JP4169949B2 - Car navigation system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an in-vehicle navigation device that guides a vehicle to a destination according to a guidance route, and more particularly, to an in-vehicle navigation device having a function of displaying a building, a facility, or other various properties that are marks when the vehicle is traveling on a display screen. The present invention relates to a navigation device.
Unless otherwise defined in the following description, the term “vehicle” simply refers to the own vehicle.
[0002]
[Prior art]
Conventional typical vehicle-mounted navigation devices include map data storage devices such as CD-ROMs and DVD-ROMs that store map data, display devices, gyros, GPS (Global Positioning System) receivers, and vehicle speed sensors. Vehicle movement detection means for detecting the current position and current direction is provided. Then, map data around the current position of the vehicle is read from the map data storage device, a map image is displayed on the display screen based on the map data, and a vehicle position mark (own vehicle) is displayed at a predetermined location on the map image. Mark) is displayed in a superimposed manner, and as the current position changes according to the movement of the vehicle, the map image is fixed on the screen and the vehicle position mark is moved, or the vehicle position mark is fixed at a predetermined position such as the center of the screen. Then, the map image is scrolled and displayed so that it is always possible to know at a glance where the vehicle is currently traveling.
[0003]
Also, 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 a desired destination without making a mistake. According to this route guidance function, an optimal route (for example, the route with the lowest cost) connecting from the departure point (for example, the current position of the vehicle) to the destination using the map data is searched for by the horizontal search method, Dijkstra method, etc. The calculated route is automatically searched, the searched route is stored as a guide route, and the guide route can be distinguished from other roads on the map image while traveling (for example, the color is changed, When the vehicle approaches a predetermined distance to the intersection where the course should be changed on the guidance route, a guide map of the intersection (an enlarged view of the intersection and the intersection) is displayed on the map image. Or an arrow indicating the traveling direction of the user), the user can grasp the optimum route to the destination.
[0004]
When searching for a route, the user sets a destination in advance, and further sets a passing point on the way to the destination (that is, which route goes to the destination) as necessary. Also, if necessary, various conditions (whether priority is given to toll roads or priority is given to general roads, which of the reductions in travel distance or travel time is prioritized) are also set. The navigation device searches for a plurality of routes to the destination based on the set data, displays the searched routes in different colors, for example, and provides route guidance according to one route selected by the user. .
[0005]
In recent years, map data storage devices such as CD-ROMs in in-vehicle navigation devices include not only map data but also information such as business types, addresses, telephone numbers, etc. regarding various properties such as stores, banks, companies, and public facilities (so-called “ Some town page information ") is included. The town page information can be used to search for a desired property designated by the user on the display screen.
[0006]
In addition, as a display method for providing map information to a user in a conventional vehicle-mounted navigation device, there is so-called three-dimensional display (3D display) for displaying a map three-dimensionally. In this 3D display, various properties such as buildings and facilities designated by user settings, roads, and the like are displayed three-dimensionally on the screen, and the display is performed as if the building is actually running in a turbulent building. Is called.
[0007]
[Problems to be solved by the invention]
According to the in-vehicle navigation device having a 3D display function, buildings, roads, and the like are three-dimensionally displayed as described above, so that the user can feel as if he or she is actually traveling in a valley of buildings. Can be given.
However, 3D display by a conventional in-vehicle navigation device has a problem that a low building or a road is hidden behind a high building, making it difficult to understand a building that serves as a landmark when the vehicle is traveling. In addition, in the conventional in-vehicle navigation device, the difference between the property with the town page information (hereinafter referred to as “town page property”) and the other property (hereinafter referred to as “general property” for convenience) on the map. There was also a problem that it was difficult to distinguish.
[0008]
The applicant of the present application has previously proposed a technique for solving such inconvenience (Japanese Patent Application No. 2000-283308, filed on September 19, 2000). In this application specification and the like, in a three-dimensional map display method of an in-vehicle navigation device that is mounted on a vehicle and displays a map image on a display device to guide the vehicle to a destination, a threshold value is changed according to a display scale. A three-dimensional map display method for an in-vehicle navigation device is described, in which a building higher than the threshold is displayed in a three-dimensional manner and a building lower than the threshold is displayed in a plane. And among the buildings to be displayed three-dimensionally, by displaying a building of a certain height or higher that can be a mark at the time of vehicle traveling, with a non-transparent image, and displaying other buildings with a transparent or semi-transparent image This solves the problem of low buildings and roads hidden behind high buildings. In addition, among buildings that are higher than the threshold, only buildings to which specific information such as town page information is added are three-dimensionally displayed, so that it is easy to distinguish between town page properties and general properties.
[0009]
On the other hand, when route guidance is performed by an in-vehicle navigation device having a 3D display function, it is normal for the user to drive the vehicle using various properties such as buildings and facilities displayed in 3D as landmarks. . In this case, if the user is not aware of what the property is currently watching, that is, what the name (property name) of the property is, the vehicle cannot travel smoothly. For this reason, when various properties such as buildings and facilities are displayed in 3D on the screen, it is conceivable to display the property name of the property in association with the display of each property.
[0010]
However, none of the conventional in-vehicle navigation devices having a 3D display function has a function of displaying a property name for a property displayed in 3D on the screen. In addition, some conventional navigation devices that have a function to display a property such as a building in a two-dimensional manner have a function that additionally displays a property name. It was based.
[0011]
As described above, in the in-vehicle navigation device having the conventional 3D display function, the property name is not displayed in association with the property displayed in 3D on the screen. When the screen is viewed, it is impossible to immediately recognize what each property is, and therefore, there is a problem in that smooth running of the vehicle is affected.
[0012]
The present invention is intended to provide an in-vehicle navigation device having a display function obtained by further developing the 3D display function of the in-vehicle navigation device previously proposed by the applicant of the present application. The object is to display various properties such as buildings and facilities that serve as landmarks when the vehicle travels in a display mode (visual display mode) appealing to the user's vision, thereby further improving the visibility.
[0013]
Another object of the present invention is to display a property name in association with the property when the designated property is displayed in a visual display form on the screen, and thus the correspondence between each property and the property name. It is to make it easy to grasp and to contribute to smooth vehicle travel.
[0014]
[Means for Solving the Problems]
In order to solve the above-described problems of the prior art, according to the present invention, information input means for inputting information related to map display designated by the user, display means for providing guidance information to the user via the screen, and building Data storage that stores map data including property drawing data related to 3D display (or flat display) including data indicating property type for each property, facility, and other properties, and attribute data including property height information And each map color selectively designated from among a plurality of map colors serving as a base of the map display via the information input means, respectively, are set according to the type and height of each property. a display mode storage means for storing a display mode table according to the visual display containing the data indicating the color display mode of each property was, the information input means, display means, data storage means and the display mode Symbol Display control means operatively connected to each means, and the display control means, when the three-dimensional map display (or planar map display) is designated via the information input means, With reference to the display mode table, a visual display mode corresponding to the designated property is determined, and the property is displayed in a three-dimensional display (or plane display) in the determined visual display mode on the screen of the display means. A vehicle-mounted navigation device is provided.
[0015]
According to the vehicle-mounted navigation device according to the present invention, the display control means is configured to display the property drawing data when the designated property serving as a mark when the vehicle travels is displayed three-dimensionally (or planarly) on the screen of the display means. Since the visual display mode of the property is determined based on the display mode table and the property is displayed in the determined visual display mode, when the user views this screen while the vehicle is running, the vehicle It is possible to improve the visibility of a property that becomes a landmark during traveling.
In the display mode table of the present invention, the color display mode corresponding to the type of each property and its height for each map color (color that is the base of the map display) that is selectively specified based on a user instruction. Therefore, the visual display mode of the property is determined with reference to these color display modes, and the property is displayed in the determined display mode, so that the surrounding situation (eg, It is possible to perform more accurate visual display according to a bright day such as daytime or a dark nighttime. This contributes to further improvement in visibility.
[0016]
Further, according to the present invention, in the above-described in-vehicle navigation device, the property drawing data stored in the data storage unit includes data indicating a property name for each property, and the display control unit includes the An in-vehicle navigation device is provided that displays a property name in association with the property when the designated property is displayed in a visual display form on a screen.
[0017]
According to the vehicle-mounted navigation device according to this aspect, when a designated property that serves as a landmark during vehicle travel is displayed in a visual display form on the screen of the display means, the property of the property is associated with the display of each property. Since the name is additionally displayed, the correspondence between each property and the property name can be immediately and easily grasped when the user views this screen while the vehicle is traveling. This contributes to smooth vehicle travel.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a block diagram showing the overall configuration of an in-vehicle navigation device according to an embodiment of the present invention.
In the figure, reference numeral 1 denotes a CD-ROM storing map data, and the map stored here is appropriate for each scale level such as 1/1500, 1/25000, 1 / 50,000, 1/10000, etc. The roads, buildings, facilities, and other various properties included in this map are stored as a coordinate set of points (nodes) expressed in longitude and latitude. Yes. A road is composed of two or more nodes connected to each other, and a portion connecting two nodes is called a “link”. The 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 is composed of a character / symbol layer or the like for displaying a letter indicating an administrative division name such as a municipality name, a road name, an intersection name, names of various properties (property name), a map symbol, or the like.
[0019]
Reference numeral 2 denotes an operation unit for operating a navigation apparatus main body 10 to be described later, 3 denotes a communication device such as an in-vehicle telephone for communicating with various service centers, etc., 4 denotes a VICS (VICS (received from a radio wave beacon or an optical beacon). Road traffic information communication system) VICS receiver that receives information, 5 is a GPS receiver that receives GPS signals sent from GPS satellites and detects the longitude and latitude of the current position of the vehicle, 6 is a self-contained navigation sensor Show. The self-contained navigation sensor 6 is composed of an angle sensor 6a such as a gyro for detecting the vehicle direction, and a distance sensor 6b that generates a pulse for every predetermined traveling distance. Reference numeral 7 denotes a liquid crystal display device. Under the control of the navigation device body 10, a map around the current position of the vehicle, a guide route from the departure point to the destination, a vehicle position mark, and other guidance information. Etc. are displayed on the screen. Reference numeral 8 denotes a speaker for providing guidance information to the user by voice.
[0020]
In the navigation apparatus main body 10, reference numeral 11 denotes a buffer memory for temporarily storing map data read from the CD-ROM 1 under the control of the control unit 17 described later, and 12, 13, 14, 15 and 16 are respectively operated. The interface (I / F) connected to the part 2, the communication apparatus 3, the VICS receiver 4, the GPS receiver 5, and the self-contained navigation sensor 6 is shown. Reference numeral 17 denotes a control unit constituted by a microcomputer. The control unit 17 has a built-in navigation program (a program for performing display output control necessary for route search processing and route guidance based on the program). According to this program, the GPS receiver 5 and the autonomous navigation are provided. Based on the signal output from the sensor 6, the current position of the vehicle is detected, the map data to be displayed is read from the CD-ROM 1 to the buffer memory 11, or the map data read to the buffer memory 11 is used. Various processes related to navigation, such as searching for a guidance route from the departure point (current position of the vehicle) to the destination under the set search conditions, are performed.
[0021]
Reference numeral 18 denotes a map drawing unit that performs a map image drawing process using map data read out to the buffer memory 11 under the control of the control unit 17, and 19 denotes various menu screens (operation screens) according to the operation status. ), An operation screen / mark generating unit for generating various marks such as a vehicle position mark and a cursor, and 20 denotes a guidance route storage unit for storing guidance route data. In this guidance route storage unit 20, data on all nodes (coordinates of points expressed in longitude and latitude) from the starting point to the destination of the guidance route searched by the control unit 17 and changed during the search. Guide route data is recorded. Further, 21 is a guidance route drawing that reads the guidance route data from the guidance route storage unit 20 under the control of the control unit 17 and draws the guidance route in a display mode (color, line width, etc.) different from other roads. Reference numeral 22 denotes an audio output unit that outputs an audio signal to the speaker 8 based on a signal from the control unit 17.
[0022]
Reference numeral 23 denotes a display mode table storage unit that stores a display mode table related to visual display of various properties preset by the user. Details of the display mode table stored here will be described later. Reference numeral 24 denotes an image composition unit. The map image drawn by the map drawing unit 18 includes a guide route drawn by the guide route drawing unit 21, an operation screen generated by the operation screen / mark generation unit 19, and various marks. Are appropriately stacked and displayed on the screen of the display device 7. As will be described later, the image composition unit 24 displays three-dimensional displays of various properties such as buildings and facilities that are marks when the vehicle travels on the screen of the display device 7 under the control of the control unit 17. It also has a function of displaying various properties in a visual display mode with reference to the display mode table stored in the display mode table storage unit 23.
[0023]
FIG. 2 shows an external configuration of a remote control transmitter constituting the operation unit 2.
As shown in the figure, the remote control transmitter 30 is provided with a joystick 31, a “decision” button 32, a “menu” button 33, a “return” button 34, and other various operation buttons. The joystick 31 and the “OK” button 32 are integrally configured. By tilting the joystick 31 up and down, left and right, various menus (including menus related to 3D display) displayed on the screen of the display device 7, various types You can select items, etc., and move the cursor on the screen (screen scroll). On the other hand, by pressing the “OK” button 32, you can execute the selected menu, etc. Any point can be specified. The “menu” button 33 is operated to display a desired main menu / submenu on the screen, and the “return” button 34 is operated to return to the previous screen.
[0024]
FIG. 3 shows the data structure of the property drawing data (polygon data for drawing buildings, facilities, and other various properties) included in the map data stored in the CD-ROM 1.
As shown in FIG. 3A, polygon data for drawing a building or the like is expressed as a set of a plurality of nodes (G1 to G6 in the illustrated example), and an end point (G6) and a start point (G1) are represented. Connected to form a closed figure. As shown in FIG. 3B, the polygon data (property drawing data) includes data indicating a property name, data indicating a property type, data regarding attributes such as the shape and height of the property, and the like. And data relating to coordinates at which the property is located on the map image. Here, the type of property indicates the genre (public facility, commercial facility, other facility) to which the property belongs. For example, in the case of a public facility, the public cultural facility, hospital, school, This indicates which property of the transportation facility. Similarly, in the case of commercial facilities, it indicates which property is a large store, small store, bank, accommodation facility, etc., and in the case of other facilities, it is an office, factory, entertainment facility, restaurant This indicates which property is a miscellaneous building or the like. The attribute data includes data indicating the polygon type, outline color, line type (solid line, broken line, line width, etc.), node color and fill color (color inside the polygon). In the case of a town page property, the property number and the number of floors (height) of the building are included for each property. That is, the polygon data is linked to the town page information through the property number. The coordinate data includes the coordinates of the nodes G1 to G6 of the polygon.
[0025]
FIG. 4 shows an example of the display mode table stored in the display mode table storage unit 23.
The display mode table is selectively selected from the map colors (four colors of A (clear), B (mist), C (camel), and D (urban) in the illustrated example) as a base of the map display according to user settings. For each color specified in the above, data indicating the color display mode (density, pattern, etc.) uniquely set according to the type and height of each property is included. In the example shown in the figure, each property type (public facility, commercial facility, other facility) has three property heights (floor H), that is, h1 ≦ H <h2, h2 ≦ H <h3, h3 ≦ H, and different color display modes (shading of each color a, b, c, patterning (texture mapping)) are set for each of the divided ranges. Note that the threshold values (h1, h2, h3) for dividing the height (floor H) of each property into three ranges are set as, for example, h1 = 4F, h2 = 10F, and h3 = 20F.
[0026]
In the configuration according to the present embodiment, the CD-ROM 1 is a “data storage unit”, the operation unit 2 is an “information input unit”, the display device 7 is a “display unit”, and the control unit 17 and the image composition unit 24 are “ The display mode table storage unit 23 corresponds to the “display mode storage unit”.
The vehicle-mounted navigation device according to the present embodiment is basically the same as described later, except that the operation mode when the three-dimensional display in the visual display mode together with the city map of various properties and the like serving as landmarks when the vehicle is running is different. The following operations are performed in the same manner as a conventional vehicle-mounted navigation device.
[0027]
That is, the control unit 17 detects the current position of the vehicle based on the GPS signal received by the GPS receiver 5 and the signal detected by the self-contained navigation sensor 6. Then, map data around the current position of the vehicle is read from the CD-ROM 1 and stored in the buffer memory 11. The map drawing unit 18 generates a map image based on the map data read to the buffer memory 11 and displays a map image around the current position of the vehicle on the display device 7.
[0028]
Further, the control unit 17 detects the current position of the vehicle based on signals output from the GPS receiver 5 and the self-contained navigation sensor 6 as the vehicle moves, and displays it on the display device 7 according to the detection result. The vehicle position mark is overlaid on the map image, and the vehicle position mark is moved as the vehicle moves, or the map image is scroll-displayed.
[0029]
Further, when the user operates the operation unit 2 (remote control transmitter 30) to set the destination, the control unit 17 sets the current position of the vehicle as the starting point, and the route with the lowest cost connecting the starting point to the destination. Is searched using the map data of the CD-ROM 1. Then, the route obtained by the search is stored as a guide route in the guide route storage unit 20, and the guide route is displayed on the map image. In addition, the control unit 17 appropriately outputs guidance information as the vehicle travels, and guides the vehicle to travel along the guidance route to the destination.
[0030]
As a basic feature of the in-vehicle navigation device according to the present embodiment, when various properties such as a designated building that serves as a landmark at the time of vehicle traveling are displayed in 3D on the display screen, Based on the height and the map color specified by the user setting, each property is displayed in a visual display mode appealing to the user's vision. By setting it as this visual display aspect, the visibility with respect to the property used as the guide mark at the time of vehicle travel can be improved.
[0031]
As a further feature, when a specified property (in this embodiment, a property with a height of 4F or more) is displayed in 3D in a visual display manner on the display screen, the property is associated with each property display. The property name is additionally displayed. That is, a range for displaying each property name on the screen (hereinafter, also referred to as “property name display area”) is defined above each corresponding property, and the property name is displayed in the area. In this way, the display mode with the property name added allows the user to easily grasp the correspondence between each property and the property name when the user views this screen while the vehicle is running, and thus smooth. This can contribute to vehicle travel.
[0032]
In addition, when demarcating property name display areas for individual properties to be displayed in 3D, it is assumed that the property name display areas overlap each other if the properties are dense on the map image. In such a case, in this embodiment, the map image displayed on the screen is divided into a plurality of grids (display categories), and it is determined whether or not the property name display areas overlap for each grid. In this case, the property name (property name display area) is displayed only for one property according to a predetermined priority.
[0033]
In this case, the priority order related to the property name display is designated based on the user setting for each genre to which each property belongs. For example, public facilities (public cultural facilities, hospitals, etc.) are given the first priority, commercial facilities (large / small stores, banks, etc.) are given the second priority, and other facilities (offices, factories, residential buildings, etc.) Is the third priority.
In addition, for a property other than a designated property to be displayed in 3D (a property having a height of 4F or more), normal planar display is performed. The floor number of the property (in this case, 4F), which is a determination criterion for performing 3D display or flat display for each property, is specified based on the user setting from the operation unit 2 (remote control transmitter 30). The reason why the number of 3D-displayed properties is limited to some properties in this way is that when 3D display is performed for all properties, the screen becomes difficult to see.
[0034]
FIG. 5 shows an example of a screen display related to the 3D map display performed by the navigation device of the present embodiment, and FIG. 6 shows an example of the visual display processing of the property related to the 3D map display. is there.
In the screen display example shown in FIG. 5, the vehicle position mark CM indicating the current position of the vehicle is displayed superimposed on the map image 41 displayed three-dimensionally on the display screen 40, and the property specified by the user setting 42a to 42e are displayed in 3D. In the illustrated example, in order to make the drawing easy to see, an example of screen display when each of the articles 42a to 42e to be displayed in 3D is displayed in a transparent or semi-transparent manner is shown.
[0035]
FIG. 6 shows a display example when the visual display processing of the property is performed in the color display mode corresponding to the property determined from the display mode table shown in FIG. In the illustrated example (see FIGS. 6A and 6B), for each of the map colors A and B specified by the user setting, the height of the property (public facility) (4F-9F, 10F-19F, 20F or more), the display color a (see FIG. 4) is displayed in 3D in different display modes. That is, when the property is 4F-9F, the display color a is “light”, when it is 10F-19F, the display color a is “dark”, and when it is 20F or more, “patterning (texture mapping)”. Has been given.
[0036]
FIG. 7 shows another example of the screen display related to the three-dimensional map display performed by the navigation device of the present embodiment.
In the screen display example shown in FIG. 7, as in the screen display example shown in FIG. 5, the property 42 a to 42 e specified by the user setting is transmitted through the map image 41 on the display screen 40 together with the vehicle position mark CM. It is displayed in 3D with a transparent display mode, and the property names (○ △ Post Office, △△ Department Store, OO Wholesale Market, Citizen Center, XX Library) that indicate each property 42a to 42e are displayed. Yes. That is, a range for displaying individual property names (property name display areas 43a to 43e) is additionally displayed in association with the property. About the visual display of each property 42a-42e, it carries out similarly to the method illustrated in FIG.
[0037]
As described above, according to the in-vehicle navigation device according to the present embodiment, based on the control from the control unit 17, a designated building or the like that serves as a mark when the vehicle travels on the screen of the display device 7. When 3D display is performed on the property, based on the property drawing data (FIG. 3) included in the map data stored in the CD-ROM 1 and the display mode table (FIG. 4) stored in the display mode table storage unit 23. Thus, the visual display mode of the property is determined, and the property is displayed in the determined visual display mode (FIG. 6).
[0038]
Thereby, when the user views this screen during traveling of the vehicle, it becomes possible to improve the visibility with respect to the property that becomes a landmark during traveling of the vehicle.
Further, as described above, in the display mode table (FIG. 4), for each map color selectively specified based on the user instruction, a unique color display mode corresponding to the type of individual property and its height Therefore, the visual display mode of the property is determined with reference to these color display modes, and the property is displayed in the determined display mode, so that the surrounding situation (eg, It is possible to perform a more accurate visual display according to a bright day such as daytime or a dark nighttime. This contributes to further improvement in visibility.
In addition, when a property that serves as a landmark when driving a vehicle is displayed in 3D on a display screen in a visual display mode, a property name (property name display areas 43a to 43e) is additionally displayed in association with the display of the property. (FIG. 7) When the user views this screen while the vehicle is running, it is possible to immediately and easily grasp the correspondence between each property and the property name, thereby contributing to smooth vehicle travel. it can.
[0039]
Furthermore, since the number of properties to be displayed in 3D is limited to some properties (a property with a height of 4F or more), it is possible to eliminate the difficulty in viewing the screen when 3D display is performed for all properties. .
(Deformation)
In the above-described embodiment, the case has been described in which when a property such as a building is displayed in 3D on the display screen, the property is displayed in the three-dimensional visual display mode illustrated in FIG. As is clear from the gist of the invention, the visual display mode is not limited to a 3D-displayed property, and can be similarly applied to a property that is displayed two-dimensionally.
[0040]
Although not shown in particular, the visual display mode of the property to be displayed in a plane is determined based on the table equivalent to the property drawing data (FIG. 3) and the display mode table (FIG. 4) described above, and the property is It is possible to perform planar display in the determined visual display mode. Specifically, for each map color (A, B, C, D shown in FIG. 4) specified by the user setting, the type of each property (public facility, commercial facility, other facility) and its Depending on the height (for example, 3F or less, 4F to 9F, 10F or more), the property is planarly displayed in different color display modes (for example, light blue, normal blue, and dark blue). By adopting such a display mode, even in the same type of property, the height of the property can be recognized by the shade of the display color. In addition, by increasing the amount of shadow shift (number of dots) that is more similar to a category having a higher property height, the height of the property can be recognized according to the width of the shadow.
[0041]
[Effect of the present invention]
As described above, according to the present invention, in order to display a three-dimensional display (or two-dimensional display) of an object such as a building that serves as a mark when the vehicle is running in the vehicle-mounted navigation device, the object is appealed to the user's vision. By displaying in the visual display mode, it is possible to improve the visibility for the property.
In addition, in the display mode table characterizing the present invention, the color display mode according to the type of each property and its height is set for each map color selectively specified based on the user instruction. By determining the visual display mode of the property with reference to these color display modes and displaying the property in the determined display mode, a more accurate visual display according to the surrounding situation when the vehicle is running is performed. Can contribute to further improvement of visibility.
[0042]
In addition, when displaying a specified property in a visual display mode, by displaying the property name in association with the property, the correspondence between each property and the property name can be easily grasped, and smooth vehicle driving Can contribute.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an overall configuration of an in-vehicle navigation device according to an embodiment of the present invention.
2 is a plan view showing an external configuration of an operation unit (remote control transmitter) in FIG. 1. FIG.
FIG. 3 is a diagram showing a data structure of property drawing data (polygon data) included in map data.
FIG. 4 is a diagram illustrating an example of a display mode table.
FIG. 5 is a diagram illustrating an example of a screen display related to a three-dimensional map display.
6 is a diagram for explaining an example of a visual display process of a property related to the three-dimensional map display of FIG. 5;
FIG. 7 is a diagram illustrating another example of a screen display related to a three-dimensional map display.
[Explanation of symbols]
1 ... CD-ROM (data storage means)
2. Operation unit (information input means)
5 ... GPS receiver 6 ... Independent navigation sensor 7 ... Display device (display means)
17. Control unit (display control means)
18 ... Map drawing unit 19 ... Operation screen / mark generating unit 20 ... Guidance route storage unit 21 ... Guidance route drawing unit 23 ... Display mode table storage unit (display mode storage means)
24. Image composition unit (display control means)
30 ... Remote control transmitter 31 ... Joystick 32 ... "OK" button 40 ... Display screen 41 ... Map images 42a-42e ... 3D displayed properties 43a-43e ... Property name display range (Property name display area)
CM: Vehicle position mark

Claims (4)

Information input means for inputting information related to the map display specified by the user;
Display means for providing guidance information to the user via a screen;
Data storage means storing map data including property drawing data relating to stereoscopic display including data indicating the type of property for each building, facility, and other various properties, and attribute data including property height information ;
Each property set according to the type of each property and its height for each map color selectively designated from among the map colors serving as the bases of the map display via the information input means Display mode storage means for storing a display mode table related to visual display including data indicating each color display mode ;
Display control means operatively connected to the information input means, display means, data storage means and display mode storage means,
The display control means determines a visual display mode corresponding to the specified property by referring to the property drawing data and the display mode table when a three-dimensional map display is specified via the information input unit. , on the screen of the display unit, the vehicle-mounted navigation device in which the property is characterized in that is three-dimensional display in the visual display mode to the determined. Information input means for inputting information related to the map display specified by the user;
Display means for providing guidance information to the user via a screen;
Data storage means storing map data including property drawing data relating to flat display including data indicating the type of property for each building, facility, and other various properties and attribute data including property height information ;
Each property set according to the type of each property and its height for each map color selectively designated from among the map colors serving as the bases of the map display via the information input means Display mode storage means for storing a display mode table related to visual display including data indicating each color display mode ;
Display control means operatively connected to the information input means, display means, data storage means and display mode storage means,
The display control means determines a visual display mode corresponding to the specified property by referring to the property drawing data and the display mode table when a planar map display is specified via the information input unit. An on-vehicle navigation device characterized in that the property is displayed in a plane on the screen of the display means in the determined visual display mode. The property drawing data stored in the data storage means includes data indicating property names for each property,
The display control means causes the display means to display a property name in association with the property when the designated property is displayed on a screen in a visual display mode. The in-vehicle navigation device described in 1. The display control means includes means for dividing the map image displayed on the screen of the display means into a plurality of display sections and determining whether or not the display ranges of the property names overlap for each display section. The in-vehicle navigation device according to claim 3 , wherein when the display range of each property name overlaps in the display category, the property name is displayed only for one property according to a predetermined priority.

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