JP3585720B2 - Car navigation system - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a list display of a plurality of registered points on a display device, and a vehicle-mounted navigation device having a function of setting a point selected by a user from these registered points as a destination or a waypoint. The present invention relates to a registered point list display method and a vehicle-mounted navigation device for realizing the registered point list display method.
[0002]
[Prior art]
The in-vehicle navigation device includes a map data storage device such as a CD-ROM or a DVD-ROM in which map data is recorded, a display device, a current position and a current direction of the vehicle such as a gyro, a GPS (Global Positioning System), and a vehicle speed sensor. A self-contained navigation sensor or the like that detects the vehicle position, reads map data including the current position of the vehicle from the map data storage device, draws a map image around the vehicle position on the display screen based on the map data, The mark (location) is superimposed on the display screen and displayed, and the map image is scrolled according to the movement of the vehicle, or the map image is fixed on the screen and the vehicle position mark is moved, so that the vehicle You can see at a glance if you are running.
[0003]
In addition, usually, the in-vehicle navigation device is equipped with a route guidance function that enables a user to easily travel to a desired destination without making a mistake on a road. According to this route guidance function, the lowest cost route from the starting point to the destination is automatically searched by performing a simulation calculation such as the horizontal search method or the Dijkstra method using the map data, and the searched route is guided. The route is stored as a route, and during driving, the guidance route is drawn on the map image in a different color from the other roads and displayed thickly, or displayed on the screen, or a certain distance to the intersection where the vehicle should change the route on the guidance route When approaching the inside, the user is guided to the destination by drawing an arrow indicating the course at the intersection where the course should be changed on the map image and displaying it on the screen.
[0004]
The cost is a value obtained by multiplying a constant based on a road width, a road type (such as a general road or an expressway), a right turn, a left turn, and the like based on the distance, a predicted traveling time of a vehicle, and the like. Is a numerical value of the degree of appropriateness. Even if there are two routes having the same distance, the cost may be different by specifying, for example, whether or not to use a toll road, whether to give priority to traveling distance or traveling time, or the like. Become.
[0005]
A map stored in a map data storage device such as a CD-ROM has longitude and latitude widths of appropriate sizes according to scale levels such as 1 / 12,500, 1/25000, 1/50000, and 1/100000. Roads and the like are separated and stored as a coordinate set of vertices (nodes) represented by longitude and latitude. A road is formed by connecting two or more nodes, and a portion connecting the two nodes is called a link. The map data includes (1) a road layer including a road list, a node table, and an intersection configuration node list; (2) a background layer for displaying roads, buildings, facilities, parks, rivers, and the like on a map screen; (3) It is composed of a character / symbol layer for displaying characters such as names of administrative divisions such as municipalities, road names, intersection names and building names, and map symbols.
[0006]
By the way, in-vehicle navigation devices are generally capable of registering points such as homes and frequently visited places. For example, when a cursor is moved to a desired position on a map displayed on a display device and a predetermined operation is performed, the navigation device stores the longitude and latitude of the point. At this time, the navigation device acquires a character string located near the cursor position from the map data as a name of a registered point (hereinafter, referred to as a registered point), and stores the character string in association with the registered point. In addition, the registration point name can be arbitrarily changed by the user. In a general in-vehicle navigation device, about 50 to 100 points can be registered.
[0007]
The registered point registered by the user in this manner can be used for setting a destination and a waypoint. For example, when setting a registered point as a destination, a registered point list can be displayed as shown in FIG. 7, and a desired registered point can be selected from the list and set as a destination. This facilitates the setting of the destination as compared with the method of displaying the map image and specifying the destination with the cursor.
[0008]
[Problems to be solved by the invention]
However, in the above-described conventional method of displaying the registered point list of the in-vehicle navigation device, the registered point name is simply displayed as shown in FIG. 7. Sometimes it is not possible to know where is and why it was registered, and the data of the registered location may not be used effectively.
[0009]
From the above, the object of the present invention is not to simply display a list of registered point names, but it is easy to recall where the registered point is, what the registered point is, and so on. It is an object of the present invention to provide a registered point list display method capable of using data more effectively and a vehicle-mounted navigation device that realizes the registered point list display method.
[0010]
[Means for Solving the Problems]
The above-described problem is solved by a map data storage unit that stores map data, a registered point storage unit that stores a position of a registered point, a point name, and a registered point display mark, and a plurality of storage units that are stored in the registered point storage unit. Control means for reading map data around the point from the map data storage means, and a list display map image of a predetermined size is drawn from the map data read by the control means for each point together with the stored mark. Image drawing means, and image combining means for combining and displaying a plurality of list display map images of the list display map images drawn by the image drawing means on one screen, and the control means comprises: When one list display map image is selected from a plurality of list display map images displayed on one screen, the list display map image corresponding to the selected list display map image is selected. To display a map of the surrounding of the recording point to the entire screen be solved by a vehicle-mounted navigation device according to claim.
[0012]
Hereinafter, the operation of the present invention will be described.
In the in-vehicle navigation device according to the present invention, the list drawing map image of each registered point is drawn by the image drawing means, and the plurality of list display images are synthesized on one screen by the image synthesis means. As a result, the roads and buildings around the registered point can be seen at a glance, and it is helpful to remember where the registered point is, what the registered point is, and the like. For example, when registering the location of an acquaintance's house, it is difficult to remember what the registered point is simply by displaying the name of the nearby intersection, etc., but a map around the registered point as in the present invention Is displayed, it is easy to remember where the registered point is or what the registered point is.
[0013]
However, if only a map of one point is displayed on one screen, it takes time to search for a desired point when many points are registered. For this reason, it is necessary to display maps of a plurality of registration points on one screen.
[0014]
In this case, if a list display map image storage unit is provided and the list display map image created by the image drawing unit is stored, a list display map image is created when the list is displayed next time. Can be omitted, and the time until the list is displayed can be reduced.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a block diagram showing a vehicle-mounted navigation device according to an embodiment of the present invention.
Reference numeral 1 denotes a CD-ROM (or DVD-ROM: the same applies hereinafter) storing map data. The CD-ROM 1 stores a road layer, a background layer, and a character / symbol layer. Reference numeral 2 denotes an operation unit provided with various operation buttons (a menu button, an enter button, and the like) for operating the navigation device body 10 described later, a joystick, and the like.
[0016]
Reference numeral 3 denotes a GPS receiver that receives a GPS signal transmitted from a GPS satellite and detects the longitude and latitude of the current position of the vehicle. Reference numeral 4 denotes a self-contained navigation sensor. The self-contained navigation sensor 4 includes an angle sensor 4a such as a gyro that detects a vehicle rotation angle, and a traveling distance sensor 4b that generates a pulse for each predetermined traveling distance. Reference numeral 7 denotes a liquid crystal display device, and the navigation device main body 10 displays a map around the current position of the vehicle on the display device 7, guides a route from a departure point to a destination, a vehicle position mark, and other guidance information. Is displayed. The display device 7 is provided with six function keys as a part of the operation unit 2 in a horizontal direction below the screen display unit as described later.
[0017]
Reference numeral 8 denotes a speaker, and the navigation device body 10 transmits various kinds of guidance information by voice through the speaker 8.
The navigation device main body 10 includes the following. Reference numeral 11 denotes a buffer memory for temporarily storing map data read from the CD-ROM 1. Reference numeral 12 denotes an interface connected to the operation unit 2, 13 denotes an interface connected to the GPS receiver 3, and 14 denotes an interface connected to the self-contained navigation sensor 4. Reference numeral 17 denotes a control unit. The control unit 17 detects the current position of the vehicle based on various types of information input from the interfaces 13 and 14, and reads map data of a predetermined area from the CD-ROM 1 to the buffer memory 11. Or search for an optimal guidance route from the departure place to the destination under the set search conditions.
[0018]
Reference numeral 18 denotes a map drawing unit that generates a map image using the map data stored in the buffer memory 11. Reference numeral 20 denotes a guidance route storage unit that stores the guidance route searched by the control unit 17, and reference numeral 21 denotes a guidance route drawing unit that draws a guidance route. The guidance route storage unit 20 records all nodes of the guidance route searched by the control unit 17 from the departure place to the destination. When displaying the map, the guide route drawing unit 21 reads the guide route information (node sequence) from the guide route storage unit 20 and draws the guide route in a color and line width different from those of other roads.
[0019]
Reference numeral 19 denotes an operation screen / mark generation unit that generates various menu screens (operation screens) and various marks such as a vehicle position mark and a cursor according to the operation status.
Reference numeral 22 denotes an audio signal generator. A plurality of voice messages are recorded in the voice signal generation unit 22 in advance, and a predetermined voice message is output to the speaker 8 according to a signal from the control unit 17.
[0020]
Reference numeral 23 denotes an image synthesizing unit, which superimposes, on the map image drawn by the map drawing unit 18, various marks and operation screens generated by the operation screen / mark generation unit 19, the guidance route drawn by the guidance route drawing unit 21, and the like. Display on the display device 7.
Reference numeral 24 denotes a registered point storage unit in which registered point data is stored. When the user moves the cursor to a desired position on the map displayed on the display device 7 and presses a predetermined button of the operation unit 2, the control unit 17 detects the longitude / latitude of the cursor position, and detects the vicinity of the cursor position. Is acquired, and these data are stored in the registered point storage unit 24 as registered point data.
[0021]
In the in-vehicle navigation device configured as described above, the control unit 17 detects the current position of the vehicle from the GPS signal received by the GPS receiver 3 and the signal input from the self-contained navigation sensor 4, and detects the current position of the vehicle from the CD-ROM 1. The map data of the area including the current position of the vehicle is read out to the buffer memory 11. The map drawing unit 18 generates a map image using the map data read into the buffer memory 11 and displays the map image around the vehicle on the display device 7.
[0022]
Further, the control unit 17 uses the map data read out to the buffer memory 11 to detect the position of the vehicle detected by a signal input from the GPS receiver 3 and the self-contained navigation sensor 4 with the movement of the vehicle, using the map data read from the buffer memory 11. (Map matching). Then, the control unit 17 controls the operation screen / mark generation unit 19 to display the vehicle position mark superimposed on the map image displayed on the display device 7, and moves the vehicle position mark with the movement of the vehicle. Or scroll the map image.
[0023]
Further, when the user operates the operation unit 2 to set a destination, the control unit 17 sets the current position of the vehicle as the departure point, searches for a guidance route from the departure point to the destination, and stores the search result in the guidance route storage. The guidance route is superimposed on the map image and displayed in the storage unit 20. Then, guidance information is output as appropriate as the vehicle travels, and the vehicle is guided along the guidance route to the destination.
[0024]
Hereinafter, the operation of the in-vehicle navigation device according to the present embodiment at the time of point registration will be described. When registering a point, a map image is displayed on the screen of the display device 7 as shown in FIG. Then, the user operates the operation unit 2 to move the cursor 30 to the position to be registered, and presses the “OK” button of the operation unit 2. Then, as shown in FIG. 3, the boxes of "destination", "passing point", and "point registration" are displayed on the screen. Here, when the user operates the joystick of the operation unit 2 to select the “point registration” box (the color of the selected box changes) and presses the “OK” button of the operation unit 2, the control unit 15 Detects the longitude / latitude of the cursor position using the map data read into the map buffer 11, and stores the longitude / latitude in the registered point storage unit 16 as registered point data. At this time, the control unit 17 acquires a character string located near the cursor position from the map data and sets the character string as a registered point name. This registration point name can be changed by the user. In addition, the user can select a mark (for example, a flag or a house mark) to be used when displaying the registered location in a map from a plurality of marks prepared in advance.
[0025]
FIG. 4 is a schematic diagram illustrating a data structure of the registered point data recorded in the registered point storage unit 24. As shown in FIG. 4, the registered point storage unit 24 stores, for each registered point data, position data (longitude / latitude), registered point name data, and mark data indicating the type of mark. Further, a comment, a telephone number, or the like can be added as detailed information.
[0026]
FIG. 5 is a schematic diagram showing a registered point list displayed on the screen of the display device 7 by the navigation device of the present embodiment, and FIG. 6 is a flowchart showing the registered point list display method.
When the “menu” button of the operation unit 2 is pressed by the user, a menu screen (not shown) is displayed. When “point registration” is selected from the menu screen, the processing shown in FIG. 6 is started. That is, in step S <b> 1, the control unit 17 reads one point registration data from a plurality of registration point data stored in the registration point storage unit 24. Then, the process proceeds to step S2, and the map data (for example, map data of 1 / 12,500) around the registered point is read out to the buffer memory 11 from the map data stored in the CD-ROM 1. The map drawing unit 18 draws a map based on the map data read into the buffer memory 11, and draws a map of a predetermined size (eight map images per screen) from the drawn map image. (A size that can be displayed) is cut out to create a list display map image. At this time, in order to display a wider range, the map image drawing unit 18 may reduce the drawn map image to, for example, １ ／ and use it as a list display map image. Then, the process proceeds to step S3, where the map drawing unit 18 superimposes the registered point name and the icon on the list display map image, and then proceeds to step S4 to output the list display map image to the image combining unit 23. I do.
[0027]
Next, the process proceeds to step S5, and the control unit 17 checks whether or not all the registered point data has been read from the registered point storage unit 24. If all the registered point data has not been read (NO), the process returns to step S1, reads the next registered point data, and continues the processing of S2 to S4.
In this way, when map images for list display are created for all registered points and output to the image combining unit 23, the process proceeds from step 5 to step S6. In step S6, the screen synthesis unit 23 synthesizes the list display map image input from the map drawing unit 18 and divides the screen of the display device 7 into eight regions as shown in FIG. A registered point list on which a map image for displaying a list of registered points is displayed is generated and displayed on the display device 7.
[0028]
In FIG. 5, a registration point surrounded by a thick frame (cursor) indicates that it is selected. The user can move the cursor by operating the joystick of the operation unit 2. Also, move the cursor to the right end (or left end) of the screen and tilt the joystick right (or left) to scroll the screen right (or left) and display the list of the next registered point The map image is displayed.
[0029]
Further, as described above, six function keys are provided below the screen display section of the display device 7 in a horizontal direction, and five of these function keys are provided on the display screen of FIG. , "Return", "Information", "Erase", "Map display", and "Destination set" are set. For example, when the user presses the "return" key, the screen returns to the menu screen, and when the user presses the "information" key, detailed information (comment or telephone number, etc.) added to the data of the registration point selected by the cursor is displayed. You. When the "delete" key is pressed, the data of the registered point selected by the cursor is deleted from the registered point storage unit 24. Further, when the "map display" key is pressed, a map of the registered point selected by the cursor is displayed on the entire screen, and when the "destination set" key is pressed, the registered point selected by the cursor is set as the destination, and the vehicle is displayed. A search for a guidance route from the current position of the vehicle to the destination is started.
[0030]
In the present embodiment, as described above, when the display of the registered point list is instructed, the map image for displaying the list of the registered points is displayed on the display screen, so that the user can recognize the position of the registered point at a glance, You can easily remember where the registration point is and what you registered for. As a result, the data of the registered points can be effectively used, and the effect of greatly improving the usability of the in-vehicle navigation device can be obtained.
[0031]
In the present embodiment, a list display map image is generated for all registered point data, and eight list display map images are simultaneously displayed on the display device. Since the number of list display map images displayed at a time is large as described above, a desired registered point can be easily searched from a large number of registered points.
The list display map image formed by the map drawing is preferably stored in the registered point storage unit 24 or the like. Accordingly, when the registered points are displayed next in a list, the processing from step S1 to step S5 in FIG. 6 can be omitted, and the time required for the list display is reduced.
[0032]
Further, in the above-described embodiment, a case has been described in which points registered by the user are displayed in a list. However, the present invention can also be applied to a case in which points registered in advance by a manufacturer are displayed in a list.
[0033]
【The invention's effect】
As described above, the in- vehicle navigation device of the present invention has an image drawing unit and an image combining unit, and the image drawing unit draws a list display map image of each registered point. Since the map image for list display is combined on one screen, the roads and buildings around the registered point can be seen at a glance, and it is easy to recall where the registered point is or what it was registered for. it can. As a result, the data of the registered points can be effectively used.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an on-vehicle navigation device according to an embodiment of the present invention.
FIG. 2 is a diagram showing a screen display example (part 1) at the time of point registration.
FIG. 3 is a diagram showing a screen display example (part 2) at the time of point registration.
FIG. 4 is a schematic diagram showing a data structure of registration point data.
FIG. 5 is a schematic diagram showing a registration point list displayed on a screen of a display device by the on-vehicle navigation device according to the embodiment of the present invention.
FIG. 6 is a flowchart showing a registered point list display method.
FIG. 7 is a flowchart showing a registered point list display by a conventional on-vehicle navigation device.
[Explanation of symbols]
1 CD-ROM,
2 operation part,
3 GPS receiver,
4 self-contained navigation sensors,
7 display device,
8 speakers,
10 navigation device body,
11 buffer memory,
12-14 interface,
17 control part,
18 Map drawing unit,
19 Operation screen / mark generator,
20 guidance route storage unit,
21 guidance route drawing unit,
22 audio output unit,
23 Image synthesis unit,
24 Registered point storage unit.

Claims (2)

Map data storage means for storing map data;
Registered location storage means for storing the location of the registered location, location name and registered location display mark ,
Control means for reading map data around a plurality of points stored in the registered point storage means from the map data storage means;
Image drawing means for drawing a list display map image of a predetermined size from the map data read by the control means for each point together with the stored mark ;
Image synthesizing means for synthesizing and displaying a plurality of list display map images among the list display map images drawn by the image drawing means on one screen ,
When one list display map image is selected from among the plurality of list display map images displayed on one screen, the control unit is configured to display a map around the registration point corresponding to the selected list display map image. An in-vehicle navigation device characterized by displaying a map on a full screen . 2. The in-vehicle navigation device according to claim 1, further comprising a list display map image storage unit that stores each list display map image drawn by the map drawing unit.

Images