JP2010101639A - In-vehicle navigation device and map display method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an in-vehicle navigation device and a map display method capable of presenting the traveling state including the display of the entire guide route when turning on ACC again after turning off the ACC by parking or stopping a vehicle in the middle of the travel to the destination. <P>SOLUTION: The in-vehicle navigation device including a function for searching for a guide route to the destination and guiding a vehicle along the guide route includes: a display means; a storage means storing map data; an own vehicle position detection means; and a control means for displaying a map image including the entire guide route from the start point to the destination on a screen of the display means for a prescribed period of time from the detection of the on state of the ACC again after the ACC is turned off in the middle of the travel. The control means may display eco-drive information guidance or information guidance on alert point in the driving prepared on the basis of the evaluation of the driving states when displaying the map. Alternatively, the control means may display travel information guidance prepared on the basis of the current position information. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an in-vehicle navigation device and a map display method for guiding a vehicle to a destination according to a guidance route, and in particular, adapted to display useful travel information when starting again before reaching a destination. The present invention relates to an in-vehicle navigation device and a map display method.

  Conventional typical vehicle-mounted navigation devices include a control device such as a CPU that controls all processes related to navigation, a storage device such as a DVD (Digital Versatile Disk) -ROM or an IC memory card that stores map data in advance, It has a display device, a GPS (Global Positioning System) receiver, a detection device for detecting the current position and current direction of the vehicle, such as a gyroscope and a vehicle speed sensor. Then, the control device reads out map data including the current position of the vehicle from the storage device, displays a map image around the vehicle position on the display device screen based on the map data, and indicates the current position of the host vehicle. The vehicle position mark to be displayed is superimposed on the map image, the map image is scrolled according to the movement of the vehicle, the map image is fixed on the screen and the vehicle position mark is moved, and where the vehicle is currently located. You can see at a glance whether you are driving.

  In-vehicle navigation devices are usually equipped with a function (route guidance function) that guides the 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 the vehicle approaches a predetermined distance to the intersection whose course should be changed on the guidance route, a guide map of the intersection on the map image (an enlarged view of the intersection, the direction of travel at the intersection) Display an arrow, a distance to the intersection, the name of the intersection, etc.) so that the user can know which road to drive and which direction to proceed at the intersection. It has become.

  In such a navigation device, a guidance route is displayed together with a map around the current position of the host vehicle at a specified scale. Therefore, while route guidance is displayed in an easy-to-understand manner around the host vehicle, in this state, it is impossible to grasp where the current location is relative to the entire guidance route.

  On the other hand, a technique for designating points such as a starting point and a destination and displaying a map including those points has been studied and put into practical use.

  As a technique related to this, in Patent Document 1, an area required to display a set route is selected and set from basic drawing map data and a plurality of enlarged drawing map data obtained by dividing the basic drawing map data. A navigation device for displaying a route on a map without protruding is described.

Further, Patent Document 2 describes a map display method that allows a destination and a vehicle position to be displayed on one screen at a scale of a map that is the most detailed description.
Japanese Patent No. 2905491 Japanese Patent Laid-Open No. 02-140788

  As described above, it is possible to display a map display including the vehicle position and the destination at an optimum scale. In addition, if the destination is specified when the guide route is set, the entire guide route including the departure point and the destination can be displayed.

  However, after the vehicle starts running, it is usually necessary to perform a predetermined operation in order to display a map including the destination by displaying an enlarged map around the vehicle position and displaying a map including the destination. . In addition, when a guide route is searched and you are traveling according to the guide route, you can specify the point you want to display or the entire guide route to display the entire route from the starting point to the destination. It is necessary to operate an operation button for displaying “”, which is troublesome for the user and may cause a problem in safe driving.

  The present invention has been made in view of such problems of the prior art, and is guided when the vehicle is parked or stopped in the middle of traveling to the destination and the ACC is turned off, and then the ACC is turned on again. It is an object of the present invention to provide an in-vehicle navigation device and a map display method capable of presenting a traveling situation including an entire route display.

  In order to solve the above-described problems of the prior art, according to the basic form of the present invention, there is provided an in-vehicle navigation device having a function of searching for a guidance route to a destination and guiding the vehicle along the guidance route. After the display unit, the storage unit storing the map data, the host vehicle position detection unit for detecting the current position of the host vehicle, and the ACC is turned off during the travel along the guidance of the guidance route, A map including the entire guide route from the starting point to the destination of the guide route created based on the map data together with the current position of the host vehicle for a predetermined period from when it is detected that the ACC is turned on again. There is provided a vehicle-mounted navigation device comprising control means for displaying an image on the screen of the display means.

  In the in-vehicle navigation device according to this aspect, the control unit creates eco-drive information created based on an evaluation of a driving situation of the vehicle from the departure place to the current position when displaying a map including the entire guidance route. A guide or driving warning point information guide or a travel information guide created based on current position information for the entire route of the guidance route may be displayed together, and the control means may display the predetermined period. Then, the guidance route from the current vehicle position to the destination may be displayed on the screen of the display means at a specified scale before the ACC is turned on.

  In the in-vehicle navigation device according to this aspect, the control means includes a travel distance from the departure location to the current location, a travel time from the departure location to the current location, a remaining distance from the current location to the destination, and a destination location. The estimated arrival time may be calculated and displayed on the travel information guide, and the control means may display the vicinity of the destination according to a user instruction in a state where the travel information guide is displayed. May be displayed, a guide route process guide may be displayed, a transit point may be added, or a nearby facility may be searched.

  Further, in the in-vehicle navigation device according to this aspect, the control means calculates the fuel consumption between the points where the ACC is turned off from the departure point to the current point, and displays the fuel consumption in the eco-drive information guide. Further, an acceleration sensor for detecting the acceleration of the vehicle may be provided, and the control means may calculate an eco-drive evaluation calculated based on the vehicle acceleration recorded during travel from the departure place to the current location. The eco-drive evaluation may be displayed in a graph based on the score for each predetermined section obtained by subtracting a predetermined score from the vehicle acceleration value from a predetermined reference point. And a steering angle sensor for detecting a steering angle, wherein the control means detects an acceleration exceeding a predetermined acceleration or a steering angle exceeding a predetermined steering angle. Is determined as dangerous driving when, records the point it is determined that the dangerous driving, and displays the location on the map, it may be displayed the contents of the dangerous driving.

  According to the in-vehicle navigation device of the present invention, when a guidance route is set and the ACC is turned off while traveling according to the guidance of the guidance route, and the ACC is turned on when the ACC is turned off, the guidance is performed. The map image is displayed with the scale adjusted so that the entire guidance route including the starting point and the destination of the route is displayed. The vehicle position is displayed on the guidance route, and the route from the departure point to the vehicle position and the route from the vehicle position to the destination are displayed in different modes. As a result, it is possible to know at a glance how far the vehicle has traveled on the route to the destination, which is beneficial to the driver. In addition, the driver can omit the operation of displaying the entire guidance route at the time of departure, which can contribute to safe driving.

  Moreover, according to the other form of this invention, the map display method implemented in the vehicle-mounted navigation apparatus which concerns on said form is provided. The map display method according to the embodiment is a map display method implemented in an in-vehicle navigation device having a function of searching for a guidance route to a destination and guiding a vehicle along the guidance route. A step of detecting a current position of the vehicle, a step of detecting that the ACC is turned on again from a state where the ACC is turned off, a step of acquiring the whole stroke of the guidance route, and the whole stroke of the guidance route. A map image including a step of displaying the map image including the entire route of the guidance route together with the current position of the host vehicle after detecting that the ACC is turned on. And after a predetermined period of time has elapsed since the ACC is turned on, the display means displays the screen from the current position to the destination at a scale before the ACC is turned on. And wherein the guide route having the steps of: displaying on a screen of said display means.

  In the map display method according to this aspect, before the step of displaying a map image including the entire process of the guidance route on the screen of the display means, the step of evaluating the driving situation of the vehicle from the departure place to the current position; Creating an eco-drive information guide and a driving warning point information guide based on the result of the evaluation, and displaying the map image including the entire process of the guide route on the screen of the display means. It may include a display of drive information guidance or driving warning point information guidance, and before the step of displaying a map image including the entire process of the guidance route on the screen of the display means, the travel distance from the departure place to the current position is determined. A step of detecting, a step of detecting a travel time from the departure location to the current location, a step of calculating a remaining distance from the current location to the destination, and a destination location A map image including a step of calculating an estimated arrival time at the time and a step of creating a travel information guide including the travel distance, travel time, remaining distance, and expected arrival time, and including the entire route of the guide route The step of displaying on the screen of the display means may include displaying the travel information guidance screen.

  Further, in the map display method according to this aspect, the step of creating the eco-drive guidance information and the driving warning point guidance information calculates an average fuel consumption between points where the ACC is turned off from the starting point to the current point. And calculating the average fuel consumption from the starting point to the current point where each ACC is turned off. The eco-driving guide information and the driving warning point guide information may be created. The step of calculating the number of points for each predetermined section obtained by subtracting a predetermined number of points from a predetermined reference point based on the value of the vehicle acceleration based on the vehicle acceleration recorded during the travel from the departure point to the current point. And a step of creating an evaluation graph based on the evaluation score calculated for each of the predetermined sections. The step of creating live guidance information and driving warning point guidance information includes a step of extracting a point where an acceleration exceeding a predetermined acceleration or a steering angle exceeding a predetermined steering angle is detected, and a step of creating a driving evaluation at the point And displaying the map image including the entire process of the guidance route on the screen of the display means may include a step of displaying the point.

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

(Configuration of in-vehicle navigation system)
FIG. 1 is a block diagram showing a configuration of an in-vehicle navigation device according to an embodiment of the present invention.

  In the figure, 1 is a DVD-ROM drive, and 1a is a storage medium in which map data and other guidance data are stored. In the present embodiment, the DVD-ROM 1a is used as a storage medium for storing such data, but a hard disk or other storage medium may be used. The map stored here is divided into longitude and latitude widths of appropriate sizes according to each scale level such as 1/1500, 1/25000, 1 / 50,000, 1/10000, etc. Roads, buildings, facilities, and other various properties included in are stored as a coordinate set of points (nodes) expressed in longitude and latitude. Map data includes (1) a road layer composed of a road list, a node table, an intersection configuration node list, etc., (2) a background layer for displaying roads, buildings, parks, rivers, etc. on a map image, (3) It consists of a character / symbol layer or the like for displaying a letter indicating a administrative division name such as a municipality name, a road name, an intersection name, or a map symbol.

  The DVD-ROM 1a stores road data representing the shape of the road used for map matching. This road data is composed of a shape node and a link between shape nodes having different distances between nodes according to the shape of the road.

  An operation unit 2 is provided with operation buttons and the like for operating the navigation apparatus body 10. In this embodiment, the operation unit 2 includes a remote control transmitter, and the user can also operate the navigation apparatus body 10 with the remote control transmitter at hand.

  Also, 3 receives GPS signals sent from a plurality of GPS satellites and generates and outputs GPS data such as longitude, latitude, PDOP (Position DOP) value and HDOP (Horizontal DOP) value of the current position of the vehicle. A GPS receiver is shown.

  Reference numeral 4 denotes various sensors, including a self-contained navigation sensor, an acceleration sensor, and a steering angle sensor. The self-contained navigation sensor includes an angle sensor such as a gyro that detects a vehicle rotation angle, and a travel distance sensor that generates a pulse at every constant travel distance. The acceleration sensor is a sensor that detects the operation state of the brake, and the steering angle sensor is a sensor that detects the operation state of the steering wheel.

  Reference numeral 5 denotes a communication device such as an in-vehicle telephone for communicating with various service centers, and 6 denotes a VICS receiver that receives VICS (road traffic information communication system) information transmitted from a radio wave beacon or an optical beacon. These beacons are installed on the roadside and connected to police stations, road managers and integration centers to provide information on traffic jams in the vicinity.

  Reference numeral 7 denotes a display unit such as a liquid crystal panel. The navigation device body 10 displays a map around the current position of the vehicle on the display unit 7, a guidance route from the departure point to the destination, a vehicle mark, Other guidance information is displayed. The display unit 7 is provided with a touch panel on the screen, and is configured with various buttons paired with the display content of the display screen. The touch panel serves as an input device for selecting a menu or the like indicated by these various buttons. Reference numeral 8 denotes a speaker for providing guidance information to the user by voice.

  The navigation device body 10 is composed of the following. Reference numeral 11 denotes a buffer memory that temporarily stores map data read from the DVD-ROM 1 a via the DVD-ROM drive 1.

  Reference numeral 12 denotes a control unit constituted by a microcomputer. The control unit 12 has a built-in navigation program, and calculates the current position of the vehicle based on a signal output from the GPS receiver 3 or a signal output from the self-contained navigation sensor 4 according to the program. Or the map data to be displayed is read from the DVD-ROM 1a to the buffer memory 11 via the DVD-ROM drive 1 or from the departure place under the search conditions set using the map data read to the buffer memory 11. Various processes such as searching for a guidance route to the destination are executed. In addition, as will be described later, the point where the ACC is turned off due to the parking or stopping of the vehicle is recorded, the driving situation such as the acceleration value of the vehicle is monitored and recorded during traveling, or after the ACC is turned off. It is determined that ACC is turned on, and a process including displaying a map including the entire guidance route is performed.

  13 is a map drawing unit for generating a map image using the map data read out to the buffer memory 11, and 14 is for generating various menu screens (operation screens) and various marks such as vehicle position marks and cursors according to the operation status. This is the operation screen / mark generator.

  Reference numeral 15 denotes a guide route storage unit that stores the guide route searched by the control unit 12, and 16 denotes a guide route drawing unit that draws the guide route. The guidance route storage unit 15 stores all the nodes of the guidance route searched by the control unit 12 from the departure point to the destination. When displaying the map, the guide route drawing unit 16 reads the guide route information from the guide route storage unit 15 and draws the guide route with a color and line width different from those of other roads.

  Reference numeral 17 denotes a storage unit composed of a hard disk or the like, which stores information on the driving situation of the vehicle and the point where the vehicle ACC is turned off. In addition, route information on which the vehicle has actually traveled is stored.

  An audio output unit 18 supplies an audio signal to the speaker 8 based on a signal from the control unit 12. Reference numeral 19 denotes an image composition unit, which overlays the map image drawn by the map drawing unit 13 with various marks and operation screens generated by the operation screen / mark generation unit 14, the guide route drawn by the guide route drawing unit 22, and the like. Display on the display unit 7.

  In the vehicle-mounted navigation device 100 configured as described above, a travel guidance display when the ACC is turned on from the state where the ACC is turned off will be described with reference to FIGS. 2 to 6 show guide screens displayed on the screen of the display unit 7. FIG. 2 is a “travel information guide screen” 20 in which travel information is displayed overlaid on a map image 21 including a guide route. FIG. 3 illustrates eco-drive information on a map image 31 including a guide route. Is an “eco-drive information guidance screen” 30 displayed in a superimposed manner, and FIG. 4 is a “driving caution information guidance screen” in which driving caution point information is superimposed and displayed on a map image 41 including a guidance route. 40.

  When the guidance route is set, ACC is turned off during traveling according to guidance of the guidance route, and then ACC is turned on from the state where ACC is turned off, the traveling information guidance screen 20 of FIG. 2 is displayed. Also, the guidance screens shown in FIGS. 2 to 4 can be switched with each other.

  When the ACC of the host vehicle is turned on and the vehicle is departed again, the control unit 12 of the in-vehicle navigation device 100 does not display the map image at the scale of the route guidance image displayed immediately before the ACC is turned off. Are adjusted to a scale so that the entire guidance route including both the starting point and the destination point of the guidance route is displayed.

  FIG. 2 shows that after setting the starting point S and the destination D of the guidance route, the vehicle travels according to the guidance of the guidance route, stops the vehicle engine by a break on the way, and then turns on the ACC at the point X again. A travel information guidance screen 20 displayed on the screen is shown. The travel information guide screen 20 is displayed with a map information 21 and a travel information image 22 superimposed on the map screen 21. The map image 21 displays a guide route (28, 29), and a host vehicle position mark CM indicating the current position of the host vehicle is displayed on the guide route (28, 29). The entire route from the departure point S to the destination D is displayed as the guidance route, and the route 28 from the departure point S to the vehicle position mark CM and the route 29 from the vehicle position mark CM to the destination are different. (For example, different colors). When traveling according to the guidance of the guidance route, the traveling route is the same as the guidance route, but when traveling along a route different from the guidance route, the route actually traveled is displayed.

  The travel information image 22 displays the travel information content up to the destination D based on the travel results from the departure point S to the current point X. The travel information includes a destination 24a, a travel distance 24b, a travel time 24c, a remaining distance 24d, an estimated arrival time 24e, and a travel summary 24f. Among these, the destination 24a is extracted from the guide route storage unit 15, and the travel distance 24b is a distance from the departure point S to the point of the vehicle position mark CM, and is calculated based on the map data. Further, the estimated arrival time 24e is calculated from the distance (remaining distance 24d) from the point of the vehicle position mark CM to the destination D and the traveling speed. The travel summary 24f records the display indicating how far the entire travel route has traveled from the travel distance 24b and the remaining distance 24d, and the number of times the engine has been stopped during travel. It is displayed as the number of breaks.

  In the travel information image 22, a related menu for acquiring various information related to the route can be selected. Related menu items include “Destination Display” 25a for displaying a map around the destination, “Route Details” 25b for displaying a process guide for the guidance route, and another point between the destination D There are prepared “route point setting” 25c for designating to stop by and “periphery search” 25d for searching for facilities around the vehicle position.

  Display switching buttons 23a and 23b are provided on the travel information guide screen 20. By selecting these buttons, it is possible to shift to another guide screen.

  FIG. 3 shows a guidance screen displayed when ACC is turned on, and shows an “eco-drive information guidance screen” 30 different from FIG. The eco-drive information guide screen 30 is composed of a map image 31 and an eco-drive information image 32 displayed so as to be superimposed on the map image. As with the map image 21 in FIG. 2, the map image 31 displays the entire guidance route including the departure point S and the destination D of the guidance route. In the map image 31 on the eco-drive information guide screen 30, the route (37, 38) on which the guide route has been traveled and the route 29 on which the travel has not been performed are displayed in different manners, and the rest on the route (37, 38) that has been traveled If a point exists, the rest point (35, 36) is displayed. In FIG. 3, a first break point 35 and a second break point 36 are displayed. These break points are points where ACC is turned off and the engine is stopped.

  The eco-drive information image 32 relates to the average fuel consumption (33a, 33b) from the departure point S to each rest point (35, 36), the average fuel consumption 33c of the section of the break point, the eco-drive point 34, and eco-drive. A comment 39 is included.

  Among these, the eco-drive point 34 is obtained by scoring driving technologies related to fuel efficiency such as accelerator operation and brake operation, and the eco-drive point image 34 shown in FIG. 3 is displayed as a graph. is doing.

  The eco-drive point 34 in FIG. 3 is graphed for the evaluation from the departure point S to the second break point 36. Thus, instead of displaying all the sections that have been traveled at once, a predetermined section may be displayed and displayed so as to scroll forward and backward.

  Here, the eco-drive score calculation method will be described. Calculate how much eco-driving is possible, that is, how much driving can contribute to improving fuel efficiency, by subtracting the number corresponding to the degree of driving against fuel efficiency improvement from the predetermined reference score. ing. This score is calculated for each section of a predetermined travel distance. That is, if eco-driving is performed in a predetermined section, the score is a predetermined reference score (for example, 100 points).

  If the vehicle does not have sudden braking or sudden start, it is determined that the vehicle is traveling in an environmentally friendly manner with a low degree of danger. As one method of this determination, a deduction point is defined by the acceleration or deceleration value at a predetermined speed of the vehicle, and the evaluation score in the section is calculated based on the deduction point measured every predetermined time in the section. Graph based on the number of points in each section.

For example, when the speed is 40 to 60 km / h, the deduction point at the acceleration α is 100 × α ^2, and the deduction point is “1” at 0.1 G. Further, when the speed is 60 to 80 km / h, the deduction point at the acceleration α is (1600/9) × α ^2, and the deduction point is set to “1” at 0.075G. Other speed ranges are also defined, and in each speed range, a similar deduction point calculation formula is defined, and the deduction points are calculated according to the speed.

  Display switching buttons 23a and 23b are also provided on the eco-drive information guidance screen 30. By selecting these buttons, it is possible to shift to another guidance screen.

  FIG. 4 is a guidance screen displayed when ACC is turned on, and shows a “driving warning point guidance screen” 40 different from FIG. 2 or 3. The driving warning point guide screen 40 is composed of a map image 41 and a driving warning point information image 42 displayed on the map image. Similar to the map image of FIG. 2 or 3, the map image 41 displays the entire guidance route including the departure point S and the destination D of the guidance route. In the map image 41 on the driving warning point guide screen 40, the route on which the guide route has been traveled and the route not yet traveled are displayed in a different manner, and if there is a rest point on the route that has been traveled, between the rest points The display mode is also displayed differently. Further, a mark indicating where the driving operation point is determined to be dangerous (driving warning point) is displayed. In FIG. 4, three driving warning points (46a, 46b, 46c) are displayed.

  The driving warning point information image 42 includes driving warning points (43a, 43b, 43c) and driving evaluations at the respective points. In the driving warning point information image 42 of FIG. 4, a driving evaluation 44a of “XX point, accelerator operation is complicated” is displayed for the driving warning point 43a, and “XX point” is displayed for the driving warning point 43b. The driving evaluation 44b is displayed. Further, a driving evaluation 44c is displayed for the driving warning point 43c, “ΔΔ point, sudden braking has occurred”. Furthermore, “details” buttons 45a to 45c are prepared for the respective driving warning points, and detailed information for the driving warning points is displayed.

  Switching buttons 23a and 23b are also prepared on the driving warning point information guidance screen 40. By selecting these switching buttons, the “driving information guidance screen” 20 in FIG. 2 or the “eco-driving information guidance” in FIG. "Screen 30" can be entered.

  FIG. 4 shows a case where there are three driving warning points. When there are many driving warning points, a scroll button is displayed on the driving warning point information image, and the scroll warning button is selected to display the driving warning point information image. You may make it refer to the other point which is not displayed. A driving warning point mark is displayed at this point so as to indicate a driving warning point in conjunction with the map image.

  In the driving warning point guide image of FIG. 4, the value of the evaluation criterion determined as the driving warning point may be set to a higher risk value. In this case, the number of driving warning points to be displayed is reduced, so that the complexity is eliminated and the driving warning points can be displayed on a wide-area map display.

  FIG. 5 shows a driving warning point information guidance screen 50 in which the map scale is specified in the “driving warning point information guidance screen” 40 of FIG. 4 and the map display is detailed. This “driving warning point information guidance screen” 50 is also configured with a map image 51 and a driving warning point information image 52 displayed on the map image in the same manner as in FIG. Unlike the map images of FIGS. 2 to 4, the map image 51 displays a part of the guide route. In FIG. 5, marks indicating driving warning points are displayed at four locations (57a, 57b, 57c, 57d).

  The driving warning point information image 52 includes driving warning points (53a, 53b, 53c, 53d) and driving evaluations at the respective points. For example, in the driving warning point information image 52 of FIG. 5, driving evaluation “ΔΔ point, sudden braking has occurred” is displayed for the driving warning point 53c. Further, a “detail” button is prepared for each driving warning point, and detailed information for the driving warning point is displayed.

  Switching buttons 58a and 58b are also prepared on the driving warning point information guide 50 of FIG. By selecting this switching button, it is possible to shift to the “travel information guide screen” 20 in FIG. 2 or the “eco-drive information guide screen” 30 in FIG.

  Scroll buttons (56a, 56b) are also provided in the driving warning point information image of FIG. 5, and other driving warning points outside the range of the displayed map can be displayed by scrolling. In conjunction with this display change of the driving warning point, the map image is also moved and displayed so that the driving warning point displayed in the driving warning point image is displayed.

  In the case of a narrow map display as shown in FIG. 5, if the evaluation reference value is set to a high risk value, the corresponding point may not be displayed at all. You may make it make the value of evaluation criteria into a value with a low risk rather than a case.

  FIG. 6 shows a detailed display image displayed when the “details” button of the driving warning point is selected in the driving warning point guide image of FIG. 4 or FIG. FIG. 6 is a detailed display screen when the detail button of the warning point 53c is selected in the driving warning point information image 52 of FIG. In this detailed display screen, the map image 61 is the same as the map image 51 of FIG. 5, and a detailed information image 62 is displayed on the map image 61. In the detailed information image 62, the selected driving warning point 63, the driving warning point content 64, and the detailed information 65 are displayed. In addition, a “break” button 67 and a “return” button 66 are prepared.

  The detailed information 65 displays detailed information of the driving warning point, and the driving situation and advice for driving at the point. The “break” button 67 is a button for searching for facilities around the vehicle position at the time when the detailed information screen 60 of FIG. 6 is displayed. Although it has the same function as the “peripheral search” in FIG. 2, the facility search can be immediately performed when a warning about driving is displayed and it is felt that a break is necessary.

  Further, on the detailed information screen 60, switching buttons 69a and 69b are prepared. By selecting this switch button, it is possible to shift to a detailed information screen regarding other driving warning points.

  As described above with reference to FIGS. 2 to 6, in the in-vehicle navigation device of the present embodiment, the guidance route is set, and the ACC is turned off while traveling according to the guidance of the guidance route. When the ACC is turned on from the state where is turned off, the map image is displayed by adjusting the scale so that the entire guidance route including the departure point and the destination of the guidance route is displayed. The vehicle position is displayed on the guidance route, and the route from the departure point to the vehicle position and the route from the vehicle position to the destination are displayed in different modes. As a result, it is possible to know at a glance how far the vehicle has traveled on the route to the destination, which is beneficial to the driver. In addition, the driver can omit the operation of displaying the entire guidance route at the time of departure, which can contribute to safe driving.

  In addition, the display of the entire guidance route including the departure point and the destination of the guidance route is not only displayed when the ACC is turned on from off, but also by the user's instruction via the operation means even when the vehicle is running. Alternatively, a map display of the entire guidance route as shown in FIG. 2 may be performed.

  Next, a map display method performed in the in-vehicle navigation device 100 according to the present embodiment will be described. The guidance display process when the ACC is on in the map display method will be described in detail with reference to the flowcharts of FIGS.

  FIG. 7 is a flowchart showing an example of a re-starting guidance process when the vehicle stops along a guidance route and stops at a certain point in the middle and starts the vehicle again. FIG. 8 is a flowchart showing an example of the travel guide generation process, FIG. 9 is a flowchart showing an example of the eco guide generation process, and FIG. 10 is a flowchart showing an example of the driving warning point guide generation process.

  In the re-departure guidance process, a route search for a guidance route to the destination is performed, and data on the guidance route including the departure point and the destination is stored in the guidance route storage unit 15 and the guidance of the set guidance route is set. It is assumed that the vehicle is traveling according to Further, it is assumed that the control unit 12 constantly monitors the driving situation while the vehicle is traveling, detects sudden acceleration, and stores the traveling data in the storage unit 17.

  First, in step S11 of FIG. 7, it is detected whether or not the vehicle ACC is turned off. For example, when the vehicle is parked during a break or the like while traveling according to the guidance route guidance. When the ACC is detected to be off, the process proceeds to step S12.

  In the next step S12, a point where the ACC is turned off is detected and the information is stored in the storage unit 17, and traveling data indicating a driving situation where the vehicle has traveled from the departure point to the point where the ACC is turned off is stored. The travel data indicating the driving situation includes a point and its value when the vehicle suddenly brakes or suddenly starts at a predetermined acceleration or higher, and a point and its value at which a steering angle equal to or higher than a predetermined value is detected.

  In the next step S13, it is detected whether or not ACC is turned on again. When ACC is turned on, the process proceeds to step S14.

  In the next step S14, a map image including the entire guidance route from the departure point to the destination is generated. It is also possible to store a map image of a scale that is displayed including the starting point and the destination at the time of searching for the guide route, and use this map image. Further, when the vehicle travels outside the guidance route from the departure point, the route data actually traveled is extracted from the storage unit 17, and the scale and the guidance route from the point where the ACC is turned on to the destination are displayed. The map image is generated by adjusting to.

  For this map image, a point where the ACC is turned on again (restart point) is detected, and the route from the start point to the restart point is different from the route from the restart point to the destination. To do.

  In the next step S15, the travel data to the ACC-off point stored in the storage unit 17 is extracted, and various guides such as a travel guide, an eco guide, and a driving warning point guide are created based on the travel data. . Various types of guidance creation processing will be described later.

  In the next step S16, any one of the travel guides created in step S15 (for example, travel information guide) is synthesized on the map image generated in step S14 and displayed on the display screen.

  In the next step S17, it is determined whether or not a predetermined time has elapsed since the ACC was turned on. The predetermined time may be, for example, about 5 seconds or until the vehicle travels. When the predetermined time has elapsed, the process proceeds to step S21, and when the predetermined time has not elapsed, the process proceeds to step S18.

  In the next step S18, it is determined whether or not there is an instruction to switch the screen display. The screen display is switched when, for example, the display switching button (23a, 23b) on the guidance screen of FIGS. 2 to 4 is selected. When there is such a switching instruction, the process proceeds to step S22, and when there is no switching instruction, the process proceeds to step S19.

  In the next step S19, it is determined whether or not there is a menu selection on the travel guidance screen. The menu of the travel guidance screen corresponds to, for example, selection of a related menu in the travel information image 22 in FIG. 2 or a detailed button in the driving warning point information image in FIG. When these menus are selected, the process proceeds to step S20, and when there is no menu selection, the process proceeds to step S17 to monitor the elapse of a predetermined time.

  In the next step S20, a screen according to the menu selected in step S19 is displayed, and this process ends.

  On the other hand, when there is a screen display switching instruction in step S18, the guidance screen is switched and displayed according to the instruction, and the process proceeds to step S17 to monitor the elapse of a predetermined time.

  If the predetermined time has elapsed in step S17, the process proceeds to step S21, and the guidance route from the current location is displayed together with the map around the host vehicle at the scale when ACC is turned off, and normal route guidance is continued. This process ends.

  Next, the travel guidance creation process in step S15 will be described with reference to the flowcharts of FIGS. FIG. 8 is a flowchart illustrating an example of the travel guide information generation process, and FIG. 9 is a flowchart illustrating an example of the eco guide information generation process. FIG. 10 is a flowchart illustrating an example of the driving warning point information generation process.

  First, in step S31 in FIG. 8, the ACC-off point is acquired from the storage unit 17.

  In the next step S32, the departure point at the time of setting the guidance route is acquired from the guidance route storage unit 15, and the travel distance from the departure point to the point where the ACC is off is calculated. If the vehicle is traveling along the guidance route, the distance from the route information stored in the guidance route storage unit to the ACC-off point may be calculated. Further, when traveling away from the guidance route, the distance actually traveled is calculated from the storage unit in which travel information is recorded and stored.

  In the next step S33, the travel time from the departure point at the time of setting the guidance route to the point where the ACC is off is calculated. This travel time is calculated from the departure time at the departure place and the time when the ACC is off.

  In the next step S34, the remaining distance to the destination and the estimated arrival time at the destination are calculated. The remaining distance to the destination is calculated by referring to the route information stored in the guide route storage unit 15 and the distance from the ACC off point to the destination. Further, the estimated arrival time of the destination is calculated based on, for example, the speed limit of the guidance route and the remaining distance.

  In the next step S35, the number of times of rest until the ACC off point is detected. After starting from the departure point of the guidance route, a record of a point where the ACC is turned off by, for example, stopping the vehicle is extracted from the storage unit 17 and the number of times is detected.

  In the next step S36, a travel guidance image including the above-mentioned data (travel distance, travel time, remaining distance, estimated arrival time, number of breaks) is created, and this process ends.

  Next, the eco-guide information generation process will be described with reference to the flowchart of FIG.

  First, in step S41 in FIG. 9, each ACC-off point is acquired from the storage unit 17.

  In the next step S42, an average fuel consumption is calculated from the starting point at the time of setting the guidance route to each point where the ACC is turned off.

  In the next step S43, an average fuel consumption between points where ACC is turned off is calculated.

  In the next step S44, an eco-drive evaluation graph is created. Based on the values of the vehicle acceleration and the like recorded in the storage unit 17, the eco-drive score is calculated for each predetermined section, and the score is graphed to obtain an eco-drive evaluation graph. The eco-driving score for each section is calculated by preliminarily deducting points according to the acceleration when traveling at a predetermined speed and subtracting the points according to the acceleration from the reference score. ing.

  In the next step S45, an eco-drive information image including the average fuel consumption and eco-drive evaluation graph calculated in each of the above steps is generated, and this process ends.

  Next, driving warning point information generation processing will be described with reference to the flowchart of FIG.

  First, in step S51 of FIG. 10, a point (driving warning point) with a low eco-drive evaluation score is extracted. This driving warning point corresponds to a point where sudden braking, sudden start, or sudden steering is detected. With respect to the acceleration, deceleration, or steering angle recorded in the storage unit 17 as travel data, a value exceeding the threshold value of the acceleration, deceleration, or steering angle indicating the degree of danger, and its point are extracted.

  In the next step S52, a driving evaluation at a driving warning point is created. For example, when the deceleration exceeds a predetermined threshold, a driving situation such as “A sudden braking has occurred” is created.

  In the next step S53, a driving warning point and a driving warning point information image including a driving evaluation are generated, and this process ends.

  As described above, according to the map display method of the present embodiment, a guidance route is set, ACC is turned off while traveling according to the guidance of the guidance route, and ACC is turned on when ACC is turned off. In this case, the map image is displayed with the scale adjusted so that the entire guide route including the starting point and the destination of the guide route is displayed. The vehicle position is displayed on the guidance route, and the route from the departure point to the vehicle position and the route from the vehicle position to the destination are displayed in different modes. As a result, it is possible to know at a glance how far the vehicle has traveled on the route to the destination, which is beneficial to the driver.

  In addition, based on data related to driving such as sudden braking and sudden starting that occurred until the point where ACC was turned on again, a guidance image showing where eco-driving is possible or where dangerous driving operations were performed, etc. It is created and displayed with a map image. As a result, it is possible to urge the driver to refrain from dangerous driving and to perform environmentally friendly driving in the remaining steps to the destination.

It is a block diagram which shows the structure of the vehicle-mounted navigation apparatus which concerns on one Embodiment of this invention. FIG. 2 is a diagram showing an example of a guidance screen (running information guidance screen) displayed when ACC is turned on after ACC is turned off in the vehicle-mounted navigation device according to FIG. 1. FIG. 2 is a diagram showing an example of a guidance screen (eco-drive information guidance screen) displayed when ACC is turned on after ACC is turned off in the vehicle-mounted navigation device according to FIG. 1. FIG. 2 is a diagram showing an example of a guidance screen (driving warning guidance screen) displayed when ACC is turned on after ACC is turned off in the vehicle-mounted navigation device according to FIG. 1. It is a figure which shows an example when the map image of the driving warning guidance screen of FIG. 4 is made into detailed display. It is a figure which shows an example of the screen which shows the detailed information of the driving warning point in the driving warning guidance screen of FIG. 4 or FIG. It is a flowchart which shows an example of the guidance process at the time of the restart in the vehicle-mounted navigation apparatus which concerns on FIG. It is a flowchart which shows an example of a driving guidance information generation process. It is a flowchart which shows an example of an eco-guide information generation process. It is a flowchart which shows an example of a driving | operation warning location information generation process.

Explanation of symbols

100: In-vehicle navigation device,
1a ... DVD-ROM (storage means),
2 ... operation part (input means),
3 GPS receiver (own vehicle position detection means),
7: Display section (display means),
10 ... navigation device body,
11: Buffer memory,
12 ... Control part (control means),
15 ... Guidance route storage unit (storage means),
17 ... Storage part (storage means),
20, 30, 40, 50, 60 ... guide screen,
21, 31, 41, 51, 61 ... map image,
22 ... Running information image,
28, 29 ... guide route,
32 ... Eco-drive information image,
42 ... Driving warning point information image.

Claims (20)

A vehicle-mounted navigation device having a function of searching for a guidance route to a destination and guiding a vehicle along the guidance route,
Display means;
Storage means for storing map data;
Own vehicle position detecting means for detecting the current position of the own vehicle;
Based on the map data together with the current position of the host vehicle for a predetermined period after it is detected that the ACC is turned on again after the ACC is turned off in the course of traveling according to the guidance route guidance. Control means for displaying on the screen of the display means a map image including the entire guidance route from the starting point to the destination of the created guidance route;
A vehicle-mounted navigation device comprising: Furthermore, an input means for inputting a user instruction is provided,
2. The control unit according to claim 1, wherein when the instruction to display the entire guidance route is detected while the vehicle is traveling, a map image including the entire guidance route is displayed on a screen of the display unit. The in-vehicle navigation device described.   The control means, when displaying a map including the entire guidance route, eco-drive information guidance or driving warning point information guidance created based on the evaluation of the driving situation of the vehicle from the departure place to the current position, or The in-vehicle navigation device according to claim 1, wherein a travel information guide created based on information on a current position with respect to the entire route of the guidance route is displayed together.   When the predetermined period has elapsed, the control means displays the guidance route from the current vehicle position to the destination on the screen of the display means at a specified scale before the ACC is turned on. The in-vehicle navigation device according to claim 1 or 2.   The control means calculates the travel distance from the departure location to the current location, the travel time from the departure location to the current location, the remaining distance from the current location to the destination, and the estimated arrival time to the destination, The in-vehicle navigation device according to claim 3, wherein the navigation device is displayed in an information guide.   Whether the control means displays a map around the destination, displays a process guide for the guidance route, or adds a waypoint according to a user's instruction while the travel information guide is displayed. 4. The in-vehicle navigation device according to claim 3, wherein a search for nearby facilities is performed.   The in-vehicle navigation device according to claim 3, wherein the control means displays the travel information guidance, eco-drive information guidance, or driving warning point information guidance according to a user instruction on the map display screen.   4. The vehicle-mounted navigation according to claim 3, wherein the control means calculates a fuel consumption between points where ACC is turned off from a starting point to a current point, and displays the fuel consumption on the eco-drive information guide. 5. apparatus. Furthermore, an acceleration sensor for detecting the acceleration of the vehicle is provided,
The in-vehicle use according to claim 3, wherein the control means displays an eco-drive evaluation calculated based on a vehicle acceleration recorded during travel from the departure place to the current location in the eco-drive information guide. Navigation device.   The in-vehicle use according to claim 9, wherein the eco-drive evaluation is displayed in a graph based on a score for each predetermined section obtained by subtracting a predetermined score from a predetermined reference point according to a vehicle acceleration value. Navigation device. Furthermore, an acceleration sensor for detecting the acceleration of the vehicle,
Equipped with a steering angle sensor for detecting the steering angle,
The control means determines that the driving is dangerous when an acceleration exceeding a predetermined acceleration or a steering angle exceeding a predetermined steering angle is detected, records the point determined to be the dangerous driving, and places the point on the map. The in-vehicle navigation device according to claim 3, wherein the on-vehicle navigation device displays the contents of the dangerous driving in the driving warning point information guide.   The said control means displays the driving | running route from the said departure place to the said own vehicle position, and the guidance route from the said own vehicle position to the said destination in a different aspect, The Claim 1 or 2 characterized by the above-mentioned. Car navigation system. A map display method implemented in an in-vehicle navigation device having a function of searching a guidance route to a destination and guiding a vehicle along the guidance route,
Detecting the current position of the host vehicle;
Detecting that the ACC is turned on again from the ACC being turned off;
Obtaining the entire route of the guide route;
Creating a map image including the entire process of the guidance route;
After detecting that the ACC is turned on, displaying a map image including the entire route of the guidance route together with the current position of the host vehicle on the screen of the display means;
After a predetermined period of time has passed since the ACC is turned on, the screen of the display means is displayed on the screen of the guidance means from the current position to the destination at a scale before the ACC is turned on. Steps to display on the screen;
A map display method characterized by comprising: Before displaying the map image including the entire process of the guidance route on the screen of the display means,
Evaluating the driving situation of the vehicle from the departure location to the current location;
Based on the result of the evaluation, creating eco-driving information guidance and driving warning point information guidance,
Have
The step of displaying a map image including the entire process of the guidance route on the screen of the display means,
The map display method according to claim 13, comprising displaying the eco-drive information guide or the driving warning point information guide. Before displaying the map image including the entire process of the guidance route on the screen of the display means,
Detecting the distance traveled from the departure location to the current location;
Detecting the travel time from the departure location to the current location;
Calculating the remaining distance from the current position to the destination;
Calculating the estimated arrival time to the destination;
Creating a travel information guide including the travel distance, travel time, remaining distance, and estimated arrival time;
Have
The step of displaying a map image including the entire process of the guidance route on the screen of the display means,
The map display method according to claim 13, comprising displaying the travel information guide screen. The step of creating the eco-drive guidance information and the driving warning point guidance information includes
Calculating an average fuel consumption between points where the ACC is off from the starting point to the current point;
Calculating the average fuel consumption from the starting point to the current point where each ACC is off,
The map display method according to claim 14, further comprising: The step of creating the eco-drive guidance information and the driving warning point guidance information includes
Calculating a score for each predetermined section obtained by subtracting a predetermined score from a predetermined reference point based on the acceleration value of the vehicle based on the vehicle acceleration recorded during traveling from the departure point to the current point; ,
Creating an evaluation graph based on the evaluation score calculated for each predetermined section;
The map display method according to claim 14, further comprising: The step of creating the eco-drive guidance information and the driving warning point guidance information includes
Extracting a point where an acceleration exceeding a predetermined acceleration or a steering angle exceeding a predetermined steering angle is detected;
Creating a driving evaluation at the point;
Including
The map display method according to claim 14, wherein the step of displaying a map image including the entire process of the guidance route on a screen of a display unit includes a step of displaying the point. The step of creating a map image including the entire process of the guidance route includes:
The map display method according to claim 13, further comprising a step of making the travel route from the departure location to the vehicle position different from the travel route from the vehicle location to the destination. The step of creating the travel information guide includes:
16. The method includes generating a selection key for selecting a map around a destination, displaying a process guide for a guidance route, adding a waypoint, or searching for a nearby facility. The map display method described in 1.

Images