JP3822063B2 - Guide device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a guidance device that calculates a route to an input destination and performs guidance by display or voice as the current position moves.
[0002]
[Prior art and problems to be solved by the invention]
In the navigation device, the current position is used as a guidance screen when a route search to a destination is performed based on point inputs such as a departure point and a destination, and route guidance is performed using a screen or voice based on the searched guidance route. There is a method of displaying a map of the surrounding area and displaying a current position mark thereon.
[0003]
However, when trying to select the road to travel by recognizing the information ahead from the road that is running on the displayed map, if too much information is displayed on the map, Necessary information is also buried, and there is a problem that it is difficult to accurately recognize the necessary information and determine the road on which the vehicle is traveling.
[0004]
[Means for Solving the Problems]
The present invention solves the above-described problems, and makes it possible to display necessary information in an easy-to-understand manner according to the traveling state.
[0005]
[Means for Solving the Problems]
For this purpose, the present invention provides landmark information relating to road information and a building. shape Storage means for storing information; vehicle speed detection means for detecting vehicle speed; determination means for determining whether or not the vehicle speed detected by the vehicle speed detection means is greater than or equal to a predetermined value; object shape Display means for displaying information, landmark information relating to road information displayed on the map of the display means, and a building shape Display control means for controlling the display of information, and the display control means displays landmark information relating to road information when the judging means judges that the vehicle speed is equal to or higher than a predetermined value, and a building. shape The information is controlled to be hidden, and if it is determined that the vehicle speed is less than the predetermined value, the landmark information related to the road information and the building shape Control is performed to display information.
[0006]
Also, The display control means controls a display range of landmark information related to road information by the display means based on the vehicle speed detected by the vehicle speed detection means. It is characterized by this.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an embodiment as a navigation device of a guide device according to the present invention, an input / output device 1 for inputting / outputting information relating to route guidance, and a current position detecting device for detecting information relating to the current location of the host vehicle. 2. Information storage device 3 storing navigation data necessary for route calculation, display guidance data necessary for guidance, etc., performing display guidance processing necessary for route search processing and route guidance, and controlling the entire system It is comprised from the central processing unit 4 to perform. First, each configuration will be described.
[0008]
The input / output device 1 instructs the central processing device 4 to perform navigation processing according to the driver's intention so that the destination can be input or the driver can output guidance information by voice and / or screen when necessary. It has a function to print out the processed data. As means for realizing the function, the input unit includes a touch switch 11 and an operation switch for inputting a destination by a telephone number or coordinates on a map, or requesting route guidance. Of course, an input device such as a remote controller may be used. Further, the output unit displays the input data on the screen, or automatically displays the route guidance on the screen in response to the driver's request, and is stored in the data processed by the central processing unit 4 or the information storage device 3. A printer 13 for printing out the data and a speaker 16 for outputting the route guidance by voice.
[0009]
Here, a voice recognition device for enabling voice input and a recording card reading device for reading data recorded on an IC card or a magnetic card may be added. In addition, an information center that accumulates data necessary for navigation and is provided via a communication line at the request of the driver, an electronic notebook that stores driver-specific data such as map data and destination data in advance, etc. It is also possible to add a data communication device for exchanging data with other information sources.
[0010]
The display 12 is composed of a color CRT or a color liquid crystal display, and all screens necessary for navigation such as a route setting screen, a section diagram screen, and an intersection diagram screen based on map data and guide data processed by the central processing unit 4 are displayed. Are displayed in color and a button for setting route guidance, guidance during route guidance, and a screen switching operation is displayed on this screen. In particular, passing intersection information such as passing intersection names is displayed in color in a pop-up on the section diagram screen as needed.
[0011]
The display 12 is provided in an instrument panel in the vicinity of the driver's seat, and the driver can check the current position of the host vehicle by looking at the section diagram, and can obtain information on the future route. The display 12 is provided with a touch switch 11 corresponding to the display of the function buttons, and is configured to execute the above operation based on a signal input by touching the button. The input signal generating means including the button and the touch switch constitutes an input unit, but detailed description thereof is omitted here.
[0012]
The current position detection device 2 includes a GPS receiver 21 using a satellite navigation system (GPS), a beacon receiver 22, for example, a data transmission / reception device that receives a GPS correction signal using a cellular phone (automobile phone) or FM multiplexed signal. 23, an absolute azimuth sensor 24 composed of a geomagnetic sensor, a wheel sensor, a steering sensor, a relative azimuth sensor 25 composed of a gyro, and the like, a distance sensor 26 for detecting a travel distance from the rotational speed of the wheel, and the like.
[0013]
The information storage device 3 is an external storage device that stores a navigation program and data, and is a CD-ROM, for example. The program is composed of a map drawing unit, a route searching unit, a route guiding unit, a current position calculating unit, a destination setting operation control unit, and the like, and includes an application unit and an OS unit that perform navigation signal output processing. Program for processing such as search, display output control necessary for route guidance, program for performing voice output control necessary for voice guidance and data necessary for it, and display information necessary for route guidance and map display Data is stored. The data includes map data necessary for route guidance (road map, house map, building shape map, etc.), intersection data, node data, road data, photo data, registration point data, destination point data, guide road data, It consists of detailed destination data, destination reading data, telephone number data, address data, and other data files and stores all data necessary for the navigation device.
[0014]
The central processing unit 4 includes a CPU 40 that executes various arithmetic processes, a flash memory 41 that reads and stores a program from a CD-ROM of the information storage device 3, a program that performs program checking and update processing for the flash memory 41 (program reading means) ), The coordinates of the set destination point, and the road name code No. Based on the display output control signal from the RAM 43, the image memory 44 storing image data used for the screen display on the display, the RAM 43 for temporarily storing the searched route guidance information and the data being processed, etc. An image processor 45 that extracts image data from the image memory 44, performs image processing and outputs the image data to a display, a voice read from the information storage device 3 based on a voice output control signal from the CPU, a phrase, a single sentence, A voice processor 46 that synthesizes sound and the like, converts it to an analog signal and outputs it to the speaker 16, a communication interface 47 for exchanging input / output data by communication, and a sensor input interface 48 for taking in a sensor signal of the current position detection device 2. A clock 49 for entering the date and time in the internal diagnosis information It is equipped with a. In the central processing unit 4, when data acquired by each sensor of the current position detection device 2 is fetched from the sensor input interface 48, the CPU 40 calculates the current position coordinates at regular intervals based on the data, and temporarily Write to RAM42. The current position coordinates are obtained by performing map matching processing in consideration of detection errors of various data. Further, the output values from various sensors are always corrected. Here, the route guidance is configured so that the driver can select either screen display or voice output.
[0015]
2 is a diagram showing a configuration example of road guidance data, etc., FIG. 3 is a diagram showing a configuration example of road attribute data, etc., FIG. 4 is a diagram showing a configuration example of attention point data, etc., and FIG. It is a figure which shows the structural example of data.
[0016]
2 to 5 show an example of the configuration of main data files stored in the information storage device. The guide road data file has a road number for each of the number of roads n as shown in FIG. , Length, road attribute data, shape data address, size and guidance data address, and size data, which are obtained by route search and stored as necessary data for route guidance.
[0017]
The road number is set for each direction (outbound path, return path) for each road between the branch points. The road attribute data is road guidance auxiliary information data, and as shown in FIG. 3A, the information on the elevated / underpass and the lane of the road that is elevated, next to the elevated, underpass, or next to the underpass It is data indicating information on numbers. As shown in FIG. 2B, the shape data has coordinate data including east longitude and north latitude for each of the number m of nodes when divided by a plurality of nodes (nodes) on each road. As shown in FIG. 2C, the guidance data includes intersection (or branch point) name, attention point data, road name data, road name voice data address, size and destination data address, and size data. .
[0018]
Among the guidance data, as shown in FIG. 4 (A), the caution point data is data indicating information such as level crossings, tunnel entrances, tunnel exits, width reduction points, or none, and other than branch points. This is data to call the driver's attention at railway crossings, tunnels, etc. As shown in FIG. 3 (B), road name data includes information on road types such as expressways, city expressways, toll roads, and general roads (national roads, prefectural roads, etc.), and expressways, city expressways, and toll roads. It is data of information indicating whether it is a main line or an attachment road, and is composed of road type data and an intra-type number that is individual number data for each road type. As shown in FIG. 2D, the destination data includes a destination road number, a destination name, an address of destination name voice data, a size and destination direction data, and travel guidance data.
[0019]
Among the destination data, as shown in FIG. 2E, the destination direction data is invalid (not using the destination direction data), unnecessary (not guided), straight ahead, right direction, diagonal right direction, direction returning to the right, It is data indicating information on the left direction, the diagonally left direction, and the direction returning to the left. As shown in FIG. 4 (B), the travel guidance data stores data for guiding which lane to drive when there are a plurality of lanes, right side, left side, center side, or none It is data indicating such information.
[0020]
For example, as shown in FIG. 5A, the data of the building shape map includes the data of each of N buildings after the number N of buildings, such as buildings, bridges, towers, parks, playgrounds, and roads. Remembered. The data of each building includes information on the name, address (address), type, shape, height, and details of the building. The name is the name of the building if it is a building, the resident name if it is a private house, the name of the facility if it is a facility, the name of the facility such as “Chuo-dori” or “National Highway 1” if it is a road. It is a street name, and the address (address) is the address of the building. The shape of the building is the coordinate number n representing the shape and its coordinate value (x ₀ , Y ₀ ), (X ₁ , Y ₁ ) ......... (x _n-1 , Y _n-1 The type is information on general houses, condominiums, office buildings, public facilities, roads, parks, and the like. The height is information on the floor number and the height (m). For example, in the case of a tenant building, the details are information about each resident. For the name m and each tenant, the name, telephone number, room number, classification (family business, convenience store, etc., business type, business description) It is information about. Therefore, as shown in FIG. 5B, by sequentially reading out coordinate values as information relating to the shape of the building, and connecting and drawing the information with lines, various types of buildings such as the planar shape of buildings and houses and the topography of parks are displayed. Can be output. Of course, the road can be handled as data having a shape. Further, road signs such as road entry prohibition and one-way streets, street names, and town names that are names of areas may be configured as independent data, or may be configured as associated data. In this case, for example, a mark such as entry prohibition or one-way street has a coordinate value and an angle for displaying the mark. The same applies to street names and town names.
[0021]
Next, the operation will be described. 6 is a diagram for explaining the flow of the entire system of the vehicle navigation apparatus according to the present invention, FIG. 7 is a diagram for explaining the building shape map display process, and FIG. 8 is the building shape display process. FIG. 9 is a diagram for explaining a building name display process, and FIG. 10 is a diagram showing a display example of a building shape map.
[0022]
When the program of the route guidance system is started by the CPU 51 of the central processing unit 4, the current position is first detected by the current position detecting device 2 as shown in FIG. The position name and the like are displayed (step S1). Next, a destination is set using a telephone number, an address, a facility name, a registered point, etc. (step S2), and a route search from the current position to the destination is performed (step S3). When the route is determined, the route guidance / display is repeated until the destination is reached while tracking the current position by the current position detection device 2 (step S4). If there is an input for setting a detour before arriving at the destination, a search area is set and re-search is performed in the search area, and route guidance is repeated until the destination is reached in the same manner.
[0023]
In addition, since the configuration includes a determination unit that determines a predetermined condition and a switching unit that switches a map when the predetermined condition is satisfied, for example, the map can be switched at a desired timing by a user's manual operation. Therefore, detailed information around the desired facility can be quickly provided by displaying a road map during traveling on the route and switching the map when it is desired to detour along the way. Thereby, various information, such as a desired facility position, a parking lot position, or information on one-way surroundings, can be obtained, and the destination can be reliably reached.
[0024]
In the above processing, road maps and building shape maps are displayed as necessary in each process such as input, confirmation, setting of the current position, destination, etc., confirmation of the search route, route guidance, etc. Next, the building shape map display process using the data described in FIG. 5 will be described.
[0025]
For example, when a building shape map is selected as shown in FIG. 7 in the map display mode (step S11), first, a shape map display process is executed (step S12), and the building is displayed on the shape map. A name display process is executed (step S13). Then, the current position mark and guidance information are displayed. (Step S14). The shape of the building is a flat shape if it is a general house, building, or other building, and is a flat shape if it is a park or road. Therefore, in the case of a building with a large number of tenants, there is information about the tenants of the building, and even a single building shape has a lot of information, so the shape map in step S2 In the display processing and the building name display processing in step S3, the shape is displayed in a display mode that is easy to recognize different from general houses for buildings and public facilities with a lot of information. When a name is displayed and the names overlap, the name is not displayed. Furthermore, the names of towns and public facilities are displayed in the order of the names of towns, public facilities, and in-building information by setting a high priority.
[0026]
In the building shape display process, as shown in FIG. 8A, the building shape map data in the display range is retrieved from the information storage device 3 and read out (step S21), and the building shape display mode to be displayed is displayed. Is determined (step S22). This display mode is the color of the shape to be displayed, its density, their pattern, etc., as described above, and is determined based on the type, height, and configuration scale. For example, it can be distinguished by public facilities, stations, theaters, museums, amusement parks, towers, condominiums, buildings other than general houses, etc., and public facilities can be distinguished from public institutions such as government offices, police stations, and public halls. And public facilities such as playgrounds, and even buildings other than ordinary houses can be distinguished by height (number of floors), number of tenants. After determining the display mode in this way, the building shape map is displayed (step S23), and the inside of the shape is displayed in the determined display mode (step S24).
[0027]
For example, when a display mode determination table as shown in FIG. 8B is registered, the display mode in step S22 is determined by referring to the building shape map data to be displayed and the display mode determination table. Can do. FIG. 8B shows the color a when the building to be displayed is a public facility, the color d when it is a guide road, the scale when there is detailed information that is neither a public facility nor a road. In other cases, if the height is equal to or greater than a predetermined value, the color, its density, etc. corresponding to the type, height, and configuration scale, such as a c-color net pattern, etc. It is an example in which display modes such as those patterns are set. Therefore, when this display mode determination table is used, the following processing is performed in step S22.
[0028]
First, as shown in FIG. 8C, the data of each building shape map is referred to as a display mode determination table (step S31), and first, it is checked whether the type is a public facility, a road, or the other (step S32). If it is a facility, the display mode is determined to be a color (step S33), and if the road is a road on the searched guide route (guide road), the display mode is determined to be d color. (Step S34). Since the searched route has the guide road data as described with reference to FIG. 2, the guide route is drawn on the map with a width corresponding to the number of lanes based on the guide road data. In other cases that are neither public facilities nor roads, it is next checked whether or not there is detailed information (step S35). If there is, it is determined whether or not the number of names in the information is α or more (step S36). ), The display mode of those above α is determined to be b color (step S38), and the display mode of those not exceeding α is determined to be light b color (step S37). Further, even if there is no detailed information, the height of the building is further examined (step S39), and the display mode is determined to be a c-color net pattern for those having a certain height (step S40). In the case of this example, whether or not it is a public facility is given the highest priority, then detailed information, that is, the scale of the structure of the building is given priority, and finally the display mode is determined by the height.
[0029]
The names displayed on the building vary in length, and it is not possible to display all names depending on the size of the screen and the display range. Therefore, as in the case of determining the display mode described above, for example, a priority order according to type and a priority order according to the amount of detailed information are provided and displayed in a non-overlapping range. FIG. 9 shows an example of the processing. First, names are stored in the descending order of the number of names m in the detailed information from the data in the range to be displayed (step S51). Thereafter, the display range of the names on the map is calculated (step S53) for all the names in the descending order of the number of names m (step S52), and those that do not overlap the display range of the names already displayed (step S54). The name is displayed on the map (step S55). And a display range is memorize | stored (step S56), and it returns to step S52 and repeats the same process.
[0030]
Here, the display range of the name is determined by sorting from the center of the building to both sides according to the number of characters from the vertical and horizontal sizes and character spacing, and is stored by the coordinates of the upper left and lower right positions of the character string. . Also, if the display ranges do not overlap, judging from the vertical and horizontal sizes of the characters and the character spacing, adjacent names are displayed on a single surface with a slight spacing, making it difficult to see the map. When the distance is more than the above, processing may be performed so as to determine that the display ranges do not overlap. As a method in this case, for example, it can be realized by setting a character size α times above and below a character string and β times left and right as a display range, and setting a predetermined number of characters vertically and horizontally as an allowable interval. Needless to say, the name includes not only character strings but also marks such as schools, hospitals, and post offices that are generally used for displaying maps, service marks, and other various characters and patterns.
[0031]
As described above, in the building shape map data of the present invention, the center coordinates and the coordinates of the display range in the case of displaying the name from the shape coordinate string can be determined by calculation. Therefore, the other map memorize | stored with the building shape map on the information storage device can be displayed, and the name of the data of the building shape map can be displayed on the display range calculated from the coordinate sequence. In this case, the display of the map and the display of the name can be executed without being aware of each other, and the display and the display of the name can be eliminated by matching the respective display coordinates. By combining such processes, it becomes possible to share the coordinate string and name of the shape in the data of the building shape map with other maps as name display data, and the amount of data can be greatly reduced.
[0032]
FIG. 10 shows a display example of a building shape map, FIG. 10A shows a display example of a building shape map when the vehicle is stopped, and a display example of a building shape map from which information other than road information is deleted. FIG. 10B shows an example in which a route display, a current position mark display, a landmark display at a guidance intersection, and a one-way mark display are incorporated into a building shape map from which information other than road information is deleted. FIG. 10 (A) also displays the names of parks, public facilities, and streets as the names of the buildings, and some of the buildings represented by several patterns have different display modes. is there. In the case of color display, the display mode can be changed according to data type information, height information, number of detailed names, etc. For example, public facilities such as schools, city halls, post offices, stations, etc., buildings that can be generally recognized as targets such as parks, and in tenant buildings, buildings with a large number of names By setting it as a different display mode, it is possible to make it easy to understand local targets and features displayed as a map. FIG. 10B shows an example in which the drawing of a house shape is limited and displayed from a building shape map. Here, information on a road such as a one-way mark is highlighted, a route display, and a landmark. An example of display is shown in FIG. These will be further described later.
[0033]
When displaying a building shape map in normal mode, the above processing is performed. However, when a building shape map is displayed for route guidance in a running vehicle, information on the map is displayed. If the amount is large, information necessary for traveling is buried in other information. In particular, during traveling at a certain vehicle speed or higher, it is difficult to recognize information by viewing the screen while traveling even if a map is displayed. Therefore, even when the building shape map is displayed on the guidance screen, it is necessary to display the building information so that the guidance information can be identified and recognized almost instantaneously with a simple glance. A display example will be described below.
[0034]
FIG. 11 is a diagram showing an example of a guidance screen using a building shape map, FIG. 12 is a diagram for explaining an example of a house shape display process, and FIG. 13 is a diagram for explaining an example of a one-way mark display process. FIG. 14 is a diagram for explaining an example of route display processing, and FIG. 15 is a diagram for explaining an example of mark display processing. 11, 61 is a road, 62 is a guide route, 63 is a center line, 64, 65 and 69 are one-way roads, 66 and 70 are one-way marks, 67 is a search range line, and 68 is a current position mark.
[0035]
When the building shape map is displayed on the guidance screen during traveling, the current position on the road is basically displayed on the road 61, one-way roads 64, 65, and 69 as shown in FIG. A current position mark 68 is displayed. In addition, as information related to the road, information necessary for driving such as one-way marks 66, railroad crossings, pedestrian crossings, and landmarks along the road that can be easily recognized is easily understood according to driving conditions (emphasis). Display). In this case, the necessary information is information related to the road around the current position, which is within a certain radius around the current position, information about the road along the traveling direction from the current position, and the traveling direction. Only information relating to roads within a predetermined angle range and road information within a predetermined distance range in the traveling direction are highlighted. Further, the range of angles and distances may be changed according to the vehicle speed, such as emphasizing a relatively far front for high speed travel and emphasizing a relatively close front for low speed travel. Further, information related to the calculated guide route may be retrieved from the storage means, and the information related to the guide route may be emphasized. The information related to the guide route is, for example, information related to a road connected to a road on the guide route or information related to a road around the road on the guide route. Among these, the search range line 67 is a range set with a certain angle with respect to the front of the current position mark 68, for example, an angle of ± 60 °, in order to search for information to be highlighted. For example, the one-way mark 66 is searched and highlighted in this range, and the one-way mark 70 is normally displayed because it is outside the search range. Before the current position mark 68 reaches the position shown in the figure, That is, when it is in front of the one-way road 69 shown in the lower part of the figure, the one-way mark 70 is also highlighted, and after passing, the display is switched from the highlighted display to the normal display. Therefore, in the building shape map shown in FIG. 10A, information that is not necessary for traveling, such as a house shape, is drawn in the same color as the background color or is not drawn. As shown in (B), it is not substantially displayed. The guide route 62 is drawn with a predetermined width based on the coordinate value and the number of lanes from the guide road data. When searching for a highlight mark or the like from the position of the current position mark 68, the range is set by an angle with respect to a certain traveling direction as described above, but both sides ahead of the current position mark 68 are based on the guide route 62. The range may be set at a certain distance. As shown in FIG. 10 (B), the current position mark and the route are displayed from the structure shape map shown in FIG. 10 (A), and the one-way mark is displayed as information on the road along the route. FIG. 10C shows the highlight, and the marks of school, post office, and gas station as marks.
[0036]
Next, an example of a display process corresponding to traveling by a building shape map will be described. As a way to use the building shape map, for example, when finding a point you want to set as the destination from the map of the area displayed based on some standard information, it is desirable to display more detailed information While driving, only information related to the road need be highlighted. On the other hand, a house shape that is not related to the road becomes unnecessary. Therefore, in the display about the house shape, as shown in FIG. 12, the current position is recognized (step S61), a building shape map around the current position is drawn (step S62), and whether or not the vehicle speed is equal to or higher than a predetermined value. Is determined (step S63). If the vehicle speed is equal to or higher than the predetermined value, a background color is set on the pallet of the house shape, for example, as shown in FIG. 10B (step S64). If the vehicle speed is not higher than the predetermined value, For example, by setting a house shape color as shown in FIG. 8B on the house shape palette, a display as shown in FIG. 10A is displayed (step S65). In this process, whether or not the house shape is not related to the road to be guided can be determined by the data type of the building shape map described with reference to FIG. Therefore, a special type of house shape can be excluded from this processing target.
[0037]
In addition, when the house-shaped display palette that is not required to be displayed during traveling is changed to the same palette as the background color based on a predetermined vehicle speed as described above, the display screen is not substantially displayed. The drawing process is the same as the actual display. In this way, switching the display contents between when traveling at a predetermined vehicle speed or more and when stopping or traveling at a low speed by changing the pallet has the effect that display processing at the boundary of the predetermined vehicle speed can be performed quickly. Further, the display control means is provided with means for determining a predetermined condition, and when it is determined that the predetermined condition is satisfied, only information necessary for display is rendered by selecting information necessary for display from the storage means. It can also be configured. With this configuration, the time required for the drawing process can be reduced, so that the drawing process can be performed quickly even when the vehicle is traveling at a high speed or when a high-speed drawing process is required, such as when scrolling the screen. There is an effect that can be. Further, these processes may be switched as necessary by means for determining a predetermined condition.
[0038]
In addition, information regarding roads such as one-way marks with respect to the house shape is selected and highlighted as necessary information on the direction of travel while traveling. In the one-way mark display, as shown in FIG. 13, it is determined whether or not the vehicle speed is equal to or higher than a predetermined value (step S71). If the vehicle speed is equal to or higher than the predetermined value, one-way traffic within the predetermined value from the current position direction is determined. The mark is searched (step S72), and the searched one-way mark is highlighted (step S73). However, if the vehicle speed is not equal to or higher than the predetermined value, it is determined whether or not the previous vehicle speed is equal to or higher than the predetermined value (step S74). If the previous vehicle speed is equal to or higher than the predetermined value, the vehicle speed is highlighted. The highlighting of the one-way mark is turned off and normal display is performed (step S75). In this case, the one-way mark around the current position may be highlighted as described above, or the search range may be set according to the distance or angle and changed according to the vehicle speed. Since the one-way mark is not registered in the building shape map data, if the search cannot be performed, the one-way mark may be displayed by determining the one-way according to the type of the road data. Further, not only one-way marks but also marks such as railroad crossings, pedestrian crossings, traffic lights, etc., may be the target of such display control, and particularly roads that are prohibited from entering may be highlighted. As a form of highlighting, the information to be highlighted may be displayed more prominently than other currently displayed information, or only the information to be highlighted may be displayed on the screen. Note that to display only the information you want to highlight on the screen, you can erase the information other than the information you want to highlight from the screen, or select only the information you want to highlight and draw only the selected information. May be. In the example of FIG. 10C, a one-way road is connected to the rear of the current position, but since it is not a road in the traveling direction, the one-way mark displayed in FIG. 10B is deleted. Only the one-way mark in the traveling direction is displayed, and as a result, highlighting is performed.
[0039]
When displaying a route on a road map, the road is displayed as a single line, so it is only necessary to display the road in a specific color, but when displaying a route on a building shape map Since the line and the center line on both sides are drawn and displayed according to the actual width, it is necessary to display the route on the traveling lane side by shifting from the center line. In the display of the route, as shown in FIG. 14, the following processing is repeated until the number of route roads is processed for each road number based on the guide road data (step S81). The route width is calculated from the number of lanes of the route road (step S82), and it is determined whether the road is one-way (step S83). In the case of a one-way road, a contour line is created from the route width (step S85). Is created (step S84), and the contour line is filled with a predetermined pattern as shown in 62, 71 to 73 of FIG. 11 and FIG. 10C (step S86).
[0040]
Since the guide road data created from the road map data has information on each road as shown in FIGS. 2 to 4, the information can be used to match on the building shape map. In addition, by displaying the route with a blurred road width pattern such as a mesh pattern, road information such as lane information and road names can be displayed in an easily understandable manner. Further, by using information from the center from the right to the left of the travel guide data shown in FIG. 4B, even when the number of lanes is plural, as shown by 73 in FIG. A route may be displayed by selecting a specific lane. In the route display shown in FIG. 11B, since the route 71 at the current position is a one-way road, a pattern is drawn as it is in the center of the road. When turning left, it is an example in which a lane closer to the center is selected as shown in the patterns shown in the routes 72 to 73 in order to make a right turn from the route 73 to 74 immediately at the next intersection.
[0041]
When route guidance is performed using a road map, conventionally, when approaching an intersection to be guided, in order to improve the visibility of the guidance information, a more detailed intersection guide map is displayed. However, when performing route guidance using a building shape map, the map itself has detailed information, so even at a guidance intersection, by displaying a characteristic landmark without displaying an intersection guide map. I can guide you. In the display of the mark, as shown in FIG. 15, the current position is recognized (step S91), and it is determined whether or not the distance to the guidance intersection is within a predetermined value (step S92). The facility around the guidance intersection is searched (step S93). Then, a searchable landmark is searched from the searched facilities (step S94), and the mark is drawn at the searched position (step S95). For example, when a facility such as a gas station, a bank, a public office (a police station, a fire department, a government office, a post office, a school, etc.), a convenience store, a family restaurant, etc. is in the vicinity of an intersection to be guided, for example, FIG. By displaying landmarks consisting of various patterns (landmarks) such as service marks and characters as shown in Fig. 3, it is possible to understand even if the building shape map remains as it is without switching to the intersection map as in the past. You can easily guide intersections and routes. Needless to say, characters that do not generally have a mark may be characters such as “Office” in FIG. Note that the predetermined value when determining whether the distance to the guidance intersection is within a predetermined value may be changed according to the vehicle speed. In addition, by providing means for searching the mark information around the detected current position, the mark is displayed with the movement of the current position, and the current position can be easily confirmed. Further, only a mark along the route may be displayed by providing means for searching the mark information around the route. Further, the mark to be displayed may be controlled by searching for the mark information ahead of the current direction from the current position. When displaying a mark around the current position, the search range and distance may be changed according to the vehicle speed. Further, the search may be performed over a wide range, and the mark information to be displayed may be displayed by performing selection processing according to the vehicle speed.
[0042]
Next, the operation of the system for loading a program from the CD-ROM of the information storage device 3 storing the program and data to the flash memory 41 will be described. 16 is a diagram for explaining program loading processing, FIG. 17 is a diagram for explaining program version check processing, and FIG. 18 is a diagram for explaining the structure of CD-ROM data.
[0043]
The navigation device according to the present invention stores a relatively large-capacity flash memory 41 for reading a program from a CD-ROM of an external storage device and a program (program reading means) for starting up a CD as described above. A small capacity ROM 42 is incorporated. The flash memory 41 is a non-volatile storage unit that retains stored information even when the power is turned off. Then, as a CD start-up process, a program in the ROM 42 as a program reading means is activated and the program stored in the flash memory 41 is checked, and the CD-ROM disc management information and the like of the information storage device 3 are read. The program loading process (update process) is performed based on this information and the state of the flash memory 41.
[0044]
First, when the power is turned on, the program is checked whether or not the program is normally written in the flash memory with the screen turned off as shown in FIG. 16 (step S11) (step S12). If this program check is OK, the program stored in the flash memory is started (step S13), an opening screen is displayed (step S14), and the CD-ROM disc management information is read (step S15). CD-ROM program version No. And the program version number stored in the flash memory. To check the program version (step S16). Based on the comparison of the program versions, it is determined whether or not the program is to be updated (step S17). If the CD-ROM program version is not upgraded from the flash memory program version, the flash memory program is not updated. To display a map screen (step S18), but if the program version of the CD-ROM has been upgraded, switch to the upgrade screen (step S19), clear the flash memory (step S20), The process returns to step S12.
[0045]
If the program check is NG in step S12, the CD-ROM disc management information is read (step S21), and it is first checked whether the disc is a dedicated disc (step S22). If it is not a dedicated disk, a guide message "Please insert a dedicated disk" is displayed on the screen (step S23). If it is a dedicated disk, the CD-ROM loader program is read (step S24) and the loader program is started (step S24). Step S25). Then, a message “program loading” is displayed (step S26), the CD-ROM navigation program is read (step S27), written to the flash memory (step S28), and restarted (step S29). The process returns to step S12. When the program is normally written in the flash memory as described above, even if a compatible CD-ROM is set, the CD-ROM is upgraded by comparing the program versions of both. Only by updating the program in the flash memory, the system can always be operated with the latest version of the program without loading a useless program.
[0046]
In the version check process in steps S16 to S17, as shown in FIG. 17, the program version in the flash memory is compared with the program version in the CD-ROM (step S31). Are different (step S32). If there is no difference, the update number in the flash memory is further updated. Is checked whether it is older than the one in the CD-ROM (step S33). And classification No. Is different, or classification No. The update No. in the flash memory is not different. If it is older, the program is updated and the classification No. is updated. The update No. in the flash memory is not different. If it is not older than the one in the CD-ROM, it is determined that the program is not updated.
[0047]
The structure of the CD-ROM data includes, for example, disk management information, a loader program, a navigation program and data as shown in FIG. The disc management information includes the type of CD-ROM (for navigation, music, video, etc.), and for navigation, the district version, the national version, and the classification No. for sightseeing, leisure, genre, etc. , Update No. And so on. In the case of navigation, the district version can be identified from the coordinates by holding the area in the coordinates in the district version. As described above, the navigation program includes a map drawing unit, a route search unit, a route guidance unit, a current position calculation unit, a destination setting operation control unit, and the like. The data is map data, search data, guidance data, map matching data, destination data, and the like.
[0048]
When a CD changer is used in combination with the program reading means, the CD can be automatically exchanged based on the exchange instruction. When a CD is designated, first, a process for reading CD management information (disk label) of the CD is executed, and the content of the disk management information is judged to select a CD to be driven. If the selected CD is a navigation CD, the selected CD classification No. , Update (version) No. The above program memory update process is executed.
[0049]
In addition, this invention is not limited to said Example, A various deformation | transformation is possible. For example, in the above embodiment, landmarks are displayed as landmarks. However, since the building shape map data has height information, searching for this height information, and by type, like a tower By searching for a special building, a particularly high or special building may be displayed as a landmark. Further, in the map switching, a road map may be displayed and guided to the vicinity of the destination, and the map may be switched to the building shape map on condition that the vicinity of the destination is approached.
[0050]
【The invention's effect】
As is clear from the above description, according to the present invention, the landmark information and the building related to the road information. shape Information on roads can be displayed in an easy-to-read manner, and if the vehicle speed exceeds shape By hiding the information, the visibility of the landmark information related to the road information can be further improved.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of a navigation apparatus as a navigation apparatus according to the present invention.
FIG. 2 is a diagram illustrating a configuration example of road guidance data and the like.
FIG. 3 is a diagram illustrating a configuration example of road attribute data and the like.
FIG. 4 is a diagram illustrating a configuration example of attention point data and the like.
FIG. 5 is a diagram illustrating a configuration example of data of a building shape map.
FIG. 6 is a diagram for explaining the overall system flow of the vehicle navigation apparatus according to the present invention.
FIG. 7 is a diagram for explaining a building shape map display process;
FIG. 8 is a diagram for explaining a building shape display process;
FIG. 9 is a diagram for explaining a display process of a building name.
FIG. 10 is a diagram illustrating a display example of a building shape map.
FIG. 11 is a diagram showing an example of a guidance screen based on a building shape map.
FIG. 12 is a diagram for explaining an example of a house shape display process;
FIG. 13 is a diagram for explaining an example of a one-way mark display process;
FIG. 14 is a diagram for describing an example of route display processing;
FIG. 15 is a diagram for explaining an example of mark display processing;
FIG. 16 is a diagram for explaining program loading processing;
FIG. 17 is a diagram for explaining program version check processing;
FIG. 18 is a diagram for explaining the structure of CD-ROM data;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Input / output device, 2 ... Current position detection device, 3 ... Information storage device, 4 ... Central processing unit, 11 ... Touch switch, 12 ... Display, 13 ... Printer, 16 ... Speaker, 21 ... GPS receiver, 22 ... Beacon receiving device, 23... Data transmitting / receiving device, 24... Absolute azimuth sensor, 25... Relative azimuth sensor, 25 is distance sensor, 40... CPU, 41. Image processor 46 Sound processor 47 Communication interface 48 Input interface

Claims (2)

Storage means for storing landmark information and building shape information relating to road information;
Vehicle speed detection means for detecting the vehicle speed;
Determining means for determining whether the vehicle speed detected by the vehicle speed detecting means is equal to or higher than a predetermined value;
Display means for displaying landmark information and building shape information about road information on a map;
Display control means for controlling display of landmark information and building shape information on road information displayed on the map of the display means, and the display control means determines that the vehicle speed is a predetermined value or more by the determination means. If it is, the landmark information related to the road information is displayed and the building shape information is controlled to be hidden.
A guide device that controls to display landmark information and building shape information regarding road information when it is determined that the vehicle speed is less than a predetermined value.   The guide device according to claim 1, wherein the display control means controls the display range of the mark information related to road information by the display means based on the vehicle speed detected by the vehicle speed detection means.

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