JP7414175B1 - Driving support device - Google Patents

Abstract

[Problem] To suppress the difference between a change in the size of an object moving in the optical axis direction directly viewed by a driver and a change in the size of an object moving in the optical axis direction displayed on a display device. . A driving support device includes: a plane mirror having a mirror surface that reflects a blind spot area outside a vehicle; an imaging device that captures a mirror image of the blind spot area reflected on the mirror surface; and an image of the mirror image captured by the imaging device. a display unit that displays the image pickup device, and the distance between the imaging device and the mirror surface is equal to the distance between the driver's viewpoint position and the mirror surface. [Selection diagram] Figure 2

Description

The present disclosure relates to a driving support device that supports driving by a driver of an automobile.

2. Description of the Related Art Conventionally, in order to reduce blind spots caused by pillars of automobiles, driving support devices are known that display scenery in the blind spot area inside the vehicle to assist the driver of the automobile in driving. Such driving support devices include systems that consist only of optical elements such as lenses or mirrors (hereinafter referred to as "optical systems"), and systems that combine an imaging device such as a camera with a display device such as a monitor or projector. It is broadly divided into two types: electronic type (hereinafter referred to as "electronic type").

Optical driving support devices are characterized in that they do not include an imaging device or display device between the optical path from the object to the eyes, only an optical element, and do not involve conversion from light to electricity. be. However, optical driving support devices have a problem in that when there is a window such as a windshield in the optical path, the image cannot be seen or is distorted due to reflection or refraction. Further, optical driving support devices have a problem in that there are many restrictions on the arrangement of mirrors or lenses, and it may be difficult to install them without interference.

On the other hand, electronic driving support devices are characterized by having an imaging device outside the vehicle, which converts light into an electrical signal, and then converts the electrical signal back into light using a display device installed inside the vehicle (for example, Patent Document 1). An electronic driving support device is advantageous over an optical driving support device in that it has a high degree of freedom in installing an imaging device and a display device.

Japanese Patent Application Publication No. 2011-213184

However, in conventional electronic driving support devices, the driver's viewpoint position and the camera's viewpoint position are different, so the display device displays information regarding changes in the size of the moving object directly viewed by the driver. However, there is a problem in that the size of the moving object varies, making the driver feel uncomfortable.

An object of the present disclosure is to provide a driving support device that can suppress the difference between a change in the size of a moving object directly viewed by a driver and a change in the size of a moving object displayed on a display unit. The goal is to provide the following.

A driving support device according to the present disclosure is a driving support device that supports driving of a car driver, and includes a plane mirror including a mirror surface that reflects a blind spot area outside the car, and a mirror image of the blind spot area reflected on the mirror surface. and a display unit that displays the mirror image imaged by the imaging device, and the imaging device has a distance from the mirror surface that is equal to the distance between the viewpoint position of the driver and the mirror surface. provided at a position equal to the distance.

According to the present disclosure, it is possible to suppress the difference between a change in the size of a moving object directly seen by a driver and a change in the size of a moving object displayed on a display unit.

Schematic diagram of a vehicle having a driving support device according to Embodiment 1 of the present disclosure Schematic diagram of a driving support device according to Embodiment 1 of the present disclosure A diagram illustrating an example of the positional relationship between the viewpoint of a driver of a car having a driving support device according to an embodiment of the present disclosure and a person to be imaged A diagram illustrating an example of a change in the size of a moving subject to be imaged as seen from the viewpoint position of a driver of a car having a driving support device according to an embodiment of the present disclosure. A diagram illustrating an example of a change in the size of a moving subject to be imaged as seen from the viewpoint position of an image sensor of a driving support device according to an embodiment of the present disclosure. Schematic diagram of a driving support device according to Embodiment 2 of the present disclosure

Embodiments of the present disclosure will be described in detail below with reference to the drawings. However, the embodiment described below is an example, and the present disclosure is not limited to this embodiment. Note that detailed explanations of already well-known matters, redundant explanations of substantially the same configurations, etc. may be omitted as appropriate.

(Embodiment 1)
<Configuration of driving support device>
The configuration of the driving support device 1 according to the embodiment of the present disclosure will be described in detail with reference to FIGS. 1 to 3C.

In addition, in FIGS. 3A to 3C, the imaged person A1 indicates the imaged person A who is farther away from the driver B than the imaged person A2, and the imaged person A2 is farther away from the driver B than the imaged person A2. shows the person to be imaged A who is closer than the person to be imaged A1.

The driving support device 1 according to the present embodiment is provided at the front right pillar 101 and the front left pillar 102 of the automobile 100, and reduces the blind spot caused by the front right pillar 101 and the front left pillar 102. Specifically, the driving support device 1 includes a plane mirror 10, an imaging device 20, and a display section 30. The plane mirror 10 and the imaging device 20 are provided outside the automobile 100. Further, the display section 30 is provided inside the automobile 100.

The plane mirror 10 includes a mirror surface 11 that reflects the outside blind spot area of the automobile 100. The direction of the plane mirror 10 can be changed.

The imaging device 20 captures a mirror image of the blind area reflected on the mirror surface 11 of the plane mirror 10 and outputs an imaging signal to the display unit 30.

The display unit 30 displays a mirror image captured by the imaging device 20 based on the imaging signal input from the imaging device 20 .

In the driving support device 1 having the above configuration, the distance L2 between the imaging device 20 and the mirror surface 11 of the plane mirror 10 is equal to the distance L1 between the viewpoint position of the driver B and the mirror surface 11 (L1=L2 ). In particular, the distance L2 between the entrance pupil of a lens (not shown) of the imaging device 20 and the intersection of the optical axis of the imaging device 20 on the mirror surface 11, the viewpoint position of the driver B, and the distance It is preferable to make the distance L1 between the point of intersection of the viewpoint and the optical axis equal. Although the viewpoint position of driver B changes depending on the driving position of driver B, it is assumed that the distance L1 is defined with the position of the seat where driver B is seated as the viewpoint position of driver B.

Here, the viewpoint position of the driver B with respect to the person A to be imaged is farther than the distance between the person A to be imaged and the imaging device 20 by a distance G (see FIG. 1). Therefore, when the imaging device 20 directly images the person A to be imaged, the viewpoint position of the driver B and the viewpoint position of the imaging device 20 are different. In this case, when the imaged person A moves from A1 to A2 as shown in FIG. 3A, the change in the size of the imaged person A shown in FIG. 3B when viewed from the viewpoint position of the driver B is This is smaller than the change in the size of the imaging subject A shown in FIG. 3C when viewed from the viewpoint position No. 20. Such a difference in change becomes more noticeable as the distance between the imaging subject A and the driving support device 1 becomes smaller.

In contrast, the driving support device 1 according to the present embodiment uses the imaging device 20 to capture a mirror image of the blind spot area reflected on the mirror surface 11 of the plane mirror 10, and also by making the distance L1 and the distance L2 the same. , it is possible to bring the change in size of the moving person A seen from the viewpoint of the driver B closer to the change in the size of the moving person A seen from the viewpoint of the imaging device 20. .

For example, when the imaged person A moves from A1 to A2 as shown in FIG. The change in size can be brought close to the change in the size of the person A to be imaged when viewed directly from the viewpoint position of the driver B.

At this time, by changing the direction of the plane mirror 10, a desired area of the blind area can be reflected on the mirror surface 11.

Incidentally, in conventional driving support devices, when the imaged person A moves from A1 to A2 as shown in FIG. 3A, the size of the imaged person A as seen from the viewpoint position of the imaging device displayed on the display unit Since the change in is larger than the change in the size of the person A to be imaged when viewed directly from the viewpoint position of the driver B, the driver B feels a sense of discomfort.

Here, making the distance L1 and the distance L2 equal includes making the distance L1 and the distance L2 substantially equal within a range where the driver B does not feel any discomfort (when L1 and L2 are substantially equal).

As described above, according to the present embodiment, the plane mirror 10 includes the mirror surface 11 that reflects the blind spot area outside the vehicle, the imaging device 20 captures the mirror image of the blind spot region reflected on the mirror surface 11, and the imaging device 20 captures an image. and a display unit 30 that displays a mirror image image, and the distance L2 between the imaging device 20 and the mirror surface 11 is equal to the distance L1 between the viewpoint position of the driver B and the mirror surface 11, so that the driver B The change in size of the moving object that is directly viewed can be brought closer to the change in the size of the moving object displayed on the display unit 30.

(Embodiment 2)
<Configuration of driving support device>
The configuration of the driving support device 2 according to the embodiment of the present disclosure will be described in detail with reference to FIG. 4.

Note that in FIG. 4, parts having the same configuration as those in FIG. 2 are designated by the same reference numerals, and the description thereof will be omitted.

The driving support device 2 according to the present embodiment is provided at the front right pillar 101 and the front left pillar 102 of the automobile 100, and reduces the blind spot caused by the front right pillar 101 and the front left pillar 102. Specifically, the driving support device 2 includes a display unit 30, a first plane mirror 110, a second plane mirror 111, and an imaging device 120. The first plane mirror 110, the second plane mirror 111, and the imaging device 120 are provided outside the automobile 100. Further, the display section 30 is provided inside the automobile 100.

The first plane mirror 110 includes a first mirror surface 112 that reflects the blind area outside the vehicle 100. The direction of the first plane mirror 110 can be changed.

The second plane mirror 111 includes a second mirror surface 113 that reflects the first mirror image of the blind spot area reflected on the first mirror surface 112. The direction of the second plane mirror 111 can be changed according to the direction of the first plane mirror 110.

The imaging device 120 captures a second mirror image of the blind spot area reflected on the second mirror surface 113 and outputs an imaging signal to the display unit 30.

The display unit 30 displays the second mirror image captured by the imaging device 20 based on the imaging signal input from the imaging device 20 .

In the driving support device 2 having the above configuration, the sum of the distance L5 between the imaging device 120 and the second plane mirror 111 and the distance L4 between the first plane mirror 110 and the second plane mirror 111 (L4+L5) is equal to the distance L3 between the viewpoint position of the driver B and the first mirror surface 112 (L4+L5=L3). In particular, the distance L5 between the entrance pupil of a lens (not shown) of the imaging device 120 and the intersection of the optical axis of the imaging device 20 on the second mirror surface 113, and the distance between the second mirror surface 113 and the first mirror surface 112. The intersection of the intersection with the optical axis of the second plane mirror 111 and the distance L4, the intersection of the driver B's viewpoint position and the optical axis of the driver's viewpoint on the first mirror surface 112 It is preferable to make the distance L3 and the distance L3 equal to each other. Although the viewpoint position of driver B changes depending on the driving position of driver B, it is assumed that the distance L3 is defined by setting the position of the seat where driver B is seated as the viewpoint position of driver B.

The driving support device 2 according to the present embodiment uses the imaging device 120 to capture a second mirror image of the blind spot area reflected on the first mirror surface 112 of the first plane mirror 110, and also adds the distance L4 and the distance L5. By making the distance L3 the same as the distance L3, a change in the size of the person A to be imaged as seen from the viewpoint position of the driver B and a change in the size of the person A to be imaged as seen from the viewpoint position of the imaging device 120. and can be brought closer together.

For example, when the imaged person A moves from A1 to A2 as shown in FIG. The change in size can be matched with the change in the size of the moving person A to be imaged as viewed directly from the viewpoint position of the driver B.

At this time, by changing the direction of the first plane mirror 110 and changing the direction of the second plane mirror 111 according to the direction of the first plane mirror 110, a desired area of the blind area can be moved to the first mirror surface 112. and can be reflected on the second mirror surface 113.

Here, to make the distance L3 equal to the sum of the distances L4 and L5, the distance L3 and the sum of the distances L4 and L5 must be equalized within a range where the driver B does not feel discomfort. This also includes making and substantially equal (when L3 and (L4+L5) are substantially equal).

As described above, according to the present embodiment, the first plane mirror 110 includes the first mirror surface 112 that reflects the blind spot area outside the automobile 100, and the first mirror image of the blind spot area reflected on the first mirror surface 112. a second plane mirror 111 having a second mirror surface 113 that reflects a second mirror surface 113; an imaging device 120 that captures a second mirror image of the blind area reflected on the second mirror surface 113; and a second mirror image captured by the imaging device 120. The sum of the distance L5 between the imaging device 120 and the second plane mirror 111 and the distance L4 between the first plane mirror 110 and the second plane mirror 111 is , equal to the distance between the driver B's viewpoint and the first mirror surface 112, in addition to the effects of the first embodiment described above, it is possible to reduce restrictions on the installation position of the imaging device 120, and also to provide driving support. The device 2 can be downsized.

It should be noted that the present invention is not limited to the types, arrangement, number, etc. of members to the above-described embodiments, and may deviate from the gist of the invention, such as by appropriately replacing the constituent elements with those having equivalent effects. Of course, changes can be made as appropriate to the extent that it does not.

Specifically, in the first and second embodiments described above, the image of the blind spot area formed by the front right pillar 101 and the front left pillar 102 is displayed on the display unit 30, but the present invention is not limited to this. An image of a blind spot area such as a pillar or a door may be displayed on the display unit 30.

Further, in the first and second embodiments described above, a mirror image of the person to be imaged A, who is a person, is captured by the imaging device 20 or the imaging device 120, but the invention is not limited to this. It can also be applied when capturing a mirror image of a moving object other than a person, such as a car.

The driving support device according to the present disclosure is suitable for supporting driving of an automobile driver.

1 Driving support device 2 Driving support device 10 Plane mirror 11 Mirror surface 20 Imaging device 30 Display section 100 Car 101 Front right pillar 102 Front left pillar 110 First plane mirror 111 Second plane mirror 112 First mirror surface 113 Second mirror surface 120 Imaging Device A Person to be imaged B Driver

Claims (3)

A driving support device that supports driving of a car driver,
a plane mirror that is provided on a front right pillar and/or a front left pillar of the vehicle and includes a mirror surface that reflects a blind area in front of the exterior of the vehicle;
an imaging device that is provided opposite to the mirror surface of the plane mirror and captures a mirror image of the blind spot area reflected on the mirror surface;
a display unit that is provided in the vehicle, receives an imaging signal from the imaging device, and displays an image of the blind spot area based on the imaging signal ;
has
The distance between the imaging device and the mirror surface is equal to the distance between the driver's viewpoint position and the mirror surface.
A driving support device characterized by: The plane mirror is
The direction can be changed,
The driving support device according to claim 1, characterized in that: A driving support device that supports driving of a car driver,
a first plane mirror that is provided on a front right pillar and/or a front left pillar of the vehicle and includes a first mirror surface that reflects an external front blind spot area of the vehicle;
a second plane mirror provided opposite to the first mirror surface of the first plane mirror and including a second mirror surface that reflects the first mirror image of the blind spot area reflected on the first mirror surface;
an imaging device that is provided opposite to a second mirror surface of the second plane mirror and captures a second mirror image of the blind spot area reflected on the second mirror surface;
a display unit that is provided in the vehicle, receives an imaging signal from the imaging device, and displays an image of the blind spot area based on the imaging signal ;
has
The sum of the distance between the imaging device and the second mirror surface and the distance between the first mirror surface and the second mirror surface is the distance between the driver's viewpoint and the first mirror surface. be equivalent to,
A driving support device characterized by:

Images