JP2016182892A - On-vehicle display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent erroneous recognition as much as possible and reduce a manufacturing cost with a configuration to detect a pedestrian and display an icon.SOLUTION: An on-vehicle display device includes: a communication device (2) communicating with a portable communication terminal (7) possessed by a pedestrian; a calculation section (3) for calculating the direction of the pedestrian and a distance between the pedestrian and a vehicle on the basis of positional information of the portable communication terminal (7) received by the communication device (2) and present position information on the vehicle; a position color setting section (3) for setting a display position and a display color of an icon according to the direction of the pedestrian; a size setting section (3) for setting the size of the icon according to the distance; and a display section (3) for displaying the icon on a display screen (4) by the set display position, display color and size.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an in-vehicle display device that detects a pedestrian around a vehicle and displays a warning icon indicating the detected pedestrian.

  In recent years, there is a desire to prevent traffic accidents caused by oversight of pedestrians in blind spot positions of drivers, such as shadows, and pedestrians jumping out. In response to such a demand, a display device described in Patent Document 1 is considered. In this display device, an object such as a pedestrian is detected by a stereo camera mounted on the vehicle, a warning icon indicating the detected object is positioned in the detected direction, and the near one is large, The distant object is made smaller and displayed on the head-up display.

JP 2001-23091 A

  However, in the case of the above display device, there is a drawback that it is not possible to detect a pedestrian at the blind spot position of the stereo camera (for example, behind a building or a vehicle). For example, when a pedestrian on the left hand side of a road is detected while traveling on a right curve with a strong curvature, a warning icon is displayed on the right side of the head-up display when the pedestrian is far away. For this reason, there is a problem that the driver misrecognizes that there is a pedestrian on the right side of the road (the same problem occurs with a left curve with a strong curvature). Furthermore, since a stereo camera must be installed, there is a problem that the manufacturing cost increases.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an in-vehicle display device that can prevent erroneous recognition as much as possible and can reduce the manufacturing cost while detecting a pedestrian and displaying an icon.

  The invention of claim 1 is directed to a communication device that communicates with a mobile communication terminal possessed by a pedestrian, and the direction of the pedestrian based on the location information of the mobile communication terminal and the current location information of the vehicle received by the communication device. And a calculation unit that calculates a distance between the pedestrian and the vehicle, a position color setting unit that sets a display position and a display color of an icon according to the direction of the pedestrian, and the icon according to the distance It is a vehicle-mounted display apparatus provided with the size setting part which sets the size of this, and the display part which displays the said icon on a display screen by the set display position, display color, and size.

The block diagram of the vehicle-mounted display apparatus which shows 1st Embodiment of this invention. Flow chart of pedestrian detection display control The figure explaining the direction and distance of a pedestrian The figure which shows the relationship between a pedestrian's direction, a display position, and a display color as a table Figure showing an example of the display screen A chart showing the relationship between distance and icon size The figure which shows the change of the relative position of the pedestrian with the progress of the vehicle The figure which shows the change of the display position of the icon corresponding to the change of the relative position of a pedestrian with advancing of a vehicle. The figure which shows the example in which two pedestrians are detected in substantially the same direction The figure which shows the example of a display of the icon corresponding when two pedestrians are detected in the substantially same direction. The figure which shows 2nd Embodiment of this invention and is a figure explaining the example in which a pedestrian is detected behind the vehicle. The figure which shows the relationship between a pedestrian's direction, a display position, and a display color as a table | surface when a pedestrian is detected behind a vehicle. The figure which shows the relationship between distance and the size of an icon in a table | surface when a pedestrian is detected behind a vehicle. The figure which shows an example of a display screen, when a pedestrian is detected behind the vehicle

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram schematically showing the overall configuration of the in-vehicle display device 1 of the present embodiment. As shown in FIG. 1, the in-vehicle display device 1 includes a communication device 2, an image display processing device 3, a display screen 4, and a vehicle position detector 5.

  The communication device 2 is composed of a wireless communication terminal, and is a portable communication terminal possessed by a pedestrian in the vicinity of the vehicle (particularly in the front and side) via a wireless communication base station such as a mobile phone, the network 6 and the like. 7 has a function of performing communication with. The mobile communication terminal 7 is composed of, for example, a smart phone or a mobile phone, and has a function of detecting the current position of the pedestrian (mobile communication terminal 7).

  The image display processing device 3 communicates with the pedestrian's mobile communication terminal 7 via the communication device 2 to receive a detection signal of the pedestrian's current position, a detection signal of the pedestrian's current position, and the current vehicle status. A function for calculating the distance and direction from the pedestrian based on the position detection signal, and a display icon for the pedestrian with a display position, display color, and icon size corresponding to the distance and direction from the pedestrian. It has a function to display. The display screen 4 is configured by a part of a vehicle windshield (for example, a portion near the dashboard of the driver's seat), a transparent plate (for example, a plastic plate) disposed on the dashboard of the driver's seat, or the like. . The display screen 4 and the image display processing device 3 constitute a HUD (Head Up Display). The image display processing device 3 has functions as a calculation unit, a position color setting unit, a size setting unit, and a display unit.

  The vehicle position detector 5 includes, for example, a GPS (Global Positioning System) receiver, a geomagnetic sensor, a vehicle speed sensor, and the like, detects the current position of the vehicle and the traveling direction of the vehicle, and detects these detection signals (current position information of the vehicle and Vehicle traveling direction information) is transmitted to the image display processing device 3. The vehicle position detector 5 is stopped, and the vehicle navigation device mounted on the vehicle is configured to output detection signals for the current position of the vehicle and the traveling direction of the vehicle. You may comprise so that it may give to the image display processing apparatus 3 from a car navigation apparatus.

  Next, the operation of the in-vehicle display device 1 having the above configuration will be described with reference to FIGS. Note that the flowchart of FIG. 2 shows the contents of control of the image display processing device 3. First, in step S10, the image display processing device 3 communicates with the mobile communication terminal 7 of one or more pedestrians around the vehicle (particularly in front and side) via the communication device 2, and each walk A detection signal of the current position of the person is received. Subsequently, the process proceeds to step S20, and whether or not a pedestrian is detected within a predetermined distance from the vehicle based on the detection signal of the current position of each pedestrian and the detection signal of the current position of the vehicle (is there a pedestrian? Or not). In the case of traveling in a normal town (city), the predetermined distance may be appropriately set to a distance of several tens to 100 m.

  In step S20, when no pedestrian is detected within a predetermined distance (“NO”), this process is terminated. The processing of the image display processing device 3 (the flowchart in FIG. 2) is configured to be executed, for example, every several hundred mm seconds (several times per second).

  On the other hand, in step S20, when one or more pedestrians are detected within a predetermined distance (“YES”), the process proceeds to step S30, and for each detected pedestrian, the relative position of the pedestrian and the vehicle and the pedestrian are determined. And the direction of the pedestrian as viewed from the vehicle. In this case, as shown in FIG. 3, the traveling direction A of the vehicle 8 is set to 0 °, and the traveling direction A of the vehicle 8 is determined based on the detection signal of the current position of the pedestrian and the detection signal of the current position of the vehicle. The relative angle θ formed by the direction B where the pedestrian 9 is located is calculated as the direction of the pedestrian as viewed from the vehicle. Based on the detection signal of the current position of the pedestrian and the detection signal of the current position of the vehicle, the distance L between the position P of the vehicle 8 and the position Q of the mobile communication terminal 7 of the pedestrian is calculated as The distance L is calculated.

  Then, it progresses to step S40 and it is judged whether the number of detected pedestrians is below a predetermined number (for example, 2 persons). If the detected number of pedestrians is equal to or less than the predetermined number (“YES”), the process proceeds to step S50, and the display position and display color corresponding to the pedestrian direction (relative angle θ) are determined. In this case, as shown in the table of FIG. 4, when the relative angle θ is, for example, −90 ° or more and less than −45 ° (see the angle range R1 in FIG. 3), the display position a (see FIG. 5) is displayed. ) The icon (inverted triangle) is displayed in red. When the relative angle θ is, for example, −45 ° or more and less than −15 ° (see the angle range R2 in FIG. 3), the icon (inverted triangle) is displayed in orange at the display position b (see FIG. 5) on the display screen 4. indicate.

  When the relative angle θ is not less than −15 ° and less than 15 ° (see angle range R3 in FIG. 3), an icon (inverted triangle) is displayed in orange at the display position c (see FIG. 5) on the display screen 4. To do. When the relative angle θ is not less than 15 ° and less than 45 °, for example (see angle range R4 in FIG. 3), an icon (inverted triangle) is displayed in orange at the display position d (see FIG. 5) on the display screen 4. . When the relative angle θ is, for example, not less than 45 ° and less than 90 ° (see angle range R5 in FIG. 3), an icon (inverted triangle) is displayed in red at the display position e (see FIG. 5) on the display screen 4.

  Subsequently, it progresses to step S60 and the icon size according to the distance L of a vehicle and a pedestrian is determined. In this case, as shown in the table of FIG. 6, when the distance L is less than 10 m, for example, the icon is a large inverted triangle, and when the distance L is, for example, 10 m or more and less than 30 m, the icon is reversed to a medium size. When the distance L is 30 m or more and less than 100 m, for example, the icon is a small inverted triangle.

  Subsequently, the process proceeds to step S70, and the number of icons corresponding to the detected number of pedestrians is displayed on the display screen 4 in the determined position and size. In this case, when the display positions of the plurality of icons are the same, only one large size icon (corresponding to the pedestrian with the smallest distance L) is displayed. Thereby, the processing of the image display processing device 3 is ended.

  In step S40, when the number of detected pedestrians is not less than or equal to the predetermined number ("NO"), the process proceeds to step S80, and it is determined whether or not pedestrians are detected in a direction equal to or greater than the predetermined number (for example, 4). To do. Here, when the pedestrians are not detected in a predetermined number or more (that is, the detected direction is 3 or less, for example) (“NO” in step S80), the process proceeds to step S50, and each of the processes described above is performed. Execute.

  On the other hand, when a pedestrian is detected in a predetermined number of directions or more in step S80 ("YES"), the process proceeds to step S90, and the distance L of the nearest pedestrian (that is, the pedestrian closest to the vehicle) is determined. The icon size (see FIG. 6) is determined. Subsequently, the process proceeds to step S100, and all the five icons corresponding to all the positions (five positions a to e) are displayed on the display screen 4 with the determined size (icon full display control). In this case, the display color of each icon is determined by the display positions (ae) on the display screen 4 (see FIG. 4). Thereby, the processing of the image display processing device 3 is ended.

  Here, an example of control for detecting a pedestrian and displaying it on the display screen 4 will be described with reference to FIGS. 7 and 8. First, as shown in FIG. 7, when the pedestrian 9 is detected at the position T1 while the vehicle 8 is traveling on the right curve with a strong curvature, the relative pedestrian 9 moves as the vehicle 8 travels forward. The target position moves to position T2, position T3, and position T4. As a result, when the pedestrian is at the position T1, a small icon is displayed in orange at the position d on the display screen 4 as shown in FIG. Then, when the relative position of the pedestrian moves to the position T2, the position T3, and the position T4, the display screen 4 is displayed as shown in FIGS. 8B, 8C, and 8D. An icon is displayed. In the case of FIGS. 8B and 8C, the medium size icon is displayed in orange, and in the case of FIG. 8D, the large size icon is displayed in red.

  Next, another example of control for detecting a pedestrian and displaying it on the display screen 4 will be described with reference to FIGS. 9 and 10. In this example, as shown in FIG. 9, there are two pedestrians 9 in substantially the same direction, that is, a case where the pedestrians 9 are at positions T5 and T6. In this case, as shown in FIG. 10, only the medium-sized icon corresponding to the pedestrian 9 (the pedestrian 9 at the position T5) with the shorter distance L of the two persons is the position on the display screen 4. e is displayed in red.

  In the present embodiment configured as described above, the communication with the mobile communication terminal 7 possessed by the pedestrian and the direction of the pedestrian 9 based on the received position information of the mobile communication terminal 7 and the current position information of the vehicle 8 and A distance L between the pedestrian 9 and the vehicle 8 was calculated. And while setting the display position and display color of the icon according to the direction of the pedestrian 9, the size of the icon according to the distance L is set, and the icon is displayed with the set display position, display color and size. In order to prevent the erroneous recognition of the position of the pedestrian as much as possible by the display position and display color of the icon and the size of the icon. it can. Furthermore, as the communication device 2 that communicates with the mobile communication terminal 7 possessed by a pedestrian, a wireless communication terminal that is often mounted on the vehicle 8 can be used in recent years, so that the manufacturing cost can be reduced.

  Further, in the above embodiment, when the icon is displayed on both ends (positions a and e) of the display screen 4, the icon is displayed on both ends (positions a and e) of the display screen 4 because the icon is displayed in red. If the icon is small, it can be seen that the pedestrian may be on the other side of the road, contrary to the appearance.

  Moreover, in the said embodiment, since it comprised so that an icon might be displayed only about the pedestrian detected within the predetermined distance from the vehicle, it can prevent displaying the icon of the pedestrian far away from the vehicle. .

  In the above embodiment, when the number of detected pedestrians is greater than the predetermined number, or when the number of detected pedestrian directions is greater than the predetermined number, all positions (position a , B, c, d, and e) are configured to display icons, so that the number of detected pedestrians and the number of detected pedestrian directions are large due to the display of all positions on the display screen 4. It is easy to see that there are many. In addition, in a situation where many pedestrians are detected around the vehicle, the display content of the icon may change frequently, and there is a risk that the display content may be troublesome for the driver. Annoying display can be prevented.

  In the first embodiment, the size of the icon is changed to three levels. However, the icon size may be changed to four or more levels. Further, although five positions for displaying icons on the display screen 4 are provided, three, four, or six or more positions may be provided. In the first embodiment, the icon display colors are displayed in orange and red. However, the icons are displayed in other colors, blinked, and the display color is changed at a set cycle. It may be configured.

  11 to 14 show a second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same structure as 1st Embodiment. In the second embodiment, when the vehicle is backed, a pedestrian behind the vehicle is detected and an icon is displayed on the display screen 4.

  Specifically, after detecting a pedestrian behind the vehicle in the same manner as in the first embodiment, as shown in FIG. 11, the forward direction D of the vehicle 8 is set to 0 °, and the pedestrian The relative angle θR formed by the traveling direction D of the vehicle 8 and the direction E of the pedestrian 9 is calculated as the direction of the pedestrian as viewed from the vehicle based on the current position detection signal and the vehicle current position detection signal. To do. Then, based on the detection signal of the current position of the pedestrian and the detection signal of the current position of the vehicle, the distance LR between the position P of the vehicle 8 and the position Q of the mobile communication terminal 7 of the pedestrian 9 is determined as the distance between the vehicle and the pedestrian. It is calculated as the distance.

  Next, as shown in the table of FIG. 12, when the relative angle θR is, for example, −90 ° or more and less than −45 ° (see the angle range RR1 in FIG. 11), the display position a (see FIG. 14) on the display screen 4. An icon (inverted triangle) is displayed in yellow, for example. When the relative angle θ is, for example, −45 ° or more and less than 45 ° (see the angle range RR2 in FIG. 11), an icon (inverted triangle) is blinked in red, for example, at the display position c (see FIG. 14) on the display screen 4. indicate. When the relative angle θ is, for example, not less than 45 ° and less than 90 ° (see angle range RR3 in FIG. 11), an icon (inverted triangle) is displayed, for example, in yellow at the display position e (see FIG. 14) on the display screen 4. .

  Furthermore, as shown in the table of FIG. 13, when the distance LR between the vehicle and the pedestrian is less than 10 m, for example, the icon is a large inverted triangle, and when the distance LR is, for example, 10 m or more and less than 30 m, the icon is a small inverse. Let it be a triangle. Further, as shown in FIG. 14, when the detected pedestrian icon is displayed when the vehicle backs up, a message of “rear pedestrian attention” is displayed on the display screen 4.

  The configuration of the second embodiment other than that described above is the same as the configuration of the first embodiment. Therefore, in the second embodiment, substantially the same operational effects as in the first embodiment can be obtained. In particular, according to the second embodiment, when the vehicle is turned back, a pedestrian behind the vehicle is detected and its icon is displayed on the display screen 4, so that safety is further enhanced. can do.

  In the second embodiment, the size of the icon is changed to two levels. However, the icon size may be changed to three or more levels. In addition, although three positions for displaying icons on the display screen 4 are provided, four or more positions may be provided.

  In each of the above-described embodiments, the upper part of the dashboard on the driver's seat side of the front glass of the vehicle is configured to display the detected pedestrian icon on the HUD with the display screen 4, but the present invention is not limited to this. Instead, the detected pedestrian icon may be displayed on a meter display, a windshield display, or the like.

  In each of the above embodiments, the position, size, and color of the icon are set based on the detected position information of the pedestrian. However, the present invention is not limited to this, and the detected position information of the pedestrian In addition, the position, size, and color of the icon may be set based on information including vehicle speed information and map information (information such as road type and road shape). In this configuration, it is preferable to include an information acquisition unit that acquires vehicle speed information and road type information (that is, map information). When configured in this manner, for example, when the vehicle is traveling on a highway or a main road and the vehicle speed is 80 km / h or higher, for example, the detected pedestrian icon (warning) can be controlled not to be displayed. For example, when making a right turn or a left turn at an intersection, the detected pedestrian icon can be displayed so as to blink. Further, for example, the vehicle information is configured to include an information acquisition unit that acquires information indicating each operation state of the turn signal of the right turn and the left turn, and based on the information indicating the operation state of the turn signal, the vehicle turns right or left at the intersection. It is good also as a structure which displays so that the icon of the detected pedestrian may blink when making a right turn or a left turn at the intersection. Furthermore, it may be configured to determine whether the vehicle turns right or left at the intersection based on the map information and information indicating the operating state of the winker. In addition, vehicle speed information or the like may be further added to the map information and information indicating the operating state of the winker (vehicle information) to determine whether the vehicle is turning right or left at the intersection.

  In each of the above embodiments, it is configured to detect whether or not there is a pedestrian within a distance of several tens to 100 m from the vehicle. However, the vehicle speed is, for example, 80 km while traveling on a highway or a main road. / H or more, it is configured to detect whether or not there is a pedestrian within a distance of several tens of meters to several hundreds of meters from the vehicle, and the numerical value of the distance L in the table of FIG. preferable.

  Further, in each of the above embodiments, the detected pedestrian is configured to be displayed on the display screen 4 as an icon. However, in addition to displaying the icon, a message is displayed or a voice message is output. You may comprise.

  In each of the above embodiments, a well-known stereo camera (see, for example, Patent Document 1) is mounted, and a pedestrian is detected by data processing of an image captured by the stereo camera, and the detected pedestrian icon is displayed in each of the above embodiments. It may be configured to display on the display screen 4 in the same manner as the embodiment. That is, a configuration for detecting a pedestrian with a stereo camera and a configuration for detecting a pedestrian by communicating with the mobile communication terminal 7 of the pedestrian may coexist.

  In each of the above embodiments, a smart phone, a mobile phone, or the like is used as the mobile communication terminal 7. However, the present invention is not limited to this. For example, an RF (Radio Frequency) tag or the like may be used. In the case of a configuration using an RF tag, it is preferable to distribute the RF tag to an elderly person or a child.

  In the drawings, 1 is an in-vehicle display device, 2 is a communication device, 3 is an image display processing device (calculation unit, position color setting unit, size setting unit, display unit), 4 is a display screen, 5 is a vehicle position detector, 7 is a portable communication terminal, 8 is a vehicle, and 9 is a pedestrian.

Claims (7)

A communication device (2) communicating with a mobile communication terminal (7) possessed by a pedestrian;
Calculation for calculating the direction of the pedestrian and the distance between the pedestrian and the vehicle based on the position information of the mobile communication terminal (7) received by the communication device (2) and the current position information of the vehicle. Part (3),
A position color setting unit (3) for setting the display position and display color of the icon according to the direction of the pedestrian,
A size setting unit (3) for setting the size of the icon according to the distance;
A vehicle-mounted display device comprising: a display unit (3) for displaying the icon on the display screen (4) with a set display position, display color and size. A detection determination unit (3) for determining whether or not the pedestrian is detected within a predetermined distance from the vehicle;
The display position, display color, and size of the icon are set for the pedestrian detected within the predetermined distance, and the icon is displayed on the display screen (4). In-vehicle display device. A number determination unit (3) for determining whether the number of detected pedestrians is equal to or less than a predetermined number;
The on-vehicle device according to claim 1, wherein when the detected number of pedestrians is equal to or less than a predetermined number, the icon is displayed on the display screen (4) according to the detected number and directions of the pedestrians. Display device. A direction number determination unit (3) for determining whether or not the detected pedestrian direction is equal to or greater than a predetermined number;
When the detected number of pedestrians exceeds a predetermined number and the detected number of pedestrians is a predetermined number or more, icons corresponding to all positions are displayed on the display screen (4). The in-vehicle display device according to claim 3.   When the vehicle travels backward, a pedestrian behind the vehicle is detected, the display position, display color and size of the icon are set for the detected pedestrian, and the icon is displayed on the display screen (4). The vehicle-mounted display device according to claim 1, wherein the display is displayed on the vehicle. It has an information acquisition unit that acquires vehicle speed information and road type information,
2. The in-vehicle display device according to claim 1, wherein when the vehicle is traveling on a highway or a main road and the vehicle speed is, for example, 80 km / h or higher, the detected pedestrian icon is not displayed. . It has an information acquisition unit that acquires map information or vehicle information,
2. The in-vehicle display device according to claim 1, wherein when the vehicle turns right or left at an intersection, the detected pedestrian icon is displayed in a blinking manner.

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