JP5720555B2 - Display system, display method, and display program - Google Patents

Description

  The present invention relates to a display system, a display method, and a display program.

  In recent years, as a vehicle-mounted navigation device, only the recommended lane display color is selected from the multiple lanes displayed on the screen in order to guide the driver to the recommended lane that is most suitable for traveling to the destination. It has been proposed to change the display color of other lanes (for example, paragraph 0059 of Patent Document 1).

JP 2008-111815A

  However, depending on the road, there is a case where the color lane is distinguished from other lanes by setting the color of the road surface of some lanes as colored. When guiding recommended lanes on a road having such color lanes as in the conventional case, for example, even if a lane other than the color lane is a recommended lane, the display color of the recommended lane on the screen is colored. From the viewpoint of the convenience of the driver, it is displayed in the same color as the actual road surface color of the lane, and it may be difficult for the driver to visually distinguish the recommended lane from the color lane, resulting in confusion. There was room for improvement.

  The present invention has been made in view of the above, and in a road including a color lane, the recommended lane can be easily visually distinguished from the color lane, thereby improving the convenience of the driver. An object is to provide a display system, a display method, and a display program.

In order to solve the above-described problem and achieve the object, the display system according to claim 1 is characterized in that the color lane road surface color in a color lane section in which at least one of the lanes is a color lane. A road surface color specifying unit for specifying a road surface color of a recommended lane that is a lane that the vehicle should travel in the color lane section, a road surface color of the color lane specified by the road surface color specifying unit, and the recommendation A display mode determining unit that determines a display mode for guiding and displaying the recommended lane in the color lane section based on a road surface color of the lane, and a display mode determined by the display mode determining unit; and display control means for displaying on the display unit the recommended lane in the section, the road color specifying means, the guidance end point from the guidance start point The road surface color of the color lane and the road surface color of the recommended lane are specified for all the color lane sections in the acquired route, and the display mode determination unit is configured to specify the road surface color The display mode of the recommended lane in the color lane section is determined based on the road surface color of the color lane and the road surface color of the recommended lane of all the color lane sections specified by the means.

The display system according to claim 2 is the display system according to claim 1 , wherein the display mode determination unit determines whether or not the display mode of the recommended lane needs to be changed in the middle of the route. When it is necessary to change, the display mode of the recommended lane is determined so that the number of changes in the middle of the route is minimized.

The display system according to claim 3 , in the display system according to claim 1 or 2 , wherein the display mode determining unit displays a display color of the recommended lane displayed on the display unit as a display mode of the recommended lane. decide.

The display system according to claim 4 , in the display system according to claim 3 , wherein the display mode determining unit is colorless when the road surface color of the recommended lane specified by the road surface color specifying unit is colorless, The display color of the recommended lane is determined to be a color other than the road surface color of all the color lanes in the color lane section including the recommended lane.

The display method according to claim 5 , wherein the road surface color specifying means includes a road surface color of the color lane in a color lane section in which at least one of the lanes is a color lane, and the vehicle in the color lane section. A road surface color specifying step for specifying a road surface color of a recommended lane that is a lane to be traveled, and a display mode determining means, wherein the road surface color of the color lane specified in the road surface color specifying step and the recommended lane Based on a road surface color, a display mode determination step for determining a display mode for guiding and displaying the recommended lane in the color lane section, and a display control unit, in the display mode determined by the display mode determination step, and a display control step of displaying the recommended lane in the color lane section to the display unit, contact the road surface color specifying step The road surface color specifying means acquires a route from the guidance start point to the guidance end point, and for all the color lane sections in the acquired route, the road surface color of the color lane and the road surface of the recommended lane In the display mode determination step, the display mode determination unit is configured to display the color lane road color and the recommended lane road color of all the color lane sections specified by the road color specification unit. Based on the above, the display mode of the recommended lane in the color lane section is determined.

According to a sixth aspect of the present invention, there is provided a display program for causing a computer to run on a road surface color of the color lane in a color lane section in which at least one lane of the plurality of lanes is a color lane, and in the color lane section. A road surface color specifying means for specifying a road surface color of a recommended lane that is a power lane, and the color of the color lane specified by the road surface color specifying means and the color of the road surface of the recommended lane. Display mode determining means for determining a display mode for guiding and displaying the recommended lane in the lane section, and displaying the recommended lane in the color lane section on the display unit in the display mode determined by the display mode determining means. A display program for functioning as a display control means, wherein the road surface color specifying means starts from a guidance start point. The route to the inner end point is acquired, for all the color lane sections in the acquired route, the road surface color of the color lane and the road surface color of the recommended lane are specified, and the display mode determination unit includes: The display mode of the recommended lane in the color lane section is determined based on the road surface color of the color lane of all the color lane sections specified by the road surface color specifying means and the road surface color of the recommended lane.

According to the display system according to claim 1, the display method according to claim 5 , and the display program according to claim 6 , based on the road surface color of the color lane and the road surface color of the recommended lane, the color lane section The display mode for guiding and displaying recommended lanes in the vehicle is determined, so the display mode of the recommended lanes can be determined so as not to be confused with the color surface of the color lanes. Since the lane can be easily visually distinguished from the color lane, the convenience of the driver can be improved.
Also, for all color lane sections on the route from the guidance start point to the guidance end point, the color surface color of the color lane and the road surface color of the recommended lane are specified, so the color surface color of the color lane of all color lane sections The display mode of the recommended lane can be determined in consideration of the road surface color of the recommended lane, and the convenience of the user can be further improved, for example, by making the display mode of the plurality of recommended lanes the same.

According to the display system of claim 2 , the display mode of the recommended lane is determined so that the number of changes in the middle of the route is minimized, and thus the display mode of the recommended lane is changed in the middle of the route. Since the resulting confusion can be kept to a minimum, user convenience can be further improved.

According to the display system of the third aspect, since the recommended lane display color displayed on the display unit is determined as the recommended lane display mode, the recommended lane display color is set so as not to be confused with the road surface color of the color lane. The convenience of the driver can be improved.

According to the display system of claim 4, when the road surface color of the recommended lane is colorless, the display color of the recommended lane is set to a color other than the road surface color of all the color lanes in the color lane section including the recommended lane. Since the color is determined, all the color lanes and the recommended lanes in the color lane section including the recommended lane can be visually distinguished, and the convenience for the user can be improved.

1 is a block diagram illustrating a display system according to a first embodiment of the present invention. 3 is a flowchart of display mode determination processing according to Embodiment 1; It is a figure which shows a path | route conceptually. It is a figure which shows notionally the state which set the display color to a part of path | route of FIG. It is a figure which shows notionally the state which set the display color to a part of path | route of FIG. It is a figure which shows notionally the state which set the display color to a part of path | route of FIG. It is a figure which shows notionally the state which set the display color to a part of path | route of FIG. It is a figure which shows the correspondence of the road surface color of a color lane area, and the display color of a display, FIG. 8 (a) corresponds to a color lane area, FIG.8 (b) corresponds to the lower part of FIG. 8 (a). A guidance screen displayed on the display, FIG. 8C is a guidance screen displayed on the display as corresponding to the upper part of FIG. 10 is a block diagram illustrating a display system according to Embodiment 2. FIG. 10 is a flowchart of a display mode determination process according to Embodiment 2. It is a figure which shows the correspondence of the road surface color of a color lane area, and the display color of a display, and Fig.8 (a) is displayed on a display as a color lane area and FIG.8 (b) correspond to Fig.8 (a). This is a guided screen.

  Hereinafter, embodiments of a display system, a display method, and a display program according to the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to each embodiment.

[Embodiment 1]
First, the first embodiment will be described. In Embodiment 1, a route from the guidance start point to the guidance end point is acquired, and the color surface color of the color lane and the road surface color of the recommended lane are specified for all the color lane sections in the acquired route. It is.

(Constitution)
First, the configuration of the display system according to the present embodiment will be described. FIG. 1 is a block diagram illustrating a display system according to this embodiment. As shown in FIG. 1, the display system 1 includes a current position detection processing unit 10, a display 20, a speaker 30, and a display device 40.

(Configuration-Current position detection processing unit)
The current position detection processing unit 10 is current position detection means for detecting the current position of a vehicle (hereinafter, the host vehicle) to which the display system 1 is attached. Specifically, the current position detection processing unit 10 includes at least one of a GPS, a geomagnetic sensor, a distance sensor, and a gyro sensor (all of which are not shown), and the current position (coordinates) and direction of the host vehicle. Is detected by a known method.

(Configuration-Display)
The display 20 is a display unit that displays an image guided by the display device 40, and is a display unit that displays recommended lanes in a color lane section in a display mode determined by a display mode determination unit 41b described later. The specific configuration of the display 20 is arbitrary, and a flat panel display such as a known liquid crystal display or organic EL display can be used. The “color lane section” and “recommended lane” will be described later.

(Configuration-Speaker)
The speaker 30 is output means for outputting various sounds based on the control of the display device 40. The specific form of the sound output from the speaker 30 is arbitrary, and it is possible to output a synthesized sound generated as necessary or a sound recorded in advance.

(Configuration-Display device)
The display device 40 is a display control unit that performs display-related control, and includes a control unit 41 and a data recording unit 42.

(Configuration-Display device-Control unit)
The control unit 41 is a control unit that controls the display device 40. Specifically, the CPU, various programs that are interpreted and executed on the CPU (basic control programs such as an OS, and specific functions that are activated on the OS) And an internal memory such as a RAM for storing the program and various data. In particular, the display program according to the present embodiment is substantially installed in the display device 40 via an arbitrary recording medium or network, thereby substantially configuring each unit of the control unit 41.

  The control unit 41 includes a road surface color specifying unit 41a, a display mode determining unit 41b, and a display control unit 41c in terms of functional concept. The road surface color specifying unit 41a includes a color surface color of the color lane section in which at least one of the lanes is a color lane, and a road surface of a recommended lane that the vehicle should travel in the color lane section. This is a road surface color specifying means for specifying the color. The display mode determining unit 41b determines a display mode for guiding and displaying recommended lanes in the color lane section based on the road surface color of the color lane specified by the road surface color specifying unit 41a and the road surface color of the recommended lane. It is a display mode determination means. The display control unit 41c is a display control unit that displays the recommended lanes in the color lane section on the display 20 in the display mode determined by the display mode determination unit 41b. Details of processing executed by each component of the control unit 41 will be described later.

  Here, the “color lane” is a lane whose road surface color is a color other than colorless (hereinafter referred to as “colored”), and is paved with, for example, red, orange, green, or blue color asphalt. Applicable lane. The “road surface color” is a physical color of the surface of the lane, and is distinguished from a “display color” that is a color virtually given to the surface of the lane on the display 20. “Colorless” corresponds to, for example, an asphalt color (black, gray, etc.) on an asphalt paved road. A lane having a colorless road surface color is referred to as a “non-color lane”. The “color lane section” is a section in which at least one lane of the plurality of lanes is a color lane in the traveling section of the automobile. The “recommended lane” is a lane identified as a lane that is most suitable for traveling to a destination from among a plurality of lanes and a road environment during traveling.

(Configuration-Display device-Data recording unit)
The data recording unit 42 is a recording unit that records a program and various data necessary for the operation of the display device 40, and is configured using, for example, a hard disk (not shown) as an external recording device. However, any other recording medium including a magnetic recording medium such as a magnetic disk or an optical recording medium such as a DVD or a Blu-ray disk can be used instead of or together with the hard disk.

  The data recording unit 42 includes a map information database (hereinafter, the database is referred to as “DB”). The map information DB 42a is map information storage means for storing map information. “Map information” is information necessary for specifying various positions including intersections and temporary stop points. For example, intersection data (intersection coordinates, etc.), map display data for displaying a map on the display 20, and the like. It is comprised including. The map information includes lane configuration information. “Lane configuration information” is information for specifying the configuration of the lane. For example, the number of lanes of each road, the lane type of each lane (straight forward lane, right turn lane, left turn lane, etc.), and each lane The road surface color is included.

(Processing-display mode determination processing)
Next, display mode determination processing executed by the display system 1 configured as described above will be described. FIG. 2 is a flowchart of the display mode determination process (in the following description of each process, step is abbreviated as “S”). This display mode determination process is a process for determining the display mode of the recommended lane. In this embodiment, the display mode determination process is a process for setting the display color of the recommended lane. It is automatically started later and repeatedly executed at predetermined intervals.

  Here, a route from a guidance start point (for example, the current position of the vehicle detected by the current position detection processing unit 10) to a guidance end point (for example, a destination input to the display device 40 by a user in a known manner) ( Hereinafter, it is assumed that the control unit 41 has determined the route by simply using a known route search method.

  FIG. 3 is a diagram conceptually showing the route thus determined. In FIG. 3, the road includes lane sections LK1 to LK9, and each lane section LK1 to LK9 includes three lanes (for example, lane section LK1 has lanes L1a to L1c, and lane section LK2 has lanes L2a to L2c. Etc.), one lane among the three lanes LK1 to LK9 is set as a recommended lane. The base side of the arrow indicating the recommended lane is the guidance start point side, and the tip side of the arrow is the guidance end point side. The color lanes are lane L2c (display color 1, hereafter, blue), lane L4c (display color 2, hereafter, red), L5c (display color 3, hereafter, orange), L7a (orange), L8a (orange). And the other lanes are colorless lanes. Further, in FIG. 3, the guide points P1 to P9 are indicated by black circles, and display colors C1 to C1 set for the respective guide points in squares in the vicinity of the respective guide points P1 to P9. C9 is shown. These illustrations are the same in FIGS. However, since the display colors C1 to C9 have not yet been set at the respective guide points P1 to P9 at this time, the squares of the display colors C1 to C9 in FIG. 3 are shown as blanks.

  “Guide points” P1 to P9 are points in the route, and are points where guidance of recommended lanes to the driver is started. For example, the guide point P1 guides the recommended lane L2c of the lane section LK2. The point / guidance point P2 is a point for guiding the recommended lane L3a of the lane section LK3. The method for determining the guide points P1 to P9 is arbitrary, but in this embodiment, the guide start point side is a predetermined distance from the point where the recommended lane is changed (intersection or lane change point accompanied by the change of the recommended lane). This point. The determination of the recommended lane in the route and the guidance point of the recommended lane are performed by a known method (for example, see Patent Document 1) after the route is determined.

  First, in FIG. 2, the road surface color specifying unit 41a acquires the road surface color of the recommended lanes of all the guide points in the route, and temporarily sets the acquired road surface color as the display color of the recommended lane (SA1). For example, the road surface color specifying unit 41a acquires the road surface color of the recommended lane of each guidance point from the map information DB 42a, and associates the acquired road surface color with the coordinates of each guidance point as the display color of each guidance point. Record in the data recording unit. For example, when the road surface color is colored (red), display color = colored (red) is recorded, and when the road surface color is colorless (gray), display color = colorless (gray) is recorded.

  FIG. 4 is a diagram conceptually showing a route in which the display colors C1 to C9 are set in this way. In FIG. 4, for example, the display color C2 of the guide point P2 is set to blue, the display color C4 of the guide point P4 is set to red, the display color C7 of the guide point P7 is set to orange, and the other guide points P1, P3 are set. , P5 to P6, P8, and P9 display colors C1, C3, C5 to C6, C8, and C9 are colorless (gray).

  Next, in FIG. 2, the display mode determination unit 41b repeats SA2 to SA9 by the number of guidance points included in the route (SA2 to SA9). In the processes of SA2 to SA9, the guide point that is closest to the guide end point among the guide points is generally set as one guide point to be processed (hereinafter referred to as the first target point). If the display color of the recommended lane at the first target point is not set to colored, the recommended lane can be obtained by setting the next closest guide point to the guidance end point as the first target point and performing the same processing thereafter. Among the guide points whose display color is set to colored, the guide point closest to the guide end point is set as the first target point.

  Then, the display color set for the first target point is set to the display color of the guide point (hereinafter referred to as the second target point) that is only one closer to the guidance start point than the first target point. Next, a guidance point that is only two closer to the guidance start point than the first target point is set as the second target point, and the display color set for the first target point is set as the display color of the second target point. . In the same manner, the guide point is set as the second target point while setting the first target point so that the guide start point is approached one by one (the vehicle traveling direction is returned to the guide start point side one by one). The displayed display color is set to the display color of the second target point.

  Thus, by setting the display color set to the first target point to the display color of the second target point, both display colors are set to the same color, and the number of display color changes is minimized. That is, at each guide point, any color can be used as the display color as long as it is not the same color as the road surface color of the lane other than the recommended lane in the lane section of each guide point, but the number of changes in the display color increases. As a result, there is an increased possibility that the driver may become confused when grasping the recommended route. For this reason, the display mode determination unit 41b minimizes the number of times the display color is changed, thereby reducing the possibility of confusion when the driver grasps the recommended route.

  However, if the same color as the display color set for the guide point of the first target point is included in the road surface color of the lane section of the guide point of the second target point, When the display color of the recommended lane is already set to colored, the display color set for the first target point is not set to the display color of the second target point, and the first target point is The same processing is repeated after setting a guidance point closer to the guidance start point by one than the first target point.

  Next, a specific procedure of SA2 to SA9 will be described. First, the display mode determination unit 41b sets one guidance point closest to the guidance end point among the guidance points as a first target point (SA2). When the display mode determination unit 41b returns to SA2 as a result of performing SA3 to SA8, the next first guide point closer to the guidance start point side than the first first target point is set to the next first point. Set the target point. In the same manner, each time the process returns to SA2, the next first guide point closer to the guidance start point than the previous first target point (the guidance point that has returned only one to the guidance start point) is Set the target point.

  In the repetition of SA3 to SA8, the display mode determination unit 41b refers to the display color recorded in the data recording unit in association with the coordinates of the first target point in SA1, and recommends the recommended lane of the first target point. It is determined whether or not the display color is colored (SA3). If it is determined that it is not colored (when it is determined that it is colorless) (SA3, No), the process returns to SA2.

  On the other hand, when it is determined to be colored in SA3 (when it is determined not to be colorless) (SA3, Yes), the display mode determination unit 41b repeats SA4 to SA8 by the number of guidance points included in the route (SA4). ~ SA8). For example, the display mode determination unit 41b sets, as the second target point, a guide point that is closer to the guidance start point by one than the first target point at that time (SA4). When the display mode determination unit 41b returns to SA4 as a result of performing SA5 to SA7, the display mode determination unit 41b sets the next second guide point closer to the guide start point than the first second target point. Set the target point. Similarly, each time the process returns to SA4, a guidance point that is closer to the guidance start point by one than the previous second target point is set as the next second target point.

  In the repetition of SA5 to SA7, the display mode determination unit 41b refers to the display color recorded in the data recording unit in association with the coordinates of the second target point in SA1, and recommends the recommended lane of the second target point. It is determined whether or not the display color is colored (SA5). And when it determines with it being colored (when it determines with not being colorless) (SA5, Yes), it returns to SA2.

  On the other hand, when it is determined that the color is not colored in SA5 (when it is determined that the color is colorless) (SA5, No), the display mode determination unit 41b sets the first lane section at that time to the first lane section at that time. It is determined whether there is a lane having the same display color as the display color of the guide point (SA6). If it is determined that there is a lane having the same display color (SA6, Yes), the process returns to SA2.

  Or when it determines with there being no lane of the same display color (SA6, No), the display color of the 2nd guidance point at that time is set to the same color as the display color of the 1st guidance point at that time (SA7). . For example, the display mode determination unit 41b refers to the display color recorded in the data recording unit in association with the coordinates of the first target point in SA1, and the display color is associated with the coordinates of the second target point to obtain data. Record in the recording unit.

  FIG. 5 is a diagram conceptually showing a route in which the display color is set in this way. A part of the processing of SA2 to SA9 will be described with reference to FIGS. 4 and 5. For example, as shown in FIG. 4, the guide point P9 is set as the first first target point (SA2), and the guide point P9 is set. Since the display color C9 = colorless (gray) is not colored (SA3, No), the guidance point P8 returned by one from the guidance point P9 is set as the next first target point (SA2), and the guidance point P8 Since the display color C8 = colorless (gray) is not colored (SA3, No), the guidance point P7 returned by one from the guidance point P8 is set as the next first target point (SA2). Since the display color C7 of the guidance point P7 = orange is colored (SA3, Yes), the guidance point P6 that has returned only one from the guidance point P7 to the guidance start point side is set as the first second target point ( SA4), because the display color C6 of the guide point P6 = gray is not colored (SA5, No), and the lane section LK6 of the guide point P6 has no lane of the same color as the display color C7 = orange of the guide point P7 ( As shown in FIG. 5, the display color C6 of the guidance point P6 is set to the same color as the display color C7 of the guidance point P7 = orange instead of the colorless (gray) color in FIG. Similarly, as shown in FIG. 4, the next guide point P5 is set as the next second target point (SA4), but the display color of the guide point P6 in the lane section LK5 of the guide point P5 is the same color as orange. (SA6, Yes), the process proceeds to SA2. Similarly, by repeating such processing, red is set as the display color C3 of the guide point P3 instead of colorless (gray) in FIG. 4 and the display of the guide point P1 is performed as shown in FIG. As the color C1, blue is set instead of colorless (gray) in FIG.

  Next, in FIG. 2, the display mode determination unit 41b repeats SA10 to SA17 by the number of guidance points included in the route (SA10 to SA17). In the processes of SA10 to SA17, the guide point closest to the guide start point among the guide points is set as one guide point (hereinafter, the third target point) to be processed. If the display color of the recommended lane at the third target point is not set to colored, the recommended lane is determined by setting the next closest guide point to the guidance start point as the third target point and performing the same processing thereafter. Among the guide points whose display color is set to colored, the guide point closest to the guide start point is set as the third target point.

  And the display color set to the 3rd target point is set as the display color of the guidance point (henceforth a 4th target point) near one guidance end point from the 3rd target point. Next, a guide point that is only two closer to the guidance end point than the third target point is set as the fourth target point, and the display color set for the third target point is set as the display color of the fourth target point. . In the same manner, the guide point is set as the fourth target point while being set as the third target point so that the guide end point is approached one by one (the vehicle traveling direction is advanced toward the guide end point one by one). The displayed display color is set to the display color of the fourth target point.

  Thus, by setting the display color set to the third target point to the display color of the fourth target point, both display colors are set to the same color, and the number of display color changes is minimized. That is, at each guide point, any color can be used as the display color as long as it is not the same color as the road surface color of the lane other than the recommended lane in the lane section of each guide point, but the number of changes in the display color increases. As a result, there is an increased possibility that the driver may become confused when grasping the recommended route. For this reason, the display mode determination unit 41b minimizes the number of times the display color is changed, thereby reducing the possibility of confusion when the driver grasps the recommended route.

  However, when the same color as the display color set for the guide point of the third target point is included in the road surface color of the lane section of the guide point of the fourth target point, When the display color of the recommended lane is set to colored, the display color of the fourth target point is not set, and the third target point is closer to the guidance end point by one than the third target point. Repeat the same process.

  Next, a specific procedure of SA10 to SA17 will be described. First, the display mode determination unit 41b sets one guidance point closest to the guidance start point among the guidance points as the third target point (SA10). When the display mode determination unit 41b returns to SA10 as a result of performing SA11 to SA16, only one guidance point closer to the guidance end point than the first third target point (on the guidance end point side). The guidance point that has been advanced by one) is set as the third target point. Similarly, every time the process returns to SA10, a guidance point that is closer to the guidance end point by one than the previous third target point is set as the next third target point.

  During the repetition of SA11 to SA16, the display mode determination unit 41b refers to the display color recorded in the data recording unit in association with the coordinates of the third target point in SA1, and recommends the recommended lane of the third target point. It is determined whether or not the display color is colored (SA11). If it is determined that it is not colored (when it is determined that it is colorless) (SA11, No), the process returns to SA10.

  On the other hand, when it is determined in SA11 that it is colored (when it is determined that it is not colorless) (SA11, Yes), the display mode determination unit 41b repeats SA12 to SA16 by the number of guidance points included in the route (SA12). ~ SA16). For example, the display mode determination unit 41b selects a guidance point closer to the guidance end point than the third target point at that time from the guidance point (a guidance point advanced by one to the guidance end point side), Set to the fourth target point (SA12). And as a result of performing SA13-SA15, when returning to SA12 as a result of performing SA13-SA15, the display mode determination unit 41b selects the next fourth guide point closer to the guide end point than the first fourth target point. Set the target point. Similarly, each time the process returns to SA12, a guidance point that is closer to the guidance end point by one than the previous fourth target point is set as the next fourth target point.

  In the repetition of SA13 to SA15, the display mode determination unit 41b refers to the display color recorded in the data recording unit in association with the coordinates of the fourth target point in SA1, and recommends the recommended lane of the fourth target point. It is determined whether or not the display color is colored (SA13). And when it determines with it being colored (when it determines with not being colorless) (SA13, Yes), it returns to SA10.

  On the other hand, when it is determined that the color is not colored in SA13 (when it is determined that the color is colorless) (SA13, No), the display mode determination unit 41b displays the third lane at the current point in the lane section of the fourth guidance point. It is determined whether there is a lane having the same display color as the display color of the guide point (SA14). If it is determined that there is a lane having the same display color (SA14, Yes), the process returns to SA10.

  Or when it determines with there being no lane of the same display color (SA14, No), the display color of the 4th guidance point at that time is set to the same color as the display color of the 3rd guidance point at that time (SA15). . For example, the display mode determination unit 41b refers to the display color recorded in the data recording unit in association with the coordinates of the third target point in SA1, and the display color is associated with the coordinates of the fourth target point. Record in the recording unit.

  FIG. 6 is a diagram conceptually showing a route in which the display color is set in this way. A part of the processing of SA10 to SA17 will be described with reference to FIGS. 5 and 6. For example, as shown in FIG. 5, the guide point P1 is set as the first third target point (SA10), and the guide point P1 is set. Since the display color C1 = blue is colored (SA1, Yes), the guidance point P2 that is advanced by one from the guidance point P1 toward the guidance end point is set as the first fourth target point (SA12). And since the display color C2 of the guide point P2 = blue is colored (SA13, Yes), the guide point P2 advanced by one from the guide point P1 to the guide end point side is set as the next third target point. (SA10), a guidance point P3 that is advanced by one from the guidance point P2 toward the guidance end point is set as the next fourth target point (SA12). Thereafter, the same processing is performed, and when the guide point P4 is set as the third target point (SA10) and the guide point P5 is set as the fourth target point (SA12), the display color C2 of the guide point P5 = Since gray is not colored (SA13, No) and there is no lane of the same color = red as the display color of the guidance point P4 in the lane section LK5 of the guidance point P5 (SA6, No), as shown in FIG. The display color C5 of the point P5 is set to the same color as the display color of the guide point P4 = red instead of colorless (gray) in FIG.

  Next, in FIG. 2, the display mode determination unit 41 b has a display color other than the road surface color of all the color lanes in the color lane section including the recommended lane with respect to the guide points whose display color is colorless among the respective guide points. And a display color that is not set for any guidance point (SA18). For example, the display mode determination unit 41b refers to the display color recorded in the data recording unit in association with the coordinates of each guide point, and specifies the guide point where the display color = colorless is set. In addition, the display mode determination unit 41b has a color other than the road surface color of the color lane specified by the road surface color specification unit 41a in SA1 from among a plurality of predetermined display colors, and the display recorded in the data recording unit Specify display colors other than colors. For example, when a plurality of predetermined display colors are red, orange, green, and blue, the road surface color of the color lane is red, and the display colors recorded in the data recording unit are orange and green, display Determine color = blue. Then, the specified display color is set as the display color of the specified guide point.

  FIG. 7 is a diagram conceptually showing a route in which the display color is set in this way. The processing of SA18 will be described with reference to FIGS. 6 and 7. For example, as shown in FIG. 6, the display colors C8 and C9 = colorless of the guide points P8 and P9 are any of the guide points P1 to P1. The display color not set for P7 is set to green (display color 4). This completes the setting of the display color of the recommended lane at each guide point, and the display mode determination process ends.

  Thereafter, the control unit 41 guides the recommended lane while referring to the coordinates of the guide point and the display color recorded in the data recording unit. For example, the control unit 41 determines at a predetermined interval whether or not the current position of the vehicle detected by the current position detection unit has reached the coordinates of the guide point recorded in the data recording unit. And when it arrives, the display color of the recommended lane which should be guided at the said guidance point is acquired from a data recording part. The display control unit 41c then draws an image (lane list) of each lane ahead of the vehicle at the guide point with reference to the lane type of the map information in the map information DB 42a, and among these lanes, the recommended lane The road surface is displayed in the display color acquired from the data recording unit, and the road surfaces of lanes other than the recommended lane are displayed in colorless.

  FIG. 8 is a diagram showing a correspondence relationship between the road surface color of the color lane section and the display color of the display 20, FIG. 8A is a color lane section, and FIG. 8B is a lower part of FIG. 8A. FIG. 8C shows a guidance screen displayed on the display 20 as corresponding to the upper part of FIG. 8A. As shown in the lower part of FIG. 8A, when the host vehicle is traveling in a color lane section including lane L1 (colorless) and lane L2 (red), lane L2 (red) is the recommended lane. In this case, as shown in FIG. 8B, on the guidance screen of the display 20, the lane L2 is displayed in red as the recommended lane, and the other lane L1 is displayed in colorless.

  Further, as shown in the upper part of FIG. 8A, when the host vehicle enters a color lane section including lane L2 (colorless), lane L3 (colorless), and lane L4 (blue), When L4 (blue) is a recommended lane, as shown in FIG. 8C, the lane L4 is displayed in blue as the recommended lane on the guide screen of the display 20, and the other lanes L2 and L3 are colorless. Is displayed. In the case of FIG. 8A, when the recommended lane is a colorless lane, in the guidance screen of the display 20, the recommended lane is a color that is not used in other colored lanes (for example, orange or green). Is displayed.

(effect)
As described above, according to the first embodiment, the display mode for guiding and displaying the recommended lane in the color lane section is determined based on the road surface color of the color lane and the road surface color of the recommended lane. The display mode of recommended lanes can be determined so as not to be confused with the road surface color, and the driver can easily distinguish the recommended lane from the color lane on the road including the color lane. Convenience can be improved.

  Also, for all color lane sections on the route from the guidance start point to the guidance end point, the color surface color of the color lane and the road surface color of the recommended lane are specified, so the color surface color of the color lane of all color lane sections The display mode of the recommended lane can be determined in consideration of the road surface color of the recommended lane, and the convenience of the user can be further improved, for example, by making the display mode of the plurality of recommended lanes the same.

  Also, since the recommended lane display mode is determined so that the number of changes in the middle of the route is minimized, the confusion that can be caused by changing the recommended lane display mode in the middle of the route can be minimized. Therefore, user convenience can be further improved.

  Also, as the recommended lane display mode, the display color of the recommended lane displayed on the display means is determined, so the display color of the recommended lane can be determined so as not to be confused with the road surface color of the color lane, etc. Convenience can be improved.

  In addition, when the road surface color of the recommended lane is colorless, the display color of the recommended lane is determined to be a color other than the road surface color of all the color lanes in the color lane section including the recommended lane. All color lanes and recommended lanes in the color lane section can be visually distinguished, and the convenience for the user can be improved.

[Embodiment 2]
Next, a second embodiment will be described. In the second embodiment, every time a color lane section to be traveled is recognized by a predetermined image recognition method, the road surface color of the color lane and the road surface color of the recommended lane are specified for the recognized color lane section. It is a form to do. The configuration of the second embodiment is substantially the same as the configuration of the first embodiment, unless otherwise specified. The same configuration as that of the first embodiment is used in the first embodiment. The same reference numerals and / or names as those used are attached as necessary, and description thereof is omitted.

(Constitution)
First, the configuration of the display system 2 according to the present embodiment will be described. FIG. 9 is a block diagram illustrating the display system 2 according to this embodiment. As shown in FIG. 9, the display system 2 includes a current position detection processing unit 10, a display 20, a speaker 30, a camera 50, and a display device 60.

(Configuration-Camera)
The camera is a photographing means for photographing a road surface (hereinafter referred to as a front road surface) in front of the traveling direction of the host vehicle. Image data captured by the camera is input to the control unit 61. The specific configuration of the camera is arbitrary, and for example, it is configured using a known imaging device such as a CMOS image sensor or a CCD image sensor, and a known optical system component such as a lens or a prism.

(Configuration-Display device-Control unit)
The control unit 61 of the display device 60 includes a road surface color specification unit 61a, a display mode determination unit 61b, a display control unit 61c, and an image acquisition unit 61d in terms of functional concept. Each time the color lane section to be traveled is recognized by a predetermined image recognition method, the road surface color specifying unit 61a obtains the road surface color of the color lane and the road surface color of the recommended lane for the recognized color lane section. This is a road surface color specifying means for specifying. Each time the road surface color specification unit 61a specifies the road surface color of the color lane and the road surface color of the recommended lane, the display mode determination unit 61b specifies the road surface color and the recommended lane of the specified color lane. It is a display mode determining means for determining the display content for guiding and displaying the recommended lane on the predetermined display means display 20 based on the road surface color. The display control unit 61c is a display control unit that displays the recommended lane in the color lane section on the display 20 in the display mode determined by the display mode determination unit 61b. The image acquisition unit 61d is a process for acquiring an image taken by a camera. Details of processing executed by each component of the control unit 61 will be described later.

(Configuration-Display device data recording unit)
The data recording unit 62 includes a map information DB 62a. However, unlike the first embodiment, the lane configuration information included in the map information of the map information DB includes the lane markings (boundary lines between lanes). It is assumed that, for example, white line or yellow line) type (for example, solid line, broken line, etc.) and the alignment position of each lane are included, but the road surface color of each lane is not included.

(Processing-display mode determination processing)
Next, display mode determination processing executed by the display system 2 configured as described above will be described. FIG. 10 is a flowchart of the display mode determination process. This display mode determination process is a process for determining the display mode of the recommended lane. In this embodiment, the display color of the recommended lane is set every time the color lane section to be traveled is recognized. In this process, for example, it is automatically started after the start of traveling of the host vehicle and is repeatedly executed at a predetermined interval.

  First, the road surface color specifying unit 61a recognizes the lane markings of each lane on the front road surface (SB1). For example, the image acquisition unit 61d acquires an image of the front road surface imaged by the camera, and the road surface color specifying unit 61a recognizes the acquired image by a known image recognition method, so that the lane markings of each lane can be determined. recognize.

  Next, the road surface color specifying unit 61a specifies the lane in which the host vehicle is traveling (SB2). For example, the road surface color specifying unit 61a determines the lane markings recognized in SB1, the current position of the host vehicle detected by the current position detection processing unit 10, and the lane configuration information acquired from the lane configuration information in the map information DB. The lane in which the vehicle is traveling is specified based on the lane markings and the mutual alignment positions of the lanes.

  Further, the road surface color specifying unit 61a specifies the road surface color of each lane (SB3). For example, in the road surface color specifying unit 61a, the image acquisition unit 61d acquires the image of the front road surface captured by the camera, and the road surface color specifying unit 61a recognizes the acquired image by a known image recognition method. The road surface color of each lane is specified.

  Thereafter, the display mode determination unit 61b determines whether or not the road surface color of the recommended lane is colored (SB4). This determination is made based on, for example, the lane in which the host vehicle specified in SB2 is traveling, the road surface color of each lane specified in SB3, and the recommended lane set during the route search.

  If the road surface color of the recommended lane is colored (SB4, Yes), the same color as the road surface color of the recommended lane among the road surface colors specified in SB3 is set as the display color of the recommended lane. (SB5). At this time, if the predetermined display color that can be displayed as the display color of the lane on the display 20 does not include the same color as the road surface color of the recommended lane, the predetermined display color is selected from the predetermined display colors. Select a color that is as close as possible to the recommended lane road color and set it as the display color. Then, the control unit 61 guides the recommended lane while referring to the display color set in this way. For example, the control unit 61 displays a real scene image of the front road surface captured by the camera on the display 20, displays the display color set in SB5 for the recommended lane, and displays the lane other than the recommended lane in a superimposed manner. The actual scene image remains as it is (the same applies to SB7 and SB8).

  On the other hand, when the road surface color of the recommended lane is not colored (SB4, No), the display mode determination unit 61b determines whether or not the road surface color of the non-recommended lane is colored (SB6). This determination is made based on, for example, the lane in which the host vehicle specified in SB2 is traveling, the road surface color of each lane specified in SB3, and the recommended lane set during the route search.

  If the road surface color of the non-recommended lane is colored (SB6, Yes), a color that is not the same as the road surface color of the non-recommended lane is set as the display color of the recommended lane (SB7). At this time, from among the predetermined display colors that can be displayed on the display 20 as the lane display color, a color that is as similar as possible to the road surface color of the non-recommended lane is set as the recommended lane display color.

  On the other hand, when the road surface color of the non-recommended lane is not colored (SB6, No), the road surface color moved to the actual scene image is displayed as it is without setting the display color of the recommended lane (SB8). That is, in this case, since the road surface color of the recommended lane is not colored but colorless (SB4, No), the recommended lane is displayed with the colorless road surface color as it is. This completes the display mode determination process. Thereafter, the display mode determination process is repeated in the same manner, whereby the actual scene image of the front road surface that changes as the host vehicle moves is displayed on the display 20 by the display control unit 61c, and the display color of the recommended lane is superimposed and displayed. Alternatively, the recommended lane is displayed as it is with a colorless road surface color.

(effect)
As described above, according to the second embodiment, even when the road surface color of the color lane in the color lane section cannot be acquired in advance, the road surface color of the color lane recognized by the camera 50 and the road surface color of the recommended lane are considered. Thus, the display mode of the recommended lane can be determined, and the user's convenience can be further improved, for example, by making the display mode of the plurality of recommended lanes the same.

[Modifications to Embodiment]
While the embodiments of the present invention have been described above, the specific configuration and means of the present invention may be arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. Can do. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above contents, and may vary depending on the implementation environment and details of the configuration of the invention. May be solved, or only some of the effects described above may be achieved. For example, even if there is a possibility that the recommended lane cannot be completely visually distinguished from the color lane, it is easier to visually distinguish than the conventional lane, or the same level of distinction as before can be achieved using a different technology. If it has been achieved, the problem of the present invention has been solved.

(About display color settings)
In each guide point, as long as it is not the same color as the road surface color of lanes other than the recommended lane in the lane section of each guide point, any color can be used as the display color, and as a specific method for determining the display color for that color May adopt methods other than the methods described in the above embodiments.

  For example, in SA18 of the display process of FIG. 2, for each guide point, the display color is set to a display color that is not set for any guide point with respect to the guide point having a colorless display color. Yes. However, the display color in this case may be determined and set by another method. For example, if the display color already set for any guidance point is a display color different from the road surface color of each lane in the lane section of the guidance point, the display color of the recommended lane is set. May be. However, in this case, it is necessary to determine whether or not the display color is different from the road surface color of each lane in the lane section of the guidance point, and the processing load on the control unit 41 increases by this processing. Therefore, in order to reduce the processing load, it is more preferable to perform the processing described in SA18.

(Recommended route display method)
In each of the above embodiments, as a method for displaying the recommended route on the guidance screen, the case where the guidance is performed by displaying the road surface of the recommended route in the display color has been described, but the recommended route is guided by other methods. It may be. FIG. 11 is a diagram illustrating a correspondence relationship between the road surface color of the color lane section and the display color of the display 20, FIG. 11A corresponds to the color lane section, and FIG. 11B corresponds to FIG. The guidance screen displayed on the display 20 as a thing is shown. As shown in FIG. 11A, the host vehicle travels on lane L2 in a color lane section including lane L1 (colorless), lane L2 (colorless), lane L3 (red), and lane L4 (blue). If the recommended lane is the lane L3, the arrow X for prompting the lane change from the traveling lane to the recommended lane is drawn from the traveling lane to the recommended lane. May be. In this case, the display color of the arrow X may be the display color of the recommended lane determined in the display mode determination process (in this case, red). By performing such processing, the display color of the arrow X can be determined in consideration of the road surface color of the color lane. However, in this case, since the arrow X and the recommended lane are displayed in the same display color in the portion where the arrow overlaps with the recommended lane, it may be difficult to distinguish them. Is preferably set to a color (for example, green) different from the display color of the arrow X or the recommended lane and different from the road surface color of other lanes in the lane section.

(About the display color of the route)
For example, when an arrow indicating a route is superimposed on a map of the display 20 and a recommended route guidance screen is displayed on a part of the map, the display color of the arrow indicating the route is changed to the recommended route guidance. The display color of the recommended route on the screen may be the same. For example, whenever the display color of the recommended route on the recommended route guidance screen is changed, the display mode determination unit 61b changes the same color as the display color after the change to the display color of the arrow indicating the route. By performing such processing, the driver can easily visually grasp the correspondence between the route on the map and the recommended route on the recommended route guidance screen.

DESCRIPTION OF SYMBOLS 1, 2 Display system 10 Current position detection process part 20 Display 30 Speaker 40, 60 Display apparatus 41, 61 Control part 41a, 61a Road surface color specific part 41b, 61b Display mode determination part 41c, 61c Display control part 61d Image acquisition part 42 62 Data recording part 42a, 62a Map information DB
50 cameras

Claims (6)

In the color lane section where at least one of the lanes is a color lane, the road surface color of the color lane and the road surface color of the recommended lane that the vehicle should travel in the color lane section are identified. Road surface color specifying means to perform,
Display mode determination for determining a display mode for guiding and displaying the recommended lane in the color lane section based on the road surface color of the color lane specified by the road surface color specifying unit and the road surface color of the recommended lane Means,
In the display mode determined by the display mode determination unit, comprising a display control unit for displaying the recommended lane in the color lane section on a display unit ,
The road surface color specifying means acquires a route from a guidance start point to a guidance end point, and for all the color lane sections in the acquired route, the road surface color of the color lane and the road surface color of the recommended lane Identify
The display mode determining unit is configured to determine the recommended lane in the color lane section based on the road surface color of the color lane and the road surface color of the recommended lane in all the color lane sections specified by the road surface color specifying unit. Determine the display mode of
Display system. The display mode determining means determines whether or not the display mode of the recommended lane needs to be changed in the middle of the route, and when it is necessary to change, the number of changes in the middle of the route is the smallest. Determine the display mode of the recommended lane so that
The display system according to claim 1. The display mode determining means determines a display color of the recommended lane to be displayed on the display unit as a display mode of the recommended lane.
The display system according to claim 1 or 2. When the road surface color of the recommended lane specified by the road surface color specifying unit is colorless, the display mode determination unit displays the display color of the recommended lane for all the color lane sections including the recommended lane. Determine a color other than the road surface color of the color lane,
The display system according to claim 3. In the color lane section in which at least one lane of the plurality of lanes is a color lane, the road surface color specifying means determines the road surface color of the color lane and the recommended lane that is the lane that the vehicle should travel in the color lane section. A road surface color specifying step for specifying a road surface color;
A display mode for displaying and displaying the recommended lane in the color lane section based on the road surface color of the color lane and the road surface color of the recommended lane specified by the road surface color specifying step. A display mode determining step for determining
The display control means includes a display control step of displaying the recommended lane in the color lane section on a display unit in the display mode determined by the display mode determination step,
In the road surface color specifying step, the road surface color specifying unit acquires a route from a guidance start point to a guide end point, and for all the color lane sections in the acquired route, the road surface color of the color lane and Identify the road surface color of the recommended lane,
In the display mode determining step, the display mode determining means is based on the road surface color of the color lane and the road surface color of the recommended lane of all the color lane sections specified by the road surface color specifying means. Determining the display mode of the recommended lane in the color lane section;
Display method. Computer
In the color lane section where at least one of the lanes is a color lane, the road surface color of the color lane and the road surface color of the recommended lane that the vehicle should travel in the color lane section are identified. Road surface color specifying means to perform,
Display mode determination for determining a display mode for guiding and displaying the recommended lane in the color lane section based on the road surface color of the color lane specified by the road surface color specifying unit and the road surface color of the recommended lane Means,
Display control means for displaying the recommended lane in the color lane section on a display unit in the display mode determined by the display mode determination unit;
A display program for functioning as
The road surface color specifying means acquires a route from a guidance start point to a guidance end point, and for all the color lane sections in the acquired route, the road surface color of the color lane and the road surface color of the recommended lane Identify
The display mode determining unit is configured to determine the recommended lane in the color lane section based on the road surface color of the color lane and the road surface color of the recommended lane in all the color lane sections specified by the road surface color specifying unit. Determine the display mode of
Display program.

Images