from the rear seat of the vehicle, it is difficult for the occupant to check the rear of the vehicle from the seating position. In particular, when the occupant is a child, it is difficult to confirm the rear of the vehicle from the physical characteristics. By providing the display means at a position where the passenger sitting on the rear seat of the vehicle can see, even if the passenger gets off the rear seat of the vehicle, the passenger can see the rear of the vehicle from the image displayed on the display means. You can get off while checking.
[0012]
According to a fifth aspect of the present invention, there is provided locking means for locking the door of the vehicle, and the control means determines whether another vehicle or a pedestrian is approaching the vehicle from the image taken by the photographing means. When it is determined that another vehicle or pedestrian is approaching, it is desirable to lock the vehicle door with respect to the locking means. Thereby, when another vehicle or a pedestrian is approaching, it is possible to prevent the occupant from opening the door or getting off the vehicle by mistake.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a block diagram showing the overall configuration of a vehicle rear display device according to an embodiment of the present invention. The vehicle rear display device of the present embodiment is configured by a getting-off detection sensor 1, a camera 2, displays A3 to D6, and an ECU 7, and is mounted on a vehicle having four doors to operate (see FIG. 2).
[0014]
The getting-off detection device 1 shown in FIG. 1 constantly monitors the door lock state of the doors A11 to D14 of the vehicle. And when the door lock of any door is cancelled | released, it will be judged that a passenger | crew gets off from the said door, and a getting-off start signal and the identification number of the said door are output to ECU7. Thereafter, when the door is closed, an exit signal is output to the ECU 7. The passenger getting off may be determined based on an AND condition that a transmission (not shown) of the vehicle is set in parking or a side brake (not shown) is pulled.
[0015]
The camera 2 that is an imaging unit is, for example, an omnidirectional CCD camera, and starts and ends shooting in accordance with a shooting start signal and a shooting end signal transmitted from the ECU 7. Image data of the photographed image is transmitted to the ECU 7. The camera 2 changes its shooting direction according to the drive signal acquired from the ECU 7. In particular, in the present embodiment, the camera 2 is disposed on the roof at the rear of the vehicle, and images the surroundings of the vehicle from above the vehicle (see FIG. 2). Note that an omnidirectional optical camera may be used for shooting around the vehicle.
[0016]
The displays A3 to D6, which are display means, are all small liquid crystal displays. The switches are turned on and off according to the display start signal and display end signal transmitted from the ECU 7, and the image of the image data also transmitted from the ECU 7 is displayed. indicate. In addition, display A3-D6 of this embodiment is each arrange | positioned around each seat of a vehicle. That is, the display A3 is arranged around the driver seat 21 and the display B4 is arranged around the passenger seat 22. The display C5 is arranged around the rear seat A23, and the display D6 is arranged around the rear seat B24. In addition, regarding image display, a vehicle-mounted head-up display may be prepared for each seat and displayed on a window of each door (not shown) of the vehicle.
[0017]
The ECU 7, which is a control means, transmits a drive signal to the camera 2 when obtaining the getting-off start signal and the door identification number from the getting-off detection device 1. Then, the shooting direction of the camera 2 is changed to the rear with reference to the position of the door corresponding to the identification number acquired from the getting-off detection device 1.
[0018]
Specifically, when the door corresponding to the acquired identification number is the driver's seat 21, the ECU 7 transmits a drive signal for changing the shooting direction of the camera 2 to the direction of the arrow in FIG. When the door corresponding to the acquired identification number is the passenger seat 22, the ECU 7 transmits a drive signal for changing the shooting direction of the camera 2 to the direction of the arrow in FIG.
[0019]
Similarly, when the door corresponding to the acquired identification number is the rear seat A23, the ECU 7 transmits a drive signal for changing the shooting direction of the camera 2 to the direction of the arrow in FIG. When the door corresponding to the acquired identification number is the rear seat B24, the ECU 7 transmits a drive signal for changing the shooting direction of the camera 2 to the direction of the arrow in FIG. 3 and FIG. 4 indicates an area photographed by the camera 2.
[0020]
Further, the ECU 7 transmits and starts a shooting start signal and a shooting end signal to the camera 2 to start and end shooting.
[0021]
Further, when the ECU 7 obtains the getting-off start signal and the door identification number from the getting-off detection device 1, the ECU 7 sends a display start signal to a display arranged around the seat closest to the door and turns on the display switch. To do. Then, the image data acquired from the camera 2 is transmitted to the display. Thereafter, when a getting-off end signal is acquired from the getting-off detection device 1, a display end signal is transmitted to the display described above, and the switch is turned off.
[0022]
FIG. 5 is a flowchart regarding processing for photographing and displaying the rear of the door where the passenger gets off in the vehicle rear display device of the present embodiment. The processing of this flowchart is executed at regular time intervals.
[0023]
In step 501, the ECU 7 determines whether any door lock of the doors A11 to D14 has been released. By determining whether or not the door lock is released, it is possible to reliably detect that the passenger gets out of the vehicle. If any one of the doors A11 to D14 is unlocked, the process proceeds to step 502. If not, the process ends.
[0024]
In step 502, the getting-off start signal and the identification number of the door whose door lock is released are obtained from the getting-off detection device 1. In step 503, a drive signal is transmitted to the camera 2 so as to change the photographing direction backward with reference to the position of the door corresponding to the identification number acquired in step 502. By providing the camera 2 on the roof outside the passenger compartment and transmitting a drive signal to change the shooting direction of the camera 2, it is possible to easily and reliably shoot the rear of each door.
[0025]
In step 504, a display start signal is transmitted to the display arranged around the seat closest to the door corresponding to the identification number acquired in step 502 among the displays A3 to D6. As a result, the display is turned on. In step 505, a shooting start signal is transmitted to the camera 2 to start shooting.
[0026]
In step 506, image data of an image taken by the camera 2 is acquired. In step 507, the image data acquired in step 506 is transmitted to the display turned on in step 504, and the image captured by the camera 2 is displayed on the display. Thus, even when the occupant gets off from the rear seat of the vehicle, the occupant can get off while confirming the rear of the door from the display image displayed on the display.
[0027]
In step 508, it is determined whether or not a getting-off end signal is received from the getting-off detection device 1, that is, whether or not the getting-off of the occupant is finished. If the stop signal is received, the process proceeds to step 509. If not, the process returns to step 506 and the above-described processing is repeated.
[0028]
In step 509, a shooting end signal is transmitted to the camera 2 to end shooting. In step 510, a display end signal is transmitted to the display turned on in step 504. As a result, the display is turned off and the image display ends.
[0029]
As described above, the vehicle rear display device of the present embodiment includes the camera 2 that captures the periphery of the vehicle. When the door lock of the door A11 to the door D14 of the vehicle is released, the ECU 7 transmits a drive signal to the camera 2 arranged on the roof at the rear of the vehicle, and the shooting direction of the camera 2 is determined based on the position of the door. Change to later. Thereby, it is not necessary to provide a photographing device at each door of the vehicle, and the design structure is simplified. Also, even if the opening / closing type of the rear seat door is a sliding type or a double opening type in a one-box car, etc., it is not necessary to change the design according to the opening / closing type of the door. Is also preferable.
[0030]
In the present embodiment, the passenger getting off the vehicle is determined by releasing the door lock. However, the passenger getting off may be determined by detecting a touch on the door knob. In the present embodiment, individual displays are arranged around the seats of the vehicle. However, a single large display may be provided on the roof in the passenger compartment. Thereby, the passenger | crew can get off, confirming the back of a door from the said display.
[0031]
Furthermore, a door lock device that automatically locks the door is provided for the vehicle rear display device of the present embodiment. When another vehicle or a pedestrian approaches from the rear of the door, the door is automatically opened. It may be locked. Thereby, it can prevent that a passenger | crew opens a door accidentally and alights.
[0032]
The above-described display can also be used for displaying images from a navigation device or other visual devices. In this case, when the ECU 7 detects the passenger getting off, the ECU 7 switches from the image displayed so far to an image obtained by photographing the state behind the vehicle.
[0033]
Further, in the above-described embodiment, when the passenger getting off is detected from the door lock release signal, the shooting direction of the camera is changed to face the rear of the door. However, when the left and right doors are unlocked at the same time, it is preferable to change the shooting direction of the camera so that the rear of the vehicle is shot in the center direction of the left and right doors. Thereby, the image which image | photographed the mode of the vehicle back simultaneously can be provided with respect to the passenger | crew who gets off from both right and left doors, reducing a blind spot as much as possible.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an overall configuration of a vehicle rear display device according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating a structure of a vehicle on which the vehicle rear display device of the present embodiment is mounted.
FIG. 3 is a diagram showing an area photographed by a camera when an occupant gets out of a driver seat and a passenger seat.
FIG. 4 is a diagram showing an area photographed by a camera when an occupant gets out of a rear seat A and a rear seat B;
FIG. 5 is a flowchart relating to processing for photographing and displaying the rear of a door where an occupant gets off in the vehicle rear display device of the present embodiment.
[Explanation of symbols]
1 ... Alighting detection device 2 ... Camera 3 ... Display A
4 ... Display B
5 ... Display C
6 ... Display D
7 ... ECU

Claims (5)

Photographing means for photographing the surroundings of the vehicle;
Display means for displaying an image taken by the photographing means;
Detecting means for detecting a getting-off preparation operation of an occupant of the vehicle;
When detecting that the vehicle occupant prepares to get off the vehicle by the detection unit, the shooting direction of the shooting unit is changed so that the rear of the vehicle is shot with reference to the position of the door where the passenger gets off, and A vehicle rear display device, comprising: a control unit that causes the display unit to display an image captured by the imaging unit. The vehicle rear display device according to claim 1, wherein the photographing unit is provided in the vicinity of a roof outside a passenger compartment of the vehicle. The vehicle rear display device according to claim 1, wherein the detection unit detects an unlocking operation of the door or a contact operation to the door knob as a getting-off preparation operation of an occupant of the vehicle. The vehicle rear display device according to claim 1, wherein the display means is provided at a position where an occupant seated on a rear seat of the vehicle is visible. Providing a locking means for locking the vehicle door;
The control means determines whether or not another vehicle or pedestrian is approaching the vehicle from an image taken by the photographing means, and when it is determined that another vehicle or pedestrian is approaching The vehicle rear display device according to claim 1, wherein the door of the vehicle is locked with respect to the locking means.

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