JP2010167852A - Rear confirming device of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restrain a cost increase, by compactly confirming the rear when a vehicle retreats. <P>SOLUTION: This rear confirming device 30 of the vehicle has a camera 31 for photographing a vehicle peripheral picture, and a display 32 arranged in front of a driver's seat 13 in a cabin 12 and outputting the picture of the camera 31. A mirror 33 for reflecting the picture of the display 32 is arranged in the rear of the driver's seat 13. A concave mirror is used for the mirror 33, and a rear picture of a position provided with the mirror 33 is outputted to the display 32. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle rear confirmation device that enables a lower rear portion that cannot be normally viewed from a driver's seat to be viewed.

2. Description of the Related Art As a vehicle rear confirmation device, a device in which a camera is mounted on a vehicle and an image captured by the camera is displayed on a display (monitor) provided in a vehicle interior is known.
This type of vehicle rearward confirmation device provides a driver with an image of a view area that cannot be viewed from the driver's seat.
As such a vehicle rear confirmation device, a device that displays a rear image on a display provided behind the driver's seat and a device that displays a rear image on a display provided in front of the driver's seat are known. (For example, refer to Patent Documents 1 and 2.)

  The vehicle rear confirmation device of Patent Document 1 is provided with a camera on a vehicle body and a display for displaying a rear image captured by the camera in front of a driver.

  The vehicle rear confirmation device of Patent Document 2 is provided with a camera on a vehicle body, displays a rear image captured by the camera, and a display on which a passenger seated in a rear seat can visually recognize a TV program or the like is located behind the driver. It is provided. In other words, the display is also used for viewing a television program for the rear passenger.

  However, in the vehicle rearward confirmation device disclosed in Patent Document 1, when the driver moves the vehicle backward (back), if the driver is gazing only at the display (monitor), the rear view cannot be seen directly and is reflected in the camera. Only the range can be recognized by the driver. Therefore, it is necessary to directly check the rear view outside the range reflected in the camera by using a rearview mirror (room mirror) or side mirror, or by looking back directly. That is, there is a problem that the driver needs to move the line of sight many times, and the confirmation operation becomes complicated.

  In addition, in the vehicle rear confirmation device disclosed in Patent Document 2, a rear-seat occupant display disposed behind the driver's seat is used to check the rear image displayed on the display at the same time as the rear view when the vehicle moves backward. can do. However, a display for the rear seat occupant is separately required, and a rotation mechanism for the display is also required, which causes a problem of increasing costs.

Japanese Utility Model Publication No. 6-936 Japanese Patent No. 3572378

  It is an object of the present invention to provide a vehicle rear confirmation device that can simplify the vehicle rearward confirmation when the vehicle is moving backward and can suppress an increase in cost.

  According to a first aspect of the present invention, there is provided an apparatus for confirming the rear of a vehicle, comprising: a camera that captures an image of the surroundings of the vehicle; It is characterized in that a mirror for displaying the video on the display is provided behind.

  The invention according to claim 2 is characterized in that the mirror is a concave mirror.

  The invention according to claim 3 is characterized in that the mirror is provided in a rear seat of the passenger compartment.

  The invention according to claim 4 is characterized in that an image behind the position where the mirror is provided is output to the display.

  The invention according to claim 5 is characterized in that a separate monitor that can be visually recognized by an occupant seated in the rear seat is attached in the vehicle interior, and a mirror is provided on the back surface of the separate monitor.

  In the invention according to claim 6, an image of the vehicle surroundings when the vehicle is viewed from above is displayed on the display, the mirror is formed as a concave mirror in the vertical direction, and the focal length in the vertical direction of the mirror is It is characterized by being set shorter than the distance to the display.

The present invention has the following effects.
According to the first aspect of the present invention, the vehicle rear confirmation device includes a camera that captures an image of the periphery of the vehicle, and a display that is provided in front of the driver's seat in the passenger compartment and outputs the image of the camera. A mirror that displays the video on the display behind the driver's seat was installed. That is, since only a mirror is provided, a cost increase can be suppressed as compared with a case where a new display is provided behind the driver's seat.
Generally, when the rear view is displayed on the display in front of the driver's seat, a horizontally reversed image is output, and when a display is provided behind the driver's seat, the images on the front display and the rear display are different. The image processing circuit becomes complicated.
By providing a mirror that reflects the video on the display behind the driver's seat, the video on the front display can be viewed as a normal image in the rear view. That is, the video displayed on the front display can be used as it is, and the backward confirmation can be performed simply.

In the invention which concerns on Claim 2, since a mirror is a concave mirror, the image | video of a display can be expanded and visibility improves.
At the same time, since the focal distance of the virtual image on the display can be set far, the distance between the rear view that is directly viewed and the virtual image on the display can be reduced, and the movement of the focal point can be reduced.

  In the invention according to claim 3, since the mirror is provided in the rear seat of the passenger compartment, the view from the rear window is not obstructed.

  In the invention according to claim 4, since the video behind the position where the mirror is provided is output to the display, the driver can directly view through the rear window and the lower side of the rear window which can be viewed through the display and the mirror. It is possible to intuitively grasp the positional relationship with (blind spot).

  In the invention according to claim 5, since another monitor that can be visually recognized by the passenger seated in the rear seat is attached in the vehicle interior, and a mirror is provided on the back surface of the other monitor, for example, the support brackets can be omitted. And the number of parts can be reduced. Further, since it can be stored simultaneously with another monitor, the view is not disturbed when it is unnecessary.

  In the invention which concerns on Claim 6, the image of the vehicle periphery in the state which looked at the vehicle from the sky is displayed on a display, a mirror is formed in a concave mirror regarding an up-down direction, and the focal distance of the up-down direction of a mirror is a mirror. Since the distance is set to be shorter than the distance to the display, a screen in which the vertical direction of the screen displayed on the display is reversed can be displayed on the mirror. Thereby, the direction of the back direct view and the view reflected on the mirror can be matched, and the uncomfortable feeling felt by the driver can be eliminated.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view of the vehicle back confirmation apparatus of Example 1 which concerns on this invention. FIG. 2 is a plan view of the vehicle rear confirmation device shown in FIG. 1. It is a side view of the vehicle back confirmation apparatus of Example 2 which concerns on this invention. FIG. 4 is a plan view of the vehicle rear confirmation device shown in FIG. 3. FIG. 4 is a perspective view of the vehicle rear confirmation device shown in FIG. 3. It is a side view of the vehicle back confirmation apparatus of Example 3 which concerns on this invention. FIG. 7 is a plan view of the vehicle rear confirmation device shown in FIG. 6. It is a perspective view of the vehicle back confirmation apparatus of Example 4 which concerns on this invention. FIG. 9 is a perspective view of a mirror of the vehicle rear confirmation device shown in FIG. 8. FIG. 9 is a comparative study diagram of a mirror of the vehicle rear confirmation device shown in FIG. 8.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.

  As shown in FIGS. 1 and 2, the vehicle 10 is provided in a passenger compartment 12 and includes a first row seat 15 including a driver's seat 13 and a passenger seat 14, and 2 provided behind the first row seat 15. A row seat (rear seat) 16, a third row seat 17 provided behind the second row seat 16, a rear window 18 provided behind the third row seat 17 and ensuring a rear view, A vehicle rear confirmation device 30 that confirms a rear view that cannot be viewed from the driver's seat 13.

  A vehicle rearward confirmation device 30 is provided at a rear portion of the vehicle body 11, a camera 31 that captures an image around the vehicle, a display 32 that is provided around the instrument panel 19 and outputs an image of the camera 31, and a driver seat 13. And a mirror 33 provided on the roof 21 of the passenger compartment 12 to capture the image of the display 32.

  The camera 31 captures an image behind the position where the mirror 33 is provided and a view area that cannot be viewed from the driver's seat 13.

On the display 32, an image behind the position where the mirror 33 is provided is output, and information on a navigation system (not shown), a television program, and the like are displayed in addition to the image captured by the camera 31. The video captured by the camera 31 is reversed left and right and output to the display 32.
Preferably, by displaying only the lower part of the rear glass (the part of the blind spot) on the display 32, it is possible to display a large field of view that is not directly visible.

The mirror 33 is a concave mirror.
In FIG. 1, by using a concave mirror having a curved surface radius R and a focal length f instead of a plane mirror, the distance y from the mirror to the virtual image can be set farther than the distance x from the mirror to the light source (screen). That is, when the image magnification is M, the size of the image (image) can be increased.

Focal length formula: 1 / x-1 / y = 1 / f (1)
1 / f = 2 / R ………………………… (2)
Substituting equation (2) into equation (1)
y = 1 / (1 / x-2 / R) (3)
It can be expressed as.
Image magnification at that time: M = y / x (4)
It can be expressed as.
For example, if x = 1.5 m and R = 6 m are set, y = 3 m and M = 2 can be increased (appears far away). That is, the virtual image 32a of the display 32 is recognized greatly.

  The vehicle rearward confirmation device 30 according to the first embodiment includes a camera 31 that captures an image around the vehicle and a display 32 that is provided in front of the driver's seat 13 in the passenger compartment 12 and outputs the image of the camera 31. . A mirror 33 that captures the image of the display 32 is provided behind the driver's seat 13. That is, since only the mirror 33 is provided, an increase in cost can be suppressed as compared with a case where a new display is provided behind the driver's seat 13.

  Generally, when a rear view is displayed on the display 32 in front of the driver's seat, a horizontally inverted image is output. When the display 32 is provided behind the driver's seat, the front display 32 and the rear display 32 Therefore, it is necessary to make the images different, and the image processing circuit becomes complicated.

  By providing the mirror 33 that captures the image of the display 32 behind the driver's seat 13, the image of the front display 32 can be viewed as a normal image of the rear view. That is, the video displayed on the front display 32 can be used as it is, and the backward confirmation can be performed simply.

Since the mirror 33 is a concave mirror, the image of the display 32 can be enlarged, and the visibility is improved.
At the same time, since the focal length of the virtual image 32a on the display 32 can be set far, the distance between the rear view that is directly viewed and the virtual image 32a on the display 32 can be reduced, and the movement of the focal point can be reduced.

  Further, since a video image behind the position where the mirror 33 is provided is output to the display 32, a direct field of view that the driver can visually recognize through the rear window 18 and a position below the rear window 18 that can be visually recognized through the display 32 and the mirror 33 are displayed. It is possible to intuitively grasp the positional relationship with (blind spot).

  As shown in FIGS. 3 to 5, the vehicle 40 is provided in a passenger compartment 42 and includes a first row seat 45 including a driver seat 43 and a passenger seat 44, and 2 provided behind the first row seat 45. A row seat (rear seat) 46, a third row seat 47 provided behind the second row seat 46, a rear window 48 provided behind the third row seat 47 and ensuring a rear view, A vehicle rear confirmation device 60 for confirming a rear view that cannot be visually recognized from the driver's seat 43.

  The vehicle rear-viewing device 60 is provided at the rear of the vehicle body 41 to shoot a video around the vehicle 41, a display 62 provided around the instrument panel 49 to output the video from the camera 61, and a display shown in FIG. As described above, the second row seat (rear seat) 46 is provided at a substantially central position of the seat back 52 and includes a mirror 63 that captures an image on the display 62.

Since a concave mirror is used for the mirror 63, the virtual image 62a of the display 62 is largely recognized.
The camera 61 captures an image behind the position where the mirror 63 is provided and a view area that cannot be viewed from the driver's seat 43.

On the display 62, an image behind the position where the mirror 63 is provided is output, and information on a navigation system (not shown), a television program, and the like are displayed in addition to the image captured by the camera 61. The video imaged by the camera 61 is reversed left and right and output to the display 62.
Preferably, by displaying only the lower part of the rear window 48 (the blind spot) on the display 62, it is possible to display a large field of view that is not directly visible.

  In the vehicle rearward confirmation device 60 according to the second embodiment, the mirror 63 is provided in the rear seat of the passenger compartment 42, so that the view from the rear window 48 is not hindered.

As shown in FIGS. 6 and 7, the vehicle 70 is provided in a passenger compartment 72 and includes a first row seat 75 including a driver seat 73 and a passenger seat 74, and 2 provided behind the first row seat 75. A row seat (rear seat) 76, a third row seat 77 provided behind the second row seat 76, a rear window 78 provided behind the third row seat 77 and ensuring a rear view; An occupant seated in the second row seat (rear seat) 76 or the third row seat 77 confirms a separate monitor 82 that can visually recognize navigation system (not shown) information and TV programs, and a rear view that cannot be seen from the driver seat 73. A vehicle rearward confirmation device 90 is provided.
The separate monitor 82 is provided behind the driver's seat 73 and can be stored in the roof 81 of the passenger compartment 72.

  A vehicle rearward confirmation device 90 is provided at a rear portion of the vehicle body 71, a camera 91 that captures an image around the vehicle, a display 92 that is provided around the instrument panel 79 and outputs an image of the camera 91, and a separate monitor 82. The mirror 93 is provided on the back surface 82a and captures the image of the display 92. Since a concave mirror is used for the mirror 93, the virtual image 92a of the display 92 is largely recognized.

  The camera 91 captures an image behind the position where the mirror 93 is provided and a view area that cannot be viewed from the driver's seat 73.

On the display 92, a video behind the position where the mirror 93 is provided is output, and in addition to the video taken by the camera 91, navigation system information, a television program, and the like are displayed. The video captured by the camera 91 is reversed left and right and output to the display 92.
Preferably, by displaying only the lower part of the rear glass (the blind spot part) on the display 92, it is possible to display a large field of view that cannot be seen directly in the field of view.

  In the vehicle rearward confirmation device 90 according to the third embodiment, another monitor 82 that can be seen by a passenger seated in the rear seat is attached in the passenger compartment 72, and a mirror 93 is provided on the back surface 82a of the other monitor 82. Therefore, for example, a support metal fitting etc. can be omitted and the number of parts can be reduced. Further, since it can be stored simultaneously with the separate monitor 82, the field of view is not hindered when unnecessary.

  8 to 10 show a vehicle rearward confirmation device 110 according to a fourth embodiment. The vehicle rear confirmation device 110 is an embodiment corresponding to a modification of the vehicle rear confirmation device 60 shown in FIG. The same parts as those used in the vehicle rearward confirmation device 60 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The vehicle rearward confirmation device 110 is provided at the rear of the vehicle body 41 (see FIG. 3), and a camera 61 that captures images around the vehicle, and a display 62 that is provided around the instrument panel 49 and outputs the images of the camera 61. The second row seat (rear seat) 46 is provided at substantially the center of the seat back 52, and includes a mirror 113 (see FIG. 8) that captures the image of the display 62.

In FIG. 9, the mirror 113 is formed in a straight line as indicated by a straight line L1 in the left-right direction (lateral direction), and is formed in a concave curve having a focal length f1 in the vertical direction (vertical direction). Furthermore, the vertical focal length f1 of the mirror 113 is formed to be shorter than the distance from the mirror 113 to the display 62 (see FIG. 3). In other words, the concave mirror uses the fact that the mapping is reversed upside down for an object longer than a predetermined focal length, so that the front and back of the vehicle body 41 are reversed and displayed.
The mirror 113 is a mirror attached at the same position as the mirror 63 (see FIG. 3).

  FIG. 10A shows a top view image displayed on the front display 62, as viewed from the driver, in front of the vehicle upward, behind the vehicle below, on the right side of the vehicle on the right side, and on the left side of the vehicle. The left is displayed.

  In FIG. 10B, when the top view image of the display 62 shown in FIG. 10A is viewed with a normal mirror 213 installed on the seat back surface of the rear seat, the vehicle is viewed upward from the driver. The rear of the vehicle is displayed in front and below, the left of the vehicle is displayed on the right, and the right of the vehicle is displayed on the left. That is, the front and rear of the vehicle are visually recognized in the opposite direction to the actual vehicle 40 (see FIG. 3). The normal mirror 213 is a plane mirror or a convex mirror.

  In FIG. 10C, for example, when viewing the top view image of the display 62 with the mirror 113 installed on the seat back 52 surface of the rear seat (second row seat) 46, it is upward when viewed from the driver. After the vehicle, the front of the vehicle is displayed below, the left of the vehicle is displayed on the right side, and the right of the vehicle is displayed on the left side. That is, the front and rear of the vehicle are visually recognized in the same direction as the actual vehicle 40 (see FIG. 3).

For example, when the vehicle speed is equal to or lower than a threshold (for example, 12 km / h), for a system that displays a top view image on the front display (navigation screen), the seat back surface of the rear seat has a lateral direction (lateral direction). With a mirror that is formed in a straight or convex curve with a concave curve in the vertical direction (vertical direction), the image is inverted when the distance is longer than the focal length of the concave mirror, and the image is reversed up and down. It can function as a functional mirror.
As a result, by using the concave mirror that reverses the image in the vertical direction to present an image in which the rear of the vehicle is reflected upward, it is possible to naturally recognize the top view image while directly looking at the rear. In addition, when a normal mirror is used, the front of the vehicle is reflected on the top, and the feeling of strangeness is remarkable.

  In the vehicle rearward confirmation device 110, an image around the vehicle when the vehicle 40 is viewed from above is displayed on the display 62 (see FIG. 3), and the mirror 113 is formed as a concave mirror in the vertical direction. Since the focal length f1 in the vertical direction is set to be shorter than the distance between the mirror 113 and the display 62, a screen in which the vertical direction of the screen displayed on the display 62 is reversed on the mirror 113 can be displayed. Thereby, the direction of the back direct view and the view reflected on the mirror 113 can be matched, and the uncomfortable feeling felt by the driver can be eliminated.

  As shown in FIG. 1, in the vehicle rear confirmation device 30 according to the present invention, a concave mirror is used as the mirror 33. However, the present invention is not limited to this and does not prevent the use of a plane mirror or a convex mirror. .

Moreover, although the vehicle back confirmation apparatus according to the present invention captures a video around the vehicle with a camera, a video behind the vehicle is included around the vehicle.
In FIG. 9, the mirror 113 is formed in a straight line in the left-right direction (lateral direction), but does not prevent the formation of a convex surface or a concave surface.

As in the case of the mirror 33 shown in FIG. 1, in the case of ceiling installation, the mirror mounting portion can be used (shared) as a storage space.
As in the case of the mirror 33 shown in FIG. 1, in the case of ceiling installation, a scene in front of the vehicle may be displayed on the mirror at the same time as the navigation screen.

In the mirrors 33, 63, and 93 shown in FIG. 1, FIG. 3, or FIG. 6, the mirror is configured to be stored in the roof or the seat, and the storage mirror automatically comes out or is stored in conjunction with the back gear signal. A configuration is also possible.
In the mirrors 33, 63, and 93 shown in FIG. 1, FIG. 3, or FIG. 6, the mirror installation position is not limited to the roof or the seat. For example, it may be near the upper part of the passenger seat.

  The vehicle rearward confirmation device according to the present invention is suitable for use in passenger cars such as sedans and wagons.

  10, 40, 60 ... vehicle, 12, 42, 72 ... passenger compartment, 13 ... driver's seat, 16, 46, 76 ... rear seat (second row seat), 30, 60, 90, 110 ... vehicle rear confirmation device 31 ... Camera, 32 ... Display, 33, 63, 93, 113 ... Mirror, 82 ... Another monitor, 82a ... Back side.

Claims (6)

In a vehicle rear confirmation device comprising a camera that captures a video around the vehicle, and a display that is provided in front of a driver's seat in the passenger compartment and that outputs the video of the camera.
An apparatus for confirming the rear of a vehicle, wherein a mirror for displaying the image of the display is provided behind a driver's seat.   The vehicle rear confirmation apparatus according to claim 1, wherein the mirror is a concave mirror.   The vehicle rear confirmation device according to claim 1, wherein the mirror is provided in a rear seat of the vehicle compartment.   4. The vehicle rear confirmation apparatus according to claim 3, wherein a video image behind the position where the mirror is provided is output to the display.   The rear of the vehicle according to claim 1 or 2, wherein a separate monitor is provided in the passenger compartment so that an occupant seated on a rear seat can visually recognize the rear surface of the separate monitor. Confirmation device.   The display displays an image of the surroundings of the vehicle when the vehicle is viewed from above, the mirror is formed as a concave mirror in the vertical direction, and the vertical focal length of the mirror is the mirror and the display. The vehicle backward confirmation device according to claim 1, wherein the vehicle backward confirmation device is set to be shorter than the distance between the vehicle and the vehicle.

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