JP2010006129A - Vehicle rear information display and vehicle rear information display method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle rear information display for safely driving a vehicle particularly when performing parallel parking, and reducing system construction cost more than when arranging a plurality of cameras, by improving visibility in the oblique rear of the vehicle which is a blind spot for a vehicle driver. <P>SOLUTION: This vehicle rear information display includes an image information display means arranged in a visual field range in front of the vehicle driver, an imaging means for imaging an image of the vehicle rear incident via a wide angle lens, a retreat detecting means for detecting a retreat of the vehicle, and a turning detecting means for detecting the turning direction of the vehicle, and also includes a control means for displaying the image of the vehicle rear on the image information display means when acquiring a signal from the retreat detecting means and displaying animage of a visibility requiring part of the vehicle rear on the image information display means when inputting a signal from the turning detecting means. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle rear information display device and a vehicle rear information display method that enable a vehicle rear to be visually recognized by a monitor image.

  In general, when driving vehicles such as passenger cars, buses, trucks, etc., it is known as an existing means to attach a camera to the vehicle body to ensure safety, take images outside the vehicle and check the monitor image in the cab. It has been. And since the range out of the vehicle driver's field of view is the rear and rear of both sides, a plurality of images in this direction are captured, and an arbitrary monitor image can be confirmed by switch operation is proposed. (See Patent Document 1).

In the case of the vehicle periphery confirmation assisting device disclosed in Patent Document 1, a rear camera, a passenger side rear camera, and a driver side rear camera are provided, and the outside of the vehicle is imaged from a total of five locations. Then, an image captured from the camera is displayed on a display built in the rearview mirror, and the selection of the image is based on a switch operation of the vehicle driver.
JP 2005-145151 A

  In the case of the above device, since there are a plurality of images that can be displayed, there are a plurality of buttons on a switch for selecting the images, and the vehicle driver needs to store the correspondence between these buttons and external images. . And if it is driving | running | working, the vehicle driver must operate the button for displaying the image requested | required, without confirming the position of the button of a switch.

  By the way, even when a plurality of cameras are arranged in the vehicle as described above, the most important image is the rear of the vehicle, and particularly when performing parallel parking, an image of the oblique rear of the vehicle is important. However, since the image in the conventional apparatus as described above is a fixed image capturing only one direction, the imaging direction is determined by the direction of the vehicle, and the vehicle driver's sufficient image is obtained by accurately capturing an oblique rearward direction. Visibility was not ensured.

  The present invention has been made in order to solve such a conventional problem, and in particular, when a vehicle is moved backward in the case of parallel parking, it is possible to sufficiently perform visual recognition by an image behind the vehicle diagonally. Thus, the vehicle driving safety is improved.

  Therefore, the present invention solves the above problems by means described below. That is, according to the first aspect of the present invention, the image information display means provided in the visual field range in front of the vehicle driver, the image pickup means for picking up the image of the rear of the vehicle incident through the wide-angle lens, and the reverse of the vehicle are detected And a turn detection means for detecting the turning direction of the vehicle, and further, when a signal from the reverse detection means is input, displays an image behind the vehicle on the image information display means, and When a signal from the turning detection means is input, the vehicle rear information display device is provided with a control means for displaying an image of the main visual recognition part behind the vehicle on the image information display means.

  According to a second aspect of the present invention, in the vehicle rear information display device according to the first aspect, image information is generated by correcting barrel distortion of an image incident from a wide-angle lens.

  According to a third aspect of the present invention, in the vehicle rear information display device according to the first aspect, the steering wheel steering angle is determined based on a signal output from the turning detection means, and the display area is determined according to the steering wheel steering angle.

  According to the fourth aspect of the present invention, an image of the rear of the vehicle is displayed on the image display means based on a signal output when the reverse detection means for detecting the reverse of the vehicle detects the reverse of the vehicle. When the vehicle is turned, a vehicle rear information display method for enlarging and displaying a main part of the visual recognition at the rear of the vehicle according to the steering angle of the steering wheel is provided.

  According to the present invention, the wide-angle lens can capture a wide range of the rear of the vehicle, and when the vehicle is moving backward, the barrel-shaped distortion of the image by the wide-angle lens is corrected and only the main visual recognition part behind the vehicle is enlarged and displayed. As a result, the visibility behind the vehicle in the blind spot is improved, and the vehicle can be driven safely, especially when performing parallel parking, and the cost of system construction is reduced compared to the case where multiple cameras are installed. can do.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiments, description will be made based on an example of normal boarding, but the present invention is not limited to this, and can be applied to all vehicles that require rearward confirmation such as buses and trucks.

  FIG. 1 is a diagram for explaining an implementation state of a vehicle rear information display device according to the present invention. As shown in FIG. 1, the rear camera is positioned at a position such as the rear end of the roof of the vehicle A and overlooking the vehicle rear. 1 is disposed. The rear camera 1 is equipped with a wide-angle lens 1 a so that the imaging range is widened so that the left and right oblique rear sides of the vehicle A are included, and the obtained image signal is input to the control unit 2.

  Reference numeral 3 denotes a reverse detection means for detecting the reverse of the vehicle A. Actually, when the gear position of the speed change lever S is in the reverse (R), a signal from a switch that responds to this is a control unit 2. To input. Reference numeral 4 denotes a turning detection means for detecting the turning direction of the vehicle A. In practice, a steering angle sensor is attached so as to respond to the steering, and a signal corresponding to the steering angle of the steering wheel H in the left-right direction is controlled. Input to part 2.

  Reference numeral 5 denotes a rearview mirror in which a liquid crystal display device 6 serving as image information display means is disposed. As shown in FIG. 2, a half mirror 5a is disposed on the front surface of the rearview mirror 5, and this half mirror 5a. A liquid crystal display device 6 is disposed on the back of the side portion. The image information display means may use a monitor of a car navigation system, a center display, or the like, but in this embodiment, description will be made based on an example using the rearview mirror 5.

  The liquid crystal display device 6 is connected to the control unit 2 and is configured by superposing the liquid crystal panel 6a and the backlight 6b as shown in FIG. 3, and when the backlight 6b is turned off, the liquid crystal display device 6 is half-lit. When the background behind the passenger compartment is reflected on the entire mirror surface, the backlight 6b is turned on, and the image signal captured from the rear camera 1 is input to the liquid crystal panel 6a, an image based on the image signal is displayed.

  In the above description, signals are exchanged between the control unit 2 and the rear camera 1, the backward detection means 3, the turning detection means 4, and the image display means 5. Alternatively, it may be constructed by a CAN (Controller Area Network) communication system.

  Next, an aspect of an image displayed on the liquid crystal display device 6 will be described. When the vehicle driver operates the shift lever S and the gear position is in the reverse (R) position, a signal is input from the reverse detection means 3 to the control unit 2 and the image data captured from the rear camera 1 is input to the liquid crystal display device 6. Is output. At this time, since the handle H is not steered, the image displayed on the liquid crystal display device 6 has a barrel shape in which the center swells up and down as shown in FIG.

  All the image information captured by the rear camera 1 is displayed at this time, and a lot of image information unnecessary for confirming the backward direction of the vehicle A is included. For example, when performing parallel parking so that the left side is parallel to the road shoulder while the vehicle A is moved backward, the image of the vehicle A diagonally rearward to the left is important, and the video of the vehicle diagonally rearward to the right is not necessary.

  However, when all the image information is displayed, the required image on the left rear side becomes small, and when displayed in a barrel shape, the image is displayed in a contracted state and is difficult to visually recognize. Therefore, in the present invention, when the steering wheel H is turned from the above state, the essential part of the visual display displayed on the liquid crystal display device 6, that is, the left oblique rear image in the above state, according to the steering angle of the steering wheel H by retouching software or the like. The barrel distortion (distortion aberration) is corrected and the main part of the visual recognition is enlarged so as to be displayed on the liquid crystal display device 6.

  FIG. 5 illustrates a specific situation of an image displayed on the liquid crystal display device 6 in response to the turning of the handle H. FIG. 5A illustrates a state in which the turning of the handle H is not started. As described above, the liquid crystal display device 6 displays all backgrounds in a barrel shape. When the steering wheel H is turned leftward (counterclockwise) from this state, a signal corresponding to the degree of turning of the steering wheel H is output from the steering angle sensor of the turning detection means 4 to the control unit 2.

  When the signal from the turning detection means 4 is input, the control unit 2 scrolls the image displayed on the liquid crystal display device 6 according to the degree of rotation of the handle H in the horizontal direction as shown in FIG. . As a result, the display area of the image is biased to the left as shown in the figure, and the unnecessary right image is erased from the screen.

  When the turning of the vehicle A reaches the final position in this way, the image displayed on the liquid crystal display device 6 as shown in FIG. 5C is in a state in which only the diagonally left rear is enlarged as shown in FIG. It becomes. At this time, since the retouching software of the control unit 2 is activated, an image enlarged by correcting the barrel distortion is displayed.

  In the above image processing, the barrel distortion correction and the image enlargement are performed by setting the display region based on the resolution of the liquid crystal display device 6. For example, the number of pixels in the enlarged portion is increased, and pixel interpolation is performed. This can be dealt with by a general image processing technique. By performing image processing in this way, the image displayed on the liquid crystal display device 6 is enlarged and becomes an image without distortion, so that the visibility is improved.

  According to the present invention, since only the main visual recognition part behind the vehicle can be displayed as the steering wheel turns, the vehicle driver can concentrate on driving without being distracted by unnecessary image information. . In addition, since it is not necessary to install a plurality of cameras, the cost of system construction can be reduced, and the apparatus can be made economical.

It is a figure explaining the implementation state of the vehicle back information display apparatus of this invention. It is a figure which shows the example of the image information display means using a back mirror. It is sectional drawing of the rear-view mirror of FIG. It is a figure which shows the example of the image displayed on an image information display means. It is a figure explaining the aspect of the image processing by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 .... Rear camera 1a ... Wide angle lens 2 .... Control part 3 .... Reverse detection means 4 .... Turn detection means 5 ... ... Image information display means 6 .... Liquid crystal display 6a ... Liquid crystal panel 6b ... Backlight A ... Vehicle H ... Handle S .... Shift lever

Claims (4)

Image information display means provided in the field of view in front of the vehicle driver;
An imaging means for imaging an image of the rear of the vehicle incident through the wide-angle lens;
Reverse detection means for detecting the reverse of the vehicle;
Turning detection means for detecting the turning direction of the vehicle,
Further, when a signal from the reverse detection means is input, an image of the rear of the vehicle is displayed on the image information display means, and when a signal from the turning detection means is input, an image of a main visual recognition part behind the vehicle is displayed. A vehicle rear information display device comprising control means for displaying on the image information display means.   The vehicle rear information display device according to claim 1, wherein image information is generated by correcting barrel distortion of an image incident from the wide angle lens.   2. The vehicle rear information display device according to claim 1, wherein a steering angle is determined from a signal output from the turning detection means, and a display area is determined according to the steering angle. Based on the signal output when the reverse detection means for detecting the reverse of the vehicle detects the reverse of the vehicle, an image of the rear of the vehicle is displayed on the image display means,
A vehicle rear information display method characterized in that, when the vehicle is turned while reversing the vehicle, an essential part of visual recognition behind the vehicle is enlarged according to the steering angle of the steering wheel.

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