JPH01147983A - Display device for backward visual field of vehicle - Google Patents

Abstract

PURPOSE:To attain ease of setting up standard whether a steering wheel is further driven or driven back at present point of time by comparing a 1st and 2nd backward expected loci displayed on a monitor screen. CONSTITUTION:A signal from a camera 1 picking up the backward visual field of a vehicle and a signal representing the 1st and 2nd backward expected loci from a microcomputer 6 are given to a monitor television set 2 near the driver's seat via a superimposing device 6 and the backward visual field and the backward expected loci are displayed superimposingly on a monitor screen 2a of the television set 2. The microcomputer 5 is provided with a CPU 5a and a ROM 5b and a display data of backward loci corresponding to each steering angle detailed in the unit of angle is given to the ROM 5b and the display data corresponding to the detected steering angle of the steering angle sensor 3 at the backward drive is read and it is outputted as the display data of the 1st backward expected locus. Moreover, a signal from a changeover switch 7 selects display data corresponding to zero or maximum steering angle to form the 2nd backward expected locus display data.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rear view display device for a vehicle that displays a rear view photographed by a camera on a monitor screen near the driver's seat.

(Prior Art) Conventionally, as this type of display device, Japanese Patent Application Laid-Open No. 59-11413
No. 9 discloses a vehicle in which a predicted reverse trajectory corresponding to a steering angle detected by a steering angle sensor is displayed in a superimposed manner on a monitor screen.

(Problem to be Solved by the Invention) With the above, it is possible to know the backward trajectory when the steering wheel is left as it is at the current time from the predicted trajectory displayed on the monitor screen, but for an inexperienced driver, It is difficult to predict the backward trajectory on the monitor screen when the steering wheel is turned further or back from the start, and the timing of turning back is delayed, resulting in having to go backwards again after moving forward, or when the steering wheel is turned back. Sometimes it is difficult to decide whether to cut further.

An object of the present invention is to provide a display device that allows even such inexperienced drivers to perform appropriate steering operations.

(Means for Solving the Problems) In order to achieve the above object, the present invention is a device that displays a rear view photographed by a camera on a monitor screen near the driver's seat, and includes a steering wheel detected by a steering angle sensor. The first corresponding to the corner
The apparatus includes a first trajectory display means for superimposing an expected reverse trajectory on the monitor screen, and a second trajectory display means for superimposing a second predicted reverse trajectory corresponding to a preset predetermined steering angle on the monitor screen. It is characterized by providing a trajectory display means.

(Function) On the monitor screen, in addition to the rear view, the first predicted reverse trajectory corresponding to the current rudder angle and the second predicted trajectory corresponding to the predetermined rudder angle are superimposed and displayed, and when the predetermined rudder angle is For example, if the value is set to zero, when the second predicted trajectory points towards the target point, the vehicle will be directed back to the target point so that the first predicted trajectory overlaps the second predicted trajectory. You can retreat straight to the point.

Furthermore, by setting a predetermined steering angle value to the maximum steering angle, it is possible to easily determine whether or not it is okay to turn the steering wheel further based on the positional relationship between the second expected trajectory and obstacles within the rear field of view. .

(Example) Referring to FIG. 1, (1) is a camera that photographs the rear view of the vehicle, (2) is a monitor television installed near the driver's seat, (
3) shows a steering angle sensor linked to the steering wheel (4), and a monitor TV (2) receives signals from the camera (1) and the first and second signals from the microcomputer (5), which will be described later, as shown in the second figure. A signal representing the predicted reverse trajectory of the vehicle 2 is manually inputted via superimposition (6), and the rear view and these predicted reverse trajectory are superimposed and displayed on the monitor screen (2a) of the television (2).

The microcomputer (5) has CPU (5a) and R
OM (5b), display data of the backward trajectory corresponding to each rudder angle subdivided by unit angle is input into the ROM (5b), and the display data of the backward trajectory corresponding to each rudder angle subdivided by unit angle is inputted to the ROM (5b). The CPU (5a) successively outputs display data corresponding to the detected steering angle of the sensor (3), and outputs this as display data of the first predicted reverse trajectory. Selectively read either the display data corresponding to when the value of the rudder angle is zero at the signal or the display data corresponding to the maximum rudder angle, and output this as the display data of the second predicted reverse trajectory. I tried to get it. In this case, when the maximum steering angle is selected with the changeover switch (7),
The display data corresponding to the maximum rudder angle in the same direction as the direction of the rudder angle detected by the rudder angle sensor (3) is automatically selected and outputted, and the switch (7) is switched to the OFF position. The display of the second expected reverse trajectory can now be erased as appropriate.

Although it may be possible to select which trajectory corresponds to the maximum steering angle on the left or right side to be displayed using the changeover switch (7), it is preferable to select the trajectory corresponding to the maximum steering angle as the second predicted reverse trajectory. This is when comparing the first and second predicted reverse trajectories to determine whether or not to turn the steering wheel further, and displays the trajectory corresponding to the maximum rudder angle in the opposite direction to the current rudder angle direction. is almost never necessary, and it is advantageous to automatically select the direction of the maximum steering angle as described above because switch operation becomes easier.

When vehicle A shown in FIG. 4 equipped with the device of the present invention is placed in a parking space between two vehicles B and C, when vehicle A reaches the position indicated by the solid line, the monitor screen (2a) A display as shown in the third figure is displayed. In the figure, X is the first predicted reverse trajectory, Y is the second predicted reverse trajectory corresponding to when the steering angle value is zero, and if the steering wheel is turned back at this point from the latter trajectory Y, the two cars It is understood that vehicle A can be inserted straight between vehicles B and C, and it is possible to avoid retreating into the state shown by the imaginary line in FIG. 4 due to a delay in the timing of turning back.

In addition, in order to check the positional relationship of the vehicle with respect to the rear visibility from the monitor screen (2a), the rear end A' of the vehicle can be viewed from the camera.
1) and display this on the monitor screen (2a) together with the rear view.

(Effects of the Invention) As described above (according to the present invention), by comparing the first and second predicted reverse trajectories displayed on the monitor screen, it is possible to determine whether the steering wheel should be turned further or back at the current moment. This has the effect that even an inexperienced driver can properly operate the steering wheel when reversing.

[Brief explanation of the drawing]

Fig. 1 is a ring route map of a vehicle equipped with the device of the present invention, Fig. 2 is a block diagram showing an example of the circuit configuration of the device of the present invention, Fig. 3 is a line diagram showing the display contents of the monitor screen, and Fig. 4 is a diagram showing a circuit configuration of the device of the present invention.
The figure is an explanatory diagram showing a backward traveling state of the vehicle. (1)...Camera (2a)...Monitor screen (3)...Rudder angle sensor (5)...Microcomputer (first and second trajectory display means) (7)...Switching 2 people other than the switch (switching means)

Claims (1)

[Scope of Claims] 1. A device for displaying a rear view taken by a camera on a monitor screen near the driver's seat, the device displaying on the monitor a first expected reverse trajectory corresponding to a steering angle detected by a steering angle sensor. In the device comprising a first trajectory display means for superimposing display on the screen, a second trajectory display means for superimposing display on the monitor screen a second predicted reverse trajectory corresponding to a predetermined steering angle set in advance is provided. A vehicle rear visibility display device featuring: 2. The rear visibility display device for a vehicle according to claim 1, wherein the value of the predetermined steering angle is zero. 3. The rear visibility display device for a vehicle according to claim 1, wherein the value of the predetermined steering angle is a maximum steering angle. 4. The vehicle according to claim 1, wherein the second trajectory display means includes a switching means that can arbitrarily switch the value of the predetermined steering angle between zero and a maximum steering angle. rear view display device. 5. The rear of the vehicle according to claim 3 or 4, wherein the direction of the maximum steering angle is set to the same direction as the direction of the steering angle detected by the steering angle sensor. Visibility display device.