JP2013069196A - Information presentation device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information presentation device for a vehicle, by which a driver can recognize approach of another vehicle from a rear side direction the driver's own vehicle without visual guidance to a door mirror.SOLUTION: An information presentation device 10 for a vehicle comprises: an other vehicle detection sensor 11 for detecting a relative distance Di; a pattern generation device 14 for generating a visual pattern 20 consisting of a medium time frequency component and a low spatial frequency component; and a presentation display 15 for presenting the visual pattern 20 in a peripheral visual field of the driver. The visual pattern 20 comprises: an own vehicle light-emitting body 21 for showing an own vehicle 1; an other vehicle light-emitting body 22 for showing another vehicle and performing a first movement; and a plurality of intermediate light-emitting bodies 23 arranged between the own vehicle light-emitting body 21 and the other vehicle light-emitting body 22 and performing a second movement. The pattern generation device 14 changes the visual pattern 20 such that the other vehicle light-emitting body 22 moves from the lower side of the own vehicle light-emitting body 21 along a predetermined locus and approaches the side of the own vehicle light-emitting body 21 as the relative distance Di becomes shorter.

Description

  The present invention relates to a vehicular information presentation device that uses a visual pattern that overlooks the positional relationship between a host vehicle and another vehicle to transmit the approach of the other vehicle to the host vehicle to a driver.

  As a guideline for recognizing the degree of danger with other vehicles traveling behind the host vehicle, a technique for lighting or blinking LEDs arranged in a door mirror is known (see, for example, Patent Document 1).

JP 2007-334666 A

  In the above technology, when changing lanes or merging, the driver must move the line of sight from the front of the vehicle to the door mirror and check the positional relationship between the other vehicle displayed on the door mirror and the guideline. There was a problem of not becoming.

  The problem to be solved by the present invention is to provide a vehicle information presentation device that can recognize the approach of another vehicle from the rear side without gazing at the driver's door mirror.

  The present invention comprises a medium temporal frequency component and a low spatial frequency component, and presents a visual pattern overlooking the positional relationship between the host vehicle and the other vehicle in the peripheral vision of the driver, and the relative distance of the other vehicle to the host vehicle is The problem is solved by changing the visual pattern so that the shorter the shorter, the other vehicle light emitters move along a predetermined track from below the vehicle light emitter and approach the side of the vehicle light emitter.

  According to the present invention, a visual pattern that does not include a luminance edge temporally and spatially is presented in the driver's peripheral visual field, and further, the position of other vehicles changes due to a change in the orientation of the visual pattern that can be identified even in peripheral vision. Therefore, the driver can recognize the approach of another vehicle by peripheral vision without being guided by the door mirror.

FIG. 1 is a block diagram showing the overall configuration of a vehicle information presentation device according to an embodiment of the present invention. FIG. 2 is a diagram illustrating an example of a visual pattern displayed on the display in the embodiment of the present invention. FIGS. 3A to 3C are diagrams for explaining the first movement of the other vehicle light emitter of the visual pattern shown in FIG. FIG. 4A to FIG. 4D are overhead views showing an example in which the own vehicle joins the main line. FIG. 5A to FIG. 5D are diagrams showing an example of a screen displayed on the display in the embodiment of the present invention, and are display examples in each scene of FIG. FIG. 6A to FIG. 6D are diagrams showing other examples of visual patterns in the embodiment of the present invention. Fig.7 (a)-FIG.7 (c) are figures which show the example of the screen of the display display which displayed the high spatial frequency pattern superimposedly in embodiment of this invention. FIG. 8 is an overhead view showing an example in which the host vehicle is traveling on a five-lane road. FIG. 9 is a diagram showing a modification of the visual pattern in the embodiment of the present invention, and is a display example in the scene shown in FIG. FIG. 10 is an overhead view showing an example in which the host vehicle is traveling on a five-lane road. FIG. 11 is a diagram showing another modification of the visual pattern in the embodiment of the present invention. FIG. 12 is a view of the passenger compartment as viewed from the driver's seat forward in the embodiment of the present invention. FIG. 13 is a side view around the driver's seat in the embodiment of the present invention. FIG. 14A is a graph showing experimental results when the visual pattern is not presented in the embodiment of the present invention, and FIG. 14B is a graph showing experimental results when the visual pattern is presented.

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

  FIG. 1 is a block diagram showing the overall configuration of a vehicle information presentation device in the present embodiment, FIG. 2 is a diagram showing an example of a visual pattern in the present embodiment, and FIG. 3 is a first motion of another vehicle light emitter in the visual pattern. It is a figure for demonstrating.

  The vehicle information presentation device 10 in the present embodiment is a device that transmits the approach of another vehicle to the own vehicle to the driver using the visual pattern 20 when the own vehicle merges from the merge lane to the main line. As shown in FIG. 1, the vehicle information presentation device 10 includes an other vehicle detection sensor 11, a vehicle speed sensor 12, a TTC calculation device 13, a pattern generation device 14, a display display 15, and a sound effect generation device 16. And.

  The other vehicle detection sensor 11 is constituted by, for example, a laser range finder provided at the rear end of the own vehicle 1, and can detect the distance and direction to the other vehicle existing on the rear side of the own vehicle 1. It is possible. On the other hand, the vehicle speed sensor 12 can detect the speed Vs of the host vehicle 1. These sensors 11 and 12 are connected to a TTC arithmetic device 13 and can output detection results to the TTC arithmetic device 13, respectively. The other vehicle detection sensor 11 may be configured by a millimeter wave radar, a stereo camera, or the like instead of the laser range finder.

  The TTC arithmetic unit 13 is composed of, for example, a computer having a CPU, ROM, RAM, input / output interface, and the like. Based on the detection results of the sensors 11 and 12, the TTC (Time To Contact) The time to reach the vehicle position is calculated.

  Specifically, the TTC arithmetic unit 13 firstly has a distance Di (relative distance (inter-vehicle distance) of the other vehicle to the own vehicle) detected by the other vehicle detection sensor 11 and hereinafter simply referred to as a relative distance Di. .) Is differentiated to calculate the speed Vt of the other vehicle.

  Next, the TTC calculation device 13 determines the TTC (= Di / (Vt−Vs) = [based on the relative distance Di and the speed Vt of the other vehicle and the speed Vs of the host vehicle 1 detected by the speed sensor 12. Relative distance] / [relative speed]), and outputs the relative distance Di and TTC to the pattern generation device 14.

  The pattern generation device 14 is also composed of, for example, a computer having a CPU, ROM, RAM, input / output interface, and the like. Based on the relative distance Di and TTC calculated by the TTC calculation device 13, the vehicle 1 and others A visual pattern 20 is generated that gives an overview of the positional relationship with the vehicle (indicating the positional relationship between the host vehicle 1 and another vehicle as viewed from above). In addition, you may implement | achieve the above-mentioned TTC arithmetic unit 13 and the pattern generation apparatus 14 with the same computer.

  As shown in FIG. 2, the visual pattern 20 includes an own vehicle light emitter 21 indicating the own vehicle 1, an other vehicle light emitter 22 indicating another vehicle, and between the own vehicle light emitter 21 and the other vehicle light emitter 22. And a plurality of intermediate light emitters 23 arranged in the. The visual pattern 20 is composed of a temporal frequency component and a spatial frequency component that do not include a luminance edge, and specifically, a medium temporal frequency of 1 to 7 [Hz] and a low spatial frequency of 1 [cpd] or less. It consists of

  The own vehicle light emitter 21 is arranged in the approximate center of the screen of the display 15 and is composed of one substantially circular stain pattern having a two-dimensional Gaussian luminance distribution.

  Similar to the vehicle light emitter 21, the other vehicle light emitter 22 is also composed of one substantially circular stain pattern having a two-dimensional Gaussian luminance distribution. The other vehicle light emitters 22 have a relatively larger diameter than the vehicle light emitter 21.

  The other vehicle light emitters 22 always perform the first movement as shown in FIGS. 3A to 3C. Specifically, in this embodiment, as the first movement, according to the sine function shown in FIG. 3A, as shown in FIGS. 3B and 3C, the other vehicle light emitters 22 The center CP is continuously position-modulated left and right around a straight line Ly parallel to the Y axis. 3 (b) shows the state of the other vehicle light emitter 22 at the position IIIB in FIG. 3 (a), and FIG. 3 (c) shows the other vehicle light emitter at the position IIIC in FIG. 3 (a). 22 states are shown. As a matter of course, the first movement is performed within a time frequency range (in this example, a medium time frequency of 1 to 7 [Hz]) at which the above-described luminance edge does not occur.

  Note that the position of the other vehicle light emitter 22 may be modulated in accordance with, for example, a Gaussian function instead of the sine function. Further, instead of the straight line Ly, for example, the center CP of the other vehicle light emitter 22 may be position-modulated left and right with the center line of the intermediate light emitter 23 as the center.

  The plurality of intermediate light emitters 23 are each composed of a substantially circular stain pattern having a two-dimensional Gaussian luminance distribution, like the vehicle light emitter 21 and the other vehicle light emitters 22. The intermediate light emitters 23 are arranged at substantially equal intervals between the own vehicle light emitter 21 and the other vehicle light emitter 22, and as they travel from the own vehicle light emitter 21 toward the other vehicle light emitter 22. Its diameter is gradually increasing. Each of the intermediate light emitters 23 has a diameter larger than that of the own vehicle light emitter 21 and smaller than that of the other vehicle light emitters 22. It has a bowl shape having a tail (corresponding to the vehicle light emitter 21) and a tail (corresponding to the other vehicle light emitter 22).

  The plurality of intermediate light emitters 23 always perform a second motion different from the first motion of the other vehicle light emitter 22. Specifically, in the present embodiment, as the second movement, as shown in FIG. 2, the plurality of intermediate light emitters 23 are moved from the other vehicle light emitters 22 toward the own vehicle light emitter 21 at a constant speed. It is moving continuously. When the intermediate light emitter 23 moves from the vicinity of the other vehicle light emitter 22 toward the center, new intermediate light emitters 23 appear in the vicinity of the other vehicle light emitter 22 and the vicinity of the own vehicle light emitter 21. The intermediate illuminant 23 that has moved up to is extinguished sequentially. This second motion is also performed within the range of the time frequency (in this example, the medium time frequency of 1 to 7 [Hz]) at which the above-described luminance edge does not occur.

  Further, in the present embodiment, as shown in FIG. 2, the pattern generation device 14 causes the other vehicle light emitters 22 to move along the elliptical trajectory Tr in accordance with the relative distance Di output from the TTC calculation device 13. The visual pattern 20 is changed.

  The elliptical trajectory Tr is defined by an elliptic function centered on the vehicle light emitter 21. Then, this elliptic function associates the distance in the horizontal direction (X direction) from the own vehicle light emitter 21 (that is, the origin) with the relative distance Di, and as the relative distance Di becomes shorter, the other vehicle light emitters 22 It is set to move from the lower side of the light emitter 21 toward the side. That is, by inputting the relative distance Di to this elliptic function, the position of the other vehicle light emitter 22 in the Y direction on the elliptical trajectory Tr is determined. The elliptic function is set so that the direction from the vehicle light emitter 21 to the other vehicle light emitter 22 substantially matches the actual direction of the other vehicle with respect to the vehicle.

  In the present embodiment, when the relative distance Di is 200 [m], the other vehicle light emitter 22 is positioned directly below the own vehicle light emitter 21, and the other vehicle light emitter 22 becomes the elliptical trajectory Tr as the relative distance Di becomes shorter. When the relative distance Di is 0 [m], the elliptic function is set so that the other vehicle light emitters 22 are located directly beside the vehicle light emitter 21.

  The pattern generation device 14 also changes the inclination of the intermediate light emitter 23 connecting the other vehicle light emitter 22 and the own vehicle light emitter 21 with the movement of the other vehicle light emitter 22 on the elliptical trajectory Tr. . Therefore, as a result, the visual pattern 20 moves like a pendulum around the vehicle light emitter 21 as the relative distance Di changes. The movement of the visual pattern 20 is also performed within a range of a time frequency (in this example, a medium time frequency of 1 to 7 [Hz]) at which the luminance edge does not occur.

  Further, in the present embodiment, the pattern generation device 14 changes the size of the other vehicle light emitters 22 according to the TTC output from the TTC arithmetic device 13, and the other vehicle light emitters 22 and the intermediate light emitters 23. Change the color. Specifically, in this embodiment, as shown in FIG. 2, the diameter of the other vehicle light emitter 22 is increased as the TTC is positive and smaller. Further, as the TTC is more positive and smaller, the other vehicle light emitter 22 is changed from white to yellow, and the range in which the plurality of intermediate light emitters 23 are changed from white to yellow is directed from the other vehicle light emitter 22 toward the center. Spread.

  The colors of the other vehicle light emitters 22 and the intermediate light emitters 23 are kept white until the relative distance Di falls below a predetermined threshold (for example, 100 [m]), and the relative distance Di is larger than the threshold. The color of the other vehicle light emitters 22 and the intermediate light emitters 23 may be made darker as the relative distance Di becomes shorter thereafter.

  Further, the pattern generation device 14 determines the size of the other vehicle light emitter 22 and the other vehicle light emitter based on factors other than TTC (for example, the relative speed (= Vt−Vs) of the other vehicle 51 with respect to the host vehicle 1). The colors of 22 and the intermediate light emitter 23 may be changed.

  In addition, the pattern generation device 14 may change the color of only one of the other vehicle light emitter 22 and the intermediate light emitter 23. Alternatively, the pattern generation device 14 may change not only the size and color of the other vehicle light emitters 22 and the intermediate light emitters 23 but also the shape and brightness of the other vehicle light emitters 22 and the intermediate light emitters 23. Or the pattern production | generation apparatus 14 may change the magnitude | size and speed of at least 1 change of the magnitude | size, shape, color, or brightness | luminance of the other vehicle light-emitting body 22 or the intermediate | middle light-emitting body 23 according to TTC.

  The visual pattern 20 generated by the pattern generation device 14 will be specifically described with reference to FIGS. 4 and 5.

  FIGS. 4A to 4D are overhead views showing an example in which the vehicle 1 traveling on the merge lane 101 merges with the main line 100. FIG. FIGS. 5A to 5D are display examples in the scenes of FIGS. 4A to 4D.

  First, when the own vehicle 1 merges from the merge lane 101 to the main line 100, the other vehicle 50 approaches the own vehicle 1 on the main line 100 without reducing the vehicle speed Vt on the rear side of the own vehicle 1 (FIG. 4). (A) → FIG. 4B → FIG. 4C) will be described.

  In this case, in the scene shown in FIG. 4A, since the relative distance is 200 [m] or more, as shown in FIG. 5A, the other vehicle light emitter 22 emits the own vehicle light on the screen. It is located directly below the body 21.

  As shown in FIG. 4B, when the other vehicle 51 approaches the host vehicle 1 while maintaining the fast vehicle speed Vt, as shown in FIG. 5B, the other vehicle light emitter 22 moves into the elliptical trajectory Tr. The intermediate light emitter 23 tilts and the visual pattern 20 moves like a pendulum around the vehicle light emitter 21. At the same time, as shown in the figure, the other vehicle light emitter 22 becomes larger, and the other vehicle light emitter 22 and the intermediate light emitter 23 change to yellow.

  Furthermore, as shown in FIG. 4 (c), when the other vehicle 51 further approaches the host vehicle 1 while maintaining the vehicle speed Vt, the other vehicle light emitter 22 moves into the elliptical track Tr as shown in FIG. 5 (c). The intermediate light emitter 23 is further tilted while being further elevated along the side of the vehicle light emitter 21, and the other vehicle light emitter 22 is further enlarged.

  On the other hand, when the other vehicle 50 decreases the vehicle speed Vt when the own vehicle 1 joins the main line 100 (FIG. 4 (a) → FIG. 4 (b) → FIG. 4 (d)), As shown in FIG. 5D, the other vehicle light emitter 22 becomes smaller, and the other vehicle light emitter 22 and the intermediate light emitter 23 return from yellow to white.

  The visual pattern is not particularly limited as long as it is composed of a temporal frequency component and a spatial frequency component that do not include a luminance edge. For example, the visual pattern is composed of patterns as shown in FIGS. 6 (a) to 6 (d). May be.

  The modification shown in FIG. 6A is a substantially rectangular stain pattern, the modification shown in FIG. 6B is an elliptic stain pattern, and the modification shown in FIG. 6C is alternately inclined. This is an elliptical stain pattern. If the background is bright, as shown in FIG. 6D, the luminance may be modulated according to the Gabor function with the background luminance as the center. Each pattern is composed of a temporal frequency component and a spatial frequency component that do not include a luminance edge as in the case of the visual pattern 20 described above, specifically, a medium temporal frequency of 1 to 7 [Hz], and 1 It is configured with a low spatial frequency of [cpd] or less.

  In the example shown in FIGS. 6A and 6B, the head and tail cannot be distinguished from each other as compared with the bowl-shaped visual pattern shown in FIG. In the case of being arranged at the corners of this, the same effect as the saddle shape can be obtained. In any of the examples, it is necessary to perform modulation so that the portion constituting the other vehicle light emitter performs the first motion and the portion constituting the intermediate light emitter performs the second motion.

  Further, as shown in FIGS. 7A to 7C, high spatial frequency patterns 24A to 24C composed of high spatial frequency components such as code information such as numbers and icons and scales are added to the visual pattern 20. Also good. Fig.7 (a)-FIG.7 (c) are figures which show the example of the screen which displayed the high spatial frequency component pattern superimposedly in this embodiment.

  In the example shown in FIG. 7A, a high spatial frequency pattern 24 </ b> A indicating a scale in which the position of the other vehicle light emitter 22 in the Y direction is associated with the actual relative distance Di is added to the visual pattern 20. Accordingly, the driver can recognize an accurate distance that cannot be obtained by the visual pattern 20 alone.

  In the example shown in FIGS. 7B and 7C, high spatial frequency patterns 24B and 24C indicating characters and exclamation marks indicating that other vehicles are approaching are added to the visual pattern 20. doing. Accordingly, it is possible to actively warn the driver that another vehicle is approaching the host vehicle 1. Note that the high spatial frequency patterns 24B and 24C shown in FIGS. 7B and 7C may be blinked.

  Moreover, as shown in FIG. 9, the approach of the other vehicles 51 and 52 in the lane change on the road of three or more lanes may be transmitted to the driver by making the elliptical tracks Tr1 and Tr2 double. FIG. 8 is a bird's-eye view showing an example in which the vehicle is traveling on a five-lane road, and FIG. 9 is a display example in the scene shown in FIG.

  The first elliptical track Tr1 in FIG. 9 corresponds to the left and right lanes 112, 114 adjacent to the lane 113 in which the vehicle 1 shown in FIG. On the other hand, the second elliptical track Tr2 in FIG. 9 corresponds to the lanes 111 and 115 located further outside the lanes 112 and 114 in FIG. Also in this example, the elliptical trajectories Tr1 and Tr2 are defined by elliptic functions centered on the vehicle light emitter 21. Each elliptic function associates the distance in the horizontal direction (X direction) from the own vehicle light emitter 21 with the relative distances Di1 and Di2, and the other vehicles 22A and 22B have their own vehicles as the relative distances Di1 and Di2 become shorter. It is set to move from the lower side of the light emitter 21 toward the side.

  For example, as shown in FIG. 8, when other vehicles 51 and 52 are traveling in lanes 112 and 114 adjacent to the lane 113 behind the host vehicle 1 traveling in the center lane 113, FIG. As shown, the other vehicle light emitter 23A of the first visual pattern 20A indicating the first other vehicle 51 moves on the first elliptical trajectory Tr1, and the same first elliptical trajectory Tr1 moves on the first elliptical trajectory Tr1. The other vehicle light emitter 23B of the second visual pattern 20B indicating the two other vehicles 52 moves.

  In this example, the other vehicle light emitters 23A and 23B are based on, for example, position information (positioning data) received from a GPS (Global Positioning System) satellite, the direction of the other vehicle detected by the other vehicle detection sensor 11, and the like. Which elliptical trajectory Tr1 or Tr2 is located is determined. Therefore, when the other vehicles 51 and 52 change lanes, the other vehicle light emitters 23A and 23B move between the first elliptical track Tr1 and the second elliptical track Tr2.

  In this example, it is not necessary to display all other vehicles around the own vehicle by a visual pattern. For example, only other vehicles existing within 200 [m] behind may be displayed, or only other vehicles traveling in the lane change destination indicated by the blinker operation or the like may be displayed.

  Further, the trajectory along which the other vehicle light emitters 22 of the visual pattern 20 move is not particularly limited to the elliptical trajectory. For example, in the example shown in FIG. 11, a Gaussian orbit defined by a Gaussian function is employed instead of the elliptical orbit. FIG. 10 is a bird's-eye view showing an example in which the vehicle is traveling on a five-lane road, and FIG. 11 is a display example in the scene shown in FIG.

  The first to fourth Gaussian tracks Tr3 to Tr6 in FIG. 11 correspond to lanes 111, 112, 114, 115 other than the lane 113 in which the vehicle 1 shown in FIG. The Gaussian trajectories Tr3 to Tr6 are respectively defined by Gaussian functions centered on the vehicle light emitter 21. Each Gaussian function associates the distance in the vertical direction (Y direction) from the vehicle light emitter 21 with the relative distance DiL along the front-rear direction of the vehicle, and the other vehicles 22A and 22B become smaller as the relative distance DiL becomes shorter. Is set to move from the lower side of the vehicle light emitter 21 toward the side. That is, by inputting the relative distance DiL to the corresponding Gaussian function, the position of the other vehicle light emitter 23C in the X direction on the Gaussian trajectories Tr3 to Tr6 is determined.

  For example, as shown in FIG. 10, when the other vehicle 51 is traveling in the right outer lane 111 behind the host vehicle 1 traveling in the center lane 113, as shown in FIG. The other vehicle light emitter 22C of the visual pattern 20C indicating the other vehicle 51 moves on the Gaussian track Tr3.

  Also in this example, for example, the other vehicle light emitters 23C can detect which Gaussian orbit based on the position information (positioning data) received from the GPS satellite, the direction of the other vehicle detected by the other vehicle detection sensor 11, and the like. It is determined whether it is located on Tr3 to Tr6.

  FIG. 12 is a view of the passenger compartment in the present embodiment as viewed from the front of the driver's seat, and FIG. 13 is a side view around the driver's seat in the present embodiment.

  As described above, the visual pattern 20 generated by the pattern generation device 14 includes, for example, a liquid crystal monitor or an organic EL monitor, and is displayed on the display 15 provided in the vehicle interior. In this embodiment, the display 15 is provided on the cluster lid 5 that covers the combination meter 4 so as to face the driver 30 as shown in FIG. In addition, the installation position of the display 15 is not limited to the front of the driver, and may be right front or left front of the driver.

The display display 15, in the visual field of the driver 30 in normal position looking ahead of the own vehicle 1 is installed in a range of more than eccentric angle 10 degrees from the line of sight L ₁ which is the center. In the present embodiment, as shown in FIG. 13, the display displaying 15 is installed in a range of eccentric angle 10-20 ° downward from the line of sight L _1. Thus, in this embodiment, since the display display 15 is arrange | positioned in a driver | operator's peripheral visual field, it does not affect the driver | operator's 30 visual recognition.

  The standard posture in the present embodiment refers to a state in which the driver 30 sits deep on the seat 2 so that there is no gap between the waist and back and the driver seat 2 and the brake pedal is fully depressed, Align the seat 2 at a position with a little margin without stretching, and with the seat 2 on the back, keep the backrest at an angle with a little margin on the elbows of the arms that held the top of the steering wheel 3 It is a combined posture.

  In the present embodiment, the pattern generation device 14 outputs a signal indicating the relative distance Di and TTC to the sound effect generation device 16 simultaneously with outputting the visual pattern 20 to the display 15.

  The sound effect generating device 16 receives the output signal from the pattern generating device 14, and synchronizes the sound effect such as the traveling sound of another vehicle approaching from the rear side with the change in the direction of the visual pattern 20, for example. In synchronism with changes in the size and color of the vehicle light emitter 22 and the intermediate light emitter 23, the sound is processed three-dimensionally through the speakers 161 and 162. For example, the sound effect may be output only when another vehicle comes closest to the own vehicle.

  Thereby, since the redundancy of the information transmitted to a driver | operator increases, the transmission accuracy of information can be improved. In order to output the traveling sound three-dimensionally by sound field processing, as shown in FIG. 12, at least two speakers 161 and 162 are arranged on the left and right with the driver as the center.

  As described above, in the present invention, the visual pattern 20 comprising the medium time frequency component and the low spatial frequency component and overlooking the positional relationship between the host vehicle 1 and the other vehicle 51 is presented in the peripheral vision of the driver 30, As the relative distance Di of the other vehicle 51 with respect to the own vehicle 1 becomes shorter, the other vehicle light emitter 22 moves along the elliptical or Gaussian orbit from below the own vehicle light emitter 21 and approaches the side of the own vehicle light emitter 21. Thus, the visual pattern 20 is changed.

  For this reason, in the present embodiment, the visual pattern 20 that does not include a luminance edge temporally and spatially is presented in the driver's peripheral visual field, and further, by the change in the orientation of the visual pattern 20 that can be identified by peripheral vision, Since the position change of the other vehicle 51 can be grasped, the driver can recognize the approach of the other vehicle by peripheral vision without being guided to the door mirror.

  In the present embodiment, in the visual pattern 20, the other vehicle light emitter 22 performs the first motion and the intermediate light emitter 23 performs the second motion different from the first motion. The other vehicle light emitters 22 and the intermediate light emitters 23 can be identified by visual observation, and the orientation of the visual pattern 20 can be easily grasped.

  In the present embodiment, at least one of the size, shape, color, or luminance of at least one of the other vehicle light emitters or the intermediate light emitters is continuously changed according to at least the relative speed, or the other vehicle At least one of the magnitude or speed of at least one change in the size, shape, color, or luminance of at least one of the light emitter and the intermediate light emitter is changed. This makes it easier for the driver to visually recognize the visual pattern 20 in peripheral vision.

  In particular, in the present embodiment, the size of the other vehicle light emitter 22 is changed or the colors of the other vehicle light emitter 22 and the intermediate light emitter 23 are changed according to TTC. For this reason, the driver can perceive the change in the size of the stain pattern representing the other vehicle and the change in the area of the yellow area by peripheral vision, so that the driver enters either the front or the rear of the other vehicle in a merged scene or the like. Can be appropriately determined.

  In addition, by changing the colors of the other vehicle light emitters 22 and the intermediate light emitters 23 according to TTC, a driver who is difficult to discriminate colors can recognize the approach of the other vehicles to the own vehicle.

  In the present embodiment, the visual pattern 20 is presented in a range of 10 degrees or more from the central visual field in the driver's visual field, so that the driver can grasp the visual pattern 20 by peripheral vision.

  In the embodiment, the direction of the other vehicle light emitter 22 with respect to the host vehicle light emitter 21 on the screen of the display display 15 substantially matches the actual direction of the other vehicle 51 with respect to the host vehicle 1. The direction of the other vehicle light emitter 22 with respect to the own vehicle light emitter 21 indicates the actual direction of the other vehicle 51 with respect to the own vehicle 1. For this reason, the driver can intuitively grasp the position of the other vehicle 51 approaching the host vehicle 1.

  Here, specific effects of the present embodiment will be described with reference to FIGS. 14 (a) and 14 (b). FIG. 14A is a graph showing experimental results when the visual pattern is not presented in this embodiment, and FIG. 14B is a graph showing experimental results when the visual pattern is presented.

  In this experiment, a merging scene is set on the driving simulator, (1) when the visual pattern is not presented to the driver (FIG. 14A), and (2) the visual pattern of the present embodiment is presented to the driver. In the case of presenting (FIG. 14B), it was investigated how the driver's judgment changes.

  Note that “GO” and “NOGO” in FIGS. 14 (a) and 14 (b) mean the driver's judgment at the time of merging, and “GO” is a judgment to enter in front of another vehicle. NOGO ”is a determination to enter behind the other vehicle. In the figure, the horizontal axis represents TTC, the vertical axis represents THW (Time HeadWay (= relative distance Di / other vehicle speed Vt)), and the auxiliary line represents RF (Risk Feeling: danger sensation (= 1 / THW + 5). / TTC)). This RF increases as TTC and THW are shorter.

  As shown in the figure, by presenting the visual pattern of the present embodiment, NOGO judgment is made with a lower RF value (5/8 people (arrow a in FIG. 14A)). 6/8 people (arrow b in FIG. 14 (a)) that GO determination is made with a lower RF value, and there is a large difference between RF values for NOGO determination and GO determination. The number was 5/8 (c arrow in FIG. 14A). From this experimental result, it was found that an appropriate action selection can be made by presenting the visual pattern of the present embodiment.

  The other vehicle detection sensor 11 in the present embodiment corresponds to an example of the other vehicle detection means in the present invention, and the pattern generation device 14 in the present embodiment corresponds to an example of the pattern generation means in the present invention. The display 15 corresponds to an example of the presenting means in the present invention, and the sound effect generating device 16 in the present embodiment corresponds to an example of the sound effect generating means in the present invention.

  The embodiment described above is described for facilitating the understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Own vehicle 10 ... Vehicle information presentation apparatus 11 ... Other vehicle detection sensor 12 ... Vehicle speed sensor 13 ... TTC calculating device 14 ... Pattern generation apparatus 15 ... Display display 16 ... Sound effect generation apparatus 161, 162 ... Speaker 20 ... Visual pattern DESCRIPTION OF SYMBOLS 21 ... Own vehicle light emitter 22 ... Other vehicle light emitter 23 ... Intermediate light emitter 30 ... Driver 51, 52 ... Other vehicle 100 ... Main line 101 ... Merge lane 111-115 ... First to fifth lanes

Claims (6)

An information presentation device for a vehicle for transmitting the approach of another vehicle to the vehicle to the driver,
Other vehicle detection means for detecting at least a relative distance of the other vehicle with respect to the own vehicle;
A pattern generation unit that includes a medium time frequency component and a low spatial frequency component, and overlooks the positional relationship between the host vehicle and the other vehicle, and generates a visual pattern that changes based on a detection result of the other vehicle detection unit; ,
Presenting means for presenting the visual pattern in the peripheral vision of the driver,
The visual pattern is
A vehicle light emitter indicating the vehicle;
An other vehicle light emitter for indicating the other vehicle and performing the first movement;
A plurality of intermediate light emitters arranged side by side between the host vehicle light emitter and the other vehicle light emitter and performing a second motion different from the first motion,
As the relative distance becomes shorter, the pattern generating means moves the other vehicle light emitter along a predetermined track from below the own vehicle light emitter on the screen of the presenting means, and moves to the side of the own vehicle light emitter. An information presentation device for a vehicle, wherein the visual pattern is changed so that The vehicle information presentation device according to claim 1,
The vehicle information presentation device, wherein the predetermined trajectory includes an elliptical trajectory defined by an elliptic function or a Gaussian trajectory defined by a Gaussian function. The vehicle information presentation device according to claim 1 or 2,
The other vehicle detection means detects a relative speed of the other vehicle with respect to the own vehicle,
The pattern generation means includes
Continuously changing at least one of the size, shape, color, or luminance of at least one of the other vehicle light emitter or the intermediate light emitter based on at least the relative speed, or
Changing at least one of the magnitude or speed of at least one of the size, shape, color, or luminance of at least one of the other vehicle light emitter or the intermediate light emitter based on at least the relative speed. A vehicle information presentation device. The vehicle information presentation device according to any one of claims 1 to 3,
The driver's peripheral vision is in the range of 10 degrees or more from the central viewpoint in the driver's field of view,
An information presentation device for vehicles, wherein the direction of the other vehicle light emitter relative to the host vehicle light emitter on the screen of the presenting means indicates the direction of the other vehicle relative to the host vehicle. The vehicle information presentation device according to any one of claims 1 to 4,
An information presentation apparatus for a vehicle, comprising sound effect generating means for generating a sound effect synchronized with a change in the visual pattern. The vehicle information presentation device according to any one of claims 1 to 5,
The vehicle presenting apparatus, wherein the presenting means displays a pattern composed of a high spatial frequency component in addition to the visual pattern.