JP2023010075A - Vehicle monitor display method and vehicle monitor display device - Google Patents

Abstract

To provide a vehicle monitor display method and a vehicle monitor display device that make it easy to see a monitor screen to be divisionally displayed during low-speed running.SOLUTION: According to a display method, when a traveling speed V of a vehicle 11 is less than a preset speed V1, a monitor screen is divided into two left and right screens, and one screen ML of the two screens displays the own vehicle 11 and a surrounding image of the own vehicle 11 while the other screen MR displays an image of the rear side of the own vehicle 11, and when the traveling speed of the own vehicle 11 is equal to or higher than a preset predetermined speed V1, the monitor screen is set as one screen, and displays an image of the rear side of the own vehicle 11. When the traveling speed V of the vehicle 11 is less than a preset predetermined speed V1, a stream direction R of the surrounding image of the own vehicle 11 displayed on the one screen ML is set to a downward direction, and a stream direction R of the rear side image of the own vehicle 11 displayed on the other screen MR is also set to a downward direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vehicle monitor display method and a vehicle monitor display device.

At present, for safe driving, cameras are installed in four directions, front, rear, left, and right, and the image of each camera is corrected to display a bird's-eye view image on the in-vehicle monitor as if the image is viewed from all directions from the top of the vehicle. method is being adopted.

For example, in FIG. 5, the left screen ML of the monitor M is a bird's-eye view image, and 10 is the own vehicle.
In FIG. 5, the right screen MR is an image showing the front of the own vehicle, and 21 indicates another vehicle running in front of the own vehicle 10 .

At present, even in the case of trucks, there is an increasing demand for checking and recording bird's-eye view images in all directions of the own vehicle while driving at low speeds (running in towns, garages, or during work).

For example, in FIG. 6, the left screen ML of the monitor M is a bird's-eye view image, and 11 is the own vehicle (truck).
In FIG. 6, the right screen MR is an image showing the rear of the own vehicle 11, and 22 indicates another vehicle running behind the own vehicle 11. As shown in FIG.

In FIGS. 5 and 6, arrow F indicates the traveling direction of the vehicle within the monitor M, and arrow R indicates the direction of flow of the surrounding image of the vehicle within the monitor M. As shown in FIG.

In FIG. 5, in the bird's-eye view image on the left screen ML of the monitor M, the surrounding image of the own vehicle 10 flows from the top to the bottom of the monitor as indicated by an arrow R.
Also, in the bird's-eye view image on the left screen ML of the monitor M (FIG. 6) during low-speed running, the surrounding image of the own vehicle flows from the top to the bottom of the monitor as indicated by the arrow R.

On the other hand, FIG. 7 shows an image showing the rear of the host vehicle (13) on the full screen of the monitor M during normal (other than low speed) running. This is an image captured by a so-called back-eye camera.
In FIG. 7, 13 is the rear part of the own vehicle, 23 is the following vehicle, 24 is the oncoming vehicle, G is the guardrail, L is the road, and C is the center line.

As shown in FIG. 7, the rear image of the own vehicle by the back-eye camera flows from the bottom to the top of the monitor as indicated by an arrow R. As shown in FIG.
In order to make the monitor image by the back-eye camera look the same as the image projected on the rear-view mirror, the image captured by the back-eye camera is stored in the control box as the control means of the monitor system. The left and right are reversed by the processing program and displayed.

At present, the image shown in FIG. 7 is considered correct as the monitor image by the back-eye camera. This is because, as described above, it is desirable that the monitor image by the rear-eye camera looks the same as the image projected on the rear-view mirror.

Also, currently, the monitor screen is automatically switched between two screens or one screen depending on the vehicle speed of the own vehicle.
For example, when driving at low speed (0 km/h to 20 km/h), left and right screens are displayed as shown in Fig. 6, and when driving at normal speed (20 km/h or more), a single screen is displayed by the back-eye camera as shown in Fig. 7. is being done.

At present, as described above, the monitor image from the back-eye camera is considered correct when the rearward image flows from the bottom to the top of the monitor as indicated by the arrow R, as shown in FIG. 6, when the vehicle is running at low speed, the rearward image (MR) when the left and right two screens are displayed also flows upward as indicated by an arrow R from the bottom of the monitor.

Therefore, when traveling at low speed (FIG. 6), the flow direction (from top to bottom) R of the surrounding image on the left screen ML displaying the bird's-eye view image and the flow direction (from top to bottom) of the surrounding image on the right screen MR displaying the rear image ( bottom to top) R is reversed. Therefore, there is a problem that the driver feels a sense of incongruity and it is difficult to see the monitor screen.

For example, Patent Literature 1 discloses a technique for displaying a monitor screen in a left-right split manner, but does not describe the above-described problem.

Japanese Patent Application Laid-Open No. 2002-204446

A problem to be solved by the present invention is to provide a vehicle monitor display method and a vehicle monitor display device that make it easier to see a monitor screen that is divided and displayed during low-speed running.

In order to solve the above problems, the vehicle monitor display method of the present invention includes:
On the monitor installed in the driver's cab of the vehicle,
When the running speed of the vehicle is less than a predetermined speed, the monitor screen is divided into two, left and right, and one screen displays the image of the vehicle and the surroundings of the vehicle, and the other screen displays the image behind the vehicle. show the video,
When the running speed of the vehicle is equal to or higher than the predetermined speed set in advance, a display method for projecting an image behind the own vehicle using a monitor screen as one screen, comprising:
When the traveling speed of the vehicle is less than the predetermined speed set in advance, the flow direction of the surrounding image of the own vehicle displayed on the one screen is made downward, and the rearward image of the own vehicle displayed on the other screen. The flow direction of the image is also directed downward.

According to this vehicle monitor display method,
When the traveling speed of the vehicle is less than the preset predetermined speed, the flow direction of the surrounding image of the vehicle displayed on the one screen and the flow direction of the rear image of the vehicle displayed on the other screen are different. , , and so on, the sense of incongruity that the driver has conventionally felt is eliminated, and the monitor screen becomes easier to see.

Further, in order to solve the above problems, the vehicle monitor display device of the present invention includes:
a plurality of cameras mounted on the vehicle;
a monitor provided in the driver's cab of the vehicle;
speed detection means for detecting the running speed of the vehicle;
Based on the traveling speed from the speed detection means and a plurality of captured images from the plurality of cameras,
When the running speed of the vehicle is less than a preset speed, the monitor screen is divided into two left and right screens, one of which displays the image of the vehicle and the surroundings of the vehicle, and the other of which displays the image of the vehicle. showing the rear image,
A device comprising control means for projecting a rearward image of the vehicle on a single monitor screen when the running speed of the vehicle is equal to or higher than the preset predetermined speed,
When the running speed of the vehicle is less than the preset predetermined speed, the control means causes the flow direction of the surrounding image of the own vehicle displayed on the one screen to be downward and displayed on the other screen. It is characterized in that the flow direction of the rearward image of the own vehicle is also projected downward.

According to this vehicle monitor display device,
When the traveling speed of the vehicle is less than the preset predetermined speed, the flow direction of the surrounding image of the vehicle displayed on the one screen and the flow direction of the rear image of the vehicle displayed on the other screen are different. , , and so on, the sense of incongruity that the driver has conventionally felt is eliminated, and the monitor screen becomes easier to see.

Explanatory drawing of the vehicle monitor display method which concerns on this invention. 1 is a block diagram of an embodiment of a vehicle monitor display device according to the present invention; FIG. Connection diagram as well. Flowchart as well. Explanatory drawing of a prior art. Explanatory drawing of a prior art. Explanatory drawing of a prior art.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a vehicle monitor display method or a vehicle monitor display device according to the present invention will be described below with reference to the drawings. In each figure, the same reference numerals are given to the same or corresponding parts.

The vehicle monitor display method of this embodiment includes:
On the monitor M installed in the driver's cab of the vehicle,
When the traveling speed V of the vehicle is less than a preset speed V1, the monitor screen is divided into two, left and right, and one of the screens ML displays the image of the vehicle and its surroundings, and the other screen MR. Project the rear image of your vehicle,
When the traveling speed of the own vehicle is equal to or higher than the predetermined speed V1 set in advance, a display method for projecting an image behind the own vehicle 11 on a monitor screen as shown in FIG. 7, for example,
When the traveling speed V of the vehicle is less than the preset speed V1, for example, as shown in FIG. In addition, the flow direction R of the rear image of the own vehicle 11 displayed on the other screen MR is also downward.

According to this vehicle monitor display method,
When the traveling speed V of the vehicle is less than the preset predetermined speed V1, the flow direction R of the surrounding image of the own vehicle 11 displayed on the one screen ML and the flow direction R of the image of the own vehicle 11 displayed on the other screen MR. Since the flow direction R of the rearward image is both downward, the sense of incompatibility that the driver has conventionally felt is eliminated, and the monitor screen becomes easier to see.

In the present application, the term "rear image" refers only to an image in which only the image behind the own vehicle is displayed with little (or no) image of the own vehicle 11, as shown in FIG. In addition, as shown in the right screen MR of FIG. 1, for example, the image includes the surrounding image of the own vehicle 11 and the image of the rear of the own vehicle 11 is also included.

The vehicle monitor display method as described above can be implemented, for example, by the vehicle monitor display device of the embodiment described below.
As shown in FIGS. 2 to 4 (mainly FIG. 2), the vehicle monitor display device 30 of this embodiment includes:
a plurality of cameras C1 to C4 mounted on a vehicle 11 (see FIG. 1);
a monitor M provided in the driver's cab of the vehicle 11;
a speed detection means 31 for detecting the traveling speed V of the vehicle 11;
Based on the running speed V from the speed detection means 31 and the plurality of captured images from the plurality of cameras C1 to C4,
When the traveling speed V of the vehicle 11 is less than a predetermined speed V1 set in advance, the monitor screen (M) is divided into two on the left and right, and the own vehicle 11 and the surrounding image of the own vehicle 11 are displayed on one of the screens ML. At the same time, the rear image of the own vehicle 11 is displayed on the other screen MR (see FIG. 1),
When the traveling speed V of the vehicle 11 is equal to or higher than the preset speed V1, the device is provided with a control means 40 for projecting an image behind the own vehicle 11 using the monitor M screen as one screen as shown in FIG. There is
When the running speed V of the vehicle 11 is less than the preset speed V1, the control means 40 controls the flow direction R of the surrounding image of the own vehicle 11 displayed on the one screen ML as shown in FIG. is directed downward, and the flow direction R of the rearward image of the own vehicle 11 projected on the other screen MR is also directed downward.

According to this vehicle monitor display device 30,
When the running speed V of the vehicle 11 is less than the preset predetermined speed V1, the flow direction R of the surrounding image of the vehicle 11 displayed on the one screen ML and the vehicle 11 displayed on the other screen MR. Since the flow direction R of the rear image is downward, the driver's conventional sense of incongruity is eliminated, and the monitor screen (M) becomes easier to see.

The plurality of cameras C1 to C4 mounted on the vehicle 11 can be composed of known cameras. In this embodiment, C1 is a front camera that captures the front of the vehicle, C2 is a rear camera that captures the rear of the vehicle, C3 is a left side camera that captures the left side of the vehicle, and C4 is a right side camera that captures the right side of the vehicle.

The monitor M provided in the driver's cab of the vehicle 11 can be composed of a known liquid crystal monitor capable of displaying two screens.

The speed detection means 31 for detecting the running speed V of the vehicle 11 can be composed of a known speed sensor mounted on the vehicle. The speed detection means may also consist of information obtained from the GPS antenna (see FIG. 3) and the control means 40 .

The control means 40 can be composed of an ECU (Electronic Control Unit) box (control box).

As shown in FIG. 2, the ECU box 40 includes a "video encoder" that converts analog video data from the cameras C1 to C4 into digital video data, and converts the data from the "video encoder" to A "SoC" (system on a chip) performs image processing according to the above (details will be described later with reference to FIG. 4), and the digital video data from this "SoC" is converted into analog video data to be displayed on the monitor M , a "power supply block", an "eMMC" (embedded MultiMediaCard), and a "DDR" (Double Data Rate).

The "SoC" includes a "capture module" that captures digital video data from the "video encoder", a reverse signal (a signal that the vehicle moves backward) according to the position of the shift lever of the vehicle, and a speed signal from the speed detection means 31, for example. It is equipped with an "external signal analyzer" for inputting a signal (V), a "digital signal processing module" and a "display module", and operates as follows.

FIG. 4 is a flow chart showing the operation of the "SoC".

(1)
For example, when the starter switch of the vehicle is turned on, the vehicle monitor display device 30 is turned on in step ST1.

(2)
At step ST2, it is determined whether or not a back (vehicle backward) signal is input.

(3)
If it is determined in step ST2 that the reverse signal is input, the "rear camera image display mode" is selected in step ST3, and an image (not shown) during normal reverse movement is displayed on the monitor M. This "rear camera image display mode" is continued until it is determined in step ST2 that no back signal is input.

(4)
If it is determined in step ST2 that the reverse signal has not been input, in step ST4 it is determined whether or not the running speed V of the vehicle 11 is less than a predetermined speed V1 (for example, 20 km/h). .

(5)
When it is determined in step ST4 that the running speed V of the vehicle 11 is less than the preset speed V1, the "dual screen display mode" is selected in step ST5, for example, as shown in FIG. , the monitor screen (M) is divided into left and right halves, one of the screens ML displays the vehicle 11 and the surrounding image of the vehicle 11, and the other screen MR displays the rear image of the vehicle 11. At this time, by vertically inverting the image data displayed on the other screen MR in the conventional system by the image processing program built in the control box 40, the flow direction of the rearward image of the own vehicle 11 displayed on the other screen MR is changed. Point R down. In other words, in the conventional system, the video data displayed on the other screen MR is only horizontally reversed by the image processing program built in the control box 40. The flow direction R of the rear image of the own vehicle 11 projected on the screen MR of 1 is set downward.
As a result, as shown in FIG. 1, the flow direction R of the surrounding image of the vehicle 11 displayed on the one screen ML is set downward, and the flow direction of the rear image of the vehicle 11 displayed on the other screen MR. R can also be projected downward.
This "dual-screen display mode" is maintained until it is determined in step ST2 that a reverse signal has been input, or until it is determined in step ST4 that the running speed V of the vehicle 11 is not less than the preset predetermined speed V1. continues until

(6)
If it is determined in step ST4 that the traveling speed V of the vehicle 11 is not less than the predetermined speed V1 set in advance, the "single-screen display mode" is selected in step ST6, for example, as shown in FIG. , the rearward image of the own vehicle 11 is displayed using the monitor M screen as one screen.
This "single-screen display mode" is maintained until it is determined in step ST2 that a reverse signal has been input, or until it is determined in step ST4 that the running speed V of the vehicle 11 is less than the preset predetermined speed V1. continues until

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be appropriately modified within the scope of the gist of the present invention.
For example, in the above embodiment, the preset predetermined speed V1 is set to 20 km/h, but it can be appropriately set according to the use conditions of this device.

11: Vehicle 11
31: speed detection means 31;
40: Control means C1 to C4: Camera M: Monitor

Claims (2)

On the monitor (M) provided in the driver's cab of the vehicle (11),
When the running speed (V) of the vehicle is less than a predetermined speed (V1) set in advance, the monitor screen is divided into left and right, and one of the screens (ML) is divided into the host vehicle (11) and the host vehicle (11). and display the rear image of the own vehicle (11) on the other screen (MR),
A display method for projecting an image behind the own vehicle (11) using a monitor screen as one screen when the running speed of the own vehicle (11) is equal to or higher than the predetermined speed (V1) set in advance,
Flow direction (R) of surrounding image of the own vehicle (11) displayed on the one screen (ML) when the running speed (V) of the vehicle (11) is less than the predetermined speed (V1) set in advance. is directed downward, and the flow direction (R) of the rear image of the own vehicle (11) displayed on the other screen (MR) is also directed downward. a plurality of cameras (C1 to C4) mounted on a vehicle (11);
a monitor (M) provided in the cab of the vehicle (11);
speed detection means (31) for detecting the running speed (V) of the vehicle (11);
Based on the running speed (V) from the speed detection means (31) and a plurality of captured images from the plurality of cameras (C1 to C4),
When the running speed (V) of the vehicle (11) is less than a predetermined speed (V1) set in advance, the monitor screen (M) is divided into left and right, and one screen (ML) ) and an image of the surroundings of the own vehicle (11), and an image of the rear of the own vehicle (11) is displayed on the other screen (MR),
When the traveling speed (V) of the vehicle (11) is equal to or higher than the predetermined speed (V1) set in advance, a control means (40) for projecting a rearward image of the own vehicle (11) using the monitor screen (M) as one screen. ), wherein
The control means (40) controls the vehicle (11) to be displayed on the one screen (ML) when the traveling speed (V) of the vehicle (11) is less than the predetermined speed (V1) set in advance. A vehicle characterized in that the flow direction (R) of surrounding images is directed downward, and the flow direction (R) of the rearward image of the own vehicle (11) displayed on the other screen (MR) is also directed downward. monitor display.

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