JP4357932B2 - Car navigation system - Google Patents

Description

  The present invention relates to an in-vehicle navigation device, and more particularly, to an in-vehicle navigation device adapted so that the distance to the destination can be determined sensuously while traveling on a guidance route toward a set destination.

  In a conventional in-vehicle navigation device, a CPU that controls all processing related to navigation, a storage device such as a CD-ROM or DVD-ROM that stores map data, a display device, and a current position of the host vehicle A GPS (Global Positioning System) receiver, a gyro for detecting the traveling direction and traveling speed of the own vehicle, a vehicle speed sensor, and the like are provided. Then, the CPU reads out map data including the current position of the own vehicle from the storage device, draws a map image around the own vehicle position based on the map data, and indicates the current position of the own vehicle. The vehicle position mark to be displayed is superimposed on the screen and the map image is scrolled according to the movement of the vehicle, or the map position is fixed on the screen and the vehicle position mark is moved. You can see at a glance where the car is currently driving.

  In-vehicle navigation devices are usually equipped with a function (route guidance function) that guides a user so that the user can easily travel on the road without making a mistake. According to this route guidance function, the CPU calculates the optimal route from the departure point (typically the current position of the vehicle) to the destination using map data, such as a horizontal search method or a Dijkstra method. The route searched is stored as a guide route, and the route can be distinguished from other roads on the map image while traveling (for example, the color is changed or the line width is increased). When a predetermined distance is reached to the approaching intersection on the guidance route, a guide map of the intersection (an enlarged view of the intersection, an arrow indicating the direction of travel at the intersection, the intersection) on the map image By displaying the distance to the intersection, the name of the intersection, etc., the user can grasp which road should be traveled and in which direction the intersection should be traveled.

  In performing such route guidance, the conventional in-vehicle navigation device prepares road data for route guidance and road data for display separately, and uses road data for route guidance for route search and route guidance. However, the road data for display was used for map display. At this time, there are some places where traffic control information (prohibited right / left turn, prohibition of entry, etc.) has not been partially investigated for data on narrow streets such as residential roads that are often present in urban areas, etc. It was not included in the road data for route guidance. For this reason, the narrow street is displayed as a map based on the road data for display, but is not a target for actual route search (route guidance).

  In addition, when the user gets lost in the narrow street outside the original guidance route, the user usually enlarges and displays the map screen including the narrow street in order to make it easier to confirm the position where the vehicle is currently traveling. is there. However, on such an enlarged map screen, the destination is off the screen (that is, not displayed), and the original guidance route is not displayed, so the vehicle is driven in any direction. The user cannot easily determine whether or not to do so, and the user feels uneasy.

  In such a case, there is information that guides the direction of the destination on the screen as guidance information that helps the user. This guideline is destination guidance information (for example, a line indicated by GL in FIG. 2B) that connects the current position of the vehicle to the destination with a straight line, and displays an enlarged map screen such as an urban area or the vicinity of the destination. It is often displayed under the circumstances. By referring to these guidelines, the user can grasp the rough direction of the destination and can drive the vehicle toward the destination. This guideline can be selectively displayed based on user settings as needed even when the map screen is not in an enlarged state. In this case, the guideline is displayed together with the guidance route.

  In addition, as auxiliary guidance information when the destination is not displayed on the screen, the distance from the current position of the vehicle (vehicle position) to the destination is displayed on the screen as a numerical value or a character. There is also something like that.

As a technique related to the above prior art, for example, when a destination is set, a distance X from the vehicle position to the destination is obtained, and acquired from various sensors during route guidance toward the destination. There is a method in which a remaining distance Y to the destination is obtained based on the data, and a “Y / X” graph indicating the rate of arrival at the destination is displayed on the screen (for example, see Patent Document 1). ).
JP-A-8-136271

  As described above, in the conventional vehicle-mounted navigation device, when the information is guided to the destination, in addition to the original guidance route, when the user gets lost in a narrow street that is not targeted for route search (route guidance), the purpose is A guideline indicating the direction of the ground is displayed, and when the destination is not displayed on the screen, the distance to the destination is displayed by a numerical value, characters, or the like.

  However, when the distance to the destination is displayed on the screen in numerical values or characters, it is not easy and safe to determine the distance to the destination by judging the numerical values and characters during driving. There is a problem above.

  Even if the guideline is displayed, it is only possible to grasp the rough direction of the destination, and unless the distance to the destination is displayed on the screen, it is not possible to judge the distance to the destination Can not. However, when the distance to the destination is displayed with a numerical value or the like, there is a safety problem as described above for the determination.

  In addition, some in-vehicle navigation devices change the scale of the display screen in a direction to reduce when they are close to the destination, but in this case, the city map is too small to be understood and is approaching the destination. It is not possible to easily determine whether or not.

  The present invention was created in view of the problems in the prior art, and provides an in-vehicle navigation device that allows a user to sensuously determine the distance to a destination and contributes to safe traveling. With the goal.

In order to solve the above-described problems of the prior art, an in- vehicle navigation device according to an embodiment of the present invention includes a display unit that provides guidance information through a screen, a storage unit that stores map data, and a destination that is designated by a user. Information input means for inputting information for route guidance, etc., own vehicle position detecting means for detecting the current position of the own vehicle, and display means, storage means, information input means, and own vehicle position detecting means. Connected to the control means, and the control means causes the display means to display the destination from the current position of the host vehicle when displaying a guidance route to the destination on the screen based on the map data. Each time a plurality of predetermined distances are reached in a direction in which the distance to the ground is shortened, the line width of the guide route is gradually increased and displayed .

According to the vehicle-mounted navigation device according to this aspect, each time a plurality of predetermined distances are reached in the direction in which the distance from the current position of the host vehicle to the destination is shortened, the line width of the guidance route is gradually increased. Since it is displayed, the distance to the destination can be determined sensuously (visually) by looking at the change from thin display to thick display. You can easily recognize whether you are approaching.

Also, unlike destination guidance that relies on numerical values and characters as in the past, the distance to the destination is displayed as a change in the line width of the guidance route (change from a thin line width to a thick line width) . It is easy to determine the distance to the destination, and there is no safety problem as seen in the prior art. That is, it contributes to safe driving.

An in- vehicle navigation apparatus according to another embodiment of the present invention includes a display unit that provides guidance information through a screen, a storage unit that stores map data, a destination pointed by a user, information for route guidance, and the like. Input information input means, own vehicle position detection means for detecting the current position of the own vehicle, and display means, storage means, information input means, and control means operably connected to the own vehicle position detection means When the control unit causes the display unit to display a guide route to the destination on the screen based on the map data, the direction from the current position of the host vehicle to the destination is shortened. In this case, each time a plurality of predetermined distances are reached, the color of the guidance route is gradually changed according to the degree of lightness and darkness and displayed .
According to the vehicle-mounted navigation device according to this aspect, each time a plurality of predetermined distances are reached in the direction in which the distance from the current position of the host vehicle to the destination is shortened, the color of the guidance route is gradually changed according to the degree of lightness and darkness. Since the display is changed, the same effect as that of the vehicle-mounted navigation device according to the above aspect can be obtained by looking at the change in color (change according to the degree of light and darkness).

Furthermore, in the in-vehicle navigation device according to the above aspect, when the control unit causes the display unit to display a guideline indicating the direction of the destination on the screen based on the map data, Depending on the distance from the current position to the destination, at least one of the line width and color of the guideline may be changed and displayed.
According to this embodiment, since at least one of the line width and color of the guideline is displayed in accordance with the distance from the current position of the vehicle to the destination, the change in the line width / color is seen. Thus, the same effect as the in-vehicle navigation device according to the above embodiment can be obtained, and the direction of the destination can be grasped .

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

  FIG. 1 is a block diagram schematically showing a part of the configuration of an in-vehicle navigation device according to an embodiment of the present invention.

  In the in-vehicle navigation device 30 of the present embodiment, reference numeral 1 denotes a DVD drive. Each DVD (DVD-ROM) 1a driven by the DVD drive 1 has each scale level (1/12500, 1/25000, 1 / Map data divided into a longitude width and a latitude width of an appropriate size in accordance with 50000). This map data includes road data for display and route guidance, and each data is represented by a coordinate set of points (nodes) expressed by longitude and latitude. The DVD 1a further stores data relating to various facilities (convenience store, super discount shop, department store, gas station, etc.) existing around the road. In the present embodiment, a DVD-ROM is used as a medium for storing map data and the like, but other storage media such as a hard disk and a CD-ROM may be used instead.

  Reference numeral 2 denotes an operation unit for operating a navigation apparatus body 10 to be described later, and has, for example, a remote control transmitter (not shown). The remote control transmitter is provided with various operation buttons, a joystick, and the like for selecting various menus and various items on the display screen of the display device 6 to be described later and for executing the selected menus. Also, 3 is a communication device such as a mobile phone or an in-vehicle phone for communicating with various information centers, and 4 is a GPS that detects the longitude and latitude of the current position of the vehicle by receiving GPS signals sent from GPS satellites. The receiver 5 is a self-contained navigation sensor, and the self-contained navigation sensor 5 is composed of an angle sensor such as a gyro for detecting the traveling direction of the own vehicle, and a distance sensor that generates a pulse at every predetermined traveling distance. Has been.

  The display device 6 has a screen such as an LCD. Basically, guidance information related to navigation (a map around the current position of the vehicle, the vehicle itself, etc.) is controlled based on control from the navigation device body 10 described later. The current position of the vehicle (vehicle position mark), a guide route from the vehicle position to the destination, a guideline for connecting the vehicle position to the destination in a straight line, and the like are provided to the user on the screen. Further, the display device 6 displays destination guidance information related to the guidance route / guideline display performed by the device 30 on the screen as will be described later. Reference numeral 7 denotes a speaker which provides guidance information related to the above navigation to the user by voice.

  In the navigation apparatus body 10, 11 is a data reading control unit for reading the map data read from the DVD 1 a via the DVD drive 1, and 12 is a temporary storage of the map data read by the data reading control unit 11. Buffer memories 13 to 16 indicate interfaces (I / F) connected to the operation unit 2, the communication device 3, the GPS receiver 4, and the self-contained navigation sensor 5, respectively.

  Reference numeral 17 denotes a control unit constituted by a microcomputer or the like. Basically, the current position of the own vehicle is detected based on a signal output from the GPS receiver 4 or output from the autonomous navigation sensor 5. The vehicle speed is calculated based on the signal to be transmitted, the data reading control unit 11 is controlled, and the map data to be displayed is read from the DVD 1a to the buffer memory 12 via the DVD drive 1, or the buffer memory 12 For example, to search for a guide route from the vehicle position to the destination under the search conditions set using the map data read in, to generate a guideline that connects the vehicle position to the destination in a straight line, etc. Various processes related to navigation are executed. Further, as will be described later, the control unit 17 has a function of controlling destination guidance processing related to guidance route / guideline display performed by the device 30.

  Reference numeral 18 denotes a map drawing unit that performs map image drawing processing using map data read to the buffer memory 12 based on control from the control unit 17, and reference numeral 19 denotes various menu screens (operation screens) according to operating conditions. ), An operation screen / mark generating unit for generating various marks such as a vehicle position mark and a cursor, and 20 are all nodes (denoted by longitude and latitude) from the departure point of the guidance route searched by the control unit 17 to the destination. The guide route storage unit 21 stores data relating to the coordinates of the received points), 21 reads the data (node sequence) of the guide route from the guide route storage unit 20 based on the control from the control unit 17, and the guide route A guide route drawing unit that draws in a display mode different from that of other roads (for example, changing the color or increasing the line width), and 22 is a guideline drawing generated by the control unit 17 Indicating the guidelines drawing unit that performs the management. As will be described later, the control unit 17 enters the narrow street with the route guidance to the destination along the guidance route (that is, when the guidance route is no longer displayed). Generate guidelines that indicate the direction of the destination.

  Reference numeral 23 denotes an image composition unit. Based on the control from the control unit 17, the guidance route drawn by the guidance route drawing unit 21, the operation screen / mark generation unit on the map image drawn by the map drawing unit 18. 19 has a function of superimposing the operation screen generated in 19 and various marks, and overlaying the guideline drawn by the guideline drawing unit 22 as necessary, and displaying it on the screen of the display device 6. Further, as will be described later, the image composition unit 23 also has a function of displaying destination guidance information related to guidance route / guideline display performed by the device 30 on the screen of the display device 6. An audio output unit 24 outputs an audio signal (guidance information related to navigation) to the speaker 7 based on control from the control unit 17.

  In the in-vehicle navigation device 30 of the present embodiment configured as described above, the DVD drive 1 is “storage means”, the operation unit 2 is “information input means”, and the GPS receiver 4 is “own vehicle position detection means”. The display device 6 corresponds to “display means”, and the control unit 17 corresponds to “control means”.

  2 to 6 show screen display examples relating to guidance route / guideline display performed by the in-vehicle navigation device 30 according to the present embodiment.

  FIG. 2 shows an example of a screen display when the guidance route / guideline searched / generated by the control unit 17 is displayed. In the display example shown in FIG. 2A, the host vehicle showing the current position of the host vehicle on the map image displayed on the display screen 40 of the display device 6 through the image composition unit 23 based on the control from the control unit 17. A guide route GR from the vehicle position (CM) to the destination (GOAL) is displayed together with the position mark CM. On the other hand, in the display example shown in FIG. Based on the map image displayed on the display screen 40 of the display device 6 on the basis, a guideline GL that connects the vehicle position (CM) to the destination (GOAL) with a straight line is displayed together with the vehicle position mark CM.

Here, the guide route GR is displayed in a display mode different from other roads so that the user can easily identify it. Similarly, the guideline GL is also displayed in a relatively conspicuous display mode so that the user can easily identify it. Is done. In the example shown in the figure, both the guide route GR and the guide line GL are displayed in the display mode of “blue” with a line width of W ₀ . Although not particularly shown in FIG. 2, landmarks and the like of various facilities (convenience store, gas station, etc.) selected by user settings are displayed as necessary.

  In the display example shown in FIG. 2, the destination (GOAL) is not displayed on the screen 40. This is due to the following reason. In other words, if it is attempted to display the entire route of the guidance route GR from the vehicle position (CM) to the destination (GOAL) on the same screen, generally the display scale factor of the screen is dependent on the distance to the destination (GOAL). Needs to be considerably small, and in this case, the screen becomes difficult to see. Therefore, by the setting operation by the user via the operation unit 2, the display scale ratio of the screen is adjusted to a display scale that can at least grasp the guide route GR around the host vehicle (that is, the screen display is enlarged). FIG. 2A shows a screen display example when the display scale is adjusted, and the same applies to FIG. 2B.

FIG. 3 shows an example of a screen display when the line width of the guide route GR is changed according to the distance from the vehicle position (CM) to the destination (GOAL). In the illustrated example, the line width of the guide route GR is gradually increased from W ₀ → W ₁ → W ₂ when a plurality of predetermined distances are reached in a direction in which the distance to the destination is shortened as will be described later. A screen display example when displayed is shown.

  FIG. 4 shows an example of a screen display when the color of the guidance route GR is changed according to the distance from the vehicle position (CM) to the destination (GOAL). In the illustrated example, as will be described later, when a plurality of predetermined distances are reached in a direction in which the distance to the destination is shortened, the color of the guide route GR is gradually changed from “blue” to “yellow” to “ An example of a screen display when the display is changed to “red” is shown.

  Here, when the line width / color of the guidance route GR is changed and displayed, the “distance from the vehicle position to the destination” basically refers to the distance of the guidance route GR. As a modification, a linear distance from the vehicle position to the destination may be used.

FIG. 5 corresponds to the screen display example of FIG. 3, and an example of the screen display when the line width of the guide line GL is changed according to the distance from the vehicle position (CM) to the destination (GOAL). Is shown. In the illustrated example, the line width of the guide line GL is gradually increased from W ₀ → W ₁ → W ₂ when a plurality of predetermined distances are reached in a direction in which the distance to the destination is shortened as will be described later. An example of screen display in the case of having been done is shown.

  FIG. 6 corresponds to the screen display example of FIG. 4, and an example of the screen display when the color of the guideline GL is changed according to the distance from the vehicle position (CM) to the destination (GOAL). Show. In the illustrated example, the color of the guide line GL is gradually changed from “blue” to “yellow” to “red” when a plurality of predetermined distances are reached in a direction in which the distance to the destination is shortened as will be described later. An example of the screen display when displayed in this way is shown.

  Here, when displaying the line width / color of the guideline GL, the “distance from the vehicle position to the destination” basically refers to the straight line distance from the vehicle position to the destination. However, as a modified example, the distance of the guide route from the vehicle position to the destination may be used.

  Hereinafter, the destination guidance processing related to the guidance route / guideline display performed by the vehicle-mounted navigation device 30 according to the present embodiment will be described with reference to FIG. 7 showing an example of the processing flow.

  First, in the first step S1, a user (for example, a driver) sets a destination by an input operation from the operation unit 2 (remote control transmitter). At this time, if necessary, set a passing point (stop point) on the way to the destination, and various conditions (whether toll road priority or general road priority, reduction of travel distance or It also sets which of the reductions in travel time is prioritized. The set data such as the destination is input to the control unit 17 via the interface 13.

  In the next step S2, the control unit 17 searches for the guidance route GR that the host vehicle should travel to the destination, stores the data of the searched guidance route GR in the guidance route storage unit 20, and guides the route GR. Is displayed on the screen of the display device 6. Specifically, the control unit 17 controls the data reading control unit 11 on the basis of the input destination data and the current position (departure point) data detected by the GPS receiver 4. The map data in the range from the departure point to the destination is read from the DVD 1a to the buffer memory 12 via the DVD drive 1, and the optimum connection between the departure point and the destination is referred to with reference to the read map data. The guide route GR is searched by a horizontal search method or the like. Then, as shown in the screen display example of FIG. 2A, the searched guidance route GR is displayed on the screen 40 of the display device 6 so as to be superimposed on the map image together with the vehicle position mark CM. This guide route GR is displayed in a relatively conspicuous display mode so that the user can easily identify it. As a result, the user can grasp the guide route GR to the destination (GOAL) through the screen 40 of the display device 6.

  At this time, as necessary, the control unit 17 generates a guideline connecting the vehicle position to the destination in a straight line based on the user setting, and as shown in the screen display example in FIG. The guideline GL may be displayed on the screen 40. By displaying this guideline GL, it is possible to grasp the rough direction of the destination.

As described above, in the state where the vehicle is traveling on the guidance route GR toward the destination, in the next step S3, the control unit 17 performs buffering based on the current position of the vehicle detected by the GPS receiver 4. With reference to the map data read to the memory 12 and the data stored in the guide route storage unit 20, whether or not the predetermined distance L ₁ (for example, 5 km) has been reached (YES) or not (NO) Determine whether. The “predetermined distance to the destination” here means a predetermined distance from the vehicle position to the destination on the guidance route GR. If the determination result is YES, the process proceeds to step S4. If the determination result is NO, the determination process is repeated until the predetermined distance is reached.

In the next step S4, the line width of the guide route GR is set on the screen of the display device 6 via the image composition unit 23 based on the control from the control unit 17 as shown in the screen display example of FIG. W ₀ to W ₁ are displayed thickly, or the color of the guidance route GR is changed from “blue” to “yellow” as shown in the screen display example of FIG. By the change in the line width or the color of the guide route GR, the user can sensuously determine the distance to the destination (in this case, the position has reached 5 km). You can recognize that you are approaching the destination.

At this time, if the guide line GL is displayed on the screen of the display device 6, the line width is increased from W ₀ to W ₁ and displayed as in the case of the guide route GR (FIG. 5A). Alternatively, the color is changed from “blue” to “yellow” for display (FIG. 6A).

In the next step S5, similarly to the processing performed in step S3, the control unit 17 determines whether or not the predetermined distance L ₂ (for example, 2 km) has been reached (YES) or not (NO). To do. If the determination result is YES, the process proceeds to step S6, and if the determination result is NO, the determination process is repeated until the predetermined distance is reached.

In the next step S6, the guidance route is displayed on the screen of the display device 6 on the screen of the display device 6 based on the control from the control unit 17 in the same manner as the processing performed in step S4. The line width of GR is increased from W ₁ to W ₂ and displayed, or the color of the guide route GR is changed from “yellow” to “red” as shown in the screen display example of FIG. indicate. By changing the line width or the color of the guide route GR, the user can sensuously determine the distance to the destination (in this case, the position has reached 2 km), and You can recognize that you are closer to the ground.

At this time, if the guideline GL is also displayed, the line width is increased from W ₁ to W ₂ (FIG. 5B), or the color is changed from “yellow” to “red”. The display is changed (FIG. 6B). Then, this processing flow is “end”.

As described above, according to the vehicle-mounted navigation device 30 according to the present embodiment , a plurality of predetermined distances (L1, L2 in FIG. 7) are reached in the direction in which the distance from the vehicle position to the destination is shortened. Every time (that is, as approaching the destination), the line width of the guide route GR / guideline GL is gradually increased from W0 → W1 → W2, or the color of the guide route GR / guideline GL is changed according to the degree of lightness and darkness. The display gradually changes from “blue” to “yellow” to “red” so that the distance to the destination can be visually determined by looking at the change in the line width / color. it can. In the case of the guideline GL, the direction of the destination can be further grasped. Thereby, it is possible to easily recognize whether or not the vehicle is approaching the destination.

  In addition, unlike the conventional destination guidance that relies on numerical values or characters, the distance to the destination is displayed by the change in the line width / color of the guidance route GR / guideline GL. It is easy to determine the distance, and there is no safety problem as seen in the prior art. That is, it contributes to safe driving.

  In the above-described embodiment, the case where the line width or the color of the guidance route GR / guideline GL is displayed while being gradually changed (FIGS. 3 to 6) has been described as an example, but as is apparent from the gist of the present invention, Of course, the display form of the line width / color of the guide route GR / guideline GL is not limited to this. For example, the guidance route GR / guideline GL may be displayed with its line width and color both changed. In this case, the screen 40 of the display device 6 is a combination of the screen displays of FIGS. 3 (a) and 4 (a), and the screen displays of FIGS. 3 (b) and 4 (b). Guidance information corresponding to each of the screen displays of FIG. 5 (a) and FIG. 6 (a) and the combination of screen displays of FIG. 5 (b) and FIG. 6 (b). The

  In the processing flow illustrated in FIG. 7, the case where the guideline GL is selectively displayed as necessary when the guidance route GR is displayed on the screen has been described as an example. Of course, it is not limited. For example, the guideline may be displayed when entering a narrow street not targeted for route search.

1 is a block diagram schematically showing part of the configuration of an in-vehicle navigation device according to an embodiment of the present invention. It is a figure which shows the example of a screen display concerning the display of a guidance route / guideline. It is a figure which shows the example of a screen display when changing and displaying the line | wire width of a guidance path | route. It is a figure which shows the example of a screen display when changing the color of a guidance path | route, and displaying. It is a figure which shows the example of a screen display when changing and displaying the line width of a guideline. It is a figure which shows the example of a screen display when changing the color of a guideline and displaying. It is a flowchart which shows an example of the destination guidance process which concerns on the display of the guidance route / guideline which the vehicle-mounted navigation apparatus of FIG. 1 performs.

Explanation of symbols

1 ... DVD drive (storage means),
2 ... operation part (information input means),
4 ... GPS receiver (own vehicle position detection means),
5 ... Self-contained navigation sensor,
6 ... Display device (display means),
17 ... control unit (control means),
18 ... Map drawing part,
21 ... Guide route drawing unit,
22 ... Guideline drawing part
23. Image composition unit,
30 ... In-vehicle navigation device,
40 ... display screen,
CM ... Own vehicle position mark,
GOAL ... Destination,
GR: Guide route,
GL ... Guidelines.

Claims (5)

Display means for providing guidance information through a screen;
Storage means storing map data;
An information input means for inputting a destination pointed by the user, information for route guidance, and the like;
Own vehicle position detecting means for detecting the current position of the own vehicle;
A control means operatively connected to the display means, storage means, information input means and own vehicle position detection means,
The control means may cause the display means to display a plurality of directions in a direction in which a distance from the current position of the host vehicle to the destination is shortened when a guidance route to the destination is displayed on the screen based on the map data. Each time the predetermined distance is reached, the line width of the guide route is gradually increased and displayed . Display means for providing guidance information through a screen;
Storage means for storing map data;
An information input means for inputting a destination pointed by the user, information for route guidance, and the like;
Own vehicle position detecting means for detecting the current position of the own vehicle;
A control means operatively connected to the display means, storage means, information input means and own vehicle position detection means,
The control means may cause the display means to display a plurality of directions in a direction in which a distance from the current position of the host vehicle to the destination is shortened when a guidance route to the destination is displayed on the screen based on the map data. Each time the predetermined distance is reached, the in- vehicle navigation device is characterized in that the color of the guide route is gradually changed according to the degree of brightness and displayed . The control means displays the guideline indicating the direction of the destination on the screen based on the map data on the screen according to the distance from the current position of the host vehicle to the destination. The in- vehicle navigation device according to claim 1 or 2, wherein at least one of a line width and a color of the guide line is changed and displayed. The control means gradually increases the line width of the guideline when the plurality of predetermined distances are reached in the direction in which the distance from the current position of the vehicle to the destination is shortened with respect to the display means. The in-vehicle navigation device according to claim 3 , wherein the navigation device is displayed. The control means gradually changes the color of the guideline according to the degree of lightness and darkness when reaching a plurality of predetermined distances in a direction in which the distance from the current position of the vehicle to the destination is shortened with respect to the display means. The in-vehicle navigation device according to claim 3 , wherein the display is changed and displayed.

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