JP2012106732A - Vehicle periphery display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle periphery display device which enables both a person with normal color vision and a person with weak color vision to surely recognize the sense of distance from a vehicle without changing display.SOLUTION: The vehicle periphery display device displays an image around the vehicle photographed by a camera and distance reference lines 22, 23 indicating a position separated by a prescribed distance from the vehicle by superposing the image and distance reference lines on an indicator provided in the vehicle. The distance reference lines 22, 23 include a first distance reference line 22 and a second distance reference line 23 displayed on a position separated from the vehicle from the first distance reference line 22. The first distance reference line 22 is displayed thicker than the second distance reference line 23.

Description

The present invention relates to a device that displays the periphery of a vehicle, and in particular, when parallel parking or parallel parking of vehicles, a peripheral image of the vehicle and a distance guide line for recognizing a sense of distance from the vehicle, The present invention relates to a device that displays images in a superimposed manner.

Conventionally, there is known a method for assisting a beginner who is unfamiliar with parking such as parallel parking or parking in a parking operation. For example, Patent Document 1 includes a parking assist that includes a CCD camera behind the vehicle, acquires an image behind the vehicle, displays the image on a monitor display, and superimposes a predicted traveling locus 20 according to the steering angle on the rear image. An apparatus is disclosed. The predicted traveling locus 20 includes a line indicating the traveling direction of the vehicle and a distance guide line indicating the distance from the vehicle. The distance guide line has a distance guide line displayed at a position close to the vehicle and a distance guide line displayed at a position farther from the vehicle than the distance guide line.

Further, Patent Document 2 discloses an intersection information display method that facilitates identification of road distinction at an intersection by performing display settings according to the visual perception of a driver with weak color or color blindness or a passenger who is affected by screen reflection. A road information device is disclosed. Specifically, this display method and display device distinguishes the type of road using an arrow for each of “pattern + thickness”, and also incorporates other elements such as shape, color, brightness and darkness. By using the “design of the preceding display by direction”, the display can be freely edited into a display that is easy to see for the driver.

However, the predicted traveling track 20 of Patent Document 1 is displayed at a line closer to the vehicle and a line far from the vehicle, particularly a distance guide line displayed at a position closer to the vehicle and a position farther than that. The distance reference line is displayed as a line with almost the same width. For this reason, it may be difficult for both the general color blind and the color weak to recognize the distance reference line. In this case, a sense of distance cannot be grasped, and parking assistance may not be sufficiently performed.

  Moreover, although the method and apparatus of patent document 2 can be set to the display which is easy to see for a color-impaired person, it does not make it easy to recognize the sense of distance to the vehicle. Further, in Patent Document 2, since it is necessary to switch the display according to each of the general color vision person and the color weak person, there is a risk of erroneous recognition and erroneous operation if the display is not switched to a display suitable for each.

JP-A-11-334470 JP 7-174576 A

  Therefore, the present invention provides a vehicle periphery display device that displays a distance reference line that allows both a general color blind person and a color weak person to easily grasp the sense of distance without switching the display.

What solves the said subject is as follows.

(1) An image of the surroundings of a vehicle photographed by a camera, a pair of left and right lines that change in conjunction with a steering operation and extend in a direction in which the vehicle is expected to travel, and a path when the vehicle is retreated straight A vehicle periphery display device that displays a vehicle width extension line indicating a guideline superimposed on a display provided in the vehicle, wherein the vehicle width extension line is displayed when the vehicle is in a straight traveling state. A vehicle periphery characterized in that it overlaps with a pair of left and right lines, and the pair of left and right lines and the vehicle width extension line are colored with mutually different colors so that the color-blind person can distinguish each other. Display device.

(2) The vehicle periphery display device according to (1), wherein the pair of left and right lines are colored in yellow, and the vehicle width extension line is colored in blue.

(3) Furthermore, a first distance guide line that indicates a position that is separated from the vehicle by a predetermined distance and that is disposed between the pair of left and right lines and extends in the left-right direction is superimposed on the display and displayed. The vehicle periphery display device according to (2), wherein the first distance reference line is colored in red.

(4) Further, a plurality of distance guide lines that indicate a position that is separated from the vehicle by a predetermined distance and that are arranged between the pair of left and right lines and extend in the left-right direction are superimposed on the display and displayed. The distance guide line closest to the vehicle among the distance guide lines is colored in red, and the other distance guide lines are colored in the same color as the pair of left and right lines. (2) .

(5) A vehicle periphery display device that displays a vehicle periphery image captured by a camera and two graphics superimposed on a display provided in the vehicle, wherein the two graphics are color A vehicle periphery display device characterized by being colored in different colors so that a weak person can identify each of the two graphics.

(6) Of the two graphics, one graphic is a fixedly displayed graphic, and the other graphic is a variably displayed graphic. The one graphic and the other graphic The graphics are the vehicle periphery display device according to (5), which may be displayed on the display device when the other graphics are variably displayed.

(7) The vehicle peripheral display device according to (5) or (6), wherein at least a part of the two graphics overlaps and is displayed on the display.

(8) A vehicle periphery display device that displays a vehicle periphery image captured by a camera and three graphics in a superimposed manner on a display provided in the vehicle, wherein the three graphics are color A vehicle periphery display device characterized by being colored in different colors so that a weak person can identify each of the three graphics.

ADVANTAGE OF THE INVENTION According to this invention, in a vehicle periphery display apparatus, the visibility of both a general color vision person and a color weak person improves, without switching a display.

FIG. 1 is a system configuration diagram of a vehicle periphery display device of the present invention. FIG. 2 is a diagram illustrating a screen of the display device at the time of parallel parking assistance. FIG. 3 is a diagram showing the expected course line displayed on the screen shown in FIG. 2 (for the convenience of explanation, only the predicted course line is extracted).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a system configuration diagram of a vehicle periphery display device of the present invention, FIG. 2 is a diagram showing a screen of a display at the time of parallel parking, and FIG. 3 is a diagram showing an expected course line shown in FIG. (For convenience of explanation, FIG. 3 is a diagram in which only an expected course line is extracted from FIG. 2).

The embodiment shown in FIG. 1 to FIG. 3 is an example in which the vehicle periphery display device of the present invention is applied to a parking assistance device for parallel parking.

As shown in FIG. 1, the vehicle periphery display device (parking assist device) 1 of the present invention has a control unit 16, a camera 17 that captures the rear of the vehicle, and a steering angle of a steering wheel (hereinafter referred to as steering). Steering sensor 2 to detect, lever switch 3 to detect the reverse state of the shift lever of the transmission, parking switch 4 to select a parking mode such as parallel parking or parallel parking, and right wheel to detect the left and right wheel speeds of the driven wheel A speed sensor 5, a left wheel side sensor 6, a speaker 8, a display 13, and a parking section detection image recognition device 15 are provided.

As shown in FIG. 2, the control unit 16 includes a CPU 11 that performs control, a graphics drawing circuit 12 that draws graphics on the display unit 13, and a superimposition that superimposes a graphics signal and a captured image from the camera 17. A circuit 9; a synchronization separation circuit 10 that extracts a synchronization signal from a camera image and supplies it to the graphics drawing circuit 12; and an image recognition device for detecting a parking area that receives a signal from the camera 17 and recognizes an image of the parking area. 15 and a voice synthesis circuit 7 for outputting a voice synthesis output to the speaker 8. Note that the image recognition device 15 may be provided separately from the control unit 16.

As shown in FIG. 2, signals from the camera 17, the steering sensor 2, the shift lever reverse switch 3, the parking switch 4, and the wheel speed sensors 5 and 6 are input to the control unit 16. Based on the above, the control unit 16 can superimpose and display a rear image of the vehicle and an expected course line 20 described later on the screen 14 of the display 13, and the speaker 8 generates sound to the driver. It is supposed to be.

In the vehicle periphery display device 1 having the above-described configuration, when the power source of the vehicle is in the ignition on mode, if the shift lever is reversed, the screen display of the indicator 13 becomes a parking assistance screen, as shown in FIG. The vehicle rear image and the predicted route 20 are superimposed on the screen 14 and displayed. In this state, for example, a selection switch (parking switch 4) for operating parking assistance for parallel parking and parallel parking is displayed on the screen. In the embodiment of the present invention, parking assistance for parallel parking is selected.

Since the predicted course 20 is superimposed on the rear image on the screen 14, the driver may steer the steering wheel while viewing the screen 14 or the rear, hold it at an appropriate position, and back. After that, when the vehicle enters the parking space 35 of the parking space horizontally, the steering is straightened, and when the vehicle is moved back to the end, the parking space 35 can be correctly entered, and appropriate assistance during the parking operation is performed.

As shown in FIG. 2, the expected course line 20 is variable in conjunction with the steering operation and a pair of left and right lines 21 extending in the direction in which the vehicle is expected to travel, and is variable in conjunction with the steering operation. Distance reference lines 22, 23, and 24 indicating a predetermined distance are provided. In addition, on the screen 14 of the display device 13, a vehicle width extension line 25 indicating a guide of the course when the vehicle is moved straight back is also displayed superimposed on the rear image. The vehicle width extension line overlaps with the expected course line 20 when the vehicle is traveling straight. In addition, the code | symbol 30 of FIG. 2 is a bumper of a vehicle.

The distance guide lines 22, 23, and 24 are the first distance guide line 22, the second distance guide line 23 arranged away from the vehicle from the first distance guide line 23, and the second distance guide line. 23, and a third distance guide line 24 that is spaced apart from the vehicle. Further, in the embodiment shown in FIGS. 2 and 3, the distance reference lines 22, 23, and 24 extend in the vehicle width direction (left and right direction in FIG. 2) with respect to the pair of left and right lines. Specifically, the first distance guide line 22 and the second distance guide line 23 are displayed so that one end and the other end are in contact with the middle of the pair of left and right lines 21, and the third distance guide line 24 is It is displayed so as to connect the end portion on the distal side with respect to the vehicle of the pair of left and right lines 21.

For example, the first distance guide line 22 is arranged about 0.5 m away from the rear end of the bumper of the vehicle, and the second distance guide line 23 is arranged about 1.0 m away from the rear end of the bumper of the vehicle. Has been. The operator can recognize the position of the vehicle with respect to the parking target position by looking at these distance guide lines. In the embodiment of the present invention, the first distance guide line 22 is a line displayed at a position closest to the vehicle.

As shown in FIG. 2, the first distance guide line 22 is displayed thicker than the second distance guide line 23. Further, the second distance guide line 23 is displayed thicker than the third distance guide line 24. In other words, the distance reference lines 22, 23, and 24 are displayed so as to become thicker as they approach the vehicle.

With this configuration, the first distance guide line 22 is closer to the second distance guide line 23 and the second distance guide line 23 is closer to the third distance guide line 24. Therefore, both the general color blind person and the color weak person can surely grasp the sense of distance. For example, when the first distance guide line 22 is displayed in red, a person who has low sensitivity to red may see that the first distance guide line 22 appears dark and the first distance guide line is not easily recognized. However, since the distance from the second distance guide line is displayed thicker than the second distance guide line as in the present invention, it is possible to feel a sense of perspective with respect to the second distance guide line.

The first distance guide line 22 preferably includes a distance guide line main body 22a and additional portions 22b and 22c that are displayed along the distance guide line main body 22a and have a difference in brightness from the distance guide line main body 22a.

In other words, it is preferable to form the first distance guide line 22 by overlapping a plurality of lines having light and dark differences in the vehicle traveling direction as in the present invention.

Specifically, in the embodiment shown in FIGS. 2 and 3, the first distance guide line 22 includes a distance guide line body 22a and a shadow 22b displayed along the vehicle side of the first distance guide line body 22a. And a highlight 22c displayed at a position away from the vehicle of the first distance guide line main body 22a. In the present invention, additional portions are displayed on both sides of the distance guide line main body 22a in the vehicle traveling direction. However, the present invention is not limited to this, and the additional portions may be displayed only on one side (for example, shadow portions, highlights). Only one of them may be displayed.)

Moreover, it is preferable that the distance reference line main body 22a is a color that calls attention to a general color sense person. Such a color is preferably red or the like. The color of the shadow 22b is preferably black. The highlight 22c is preferably yellow because it is easily recognized by people with weak colors.

In addition, the different color lines constituting the first distance guide line are different in thickness in the embodiment shown in FIG. 2 (distance guide line main body 22a, shadow portion 22b, highlight 22c). You may superimpose and display the line of the almost same thickness.

Further, it is preferable that the distance guide line main body 22 a constituting the first distance guide line 22 is displayed thicker than the second distance guide line 23.

In the embodiment of the present invention, the distance reference line is displayed as a solid line, but is not limited to this, and any line may be used as long as it is a standard of distance such as a broken line or a one-dot chain line. The concept of the distance guide line includes one in which a plurality of rectangular markers are arranged on a straight line. The first distance reference line is not limited to being displayed over the entire pair of left and right lines 21, and may be displayed only in the vicinity of the pair of left and right lines 21. In the embodiment of the present invention, three distance guide lines are displayed, but two or four or more distance guide lines may be displayed.

In addition, the pair of left and right lines 21 are preferably displayed so as to become thicker as they approach the vehicle in order to make it easier to grasp the sense of distance. Moreover, the part except the 1st distance reference | standard line among the estimated course lines 20 is displayed in yellow.

In addition, it is preferable that the vehicle width extension line 25 is blue considering the visibility of a color weak person. Further, the vehicle width extension line 25 may be displayed so as to become thicker as it approaches the vehicle.

  In addition, the vehicle periphery display apparatus of this invention is not limited to the application to the parking assistance apparatus for parallel parking, The parking assistance apparatus for parallel parking, When parking to the side (parking on the side of a road) The present invention may be applied to a parking assistance device or the like. Moreover, you may apply to the advance guidance apparatus of a parking assistance apparatus. Further, the peripheral display device of the present invention may be applied to devices other than the parking assist device. The vehicle periphery as used in the field of this invention is the concept containing back, front, and a side. Further, the image around the vehicle in the present invention is not limited to the image captured by the back monitor camera as in the embodiment of the present invention, and may be an image captured by the front camera and the side camera. Further, the peripheral display device is not limited to the configuration described above.

  Next, technical ideas other than the claims that can be grasped from the above embodiments will be described together with the effects thereof.

  (A) A vehicle periphery display device that displays an image of the periphery of a vehicle photographed by a camera and a distance guide line indicating a position spaced apart from the vehicle by being superimposed on a display provided in the vehicle. The distance guide line includes a first distance guide line and a second distance guide line displayed at a position farther from the vehicle than the first distance guide line, and the first distance guide line. Is displayed thicker than the second distance guide line.

  (B) The vehicle periphery display device according to (A), wherein the image around the vehicle is an image in a vehicle traveling direction.

  (C) The vehicle periphery display device further includes a third distance guide line that is displayed at a position farther from the vehicle than the second distance guide line and is displayed narrower than the second distance guide line. The vehicle periphery display device according to (A) or (B).

  (D) The vehicle periphery display device displays a pair of left and right lines extending in a direction in which the vehicle is expected to travel in a superimposed manner with the video and the distance guide line, The vehicle periphery display device according to any one of (A), (B), and (C) extending in a left-right direction with respect to the pair of left and right lines.

  (E) The first distance guide line includes a distance guide line main body and a shadow portion displayed along the distance guide line main body (A), (B), (C), (D ) The vehicle periphery display device according to any one of the above.

  (F) The first distance guide line includes a distance guide line main body and a yellow line displayed along the distance guide line main body (A), (B), (C), ( The vehicle periphery display device according to any one of D) and (E).

  According to the technical idea other than this claim, the distance guide line includes a first distance guide line and a second distance guide line displayed at a position farther from the vehicle than the first distance guide line. The first distance guide line is displayed thicker than the second guide line.

  With such a configuration, both the general color vision person and the color weak person can reliably grasp the sense of distance from the vehicle without switching the display.

  Moreover, it is preferable that the image | video of the vehicle periphery of technical ideas other than this claim is an image | video of a vehicle advancing direction.

  With such a configuration, both the general color blind person and the color weak person can reliably grasp the sense of distance from the vehicle in the traveling direction without switching the display.

  Further, the vehicle periphery display device according to the technical idea other than the present invention is further displayed at a position farther from the vehicle than the second distance guide line, and is displayed narrower than the second distance guide line. It is preferable that a third distance guide line is provided.

  With such a configuration, both the general color vision person and the color weak person can reliably grasp the sense of distance from the vehicle without switching the display.

  Further, the vehicle periphery display device of a technical idea other than the present invention displays a pair of left and right lines extending in the direction in which the vehicle is expected to overlap with the image and the distance guide line. The distance guide line preferably extends in the left-right direction with respect to the pair of left and right lines.

  With such a configuration, at the time of parking, both the general color vision person and the color-blind person can surely grasp the sense of distance from the vehicle without switching the display.

  The first distance guide line of the technical idea other than the claims includes a distance guide line main body and a shadow portion displayed along the distance guide line main body.

  With such a configuration, the distance guide line main body is prevented from sinking with respect to the screen, and the visibility of the distance guide line displayed at a position close to the vehicle is improved for those with weak colors.

  The distance guide line main body of the technical idea other than the present invention preferably includes a distance guide line main body and a yellow line displayed along the distance guide line main body.

  With such a configuration, the visibility for the color weak person with respect to the distance reference line displayed at a position close to the vehicle is improved.

1 Vehicle periphery display device (parking assist device)
2 Steering sensor 3 Shift lever reverse switch 4 Parking switch 5 Right wheel speed sensor 6 Left wheel speed sensor 7 Speech synthesis circuit 8 Speaker 9 Superimpose circuit 10 Sync separation circuit 11 CPU
12 Graphics Drawing Circuit 13 Display 14 Screen 15 Parking Area Detection Image Recognition Device 17 Camera 20 Expected Course Line 21 A Pair of Left and Right Lines (Lines Extending in the Vehicle Traveling Direction)
22 first distance guide line 22a distance guide line body 22b shadow 23 second distance guide line 24 third distance guide line 25 vehicle width extension line 30 bumper 35 parking section

Claims (8)

An image of the surroundings of the vehicle photographed by the camera, a pair of left and right lines that change in conjunction with the steering operation and extend in the direction in which the vehicle is expected to travel, and an indication of the course when the vehicle is moved straight back A vehicle periphery display device that superimposes and displays a vehicle width extension line on a display provided in the vehicle,
The vehicle width extension line overlaps the pair of left and right lines when the vehicle is in a straight traveling state,
The vehicle peripheral display device, wherein the pair of left and right lines and the vehicle width extension line are colored with mutually different colors so that the color weak can identify each other. 2. The vehicle periphery display device according to claim 1, wherein the pair of left and right lines are colored in yellow, and the vehicle width extension line is colored in blue. In addition, a first distance guide line that indicates a position that is separated from the vehicle by a predetermined distance and that is disposed between the pair of left and right lines and extends in the left-right direction is superimposed on the display and displayed. The vehicle periphery display device according to claim 2, wherein the distance guide line is colored in red. In addition, a plurality of distance guide lines indicating a position separated from the vehicle by a predetermined distance and extending between the pair of left and right lines and extending in the left-right direction are superimposed on the display and displayed. The vehicle periphery display device according to claim 2, wherein a distance guide line closest to the vehicle among the lines is colored in red, and the other distance guide lines are colored in the same color as the pair of left and right lines. A vehicle periphery display device that displays a vehicle periphery image captured by a camera and two graphics superimposed on a display provided in a vehicle, wherein the two graphics are displayed by the color-blind person A vehicle periphery display device characterized by being colored in mutually different colors so that each of two graphics can be identified. Of the two graphics, one graphic is a fixedly displayed graphic, and the other graphic is a variably displayed graphic. The one graphic and the other graphic The vehicle periphery display device according to claim 5, wherein when the other graphics are variably displayed, they are displayed on the display unit in an overlapping manner. The vehicle periphery display device according to claim 5 or 6, wherein at least a part of the two graphics are displayed on the display unit. A vehicle periphery display device that displays an image of a vehicle periphery photographed by a camera and three graphics superimposed on a display provided in a vehicle, wherein the three graphics are A vehicle periphery display device characterized by being colored in mutually different colors so that each of three graphics can be identified.

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